| 摘要 |
Topical compositions containing nicotinic acid or its precursors, derivatives or metabolites, are used to improve skin condition and to treat or prevent skin disorders, abnormal lipid peroxidation, reduced cell-cell communication, deficient intracellular DNA synthesis, DNA damage, deficient DNA repair, abnormal post-translational modification of connective tissue components and dandruff. Topical compositions comprising nicotinic acid or its precursors, derivatives or metabolites and optionally electrolytes, polyols, urea and osmolytes are used: (1) to treat or prevent dry skin, to enhance the barrier function of the skin, for treatment, care and prophylaxis of sensitive skin and/or for treatment and prophylaxis of symptoms of a negative change in the physiological homeostasis of normal skin; (2) to treat or prevent inflammatory skin conditions, atopic eczema, polymorphic photodermatitis, psoriasis, vitiligo and sensitive, itching or irritated skin; (3) to treat or prevent abnormal lipid peroxidation; (4) to treat or prevent abnormal ceramide, lipid and energy metabolism of the skin, abnormal transepidermal water loss, reduced skin hydration and moisture content and altered Natural Moisturizing Factor content; (5) to treat or prevent reduced cell-cell communication, deficient intracellular DNA synthesis, DNA damage, reduced endogenous DNA repair, activation of metalloproteinases and/or other proteases or inhibition of corresponding DNA repair mechanisms and abnormal post-translational modification of connective tissue components; (6) to treat or prevent abnormal skin hyaluronic acid and glucosaminoglycan content; and (7) to treat or prevent dandruff of the hair and scalp and skin aging.
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