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Category Archives: Stem Cell Therapy
Bone gives ‘some’ heart healing
Posted: February 15, 2012 at 1:17 am
14 February 2012 Last updated at 19:10 ET By James Gallagher Health and science reporter, BBC News
Bone marrow stem cell therapy offers "moderate improvement" to heart attack patients, according to a large UK review of clinical trials.
The analysis by the Cochrane Collaboration looked at 33 trials involving more than 1,700 patients.
It said longer-term studies were needed to see if the experimental therapy affected life expectancy.
The review comes a day after doctors reported the first case of using heart cells to heal heart attack damage.
If a patient survives a heart attack, dead heart muscle is replaced with scar tissue - leaving the patient weaker and possibly on a lifetime of medicine.
Researchers are beginning to show that taking cells from a heart, growing millions of new heart cells in the laboratory and pumping those back into the heart may reduce scar tissue and lead to new heart muscle.
Continue reading the main story “Start Quote
Stem cell therapy may also reduce the number of patients who later die or suffer from heart failure, but currently there is a lack of statistically significant evidence based on the small number of patients treated so far”
End Quote Dr Enca Martin-Rendon Lead researcher
However, the trials are at a very early stage and in only a handful of patients. Using a similar technique with cells taken from the bone marrow, which is a prime source of stem cells, has a much longer pedigree.
The report by Cochrane pooled the data from all 33 bone marrow trials which had taken place up to 2011.
It concluded that bone marrow therapy "may lead to a moderate long-term improvement" in heart function which "might be clinically very important".
Longer life uncertain
It said there was still no evidence of "any significant effect on mortality" in comparison with standard treatment. However, this may be due to the size of the studies and that patients were followed for a short period of time.
Lead author Dr Enca Martin-Rendon, from NHS Blood and Transplant at the John Radcliffe Hospital in Oxford, said: "This new treatment may lead to moderate improvement in heart function over standard treatments.
"Stem cell therapy may also reduce the number of patients who later die or suffer from heart failure, but currently there is a lack of statistically significant evidence based on the small number of patients treated so far."
Prof Anthony Mathur, from Barts and the London School of Medicine and Dentistry, is leading the largest ever trial of stem cells in heart attack patients.
It starts this year, however, he told the BBC that the results could come quite quickly. Three thousand patients across Europe will take part. They will be injected with stem cells five days after a heart attack and then followed for two years to see if the therapy affects life expectancy.
Prof Peter Weissberg, medical director at the British Heart Foundation, said: "This review reflects the consensus of opinion about these trials - cell therapy has a modestly beneficial effect.
"Despite that, no-one knows why, or even if, cell therapies will translate into better survival or sustained improvement in damaged hearts. It's much too early to judge the likely long-term benefits."
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Bone gives 'some' heart healing
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Stem Cells May Help Regenerate Heart Muscle
Posted: February 15, 2012 at 1:17 am
A promising stem cell therapy approach could soon provide a way to regenerate heart muscle damaged by heart attacks.
Researchers at Cedars-Sinai Heart Institute and The Johns Hopkins University harvested stem cells from the hearts of 17 heart attack patients and after prepping the cells, infused them back into the patients' hearts. Their study is published in the current issue of The Lancet.
The patients received the stem cell infusions about three months after their heart attacks.
Researchers found that six months after treatment, patients had significantly less scarring of the heart muscle and also showed a considerable increase the amount of healthy heart muscle, compared to eight post-heart attack patients studied who did not receive the stem cell infusions. One year after, scar size was reduced by about 50 percent.
"The damaged tissue of the heart was replaced by what looks like healthy myocardium," said Dr. Peter Johnston, a study co-author and an assistant professor of medicine at The Johns Hopkins University School of Medicine. "It's functioning better than the damaged myocardium in the control subjects, and there's evidence it's starting to contract and generate electrical signals the way healthy heart tissue does."
While this research is an early study designed to demonstrate that this stem cell therapy is safe, cardiologists say it's an approach that could potentially benefit millions of people who have suffered heart attacks. Damage to the heart muscle is permanent and irreparable, and little can be done to compensate for loss of heart function.
