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Wang KY, Gao MX, Qi HB, An WT, Lin JY, Ning SL, Yang F, Xiao P, Cheng J, Pan W, Cheng QX, Wang J, Fang L, Sun JP, Yu X. Differential contributions of G protein- or arrestin subtype-mediated signalling underlie urocortin 3-induced somatostatin secretion in pancreatic δ cells. Br J Pharmacol 2024; 181:2600-2621. [PMID: 38613153 DOI: 10.1111/bph.16351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 12/29/2023] [Accepted: 02/05/2024] [Indexed: 04/14/2024] Open
Abstract
BACKGROUND AND PURPOSE Pancreatic islets are modulated by cross-talk among different cell types and paracrine signalling plays important roles in maintaining glucose homeostasis. Urocortin 3 (UCN3) secreted by pancreatic β cells activates the CRF2 receptor (CRF2R) and downstream pathways mediated by different G protein or arrestin subtypes in δ cells to cause somatostatin (SST) secretion, and constitutes an important feedback circuit for glucose homeostasis. EXPERIMENTAL APPROACH Here, we used Arrb1-/-, Arrb2-/-, Gsfl/fl and Gqfl/fl knockout mice, the G11-shRNA-GFPfl/fl lentivirus, as well as functional assays and pharmacological characterization to study how the coupling of Gs, G11 and β-arrestin1 to CRF2R contributed to UCN3-induced SST secretion in pancreatic δ cells. KEY RESULTS Our study showed that CRF2R coupled to a panel of G protein and arrestin subtypes in response to UCN3 engagement. While RyR3 phosphorylation by PKA at the S156, S2706 and S4697 sites may underlie the Gs-mediated UCN3- CRF2R axis for SST secretion, the interaction of SYT1 with β-arrestin1 is also essential for efficient SST secretion downstream of CRF2R. The specific expression of the transcription factor Stat6 may contribute to G11 expression in pancreatic δ cells. Furthermore, we found that different UCN3 concentrations may have distinct effects on glucose homeostasis, and these effects may depend on different CRF2R downstream effectors. CONCLUSIONS AND IMPLICATIONS Collectively, our results provide a landscape view of signalling mediated by different G protein or arrestin subtypes downstream of paracrine UCN3- CRF2R signalling in pancreatic β-δ-cell circuits, which may facilitate the understanding of fine-tuned glucose homeostasis networks.
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Affiliation(s)
- Kai-Yu Wang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Ming-Xin Gao
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Hai-Bo Qi
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Wen-Tao An
- Advanced Medical Research Institute, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jing-Yu Lin
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Shang-Lei Ning
- Department of Hepatobiliary Surgery, General surgery, Qilu Hospital, Shandong University, Jinan, China
| | - Fan Yang
- Advanced Medical Research Institute, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Peng Xiao
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Jie Cheng
- Advanced Medical Research Institute, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Wei Pan
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Qiu-Xia Cheng
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Jin Wang
- Department of Pharmacology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Le Fang
- Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Jin-Peng Sun
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Shandong University, Jinan, China
- Advanced Medical Research Institute, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xiao Yu
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
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Jin C, Chen H, Xie L, Zhou Y, Liu LL, Wu J. GPCRs involved in metabolic diseases: pharmacotherapeutic development updates. Acta Pharmacol Sin 2024; 45:1321-1336. [PMID: 38326623 PMCID: PMC11192902 DOI: 10.1038/s41401-023-01215-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 12/11/2023] [Indexed: 02/09/2024] Open
Abstract
G protein-coupled receptors (GPCRs) are expressed in a variety of cell types and tissues, and activation of GPCRs is involved in enormous metabolic pathways, including nutrient synthesis, transportation, storage or insulin sensitivity, etc. This review intends to summarize the regulation of metabolic homeostasis and mechanisms by a series of GPCRs, such as GPR91, GPR55, GPR119, GPR109a, GPR142, GPR40, GPR41, GPR43 and GPR120. With deep understanding of GPCR's structure and signaling pathways, it is attempting to uncover the role of GPCRs in major metabolic diseases, including metabolic syndrome, diabetes, dyslipidemia and nonalcoholic steatohepatitis, for which the global prevalence has risen during last two decades. An extensive list of agonists and antagonists with their chemical structures in a nature of small molecular compounds for above-mentioned GPCRs is provided as pharmacologic candidates, and their preliminary data of preclinical studies are discussed. Moreover, their beneficial effects in correcting abnormalities of metabolic syndrome, diabetes and dyslipidemia are summarized when clinical trials have been undertaken. Thus, accumulating data suggest that these agonists or antagonists might become as new pharmacotherapeutic candidates for the treatment of metabolic diseases.
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Affiliation(s)
- Cheng Jin
- Department of Medical Microbiology & Parasitology, MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University Shanghai Medical College, Shanghai, 200032, China
- College of Clinical Medicine, Fudan University Shanghai Medical College, Shanghai, 200032, China
| | - Hui Chen
- Department of Medical Microbiology & Parasitology, MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University Shanghai Medical College, Shanghai, 200032, China
| | - Li Xie
- Department of Medical Microbiology & Parasitology, MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University Shanghai Medical College, Shanghai, 200032, China
| | - Yuan Zhou
- Department of Medical Microbiology & Parasitology, MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University Shanghai Medical College, Shanghai, 200032, China
| | - Li-Li Liu
- Department of Gastroenterology & Hepatology, Zhongshan Hospital of Fudan University, Shanghai, 200032, China.
