Bdelloid rotifers evolving over the past forty million years without sex

February 5th, 2012 by admin | No comments »

We were up till now aware of the fact that sexual reproduction was the only means of bringing life into this world but a group of microscopic organisms seems to have broken this fact. A recent study has found out that since the past forty million years Bdelloid rotifers were evolving without sex. These aquatic animals thrive in wet areas and are asexual. In this case the Bdelloid rotifers produce eggs which are genetic clones of the mother and above all there is no male species, just females out there doing their job. That sounds amazing!! We are all aware of the fact that asexual animals cannot evolve and mutate over a period of time but study of the fossil records of bdelloid rotifers has stated that their existence can be traced back to forty million years. Up till now it was thought that sexual reproduction was important for spitting into divergent species but this has shocked everybody and also left a question to be answered as to how these species have been able to diverge without the addition of any genetic material. Via cbc

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Soluble Omega-3 fats for cosmetics developed by Zymes

February 5th, 2012 by admin | No comments »

A water soluble omega 3 fatty acid has been developed by Zymes using nanotechnology for cosmetic applications. Since Omega 3 has got a dense composition of oil therefore at times it becomes difficult for formulating it with other ingredients. Here nanotechnology comes into picture as it offers increased solubility along with bioavailability and particle size reduction at nanometer level which leads to increased opportunities for companies looking to supplement their products with natural functional ingredients. Ubisol-Aqua from Zymes implements nanotechnology for improving the solubility of drugs and ingredients which are water insoluble and hence it becomes difficult for the human body to absorb it. The company has developed an omega 3fatty acid with 34 nanometers which implies that smaller particles could be absorbed easily into the skin or hair shaft of the user. It is also expected to increase the health benefits to the consumers. Via cosmeticdesign

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Ruckus over FDA’s approval to food from cloned animals

February 5th, 2012 by admin | No comments »

The Food and Drug Administration is facing criticism over its recent preliminary approval to food from cloned animals as a consumer group has charged the agency for using flawed analysis. According to the Center for Food Safety, the FDA could not find studies on milk or meat from clones and whether they’re safe and the agency relied on studies done on cloned animals and whether they appeared healthy. Claiming that the conclusions drawn by the FDA was based on ‘scant data from few peer-reviewed studies’, Charles Margulis, a spokesman for Center for Food Safety, said: There isn’t the science to show that these foods are safe. I think the agency was heavily influenced by the biotechnology industry. Though FDA was tight lipped, Val Giddings, a scientist who consults with biotechnology companies, has come forward in FDA’s defence. According to Giddings an exhaustive amount of peer-reviewed data was the base of the conclusion. Giddings said: There’s not a single shred of data to suggest that food derived from clones or their offspring is in any way unsafe. All of what FDA has done here has been completely transparent. The FDA found that food from clones and food from conventional livestock has no virtual difference between and therefore special labels for cloned food would be necessary. Center for Food Safety might be in the process of waging a war against the FDA but Dean Foods Co. of Dallas has already decided to go against the idea of cloned food. Nations biggest milk company has decided it would not sell milk from cloned cows. The company’s decision was influenced by various surveys suggesting the dislike for dairy products from clones by Americans. Source.

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South Korea again gives a go ahead to use of human eggs in cloning research

February 5th, 2012 by admin | No comments »

South Korea is playing a risky game as it has given the permission for using human eggs in cloning research despite a high level scandal in their country which involved one of their top scientists admitting to his involvement in doctored research work. Hwang Woo-suk was the scientist who had claimed that he had cloned human embryos and extracted stem cells from them but it was found out that all his claims were false. What raised eyes were when eggs required for research were donated by a female scientist in his team and this questioned the ethics of such practice. This shameful incident caused Hwang Woo-suk to resign from his post at the Seoul National University and is now facing trial for misappropriation of government funds. In order to get over the shameful act the government has again given a go ahead to use of human eggs in cloning but this time with an act of caution and under a new set of guidelines has asked that researchers should only use eggs which are to be destroyed after fertility treatments or from other legal ways and a prior license would have to be obtained from the government for undertaking research. It seems this time South Korea wants to take no chances. Via theage

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B-12 vitamin puzzle solved by MIT biologist

February 5th, 2012 by admin | No comments »

