Modulation of HLA antigens in response to the binding of epidermal growth factor by A431 cells

FEBS Letters

Hosoi, Kazuo¹  Edidin, Michael¹  Kittur, Dilip S.¹ 

[1] Department of Biology, The Johns Hopkins University, Charles and 34th Streets, Baltimore, MD 21218, USA

关键词: HLA antigen;    EGF receptor;    Phosphorylation;    Lateral diffusion;   

DOI  :  10.1016/0014-5793(88)80852-4

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

In a previous study [(1984) J. Cell Biol. 98, 725–731] we showed that the level of human MHC, HLA antigens on A431 carcinoma cells is reduced after these cells bind epidermal growth factor (EGF). Here we use flow cytometry to determine the effects of various doses and times of EGF treatment on HLA expression. We then show that the reduction in HLA expression is associated with a reduction in the level of phosphorylation of immunoprecipitable surface HLA antigens, although longer exposure of cells with EGF increased both surface HLA expression and their phosphorylation levels. Lateral diffusion of HLA antigens is lower in EGF-treated than in control cells. The lower diffusion coefficients measured may be causally related to the decreased phosphorylation of HLA antigens.

【 授权许可】

Unknown