- Shanghai Institute of Liver Diseases, Fudan University Shanghai Medical College, Shanghai, 200032, China.
| | - Jian Wu
- Department of Medical Microbiology & Parasitology, MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University Shanghai Medical College, Shanghai, 200032, China.
- Department of Gastroenterology & Hepatology, Zhongshan Hospital of Fudan University, Shanghai, 200032, China.
- Shanghai Institute of Liver Diseases, Fudan University Shanghai Medical College, Shanghai, 200032, China.
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3
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Zhou T, Cheng J, He S, Zhang C, Gao MX, Zhang LJ, Sun JP, Zhu Y, Ai D. The sphingosine-1-phosphate receptor 1 mediates the atheroprotective effect of eicosapentaenoic acid. Nat Metab 2024:10.1038/s42255-024-01070-3. [PMID: 38907081 DOI: 10.1038/s42255-024-01070-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 05/23/2024] [Indexed: 06/23/2024]
Abstract
Omega-3 polyunsaturated fatty acids (ω-3 PUFAs) have been associated with potential cardiovascular benefits, partly attributed to their bioactive metabolites. However, the underlying mechanisms responsible for these advantages are not fully understood. We previously reported that metabolites of the cytochrome P450 pathway derived from eicosapentaenoic acid (EPA) mediated the atheroprotective effect of ω-3 PUFAs. Here, we show that 17,18-epoxyeicosatetraenoic acid (17,18-EEQ) and its receptor, sphingosine-1-phosphate receptor 1 (S1PR1), in endothelial cells (ECs) can inhibit oscillatory shear stress- or tumor necrosis factor-α-induced endothelial activation in cultured human ECs. Notably, the atheroprotective effect of 17,18-EEQ and purified EPA is circumvented in male mice with endothelial S1PR1 deficiency. Mechanistically, the anti-inflammatory effect of 17,18-EEQ relies on calcium release-mediated endothelial nitric oxide synthase (eNOS) activation, which is abolished upon inhibition of S1PR1 or Gq signaling. Furthermore, 17,18-EEQ allosterically regulates the conformation of S1PR1 through a polar interaction with Lys34Nter. Finally, we show that Vascepa, a prescription drug containing highly purified and stable EPA ethyl ester, exerts its cardiovascular protective effect through the 17,18-EEQ-S1PR1 pathway in male and female mice. Collectively, our findings indicate that the anti-inflammatory effect of 17,18-EEQ involves the activation of the S1PR1-Gq-Ca2+-eNOS axis in ECs, offering a potential therapeutic target against atherosclerosis.
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Affiliation(s)
- Ting Zhou
- State Key Laboratory of Experimental Hematology, Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, China
| | - Jie Cheng
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and New Cornerstone Science Laboratory, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- Advanced Medical Research Institute, Meili Lake Translational Research Park, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Shuo He
- State Key Laboratory of Experimental Hematology, Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, China
| | - Chao Zhang
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and New Cornerstone Science Laboratory, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- Advanced Medical Research Institute, Meili Lake Translational Research Park, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Ming-Xin Gao
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and New Cornerstone Science Laboratory, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- Advanced Medical Research Institute, Meili Lake Translational Research Park, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Li-Jun Zhang
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and New Cornerstone Science Laboratory, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- Advanced Medical Research Institute, Meili Lake Translational Research Park, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Jin-Peng Sun
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and New Cornerstone Science Laboratory, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.
- Advanced Medical Research Institute, Meili Lake Translational Research Park, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China.
| | - Yi Zhu
- State Key Laboratory of Experimental Hematology, Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, China.
| | - Ding Ai
- State Key Laboratory of Experimental Hematology, Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, China.
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4
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Yang Z, Wang JY, Yang F, Zhu KK, Wang GP, Guan Y, Ning SL, Lu Y, Li Y, Zhang C, Zheng Y, Zhou SH, Wang XW, Wang MW, Xiao P, Yi F, Zhang C, Zhang PJ, Xu F, Liu BH, Zhang H, Yu X, Gao N, Sun JP. Structure of GPR101-Gs enables identification of ligands with rejuvenating potential. Nat Chem Biol 2024; 20:484-492. [PMID: 37945893 DOI: 10.1038/s41589-023-01456-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 09/21/2023] [Indexed: 11/12/2023]
Abstract
GPR101 is an orphan G protein-coupled receptor actively participating in energy homeostasis. Here we report the cryo-electron microscopy structure of GPR101 constitutively coupled to Gs heterotrimer, which reveals unique features of GPR101, including the interaction of extracellular loop 2 within the 7TM bundle, a hydrophobic chain packing-mediated activation mechanism and the structural basis of disease-related mutants. Importantly, a side pocket is identified in GPR101 that facilitates in silico screening to identify four small-molecule agonists, including AA-14. The structure of AA-14-GPR101-Gs provides direct evidence of the AA-14 binding at the side pocket. Functionally, AA-14 partially restores the functions of GH/IGF-1 axis and exhibits several rejuvenating effects in wild-type mice, which are abrogated in Gpr101-deficient mice. In summary, we provide a structural basis for the constitutive activity of GPR101. The structure-facilitated identification of GPR101 agonists and functional analysis suggest that targeting this orphan receptor has rejuvenating potential.
