Official’s tweet causes flap in linking crime, genetics – The Philadelphia Tribune

A high ranking employee for the Pennsylvania Department of Corrections went viral on social media Thursday after he posted a tweet suggesting "there is a genetic component to crime."

Bret Bucklen, the director for the DOC's Office of Research and Statistics, was engaged on May 1 in a political debate on Twitter that appears to have been based on the new Republican health care bill.

"There are those who are unfortunate. There are many more who made bad choices," Bucklen said. "Why can't liberals come to terms with that."

The debate took a turn, though, when Bucklen suggested crime was genetic.

One Twitter user responded, writing that "this could go toward a racist fallacy really quick and I hope it doesnt." To which Bucklen replied, "You doubt that there is a genetic component to crime?"

Race and crime have been scientifically linked with racists promoting the idea that Blacks and other ethnic minorities are genetically disposed to criminality, are less intelligent and lack work ethic to justify white superiority.

The ideas also go along with eugenics, a strain of thought from the early 20th century and adopted by the Nazi regime of Adolf Hltler that believed controlled breeding could improve the human race.

In recent years though, linking criminality and genetics has become more acceptable in science and a New York Times article from 2011 about it said researchers estimate about 100 studies showed a link between genes and crime.

But with nearly 2,000 retweets by Thursday afternoon, including one from new era civil rights activist Deray McKesson, Bucklen's comments were looked at through a racial lens by many social media users.

Secretary of Corrections John Wetzel noted the limits of social media in an email that was sent through a spokesperson to The Tribune.

"Complex subjects rarely are adequately defined in 140 characters," Wetzel said. "Department of Corrections employees have the right to freedom of expression on their personal social media accounts on their own time.

"With that being said, we recognize the sensitivity to a subject like this given the historic connotation of race in criminal justice policy," he added. "I have spoken to Dr. Bucklen, our Director of Planning, Research and Statistics, and that was not the intent of his remark and he should have used better judgment in his word choice and lack of context for his comments.

"That said," Wetzel said, "Dr. Bucklen has been a leader on my team in reducing biased and unjust policies in Pennsylvanias criminal justice system, including criminal justice reforms through the Justice Reinvestment Initiative and leading the fight against new mandatory minimums."

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Official's tweet causes flap in linking crime, genetics - The Philadelphia Tribune

Scientists find new genetic locations for type 2 diabetes – Medical … – Medical News Today

Scientists from University College London and Imperial College London in the United Kingdom have identified new genetic locations that might make some people more prone to developing type 2 diabetes.

Type 2 diabetes affects hundreds of millions of people worldwide, and the numbers have skyrocketed in recent years. According to the World Health Organization (WHO), the number of people with diabetes has almost quadrupled in the past few decades, from 108 million in 1980 to 422 million in 2014.

In the United States, 29 million people currently have diabetes, and 86 million are thought to have prediabetes.

Until now, researchers were aware of 76 chromosomal locations, or "loci," that underlie this metabolic disease. However, new research analyzed the human genome further and found an additional 111.

The new study - published in the American Journal of Human Genetics - was co-led by Dr. Nikolas Maniatis of University College London's (UCL) Genetics, Evolution, and Environment department, together with Dr. Toby Andrew of Imperial College London's Department of Genomics of Common Disease.

Using a UCL-developed method of genetic mapping, Maniatis and team examined large samples of European and African American people, summarizing 5,800 cases of type 2 diabetes and almost 9,700 healthy controls.

They found that the new loci - together with the ones previously identified - control the expression of more than 266 genes surrounding the genetic location of the disease.

Most of the newly discovered loci were found outside of the coding regions of these genes, but within so-called hotspots that change the expression of these genes in body fat.

Of the newly identified 111 loci, 93 (or 84 percent) were found in both European and African American population samples.

After identifying genetic loci, the next step was to use deep sequence analysis to try to determine the genetic mutations responsible for the disease.

