Demolle D, Boeynaems J M
Institute of Interdisciplinary Research, School of Medicine, Université Libre de Bruxelles, Belgium.
Br J Pharmacol. 1989 Nov;98(3):717-20. doi: 10.1111/j.1476-5381.1989.tb14597.x.
Pretreatment of bovine aortic smooth muscle cells in culture with pertussis toxin (PT) or cholera toxin (CT) potentiated the synthesis of prostacyclin (PGI2) induced by 5-hydroxytryptamine (5-HT) and phorbol-12-myristate, 13-acetate (PMA). The production of PGI2 by explants from the bovine aortic media was also synergistically stimulated by 5-HT and CT, whereas PT was inactive. These data are consistent with the hypothesis that guanosine 5'-triphosphate binding proteins are directly involved in the control of phospholipases which release free arachidonic acid for prostaglandin synthesis.
用百日咳毒素(PT)或霍乱毒素(CT)对培养的牛主动脉平滑肌细胞进行预处理,可增强5-羟色胺(5-HT)和佛波醇-12-肉豆蔻酸酯13-乙酸酯(PMA)诱导的前列环素(PGI2)合成。5-HT和CT也协同刺激牛主动脉中膜外植体产生PGI2,而PT无此作用。这些数据与以下假设一致,即鸟苷5'-三磷酸结合蛋白直接参与磷脂酶的控制,磷脂酶释放游离花生四烯酸用于前列腺素合成。