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Novel Liver Stem Cell Model Could Speed Up Process for Developing New Drugs
Date:6/11/2013

Durham, NC (PRWEB) June 11, 2013

The path to bringing a new drug to market is, simply put, a rocky one. Not only is it estimated to take over 12 years at an average price tag running anywhere between US $800 million and US $2 billion, but more often than not the new drug never makes it through the process.

But now a research team reports that it has developed a way to speed up the process. Their work, which involves the creation of a highly stable and sensitive liver stem cell model, is reported in the latest issue of STEM CELLS Translational Medicine.

“Liver toxicity is the second most common cause of human drug failure,” explained David Hay, Ph.D., of the University of Edinburgh’s MRC Centre for Regenerative Medicine, who led the team made up of university colleagues and scientists from Bristol-Myers Squibb, Princeton, N.J. “But one major bottleneck in safety testing new drugs has been finding a routine supply of good quality primary human hepatocytes from the desired genetic background.”

Scientists have long believed that finding an efficient way to force pluripotent stem cells (PSCs) to develop into hepatocytes — liver cells — could be the way around the problem. “But faithfully recapitulating human physiology in a dish from a renewable source remains a holy grail for medicine and the pharmaceutical industry,” Dr. Hay noted.

“Many procedures have been described that, to a limited extent, exhibit human-tissue-specific function in vitro but incomplete cellular differentiation and/or the loss of cell phenotype after they differentiate. Using our knowledge in pharmacology, stem cell biology and materials chemistry, we developed a highly stable and sensitive model.”

Their method involved expanding PSCs and driving their differentiation to hepatocytes, then replating them onto a synthetic surface. The results yielded active cell populations that displayed stable function for over two weeks in
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