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Affiliation(s)
- Zhao Yang
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jun-Yan Wang
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
| | - Fan Yang
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
- Advanced Medical Research Institute, Meili Lake Translational Research Park, Cheeloo College of Medicine, Shandong University, Jinan, China
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Kong-Kai Zhu
- Advanced Medical Research Institute, Meili Lake Translational Research Park, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Guo-Peng Wang
- State Key Laboratory of Membrane Biology, Peking-Tsinghua Joint Center for Life Sciences, School of Life Sciences, Peking University, Beijing, China
| | - Ying Guan
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
- Advanced Medical Research Institute, Meili Lake Translational Research Park, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Shang-Lei Ning
- Department of General Surgery, Qilu Hospital of Shandong University, Jinan, China
| | - Yan Lu
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yu Li
- State Key Laboratory of Membrane Biology, Peking-Tsinghua Joint Center for Life Sciences, School of Life Sciences, Peking University, Beijing, China
| | - Chao Zhang
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yuan Zheng
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
- Key Laboratory of Molecular Cardiovascular Science, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Ministry of Education, Beijing, China
| | - Shu-Hua Zhou
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xin-Wen Wang
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Ming-Wei Wang
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Peng Xiao
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Fan Yi
- Key Laboratory of Infection and Immunity of Shandong Province, Department of Pharmacology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Cheng Zhang
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Peng-Ju Zhang
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Fei Xu
- iHuman Institute, ShanghaiTech University, Shanghai, China
| | - Bao-Hua Liu
- Shenzhen Key Laboratory for Systemic Aging and Intervention (SKL-SAI), School of Basic Medical Sciences, Shenzhen University, Shenzhen, China
| | - Hua Zhang
- School of Biological Science and Technology, University of Jinan, Jinan, China
| | - Xiao Yu
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.
| | - Ning Gao
- State Key Laboratory of Membrane Biology, Peking-Tsinghua Joint Center for Life Sciences, School of Life Sciences, Peking University, Beijing, China.
| | - Jin-Peng Sun
- NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China.
- Advanced Medical Research Institute, Meili Lake Translational Research Park, Cheeloo College of Medicine, Shandong University, Jinan, China.
- Key Laboratory of Molecular Cardiovascular Science, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Ministry of Education, Beijing, China.
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5
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Zhou Z, Zhang W, Zhao F, Sun Y, Wang N, Cheng J, Zhan P, Yang F, Sun JP, Liu X, Kang D. Structure-Based Design of Novel G-Protein-Coupled Receptor TAAR1 Agonists as Potential Antipsychotic Drug Candidates. J Med Chem 2024; 67:4234-4249. [PMID: 38416116 DOI: 10.1021/acs.jmedchem.4c00195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The existing available antipsychotics have failed to manage the cognitive impairment of schizophrenia and induced a number of seriously undesirable effects. Trace amine-associated receptor 1 (TAAR1) has emerged as an ideal target for the design of antischizophrenia drugs, with the ability to mediate multiple psychological functions by sensing endogenous amine-containing metabolites without the side effects of catalepsy. In this work, a series of novel TAAR1 agonists were designed based on the structural analysis of the TAAR1 activation pocket. Among them, 6e displayed a potent TAAR1-Gs/Gq dual-pathway activation property, being different from that of the clinical drug candidate SEP-363856 with only TAAR1-Gs pathway activation. In rodent models, 6e significantly alleviated MK-801-induced schizophrenia-like cognitive phenotypes without inducing catalepsy. Furthermore, 6e·HCl exhibited favorable pharmacokinetic (T1/2 = 2.31 h, F = 39%) and safety properties. All these demonstrated that 6e·HCl may be used as a novel drug candidate for schizophrenia treatment.
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Affiliation(s)
- Zhenzhen Zhou
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan, Shandong 250012, China
| | - Weifeng Zhang
- Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China
| | - Fabao Zhao
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan, Shandong 250012, China
| | - Yanying Sun
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan, Shandong 250012, China
| | - Na Wang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan, Shandong 250012, China
| | - Jie Cheng
- Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China
| | - Peng Zhan
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan, Shandong 250012, China
| | - Fan Yang
- Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China
| | - Jin-Peng Sun
- Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China
| | - Xinyong Liu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan, Shandong 250012, China
| | - Dongwei Kang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan, Shandong 250012, China
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6
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Wang W, Li J, Cui S, Li J, Ye X, Wang Z, Zhang T, Jiang X, Kong Y, Chen X, Chen YQ, Zhu S. Microglial Ffar4 deficiency promotes cognitive impairment in the context of metabolic syndrome. SCIENCE ADVANCES 2024; 10:eadj7813. [PMID: 38306420 PMCID: PMC10836723 DOI: 10.1126/sciadv.adj7813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 01/03/2024] [Indexed: 02/04/2024]
Abstract
Metabolic syndrome (MetS) is closely associated with an increased risk of dementia and cognitive impairment, and a complex interaction of genetic and environmental dietary factors may be implicated. Free fatty acid receptor 4 (Ffar4) may bridge the genetic and dietary aspects of MetS development. However, the role of Ffar4 in MetS-related cognitive dysfunction is unclear. In this study, we found that Ffar4 expression is down-regulated in MetS mice and MetS patients with cognitive impairment. Conventional and microglial conditional knockout of Ffar4 exacerbated high-fat diet (HFD)-induced cognitive dysfunction and anxiety, whereas microglial Ffar4 overexpression improved HFD-induced cognitive dysfunction and anxiety. Mechanistically, we found that microglial Ffar4 regulated microglial activation through type I interferon signaling. Microglial depletion and NF-κB inhibition partially reversed cognitive dysfunction and anxiety in microglia-specific Ffar4 knockout MetS mice. Together, these findings uncover a previously unappreciated role of Ffar4 in negatively regulating the NF-κB-IFN-β signaling and provide an attractive therapeutic target for delaying MetS-associated cognitive decline.
