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Fodor I, Osugi T, Matsubara S, Shiraishi A, Kawada T, Pirger Z, Satake H. Characterization of corazonin signaling in a molluscan model species, Lymnaea stagnalis. Gen Comp Endocrinol 2024; 357:114594. [PMID: 39047798 DOI: 10.1016/j.ygcen.2024.114594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Revised: 07/10/2024] [Accepted: 07/20/2024] [Indexed: 07/27/2024]
Abstract
In recent years, new concepts have emerged regarding the nomenclature, functions, and relationships of different peptide families of the gonadotropin-releasing hormone (GnRH) superfamily. One of the main driving forces for this originated from the emerging evidence that neuropeptides previously called molluscan GnRH are multifunctional and should be classified as corazonin (CRZ). However, research articles still appear that use incorrect nomenclature and attribute the same function to molluscan CRZs as vertebrate GnRHs. The aim of the present study was to further support the recent interpretation of the origin and function of the GnRH superfamily. Towards this goal, we report the characterization of CRZ signaling system in the molluscan model species, the great pond snail (Lymnaea stagnalis). We detected a CRZ-receptor-like sequence (Lym-CRZR) by homology-searching in the Lymnaea transcriptomes and the deduced amino acid sequence showed high sequence similarity to GnRH receptors and CRZ receptors. Molecular phylogenetic tree analysis demonstrated that Lym-CRZR is included in the cluster of molluscan CRZRs. Lym-CRZR transiently transfected into HEK293 cells was found to be localized at the plasma membrane, confirming that it functions as a membrane receptor, like other G protein-coupled receptors. The signaling assays revealed that the previously identified Lym-CRZ neuropeptide stimulated intracellular Ca2+ mobilization in a dose-dependent manner, but not cyclic AMP production, in HEK293 cells transfected with Lym-CRZR. Finally, we demonstrated a wide tissue distribution of Lym-CRZR. These results suggest that Lym-CRZ is a multifunctional peptide and provide further insights into the evolution of the GnRH neuropeptide superfamily. The present study also supports the notion that previously termed molluscan "GnRH" should be classified as "CRZ".
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Affiliation(s)
- István Fodor
- Ecophysiological and Environmental Toxicological Research Group, HUN-REN Balaton Limnological Research Institute, Tihany 8237, Hungary.
| | - Tomohiro Osugi
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Shin Matsubara
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Akira Shiraishi
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Tsuyoshi Kawada
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Zsolt Pirger
- Ecophysiological and Environmental Toxicological Research Group, HUN-REN Balaton Limnological Research Institute, Tihany 8237, Hungary
| | - Honoo Satake
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
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2
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Wu Y, Jensen N, Rossner MJ, Wehr MC. Exploiting Cell-Based Assays to Accelerate Drug Development for G Protein-Coupled Receptors. Int J Mol Sci 2024; 25:5474. [PMID: 38791511 PMCID: PMC11121687 DOI: 10.3390/ijms25105474] [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: 04/22/2024] [Revised: 05/10/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024] Open
Abstract
G protein-coupled receptors (GPCRs) are relevant targets for health and disease as they regulate various aspects of metabolism, proliferation, differentiation, and immune pathways. They are implicated in several disease areas, including cancer, diabetes, cardiovascular diseases, and mental disorders. It is worth noting that about a third of all marketed drugs target GPCRs, making them prime pharmacological targets for drug discovery. Numerous functional assays have been developed to assess GPCR activity and GPCR signaling in living cells. Here, we review the current literature of genetically encoded cell-based assays to measure GPCR activation and downstream signaling at different hierarchical levels of signaling, from the receptor to transcription, via transducers, effectors, and second messengers. Singleplex assay formats provide one data point per experimental condition. Typical examples are bioluminescence resonance energy transfer (BRET) assays and protease cleavage assays (e.g., Tango or split TEV). By contrast, multiplex assay formats allow for the parallel measurement of multiple receptors and pathways and typically use molecular barcodes as transcriptional reporters in barcoded assays. This enables the efficient identification of desired on-target and on-pathway effects as well as detrimental off-target and off-pathway effects. Multiplex assays are anticipated to accelerate drug discovery for GPCRs as they provide a comprehensive and broad identification of compound effects.
