Abstract
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.
Original language | English (US) |
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Pages (from-to) | 371-377 |
Number of pages | 7 |
Journal | FEBS Letters |
Volume | 231 |
Issue number | 2 |
DOIs | |
State | Published - Apr 25 1988 |
Keywords
- EGF receptor
- HLA antigen
- Lateral diffusion
- Phosphorylation
ASJC Scopus subject areas
- Biophysics
- Structural Biology
- Biochemistry
- Molecular Biology
- Genetics
- Cell Biology