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RAMP2 influences glucagon receptor pharmacology via trafficking and signaling.
Abstract Endogenous satiety hormones provide an attractive target for obesity drugs. Glucagon causes weight loss by reducing food intake and increasing energy expenditure. To further understand the cellular mechanisms by which glucagon and related ligands activate the glucagon receptor (GCGR), we have investigated the interaction of the GCGR with RAMP2, a member of the family of Receptor Activity Modifying Proteins.We have used a combination of competition binding experiments, cell surface ELISA, functional assays assessing the Gαs and Gq pathways and β-arrestin recruitment, and siRNA knockdown to examine the ef...
Source: Endocrinology - June 6, 2017 Category: Endocrinology Authors: Cegla J, Jones BJ, Gardiner JV, Hodson DJ, Marjot T, McGlone ER, Tan TM, Bloom SR Tags: Endocrinology Source Type: research

Leptin promotes the osteoblastic differentiation of vascular smooth muscle cells from female mice by increasing RANKL expression.
Abstract Arterial calcification is a complex and active regulated process, which results from a process of osteoblastic differentiation of vascular smooth muscle cells (VSMCs). Leptin, the product of the ob gene, mainly regulates food intake and energy expenditure and recently has been considered correlated with the arterial calcification. However, the mechanisms of the effects of leptin on osteoblastic differentiation of VSMCs are unknown. We used calcifying vascular smooth muscle cells (CVSMCs) as a model to investigate the relationship between leptin and the osteoblastic differentiation of CVSMCs and the signal...
Source: Endocrinology - November 18, 2013 Category: Endocrinology Authors: Liu GY, Liang QH, Cui RR, Liu Y, Wu SS, Shan PF, Yuan LQ, Liao EY Tags: Endocrinology Source Type: research