Maniatis and colleagues used deep sequencing to further examine three of the cross-population loci with the aim of identifying the genetic mutations. They then investigated a different sample of 94 Europeans with type 2 diabetes, as well as 94 healthy controls.

The researches found that the three loci coincided with chromosomal regions that regulate gene expression, contain epigenetic markers, and present genetic mutations that have been suggested to cause type 2 diabetes.

Dr. Winston Lau, of UCL's Genetics, Evolution, and Environment department, explains the significance of these findings:

"Our results mean that we can now target the remaining loci on the genetic maps with deep sequencing to try and find the causal mutations within them. We are also very excited that most of the identified disease loci appear to confer risk of disease in diverse populations such as African Americans, implying our findings are likely to be universally applicable and not just confined to Europeans."

Dr. Maniatis also highlights the contribution their study brings to the research community:

"No disease with a genetic predisposition has been more intensely investigated than type 2 diabetes. We have proven the benefits of gene mapping to identify hundreds of locations where causal mutations might be across many populations, including African Americans. This provides a larger number of characterized loci for scientists to study and will allow us to build a more detailed picture of the genetic architecture of type 2 diabetes," says the lead author.

Dr. Andrew also adds, "Before we can conduct the functional studies required in order to better understand the molecular basis of this disease, we first need to identify as many plausible candidate loci as possible. Genetic maps are key to this task, by integrating the cross-platform genomic data in a biologically meaningful way."

Learn how gene discovery could yield new treatments for type 2 diabetes.

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Scientists find new genetic locations for type 2 diabetes - Medical ... - Medical News Today

Genetics May Underlie Impaired Skilled Movements – ReliaWire

The lost function of two genes prevents infant laboratory mice from developing motor skills as they mature into adults, a new study from Cincinnati Childrens Hospital Medical Center and the City University of New York School of Medicine reports. Researchers also suggest in the study that people with certain motor development disabilities be tested to see if they have altered forms of the same genes.

The study demonstrates that neural circuits between the brains motor cortex region and the spinal cord did not properly reorganize in maturing mice. The circuits are part of the cortical spinal network, which coordinates the activation of muscles in limbs.

Researchers bred the mice to lack molecular signaling from the Bax/Bak genetic pathway. Investigators demonstrated in a variety of experiments how Bax/Baks downstream molecular targets are vital to developing appropriately sophisticated connections between the motor cortex, spinal circuits and opposing extensor/flexor muscle groups in the animals.

Lead author Yutaka Yoshida, PhD, of the Division of Developmental Biology at Cincinnati Childrens, said:

If mutations in the Bax/Bak pathway are found in human patients with developmental motor disabilities, these findings could be very translational to possible medical application. Our goal is for future studies to determine whether disruptions in Bax/Bak pathway are implicated in some people with skilled motor disabilities and whether it also regulates reorganization of other circuits in the mammalian central nervous system.

The researchers stress that because the study was conducted with mice, additional research is required before it can be confirmed whether the data apply directly to human health.

Young postnatal mammals, including human babies, can perform only basic unskilled motor tasks. Citing a number of previous studies on this point, the authors of the paper write one reason for this is that infantile neural circuitry is wired to activate antagonistic (or opposing) muscles at the same time.

As humans and mammals age beyond infancy, and try repeatedly to perform skilled movements, neural circuit connections between the motor cortex of the brain and spinal cord reorganize. Connections to the spine and to opposing muscle groups become more sophisticated.

This enables antagonistic muscle pairs to be activated reciprocally when certain tasks call for it.

An estimated six percent of children worldwide suffer from developmental motor disabilities that affect skilled motor control, according to Yoshida. A significant number of these individuals maintain an immature pattern of co-activating opposite muscle pairs into adulthood, which impedes skilled movements and manual dexterity.

One lifelong disorder is dyspraxia, also called developmental coordination disorder (DCD). According to the National Institute of Neurological Disorders and Stroke, developmental dyspraxia is characterized by an impaired ability to plan and carry out sensory and motor tasks.

