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Phospholipase C beta 2 in vascular smooth muscle.

机译:磷脂酶C在血管平滑肌β2。

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摘要

Receptor-mediated inositol 1,4,5-trisphosphate formation in most tissue is dependent on a variety of phospholipase C isoforms. To determine which phospholipase C isoforms were present in vascular smooth muscle compared to brain, liver, and spleen, we extracted proteins from these tissues and separated and identified the phospholipase C isoforms by immunoblotting. Aliquots of rat tail artery were examined by this procedure, together with aliquots of rat liver, spleen, cerebral cortex, hippocampus, cerebellum, aorta, and mesenteric artery. Phospholipase C gamma 1 was shown to be present in all of these tissues, while phospholipase C beta 1 was shown to be limited to fractions from brain. Phospholipase C delta 1 was detected in rat tail artery, mesenteric artery, aorta, and brain. Phospholipase C beta 2 was found in rat tail artery, liver, and brain. This is the first report of phospholipase C beta 2 in tissues other than HL60 cells. Since G proteins activate IP3 production via stimulation of phospholipase C beta isoforms in many tissues, and agonist-stimulated IP3 production in smooth muscle requires G protein activation, phospholipase C beta 2 may be required for agonist-stimulated force production in vascular smooth muscle.
机译:受体介导肌醇1,4,5-trisphosphate在大多数组织依赖于形成各种各样的磷脂酶C亚型。的磷脂酶C亚型在场血管平滑肌的大脑相比,肝、从这些和脾脏,我们提取蛋白质组织和分离和确定了磷脂酶C亚型的免疫印迹。整除的鼠尾动脉检查程序,连同整除的鼠肝、脾脏,大脑皮层、海马、小脑主动脉和肠系膜动脉。γ1显示在所有这些组织,而磷脂酶C beta 1所示从大脑仅限于分数。磷脂酶Cδ1中检测出老鼠的尾巴动脉,肠系膜动脉、主动脉和大脑。磷脂酶C beta 2被发现在老鼠尾巴动脉、肝和大脑。报告的磷脂酶Cβ2在其他组织比HL60细胞。通过刺激磷脂酶C生产β亚型在许多组织中,agonist-stimulated IP3生产顺利肌肉需要G蛋白的激活,磷脂酶C beta 2可能需要在血管agonist-stimulated力生产平滑肌。

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