标题：Carbachol-Induced Membrane Ruffling and Its Desensitization in Rat Basophilic Leukemia (RBL-2H3) Cells Transfected with m3 Muscarinic Acetylcholine Receptors
摘要：The changes in the reorganization of actin filaments during desensitization of secretion were investigated by transfecting RBL-2H3 cells with cDNA encoding the human m3 muscarinic acetylcholine receptors (RBL-m3 cells). Incubation of RBL-m3 cells with 10—100 μ M carbachol in Ca2+-free medium developed membrane ruffling. When the cells were desensitized under the condition where desensitization of carbachol-induced secretion occurred, desensitized cells failed to develop membrane ruffling with the subsequent addition of carbachol. These results suggest that m3 muscarinic receptor-mediated desensitization of secretion involves negative regulation of actin reorganization leading to membrane ruffling.
