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News Roundup [abridged Versions Appear In The Paper Journal]

All approved US embryonic stem cell lines may be contaminated

BMJ 2005; 330 doi: (Published 27 January 2005) Cite this as: BMJ 2005;330:214
  1. Janice Hopkins Tanne
  1. New York

The few stem cell lines approved in the United States are probably contaminated with a non-human molecule, says a study published online ahead of print publication in Nature Medicine ( The researchers recommend starting afresh with human embryonic stem cells that have never been exposed to animal products.

The authors, researchers at the University of California at San Diego and the Salk Institute in La Jolla, California, report that the human embryonic stem cells they studied are contaminated with non-human sialic acid that could cause rejection if the stem cells were transplanted into humans. “In …

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