Abstract
The distribution and dynamics of LFA-1 molecules over the surface of human lymphocytes were analysed using immunogold label-fracture and fracture-flip methods. Patching and capping were induced by incubation at 37°C with antibodies directed against the alpha and beta chains respectively of the heterodimeric LFA-1 molecule, and were followed by immunofluorescence. Treatment with 12-O-tetradecanoylphorbol-13-acetate (TPA) to link LFA-1 molecules to the cytoskeleton increased the percentage of capped cells, implying a faster and more efficient process of capping. At all times of clustering or upon phorbol ester treatment, the concentration of LFA-1 in patches and then in caps was not accompained by a parallel concentration of membrane particles on the freeze-fractured plasma membranes. Our results support the role of the cytoskeleton in regulating the capping phenomenon and in controlling the structural organization of the plasma membranes.
Original language | English |
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Pages (from-to) | 253-258 |
Number of pages | 6 |
Journal | Histochemistry |
Volume | 98 |
Issue number | 4 |
DOIs | |
Publication status | Published - Nov 1992 |
ASJC Scopus subject areas
- Anatomy