首页> 外文OA文献 >Expression cloning of a common receptor for parathyroid hormone and parathyroid hormone-related peptide from rat osteoblast-like cells: a single receptor stimulates intracellular accumulation of both cAMP and inositol trisphosphates and increases intracellular free calcium.
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Expression cloning of a common receptor for parathyroid hormone and parathyroid hormone-related peptide from rat osteoblast-like cells: a single receptor stimulates intracellular accumulation of both cAMP and inositol trisphosphates and increases intracellular free calcium.

机译:从大鼠成骨细胞样细胞中克隆甲状旁腺激素和甲状旁腺激素相关肽的共同受体的表达克隆:单个受体刺激cAMP和肌醇三磷酸酯的细胞内蓄积并增加细胞内游离钙。

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摘要

Parathyroid hormone (PTH), a major regulator of mineral ion metabolism, and PTH-related peptide (PTHrP), which causes hypercalcemia in some cancer patients, stimulate multiple signals (cAMP, inositol phosphates, and calcium) probably by activating common receptors in bone and kidney. Using expression cloning, we have isolated a cDNA clone encoding rat bone PTH/PTHrP receptor from rat osteosarcoma (ROS 17/2.8) cells. The rat bone PTH/PTHrP receptor is 78% identical to the opossum kidney receptor; this identity indicates striking conservation of this receptor across distant mammalian species. Additionally, the rat bone PTH/PTHrP receptor has significant homology to the secretin and calcitonin receptors but not to any other G protein-linked receptor. When expressed in COS cells, a single cDNA clone, expressing either rat bone or opossum kidney PTH/PTHrP receptor, mediates PTH and PTHrP stimulation of both adenylate cyclase and phospholipase C. These properties could explain the diversity of PTH action without the need to postulate other receptor subtypes.
机译:甲状旁腺激素(PTH)是矿物质离子代谢的主要调节剂,PTH相关肽(PTHrP)可能在某些癌症患者中引起高钙血症,可能通过激活骨骼中的常见受体来刺激多种信号(cAMP,肌醇磷酸盐和钙)和肾脏。使用表达克隆,我们从大鼠骨肉瘤(ROS 17 / 2.8)细胞中分离了一个编码大鼠骨PTH / PTHrP受体的cDNA克隆。大鼠骨中的PTH / PTHrP受体与负鼠肾受体具有78%的同一性。这种身份表明该受体在遥远的哺乳动物物种中具有惊人的保守性。另外,大鼠骨中的PTH / PTHrP受体与促胰液素和降钙素受体具有显着同源性,但与任何其他G蛋白连接的受体均无显着同源性。当在COS细胞中表达时,表达大鼠骨骼或负鼠肾PTH / PTHrP受体的单个cDNA克隆介导腺苷酸环化酶和磷脂酶C的PTH和PTHrP刺激。这些特性可以解释PTH作用的多样性而无需假设其他受体亚型。

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