The Genetic Link Between Asthma and Mental Health – Pulmonology Advisor

Asthmahas long been associated with lower quality of life as a result of reducedactivity and increased psychological stress.1 Indeed, any identifiedlinks between asthma and mental health have primarily been unidirectional, withasthma leading to mental illness. However, recent studies have revealed geneticlinks between asthma and mental health.

Research suggests that people with asthma are more likely to develop mental health problems compared with the general population. In a study conducted with school children, the prevalence of diagnosed mental health conditions among those with asthma was 8.2%, which was nearly double the prevalence among those without asthma (4.8%).2 Another study comprising adults showed that mood disorders were strongly associated with allergic asthma, late-onset asthma, and infection-based asthma.3 In addition, researchers discovered that mental health care services were more likely to be used by people after a diagnosis of asthma.4

Morestudies are underway to investigate the bidirectional connection between asthmaand mental health. One study has linked asthma severity to lifetime and currentanxiety, with asthma preceding anxiety in 48% of the patients and anxietypreceding asthma in 52% of the patients.5

Thereis growing evidence for the involvement of genetics in this asthma-mentalhealth connection. A Swedish study that identified self-report associationsbetween asthma and major depressive disorder (MDD), anxiety, and neuroticismalso found genetic correlations between asthma and MDD, but not between asthmaand anxiety or neuroticism.6

Anotherstudy, a large-scale genome-wide cross trait analysis, has shown a strongassociation between asthma and 3 mental disorders: attention-deficit/hyperactivitydisorder (ADHD), anxiety disorder, and MDD.7 A total of 7 loci werefound to be jointly associated with asthma and ADHD; 1 loci with asthma andanxiety disorder; and 10 loci with asthma and MDD.

Accordingto Dr Zhaozhong Zhu, a lead researcher, Mendelianrandomization a method of using measured variation in genes of known function was used to inferputative causal relationshipsbetween asthma and mental health disorders in both directions, with our resultssuggesting that ADHD and MDD might increase the risk for asthma. Dr Zhu makesit clear that the mechanismof the association is unknown. Thecausal relationship found in the study is only based on genetic variables, heexplains. The epidemiologic association includes 2 key components: genetics(ie, genes and biological mechanisms) and environment (ie, social factors,exposure to certain conditions [asthma], and medication use).

The study findings indicate geneticcausality in the direction of mental illness causing asthma. However, theenvironmental causality is in the reverse direction and outweighs the geneticcausality; thus, the overall epidemiologic causality is in the direction ofasthma causing mental health disorders.

Compared with other mentaldisorders, depression appears to have the strongest link to asthma. In additionto the 10 loci found by Dr Zhu and his team, a single-nucleotide polymorphism(SNP) known as rs4672619, located on the Erb-B2 receptor tyrosine kinase 4gene, has been implicated in the comorbidity of depression and asthma.8The researchers who discovered the SNP evaluated the relationship between thedepressive status of the individuals and the rs4672619 genotypes on asthmasymptom severity. In childhood asthmatics, severe depression was related toless severe asthma symptoms, while in those with heterozygous and homozygousvariant alleles, severe depression was related to more severe asthma symptoms.

In elderly patients with asthma, thereverse was true. Those with the homozygous reference allele had a positivecorrelation between depression and asthma symptom severity, while a negativecorrelation was seen in those with heterozygous and homozygous variant alleles.Further studies on the relationship between the conditions could lead to thedevelopment of personalized therapies for the simultaneous treatment of bothconditions.

Few studies have established thegenetic link between asthma and anxiety. A Chinese investigation demonstratedthe effect of interactions between serotonin transporter (5-HTT), brain-derivedneurotrophic factor (BDNF), and the neuropeptide S receptor 1 gene, NPSR1-AS1 polymorphisms on anxiety and depression.9Interactions between 5-HTT (LL alleles) and BDNF (A+ allele) led to anincreased anxiety score, while interactions between BDNF (A+, GG) and NPSR1(AA, T+) increased the depression score.

While the genetic link betweenasthma and ADHD was strongly revealed in Dr Zhus study, most other studieshave been anecdotal. A large Swedish study found a significant associationbetween asthma and ADHD, even after removing possible confounding variables.10It has been hypothesized that because asthma and ADHD both have large geneticcomponents, people who are genetically susceptible to one condition may besusceptible to the other.11

Studying genetic variants raises thequestion of whether any genetic links have cross-cultural implications. Whilethe participants in Dr Zhus research were mainly European, Dr Zhu expectsthat, Asthma and mental health disorders should be genetically similar, butnot the same across major populations, such as African American, Hispanic, orAsian. He points out that one of the shared genetic loci between asthma andMDD, the human leukocyte antigen region on chromosome 6, has a pervasivegenetic effect in many diverse populations.

Currently, corticosteroids areconsidered the most effective long-term treatment for asthma. However, chroniccorticosteroid use has been associated with psychosis, depression, anxiety, andmania in people with asthma.12,13 Psychological treatments are being exploredas alternative interventions for asthma and while no psychotherapy has beenscientifically proven to improve asthma and comorbid mental illness, there hasbeen an increased interest in the use of cognitive behavioral therapy.14,15

Understanding the geneticassociation between asthma and mental health creates an opportunity for thedevelopment of more effective drugs and therapeutic approaches that could treatasthma and associated mental health disorders together. In Dr Zhus study, functionalanalysis revealed that the identified variants regulated gene expression intissues of various body systems, including the respiratory and immune system.Thus, further understanding of these variants may lead to treatments thataddress the respiratory and immune system problems often seen in people asthma.

According to Dr Zhu, In the short term,we aim to inform the general population that mental health disorders can haveshared genetic factors with asthma. Therefore, controlling environmentalfactors, such as eating healthy, enjoying a happy life, and being careful withthe potential adverse effects of medication, will help to prevent asthma andmental health disorders. In the long term, with more mechanistic studies, wehope to provide direction in the development of drugs for preventing andtreating both conditions at the same time.

References

1. American Academy of Allergy Asthma & Immunology. Increased mental health care use in adults after asthma diagnosis. http://www.aaaai.org/global/latest-research-summaries/New-Research-from-JACI-In-Practice/mental-health. April 7,2017. Accessed November 5, 2019.

2. Lawson J, Rennie D, Dyck R, Cockcroft D, Afanasieva A. The relationship between childhood asthma and mental health conditions.Eur Respir J. 2017;50(suppl 61):PA595.

3. Labor M, Labor S, Juri I, Fijako V, Grle S, Plavec D. Mood disorders in adult asthma phenotypes.J Asthma. 2017;55(1):57-65.

4. To T, Ryckman K, Zhu J, et al. Mental Health Services Claims and Adult Onset Asthma in Ontario, Canada.J Allergy Clin Immunol Pract. 2017;5(5):1388-1393.e3.

5. Del Giacco S, Cappai A, Gambula L, et al. The asthma-anxiety connection.Respir Med. 2016;120:44-53.

6. Lehto K, Pedersen N, Almqvist C, Lu Y, Brew B. Asthma and affective traits in adults: a genetically informative study.Eur Respir J. 2019;53(5):1802142.