People with the disorder may appear out of sync with their environment and symptoms can vary, including: poor balance and coordination, clumsiness, vision problems, perception difficulties, emotional and behavioral problems, difficulty with reading, writing, and speaking, poor social skills, poor posture, and poor short-term memory.

Although people with the disorder can be of average or above average intelligence, they may move their limbs immaturely.

To explore connections between corticospinal neurons in the mouse brains motor cortex and muscles and to identify genetic pathways involved in their development scientists in the study used trans-synaptic viral and electrophysiological assays. This allowed them to observe and trace how these connections develop in maturing mice.

Yoshida and colleagues point to earlier studies showing that the initial formation of prenatal motor circuits are determined genetically by the effects of transcription factors (which turn genes on and off in a cells control center, the nucleus). This control in turn triggers molecular processes that influence the development of never fibers, which transmit impulses.

Knowledge is limited about how initial motor circuits are reorganized after birth to become more sophisticated in adulthood. Even less is known about why this organization fails to occur as mammals mature, according to the researchers.

But trans-synaptic tracing in the current study highlighted how the presence of Bax/Bak signaling resulted in sophisticated circuity as mice matured. It also triggered the development of circuits that allowed opposing muscle groups to activate reciprocally.

The absence of Bax/Bak signaling resulted in continued formation of inappropriate circuitry that did not allow reciprocal activation of these muscles.

In skilled motor tests involving adult Bax/Bak mutant mice, the animals exhibited abnormal co-activation of opposing extensor and flexor muscle pairs. Although they demonstrated normal reaching and retrieval behaviors when given mouse chow, the mice had deficits in skilled grasping.

Mice lacking the Bax/Bak pathway signaling also had difficulty with walking tests on a balance bar and metal grid as measured by the number of foot slips.

Image: Cincinnati Childrens

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How Do the Genetics of the Force Work in Star Wars? – Fandom (blog)

Its Star Wars Day, and thats got everyone celebrating the awesome lore and amazing detail of the Star Wars universe. So, lets talk about one question thats never really been explained: How exactly does the ability to use the Force get passed on in the Star Wars universe?

Helix, a personal genomics company, hastaken a closer look at that question. And theyve used science to come up with some possibleanswers

We have theorized that based on the lineage of the Skywalker-Solo clan, theres abundant evidence that Force-sensitivity is genetic. This is due to the similarity in traits between Skywalker family members raised in isolation from one another, and in totally separate environments (with the exception of Ben Solo who was raised with his mother and trained by his uncle). Luke and Leia grew up on entirely different planets. Neither knew their father (until later in life), and Leia was raised as galactic rebel royalty, whereas Luke was a simple moisture farmer bullseyeing womp rats in his T-16.

The experts at Helix have come up with a number of other fun science-y theories about how the Force is inherited in the Star Wars universe:

Its okay if you dont understand the genetics terminology. What this actually means is that the Force is a trait which parents pass on to their kids who pass them onto their kids. You see the trait in every single generation, just like the Skywalkerfamily.

Now, without getting too technical, this is a special type of genetic mutation which can have repeating effects. In some cases, repeat mutations can increase with each generation, and when the number of repeats exceeds a certain number, resulting traits can appear. So, for example, Shmi Skywalker may have had a repeat number just below the threshold, but it expanded in Anakin to the point where it appeared as if he had suddenly inherited the Force.

Of course, Star Wars is a fantasy and science doesnt necessarily apply, especially to things as mystical as the Force. But its fun to think about.

Want to know more?Read the full story on Helix.

Would you like to be part of the Fandom team? Join our Fan Contributor Program and share your voice on Fandom.com!

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Here’s Why Myriad Genetics Rose as Much as 16% This Morning – Madison.com

What happened

Shares of genetic-testing pioneer Myriad Genetics (NASDAQ: MYGN) received a much-needed boost today, rising as much as 16%, after the company announced fiscal third-quarter 2017 financial results. The stock has witnessed a 42% decline in the last year, although it is now up roughly 28% year to date, as investors see signs of life for the company's most important revenue machine and are holding out hope for a pipeline of promising growth products.