This mystery had troubled researchers for decades but Harvard and MIT researchers have finally been able to join all the pieces together. They have been able to figure out the last link of the synthesis pathway of vitamin B-12. This vitamin makes an immense contribution to the health of human beings. The researchers found out that a single enzyme synthesis the fragment and this outlines a new reaction mechanism which requires cannibalization of another vitamin. Graham Walker, Professor of biology, MIT stated: The work, which has roots in an MIT undergraduate teaching laboratory, completes a piece of our understanding of a process very fundamental to life. Researchers have now come to know that a mutant which has a defective form of enzyme known as BluB results ion B12 not being synthesized. Now a question which still needs to be solved is at to why soil bacteria synthesize B12 at all. Let’s hope the researchers come up with an answer for this question too. Via biologynews

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New technology licensed by Pain Therapeutics for treating hemophilia

February 5th, 2012 by admin | No comments »

Do you know that Hemophilia is a rare inherited blood clotting disorder which affects more than 4, 00,000 people worldwide? In order to cure this disease, Pain Therapeutics has licensed a new technology for treatment of this disorder. It was Stanford University School of Medicine which originally developed this technology and it would be entering the clinic by 2008. Remi Barbier, President and CEO, Pain Therapeutics stated: This licensing is part of our strategy to develop novel drug candidates in hematology/oncology, while maintaining a business model that requires a modest outlay of cash. Within a year the company would be developing a novel drug candidate which would be targeting major mechanism underlying hemophilia. Though the basic research would be undertaken at Stanford Pain Therapeutics would be focusing on the clinical program. Let’s hope that this time we are able to eradicate this disease from this world. Via prnewswire

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Nano Improved Transformer Oil

February 5th, 2012 by admin | No comments »

Rice University scientists have created a nano-infused oil that could greatly enhance the ability of devices as large as electrical transformers and as small as microelectronic components to shed excess heat. Research in the lab of Rice materials scientist Pulickel Ajayan, which appears in the American Chemical Society journal ACS Nano, could raise the efficiency of such transformer oils by as …Source:
http://news.search.yahoo.com/news/rss?ei=UTF-8&p=nano+engineering&eo=UTF-8

Genetic Technologies Files Quarterly Activities Report and ASX Appendix 4C for Quarter Ended December 31, 2011

February 5th, 2012 by admin | No comments »

MELBOURNE, AUSTRALIA– – Genetic Technologies Limited today announced it has filed its Quarterly Activities Report and Appendix 4C for period ending December 31, 2011 in accordance with the ASX.Total cash …Source:
http://news.search.yahoo.com/news/rss?ei=UTF-8&p=genetic+therapy&eo=UTF-8

Funding for Personalized Medicine Research

February 5th, 2012 by admin | No comments »

The Cancer Stem Cell Consortium (CSCC) is a partner in the 2012 Large-Scale Applied Research Project Competition of Genome Canada, in collaboration with the first phase of the Personalized Medicine Signature Initiative of the Canadian Institutes of Health Research (CIHR). Genome Canada is leading the research competition. An excerpt from Fact Sheet: The Potential of Personalized Medicine:

Funding of $67.5M will come from Genome Canada ($40 million), CIHR ($22.5 million) and the Cancer Stem Cell Consortium ($5 million). Projects will be funded for a maximum of four years. To qualify for funding, researchers must obtain matching funding that at is least equal to that provided through the competition, which will bring the total investment in this research area to close to $140 million. Matching funding is typically derived from provincial, academic, private sector or international sources.

Details about the competition are available here.

Press releases, dated January 31, 2012, about the federal government’s support for personalized medicine, are available here and here.

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Researchers turn skin cells into neural precusors, bypassing stem-cell stage

February 5th, 2012 by admin | No comments »

Mouse skin cells can be converted directly into cells that become the three main parts of the nervous system, according to researchers at the Stanford University School of Medicine. The finding is an extension of a previous study by the same group showing that mouse and human skin cells can be directly converted into functional neurons.Source:
http://news.search.yahoo.com/news/rss?ei=UTF-8&p=IPS+stem+cells+therapy&eo=UTF-8

Adult stem cells testing offers promising results

February 5th, 2012 by admin | No comments »