7. Zhu Z, Zhu X, Liu C et al. Shared genetics of asthma and mental health disorders: a large-scale genome-wide cross-trait analysis [published online October 17, 2019].Eur Respir J. doi:10.1183.13993003.01507-2019

8. Park H, Song W, Cho S, et al. Assessment of genetic factor and depression interactions for asthma symptom severity in cohorts of childhood and elderly asthmatics. Exp Mol Med. 2018;50(7):77.

9. Yang Y, Zhao M, Zhang Y, Shen X, Yuan Y. Correlation of 5-HTT, BDNF and NPSR1 gene polymorphisms with anxiety and depression in asthmatic patients. Int J Mol Med. 2016;38(1):65-74.

10. Cortese S, Sun S, Zhang J, et al. Association between attention deficit hyperactivity disorder and asthma: a systematic review and meta-analysis and a Swedish population-based study. Lancet Psychiatry. 2018;5(9):717-726.

11. Rapaport L. Links seen between asthma and ADHD. Reuters website. http://www.reuters.com/article/us-health-adhd-asthma/links-seen-between-asthma-and-adhd-idUSKBN1L12FZ. August 15, 2018. Accessed November 14, 2019.

12. Kewalramani A, Bollinger M, Postolache T. Asthma and mood disorders.Int J Child Health Hum Dev. 2008;1(2):115-123.

13. University of Newcastle Australia. Severe Asthma Toolkit. Asthma and Mental Health. https://toolkit.severeasthma.org.au/living-severe-asthma/mental-emotional-health/. Updated February 12, 2019. Accessed November 5, 2019.

14. Kew K, Nashed M, Dulay V, Yorke J. Cognitive behavioural therapy (CBT) for adults and adolescents with asthma.Cochrane Database Syst Rev. 2016;9:CD011818.2

15. Pateraki E, Morris P. Effectiveness of cognitive behavioural therapy in reducing anxiety in adults and children with asthma: a systematic review.J Asthma. 2018;55(5):532-554.

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The Genetic Link Between Asthma and Mental Health - Pulmonology Advisor

Camel Milk and Autism: Connecting the Genetic Dots | DNA Science Blog – PLoS Blogs

After reading Christina Adamss new book Camel Crazy: A Quest for Miracles in the Mysterious World of Camels(New World Library), I may have a new favorite animal (sorry, cats and hippos).

Most of us know camels as curiosities at zoos. As beasts of burden highly adapted to hot and dry climates, theyve served the trade routes that helped build civilizations, and may indeed flourish in our increasingly hot and dry world. We value their hide, meat, and especially their milk.

Camels are unusual, biologically speaking. And that may be why their milk can alleviate some aspects of autism.

Camel milk sounds weird to American ears, but camels are a domestic fact of life elsewhere. Although the US classifies them as exotic animals, they actually have early origins here; fossils have been found in Los Angeles. But the true reservoir of knowledge on camels is found in rural cultures and universities in the Middle East, Asia, and Africa, Christina told me.

Got Camel Milk?

In 2005, Christina met a camel at a childrens book fair in Orange County CA. Rather than hauling kids around, the animal was standing near a display of lotions and soaps made with camel milk. When the owner started to tell Christina how the milk is hypoallergenic and helps premature babies in the Middle East, she glanced over at 7-year-old Jonah. Hed already had four years of costly treatments for autism.

Might it help reboot my sons immune system and help his autism symptoms? she recalls thinking, aware of a link to immune dysfunction. Cow milk and cheese made him hand-flap and walk in circles, which he described as feeling like having dirt in my brain. Vegan substitutes like rice, nut, or soy increased his allergic response.

Camel Crazy details Christinas two-year journey to find the milk. Once she started giving it to Jonah, four ounces at a time, mixed in with food like cereal, his behavior changed quickly.

He became calm. Inquisitive. Caring. His language became more emotional and focused. He held his head straight instead of rolling it. Eating became neat, not a mess fest. He dressed himself and began making eye contact. He even got his shoes and backpack on and was calmer in the car going to school.

By the third dose, Jonah was sleeping through the night. He became more fluid, social, and attuned. Within days he could cross the street without me holding on to him. Within weeks his skin grew smoother. The milk also reversed his skin irritation, agitation, mental distraction, hyperactivity, and stomach pain, Christina recalled.

So she did research and spread the word, first in an article Got Camel Milk? that went viral, then in a peer-reviewed case report, Autism Spectrum Disorder Treated With Camel Milk, published in Global Advances in Health and Medicine. After describing Jonahs early difficulties, she wrote on October 10, 2007, two weeks before my sons tenth birthday, he drank his first half cup (4 oz) of thawed raw unheated camel milk. The case report documents Jonahs sustained symptom improvements associated with drinking half a cup a day from 2007 to 2013.

Christina then began traveling the world, giving presentations on camel milk and autism, and consulting with scientists and vets. Camel Crazy details her immersion into the world of camels and cameleers, from Tuareg, Amish and Somali people in America to herders in India, Dubai and Abu Dhabi. She serves on the editorial board of the new International Journal of Camel Science.

I was a beta reader for Camel Crazyand loved it. Being a nerd I searched for the science, and wasnt disappointed. The milk indeed has some startling differences from other milks, yet tastes, Christina says, like cows milk.

Camels drink a lot, pee a little, exhale minimal vapor, have insulating coats, and their red blood cells balloon and shrink as the water content in the bloodstream shifts. Natural selection has favored persistence of these traits that provide adaptation to heat, aridity, and exposure to intense ultraviolet radiation and choking dust. Body temperature ranges from 93.2-104F (3440C).

Being specifically a genetics nerd, I delved deeper into the DNA that encodes the unusual versions of proteins that might explain the magic of camel milk, as well as other details of the physiology. Much of the info below comes from the article Desert to Medicine: A Review of Camel Genomics and Therapeutic Products, from three researchers at United Arab Emirates University.

Fighting an Opioid Released from Casein Breakdown

The first technical paper Christina found was The etiology of autism and camel milk as therapy, from Ben Gurion University researchers Reuven Yagil and Yosef Shabo. Parent reports inspired their work.

They zeroed in on an opiate-like effect. Casein, the most abundant milk protein, breaks down into peptide pieces. And one of them, beta-casomorphin-7, is an opioid. It can slip through the leaky gut of a person with autism and enter the brain. Could an opiate bathing the brain affect social interactions and lack of interest in surroundings?

Other breakdown peptides of casein (-casein and no -lactoglobulin), which are more abundant in cows milk, may spike milk allergies.

Upping Anti-Oxidants

Camel milk delivers potent anti-oxidants that might temper autism symptoms, wrote King Saud University researchers Laila Al-Ayadhi and Nadra Elyass Elamin in a2013 report. People with autism are more sensitive to oxidative stress, which is damage from unstable forms of oxygen called oxygen free radicals.

The researchers measured levels of three anti-oxidants in the blood of 60 kids with autism: superoxide dismutase, myeloperoxidase, and an enzyme needed to make glutathione. Over a two-week period, 24 children drank raw camel milk, 25 drank boiled camel milk, and 11 drank cows milk. The trial was double-blinded and randomized, but it wasnt a crossover, in which each child would have had all three milk experiences. Nevertheless, raw camel milk was superior in anti-oxidant levels and a behavioral rating scale.