The strong performance in the most recent quarter prompted management to raise its full-year fiscal 2017 financial guidance for revenue and narrow the range for earnings per share. As of 12:45 p.m. EDT, the stock had settled to a 15.5% gain.

Image source: Getty Images.

There were reasons for optimism and pessimism in the financial update. Consider how the most important products fared compared to last year's fiscal third quarter:

Metric

Fiscal Q3 2017

Fiscal Q3 2016

% Change

Hereditary-diagnostic-testing revenue

$140.8 million

$156.3 million

(10%)

GeneSight testing revenue

$23.9 million

N/A

N/A

Vectra DA testing revenue

$11.2 million

$12.3 million

(9%)

Prolaris testing revenue

$3.4 million

$5.2 million

(35%)

EndoPredict testing revenue

$2.3 million

$1.1 million

109%

Other revenue

$3.6 million

$2.5 million

44%

Data source: Myriad Genetics.

A 10% year-over-year drop in revenue from hereditary diagnostic testing may not seem like much reason to celebrate, but it marks the second consecutive sequential gain for Myriad Genetics after many quarters of decline. It's a silver lining investors aren't willing to overlook.

Of course, the array of promising growth products is turning in more mixed results. Products excluding GeneSight combined for a year-over-year drop in revenue of $1.7 million. In fact, if not for GeneSight, Myriad Genetics' total revenue would have declined. It's a major reason for the updated revenue guidance -- and investors should be happy to have GeneSight growing into a significant contributor to the overall business and performing well against offerings from competitors.

Metric

Fiscal Q3 2017

Fiscal Q3 2016

% Change

Total revenue

$196.9 million

$190.5 million

3%

Operating expenses

$139.7 million

$107.7 million

30%

Net income

$4.2 million

$34.5 million

(88%)

Data source: Myriad Genetics.

Efforts to rapidly scale new products and services have resulted in a large increase in operating expenses in recent quarters, eating away at net income. Last quarter was no different, but the increase in operating expenses is a necessary evil for investors looking for the company to turn the page long-term.

The company now expects full-year fiscal 2017 revenue to fall between $763 million and $765 million, compared to $754 million in fiscal 2016. Meanwhile, diluted earnings per share are expected to fall between $0.23 and $0.25, compared to $1.71 in fiscal 2016.

Investors are aware that Myriad Genetics is a company in transition, turning away from proprietary testing products (driven by price) and toward cheaper, larger-scale, and more flexible services such as GeneSight (driven by volume) that are in high demand from patients and clinicians. Viewed through that lens, there were no major surprises in the most recent quarter. The company continues to work toward its long-term goals.

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Chick embryology at AMS – Blair Enterprise Publishing

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Hatching eggs is a highlight of elementary school – BlueRidgeNow.com

By Denise Sherrill, Henderson County 4-H

What is your favorite memory from elementary school? Was it playing on the playground, a favorite teacher, or a best friend?

Henderson County 4-H has provided eggs, supplies for hatching them and teacher training for schools for over 20 years, and teachers tell us that participating in 4-H Embryology is a highlight for many elementary school students.

Fifty-eight classes, mostly second grade, are participating in 4-H Embryology this spring, along with all of the students at Dana Elementary. The N.C. Essential Standards for Science require second grades to learn about life cycles.

4-H volunteers first hatch eggs at home, helping them to become incubation "experts." These volunteers then deliver eggs to the schools. On delivery day, they check each classroom to ensure the incubator is located in a good spot, has water in the bottom, and the temperature is 100 degrees.

They explain to the students that the incubator is the closest thing we have to a mother hen. It provides protection, warmth and humidity. Protection and warmth are obvious, but humidity is a surprise for most of us. The mother hen provides moisture by plucking out some of her feathers, and pressing her skin against the eggs. The volunteers also answer students' questions. The 4-H agent also visits each classroom to help ensure a successful hatch.