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Affiliation(s)
- Wei Wang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Jinyou Li
- Affiliated Hospital of Jiangnan University, Wuxi 214122, China
| | - Siyuan Cui
- Jiangnan University Medical Center, Wuxi 214002, China
| | - Jiayu Li
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Xianlong Ye
- Ganjiang Chinese Medicine Innovation Center, Nanchang 330000, China
| | - Zhe Wang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Tingting Zhang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Xuan Jiang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Yulin Kong
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Xin Chen
- Jiangnan University Medical Center, Wuxi 214002, China
| | - Yong Q. Chen
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Shenglong Zhu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
- Jiangnan University Medical Center, Wuxi 214002, China
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7
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Shang P, Rong N, Jiang JJ, Cheng J, Zhang MH, Kang D, Qi L, Guo L, Yang GM, Liu Q, Zhou Z, Li XB, Zhu KK, Meng QB, Han X, Yan W, Kong Y, Yang L, Wang X, Lei D, Feng X, Liu X, Yu X, Wang Y, Li Q, Shao ZH, Yang F, Sun JP. Structural and signaling mechanisms of TAAR1 enabled preferential agonist design. Cell 2023; 186:5347-5362.e24. [PMID: 37963465 DOI: 10.1016/j.cell.2023.10.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/09/2023] [Accepted: 10/11/2023] [Indexed: 11/16/2023]
Abstract
Trace amine-associated receptor 1 (TAAR1) senses a spectrum of endogenous amine-containing metabolites (EAMs) to mediate diverse psychological functions and is useful for schizophrenia treatment without the side effects of catalepsy. Here, we systematically profiled the signaling properties of TAAR1 activation and present nine structures of TAAR1-Gs/Gq in complex with EAMs, clinical drugs, and synthetic compounds. These structures not only revealed the primary amine recognition pocket (PARP) harboring the conserved acidic D3.32 for conserved amine recognition and "twin" toggle switch for receptor activation but also elucidated that targeting specific residues in the second binding pocket (SBP) allowed modulation of signaling preference. In addition to traditional drug-induced Gs signaling, Gq activation by EAM or synthetic compounds is beneficial to schizophrenia treatment. Our results provided a structural and signaling framework for molecular recognition by TAAR1, which afforded structural templates and signal clues for TAAR1-targeted candidate compounds design.
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Affiliation(s)
- Pan Shang
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China; Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China
| | - Naikang Rong
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China; Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China
| | - Jing-Jing Jiang
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Jie Cheng
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China; Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China
| | - Ming-Hui Zhang
- Department of General Surgery, Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
| | - Dongwei Kang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan, Shandong 250012, China
| | - Lei Qi
- Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China; Biomedical Research Center for Structural Analysis, Shandong University, No.44 Wenhua Xi Road, Jinan, Shandong 250012, China
| | - Lulu Guo
- Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China
| | - Gong-Ming Yang
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Qun Liu
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China; Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China
| | - Zhenzhen Zhou
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan, Shandong 250012, China
| | - Xiao-Bing Li
- Medical Science and Technology Innovation Center, Shandong Institute of Brain Science and Brain-inspired Research, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Kong-Kai Zhu
- Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China
| | - Qing-Biao Meng
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Xiang Han
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Wenqi Yan
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Yalei Kong
- Songjiang Institute and Shanghai Songjiang District Central Hospital, Center for Brain Science in Shanghai Children's Medical Center, Department of Anatomy and Physiology, Ministry of Education, Shanghai Key Laboratory of Children's Environmental Health in Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lejin Yang
- Department of Psychology, Qilu Hospital of Shandong University, Jinan, China
| | - Xiaohui Wang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Dapeng Lei
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Xin Feng
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Xinyong Liu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan, Shandong 250012, China
| | - Xiao Yu
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China
| | - Yue Wang
- Medical Science and Technology Innovation Center, Shandong Institute of Brain Science and Brain-inspired Research, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China.
| | - Qian Li
- Songjiang Institute and Shanghai Songjiang District Central Hospital, Center for Brain Science in Shanghai Children's Medical Center, Department of Anatomy and Physiology, Ministry of Education, Shanghai Key Laboratory of Children's Environmental Health in Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Zhen-Hua Shao
- Division of Nephrology and Kidney Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.
| | - Fan Yang
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China; Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China.
| | - Jin-Peng Sun
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250012, China; Advanced Medical Research Institute and Meili Lake Translational Research Park, Shandong University, Jinan, Shandong 250012, China.