Special Tiny Antibodies

Camels share with only their camelid brethren (llamas, alpacas, vicunas, and guanacos) tiny antibodies in milk, called nanobodies. Most antibodies have one or more Y-shaped subunits; a nanobody is one arm of one Y, the variable region that distinguishes species. A student discoveredcamel nanobodies in a lab course at the University of Brussels in 1993, analyzing a dromedarys blood serum. Camels make large antibodies too.

Nanobodies can squeeze into places more bulbous antibodies cannot, vanquishing a wider swath of viruses and bacteria. They look strikingly like monoclonal antibodies, and so have become darlings of pharma, particularly in cancer drug discovery.

A camels streamlined nanobodies arose from a mutation that removed the hinges that connect the Y-shaped arms of more conventional antibodies. Sometimes a mutation is a good thing!

Further infection protection comes from the milk protein lactoferrin, which fights hepatitis C.

Tolerating High Blood Sugar

A camel-herding people in India, the Raika, drink camel milk and dont get diabetes. Thats because camels tolerate high blood glucose levels, and some of that ability seeps into their milk.

P. Agrawal, at the SP Medical College, Bikaner, India and colleagues have conducted clinical trialsthat show that camel milk decreases blood glucose and hemoglobin A1c (a three-month-measure of blood glucose), and, in people with type 1 diabetes, reduces the insulin requirement by up to 30 percent .

How can camels have high blood sugar yet low HbA1C? In most animals, the beta chains of hemoglobin bind glucose at several points, upping HbA1C. This doesnt happen in camels. If glucose binding to hemoglobin in us is like Velcro, then in camels, its like contact between a boot and slippery ice.

Conserving Water

Milk requires water, and camels are masters at conserving it. A self-contained cooling system, as Christina describes it, cycles body water from a camels nostrils to its mouth. The multi-layered eyelids and double row of eyelashes keep out blowing sand. Their unique oval blood cells compress as camels safely dehydrate, then swell up again as they refill with water, keeping their blood flowing in extreme conditions.

Camels dont dry out in the desert, as we would, thanks to variants of the genes that encode the cytochrome P450 (CYP) enzymes. They enable camels to resorb lots of water while tolerating high salt conditions, without their blood pressure spiking. Their kidneys are keenly attuned to taking back water.

Camel milk is also high in the calming neurotransmitter GABA, low in lactose, and has more vitamin C than cows milk.

Beyond Milk

The astonishing adaptations of the camel arent restricted to its milk. Here are a few more that have their roots in the animals genes.

Variations on the Camel Theme

About 94% of the worlds 35 million camels are the domesticated, one-humped dromedaries (Camelus dromedaries) of northern and eastern Africa, the Arabian Peninsula, and southwest Asia. A feral branch lives in Australia. Wild dromedaries are extinct and are in a separate genus, Camelops hesternus. They dwelled in western North America.

About 2 million two-humped domesticated Bactrian (Camelus bactrianus) camels live on the steppes of central Asia, and each weighs about 1,000 pounds. Fewer than 100 wild Bactrian camels remain; they split from a shared ancestor about 700,000 years ago. Today they live in Mongolia and in northwest Chinas Xinjiang Province, in an area that was a nuclear testing site for 45 years. In 2008 the wild Bactrians were designated a distinct species, Camelus ferus.

When bactrian and dromedary camels interbreed, most offspring have one hump, some with a dip in the middle.

Camel Genomics

Camel genomes are remarkably diverse with many mutations, perhaps because people havent controlled their breeding. Doing so is challenging.

The jelly-like consistency of camel semen complicates both freezing and using artificial insemination. Still, researchers from Oman and France recently published a report about possible genetic improvements: selecting for traits that ease of using milking machines, provide resistance to infections, improve racing ability, and enhance beauty. Camels are, after all, gorgeous creatures.

The first camel genome sequence, published in 2012, revealed 20,821 genes splayed out among 37 chromosome pairs. Some 2,730 genes have evolved faster in camels than in their cattle relatives, many involved in carbohydrate and lipid metabolism. Perhaps the unusual variants contribute to the camels ability to conserve water.

Researchers from Kuwait University report in PLOS Onethat they analyzed DNA from the blood, spit, and hair of nine camels, concluding that tail hair follicle DNA is the best tissue source to create a biobank.The International Camel Consortium for Genetic Improvement and Conservation promotes camel genetic conservation.

Bring on the Camel Fro-Yo!

The milk isnt cheap. Camel Milk Cooplists $36.99 for a weeks supply. And as Christinas book explains, theres little to no incentive to conduct a clinical trial or to attempt to replicate natures magical mix of milk ingredients. Camel Crazy includes a users guide and directory of global sources.

The milk is available in liquid, frozen, and powdered form. Camel-milk-containing products include skin cream, cheeses, ice cream pops, chocolate milk, and a delectable-looking sweet called barfi, which means snow in Persian (not vomit).

When will camel milk come to Starbucks?

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Camel Milk and Autism: Connecting the Genetic Dots | DNA Science Blog - PLoS Blogs

Global Automated Biochemistry Analyzers Market 2019 by Manufacturers, Regions, Type and Application, Forecast to 2025 – The Industry Press Releases

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This is one place on Earth where no life can exist – WBAP News/Talk

Life exists in extreme environments on Earth, from arid deserts and frozen tundras to thermal, toxic vents in the deepest reaches of the ocean floor. But it cant exist on every inch of the planet and scientists have discovered a place in Ethiopia where life cant find a way, according to a new study.

In contrast with previous research, scientists conducted multiple tests and found that there is no life, not even microorganisms, in Dallol. One of Earths most extreme environments, Dallol is incredibly hot, salty and acidic. Its ponds extend across a volcanic crater, in the Ethiopian Danakil depression, filled with salt, toxic gases and boiling water in response to extreme hydrothermal activity.

Even in winter, daytime temperatures can exceed 113 degrees Fahrenheit. Some of the hyper acidic and saline pools have negative pH values.

The findings published Friday in the journal Nature Ecology & Evolution.

After analysing many more samples than in previous works, with adequate controls so as not to contaminate them and a well-calibrated methodology, we have verified that theres no microbial life in these salty, hot and hyperacid pools or in the adjacent magnesium-rich brine lakes, said Purificacin Lpez Garca, study author and biologist at the French National Centre for Scientific Research.

However, outside of the ponds, its a different story.

What does exist is a great diversity of halophilic archaea (a type of primitive salt-loving microorganisms) in the desert and the saline canyons around the hydrothermal site, but neither in the hyperacid and hypersaline pools themselves, nor in the so-called Black and Yellow lakes of Dallol, where magnesium abounds, said Lpez Garca. And all this despite the fact that microbial dispersion in this area, due to the wind and to human visitors, is intense.

The researchers performed mass sequencing of genetic markers meant to find and classify any microorganisms that may be present, as well as cultures to find microbes, cytometry for detecting individual cells, brine chemical analysis and electron microscopy combined with X-ray spectroscopy.

At first glance, minerals rich in silica may mimic microbial cells, the researchers said. But their analysis revealed the difference.