Learning life skills is a focus of 4-H. Teachers tell us that the main skill learned by participants in 4-H Embryology is responsibility. Students also develop an interest in wildlife and caring for wildlife, and an improvement in their basic knowledge of science.Teachers also report that the embryology project helps their students aspire to a career in science or a related field.

One teacher wrote, "Students took responsibility for the record-keeping, egg turning and mentored first-graders by teaching them about the embryonic development. This gave them great life experience and great material for writing, which is the heart of comprehension!"

Teachers incorporate math, vocabulary, journaling and many different concepts into the embryology unit. This year Candi Mains and Zach Knox, teachers from Dana Elementary, created a fun song about oviparous animals.

A private donor helped to fund 4-H Embryology the past few years. Grant funds will be sought for new equipment for future years. Donors will be needed for ongoing supplies. Volunteers would be welcome to help with any part of this program: equipment repairs, delivering eggs to schools, preparing equipment for teachers, and sorting and storing equipment as it is returned.

Henderson County 4-H uses bobwhite quail eggs for 4-H Embryology. A dad of several 4-H alumni raises and releases the quail into the wild.

4-H Award

Deborah Clark, agricultural engineering teacher and 4-H club leader at Dana Elementary, received the NC 4-H Volunteer Leaders Association School Enrichment Award in March.

Clark enthusiastically works to develop skills in leadership, citizenship and responsibility in her students and 4-H club members. She involves all 480-plus students at her school in gardening and learning about nature each week. She implements 4-H Embryology and nutrition programs, and assists other teachers with these programs.

Deborah Clark inspires her students, and everyone who knows her, to do their best in all aspects of life.

4-H Mini-Gardening Contest

For all Henderson County youth, ages 9-18, as of Jan. 1: Each participant plants and cares for a 10-foot-by-12-foot vegetable garden and maintains a garden journal. Training, seeds and tomato plants are provided. Extension Master Gardeners visit each garden twice during the summer. Space is limited, so register soon.

4-H Sewing Classes

Registration for 4-H sewing classes is now open to anyone ages 10-18. Classes will be on Friday afternoons, beginning monthly from June 9 to Nov. 17. and each class will run for four weeks. Choose either 1-3 p.m. or 3:30-5:30 p.m. Beginners are welcome. Sewing machines, patterns and basic sewing kits are provided, along with adult helpers. The fee is $25. Sewing volunteers are always needed.

4-H Paper Clover Days at Tractor Supply, now through May 7

Support your local 4-H program by purchasing paper clovers at Tractor Supply.

Denise Sherrill is the 4-H agent for Henderson County. 4-H is the Youth Development Program of NC Cooperative Extension, which is a division of the College of Agriculture and Life Sciences at NCSU. Visit henderson.ces.ncsu.edu/4-H, call 828-697-4891 or email Denise_Sherrill@ncsu.edu to learn more about 4-H clubs, activities or endowments. Donors are always needed to help provide scholarships for 4-H camp and other activities. Donations may be sent to: Henderson County 4-H, 100 Jackson Park Road, Hendersonville, NC 28792.

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TMP to add FFA chapter this fall – hays Post

By CRISTINA JANNEY Hays Post

Thomas More Prep-Marian will be the first private school in the state to have an FFA chapter beginning this fall.

FFA, formerly Future Farmers of America, focuses on agriculture education.

Jay Harris was brought to TMP this school year to teach agriculture classes. Those classes included introduction to agriculture for junior high students and introduction to animal and crop production for high school students.

Mid-level courses will be offered next year.

The junior high classes are geared to where food comes from. A lot of students in this generation think that food comes from a grocery store, Harris said.

The students level of experience with agriculture have been mixed. Some students have grown up on farms, some students have grandparents or relatives who have farms, and some students have little experience with agriculture.

The majority of the students have a least one parent that do something that has to do with agriculture, and the students didnt realize it, he said. They work at HaysMed. Who are a number of their clients? Farmers. They work at Carrico Implement or they work at one of the coops. There are a lot of ag-related careers and jobs in this area.

