| Abstrakt: |
Scientists at Johns Hopkins School of Medicine report in the March 2003 issue of the journal "Stem Cells," that human embryonic stem (ES) cells, obtained from the University of Wisconsin, retain their primitive nature when grown on the stromal cells. Scientists have discovered that primitive human ES cells, temperamental in the lab, can be grown with the help of special cells from bone marrow, offering an easily obtained and well-studied source of human cells to nurture the human ES cells as they divide. First announced in 1998, human embryonic stem cells are usually grown in the lab on a feeder layer of mouse cells. Feeder cells send as yet unknown signals to the primitive human ES cells, preventing them from turning into more grown-up cell types, such as bone, fat, or brain cells. Researchers on the study are Linzhao Cheng, Holly Hammond, Zhaohui Ye, Xiangcan Shan, and Gautam Dravid of Johns Hopkins School of Medicine. |
