Parathyroid hormone receptors in control of proximal tubule function.

Parathyroid hormone receptors in control of proximal tubule function.
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甲状旁腺激素受体控制近曲小管功能。

DOI:
10.1146/annurev.ph.54.030192.000435
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发表时间:
1992
影响因子:
18.2
通讯作者:
H. Murer
H. Murer
中科院分区:
医学1区
文献类型:
--
作者:
R. Muff;J. Fischer;J. Biber;H. Murer

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甲状旁腺激素对肾近端小管功能的作用涉及磷脂酶C/蛋白激酶C以及腺苷酸环化酶/蛋白激酶A介导的调节途径。组织培养实验表明,低浓度的PTH优先影响磷脂酶C/蛋白激酶C途径。在体内,这两个调节级联可能参与近端小管功能的调节。目前尚不清楚这两种细胞内途径是否与一种或两种PTH受体相关。在近曲小管上皮细胞中,可能存在涉及不同第二信使的PTH受体的极化分布。在体内循环PTH浓度范围内的高亲和力(Kd 10(-11)-10(-12)M)PTH受体仍有待鉴定。PTH受体以及PTH敏感的细胞内介质和转运系统的结构和功能表征形成了更好地理解PTH依赖性调节近端小管功能的基础。
Parathyroid hormone action on renal proximal tubule function involves phospholipase C/protein kinase C as well as adenylate cyclase/protein kinase A mediated regulatory pathways. Tissue culture experiments suggest that low concentrations of PTH affect preferentially the phospholipase C/protein kinase C pathway. In vivo, both regulatory cascades are probably involved in the regulation of proximal tubule function. It is not clear at present whether the two intracellular pathways are linked to one or two PTH receptors. A polarized distribution of PTH receptor(s) involving different second messengers appears possible in proximal tubule epithelial cells. High-affinity (Kd 10(-11)-10(-12) M) PTH receptors in the range of circulating PTH concentrations in vivo remain to be identified. Structural and functional characterization of PTH receptors as well as of the PTH-sensitive intracellular mediators and transport systems form the basis for a better understanding of PTH-dependent regulation of proximal tubule function.
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