Several previous attempts to purify bone marrow for sickle-cell transplants have failed.

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Aastrom Biosciences came to stem-cell work through bone marrow transplants.

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Dr Michael Seckl, a medical oncologist, and his team at the hospital found that treating cancerous cells with Taxol and stem cell infusion - an advanced form of bone marrow transplantation - was successful.

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Of the millions of people with sickle-cell disease in the world, only some 300 have received a bone marrow transplant because of age (doctors won't perform the procedure on patients 16 years and older) and donor-matching problems.

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