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Deng X, Yang H, He X, Liao Y, Zheng C, Zhou Q, Zhu C, Zhang G, Gao J, Zhou N. Activation of Bombyx neuropeptide G protein-coupled receptor A4 via a Gαi-dependent signaling pathway by direct interaction with neuropeptide F from silkworm, Bombyx mori. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2014; 45:77-88. [PMID: 24374022 DOI: 10.1016/j.ibmb.2013.12.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Revised: 12/10/2013] [Accepted: 12/18/2013] [Indexed: 06/03/2023]
Abstract
Members of the mammalian neuropeptide Y (NPY) family serve as neurotransmitters and contribute to a diversity of physiological functions. Although neuropeptide F (NPF), the NPY-like orthologs from insects, have been identified, the NPF receptors and their signaling and physiological functions remain largely unknown. In this study, we established the stable and transient functional expression of a Bombyx orphan G protein-coupled receptor, BNGR-A4, in both mammalian HEK293 and insect SF21 cells. We identified Bombyx mori NPFs as specific endogenous ligands for the Bombyx Neuropeptide GPCR A4 (BNGR-A4) and, accordingly, named the receptor BomNPFR. Our results demonstrated that BomNPFR was activated by synthetic BomNPF1a and BomNPF1b at a high efficacy and by BomNPF2 at a low efficacy. This activation led to a decrease of forskolin or adipokinetic hormone peptide-stimulated adenylyl cyclase activity, an increase of intracellular Ca(2+), the activation of ERK1/2 signaling and receptor internalization. Moreover, a Rhodamine-labeled BomNPF1a peptide was found to bind specifically to BomNPFR. The results derived from quantitative RT-PCR analysis and dsRNA-mediated knockdown experiments demonstrated the possible role of BomNPFR in the regulation of food intake and growth. Our results provide the first in-depth information on BomNPFR-mediated signaling for the further elucidation of the BomNPF/BomNPFR system in the regulation of fundamental physiological processes.
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Affiliation(s)
- Xiaoyan Deng
- Institute of Biochemistry, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Huipeng Yang
- Institute of Biochemistry, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xiaobai He
- Institute of Biochemistry, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Yuan Liao
- Institute of Biochemistry, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Congxia Zheng
- Institute of Biochemistry, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Qi Zhou
- Zhejiang Provincial Key Laboratory for Model Organisms, School of Life Sciences, Wenzhou Medical College, Wenzhou, Zhejiang 325035, China
| | - Chenggang Zhu
- Institute of Biochemistry, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Guozheng Zhang
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, Jiangsu 410127, China
| | - Jimin Gao
- Zhejiang Provincial Key Laboratory for Model Organisms, School of Life Sciences, Wenzhou Medical College, Wenzhou, Zhejiang 325035, China
| | - Naiming Zhou
- Institute of Biochemistry, College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China.
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Allera-Moreau C, Chomarat P, Audinot V, Cogé F, Gillard M, Martineau Y, Boutin JA, Prats AC. The use of IRES-based bicistronic vectors allows the stable expression of recombinant G-protein coupled receptors such as NPY5 and histamine 4. Biochimie 2006; 88:737-46. [PMID: 16808994 DOI: 10.1016/j.biochi.2006.05.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2006] [Accepted: 05/19/2006] [Indexed: 10/24/2022]
Abstract
Stable expression of G protein coupled receptors in cell lines is a crucial tool for the characterization of the molecular pharmacology of receptors and the screening for new antagonists. However, in some instances, many difficulties have been encountered to obtain stable cell lines expressing functional receptors. Here, we addressed the question of vector optimization to establish cell lines expressing the human neuropeptide Y receptor 5 (NPY5-R) or histamine receptor 4 (HH4R). We have compared bicistronic vectors containing viral or cellular internal ribosome entry sites (IRES), co-expressing the receptor and the neomycine resistance gene from a single mRNA, to a bigenic vector containing two distinct promoters upstream each different genes. This study is the first one to validate the use of three cellular IRESs for long-term transgene expression. Our results demonstrate for both NPY5-R and HH4R that the bicistronic vectors with EMCV, VEGF, FGF1A or FGF2 IRES provide clones expressing functional receptors with yields between 25% and 100%. In contrast, the bigenic vector provided no functional clones, related to a low expression of NPY5R mRNA. The cell lines expressing active receptor were stable after more than 50 passages. These data indicate that IRES-based bicistronic vectors are particularly appropriate to establish cell clones expressing active G-coupled protein receptors with a high yield. In the case of NPY5, it was a new way to produce such a stable cell line. Furthermore, the characteristics-presented herein-of this receptor pharmacological property are perfectly in line with those reported in the literature.
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Affiliation(s)
- C Allera-Moreau
- Institut National de la Santé et de la Recherche Médicale, INSERM, U589, Hormones, Facteurs de Croissance et Physiopathologie Vasculaire, Institut Louis-Bugnard, IFR31, Bâtiment L3, Avenue Jean-Poulhès, BP 84225, 31432 Toulouse cedex 04, France
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