JZA70
Banned
- Reaction score
- 59
Stem cells switch off and on, sometimes dividing to produce progeny cells and sometimes resting. But scientists don’t fully understand what causes the cells to toggle between active and quiet states. The researchers found cells produced by the stem cells, progeny known at Transit-Amplifying Cells or TACs, emit a signal that tells quiet hair follicle stem cells to become active.
Surprisingly, when Hsu blocked the ability of the quiescent stem cells to respond to Sonic Hedgehog, hair growth proceeded, but follicles were shorter, and with each round of hair cycling, the quiescent and primed stem cell populations were diminished, until hair regeneration failed altogether. These features are remarkably similar to what happens in male pattern baldness, according to the researchers. Although the root of this disorder may be further upstream than Sonic Hedgehog, this study provides new insights into the manifestations of hair loss, which in the long run will be necessary to develop new therapeutics, they say.
http://newswire.rockefeller.edu/2014/05/08/stem-cell-progeny-tell-their-parents-when-to-turn-on/
Surprisingly, when Hsu blocked the ability of the quiescent stem cells to respond to Sonic Hedgehog, hair growth proceeded, but follicles were shorter, and with each round of hair cycling, the quiescent and primed stem cell populations were diminished, until hair regeneration failed altogether. These features are remarkably similar to what happens in male pattern baldness, according to the researchers. Although the root of this disorder may be further upstream than Sonic Hedgehog, this study provides new insights into the manifestations of hair loss, which in the long run will be necessary to develop new therapeutics, they say.
http://newswire.rockefeller.edu/2014/05/08/stem-cell-progeny-tell-their-parents-when-to-turn-on/