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Affiliation(s)
- Yuxin Wu
- Research Group Cell Signalling, Department of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Nussbaumstr. 7, 80336 Munich, Germany
- Systasy Bioscience GmbH, Balanstr. 6, 81669 Munich, Germany
| | - Niels Jensen
- Systasy Bioscience GmbH, Balanstr. 6, 81669 Munich, Germany
- Section of Molecular Neurobiology, Department of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Nussbaumstr. 7, 80336 Munich, Germany
| | - Moritz J. Rossner
- Systasy Bioscience GmbH, Balanstr. 6, 81669 Munich, Germany
- Section of Molecular Neurobiology, Department of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Nussbaumstr. 7, 80336 Munich, Germany
| | - Michael C. Wehr
- Research Group Cell Signalling, Department of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Nussbaumstr. 7, 80336 Munich, Germany
- Systasy Bioscience GmbH, Balanstr. 6, 81669 Munich, Germany
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3
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Gao C, Wang Z, Liu X, Sun R, Ma S, Ma Z, Wang Q, Li G, Zhang HT. The Construction and Application of a New Screening Method for Phosphodiesterase Inhibitors. BIOSENSORS 2024; 14:252. [PMID: 38785726 PMCID: PMC11117652 DOI: 10.3390/bios14050252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/14/2024] [Accepted: 05/15/2024] [Indexed: 05/25/2024]
Abstract
Phosphodiesterases (PDEs), a superfamily of enzymes that hydrolyze cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP), are recognized as a therapeutic target for various diseases. However, the current screening methods for PDE inhibitors usually experience problems due to complex operations and/or high costs, which are not conducive to drug development in respect of this target. In this study, a new method for screening PDE inhibitors based on GloSensor technology was successfully established and applied, resulting in the discovery of several novel compounds of different structural types with PDE inhibitory activity. Compared with traditional screening methods, this method is low-cost, capable of dynamically detecting changes in substrate concentration in live cells, and can be used to preliminarily determine the type of PDEs affected by the detected active compounds, making it more suitable for high-throughput screening for PDE inhibitors.
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Affiliation(s)
- Chunhua Gao
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao 266073, China; (C.G.); (Z.W.); (X.L.); (R.S.); (S.M.)
| | - Zhe Wang
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao 266073, China; (C.G.); (Z.W.); (X.L.); (R.S.); (S.M.)
| | - Xiaojing Liu
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao 266073, China; (C.G.); (Z.W.); (X.L.); (R.S.); (S.M.)
| | - Rongzhen Sun
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao 266073, China; (C.G.); (Z.W.); (X.L.); (R.S.); (S.M.)
| | - Shengyao Ma
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao 266073, China; (C.G.); (Z.W.); (X.L.); (R.S.); (S.M.)
| | - Zongchen Ma
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University, Qingdao 266003, China;
| | - Qi Wang
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao 266073, China; (C.G.); (Z.W.); (X.L.); (R.S.); (S.M.)
| | - Guoqiang Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University, Qingdao 266003, China;
| | - Han-Ting Zhang
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao 266073, China; (C.G.); (Z.W.); (X.L.); (R.S.); (S.M.)
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4
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Tse LH, Cheung ST, Lee S, Wong YH. Real-Time Determination of Intracellular cAMP Reveals Functional Coupling of G s Protein to the Melatonin MT 1 Receptor. Int J Mol Sci 2024; 25:2919. [PMID: 38474167 DOI: 10.3390/ijms25052919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 02/23/2024] [Accepted: 02/28/2024] [Indexed: 03/14/2024] Open
Abstract
Melatonin is a neuroendocrine hormone that regulates the circadian rhythm and many other physiological processes. Its functions are primarily exerted through two subtypes of human melatonin receptors, termed melatonin type-1 (MT1) and type-2 (MT2) receptors. Both MT1 and MT2 receptors are generally classified as Gi-coupled receptors owing to their well-recognized ability to inhibit cAMP accumulation in cells. However, it remains an enigma as to why melatonin stimulates cAMP production in a number of cell types that express the MT1 receptor. To address if MT1 can dually couple to Gs and Gi proteins, we employed a highly sensitive luminescent biosensor (GloSensorTM) to monitor the real-time changes in the intracellular cAMP level in intact live HEK293 cells that express MT1 and/or MT2. Our results demonstrate that the activation of MT1, but not MT2, leads to a robust enhancement on the forskolin-stimulated cAMP formation. In contrast, the activation of either MT1 or MT2 inhibited cAMP synthesis driven by the activation of the Gs-coupled β2-adrenergic receptor, which is consistent with a typical Gi-mediated response. The co-expression of MT1 with Gs enabled melatonin itself to stimulate cAMP production, indicating a productive coupling between MT1 and Gs. The possible existence of a MT1-Gs complex was supported through molecular modeling as the predicted complex exhibited structural and thermodynamic characteristics that are comparable to that of MT1-Gi. Taken together, our data reveal that MT1, but not MT2, can dually couple to Gs and Gi proteins, thereby enabling the bi-directional regulation of adenylyl cyclase to differentially modulate cAMP levels in cells that express different complements of MT1, MT2, and G proteins.