Harris and Principal Chad Meitner said agriculture is so prevalent in this area of the state, most careers are affected by agriculture.

If you are a lawyer, Meitner said. you are probably going to have clients who are farmers.

Harris said the formation of the chapter was student driven with a couple of dozen students expressing serious interest.

Jacob Schmeidler, sophomore, was one of those students.

Schmeidlers father raises cattle and row crops in the Hays area. Jacob has been involved in 4-H throughout his childhood, including public speaking and livestock judging.

He has considered a career in large-animal veterinary, but is now leaning toward cattle embryology and breeding.

In the ag classes this year, I have learned so much, he said, and it taps into the field that I want to go into.

The networking opportunities that FFA will provide also will be valuable, Schmeidler said, adding he hopes the program will help him find a good college where he can pursue his career aspirations.

This summer students will attend the state FFA conference. The students will be charged with writing a constitution for the chapter.

FFA supports three arms of academic study. Those include classroom instruction, labs and supervised agriculural experiences or SAEs.

The SAEs have the students working on practical ag projects, such as raising livestock or having an experience in ag journalism.

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TMP to add FFA chapter this fall - hays Post

Cash for babies? Not quite, but egg donors deserve protection – The Guardian

Two fifths of eggs in British clinics are from sharing schemes swapping free treatment for genetic material. Photograph: Chris Knapton/Alamy

I t isnt a baby, of course: just a tiny clump of cells invisible to the naked eye, a dot of potential life that may yet come to nothing. So some will be bemused by this weeks fuss over the practice of women donating human eggs to fertility clinics for other womens use in return for getting their own IVF treatment free. Unless you have religious objections, whats wrong with a deal that may represent poorercouples only chances of starting a family?

So-called egg-sharing schemes have been around for 20 years and are quite legal, so long as nobody is paid outright for donating. But the results of a newspapers undercover investigation into fertility clinics make uncomfortable reading nonetheless.

Journalists posing as would-be parents too broke to afford IVF were reportedly handed leaflets in some clinics promoting loans to cover the fees at up to four times bank rates. In others, egg donation seems to have been heavily pushed. One nurse allegedly suggested the couple think of it as like donating blood, even though its a hospital procedure performed under anaesthetic after weeks of taking ovary-stimulating drugs that carry a small risk of serious side-effects, and the process carries potentially serious emotional implications. What if you fail to get pregnant, only for the egg you gave away to grow up into someone elses child with a legal right to trace their biological mother when they reach 18?

So the Human Fertility and Embryology Authority is right to promise an investigation, and should follow the trail all the way to its logical conclusion. The fertility industry isnt some benign, kindly stork, but a multimillion-pound business rife with potential conflicts between profit and patient welfare that are overdue some scrutiny. The bigger question is how far responsibility for anything that may have gone wrong should be shared by successive governments, whose failure to fund free IVF treatment on the NHS has driven poorer patients into potentially vulnerable situations.

An estimated 40% of eggs in British clinics now come from sharing schemes swapping free treatment for genetic material. Its arguably prettier than alternatives seeking treatment overseas in countries with more lax regimes, or the seedy trade in women illegally offering eggs for sale over the internet and has led to an estimated 2,000 births.

Yet sharing remains a moral grey area. Its not quite cash for babies, but its not a million miles away either. And with payment, even in kind, comes the risk of exploitation. Is a woman who effectively has no choice but to donate eggs if she wants children of her own really giving them freely, as the law demands? For, inevitably, its poorer women who will be disproportionately attracted to donating, and richer women those who can afford treatment outright who benefit. Fertility specialists insist many women undergoing IVF would be happy to donate spares for nothing. One Belgian study found a 70% drop in donation after the Belgian government promised free IVF, suggesting many donors were motivated by financial considerations. (Ironically, if the Department of Health had actually funded the three free cycles of IVF that the health watchdog NICE recommended 13 years ago, waiting lists for donor eggs might well be longer now.)