"In the U.S., six million patients have heart failure, and the vast majority have it because of a prior heart attack," said Johnston.
The damaged scar tissue that results from a heart attack diminishes heart function, which can ultimately lead to enlargement of the heart.
At best, Johnston said, there are measures doctors can try to reduce or compensate for the damage, but in many cases, heart failure ultimately sets in, often requiring mechanical support or a transplant.
"This type of therapy can save people's lives and reduce the chances of developing heart failure," he said.
Cardiac Regeneration A Promising Field
Other researchers have also had positive early results in experiments with stem cell therapy using different types of cells, including bone marrow cells and a combination of bone marrow and heart cells.
"It's exciting that studies using a number of different cell types are yielding similar results," said Dr. Joshua Hare, professor of cardiology and director of the University of Miami Interdisciplinary Stem Cell Institute.
The next steps, he said, include determining what the optimal cell types are and how much of the cells are needed to regenerate damaged tissue.
"We also need to move to larger clinical trials and measure whether patients are improving clinically and exhibiting a better quality of life after the therapy."
In an accompanying comment, Drs. Chung-Wah Siu amd Hung-Fat Tse of the University of Hong Kong wrote that given the promising results of these studies, health care providers will hopefully recognize the benefits that cardiac regeneration can offer.
And Hare added that someday, this type of regeneration can possibly offer hope to others who suffered other types of organ damage.
"This stategy might work in other organs," he said. "Maybe this can work in the brain, perhaps for people who had strokes."
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Stem Cells May Help Regenerate Heart Muscle
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Stem Cells May Help Regenerate Heart Muscle
Posted: February 14, 2012 at 6:34 pm
A promising stem cell therapy approach could soon provide a way to regenerate heart muscle damaged by heart attacks.
Researchers at Cedars-Sinai Heart Institute and The Johns Hopkins University harvested stem cells from the hearts of 17 heart attack patients and after prepping the cells, infused them back into the patients' hearts. Their study is published in the current issue of The Lancet.
The patients received the stem cell infusions about three months after their heart attacks.
Researchers found that six months after treatment, patients had significantly less scarring of the heart muscle and also showed a considerable increase the amount of healthy heart muscle, compared to eight post-heart attack patients studied who did not receive the stem cell infusions. One year after, scar size was reduced by about 50 percent.
"The damaged tissue of the heart was replaced by what looks like healthy myocardium," said Dr. Peter Johnston, a study co-author and an assistant professor of medicine at The Johns Hopkins University School of Medicine. "It's functioning better than the damaged myocardium in the control subjects, and there's evidence it's starting to contract and generate electrical signals the way healthy heart tissue does."
While this research is an early study designed to demonstrate that this stem cell therapy is safe, cardiologists say it's an approach that could potentially benefit millions of people who have suffered heart attacks. Damage to the heart muscle is permanent and irreparable, and little can be done to compensate for loss of heart function.
"In the U.S., six million patients have heart failure, and the vast majority have it because of a prior heart attack," said Johnston.
The damaged scar tissue that results from a heart attack diminishes heart function, which can ultimately lead to enlargement of the heart.
At best, Johnston said, there are measures doctors can try to reduce or compensate for the damage, but in many cases, heart failure ultimately sets in, often requiring mechanical support or a transplant.
"This type of therapy can save people's lives and reduce the chances of developing heart failure," he said.
Cardiac Regeneration A Promising Field
Other researchers have also had positive early results in experiments with stem cell therapy using different types of cells, including bone marrow cells and a combination of bone marrow and heart cells.
"It's exciting that studies using a number of different cell types are yielding similar results," said Dr. Joshua Hare, professor of cardiology and director of the University of Miami Interdisciplinary Stem Cell Institute.
The next steps, he said, include determining what the optimal cell types are and how much of the cells are needed to regenerate damaged tissue.
"We also need to move to larger clinical trials and measure whether patients are improving clinically and exhibiting a better quality of life after the therapy."
In an accompanying comment, Drs. Chung-Wah Siu amd Hung-Fat Tse of the University of Hong Kong wrote that given the promising results of these studies, health care providers will hopefully recognize the benefits that cardiac regeneration can offer.
