DERMAL PAPILLA (DP)
The dermal papillae (DP) (singular papilla) are small, root-like extensions from which hair is formed.
Dermal papillae play a pivotal role in hair formation, growth and cycling.
Dermal papilla (DP) cells are the cells inside these sheaths.
The cycle of hair regrowth is determined by the number of dermal papilla cells in the "root."
After a certain time, the DP cells stop getting nutrients from the blood, and their number reduce. This marks the shift from anagen to catagen phase. As more of these cells die, the phase ultimately shifts from catagen to telogen.
DP cell number
DP, Keratinocytes and Melanocytes
This diagram shows the interactions between the proteins with key roles on hair growth.
As you can see, all the cells influence one another to maintain an equilibrium. Once this equilibrium breaks, problems such as hair loss, hair thinning or white hair occur.
DP cells provide the cells in the dermis with oxygen and nutrients to keep them active.
As our hair is around 90% keratin, keeping a high number of DP cells allow a more optimal and rapid growth of hair, as well as healthier (sturdier) hair.
The pigmentation of our hair (melanin) is made by melanocytes around the DP. To keep your hair from losing its color, it is vital to keep these proteins alive, so they can continue to take their role of producing melanin.
Rejuvenate your hair by reviving your DP cells!
Simply put, anyone's hair can be revived by increasing the number of DP cells and/or maintaining the DP cells alive.