Monthly Archives: May 2012

Stem cells take root in drug development

Posted: Published on May 26th, 2012

Stem cells have assumed near-mythical status in the popular imagination as a possible cure for every disease under the sun. But while public attention has focused on their potential in regenerative medicine, stem cells have quietly gained a foothold in drug development a move that may hail a huge but unheralded shake-up of the biological sciences. I think there are tremendous parallels to the early days of recombinant DNA in this field, says James Thomson, director of regenerative biology at the Morgridge Institute for Research in Madison, Wisconsin, and one of the founders of Cellular Dynamics International, also in Madison. I dont think people appreciated what a broad-ranging tool recombinant DNA was in the middle '70s." At the same time, he says, they underestimated the difficulty of using it in treatments. Now stem cells are in a similar situation, he says, and although therapeutic use is likely to come to fruition eventually, people underappreciate how broadly enabling a research tool it is, he says. Laboratory-grown stem cells hold much promise for regenerative medicine, but are being increasingly used in drug testing. MASSIMO BREGA, THE LIGHTHOUSE/SCIENCE PHOTO LIBRARY Drug companies began dipping a tentative toe into the stem-cell waters about two … Continue reading

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From stem cell to brain cell – new technique mimics the brain

Posted: Published on May 26th, 2012

Public release date: 24-May-2012 [ | E-mail | Share ] Contact: Malin Parmar Malin.Parmar@med.lu.se 46-709-823-901 Lund University A new technique that converts stem cells into brain cells has been developed by researchers at Lund University. The method is simpler, quicker and safer than previous research has shown and opens the doors to a shorter route to clinical cell transplants. By adding two different molecules, the researchers have discovered a surprisingly simple way of starting the stem cells' journey to become finished brain cells. The process mimics the brain's natural development by releasing signals that are part of the normal development process. Experiments in animal models have shown that the cells quickly adapt in the brain and behave like normal brain cells. "This technique allows us to fine-tune our steering of stem cells to different types of brain cells. Previous studies have not always used the signals that are activated during the brain's normal development. This has caused the transplanted cells to develop tumours or function poorly in the brain", says Agnete Kirkeby, one of the authors of the study. Since the method effectively imitates the brain's own processes, it reduces the risk of tumour formation, one of the most common … Continue reading

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UC San Diego Scientists Net $12 Million For Stem Cell Research

Posted: Published on May 26th, 2012

Five UC San Diego scientists have received almost $12 million combined from the California Institute for Regenerative Medicine to pay for stem cell-based research, the university announced today. A team led by Lawrence Goldstein, of the Department of Cellular and Molecular Medicine and director of the UC San Diego Stem Cell Program, was given $1.8 million to continue looking for new methods to find and test possible medications for Alzheimer's disease, according to UCSD. They use reprogrammed stem cells in their work. Dr. Mark Tuszynski, professor of neurosciences and director of the Center for Neural Repair, received $4.6 million to develop more potent stem cell-based treatments for spinal cord injuries. Gene Yeo, assistant professor in the Department of Cellular and Molecular Medicine, was awarded $1.6 million to continue research into treatments for amyotrophic lateral sclerosis. His research hopes to take advantage of recent discoveries about ALS, or Lou Gehrig's disease, which center on mutations in RNA-binding proteins that cause dysfunction and death in neurons. Dr. Eric David Adler, an associate clinical professor of medicine and cardiologist, was granted $1.7 million to screen potential drugs for Danon disease, a type of inherited heart failure that frequently kills patients by their 20s. … Continue reading

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5 scientists receive stem-cell research grants

Posted: Published on May 26th, 2012

Five scientists from the University of California, San Diego and its School of Medicine have been awarded almost $12 million in new grants from the California Institute for Regenerative Medicine (CIRM) to conduct stem cell-based research into regenerating spinal cord injuries, repairing gene mutations that cause amyotrophic lateral sclerosis and finding new drugs to treat heart failure and Alzheimer's disease. The awards mark the third round of funding in CIRM's Early Translational Awards program, which supports projects that are in the initial stages of identifying drugs or cell types that could become disease therapies. More than $69 million in awards were announced yesterday, including funding for first-ever collaboratively funded research projects with China and the federal government of Australia. "With these new awards, the agency now has 52 projects in 33 diseases at varying stages of working toward clinical trials," said Jonathan Thomas, JD, PhD and CIRM governing board chair. "Californians should take pride in being at the center of this worldwide research leading toward new cures. These projects represent the best of California stem cell science and the best international experts who, together, will bring new therapies for patients." The five new UC San Diego awards are: CIRM was … Continue reading

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Fat stem cells may help treat kidney ailments

Posted: Published on May 26th, 2012

Fat stem cells may help treat kidney ailments BS Reporter / Mumbai/ AhmedabadMarch 06, 2007 In a breakthrough in the stem cell research, scientist from Ahmedabad have developed a technique to encourage a new kind of stem cells called Mesenchymal stem cells generated from fat (adipose tissue) of donors, which can be used in treating kidney diseases. Mesenchymal stem cells generated from fat of donors hold great promise for the treatment of kidney diseases, claims H L Trivedi, director, Institute of Kidney Diseases and Research Center (IKDRC), Ahmedabad. We will soon patent the research, he added. The institute will soon convene a meeting of scientists working on the project and take a decision on securing the patent for the research. A team of scientists from the IKDRC, led by Trivedi, has clinically proved that when presented in the right physical context, certain growth factors encourage the survival and proliferation of fat mesenchymal stem cells grown outside the body. Trivedi says the research offers hope of cent per cent recovery for patients suffering from severe kidney diseases as the mesenchymal stem cells will nullify the rejection rate of the body, thus inducing the body to accept the newly transplanted kidney as … Continue reading

