Responsible for a hair loss recognized stem cells

The American researchers from University of Pennsylvania by experiences established that responsible for baldness at people is a certain type of stem cells. They brake action of usual stem cells which are responsible for growth of hair at mammals and people. In 2006-2007 the professor of University of Pennsylvania George Kotsarelis by practical consideration found out that stem cells directly are responsible for scalp growth at mice. It and his colleagues entered to experimental mice embryonic stem cells. As a result growth rate of hair at mice increased by 60-70 percent. Similar experiences with success were also repeated in France, Great Britain and Japan. However at the solution of an essential task – how to get rid of a hair loss at people, it became clear that stem cells can and break scalp growth, leading to baldness. During experiments Kotsarelis proved that the certain type of stem cells containing in hair follicles – so-called “old cages” or "cages predecessors", can block action of usual cages. As a rule, baldness begins in that site where the maintenance of "harmful" stem cells exceeds norm. Further they counteract usual cages and finally the person grows bald. Now Kotsarelis and his colleagues intend to find out, for what reasons there is this "failure" and in follicles concentration of "abnormal" stem cells which are responsible for baldness increases.