And Hare added that someday, this type of regeneration can possibly offer hope to others who suffered other types of organ damage.
"This stategy might work in other organs," he said. "Maybe this can work in the brain, perhaps for people who had strokes."
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Stem Cells May Help Regenerate Heart Muscle
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Therapy targets leukemia stem cells
Posted: February 13, 2012 at 11:07 pm
Chronic myelogenous leukemia (CML) is a cancer of the white blood cells for which tyrosine kinase inhibitors are currently the first line of therapy. These drugs prolong survival, but disease recurrence is often seen after drug treatment is stopped. "Tyrosine kinase inhibitors do not eliminate leukemia stem cells, which remain a potential source of cancer recurrence," explains senior coauthor Dr. Ravi Bhatia from the City of Hope National Medical Center in Duarte, California. "CML patients need to take tyrosine kinase inhibitor treatment indefinitely, which carries a significant risk of toxicity, lack of compliance, drug resistance, relapse, and associated expense."
Strategies targeting leukemia stem cells are necessary to achieve a cure. Previous work has implicated the enzyme sirtuin 1 (SIRT1) in protecting stem cells from stress and in playing a role in leukemia, as well as other types of cancer. In the current study, Dr. Bhatia, coauthor Dr. WenYong Chen, first author Ling Li, and their colleagues investigated whether SIRT1 was involved in the survival and growth of CML stem cells. The researchers discovered that SIRT1 was overexpressed in CML stem cells and that inhibition of SIRT1selectively reduced the survival and growth of CML stem cells. Importantly, SIRT1 inhibition was associated with activation of the p53 tumor suppressor.
Taken together, the results reveal a specific mechanism that supports the survival of leukemia stem cells. "Our findings are important because they show that SIRT1-mediated inactivation of p53 contributes to CML leukemia stem cell survival and resistance to treatment with tyrosine kinase inhibitors," concludes Dr. Chen. "We suggest that SIRT1 inhibition is an attractive approach to selectively target leukemia stem cells that resist elimination by current treatments."
Provided by Cell Press (news : web)
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Therapy targets leukemia stem cells
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Vet offers stem cell therapy for dogs
Posted: February 13, 2012 at 11:07 pm
COLUMBIA, SC (WIS) - Cutting-edge arthritis treatment for our four-legged family members is now available in Columbia.
Banks Animal Hospital is the first in the area to offer in-house Stem Cell therapy. It uses your pets own body to heal itself.
Take 13-year-old Maggie, for example. The energetic pup has a limp that usually keeps her from jumping or going up stairs.
"Today when everybody's out there filming her little limp it's not as pronounced because she wants to please," said Maggie's owner, Beth Phibbs. "She's just a great dog."
But a great attitude wasn't enough to repair a bad case of cervical spine arthritis.
So Monday, Beth brought Maggie to Banks Animal Hospital for the Stem Cell therapy. Like many, Beth had never heard of Stem Cell work in animals. "Until Dr. Banks mentioned it to me I was like, beg your pardon?"
"There's no down side, no side effects because you're using your own cells," said Dr Ken Banks.
Banks and his staff first gather some of Maggie's blood and fat. Both are good places to find the repair cells they're after. Adult stem cells, not the controversial embryonic kind, are then separated and spun down.
"The repair system in Maggie's body has failed," said Jason Richardson of MediVet-America. "It's fallen asleep at the wheel, we're taking these repair cells, activating them so a chronic condition like osteo arthritis to Maggie will now be an acute illness."
This kind of treatment used to take days with material being shipped across the country, but now it can be done in hours.
"The ability to do it same day, convenience, the ability to do it in clinic saves a lot of money to the doctor which he can then pass on to the patient," said Richardson.
The treatment will still run you around $2,000, but Richardson says that's half of what the similar treatment use to cost.
When it's over, Maggie should be able to live out her life pain and drug free -- something Phibbs is looking forward to.
"I'm hoping in a couple of weeks she's gonna have a new lease on life," said Phibbs.
Copyright 2012 WIS. All rights reserved.