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8
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Wang JL, Dou XD, Cheng J, Gao MX, Xu GF, Ding W, Ding JH, Li Y, Wang SH, Ji ZW, Zhao XY, Huo TY, Zhang CF, Liu YM, Sha XY, Gao JR, Zhang WH, Hao Y, Zhang C, Sun JP, Jiao N, Yu X. Functional screening and rational design of compounds targeting GPR132 to treat diabetes. Nat Metab 2023; 5:1726-1746. [PMID: 37770763 DOI: 10.1038/s42255-023-00899-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 08/30/2023] [Indexed: 09/30/2023]
Abstract
Chronic inflammation due to islet-residing macrophages plays key roles in the development of type 2 diabetes mellitus. By systematically profiling intra-islet lipid-transmembrane receptor signalling in islet-resident macrophages, we identified endogenous 9(S)-hydroxy-10,12-octadecadienoic acid-G-protein-coupled receptor 132 (GPR132)-Gi signalling as a significant contributor to islet macrophage reprogramming and found that GPR132 deficiency in macrophages reversed metabolic disorders in mice fed a high-fat diet. The cryo-electron microscopy structures of GPR132 bound with two endogenous agonists, N-palmitoylglycine and 9(S)-hydroxy-10,12-octadecadienoic acid, enabled us to rationally design both GPR132 agonists and antagonists with high potency and selectivity through stepwise translational approaches. We ultimately identified a selective GPR132 antagonist, NOX-6-18, that modulates macrophage reprogramming within pancreatic islets, decreases weight gain and enhances glucose metabolism in mice fed a high-fat diet. Our study not only illustrates that intra-islet lipid signalling contributes to islet macrophage reprogramming but also provides a broadly applicable strategy for the identification of important G-protein-coupled receptor targets in pathophysiological processes, followed by the rational design of therapeutic leads for refractory diseases such as diabetes.
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Affiliation(s)
- Jia-Le Wang
- State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, China
| | - Xiao-Dong Dou
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Jie Cheng
- Advanced Medical Research Institute, Cheeloo College of Medicine, Shandong University, Jinan, China
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Ming-Xin Gao
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Guo-Feng Xu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Wei Ding
- Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Jin-Hui Ding
- State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, China
| | - Yu Li
- State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, China
| | - Si-Han Wang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Zhao-Wei Ji
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Xin-Yi Zhao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Tong-Yu Huo
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Cai-Fang Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Ya-Meng Liu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
- Changping Laboratory, Yard 28, Science Park Road, Chanaping District,, Beijing, China
| | - Xue-Ying Sha
- State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, China
| | - Jia-Rui Gao
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Wen-Hui Zhang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Yong Hao
- Department of Neurology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Cheng Zhang
- The Key Laboratory of Cardiovascular Remodelling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Qilu Hospital, Shandong University, Jinan, China
| | - Jin-Peng Sun
- State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, China.
- Advanced Medical Research Institute, Cheeloo College of Medicine, Shandong University, Jinan, China.
- NHC Key Laboratory of Otorhinolaryngology, Qilu hospital and advanced Medical Research Institute, Meili Lake Translational Research Park, Cheeloo College of Medicine, Shandong University, Jinan, China.
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China.
- Changping Laboratory, Yard 28, Science Park Road, Chanaping District,, Beijing, China.
| | - Xiao Yu
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, China.
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9
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Huang SM, Xiong MY, Liu L, Mu J, Wang MW, Jia YL, Cai K, Tie L, Zhang C, Cao S, Wen X, Wang JL, Guo SC, Li Y, Qu CX, He QT, Cai BY, Xue C, Gan S, Xie Y, Cong X, Yang Z, Kong W, Li S, Li Z, Xiao P, Yang F, Yu X, Guan YF, Zhang X, Liu Z, Yang BX, Du Y, Sun JP. Single hormone or synthetic agonist induces G s/G i coupling selectivity of EP receptors via distinct binding modes and propagating paths. Proc Natl Acad Sci U S A 2023; 120:e2216329120. [PMID: 37478163 PMCID: PMC10372679 DOI: 10.1073/pnas.2216329120] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 05/18/2023] [Indexed: 07/23/2023] Open
Abstract
To accomplish concerted physiological reactions, nature has diversified functions of a single hormone at at least two primary levels: 1) Different receptors recognize the same hormone, and 2) different cellular effectors couple to the same hormone-receptor pair [R.P. Xiao, Sci STKE 2001, re15 (2001); L. Hein, J. D. Altman, B.K. Kobilka, Nature 402, 181-184 (1999); Y. Daaka, L. M. Luttrell, R. J. Lefkowitz, Nature 390, 88-91 (1997)]. Not only these questions lie in the heart of hormone actions and receptor signaling but also dissecting mechanisms underlying these questions could offer therapeutic routes for refractory diseases, such as kidney injury (KI) or X-linked nephrogenic diabetes insipidus (NDI). Here, we identified that Gs-biased signaling, but not Gi activation downstream of EP4, showed beneficial effects for both KI and NDI treatments. Notably, by solving Cryo-electron microscope (cryo-EM) structures of EP3-Gi, EP4-Gs, and EP4-Gi in complex with endogenous prostaglandin E2 (PGE2)or two synthetic agonists and comparing with PGE2-EP2-Gs structures, we found that unique primary sequences of prostaglandin E2 receptor (EP) receptors and distinct conformational states of the EP4 ligand pocket govern the Gs/Gi transducer coupling selectivity through different structural propagation paths, especially via TM6 and TM7, to generate selective cytoplasmic structural features. In particular, the orientation of the PGE2 ω-chain and two distinct pockets encompassing agonist L902688 of EP4 were differentiated by their Gs/Gi coupling ability. Further, we identified common and distinct features of cytoplasmic side of EP receptors for Gs/Gi coupling and provide a structural basis for selective and biased agonist design of EP4 with therapeutic potential.
