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Pearce A, Redfern-Nichols T, Harris M, Poyner DR, Wigglesworth M, Ladds G. Determining the Effects of Differential Expression of GRKs and β-arrestins on CLR-RAMP Agonist Bias. Front Physiol 2022; 13:840763. [PMID: 35422711 PMCID: PMC9001978 DOI: 10.3389/fphys.2022.840763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 03/08/2022] [Indexed: 11/17/2022] Open
Abstract
Signalling of the calcitonin-like receptor (CLR) is multifaceted, due to its interaction with receptor activity modifying proteins (RAMPs), and three endogenous peptide agonists. Previous studies have focused on the bias of G protein signalling mediated by the receptor and receptor internalisation of the CLR-RAMP complex has been assumed to follow the same pattern as other Class B1 G Protein-Coupled Receptors (GPCRs). Here we sought to measure desensitisation of the three CLR-RAMP complexes in response to the three peptide agonists, through the measurement of β-arrestin recruitment and internalisation. We then delved further into the mechanism of desensitisation through modulation of β-arrestin activity and the expression of GPCR kinases (GRKs), a key component of homologous GPCR desensitisation. First, we have shown that CLR-RAMP1 is capable of potently recruiting β-arrestin1 and 2, subsequently undergoing rapid endocytosis, and that CLR-RAMP2 and -RAMP3 also utilise these pathways, although to a lesser extent. Following this we have shown that agonist-dependent internalisation of CLR is β-arrestin dependent, but not required for full agonism. Overexpression of GRK2-6 was then found to decrease receptor signalling, due to an agonist-independent reduction in surface expression of the CLR-RAMP complex. These results represent the first systematic analysis of the importance of β-arrestins and GRKs in CLR-RAMP signal transduction and pave the way for further investigation regarding other Class B1 GPCRs.
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Affiliation(s)
- Abigail Pearce
- Department of Pharmacology, University of Cambridge, Cambridge, United Kingdom
| | | | - Matthew Harris
- Department of Pharmacology, University of Cambridge, Cambridge, United Kingdom
| | - David R. Poyner
- School of Life and Health Sciences, Aston University, Birmingham, United Kingdom
| | - Mark Wigglesworth
- Hit Discovery, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, London, United Kingdom
| | - Graham Ladds
- Department of Pharmacology, University of Cambridge, Cambridge, United Kingdom
- *Correspondence: Graham Ladds,
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Guo F, Yang L, Luo J, Quan H, Wang Z, Peng H, Hong C, Li J, Jiang Z, Zhang L, Qin X. Involvement of CGRP-RCP in the caveolin-1/ERK1/2 signal pathway in the static pressure-induced proliferation of vascular smooth muscle cells. J Cell Physiol 2018; 233:6910-6920. [PMID: 29741760 DOI: 10.1002/jcp.26582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 03/08/2018] [Indexed: 11/09/2022]
Abstract
Previous study suggested that the receptor component protein (RCP), one of the components of calcitonin gene-related peptide (CGRP) receptor, plays a multiple role in the cellular signal transduction. The study was designed to investigate whether or not the RCP involved in the regulation of caveolin-1/extracellular signal-regulated kinases-1 and -2 (ERK1/2) signal pathway in the vascular smooth muscle cells (VSMCs) proliferation induced by static pressure. Mouse-derived VSMCs line A10 (A10 VSMCs) was served as project in this experiment. Results showed that the A10 VSMCs viability and proliferating cell nuclear antigen (PCNA) expression which were increased by static pressure were inhibited by pretreatment of CGRP. In like manner, the expressions of the decreased-caveolin-1 and the increased-phosphorylated ERK1/2 (p-ERK1/2) induced by static pressure were significantly reversed by pretreatment of CGRP, respectively. Meanwhile, the expression of RCP was up-regulated by the static pressure. Silence of RCP gene with the small interrupt RNA (siRNA) not only significantly increased A10 VSMC proliferation but also increased the expression of p-ERK1/2 in response to static pressure. When treatment of A10 VSMCs with 120-mmHg static pressure for different time, however, the protein band of caveolin-1 and RCP was the least at time point of 10 min, but the p-ERK1/2 expression was the most maximum. In conclusion, RCP maybe involved in the static pressure-induced A10 VSMCs proliferation by regulation of caveolin-1/ERK1/2 signal pathway.
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Affiliation(s)
- Feng Guo
- Institute of Pharmacy and Pharmacology, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang, China
| | - Li Yang
- Institute of Pharmacy and Pharmacology, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang, China
| | - Jingfei Luo
- Institute of Pharmacy and Pharmacology, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang, China
| | - Haiyan Quan
- Institute of Pharmacy and Pharmacology, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang, China
| | - Zhen Wang
- Institute of Pharmacy and Pharmacology, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang, China
| | - Hongyan Peng
- Institute of Pharmacy and Pharmacology, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang, China
| | - Chenliang Hong
- Institute of Pharmacy and Pharmacology, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang, China
| | - Jie Li
- Institute of Pharmacy and Pharmacology, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang, China
| | - Zhisheng Jiang
- Institute of Pharmacy and Pharmacology, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang, China
| | - Liang Zhang
- Palmer Laboratory of Cell and Molecular Biology, Palmer College of Chiropractic, Port Orange, Florida
| | - Xuping Qin
- Institute of Pharmacy and Pharmacology, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang, China
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Quillon A, Fromy B, Debret R. Endothelium microenvironment sensing leading to nitric oxide mediated vasodilation: A review of nervous and biomechanical signals. Nitric Oxide 2015; 45:20-6. [DOI: 10.1016/j.niox.2015.01.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 01/07/2015] [Accepted: 01/13/2015] [Indexed: 10/24/2022]
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