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Vet offers stem cell therapy for dogs
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Trounson Predicts — ‘Optimistically’ — Successful California Stem Cell Treatments in Five Years
Posted: February 12, 2012 at 4:57 pm
Alan Trounson, president of the $3 billion California stem cell agency, says he is "optimistic" that some stem cell treatments developed in California will prove successful in humans in the next five years.
Trounson was quoted in The Sacramento Bee today in an opinion piece written by David Lesher, government affairs director of the Public Policy Institute of California. Lesher provided something of an overview of the agency, including pluses and minuses. He wrote,
"Those who speculate say that the most advanced stem cell treatments are still probably a decade away from becoming available to patients. And the cost to get them there will far exceed California's $3 billion investment."
But Lesher, a former political writer for the Los Angeles Times, also wrote,
"...(T)he president of the state's stem cell agency said he is 'optimistic' that at least a few California treatments will prove successful in humans in the next five years."
Lesher said,
"That may mean a genetically modified stem cell treatment to cure AIDS, (Trounson) said; it may mean a treatment that eliminates the need for some diabetics to monitor or inject insulin; there might be a treatment to restore eyesight to those suffering from a major cause of blindness.
"'These are the kind of things we need to get through,' he said. 'I hope that we have a number of them showing proof by 2015 or 2016. I'm optimistic. The caveat is that nothing is guaranteed.'"
The stem cell agency will run out of cash for new grants in 2017 and will go out of business shortly thereafter unless voters approve another multibillion dollar bond measure or it manages to secure private financing.
Lesher discussed the difficult financial environment for private financing of stem cell therapies and how it has changed since the the stem cell agency was created by voters seven years ago.
"The hope was that California's bond (financing for CIRM) would jump-start a biotech industry by building the laboratories and seeding early research to a point where private support would take over.
"But that point of commercial viability is a moving target as private investors have grown more risk averse and the regulatory path for such radical new therapies is unpredictable. So the biggest question today in the stem cell field is not whether the science will work someday. The big questions are how will we pay for it, how will regulators know when it's ready and when will it happen?"
Lesher said,
"The problem is that even the most advanced experiments in (CIRM's) translational portfolio are still a couple of years away from the same point in the regulatory pipeline where high cost and uncertainty forced Geron out of the field. And there is still no clear answer about how to resolve those same challenges, although the cost-benefit calculation will be different for other treatments."
Lesher concluded,
"Unlike high-speed rail, which continues to have strong support from the governor, the stakes surrounding California's stem cell investment have been largely invisible. That's too bad, because stem cell science is a much smaller investment for taxpayers with a greater possible return."
Our comment? In what CIRM Chairman Jonathan Thomas has declared as a "war" for public support, today's piece in The Bee was a bit of a victory. Although the article did mention difficult issues, it was generally upbeat about CIRM. The piece focused on the wonders of the science and bypassed many of the negatives about CIRM, including its built-in conflicts of interests and its reluctance to correct long-identified problems. Also absent was a discussion of how CIRM signed a $25 million loan agreement with Geron only three months before the company abandoned its clinical trial. That omission could be considered a PR plus for the agency. Overall, however, the folks at CIRM should be pleased by the article.
Source:
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California Stem Cell Agency Seeking More Help on Push for Cures
Posted: February 12, 2012 at 4:57 pm
The California stem cell agency has decided to put more manpower behind its push to drive therapies into the clinic.
The agency this week posted an opening for a senior development officer, who would be paid up to $226,108 annually.
The new hire would have a strong background in industry and an advanced degree. The job posting calls for a minimum of 10 years experience and expertise in "in developing, designing and assessing preclinical and early clinical safety and efficacy, within regulatory framework."
The position reports directly to Ellen Feigal, CIRM's VP for research and development. The job description says the person would "directly interact with investigators on CIRM’s clinically applicable research programs to help provide product development guidance from preclinical, manufacturing, and first in human to early phase clinical regulatory perspectives."
The $3 billion agency, which has yet to produce the cures promised to voters in 2004, is re-examining its strategies, particularly with an eye to backing a product that would actually be used on patients.
