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The effect of capsaicin application on mast cells in normal human skin

  • Histamine and Clinical Studies
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Abstract

Peptides released from sensory nerves during an axon reflex are thought to cause mast cell degranulation, histamine (Hi) release and Hi-induced vasodilatation leading to the flare of the triple response. Capsaicin stimulates peptide release from sensory neurones and causes flarein vivo but does not cause Hi release from mast cellsin vitro. The effects of capsaicin on mast cell degranulation in human skinin vivo has been studied by histological examination of skin biopsies after topical capsaicin (1%) treatment of stratum corneum-denuded forearm in four volunteers. The results show a significant reduction in the visible numbers of mast cells and the appearance of degranulated mast cell ghosts in the skin six hours after capsaicin application. Since capsaicin itself does not release Hi from mast cells, these data suggest that capsaicin-induced release of peptides from neurones could cause mast cell degranulation.

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Bunker, C.B., Cerio, R., Bull, H.A. et al. The effect of capsaicin application on mast cells in normal human skin. Agents and Actions 33, 195–196 (1991). https://doi.org/10.1007/BF01993165

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