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Affiliation(s)
- Shen-Ming Huang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Meng-Yao Xiong
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
- Department of Pharmacology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Lei Liu
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong250012, China
| | - Jianqiang Mu
- Department of Immunology and Microbiology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong518055, China
| | - Ming-Wei Wang
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong250012, China
| | - Ying-Li Jia
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Kui Cai
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Lu Tie
- Department of Pharmacology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Chao Zhang
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong250012, China
| | - Sheng Cao
- School of Medicine, Kobilka Institute of Innovative Drug Discovery, Chinese University of Hong Kong, Shenzhen, Guangdong518172, China
| | - Xin Wen
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong250012, China
| | - Jia-Le Wang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Sheng-Chao Guo
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, Shandong250012, China
| | - Yu Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Chang-Xiu Qu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Qing-Tao He
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, Shandong250012, China
| | - Bo-Yang Cai
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Chenyang Xue
- Department of Immunology and Microbiology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong518055, China
| | - Shiyi Gan
- School of Medicine, Kobilka Institute of Innovative Drug Discovery, Chinese University of Hong Kong, Shenzhen, Guangdong518172, China
| | - Yihe Xie
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Xin Cong
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Zhao Yang
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong250012, China
| | - Wei Kong
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Shuo Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Zijian Li
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, Research, Beijing100191, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Peking University, Beijing100191, P. R. China
| | - Peng Xiao
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong250012, China
| | - Fan Yang
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, Shandong250012, China
- Advanced Medical Research Institute, Cheeloo College of Medicine, Shandong University, Jinan, Shandong250012, China
| | - Xiao Yu
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan, Shandong250012, China
| | - You-Fei Guan
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian116044, China
| | - Xiaoyan Zhang
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian116044, China
| | - Zhongmin Liu
- Department of Immunology and Microbiology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong518055, China
| | - Bao-Xue Yang
- Department of Pharmacology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
| | - Yang Du
- School of Medicine, Kobilka Institute of Innovative Drug Discovery, Chinese University of Hong Kong, Shenzhen, Guangdong518172, China
| | - Jin-Peng Sun
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing100191, China
- Key Laboratory Experimental Teratology of the Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong250012, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Peking University, Beijing100191, P. R. China
- Advanced Medical Research Institute, Cheeloo College of Medicine, Shandong University, Jinan, Shandong250012, China
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10
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Ramanadham S, Turk J, Bhatnagar S. Noncanonical Regulation of cAMP-Dependent Insulin Secretion and Its Implications in Type 2 Diabetes. Compr Physiol 2023; 13:5023-5049. [PMID: 37358504 PMCID: PMC10809800 DOI: 10.1002/cphy.c220031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
Impaired glucose tolerance (IGT) and β-cell dysfunction in insulin resistance associated with obesity lead to type 2 diabetes (T2D). Glucose-stimulated insulin secretion (GSIS) from β-cells occurs via a canonical pathway that involves glucose metabolism, ATP generation, inactivation of K ATP channels, plasma membrane depolarization, and increases in cytosolic concentrations of [Ca 2+ ] c . However, optimal insulin secretion requires amplification of GSIS by increases in cyclic adenosine monophosphate (cAMP) signaling. The cAMP effectors protein kinase A (PKA) and exchange factor activated by cyclic-AMP (Epac) regulate membrane depolarization, gene expression, and trafficking and fusion of insulin granules to the plasma membrane for amplifying GSIS. The widely recognized lipid signaling generated within β-cells by the β-isoform of Ca 2+ -independent phospholipase A 2 enzyme (iPLA 2 β) participates in cAMP-stimulated insulin secretion (cSIS). Recent work has identified the role of a G-protein coupled receptor (GPCR) activated signaling by the complement 1q like-3 (C1ql3) secreted protein in inhibiting cSIS. In the IGT state, cSIS is attenuated, and the β-cell function is reduced. Interestingly, while β-cell-specific deletion of iPLA 2 β reduces cAMP-mediated amplification of GSIS, the loss of iPLA 2 β in macrophages (MØ) confers protection against the development of glucose intolerance associated with diet-induced obesity (DIO). In this article, we discuss canonical (glucose and cAMP) and novel noncanonical (iPLA 2 β and C1ql3) pathways and how they may affect β-cell (dys)function in the context of impaired glucose intolerance associated with obesity and T2D. In conclusion, we provide a perspective that in IGT states, targeting noncanonical pathways along with canonical pathways could be a more comprehensive approach for restoring β-cell function in T2D. © 2023 American Physiological Society. Compr Physiol 13:5023-5049, 2023.