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A $25 Million ‘Cautionary Tale’: CIRM and Geron
Posted: February 12, 2012 at 4:57 pm
California's $25 million venture into the financing of what once was the first hESC clinical trial in the nation serves as a "cautionary tale" for states that use taxpayer dollars to boost technology, according to a New York public policy expert.
The comments by James W. Fossett, who directs the Rockefeller Institute of Government health, Medicaid studies and bioethics research programs, come midway through an Institute of Medicine examination of the performance of the $3 billion California stem cell agency. Its directors are also currently involved in a revision of of the agency's strategic plan.
Writing on the Rockefeller Institute's web site, Fossett analyzed the fallout from Geron's decision last fall to abandon its clinical trial after it determined the effort was too costly. Just three months earlier, the California stem cell agency had signed a $25 million loan agreement with Geron.
Fossett said,
"For the many states using taxpayer dollars to stimulate jobs in a wide range of technologies, this is a cautionary tale."
He wrote,
"(Geron's) decision has attracted widespread opprobrium from bloggers, stem cell advocacy groups, bioethicists and more than a few newspaper columnists — one blogger called it the 'stem cell misstep of the year.'
"This disapproval has also spilled over onto the California Institute for Regenerative Medicine (CIRM) — the state agency that operates the $3 billion California stem cell research program."
He continued,
"CIRM is coming under considerable political pressure to produce viable therapies to justify the large amount of money it’s been spending, and some have interpreted its hasty involvement with Geron as motivated by the desire to have something concrete to brag about."
Fossett said, however,
"There may be less here, however, than all the rhetoric would suggest. While Geron’s trial had acquired a lot of symbolic baggage because of its status as a 'first,' the decision to pull the plug only reflects one decision by one company about one therapy. The company was looking at having to spend a lot more money over a long period to get the therapy through the clinical trials process for what would likely be a small return.
"The political difficulties that Geron’s withdrawal have caused CIRM, however, have lessons for states proposing to spend significant amounts on biotechnology and other research in hopes of stimulating economic growth. Spending money on research intended to develop new therapies is highly risky. The science is difficult, expensive and evolves at a rapid pace that is difficult to integrate with earlier understandings. There are considerable cultural, political and financial obstacles to getting new products out of the lab and into the clinic."
Fossett suggested several approaches that might ease some of the risks. He cited the 2010 CIRM external review report that recommended adjusting priorities. Fossett said,
"States might experiment with providing more support to biotech companies and entrepreneurs with successful track records and less to basic research, which could increase the odds of short-term success."
At last month's CIRM board meeting, directors engaged in what CIRM is inclined to call a robust discussion of priorities for basic research vs. more focused funding for driving therapies into the clinic.
Fossett cited another external review recommendation that CIRM seek out research with a "high probability of clinical success that could 'come from either inside or outside CIRM-funded research, perhaps out of industry and even from outside of California.'"
Fossett additionally mentioned the use of venture capital techniques that would give states "a chance to participate in the (financial) benefits of successful therapies."
Nonetheless, he wrote,
"Most products and most companies will likely continue to fail."
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Last Public Hearing in California for CIRM Performance Evaluation Scheduled for April
Posted: February 12, 2012 at 4:57 pm
The blue-ribbon Institute of Medicine panel looking into the performance of the $3 billion California stem cell agency will hold its final public hearing within the state on April 10 at UC Irvine.
No details have yet have been posted online about the matters to be discussed or the witnesses to be heard. So far, the panel has not heard publicly from a single independent witness. The panel's final report and recommendations are scheduled to be released this fall, following its only remaining public meeting, scheduled for Washington, D.C.
The IOM has also posted a list of documents provided to the panel during a closed session last month in South San Francisco, its only public hearing in California so far. Virtually all of documents came from the CIRM itself, which is paying the IOM $700,000 for the study.
One exception was the 2009 report by California's good government agency, the Little Hoover Commission.
In its report, the commission concluded,
"CIRM’s governance structure is not adequate to protect taxpayers’ interests or serve its own ambitious goals."
The commission recommended a number of changes to strengthen CIRM's governance structure, improve accountability and reduce conflicts of interest. They included restructuring and reducing the size of the 29-member board and eliminating the controversial dual executive arrangement at CIRM.
