PMID: 3140742Jan 1, 1988Paper

Enhanced expression of ras gene products in psoriatic epidermis

Archives of Dermatological Research
H KobayashiN Kuzumaki


The ras oncogene product ras p21 is structurally homologous to guanine nucleotide-binding proteins and plays an important role in transducing signals elicited by membrane receptors into intracellular metabolism. We examined psoriatic tissues for expression of ras p21 and compared them with normal skin, using the indirect immunofluorescence technique with the anti-ras p21 monoclonal antibody (MoAb), rp-35. In normal epidermis of five healthy individuals and uninvolved epidermis of three psoriatic patients, only the basal layer was positively stained by rp-35. The spinous layer was negative or faintly positive. In contrast, all psoriatic epidermis obtained from 13 psoriatic patients had strong reactivity with rp-35 throughout the epidermis. There were no differences in the staining pattern of hair follicles, sebaceous glands, eccrine glands, and eccrine ducts, which positively reacted with rp-35, between psoriatic and normal skin. The functions of ras p21 have not been clearly identified in mammalian cells; however recent reports reveal that cyclic AMP production is inhibited by the transfection of activated ras gene into normal cells. Enhanced expression of ras p21 in psoriatic epidermis may be indicative of some mechanism of de...Continue Reading


Jan 16, 1986·The New England Journal of Medicine·M V ViolaJ Schlom
Jan 1, 1985·Cell·T KataokaM Wigler
Oct 1, 1985·The Journal of Investigative Dermatology·H IizukaA Ohkawara
Jun 1, 1986·Proceedings of the National Academy of Sciences of the United States of America·W G TarpleyR R Gorman
May 1, 1987·Proceedings of the National Academy of Sciences of the United States of America·P G ChesaH L Niman
Mar 15, 1985·Biochemical and Biophysical Research Communications·M E DeBortoliY S Cho-Chung
May 1, 1985·The Journal of Experimental Medicine·M V ViolaJ Schlom
Dec 1, 1985·The Journal of Investigative Dermatology·G D WeinsteinP A Ross
Apr 1, 1980·The Journal of Dermatology·T AoyagiY Miura
Apr 1, 1981·The Journal of Dermatology·T AoyagiY Miura
Nov 11, 1982·Nature·C J TabinE H Chang
Nov 18, 1983·Science·H LandR A Weinberg
Nov 1, 1984·Proceedings of the National Academy of Sciences of the United States of America·D J Slamon, M J Cline

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