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Affiliation(s)
- Sasanka Ramanadham
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Alabama, USA
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Alabama, USA
| | - John Turk
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Sushant Bhatnagar
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Alabama, USA
- Department of Medicine, University of Alabama at Birmingham, Alabama, USA
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11
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Dallatana A, Cremonesi L, Trombetta M, Fracasso G, Nocini R, Giacomello L, Innamorati G. G Protein-Coupled Receptors and the Rise of Type 2 Diabetes in Children. Biomedicines 2023; 11:1576. [PMID: 37371671 DOI: 10.3390/biomedicines11061576] [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: 05/11/2023] [Revised: 05/26/2023] [Accepted: 05/27/2023] [Indexed: 06/29/2023] Open
Abstract
The human genome counts hundreds of GPCRs specialized to sense thousands of different extracellular cues, including light, odorants and nutrients in addition to hormones. Primordial GPCRs were likely glucose transporters that became sensors to monitor the abundance of nutrients and direct the cell to switch from aerobic metabolism to fermentation. Human β cells express multiple GPCRs that contribute to regulate glucose homeostasis, cooperating with many others expressed by a variety of cell types and tissues. These GPCRs are intensely studied as pharmacological targets to treat type 2 diabetes in adults. The dramatic rise of type 2 diabetes incidence in pediatric age is likely correlated to the rapidly evolving lifestyle of children and adolescents of the new century. Current pharmacological treatments are based on therapies designed for adults, while youth and puberty are characterized by a different hormonal balance related to glucose metabolism. This review focuses on GPCRs functional traits that are relevant for β cells function, with an emphasis on aspects that could help to differentiate new treatments specifically addressed to young type 2 diabetes patients.
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Affiliation(s)
- Alessia Dallatana
- Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37134 Verona, Italy
| | - Linda Cremonesi
- Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37134 Verona, Italy
| | - Maddalena Trombetta
- Section of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Verona, 37124 Verona, Italy
| | - Giulio Fracasso
- Department of Biomedical Sciences, University of Padova, 35131 Padova, Italy
| | - Riccardo Nocini
- Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37134 Verona, Italy
| | - Luca Giacomello
- Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37134 Verona, Italy
| | - Giulio Innamorati
- Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37134 Verona, Italy
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12
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Mao C, Xiao P, Tao XN, Qin J, He QT, Zhang C, Guo SC, Du YQ, Chen LN, Shen DD, Yang ZS, Zhang HQ, Huang SM, He YH, Cheng J, Zhong YN, Shang P, Chen J, Zhang DL, Wang QL, Liu MX, Li GY, Guo Y, Xu HE, Wang C, Zhang C, Feng S, Yu X, Zhang Y, Sun JP. Unsaturated bond recognition leads to biased signal in a fatty acid receptor. Science 2023; 380:eadd6220. [PMID: 36862765 DOI: 10.1126/science.add6220] [Citation(s) in RCA: 38] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 02/16/2023] [Indexed: 03/04/2023]
Abstract
Individual free fatty acids (FAs) play important roles in metabolic homeostasis, many through engagement with more than 40G protein-coupled receptors. Searching for receptors to sense beneficial omega-3 FAs of fish oil enabled the identification of GPR120, which is involved in a spectrum of metabolic diseases. Here, we report six cryo-electron microscopy structures of GPR120 in complex with FA hormones or TUG891 and Gi or Giq trimers. Aromatic residues inside the GPR120 ligand pocket were responsible for recognizing different double-bond positions of these FAs and connect ligand recognition to distinct effector coupling. We also investigated synthetic ligand selectivity and the structural basis of missense single-nucleotide polymorphisms. We reveal how GPR120 differentiates rigid double bonds and flexible single bonds. The knowledge gleaned here may facilitate rational drug design targeting to GPR120.
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Affiliation(s)
- Chunyou Mao
- Department of Biophysics and Department of Pathology of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Peng Xiao
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Xiao-Na Tao
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
- The Second Hospital of Shandong University, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Jiao Qin
- Department of Biophysics and Department of Pathology of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Qing-Tao He
- Department of Orthopedics, Qilu Hospital of Shandong University, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Chao Zhang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Sheng-Chao Guo
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Ya-Qin Du
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
| | - Li-Nan Chen
- Department of Biophysics and Department of Pathology of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Dan-Dan Shen
- Department of Biophysics and Department of Pathology of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Zhi-Shuai Yang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Han-Qiong Zhang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Shen-Ming Huang
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
| | - Yong-Hao He
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Jie Cheng
- Advanced Medical Research Institute, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
| | - Ya-Ni Zhong
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Pan Shang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
| | - Jun Chen
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Dao-Lai Zhang
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Qian-Lang Wang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Mei-Xia Liu
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Guo-Yu Li
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Yongyuan Guo
- Department of Orthopedics, Qilu Hospital of Shandong University, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - H Eric Xu
- CAS Key Laboratory of Receptor Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Chuanxin Wang
