Abstract
The epidermal metabolic activity of a patient with a marked generalized ichthyosis associated with heredopathia atactica polyneuritiformis has been investigated. Both the in vivo labeling index and the in vitro rates of incorporation of radioactively labeled thymidine, proline, histidine and acetate were increased relative to normal indicating a high rate of epidermopoiesis. Thin-layer chromatographic analysis of 14C-acetate containing lipid extracts revealed qualitative changes compared with normal. In particular, altered proportions of radioactivities were incorporated into the triglyceride and phospholipid moieties. However, as abnormal patterns of lipogenesis are also seen in autosomal dominant ichthyosis, these changes are probably a reflection of disordered keratinization.
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