There is a web of conflicting interests to unpick here, and an obvious tension between the HFEAs guidelines which state that a donation must be altruistic and in the spirit of contributing to a wider social good to comply with British law and the reality that sharing is clearly sometimes a euphemism for something darker.

Ive spent just enough time in fertility clinics long story, but while getting pregnant naturally was easy the first time, the second time never happened to know theyre places of vulnerability. Grief, desperation and hormones cloud everyones judgment until nothing seems to matter but the baby you dont have. When I told my NHS consultant I was in two minds about IVF, given that I was lucky enough to have one child already, he blurted out, so it doesnt actually matter that much.

At the time, it felt brutally insensitive given many women find secondary infertility (failing to get pregnant when youve done it before) as distressing as childlessness. But with hindsight Im grateful not to have been pushed into endless rounds of treatment that were statistically unlikely to work. I wonder if a less scrupulous private consultant might just have banked the cheque.

There are many private clinics providing outstandingly ethical service, of course. But the lesson of too many scandals involving womens health including the disturbing case of Ian Paterson, the breast cancer surgeon convicted last week of repeatedly performing mastectomies on private patients who didnt need them is that its naive to assume there will never be rogues. Kneejerk judgments aroused by any mention of female fertility have in the past perhaps tended to shield this industry from scrutiny. Public sympathy is with the doctors, those twinkly-eyed miracle babymakers, while their customers are caricatured as silly women paying the price for leaving it too late even though women young enough to make good egg donors have, by definition, not left it too late. If they had, their eggs would be useless.

But lets be honest. Its not just patients who benefit from stretching the age or income limits for IVF treatment, as egg donation does. Almost every breakthrough expands the potential pool of paying customers. Its not enough to grunt caveat emptor when taxpayers and politicians alike have saved a fortune by tacitly shunting emotionally vulnerable people off the NHSs books and into private sector hands. Doctors are not the only ones who owe these patients a duty of care.

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Cash for babies? Not quite, but egg donors deserve protection - The Guardian

Advanced prostate cancer treatment failure due to cell reprogramming – Medical Xpress

May 4, 2017 Micrograph showing prostatic acinar adenocarcinoma (the most common form of prostate cancer) Credit: Wikipedia

Columbia University Medical Center (CUMC) researchers have discovered a molecular mechanism that reprograms tumor cells in patients with advanced prostate cancer, reducing their response to anti-androgen therapy. The findings, based on a study in mice, could help to determine which patients should avoid anti-androgen therapy and identify new treatments for people with advanced prostate cancer.

The study was published online April14th in the journal Cancer Discovery.

Since androgens (male hormones) are known to drive prostate cancer, patients with recurrent or advanced disease are typically treated with anti-androgen medications. However, most patients fail treatment and develop an aggressive form of prostate cancer known as castration-resistant prostate cancer, or CRPC.

"It's been a mystery why some patients do not respond to anti-androgens, and why a subset of these patients actually get worse after treatment," said study co-leader Cory Abate-Shen, PhD, the Michael and Stella Chernow Professor of Urological Oncology and professor of urology, medicine, systems biology, and pathology and cell biology at CUMC. "Our findings show that in many of these patients, the tumor cells are reprogrammed so that they are no longer dependent on androgens."

To learn about the molecular mechanisms that drive resistance to anti-androgens, Drs. Abate-Shen and Michael Shen co-led a team to develop a strain of mice that lack two tumor-suppressor genes, Trp53 and Pten. These genes are both mutated in about 25 percent of patients with advanced prostate cancer. Mice that were treated with the anti-androgen drug abiraterone failed to respond and had accelerated tumor growthsimilar to some humans with advanced prostate cancer who do not respond to anti-androgen therapy.

"We found a number of genes that were overexpressed in mice with CRPC and also conserved in patients with the disease. Among the most interesting of these was SOX11, which regulates the development of the nervous system," said study co-leader Michael M. Shen, PhD, professor of medical sciences at CUMC.