I must admit that, the more I read about what stem cells — especially adult (or "tis-sue") stem cells that are not under the current res-trictions on the use of embryonic stem cells — the more I am incredibly impressed at the growing successful results of the use of such stem cells, especially in trials where they have been so successful in research and testing results literally around the …Source:
http://news.search.yahoo.com/news/rss?ei=UTF-8&p=stem+cells&eo=UTF-8

Oxford, Harvard scientists lead data-sharing effort

February 5th, 2012 by admin | No comments »

Led by researchers at University of Oxford (UK) and the Harvard Stem Cell Institute (HSCI) at Harvard University, (USA), more than 50 collaborators at over 30 scientific organizations around the globe have agreed on a common standard that will make possible the consistent description of enormous and radically different databases compiled in fields ranging from genetics to stem cell science, to environmental studies. (2012-01-30)Source:
http://www.brightsurf.com/rss.news.xml?search=Stem_Cells

PRWEB: Absorption Systems Expands In Vivo Drug and Medical Device Testing Capabilities

February 5th, 2012 by admin | No comments »
Preclinical contract research organization renovates facility, adding state-of-the-art technology and upgrading ocular testing services.
Exton, PA (PRWEB) January 31, 2012
Absorption Systems announces the latest in a series of milestones in the continuing expansion of its AAALAC-accredited and GLP-compliant facility in San Diego, CA. The facility is undergoing extensive renovations to upgrade and expand the company’s in vivo testing capabilities for drugs and medical devices, including the construction of a dedicated ocular testing laboratory with state-of-the-art equipment, including a Heidelberg Spectralis® optical coherence tomography (OCT) unit. This instrument produces detailed digital images of the retina, enabling precise monitoring of the efficacy and toxicity of drugs and medical devices. Absorption Systems’ San Diego facility, in the midst of a major expansion of staff, equipment, and capabilities in the specialized area of preclinical ocular drug and device testing, continues to see significant growth year-over-year early in 2012.
Glenwood Gum, M.S., Ph.D., who joined Absorption Systems in 2011 as Associate Director, Preclinical Studies, commented, “This OCT technology gives a huge boost to our ocular testing capabilities, which will immediately benefit our rapidly expanding client base.” Dr. Gum is an expert in preclinical ocular studies, having developed or co-developed many of the preclinical models of glaucoma, age-related macular degeneration (AMD), retinoblastoma, uveitis, and diabetic retinopathy that are used all over the world for drug testing. His expertise, along with dedicated staff and the addition of state-of-the-art equipment and facilities, are key to Absorption Systems’ strategy to aggressively pursue new business opportunities in the preclinical ocular testing arena.
Dr. Gum will be a featured speaker on Preclinical Glaucoma and CNV Models at the 4th Ocular Diseases and Drug Discovery conference in Las Vegas, NV February 27-28, 2012.
Patrick Dentinger, President and CEO of Absorption Systems, said, “For Absorption Systems, being a market leader in whatever endeavor we pursue is a cornerstone of our business philosophy. This requires scientific expertise, state-of-the-art equipment and facilities, and access to emerging technologies. These factors, combined with Absorption Systems’ customer-centric approach, make our commitment to being a top-tier ocular service provider a reality in 2012.”
Absorption Systems’ preclinical ocular test portfolio includes in vivo ocular pharmacokinetics, efficacy, and safety in multiple species, as well as in vitro ocular permeability and metabolism. For example, the human corneal orb is a unique in vitro permeability model available as a service platform only through Absorption Systems. The corneal orb, cultured from human pluripotent stem cells, was developed by Lifeline Cell Technology, Inc., a wholly-owned subsidiary of International Stem Cell Corporation, and has been validated by Absorption Systems as an in vitro corneal permeability test system.
About Absorption Systems
Absorption Systems, founded in 1996, assists pharmaceutical and medical device companies in identifying and overcoming ADMET (Absorption, Distribution, Metabolism, Excretion and Toxicity) barriers in the development of drugs and medical devices. The company’s mission is to continually develop innovative research tools that can be used to accurately predict human outcomes or to explain unanticipated human outcomes when they occur. The CellPort Technologies® platform, a suite of human cell-based test systems for drug transporter characterization, exemplifies Absorption Systems’ commitment to innovation and is soon to be an industry assay standard for in vitro drug interaction assessment. Absorption Systems has facilities near Philadelphia, PA, and San Diego, CA, and serves customers throughout the world. For information on the company’s comprehensive contract services and applied research programs, please visit http://www.absorption.com.



