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He Q, Yuan Q, Shan H, Wu C, Gu Y, Wu K, Hu W, Zhang Y, He X, Xu HE, Zhao LH. Mechanisms of ligand recognition and activation of melanin-concentrating hormone receptors. Cell Discov 2024; 10:48. [PMID: 38710677 DOI: 10.1038/s41421-024-00679-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 04/10/2024] [Indexed: 05/08/2024] Open
Abstract
Melanin-concentrating hormone (MCH) is a cyclic neuropeptide that regulates food intake, energy balance, and other physiological functions by stimulating MCHR1 and MCHR2 receptors, both of which are class A G protein-coupled receptors. MCHR1 predominately couples to inhibitory G protein, Gi/o, and MCHR2 can only couple to Gq/11. Here we present cryo-electron microscopy structures of MCH-activated MCHR1 with Gi and MCH-activated MCHR2 with Gq at the global resolutions of 3.01 Å and 2.40 Å, respectively. These structures reveal that MCH adopts a consistent cysteine-mediated hairpin loop configuration when bound to both receptors. A central arginine from the LGRVY core motif between the two cysteines of MCH penetrates deeply into the transmembrane pocket, triggering receptor activation. Integrated with mutational and functional insights, our findings elucidate the molecular underpinnings of ligand recognition and MCH receptor activation and offer a structural foundation for targeted drug design.
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Affiliation(s)
- Qian He
- State Key Laboratory of Drug Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Qingning Yuan
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Hong Shan
- State Key Laboratory of Drug Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Canrong Wu
- State Key Laboratory of Drug Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Yimin Gu
- State Key Laboratory of Drug Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Kai Wu
- State Key Laboratory of Drug Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Wen Hu
- State Key Laboratory of Drug Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Yumu Zhang
- State Key Laboratory of Drug Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Xinheng He
- State Key Laboratory of Drug Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - H Eric Xu
- State Key Laboratory of Drug Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
- University of Chinese Academy of Sciences, Beijing, China.
| | - Li-Hua Zhao
- State Key Laboratory of Drug Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
- University of Chinese Academy of Sciences, Beijing, China.
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He X, Li Y, Zhang N, Huang J, Ming X, Guo R, Hu Y, Ji P, Guo F. Melanin-concentrating hormone promotes anxiety and intestinal dysfunction via basolateral amygdala in mice. Front Pharmacol 2022; 13:906057. [PMID: 36016574 PMCID: PMC9395614 DOI: 10.3389/fphar.2022.906057] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 07/08/2022] [Indexed: 11/13/2022] Open
Abstract
The limbic system plays a pivotal role in stress-induced anxiety and intestinal disorders, but how the functional circuits between nuclei within the limbic system are engaged in the processing is still unclear. In our study, the results of fluorescence gold retrograde tracing and fluorescence immunohistochemistry showed that the melanin-concentrating hormone (MCH) neurons of the lateral hypothalamic area (LHA) projected to the basolateral amygdala (BLA). Both chemogenetic activation of MCH neurons and microinjection of MCH into the BLA induced anxiety disorder in mice, which were reversed by intra-BLA microinjection of MCH receptor 1 (MCHR1) blocker SNAP-94847. In the chronic acute combining stress (CACS) stimulated mice, SNAP94847 administrated in the BLA ameliorated anxiety-like behaviors and improved intestinal dysfunction via reducing intestinal permeability and inflammation. In conclusion, MCHergic circuit from the LHA to the BLA participates in the regulation of anxiety-like behavior in mice, and this neural pathway is related to the intestinal dysfunction in CACS mice by regulating intestinal permeability and inflammation.