Most localized, slow-growing prostate cancers are largely composed of epithelial cells, which are rich in androgen receptors that increase their susceptibility to anti-androgen therapy. In contrast, aggressive prostate cancers, particularly those that fail treatment, often contain many neuroendocrine-like cells, which lack androgen receptors and are therefore less responsive to anti-androgen therapy.

"This raised the question, where are the neuroendocrine-like cells in prostate tumors coming from?" said Dr. Abate-Shen. "While previous research hinted that epithelial tumor cells may be reprogrammed to become neuroendocrine-like cells, our study provides the first direct evidence that this reprogramming is actually occurring and that it is mediated, at least in part, by SOX11."

The researchers also demonstrated that SOX11 acts in a similar fashion in human prostate cancer cells.

"By giving anti-androgens to patients with CRPC, we are eliminating the cancer cells that need androgen to survive and enriching the tumor with the remaining neuroendocrine-like cells. The net effect is to create an even more aggressive tumor," said Dr. Shen.

The researchers also identified several "master regulators"genes that control SOX11 and other genes involved in prostate cancer reprogrammingthat might be targeted for new prostate cancer treatments.

"Based on our findings, genetic testing to identify SOX11 and the master regulators may be considered before embarking on anti-androgen therapy for patients with advanced prostate cancer," said Dr. Shen.

Explore further: Study uncovers an additional strategy for targeting treatment-resistant prostate cancer

More information: Min Zou et al, Transdifferentiation as a Mechanism of Treatment Resistance in a Mouse Model of Castration-resistant Prostate Cancer, Cancer Discovery (2017). DOI: 10.1158/2159-8290.CD-16-1174

Prostate cancer cells depend on signaling through the androgen receptor (AR) to grow and survive. Many anti-cancer therapies that target ARs are initially successful in patients, including a class of drugs known as CYP17A1 ...

Advanced prostate cancer resistant to castration therapy appears to respond well to a combination of immune checkpoint blockades and treatments that target certain immune-busting cells commonly associated with poor patient ...

Prostate cancer is one of the most common cancers in men. Tumor growth is critically regulated by the androgen receptor, and treatment strategies to lower androgens, such as testosterone, are a mainstay of clinical treatment. ...

An orally bioavailable androgen receptor PROTAC, developed using a protein degradation technology, was effective in lowering tumor burden in mice bearing human castration-resistant prostate cancer, according to data presented ...

Metastatic prostate cancer, or prostate cancer that has spread to other organs, is incurable. In new research published in the journal Science, Roswell Park Cancer Institute scientists have identified two gatekeeper genes ...

Advanced prostate cancer is usually treated by removing androgen, the male hormone that helps it grow. Although initially effective, this treatment often leads to the tumor becoming castration resistant- a lethal condition. ...

The fight against skin cancer just got a new weapon. For years, melanoma researchers have studied samples that were considered uniform in size and color, making them easier to examine by more conventional means. But melanomas ...

Two independent studies have begun mapping the connections between and identities of the thousands of immune cells surrounding human tumors. One research group, looking at kidney cancer, found that tumors with different clinical ...

Columbia University Medical Center (CUMC) researchers have discovered a molecular mechanism that reprograms tumor cells in patients with advanced prostate cancer, reducing their response to anti-androgen therapy. The findings, ...

Despite intense research, there's been much confusion regarding the exact role of a protein in a critical cancer-linked pathway. On one hand, the protein is described as a cell proliferation inhibitor, on the other, a cell ...

Immunotherapy, which has achieved remarkable results in late-stage lung cancer patients, can also hold great hope for newly diagnosed patients, cutting the deadly disease off before it has the chance to take hold and offering ...

New research from Sanford Burnham Prebys Medical Discovery Institute (SBP) at Lake Nona uncovers the modus operandi of a mysterious molecule called SPRIGHTLY that has been previously implicated in colorectal cancer, breast ...

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Advanced prostate cancer treatment failure due to cell reprogramming - Medical Xpress