SOURCE: http://www.prweb.com/releases/2012/1/prweb9153045.htm

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CGS: Broader Perspective Needed in IOM-CIRM Performance Evaluation

February 5th, 2012 by admin | No comments »


The Center for Genetics and Society has filed a brief statement with the Institute of Medicine panel examining the performance of the California stem cell agency, expressing the hope that the inquiry will include “a broader range of sources.”

Marcy Darnovsky, associate executive director of the Berkeley group, said that “a meaningful review by (the IOM) committee could make an important contribution to needed changes at the agency.” Darnovsky’s organization has followed the stem cell effort since its inception.

She noted that CIRM is “a public agency spending increasingly scarce public resources” and has raised the possibility of seeking another multibillion dollar bond measure from voters.

The IOM inquiry has finished half of its public process and is yet to hear an independent analysis of the stem cell agency, which is paying $700,000 for the study.

Earlier Darnovsky told the California Stem Cell Report that the Institute of Medicine has not contacted her organization for comments, although she has spoken with the public relations person for the IOM.

Here is the text of Darnovsky’s statement sent to the IOM.

“The Center for Genetics and Society is a public interest organization working to ensure responsible uses and effective societal governance of human genetic and reproductive technologies.  We support embryonic stem cell research, but have been concerned for some years about a number of aspects of the field, and of the California Institute of Regenerative Medicine in particular.

“We have been closely following CIRM since the campaign for Proposition 71 that established it in 2004. We have attended numerous meetings of the agency’s governing board and Standards Working Group, worked with other public interest groups who share our concerns about CIRM, written frequently about CIRM in our publications, and been cited dozens of times in articles about CIRM in key state and national news outlets.

“In 2006, we published The California Stem Cell Program at One Year: A Progress Report, which assessed CIRM’s performance to that date and offered recommendations. See http://www.geneticsandsociety.org/downloads/200601report.pdf

“In 2008, CGS policy analyst Jesse Reynolds gave invited testimony to the Little Hoover Commission’s hearing on CIRM. See http://www.geneticsandsociety.org/article.php?id=4386

“We are encouraged that the Institute of Medicine is undertaking an independent assessment of CIRM, though we hope that you will invite input from a broader range of sources than were represented at the meeting last month in San Francisco. With key questions about the future of CIRM unresolved, and its leadership contemplating a campaign for another bond measure.

“As I wrote in a recent commentary that expressed our disappointment with the roster of speakers at last month’s hearing,

“Ballot measure or no ballot measure, CIRM will continue to disperse the public money it controls – another billion and a half dollars. This is a public agency spending increasingly scarce public resources. It is funding a field of research in which we place great hopes for medical and scientific advances. These factors make it all the more crucial that CIRM follow the basics of good governance and public accountability, and eschew the hyperbole and exaggerated promises that have tainted stem cell research for so long.

“See  http://www.geneticsandsociety.org/article.php?id=6045

“Please let us know if we can be of help. We would be very glad to share our insights and recommendations.”

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IOM Coming Up Short on Independent Analysis of the California Stem Cell Agency

February 5th, 2012 by admin | No comments »


The blue-ribbon panel examining the performance of the $3 billion California stem cell agency is midway through its public process and is yet to hear from a single independent witness during its open sessions.

The panel’s report and recommendations are due this fall and are expected to have a major impact on the seven-year-old agency and its future.

So far, the IOM panel has heard only from employees or directors of the agency and persons representing institutions that have received $418 million in CIRM cash.

The panel of scientists and academics was put together by the prestigious Institute of Medicine under a $700,000 contract with the stem cell agency itself. At the 2010 meeting during which agency directors approved the contract, they expressed hope that the IOM panel’s findings would bolster public support for another multibillion dollar bond measure for the agency, which expects to run out of funds for new grants in 2017.

Last week, the California Stem Cell Report asked the IOM about its plans to gather independent or critical information about the stem cell agency’s performance. With only one more California public meeting scheduled, the IOM said that it is seeking the “full range of perspectives” but did not respond directly to questions about the specifics of how it is going to fulfill that task.