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Affiliation(s)
- Xiaoman He
- Pathophysiology Department, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Yuhang Li
- Pathophysiology Department, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Nana Zhang
- Department of Clinical Laboratory, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jinfang Huang
- Pathophysiology Department, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Xing Ming
- Pathophysiology Department, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Ruixiao Guo
- Pathophysiology Department, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Yang Hu
- Qingdao Medical College, Qingdao University, Qingdao, China
| | - Pengfei Ji
- Qingdao Medical College, Qingdao University, Qingdao, China
| | - Feifei Guo
- Pathophysiology Department, School of Basic Medicine, Qingdao University, Qingdao, China
- *Correspondence: Feifei Guo,
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Diniz GB, Battagello DS, Klein MO, Bono BSM, Ferreira JGP, Motta‐Teixeira LC, Duarte JCG, Presse F, Nahon J, Adamantidis A, Chee MJ, Sita LV, Bittencourt JC. Ciliary melanin‐concentrating hormone receptor 1 (MCHR1) is widely distributed in the murine CNS in a sex‐independent manner. J Neurosci Res 2020; 98:2045-2071. [DOI: 10.1002/jnr.24651] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 03/24/2020] [Accepted: 05/07/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Giovanne B. Diniz
- Department of Anatomy Institute of Biomedical Sciences University of Sao Paulo Sao Paulo Brazil
- Department of Neurosurgery Yale School of Medicine New Haven CT USA
| | - Daniella S. Battagello
- Department of Anatomy Institute of Biomedical Sciences University of Sao Paulo Sao Paulo Brazil
| | - Marianne O. Klein
- Department of Anatomy Institute of Biomedical Sciences University of Sao Paulo Sao Paulo Brazil
| | | | - Jozélia G. P. Ferreira
- Department of Anatomy Institute of Biomedical Sciences University of Sao Paulo Sao Paulo Brazil
| | - Livia C. Motta‐Teixeira
- Department of Anatomy Institute of Biomedical Sciences University of Sao Paulo Sao Paulo Brazil
| | - Jessica C. G. Duarte
- Department of Anatomy Institute of Biomedical Sciences University of Sao Paulo Sao Paulo Brazil
| | - Françoise Presse
- Institut de Pharmacologie Moléculaire et Cellulaire (IPMC) Université Côte d’AzurCNRS Valbonne France
| | - Jean‐Louis Nahon
- Institut de Pharmacologie Moléculaire et Cellulaire (IPMC) Université Côte d’AzurCNRS Valbonne France
| | | | - Melissa J. Chee
- Department of Neuroscience Carleton University Ottawa ON Canada
| | - Luciane V. Sita
- Department of Anatomy Institute of Biomedical Sciences University of Sao Paulo Sao Paulo Brazil
| | - Jackson C. Bittencourt
- Department of Anatomy Institute of Biomedical Sciences University of Sao Paulo Sao Paulo Brazil
- Center for Neuroscience and Behavior Institute of Psychology University of Sao Paulo Sao Paulo Brazil
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Diniz GB, Battagello DS, Cherubini PM, Reyes-Mendoza JD, Luna-Illades C, Klein MO, Motta-Teixeira LC, Sita LV, Miranda-Anaya M, Morales T, Bittencourt JC. Melanin-concentrating hormone peptidergic system: Comparative morphology between muroid species. J Comp Neurol 2019; 527:2973-3001. [PMID: 31152440 DOI: 10.1002/cne.24723] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 05/23/2019] [Accepted: 05/24/2019] [Indexed: 12/15/2022]
Abstract
Melanin-concentrating hormone (MCH) is a conserved neuropeptide, predominantly located in the diencephalon of vertebrates, and associated with a wide range of functions. While functional studies have focused on the use of the traditional mouse laboratory model, critical gaps exist in our understanding of the morphology of the MCH system in this species. Even less is known about the nontraditional animal model Neotomodon alstoni (Mexican volcano mouse). A comparative morphological study among these rodents may, therefore, contribute to a better understanding of the evolution of the MCH peptidergic system. To this end, we employed diverse immunohistochemical protocols to identify key aspects of the MCH system, including its spatial relationship to another neurochemical population of the tuberal hypothalamus, the orexins. Three-dimensional (3D) reconstructions were also employed to convey a better sense of spatial distribution to these neurons. Our results show that the distribution of MCH neurons in all rodents studied follows a basic plan, but individual characteristics are found for each species, such as the preeminence of a periventricular group only in the rat, the lack of posterior groups in the mouse, and the extensive presence of MCH neurons in the anterior hypothalamic area of Neotomodon. Taken together, these data suggest a strong anatomical substrate for previously described functions of the MCH system, and that particular neurochemical and morphological features may have been determinant to species-specific phenotypes in rodent evolution.
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Affiliation(s)
- Giovanne B Diniz
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Daniella S Battagello
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.,Departamento de Neurobiología Celular y Molecular, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Santiago de Querétaro, Queretaro, Mexico
| | - Pedro M Cherubini
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Julio D Reyes-Mendoza
- Departamento de Neurobiología Celular y Molecular, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Santiago de Querétaro, Queretaro, Mexico
| | - Cesar Luna-Illades
- Departamento de Neurobiología Celular y Molecular, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Santiago de Querétaro, Queretaro, Mexico
| | - Marianne O Klein
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Lívia C Motta-Teixeira
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.,Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Luciane V Sita
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Manuel Miranda-Anaya
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias, Universidad Nacional Autónoma de México, Santiago de Querétaro, Queretaro, Mexico
| | - Teresa Morales
- Departamento de Neurobiología Celular y Molecular, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Santiago de Querétaro, Queretaro, Mexico
| | - Jackson C Bittencourt
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.,Center for Neuroscience and Behavior, Institute of Psychology, University of São Paulo, São Paulo, Brazil
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