Molecular Mechanisms of Hyperpigmentation
Abnormal pigmentation may develop at a number of points in the biochemical cascades that regulate healthy pigmentation.Hyperpigmentation disorders may occur when melanocytes
produce too much melanin, or when epidermal cells retain too much melanin if cell turnover is abnormal. Theoretically, any substance that inhibits the catalytic function of tyrosinase could be used to cosmetically brighten the skin. However, the clinician must balance the patient’s desire for lighter skin with the need to protect the skin from ultraviolet radiation. Ideally, the brightening agent should slow melanin synthesis, but not stop it entirely.
Depigmenting agents can have potent effects by acting on one or more steps in the melanogenic pathway (starting with inflammation), melanosome transfer, or post-transfer pigment
processing and degradation.
Molecular Mechanisms of HyperpigmentationAbnormal pigmentation may develop at a number of points in the biochemical cascades that regulate healthy pigmentation.Hyperpigmentation disorders may occur when melanocytesproduce too much melanin, or when epidermal cells retain too much melanin if cell turnover is abnormal. Theoretically, any substance that inhibits the catalytic function of tyrosinase could be used to cosmetically brighten the skin. However, the clinician must balance the patient’s desire for lighter skin with the need to protect the skin from ultraviolet radiation. Ideally, the brightening agent should slow melanin synthesis, but not stop it entirely.Depigmenting agents can have potent effects by acting on one or more steps in the melanogenic pathway (starting with inflammation), melanosome transfer, or post-transfer pigmentprocessing and degradation.
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