None of the four organizations in California that have an independent perspective on CIRM have been contacted by the IOM, the California Stem Cell Report has been told. They are the state’s Little Hoover Commission, the Center for Genetics and Society, Consumer Watchdog and the Citizens Financial Accountability and Oversight Committee, which is the only state body specifically charged with oversight of CIRM and its directors and which is chaired by the state’s top fiscal officer, Controller John Chiang. A spokeswoman for the IOM panel said, however, it plans to touch base with at least some of the four.

In response to questions from the California Stem Cell Report, Christine Stencel, the IOM spokeswoman, said the IOM also wants to hear comments from businesses whose applications have been rejected by CIRM. However, she said the panel is still working on “ways to get them.” She did not respond directly to questions about how many of such businesses would be interviewed or how they would be selected. The tiny number of CIRM grants to business is a sore spot with industry. Even directors and CIRM’s own “external review” panel have said much more is needed.

In response to a question about complaints about conflicts of interest on the part of CIRM reviewers, Stencel was also non-specific, saying only that the panel wants to “obtain all relevant insights.” She did not respond directly to a question about whether the panel would examine “private complaints” filed with CIRM by rejected applicants.

Currently the IOM has forms posted online that interested parties, if they know about the existence of the forms, can use to comment on CIRM. We asked whether the panel plans to do more than passively post the forms, specifically whether it plans to email them to all CIRM applicants who were rejected. We also asked about IOM plans to follow up to generate an adequate response. Stencel said the IOM is “proactively working” to get survey responses but did not say what specific steps it was taking.

Our comment?

The IOM has a well-deserved reputation for rigor and thoroughness. However, the IOM is all but unknown to 99 pecent of the public, which will be the ultimate consumer of its findings on the stem cell agency. The fact that the IOM is being paid $700,000 by CIRM will undoubtedly raise questions in the minds of some about IOM’s own objectivity. The panel itself consists of persons who have like-minded interests and sympathy with CIRM and its 485 grant recipients. No member of the panel is likely to publicly discourage more scientific research, even if CIRM is deemed to be failing to fulfill the voters expectations in 2004 when they created the agency. All the more reason to aggressively seek out those with contrary views about CIRM’s performances, if the IOM’s report is to have maximum credibility.

Earlier this week we heard from a knowledgeable and longtime observer of the research scene, who said that the IOM looks at things “differently than regular people” and views scientists who receive funding from CIRM as “independent.” The IOM’s Stencel responded by reiterating that the IOM is seeking the full range of information from the full range of sources.

The IOM evaluation of CIRM’s performance is much too far along not to have progressed further with its attempts to hear from independent and critical voices about CIRM. Generalizations to the effect that “we are going to get to it” do not serve the panel well. The IOM should lay out publicly and quite specifically its plans to aggressively seek thoughtful analysis from parties that do not have financial or professional links to CIRM, as well as from those who feel they have received a short shrift from the $3 billion enterprise.

You can read the full text of the questions from the California Stem Cell Report and the IOM responses here.

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Text of IOM Responses to Questions about Lack of Independent Analysis

February 5th, 2012 by admin | No comments »


Here is the text of questions from the California Stem Cell Report and answers from the Institute of Medicine concerning its plans to secure independent perspectives during the IOM’s examination of the California stem cell agency. So far, the IOM has not heard publicly from any independent sources.

Christine Stencel, a spokeswoman for the IOM, responded for the IOM. She first gave an overall statement. Then she answered the specific queries. We have inserted the questions from the California Stem Cell Report into her text  in order to make the Q&A easier to follow.

The IOM’s general comment:

“The committee and staff are planning their next info gathering sessions. Specifics of these events haven’t all been worked out yet, but one overall point is that the committee believes it is important to hear the full range of perspectives and experiences with CIRM and the committee members are actively pursuing sources of information that will allow them to adequately answer the questions they’ve been tasked to explore. The study is ongoing and there are still a lot of people and resources to tap and information to learn.

“To your specific questions:”

California Stem Cell Report:

“Does the IOM have plans to talk with or seek statements from such groups as the Little Hoover Commission and the Center for Genetics and Society or state Controller John Chiang?”

IOM response:

“Yes. And the committee is reading all the past reviews of CIRM.”