In other studies, apart from the possible contamination of samples with archaea from adjacent lands, these mineral particles may have been interpreted as fossilized cells, when in reality they form spontaneously in the brines, even though there is no life, Lpez Garca said.

Scientists have used evidence of life in extreme environments on Earth as an analog for the conditions where life may exist on other planets in our solar system or beyond it. The researchers warned that in this case, just because there is liquid water present or because something resembles cells or other biological aspects beneath a microscope, does not mean there is life present.

Our study presents evidence that there are places on the Earths surface, such as the Dallol pools, which are sterile even though they contain liquid water, Lpez Garca said.

The Dallol ponds actually prevent life from forming because they contain chemical barriers like chaotropic magnesium salts that help break down hydrogen. Combined with the salty, acidic and hot environment, life receives no encouragement in the pools.

We would not expect to find life forms in similar environments on other planets, at least not based on a biochemistry similar to terrestrial biochemistry, said Lpez Garca.

The researchers will continue studying the pools to determine more about the limits of life.

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Semester in the sun – Gazette

Part of a special feature highlighting the student voice, student experience and the range of student supports and opportunities available at Memorial.

Nov. 22, 2019

Amelia Lacey will likely spend some time studying on an Aloha State beach during the winter 2020 semester.

The fourth-year biochemistry (nutrition) major and St. Johns resident will study at the University of Hawaii at Mnoa as one of 20 top Canadian students receiving a Killam Fellowship from Fulbright Canada this year.

The scholarship program allows exceptional undergraduate students to participate in a bi-national academic exchange between Canada and the United States.

I wont be able to come home for a visit while Im there, and Ive never lived away from home for that long before, so its definitely going to be a new experience for me, said Ms. Lacey about the upcoming experience.

But, Im looking forward to all of the adventurous activities there and I hope to explore the islands of Hawaii as much as I can.

Ms. Lacey says her success in receiving the fellowship is an example of what can happen when you dont give up. She applied for the Killam Fellowship twice before being successful this year let alone in the highly coveted Paradise of the Pacific spot.

You have to choose the university that best matches the courses you need to take for your degree, and Hawaii has a great nutrition program, said Ms. Lacey. I recognized that and highlighted it in my application. They also offer a lot of courses we dont have at Memorial, so Im hoping to take a few courses I wouldnt otherwise get to take.

Photo: Submitted

In September she travelled to Ottawa, Ont., for an orientation session. There, she met the other Canadian and American Killam fellows, along with the American Fulbright students and scholars who are studying and conducting research in Canada this year. This spring Ms. Lacey will gather with them once again for a seminar in Washington, D.C.

It was great to meet people who were very different from me, but who also had similar values, she continued. I only spent three days with them, but were still talking regularly. I know well be keeping in touch.

It showed her, as many past Memorial fellowship recipients have found, that the Killam network is a strong one.

Once you get a Killam, youre considered a Killam fellow for life. So, you will continue to get emails, event invitations and other opportunities from them. It certainly opens up doors, thats for sure.

A focus on health and well-being has guided Ms. Laceys academic and personal pursuits.

She has been awarded several research awards, including three MUCEPs, a Natural Sciences and Engineering Research Council of Canada Undergraduate Student Research Award and a Faculty of Medicine Summer Undergraduate Research Award.

A Deans List student for the past three years, she has also been supported by several generous scholarships. Currently, she is the vice-president (social) for the Biochemistry Society, executive director of communications with the Women in Science and Engineering Undergraduate Society and a member of the Quintessential Vocal Ensemble. Past volunteer work with Global Brigades in Honduras also inspired Ms. Lacey to become more involved in global health.

Kelly Foss is a communications advisor with the Faculty of Science. She can be reached at kfoss@mun.ca.

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Scientists unravel mysteries of cells’ whiplike extensions | The Source – Washington University in St. Louis Newsroom

Cilia, or flagella whiplike appendages on cells perform diverse tasks required to keep the body healthy. When cilia malfunction, the consequences can be devastating, causing a range of problems, from blindness, to lung and kidney diseases, to congenital heart defects. Now, scientists have revealed the firstdetailed lookat the inner structure of cilia.

The newly revealed structure offers a starting point to begin exploring how cilia are assembled during development, how they are maintained over a cells life span, and how they might become dysfunctional if some of the cogs in these complex molecular machines are mutated or missing. The structure of these microscopic molecular machines common to cells in organisms from algae to people potentially will answer questions about human health and disease.

The research, by investigators at Washington University School of Medicine in St. Louis and Harvard Medical School, was published recently in the journal Cell.

This new study is exciting because it fills in a lot of missing information about the structure of cilia, said senior authorRui Zhang, assistant professor of biochemistry and molecular biophysics at Washington University. When cilia dont work properly, bad things happen. We need to know details of the structure in order to develop treatments for diseases, or strategies to prevent the developmental defects that can occur in the early embryo if the cilia are not functioning as they should.

In the respiratory tract, cilia move mucus and protect against viral and bacterial illnesses. In the reproductive tract, they propel sperm to fertilize an egg. Cilia also perform vital tasks in the brain, the kidney, the pancreas and in bone growth. And in the earliest stages of development, the rotational motion of specialized cilia in the embryo defines the bodys left-right asymmetry and where organs are placed. Without properly functioning cilia, the heart may not end up on the left side, where it should be, and it may not function properly.

Cilia are implicated in multiple human disorders, including polycystic kidney disease, which affects some 600,000 Americans and requires dialysis; primary ciliary dyskinesia, which causes chronic lung disease, misplaced organs and infertility; Bardet-Biedl syndrome, which causes patients to become blind in childhood and leads to diabetes, kidney disease and extreme obesity; and many congenital heart defects, which occur when left-right asymmetry goes awry and require complex surgeries to repair.

In the new study, the researchers used a technique called single particle cryo-electron microscopy to get a first look at 33 specific proteins arranged inside cilia within structures called ciliary microtubule doublets in a strict repeating pattern.

Before this work, everyone assumed these proteins inside cilia just stabilize the structure, which is true for a subset of the proteins, especially when you consider the forces produced by the continuous beating of the cilia, Zhang said. But based on how they are arranged inside this structure, we believe these proteins are doing many more things.

Since many of the proteins protrude through the cilia, Zhang and his colleagues speculate that they may allow for communication between the inside and the outside of the ciliary microtubule doublets; govern the function of enzymes that make important biochemical reactions possible; and sense changes in the calcium concentration of the environment, which plays a role in triggering the cilia to beat.

Among the proteins identified, five are associated with diseases that have been studied in mice and people, said co-authorSusan K. Dutcher, professor of genetics at Washington University. But until now, no one knew that these proteins were found inside cilia. We are just beginning to understand their roles in normal and disease states.

The researchers studied cilia in a type of algae calledChlamydomonas reinhardtii, which are single-celled organisms that have cilia structurally and biochemically similar to those of more complex organisms, including people. One question Dutcher is interested in answering is how the proteins making up cilia structure govern the type of motion that the cilia perform. The cilia of single-celledC. reinhardtiiare capable of more than one type of motion.

