UV damage to the skinradiation lasts a very long time, even after shelter from the sun in the shade. Researchers say that ultraviolet radiation after sunbathing, including in a solarium, can lead to DNA damage in special cells, melanocytes, which produce the substance melanin, which gives the skin color. Damage to melanocytes is the main cause of skin cancer, scientists say.
It was previously believed that melanin protects the skin by blocking ultraviolet light. However, a new study showed that melanin has both protective and harmful effects.
Researchers Affected Mouse Melanocytesand human ultraviolet radiation. In melanocytes with melanin, DNA damage occurred immediately and lasted for several hours after the cessation of irradiation. Melanocytes not containing melanin received damage only during exposure to ultraviolet light.
If you look inside the skin of an adult, thenYou can see that melanin protects it from damage. He works like a shield. However, he does both good and bad things, ”says study author, professor of therapeutic radiology and dermatology Douglas Brush from Yale University School of Medicine.
Scientists have explained the process that leads toDNA damage, even after sunbathing. It turns out that ultraviolet radiation activates enzymes that stimulate the production of melanin. In the process, the same damage is created in the dark as during sun exposure.
The process is very slow, so scientistslooking for ways to prevent it. One of these ways they see the use of night cream after tanning, which can block the transmission of the negative effect to skin cells.
The study was published in the journal Science.
Earlier it was found that sunscreen kills sea inhabitants.