California Stem Cell Report:

“Does the IOM plan to seek comments from grant applicants rejected by CIRM, particularly businesses? If so how many? How would such applicants be selected by the IOM for interviews or comments?”

IOM response:

“Yes, the committee wishes to hear these perspectives and is seeking ways to get them.”

California Stem Cell Report:

“Does the IOM plan to do more than passively post forms for comment from others? Does it plan to email those forms, for example, to all CIRM grant recipients and applicants who were rejected? Does it plan to follow up to be sure an adequate response is generated?”

IOM response:

“The IOM is proactively working to get survey responses and encouraging people to respond.”

California Stem Cell Report:

“What does the IOM mean by ‘industry partners’ on its (online) forms for comment?”

IOM response:

“Industry partners means CIRM investigators representing for-profit companies.”

California Stem Cell Report:

“Does the IOM plan to examine both public and private complaints about conflicts of interest on the part of CIRM grant reviewers? By private, I mean written complaints to CIRM that the agency retains but has not made public.”

IOM response:

“The committee is looking into the grants review process and working to make sure that the members obtain all relevant insights and information. The committee members intend to invite people who can provide a broad range of experiences with and perspectives of CIRM to the upcoming meeting in April.”

The California Stem Cell Report later asked the IOM if it wanted to comment on a quote that we were considering using, which said,

“In the eyes of the IOM, scientists who draw funding from CIRM and other sources are ‘independent.’ They look at these things differently than regular people would.”

The IOM responded,

“As to the quote you sent, as a response we would just reiterate that the committee is methodically going about its task and during the course of the study aims to gather the full range of information, experiences, and insights relevant to CIRM from a full range of sources.”

Source:
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Stem Cell Researchers ‘Uneasy" in California

February 5th, 2012 by admin | No comments »


The prestigious journal Nature today said that asking California voters for more billions for stem cell research in a few years “may strike residents as a luxury that they can ill afford.”

The comment came in a piece by Erika Check Hayden dealing with the future of the California stem cell agency, which is expected to run out of money for new grants in about 2017. She wrote,

“Given that California is facing severe budget shortfalls, several billion dollars more for stem-cell science may strike residents as a luxury that they can ill afford. It may also prove difficult for CIRM’s supporters to point to any treatments that have emerged from the state’s investment. So far, the agency has funded only one clinical trial using embryonic stem cells, and that was halted by its sponsor, Geron of Menlo Park, California, last November.

“Yet the institute has spent just over $1 billion on new buildings and labs, basic research, training and translational research, often for projects that scientists say are crucial and would be difficult to get funded any other way. So the prospect of a future without CIRM is provoking unease. ‘It would be a very different landscape if CIRM were not around,’ says Howard Chang, a dermatologist and genome scientist at Stanford University in California.”

Chang was a scheduled witness recently at a public meeting in California of the blue-ribbon Institute of Medicine panel examining the performance of the Golden State’s $3 billion stem cell research effort. Chang is the recipient of $3.2 million in CIRM funding. Hayden wrote,

“Chang has a CIRM grant to examine epigenetics in human embryonic stem cells, and is part of another CIRM-funded team that is preparing a developmental regulatory protein for use as a regenerative therapy. Both projects would be difficult to continue without the agency, he says. Federal funding for research using human embryonic stem cells remains controversial, and could dry up altogether after the next presidential election (see Nature 481, 421–423; 2012). And neither of Chang’s other funders — the US National Institutes of Health (NIH) and the Howard Hughes Medical Institute in Chevy Chase, Maryland — supports his interdisciplinary translational work. Irina Conboy, a stem-cell engineer at the University of California, Berkeley, who draws half of her lab’s funding from CIRM, agrees that in supporting work that has specific clinical goals, the agency occupies a niche that will not easily be filled by basic-research funders. ‘The NIH might say that the work does not have a strong theoretical component, so you’re not learning anything new,’ she says.”

Conboy was also a scheduled witness at the IOM hearing. She holds $2.2 million in CIRM grants.

Source:
http://californiastemcellreport.blogspot.com/feeds/posts/default?alt=rss

Stem cells could bring back vision for a Wakefield business owner

February 4th, 2012 by 59anton | No comments »

A BAR owner from Wakefield has become the first person in Europe to have limited eyesight treated with embryo stem cell research.