In some situations, the cilia are doing what you might consider a breast stroke, Dutcher said. In others, the motion is more of an S-shaped wave. The cilia of many cells in mammals can only produce one of these motions. But the single-celledC. reinhardtii, perhaps to help it adapt to its environment, can switch between them. Thats why were studying algae at a medical school the genetic problems we can study in the cilia of these organisms are similar to the ones that can occur in people, often with devastating consequences.

Zhang, Dutcher and their colleagues have plans to use the latest techniques of cryo-electron microscopy to study theChlamydomonas mutants of each of the 33 proteins inside cilia to seek answers to many questions that have arisen from this new and detailed knowledge of the structure.

Originally published by the School of Medicine

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Scientists unravel mysteries of cells' whiplike extensions | The Source - Washington University in St. Louis Newsroom

How the Great Depression Helped Spare Wild Turkeys From Extinction – History

Before European settlers arrived in North America, there were millions of wild turkeys spread across what are now 39 U.S. states. But by the 1930s, wild turkeys had disappeared from at least 20 states and their total population had dropped to 30,000.

Over the next few decades, a series of reforms, conservation efforts and demographic changes helped bring wild turkeys back from the brink of extinctionmaking them one of the United States biggest wildlife success stories.

Wild turkey populations started declining in the 17th century as Euorpean colonists hunted them and displaced their habitats. By the time President Abraham Lincoln made Thanksgiving an official U.S. holiday in 1863, wild turkeys had disappeared completely from Connecticut, Vermont, New York and Massachusetts. Within a couple decades, they also disappeared from states farther west like Kansas, South Dakota, Ohio, Nebraska and Wisconsin. In an 1884 issue of Harpers Weekly, one writer predicted wild turkeys would soon become as extinct as the dodo.

Illustration for a 1908 Thanksgiving postcard.

Jim Heimann Collection/Getty Images

Wild turkeys, or Meleagris gallopavo, were not the only native U.S. species that were in danger. By 1889, there were only 541 American bison left. By the 1930s, when wild turkey populations hit their lowest, the passenger pigeon had already become extinct. The crisis in native species populations galvanized conservationists, who helped pass the Federal Aid in Wildlife Restoration Act of 1937, also known as the Pittman-Robertson Act. This act placed a tax on hunting guns and ammunition to pay for wildlife restoration efforts.

The 1930s also saw a major shift among the U.S. population that would end up benefiting wild turkeys, albeit unwittingly. The Great Depression forced many families to abandon their farms, leaving the land open for wild turkeys to expand into. As these farms slowly reverted to native grasses, shrubs, and trees, wild turkey habitat began to emerge, according to the National Wild Turkey Federations website.

READ MORE: What Life Was Like in the Great Depression

E. Donnall Thomas Jr., author of How Sportsmen Saved the World: The Unsung Conservation Effort of Hunters and Anglers, says the decline of cotton farms in particular may have helped wild turkeys rebound in states like Texas.

Thomas father, who won the Nobel Prize in physiology or medicine in 1990, recalls that there was nothing but raccoons, opossums and other small game to hunt growing up in Mart, Texas during the 1930s. But when Thomas traveled back to the area with his father around the 1960s, his father was absolutely astounded to see how wild turkey had flourished.

When he grew up there, all the land was planted in cotton, Thomas says. Cotton is terrible wildlife habitatnothing can eat it, it doesnt provide good escape coverand he was quite sure thats the reason that species like deer and turkeys werent there during the 1930s. When we went back, cotton was gone.

These changes in the 1930s provided good habitats for wild turkeys. However, their numbers didnt really start to rebound until the 1950s, because until then, conservationists couldnt figure out a good way to relocate wild turkeys to these habitats.

The conservation movement started bringing various species back around the turn of the century, says Jim Sterba, author of Nature Wars: The Incredible Story of How Wildlife Comebacks Turned Backyards Into Battlegrounds. But wild turkeys were [one of] the last species that got brought back because they couldnt figure out how to do it.

Finally, in the 1950s, conservationists realized they could safely relocate wild turkeys with rocket or cannon nets. These are nets that shoot out and trap animals. Because of relocation efforts, there are now millions of wild turkeys across dozens of states.

A wild turkey spotted along the highway in 1975, believed to be one of several wild turkeys once planted along the South Platte River in northeastern Colorado.

John G. White/The Denver Post/Getty Images

Thomas speculates that one of the reasons wild turkeys are able to thrive in Montana, the state he lives in, is because of a change in ranching habits that also took place around the 1930s. During this time, cattle ranchers began to bring their cows into feedlots near their ranch houses during the winter. The change in ranching habits had absolutely nothing to do with turkeys, but ended up providing them with a reliable food source to survive the winter.

Turkeys can eat cow manure, Thomas explains. They love to dig through manure, pick out undigested seeds and bits of corn and whatever the cattle have been eating In the winter, when theres snow, its not unusual to see 100 wild turkeys gathered around at a little feedlot next to a ranch building.

Although the food source is most important during the winter, when cattle are concentrated in one area, wild turkeys also eat cow manure in warmer seasons when the cattle are more spread out. Its very, very common to see wild turkeys in the spring flipping over cow turds, he says, adding, that food source wouldnt be here if the cattle werent here.

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How the Great Depression Helped Spare Wild Turkeys From Extinction - History

2019 Outstanding Teaching Award | News, Sports, Jobs – The Review

Daniel Dankovich

EAST LIVERPOOL Dr. Daniel Dankovich, lecturer-biology at Kent State East Liverpool, received the 2019 Outstanding Teaching Award from the University Teaching Council at Kent State. This is the universitys highest honor for nontenure-track faculty.

Dankovich began teaching part-time for Kent State in 2010, teaching on the Salem, Twinsburg, Burton and East Liverpool campuses. He became a full time faculty member on the East Liverpool Campus in 2018, teaching human biology and anatomy/physiology.

Now living in Canfield, Dankovich graduated from Austintown Fitch High School in 1980. He received two bachelors degrees (in biology and psychology) from the Ohio State University in 1984, before earning his Doctor of Chiropractic degree from the National College of Chiropractic in 1989.

Dan is not satisfied with simply being really good, noted Dr. David Dees, dean and CAO for the Kent State Columbiana County campuses. Over the last several years, he has dedicated himself to finding even better ways to teach. Dan has dedicated himself to focusing more on student learning, rather than just his lecturing style.

Individuals who are the best at their profession are never satisfied with just being good. These individuals are on a path to find greatness and Dan represents this in the area of college teaching.

Dankovich also took the initiative to create a food pantry for students on the East Liverpool Campus and created a student leadership council that helps manage the food distributions.

Like all great educators, Dr. Dankovich understands that being a professor is about more than just what goes on in the classroom, Dees continued. Dan always volunteers and/or takes the lead on important projects. His passion for helping students is in everything he does and he role models for his colleagues the best practices in higher education.

The Outstanding Teaching Award is presented annually to faculty members who consistently showcase astounding skills in classroom teaching. Award winners are formally recognized at the annual University Teaching Council Conference on the Kent Campus.

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2019 Outstanding Teaching Award | News, Sports, Jobs - The Review

Classroom availability limited – Eye of the Tiger

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Science teacher Jeffery Underwood with a student from his first period class. Due to limited facilities, Weiss must use Underwoods classroom during class labs.

