Derivation of Embryonic Stem-Cell Lines from Human Blastocysts

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Abstract
Embryonic stem cells have the unique ability to form all adult cell types. Harnessing this potential may provide a source of cells to replace those that are lost or impaired as a result of disease. Moreover, the derivation of human embryonic stem cells opens a unique window into the study of early human development. At present, approximately 15 human embryonic stem-cell lines are publicly available, and they vary considerably in their usefulness for research and the extent of their characterization (see http://stemcells.nih.gov/registry/index.asp). To promote further research with human embryonic stem cells, we sought to derive and characterize more fully cell lines that meet strict criteria for ease of manipulation, including enzymatic passage with trypsin, streamlined freezing and thawing procedures, well-defined culture mediums, and straightforward methods for in vitro differentiation. We report the derivation and characterization of 17 additional human embryonic stem cell lines.