Go here to read the rest:
Stem cells could bring back vision for a Wakefield business owner

Blacks urged to donate blood, stem cells

February 4th, 2012 by Nikol_gauth | No comments »

An urgent shortage of blood and stem cells in the black community is costing lives, Canada's blood agency warns.

See the article here:
Blacks urged to donate blood, stem cells

Hepatitis Research May Benefit From Stem Cells

February 4th, 2012 by missfema | No comments »

Editor's Choice
Main Category: Liver Disease / Hepatitis
Also Included In: Stem Cell Research
Article Date: 03 Feb 2012 – 11:00 PST

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Hepatitis C is a viral disease that leads to inflammation and organ failure. However, researchers are puzzled as to why some individuals are very susceptible to the disease, while others are not.

Researchers believe they could find out how genetic variations produce these different responses by investigating liver cells from different individuals in the lab. However, liver cells are hard to obtain and extremely challenging to grow in a lab dish as they often lose their normal function and structure when removed from the body.

Now, scientists from MIT, Rockefeller University and the Medical College of Wisconsin have found a technique to generate liver-like cells from induced pluripotent stem cells (iPSCs). iPSCs are created from body tissues instead of embryos; the liver-like cells that can be infected with hepatitis C. iPSCs could allow researchers to investigate why individuals respond differently to the disease. The study is published in the Proceedings of the National Academy of Sciences.

Although many research terms have tried to established an infection in cells obtained from iPSCs, this study is the first to have done so. In addition, the new technique could eventually facilitate “personalized medicine.” Using tissues obtained from the patient being treated, doctors could test the effectiveness of various medications and customize a treatment for that individual patient.

This study is a joint effort between Sangeeta Bhatia, the John and Dorothy Wilson Professor of Health Sciences and Technology and Electrical Engineering and Computer Science at MIT; Charles Rice, a professor of virology at Rockefeller; and Stephen Duncan, a professor of human and molecular genetics at the Medical College of Wisconsin.

In 2011, Bhatia and Rice revealed that by growing liver cells on special micropatterned plates that direct their organization, they could influence the cells to grow outside the body. Although, these cells can be infected with hepatitis C, researchers cannot proactively research the role of genetic variation in viral responses, as the cells derive from organs donated for transplantation and represent only a small population.

Bhatia and Rice collaborated with Duncan, who had demonstrated that he could transform iPSCs into liver-like cells, in order to produce cells with more genetic variation.

Often, such iPSCs are taken from skin cells. Researchers can restore these cells to an immature state – the same as embryonic stem cells – which can differentiate into any cell type by switching on specific genes in those cells. The cells can then be directed, once they become pluripotent, to become liver-like cells by switching on genes that regulate liver development.

In this study, MIT postdoc Robert Schwartz and graduate student Kartik Trehan infected those liver-like cells with hepatitis C. They created the viruses to expel a light-producing protein each time they went through their life cycle in order to confirm that infection had taken place.

The primary goal for the team is to obtain cells from individuals who had unusual reactions to hepatitis C infection and transform them into liver cells in order to research their genetics to find out why they responded the way they did.

Bhatia explains:

“Hepatitis C virus causes an unusually robust infection in some people, while others are very good at clearing it. It's not yet known why those differences exist.”

One possible reason may be genetic variations in the expression of immune molecules, such as interleukin-28, a protein that has been demonstrated to play a vital role in the response to hepatitis infection. Other potential factors include, cell's susceptibility to having viruses control their replication machinery and other cellular structures, as well as cell's expression of surface proteins that allow the virus to penetrate the cells.

Bhatia explains the liver-like cells generated in this investigation are similar to “late fetal” liver cells. The team is currently working on producing more mature liver cells.

The long-term goal for the team is personalized treatments for individuals with hepatitis. According to Bhatia one could imagine obtaining cells from an individual, making iPSCs, reprogramming them into liver cells and infecting them with the same strain of hepatitis that the individual has. This would allow doctors to test various medications on the cells to find out which ones are better at clearing the infection.

Written by Grace Rattue
Copyright: Medical News Today
Not to be reproduced without permission of Medical News Today

Visit our liver disease / hepatitis section for the latest news on this subject.

Source: MIT

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4 Feb. 2012. <http://www.medicalnewstoday.com/articles/241164.php>

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