(NICOLE KHUDYAKOV / EYE OF THE TIGER)

Science teacher Jeffery Underwood with a student from his first period class. Due to limited facilities, Weiss must use Underwoods classroom during class labs.

(NICOLE KHUDYAKOV / EYE OF THE TIGER)

(NICOLE KHUDYAKOV / EYE OF THE TIGER)

Science teacher Jeffery Underwood with a student from his first period class. Due to limited facilities, Weiss must use Underwoods classroom during class labs.

One week prior to the start of the 2018-2019 school year, physiology teacher Oliver Weiss learned he would now be teaching fourth period physiology, a lab-based science course, in a room that lacked the necessary materials found in a traditionally equipped lab-classroom.

This is part of a larger trend where students enrollment in lab-based science courses outnumber available lab classrooms, requiring teachers to share.

We have more science teachers than we have classrooms, so we know theres going to be some kind of shifting around, Weiss said. Its just a matter of how do we do it in such a way that its equitable for everybody.

According to the master schedule developed last spring, Weiss was initially set to teach the course in Darcee Durhams classroom, which has lab equipment available. However, last minute scheduling changes initiated the move to history teacher Carol Crabtrees social science classroom, which lacks the space, chemical showers, sinks, outlets for microscopes, and other basic equipment necessary to perform dissections and labs.

(MICHAEL LEEMAN / EYE OF THE TIGER)Science teacher Oliver Weiss helps a student in his fourth period physiology class.

Crabtree was initially informed of this change a few days prior to the start of the school term through her colleagues. Assistant principal Matt Pipitone later confirmed the switch.

Im going to assume it was a last minute decision, because I was told at the last minute, Crabtree said.

The unplanned change meant this was the first time in his teaching career that Weiss wouldnt have immediate access to a science classrooms with lab equipment for his physiology course.

In order to accommodate for the lack of space and equipment, Weiss has been altering his curriculum plans to adhere to his new constraints.

Thus far, this includes adjusting labs and class projects to occur outside and scheduling to borrow other science teachers lab classrooms if necessary.

His flexibility extends to AP environmental science Jeffery Underwood, who is willing to lend out his room for dissections and other necessary physiology labs that are meant to be at the core of the curriculum, thereby simultaneously displacing his own students from their fourth period classroom.

(NICOLE KHUDYAKOV / EYE OF THE TIGER)Science teacher Jeffery Underwood with a student from his first period class. Due to limited facilities, Weiss must use Underwoods classroom during class labs.

Underwoods own experience with mobile classrooms taught him that there are budgetary and spacial limits that force RHS science teachers to continue sharing lab-spaces.

Outfitting a classroom is very expensive, Underwood said. For science classrooms, its expensive to make sure that youve got your water and your gas and all those things that are needed to teach a science class.

On days when physiology stays in room 903, Crabtree, who no longer has full access to her classroom during her fourth period prep, relegates herself to the hallway in the lower level of the 900 west building. The teacher nook, located near the bathrooms, faces foot traffic and noise from in-session classes. It is also one of the few available teacher work spaces with a computer, which Crabtree uses to more comfortably complete her work.

Obviously its not an ideal situation, but its really the only place [to get work done], Crabtree said. The inconvenience is much worse for science teachers who are being displaced.

Crabtree frequently sees other teachers working under similar circumstances in the hallway throughout the day.

As physics teachers, Leslie Kalmer and JoAnne Cook also share classrooms with one another, though their shared subject allows them to have constant access to all equipment necessary for their labs, demonstrations and other class-wide projects.

Sharing classrooms is cumbersome, Cook said. [But] I would rather share a classroom because I think its better for the students.Kalmer believes that even Weiss willingness to be flexible in his lesson plans isnt enough to fully counteract the absence of basic equipment.

He was put in a situation that is very difficult that I wouldnt want to do, Kalmer said. Having to teach a science class, especially so lab-oriented, is almost impossible to do. He cant possibly do it the way he wants.

Weiss plans his schedule around his labs and class-wide activities. His ultimate goal is to avoid interfering with his lessons plans too drastically and noticeably impacting the students learning experience.

Im just going to focus on what I can do for my students instead of what I cant do, Weiss said.

Despite his efforts, students are aware of the limitations of their classroom. Senior Julia Barnes feels restricted by the lack of readily available equipment.

It sucks, Barnes said. I feel like we arent getting as much out of our lessons as we normally would.

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Classroom availability limited - Eye of the Tiger

Managing the SIHD Patient in a Post-ISCHEMIA World – Medscape

This transcript has been edited for clarity.

Michelle L. O'Donoghue, MD, MPH: Hi. I'm Dr Michelle O'Donoghue, reporting from the American Heart Association Scientific Sessions in Philadelphia. Joining me today is Dr Jacqueline Tamis-Holland from Mt Sinai in New York, as well as Dr Rasha Al-Lamee from Imperial College in London. We're going to be talking about the ISCHEMIA trial. Obviously there has been a lot of talk about the results of this study. Perhaps you'd like to lead off and walk us through the study design and the top-line findings.

Rasha K. Al-Lamee, MBBS, MA, PhD: This was a landmark international study with over 38 countries taking part. For study design, they looked at patients with stable coronary artery disease who had moderate to severe ischemia as assessed by exercise testing, nuclear scanning, stress echocardiography, and MRI. Patients went on to have a CT to rule out left main stem in particular and were randomized to either an invasive or conservative arm, with optimal medical therapy given to both groups. This was an unblinded trial, so patients were aware of their treatment allocation as were the physicians. They evaluated hard endpoints between the two groups and then also symptomatic secondary endpoints. The primary outcome included death, myocardial infarction (MI), hospitalization for unstable angina, resuscitated cardiac arrest, and hospitalization for heart failure.

O'Donoghue: I think many people thought about ISCHEMIA as a "sequel" to the COURAGE trial. You hit on a very important point that within the ISCHEMIA cohort, everybody did undergo a coronary CT angiography (CTA), so you did have a sense of their coronary anatomy prior to their entering the study. Similarly with COURAGE, the patient population had all undergone coronary angiography before being randomized.

Al-Lamee: What really stood out for this trial was the fact that they randomized them ahead of a coronary angiogram. Hopefully we got away from one of the criticisms that COURAGE received, which was that patients with proximal left anterior descending (LAD) disease would never make it to trial; they would never be randomized, so there was some selection bias. I think some of that was minimized by this very groundbreaking trial design.

O'Donoghue: What do you view as the top-line results that you want viewers to walk away with?

Jacqueline E. Tamis-Holland, MD: The most important thing to me is the fact that their mortality was incredibly low and that the event rate was relatively low. These patients, with the exception of those who might have left main disease, have a relatively good outcome regardless of what we do in the initial setting. I'm comfortable saying that we can take our time deciding what we want to do. We don't have to rush to the cath lab that evening after their stress test, and we can have a conversation with them.

O'Donoghue: I was really quite struck by the fact that this was a patient population where a lot of them had proximal LAD diseasethings that would give us pause in a clinical setting. Yet the event rate was quite low. Do we think that optimal medical therapy is what is making a big difference in the backdrop for these patients?

