Melanocytes are melanin-producing cells located in the bottom layer (the stratum basale) of the skin's epidermis, the middle layer of the eye. Melanin is the pigment primarily responsible for skin color.
Damage to melanocytes causes skin cancer.
Initially it was considered that Melanin have protective but after study only it is evdently proved that it has bothprotective and harmful effect.
Researchers exposed mouse melanocytes and human melanocytes to UV radiation.This gives a shocker result...
In melanocytes with melanin, DNA damage occurred not only immediately, but also hours after UV exposure ended. In melanocytes that didn't have melanin, the damage occurred only during UV exposure but not after the exposure.
UV light activated enzymes that stimulated melanin. This process, called chemiexcitation, created the same DNA damage in the dark that sunlight caused in daytime.
Chemiexcitation is a slow process and it may be possible to develop ways to prevent it, such as "an evening-after" sunscreen that might be able to block the transfer of damaging energy to the skin cells.
A report by BCF.
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