- The Second Hospital of Shandong University, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Cheng Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, the State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Shiqing Feng
- The Second Hospital of Shandong University, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
- Department of Orthopedics, Qilu Hospital of Shandong University, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Xiao Yu
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Physiology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
| | - Yan Zhang
- Department of Biophysics and Department of Pathology of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Liangzhu Laboratory, Zhejiang University Medical Center, Hangzhou 311121, China
- MOE Frontier Science Center for Brain Research and Brain-Machine Integration, Zhejiang University School of Medicine, Hangzhou 310058, China
- Research and Development Center for E-Learning, Ministry of Education, Beijing 100816, China
| | - Jin-Peng Sun
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
- Advanced Medical Research Institute, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
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McKillop AM, Miskelly MG, Moran BM, Flatt PR. Incretins play an important role in FFA4/GPR120 regulation of glucose metabolism by GW-9508. Life Sci 2023; 318:121475. [PMID: 36754346 DOI: 10.1016/j.lfs.2023.121475] [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: 10/14/2022] [Revised: 01/30/2023] [Accepted: 02/02/2023] [Indexed: 02/10/2023]
Abstract
AIMS To assess the role of GPR120 in glucose metabolism and incretin regulation from enteroendocrine L- and K-cells with determination of the cellular localisation of GPR120 in intestinal tissue and clonal Glucagon-Like Peptide-1 (GLP-1)/Gastric Inhibitory Polypeptide (GIP) cell lines. MAIN METHODS Anti-hyperglycaemic, insulinotropic and incretin secreting properties of the GPR120 agonist, GW-9508 were explored in combination with oral and intraperitoneal glucose tolerance tests (GTT) in lean, diabetic and incretin receptor knockout mice. Cellular localisation of GPR120 was assessed by double immunofluorescence. KEY FINDINGS Compared to intraperitoneal injection, oral administration of GW-9508 (0.1 μmol/kg body weight) together with glucose reduced the glycaemic excursion by 22-31 % (p < 0.05-p < 0.01) and enhanced glucose-induced insulin release by 30 % (p < 0.01) in normal mice. In high fat fed diabetic mice, orally administered GW-9508 lowered plasma glucose by 17-27 % (p < 0.05-p < 0.01) and augmented insulin release by 22-39 % (p < 0.05-p < 0.001). GW-9508 had no effect on the responses of GLP-1 receptor knockout mice and GIP receptor knockout mice. Consistent with this, oral GW-9508 increased circulating total GLP-1 release by 39-44 % (p < 0.01) and total GIP by 37-47 % (p < 0.01-p < 0.001) after 15 and 30 min in lean NIH Swiss mice. Immunocytochemistry demonstrated GPR120 expression on mouse enteroendocrine L- and K-cells, GLUTag cells and pGIP/Neo STC-1 cells. SIGNIFICANCE GPR120 is expressed on intestinal L- and K-cells and stimulates GLP-1/GIP secretory pathways involved in mediating enhanced insulin secretion and improved glucose tolerance, following oral GW-9508. These novel data strongly support the development of potent and selective GPR120 agonists as an effective therapeutic approach for diabetes.
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Affiliation(s)
- Aine M McKillop
- School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine BT52 1SA, Northern Ireland, UK.
| | - Michael G Miskelly
- School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine BT52 1SA, Northern Ireland, UK
| | - Brian M Moran
- School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine BT52 1SA, Northern Ireland, UK
| | - Peter R Flatt
- School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine BT52 1SA, Northern Ireland, UK
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14
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Yang Z, Cheng J, Shang P, Sun JP, Yu X. Emerging roles of olfactory receptors in glucose metabolism. Trends Cell Biol 2022; 33:463-476. [PMID: 36229334 DOI: 10.1016/j.tcb.2022.09.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/14/2022] [Accepted: 09/15/2022] [Indexed: 11/07/2022]
Abstract
Olfactory receptors (ORs) are widely expressed in extra-nasal tissues, where they participate in the regulation of divergent physiological processes. An increasing body of evidence over the past decade has revealed important regulatory roles for extra-nasal ORs in glucose metabolism. Recently, nonodorant endogenous ligands of ORs with metabolic significance have been identified, implying the therapeutic potential of ORs in the treatment of metabolic diseases, such as diabetes and obesity. In this review, we summarize current understanding of the expression patterns and functions of ORs in key tissues involved in glucose metabolism modulation, describe odorant and endogenous OR ligands, explain the biased signaling downstream of ORs, and outline OR therapeutic potential.
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Zhao YF. Free fatty acid receptors in the endocrine regulation of glucose metabolism: Insight from gastrointestinal-pancreatic-adipose interactions. Front Endocrinol (Lausanne) 2022; 13:956277. [PMID: 36246919 PMCID: PMC9554507 DOI: 10.3389/fendo.2022.956277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 09/14/2022] [Indexed: 11/25/2022] Open
Abstract
Glucose metabolism is primarily controlled by pancreatic hormones, with the coordinated assistance of the hormones from gastrointestine and adipose tissue. Studies have unfolded a sophisticated hormonal gastrointestinal-pancreatic-adipose interaction network, which essentially maintains glucose homeostasis in response to the changes in substrates and nutrients. Free fatty acids (FFAs) are the important substrates that are involved in glucose metabolism. FFAs are able to activate the G-protein coupled membrane receptors including GPR40, GPR120, GPR41 and GPR43, which are specifically expressed in pancreatic islet cells, enteroendocrine cells as well as adipocytes. The activation of FFA receptors regulates the secretion of hormones from pancreas, gastrointestine and adipose tissue to influence glucose metabolism. This review presents the effects of the FFA receptors on glucose metabolism via the hormonal gastrointestinal-pancreatic-adipose interactions and the underlying intracellular mechanisms. Furthermore, the development of therapeutic drugs targeting FFA receptors for the treatment of abnormal glucose metabolism such as type 2 diabetes mellitus is summarized.
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