首页> 外文期刊>Life sciences >EVIDENCE FOR SIGNALLING BY BIG ENDOTHELIN-1 VIA CONVERSION TO ENDOTHELIN-1 IN PULMONARY ARTERY SMOOTH MUSCLE CELLS
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EVIDENCE FOR SIGNALLING BY BIG ENDOTHELIN-1 VIA CONVERSION TO ENDOTHELIN-1 IN PULMONARY ARTERY SMOOTH MUSCLE CELLS

机译:肺动脉平滑肌细胞中大内皮素-1信号转为内皮素-1的证据

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In this study, signalling by big endothelin-1 (big ET-1) and a role for the phosphoramidon-sensitive endothelin converting enzyme in this signalling was investigated in smooth muscle cells cultured from bovine pulmonary artery. In whole cells, both ET-1 and big ET-1 stimulated inositol phosphate accumulation in a time- and concentration-dependent manner. The endothelin ET-A receptor antagonist (BQ 123, 1 mu M) significantly inhibited stimulation by ET-1 (10 nM) or big ET-1 (100 nM). When cells were pretreated with 100 mu M phosphoramidon, the stimulation by big ET-I, but not ET-1 was abolished. In separate experiments, when cells were incubated with exogenous big ET-1, a time-dependent phosphoramidon-sensitive conversion to ET-1 was detected by radioimmunoassay. These results are consistent with the presence of a phosphoramidon-sensitive endothelin converting enzyme on the surface of bovine pulmonary artery smooth muscle cells, which may play a role in regulating signalling by circulating big ET-1. [References: 23]
机译:在这项研究中,在从牛肺动脉培养的平滑肌细胞中研究了大内皮素1(大ET-1)的信号传导以及磷酰胺敏感的内皮素转化酶在该信号传导中的作用。在整个细胞中,ET-1和大ET-1均以时间和浓度依赖性方式刺激肌醇磷酸积累。内皮素ET-A受体拮抗剂(BQ 123,1μM)显着抑制ET-1(10 nM)或大ET-1(100 nM)的刺激。用100μM的磷酰胺预处理细胞后,大ET-1而不是ET-1的刺激被取消。在单独的实验中,当将细胞与外源大ET-1孵育时,通过放射免疫测定法检测到了对时间依赖性的磷酰胺敏感的向ET-1的转化。这些结果与牛肺动脉平滑肌细胞表面存在磷酰胺敏感的内皮素转化酶有关,该酶可能通过循环大ET-1来调节信号传导。 [参考:23]

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