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Most Stem Cells Used in Research Come From Whites
Date:12/16/2009

Blacks, other minorities might not gain full benefit from breakthroughs, experts say,,

WEDNESDAY, Dec. 16 (HealthDay News) -- Human embryonic stem cell lines currently used for research come mostly from white donors, a new report finds.

That could mean that non-whites will benefit less from any medical breakthroughs that emerge from that research down the line, experts say.

Blacks could be especially affected. In fact, none of the most widely used stem cell lines studied showed any traces of recent African ancestry, the team reported online in a letter on Dec. 16 in the New England Journal of Medicine.

To increase the diversity of embryonic stem cell lines, the researchers urge increased efforts to include stem cells from other populations.

"We have examined the population ancestry of a large collection of human embryonic stem cell lines that are commonly used in research," said study co-author Noah Rosenberg, an associate professor in the department of human genetics at the University of Michigan, Ann Arbor.

"Most of these lines appear to derive from European or Middle Eastern populations," he added. Only two of the lines were linked to East Asians, and "none of these lines derive from populations with recent African ancestry," the researchers wrote.

Included in the embryonic stem cell lines Rosenberg's team examined are about 10 of the 20 embryonic stem cell lines recently approved by the U.S. National Institutes of Health for federally funded research.

This suggests that most of the research being done in this area is being done on a very small slice of the human population, Rosenberg noted.

The importance of stem cell lineage remains uncertain, he added. "We don't yet know the extent to which the ancestry of embryonic stem cell lines will affect the ultimate utility of therapies and drugs developed using stem cell research," he said.

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