A group of scientists believe that they have discovered why hair turns grey as one ages, which could help develop new treatments to alter cells and reverse or even halt the process.
The new study suggests that stem cells may ‘get stuck’ as hair ages and lose their ability to mature and maintain hair colour.
The research was led by New York University Grossman school of medicine investigator Qi Sun.
The researched focused on cells in the skin of mice and also found in humans melanocyte stem cells (or McSCs). Certain stem cells have a unique ability to transition between growth compartments in follicles.
These cells lose the ability to move with age and could result in greyness.
Hair colour is controlled by whether continually multiplying pools of McSCs within hair follicles get the signal to become mature cells. These make the protein pigments responsible for colour.
It was discovered that during normal hair growth the cells continually pivot between compartments of said developing hair follicle. It is inside these compartments where where McSCs are exposed to signals which influence the maturity.
The finding suggests that while hair ages, sheds and grows back, McSCs get stuck in the hair follicle bulge, causing the greyness.
#MaltaDaily