c-Ha-ras原癌基因与银屑病  

c Ha ras Proto oncogene and Psoriasis

作　　者：曹文庆[1] 王椿森[1] 张德美[1] 

机构地区：[1]同济医科大学附属协和医院皮肤科,武汉430022

出　　处：《中华皮肤科杂志》1996年第2期85-87,共3页Chinese Journal of Dermatology

摘　　要：ｒａｓ癌基因与角朊细胞增殖、分化密切相关。本研究旨在利用斑点杂交和原位杂交法研究ｃ－Ｈａ－ｒａｓ癌基因在正常皮肤及进行期斑块型银屑病皮损中的表达，从癌基因角度初步探讨银屑病的发病机理。结果：①斑点杂交表明ｃ－Ｈａ－ｒａｓｍＲＮＡ在进行期斑块型银屑病皮损中含量较正常皮肤增加１倍；②ｃ－Ｈａ－ｒａｓ癌基因在正常皮肤表皮主要表达于部分基底层细胞，而在进行期银屑病皮损内则可见于除角质层外其余各层表皮细胞，且以棘层细胞为主。ｃ－Ｈａ－ｒａｓ癌基因在表皮细胞的过度表达及表达部位的改变可能是银屑病表皮过度增生和异常分化的重要机理。The ras oncogene product ras p21, which is structurally homologous to G protein, participates in the regulation of cellular proliferation and differentiation. The histopathology of psoriasis is characterized by hyperkeratosis and parakeratosis. The purpose of this study was to investigate, by dot blot and Dig DNA labeling in situ hybridization techniques, the expression of c Ha ras proto oncogene in normal skin and active plaque psoriatic lesions. The results showed: (1) dot blot revealed one fold elevation of c Ha ras gene transcript levels in psoriatic lesions compared with normal controls. (2) In normal epidermis, only a few basal cells expressed ras gene, however, the ras gene was expressed throughout all layers of epidermis of active psoriatic lesions except horny layer and predominantly in prickle cells. Our results suggest that overexpression of c Ha ras oncogene and changes of expression pattern might be central to the pathogenesis of psoriatic epidermal hyperplasia and abnormal pattern of cellular differentiation.

关 键 词：癌基因 银屑病 病理 

分 类 号：R758.630.2[医药卫生—皮肤病学与性病学]