Non-canonical signaling of the PTH receptor

被引:38
作者
Vilardaga, Jean-Pierre [1 ]
Gardella, Thomas J. [2 ,3 ]
Wehbi, Vanessa L. [1 ]
Feinstein, Timothy N. [1 ]
机构
[1] Univ Pittsburgh, Sch Med, Dept Pharmacol & Chem Biol, Lab GPCR Biol, Pittsburgh, PA 15261 USA
[2] Massachusetts Gen Hosp, Dept Med, Endocrine Unit, Boston, MA 02114 USA
[3] Harvard Univ, Sch Med, Boston, MA 02114 USA
基金
美国国家卫生研究院;
关键词
PARATHYROID-HORMONE RECEPTOR; BETA-ADRENERGIC-RECEPTOR; PROTEIN-KINASE-C; PTH/PTHRP RECEPTOR; LIGAND-BINDING; BETA(2)-ADRENERGIC RECEPTORS; BETA-2-ADRENERGIC RECEPTOR; POSTMENOPAUSAL WOMEN; COUPLED RECEPTORS; PEPTIDE LIGANDS;
D O I
10.1016/j.tips.2012.05.004
中图分类号
R9 [药学];
学科分类号
100702 [药剂学];
摘要
The classical model of arrestin-mediated desensitization of cell-surface G-protein-coupled receptors (GPCRs) is thought to be universal. However, this paradigm is incompatible with recent reports that the parathyroid hormone (PTH) receptor (PTHR), a crucial GPCR for bone and mineral ion metabolism, sustains G(s) activity and continues to generate cAMP for prolonged periods after ligand washout; during these periods the receptor is observed mainly in endosomes, associated with the bound ligand, Gs and beta-arrestins. In this review we discuss possible molecular mechanisms underlying sustained signaling by the PTHR, including modes of signal generation and attenuation within endosomes, as well as the biological relevance of such non-canonical signaling.
引用
收藏
页码:423 / 431
页数:9
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