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Cancer may require simpler genetic mutations than previously thought

Posted: Published on May 26th, 2012

ScienceDaily (May 25, 2012) Chromosomal deletions in DNA often involve just one of two gene copies inherited from either parent. But scientists haven't known how a deletion in one gene from one parent, called a "hemizygous" deletion, can contribute to cancer. A research team led by Stephen Elledge, a professor in the Department of Genetics at Harvard Medical School, and his post-doctoral fellow Nicole Solimini, has now provided an answer. The most common hemizygous deletions in cancer, their research shows, involve a variety of tumor suppressing genes called STOP genes (suppressors of tumorigenesis and proliferation) that scatter randomly throughout the genome, but that sometimes cluster in the same place on a chromosome. And these clusters, said Elledge, who is also a professor of medicine at Brigham and Women's Hospital, tend to be deleted as a group. "Eliminating the cluster gives a bigger bang for the deletion buck," he said. This finding is especially interesting in light of the two-hit model of cancer formation, which holds that both copies of a recessive gene need to be inactivated to trigger a biological effect. Thus the loss of a single tumor suppressor copy should have little or no influence on tumor cell proliferation … Continue reading

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Study: Knowing Genetic Makeup May Not Help Predict Disease Risk

Posted: Published on May 26th, 2012

BOSTON The great promise of the Human Genome Project is that if we can crack the genetic code in each of our cells, we may be able to predict what diseases we might get and prevent them. But more than a decade into this project, no medical miracles have been produced. Now, a new study by the Harvard School of Public Health has more disappointing news. WBURs All Things Considered host Sacha Pfeiffer spoke with the studys senior author, Peter Kraft, an associate professor of epidemiology at Harvard. Sacha Pfeiffer: Your study looked at one of the possible key reasons for why simply mapping the human genome as huge a scientific accomplishment as that is might not alone be enough to start curing or preventing diseases. What else have researchers thought might be necessary to do that? Peter Kraft: Weve actually been fabulously successful, in the last five years especially, in finding genetic variants that are associated with disease risk. But when people looked and asked the question, Do these actually help us predict whos going to be at high risk? the answer was mostly no. And one of reasons that might have been is that people looked at these … Continue reading

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Researchers develop new genetic method to pinpoint individuals' geographic origin

Posted: Published on May 26th, 2012

Public release date: 23-May-2012 [ | E-mail | Share ] Contact: Wileen Wong Kromhout wwkromhout@support.ucla.edu 310-206-0540 University of California - Los Angeles Understanding the genetic diversity within and between populations has important implications for studies of human disease and evolution. This includes identifying associations between genetic variants and disease, detecting genomic regions that have undergone positive selection and highlighting interesting aspects of human population history. Now, a team of researchers from the UCLA Henry Samueli School of Engineering and Applied Science, UCLA's Department of Ecology and Evolutionary Biology and Israel's Tel Aviv University has developed an innovative approach to the study of genetic diversity called spatial ancestry analysis (SPA), which allows for the modeling of genetic variation in two- or three-dimensional space. Their study is published online this week in the journal Nature Genetics. With SPA, researchers can model the spatial distribution of each genetic variant by assigning a genetic variant's frequency as a continuous function in geographic space. By doing this, they show that the explicit modeling of the genetic variant frequency the proportion of individuals who carry a specific variant allows individuals to be localized on a world map on the basis of their genetic information alone. "If … Continue reading

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Nobelist Speaks Out on Genetic Modification, Synthetic Biology, Stem Cell Research

Posted: Published on May 26th, 2012

ASTANA, Kazakhstan, May 24, 2012 /PRNewswire/ --Sir Richard Roberts, the eminent British biologist and Nobel Prize laureate, said today European opposition to genetically modified organisms is political rather than scientific in nature. He also said "personal medicine" based on human genome research holds large-scale promise to improve the health of the world's people on an individualized basis. Roberts, who won the Nobel in 1993 for his shared discovery of split genes, made his remarks at the Astana Economic Forum, a global conference of scientists, academics, multinational executives and government leaders. "On a political level, governments must embrace genetically modified organisms (GMOs) and not give way to European prophets of doom, who oppose the use of GMOs for purely political reasons," said Roberts. "It is important to note there is a complete absence of evidence that GMOs can cause any harm. Indeed to any well-informed scientist, traditionally bred plants seem much more likely to be harmful than GMOs." Roberts predicted growing knowledge of the human genome will yield better medical treatments and diagnostics. "It is just as important that we learn more about the bacteria that colonize our bodies since they are an essential part of what it means to be … Continue reading

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Knowing genetic makeup may not significantly improve disease risk prediction

Posted: Published on May 26th, 2012

Public release date: 24-May-2012 [ | E-mail | Share ] Contact: Marge Dwyer mhdwyer@hsph.harvard.edu 617-432-8416 Harvard School of Public Health Boston, MA Harvard School of Public Health (HSPH) researchers have found that detailed knowledge about your genetic makeupthe interplay between genetic variants and other genetic variants, or between genetic variants and environmental risk factorsmay only change your estimated disease prediction risk for three common diseases by a few percentage points, which is typically not enough to make a difference in prevention or treatment plans. It is the first study to revisit claims in previous research that including such information in risk models would eventually help doctors either prevent or treat diseases. "While identifying a synergistic effect between even a single genetic variant and another risk factor is known to be extremely challenging and requires studies with a very large number of individuals, the benefit of such discovery for risk prediction purpose might be very limited," said lead author Hugues Aschard, research fellow in the Department of Epidemiology. The study appears online May 24, 2012 and will appear in the June 8, 2012 print issue of The American Journal of Human Genetics. Scientists have long hoped that using genetic information gleaned … Continue reading

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