The United States experienced some setbacks in stem cell research during the Bush administration. In 2001, then President Bush limited federal funding of embryonic stem cell research to existing cell lines. Of the 60 lines at that time, only 21 were considered viable. Several states, including California and New Jersey, pushed their own funding to keep their research centers moving with the global effort to unlock the secrets of embryonic stem cells.
Why Embryonic Stem Cells Matter
Stem cells are present in the developing embryo and even in the adult human organism. However, embryonic stem cells have the potential to become any cell in any tissue of the human body (pluripotent), while adult stem cells tend to differentiate into a particular lineage, depending on the tissue in which they are found. Some experimental models, called induced pluripotency, have stimulated adult stem cells to do more, but scientists are still studying how to control the process .
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