Tamis-Holland: I definitely think it's helpingno doubt about it. It makes a difference in our outcome compared to what we used to do many years ago, where you saw different degrees of aggressiveness. It does help contribute to that.

Al-Lamee: The investigators published a paper in Circulation: Cardiovascular Quality and Outcomes a week ago looking at the level to which they delivered that medical therapy. They tried very hard to deliver optimal medical therapy. Patients were judged in terms of their adherence; nonadherent patients were not even included in the trial. They tried very hard to get to target on lipids and to target on blood pressure, and also give them some pretty decent antianginal therapy, which we have not necessarily seen in some of the trials that preceded it and we're not so good at doing in clinical practice.

Tamis-Holland: Although the percentage of patients who actually were optimal was really not that high.

Al-Lamee: And they didn't change so much within the trial. But it's hard to do that with such an international trial. Even at the point when they realized that some sites were not going to target, they went back out to those sites and tried to reeducate them to do some extra strategies to make it better.

O'Donoghue: Perhaps even more remarkable is that even though medical therapy was not fully optimized, there still was not any clear benefit of stenting these patients in terms of mortality reduction or net MI reduction.

Al-Lamee: These stable patients probably have a very different disease than the acute patients that come to our cath labs. We very rarely have patients for whom we perform primary percutaneous coronary intervention (PCI) who tell us they have had angina over the past few weeks. Often this is the first time they presented with it. There must be a very different disease process going on between these two groups.

O'Donoghue: It's always important to underscore that this was a stable patient population. There was discussion that when you stent a patient, there seems to be a little bit of early hazard in terms of earlier risk for MI, many of those probably periprocedural. And a little bit of a benefit was emerging late in terms of MI reduction on the late side. But this was overall sort of offset by that early hazard.

Tamis-Holland: We still have to wait to see the manuscript regarding the clinical relevance, although they met the criteria and they had very strict criteria for postprocedure MI. I would be curious to know how clinically relevant those postprocedure MIs were. More importantly, I would like to know more about the spontaneous MIs, which were clearly higher in the group of patients who got conservative care.

Al-Lamee: Once we saw those curves cross, seeing the 5-year data is going to be key to see whether things change and we suddenly have a reversal in the primary endpoints essentially over time.

O'Donoghue: Perhaps you'd like to talk about the symptomatology piece and whether you feel that ISCHEMIA demonstrated a reduction in overall anginal symptoms. How do we put that in the context of ORBITA?

Al-Lamee: I guess the good-news story from ISCHEMIA is that there does seem to be a significant improvement in symptoms for those patients who have the invasive strategy. I do caveat that with the fact that this was an unblinded trialbut the follow-up goes out to 36 months. You would expect placebo to attenuate over time, although in the later myocardial revascularization trials, we saw that the placebo effect can last out to 30 months. That is hard to tell. Having said that, symptom improvement in terms of freedom from angina was actually quite similar to ORBITA. In our secondary analysis, patients were 20% more likely to have freedom from angina if they got angioplasty. And there, too, the rates were quite similar. They do kind of tie up. We recently published our stress echostratified analysis looking at all patients stratified on the basis of their burden of stress echo ischemia. Patients with the highest stress echo ischemia at pre-randomization benefited the most in terms of symptom reduction on angina frequency with PCI versus placebo. I would say that the two studies are quite in parallel.

O'Donoghue: As I think back to COURAGE, it seemed like the improvement in symptoms started to wane over time. It started to close between the treatment arms.

Tamis-Holland: BARI 2D showed the same thingthat initial improvement was seen and then over time they converged. I feel very strongly that it is a definite improvement in symptoms as opposed to a placebo because of the fact that the two trials similar to this did show an attenuation in the difference in ischemia and it did stay out to 3 years.

Al-Lamee: Symptoms are important to our patients, right? They want quality-of-life differences. Yes, some of that may have been placebo, but there is probably some definitive improvement.

O'Donoghue: The point made yesterday during the discussion was that ISCHEMIA reassures us that we can go that route for a patient who is appropriate for initial medical management. If they continue to have intractable symptoms or it's really interfering with their quality of life, ISCHEMIA also gives us some reassurance that there is no clear net harm from going ahead and stenting patients in that situation. There might be the early hazard, and that is a conversation we need to have with our patients beforehand. But nonetheless, it ends up being net-neutral in terms of the hard outcomes of death or risk for MI.

Tamis-Holland: It reflects back to where we started, which is that regardless of the degree of ischemia, you can comfortably say that if you are taking care of a patient, you are doing it to try to improve their quality of life or symptoms. So if you need to do a revascularization procedure to help make them feel better, it's still fine. It was fine before [ISCHEMIA] and it's still fine.

Al-Lamee: Sometimes I use an analogy with orthopedic surgery: You don't do a total hip replacement or knee replacement to save someone's life; you do it to improve their quality of life. And those patients still want that procedure. Maybe that is the place for angioplasty in stable coronary artery disease.

Tamis-Holland: But it's surgery too.

Al-Lamee: Absolutely. That is key. You make a great point. A quarter of these patients had coronary artery bypass grafting (CABG). It's revascularization as a whole, I suppose.

O'Donoghue: It's not just a stenting trial. It's a little bit different from COURAGE that way because coronary anatomy was not known upfront.

O'Donoghue: Let's say that people watching this are thinking, How am I going to evaluate the next patient who comes in to my clinic who has been having anginal symptoms? Maybe you do or do not yet have a stress test. Even though it was part of ISCHEMIA, is the stress test going to modify your thinking, necessarily? And do we need to have knowledge of their coronary anatomy once you're aware of the fact that they have moderate to severe ischemia in any given distribution? When do we say, "I'll give medical therapy; I don't need to know any more." Or do we need to investigate a little bit further?

Tamis-Holland: Before we can extrapolate the results of the trial to our patient in the office who comes to us with an abnormal stress test, I think we do need to define the anatomy, whether by protocol with CT scan or whether they are taken to the lab to understand whether this patient with this degree of ischemia would have met the criteria to be enrolled. Otherwise, if they had severe left main, they would not have been included.

I think that is important, but I'm also not really sure. I'm curious to know what your feelings are, of where you think the role of stress testing versus just defining the anatomy comes in. I still feel that functional testing is sometimes helpful in those 75-year-olds who are going to have incidental coronary disease anyway. What do you do with that?

Al-Lamee: The pathway in the United Kingdom is really quite different to the United States. Our gatekeeper has become the CT. This was National Institute for Health and Care Excellence (NICE) guidance a while ago. In fact, when I do the rapid-access chest pain clinic, the majority of patients have a CT.

Tamis-Holland: If they are abnormal, do you then follow it with a functional test?

Al-Lamee: I check their CTs, and if they have very significant symptoms which I think are cardiac, the predominant strategy has been to get these guys to the lab. Then I go for coronary angiogram, and at that point we do invasive physiology on the majority.

Tamis-Holland: What if they are 75 years old and they get short of breath or tired after two blocks? Not really angina symptoms.

Al-Lamee: Or you see kind of moderate disease on CT. For those patients I do functional testing. But the predominant strategy has been CT for us. And then when we see very significant disease, it's very heavily calcified and you can't define it any further, or it may be triple vessel or left main, we send those patients straight to the lab. I don't know if that is the right strategy, but that has been our strategy.

