title: Metabolic changes at the margin of the spreading psoriatic lesion.
abstract: Keratotome slices were cut across the margins of rapidly-spreading psoriatic plaques. Each slice was divided into eight sections and in each section we measured the percentage cells in S phase and the levels of glucose-6-phosphate dehydrogenase (both related to epidermal proliferation), acid phosphatase (associated with keratinization) and alkaline phosphatase (a marker for dermal capillaries). Disturbances in the epidermis extended only 2 to 4 mm into the 'uninvolved' skin, whereas the capillaries were metabolically abnormal for a distance of about 2 cm ahead of the advancing edge of the plaque. This implies that changes in the capillary may precede those in the epidermis during the spread of the psoriatic lesion.
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism; D000469:Alkaline Phosphatase / Q000378:metabolism; D002453:Cell Cycle; D004247:DNA / Q000378:metabolism; D005954:Glucosephosphate Dehydrogenase / Q000378:metabolism; D006801:Humans; D007700:Kinetics; D011565:Psoriasis / Q000201:enzymology / Q000378:metabolism*; D012867:Skin / Q000201:enzymology / Q000378:metabolism*
chemical_list: D004247:DNA; D005954:Glucosephosphate Dehydrogenase; D000469:Alkaline Phosphatase; D000135:Acid Phosphatase