CIRM strongly resisted nearly all of the recommendations, some of which would have required legislative or voter approval. As of last week, the IOM panel had not contacted the Little Hoover Commission for testimony.
(Click on the "closed session summary" at this location to find the information about the documents that were provided.)
The IOM also has posted a list of topics discussed by its panel in closed session last month. They included a follow-up on bias and conflicts of interest, committee composition, discussion of the previous day's hearing and discussion of data needs.
The April meeting is being held at the Beckman Center at UC Irvine, which has received $77 million from CIRM. The agency's board of directors includes two top academicians from UC Irvine: Oswald Steward, who serves on the board as a patient advocate and is director of the Reeve-Irvine Research Center for Spinal Cord Injury, and Susan Bryant, associate executive vice chancellor for research at Irvine and who serves on the CIRM board as in her capacity as an executive officer from a UC campus with a medical school.
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Trounson Predicts — 'Optimistically' — Successful California Stem Cell Treatments in Five Years
Posted: February 12, 2012 at 4:55 pm
Alan Trounson, president of the $3 billion California stem cell agency, says he is "optimistic" that some stem cell treatments developed in California will prove successful in humans in the next five years.
Trounson was quoted in The Sacramento Bee today in an opinion piece written by David Lesher, government affairs director of the Public Policy Institute of California. Lesher provided something of an overview of the agency, including pluses and minuses. He wrote,
"Those who speculate say that the most advanced stem cell treatments are still probably a decade away from becoming available to patients. And the cost to get them there will far exceed California's $3 billion investment."
But Lesher, a former political writer for the Los Angeles Times, also wrote,
"...(T)he president of the state's stem cell agency said he is 'optimistic' that at least a few California treatments will prove successful in humans in the next five years."
Lesher said,
"That may mean a genetically modified stem cell treatment to cure AIDS, (Trounson) said; it may mean a treatment that eliminates the need for some diabetics to monitor or inject insulin; there might be a treatment to restore eyesight to those suffering from a major cause of blindness.
"'These are the kind of things we need to get through,' he said. 'I hope that we have a number of them showing proof by 2015 or 2016. I'm optimistic. The caveat is that nothing is guaranteed.'"
The stem cell agency will run out of cash for new grants in 2017 and will go out of business shortly thereafter unless voters approve another multibillion dollar bond measure or it manages to secure private financing.
Lesher discussed the difficult financial environment for private financing of stem cell therapies and how it has changed since the the stem cell agency was created by voters seven years ago.
"The hope was that California's bond (financing for CIRM) would jump-start a biotech industry by building the laboratories and seeding early research to a point where private support would take over.
"But that point of commercial viability is a moving target as private investors have grown more risk averse and the regulatory path for such radical new therapies is unpredictable. So the biggest question today in the stem cell field is not whether the science will work someday. The big questions are how will we pay for it, how will regulators know when it's ready and when will it happen?"
Lesher said,
"The problem is that even the most advanced experiments in (CIRM's) translational portfolio are still a couple of years away from the same point in the regulatory pipeline where high cost and uncertainty forced Geron out of the field. And there is still no clear answer about how to resolve those same challenges, although the cost-benefit calculation will be different for other treatments."
Lesher concluded,
"Unlike high-speed rail, which continues to have strong support from the governor, the stakes surrounding California's stem cell investment have been largely invisible. That's too bad, because stem cell science is a much smaller investment for taxpayers with a greater possible return."
Our comment? In what CIRM Chairman Jonathan Thomas has declared as a "war" for public support, today's piece in The Bee was a bit of a victory. Although the article did mention difficult issues, it was generally upbeat about CIRM. The piece focused on the wonders of the science and bypassed many of the negatives about CIRM, including its built-in conflicts of interests and its reluctance to correct long-identified problems. Also absent was a discussion of how CIRM signed a $25 million loan agreement with Geron only three months before the company abandoned its clinical trial. That omission could be considered a PR plus for the agency. Overall, however, the folks at CIRM should be pleased by the article.
Source:
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Posted in Stem Cells, Stem Cell Therapy
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