O'Donoghue: In some ways, you're now exposing them to double the contrast load and extra radiation. I suppose you could argue certainly for the three-vessel disease or left main, where it's going to definitively change your management. But what if you saw a 90% proximal LAD lesion on the coronary CTA? Would you feel the need to bring them back to the cath lab to confirm that?

Al-Lamee: I find it really tricky. We had a bunch of patients with proximal LADs in ORBITA and they clearly had a load in ISCHEMIA too. I still feel like that 50-year-old guy with that proximal LAD wants that fixed, and I want to fix it. The reality is that we don't necessarily have the evidence that you change that person's hard outcomes. I still find it uncomfortable to leave those patients alone. I don't know what to say.

O'Donoghue: A lot of interventional cardiologists would say the same thing.

Al-Lamee: I ran ORBITA and I'm saying that. To be honest, I have become much more conservative in patients with circumflex lesions and right coronary lesions, and I often start with medicine and see where it goes.

Tamis-Holland: I would agree with that. I'm still perplexed about the severe triple or the very proximal LAD. I would like to really see a drill-down of the data. I know that they said there was no difference. I believe that one of the interactions was proximal LAD versus not, and there was no difference.

I'd be especially curious about the breakdown of the CABG patients to see whether there was a difference in outcome between patients who had enough disease to undergo CABG compared with those whose disease just required PCI.

Al-Lamee: Definitely. And also even for the quality-of-life data. My sense is that the quality of life is quite different for those having had a CABG versus PCI. I would be interested to see if CABG patients have exactly the same quality-of-life improvement or whether having had that big procedure makes a difference going forward.

O'Donoghue: You raise concerns about the "oculostenotic reflex" when they are in the cath lab. On some level, the beauty of doing a coronary CTA is that it might make it easier to make a decision or have a conversation with the patient first before thinking about stenting them.

Al-Lamee: It is important when we discuss it with them now that we do not scare the patient. In the United Kingdom there is a waiting list for coronary angiography, and sometimes you have these patients asking whether they should be paying for this to happen privately so they can have it quickly. I don't think there's any need for that now. I think we can calm them down. We can say it's okay to get them on the right meds and then wait until the cath to see.

O'Donoghue: One of the comments you are making about bringing them to the cath lab is about getting a better sense of the severity of the stenosis. One topic that has been much discussed after ORBITA was the concept of fractional flow reserve (FFR). How much should FFR and instantaneous wave-free ratio (iFR) be guiding our decision-making in this situation? What are your thoughts?

Al-Lamee: It's tricky because the problem with the invasive physiology data and FFR data is that the ischemic threshold for FFR was much lower than the critical threshold we are now using; 0.75 was the initial threshold. And when we looked at the ORBITA dataset in terms of FFR and iFR stratification, we found a really distinct relationship between FFR and iFR burden at pre-randomization. The lower the FFR, the lower the iFR, the more likely it was that angioplasty versus placebo would have an impact on stress echo ischemia or reduction ischemia. But we didn't find any impact on symptoms or exercise time. That may be because we were underpowered. It may also be over time because from our stress echo dataset, we've seen something different. We've seen a relationship between stress echo and symptoms. I'm starting to wonder if the FFR and iFR really tell us about the burden of disease and myocardial mass that is actually affected by that stenosis. Maybe an iFR of 0.4 in the circumflex is quite a different thing to an iFR of 0.4 in an LAD. So, I don't know. I'm still using physiology a lot and I will continue to use physiology a lot because I believe the data. I believe that it's important. But I am slightly starting to change my threshold of treatment. And I don't suddenly think that with a 0.79 on FFR I need to get on and treat. I'm trying to think about the patient more.

Tamis-Holland: I agree. To be honest with you, most of the data on FFR is really for the intermediate stenosis. It's definitely helpful in the symptomatic patient with intermediate disease. For the asymptomatic patient with severe disease, I'm not sure I would necessarily use that entirely as a marker of whether I intervene or not, especially now. So I take them to the lab or it's okay to intervene because the FAME study would show a benefit with an FFR that is abnormal. I don't know if I would have that same approach. In fact, the FAME study only included symptomatic patients. I'd be careful about asymptomatic patients.

Al-Lamee: The other thing with FAME 2 for me is that those urgent revascularization rates in FAME 2 have never been replicated in another trial again. They had urgent revascularization rates of over 20%. That is a little bit crazy to me because when we see the hospitalization for unstable angina in ISCHEMIA, it's much lower, and in ORBITA we didn't have these patients suddenly presenting with acute coronary syndrome or needing to be taken to the cath lab. It didn't happen. So, it speaks likely to the design of the trial, I think. And since it's not been reproducible, I'm a bit wary about FAME 2.

O'Donoghue: There was no clear indication that death or MI is modified.

Tamis-Holland: It's entirely driven by revascularization.

O'Donoghue: Which many would consider to be a softer outcome.

Tamis-Holland: Particularly when a physician and patient know of a lesion that has never been taken care of.

Al-Lamee: One thing that I was really pleased with was how [the ISCHEMIA investigators] defined hospitalization for unstable angina and they adjudicated it. You had to have more than just chest pain. You had to have ECG changes, you had to have troponin checked. They didn't do this in FAME 2, which meant that the vast majority of the revascularizations just happened for a chest pain presentation, troponin negative, ECG negative. And that could have been affected by unblinding, potentially.

O'Donoghue: One observation I heard somebody make yesterday was that, not surprisingly, for those patients who ended up having revascularization, at least PCI, there was a higher usage of dual antiplatelet therapy (DAPT) in that setting. I've heard some people postulate that some of that later MI benefit may in fact be some of those differences in therapy rather than the stent itself. It may be some additional benefit of having a P2Y12 inhibitor on board. Any thoughts on that?

Al-Lamee: We need to know more about that. It's possible that there is a definite contribution. It would make sense that the DAPT might make a contribution. Perhaps this is a dual effectsome of it from the revascularization, some of it the medications.

Tamis-Holland: I agree completely. This was not a trial on bleeding versus ischemic events in patients on DAPT. So that whole issue of bleeding events, which would be adjudicated in a trial that was looking specifically at that, is not. So you are getting, in a sense, the "DAPT trial" benefits of long-term DAPT without looking at the bleeding risk. We know from the CAPRIE trial that a single antiplatelet with a P2Y12 inhibitor is superior to aspirin alone in the vascular disease patients. One would think that it's a similar kind of situation.

O'Donoghue: It will be interesting to see whether this is something we should be considering for our patients with stable coronary disease who are being medically managed without a stent. Should we be thinking about a P2Y12 inhibitor for those patients? Obviously, it has been a little harder to demonstrate net clinical benefit in the past. Nonetheless, thinking about how best to optimize medical therapies is most important.

Al-Lamee: That is a trial we need.

Tamis-Holland: I was just going to say that. I was thinking we need to plan a trial.

O'Donoghue: That is the perfect place to wrap up. We'll start working on our trial designs. Thank you both for joining me today to discuss this very exciting topic.

Tamis-Holland: Thank you for having me.

Al-Lamee: Thank you.

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