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Langerhans cell

A star-shaped skin cell responsible for immune defence, located in the epidermis. It is capable of migrating and can alert other immune cells if invading molecules or foreign bodies are detected, making it a sort of “sentry” for the immune system. Langerhans cells are able to “phagocytise” – or engulf and destroy – foreign particles such as viruses. They can also stimulate the production of some lymphocytes. But intense, repeated exposure to UV rays can impair their cutaneous immune function.

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Skin index