Abstract

The cell cycle duration of basal cells in the epidermis of keratotic dermatoses was investigated with cytofluorometric method. In normal epidermis, the relative time spent in each phase was 85.1% (G1), 13.1% (S) and 1.8% (G2 + M). The relative time in ichthyosis vulgaris epidermis was similar to that in normal epidermis. In the case of psoriasis and non-bullous congenital ichthyosiform erythroderma, the relative number of S phase cells was more than that in normal epidermis. In psoriatic epidermis, nuclear protein value was highest not only in G1 fraction of basal cells but in differentiating cells.

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