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Affiliation(s)
- Lap Hang Tse
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Hong Kong, China
| | - Suet Ting Cheung
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Hong Kong, China
| | - Seayoung Lee
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Hong Kong, China
| | - Yung Hou Wong
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Hong Kong, China
- State Key Laboratory of Molecular Neuroscience, Molecular Neuroscience Center, Hong Kong University of Science and Technology, Hong Kong, China
- Hong Kong Center for Neurodegenerative Diseases, 17 Science Park West Avenue, Hong Kong Science Park, Shatin, Hong Kong, China
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5
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Kim D, Lee J, Kwag R, Kim H, Oh H, Moon B, Kim HJ, Seong J, Jeon B, Kang T, Choo H. N
‐(Biphenyl‐3‐ylmethyl)ethanamines as G protein‐biased agonists of
5‐HT
7
R. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Doyoung Kim
- Brain Science Institute Korea Institute of Science and Technology Seoul Republic of Korea
- Department of Chemistry Sogang University Mapo‐gu, Seoul Republic of Korea
| | - Jieon Lee
- Brain Science Institute Korea Institute of Science and Technology Seoul Republic of Korea
- Division of Bio‐Medical Science and Technology, KIST School Korea University of Science and Technology Seongbuk‐gu, Seoul Republic of Korea
| | - Rina Kwag
- Brain Science Institute Korea Institute of Science and Technology Seoul Republic of Korea
- Department of Chemistry Korea University Seongbuk‐gu, Seoul Republic of Korea
| | - Hyunbin Kim
- Brain Science Institute Korea Institute of Science and Technology Seoul Republic of Korea
- Division of Bio‐Medical Science and Technology, KIST School Korea University of Science and Technology Seongbuk‐gu, Seoul Republic of Korea
| | - Hyunji Oh
- Brain Science Institute Korea Institute of Science and Technology Seoul Republic of Korea
- Department of Chemistry Sogang University Mapo‐gu, Seoul Republic of Korea
| | - Bongjin Moon
- Department of Chemistry Sogang University Mapo‐gu, Seoul Republic of Korea
| | - Hak Joong Kim
- Department of Chemistry Korea University Seongbuk‐gu, Seoul Republic of Korea
| | - Jihye Seong
- Brain Science Institute Korea Institute of Science and Technology Seoul Republic of Korea
- Division of Bio‐Medical Science and Technology, KIST School Korea University of Science and Technology Seongbuk‐gu, Seoul Republic of Korea
| | - Byungsun Jeon
- Brain Science Institute Korea Institute of Science and Technology Seoul Republic of Korea
| | - Taek Kang
- Brain Science Institute Korea Institute of Science and Technology Seoul Republic of Korea
| | - Hyunah Choo
- Brain Science Institute Korea Institute of Science and Technology Seoul Republic of Korea
- Division of Bio‐Medical Science and Technology, KIST School Korea University of Science and Technology Seongbuk‐gu, Seoul Republic of Korea
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6
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Wang FI, Ding G, Ng GS, Dixon SJ, Chidiac P. Luciferase-based GloSensor™ cAMP assay: Temperature optimization and application to cell-based kinetic studies. Methods 2021; 203:249-258. [PMID: 34737032 DOI: 10.1016/j.ymeth.2021.10.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 10/27/2021] [Accepted: 10/28/2021] [Indexed: 01/13/2023] Open
Abstract
G protein-coupled receptors (GPCRs) are an important receptor superfamily and common therapeutic targets. The second messenger cyclic adenosine monophosphate (cAMP) is a key mediator in many GPCR signaling pathways. Monitoring intracellular cAMP levels can help identify orthosteric agonists and antagonists, as well as allosteric modulators. In this regard, luminescence-based biosensors have revolutionized our ability to monitor GPCR signaling kinetics. The GloSensor™ cAMP assay enables real-time monitoring of signaling downstream of many GPCRs. However, it is crucial to optimize assay conditions such as temperature. As well, it has not been reported whether the effects of temperature on biosensor activity are reversible. Here, we describe the temperature sensitivity and reversibility of the GloSensor™ cAMP assay, and which GloSensor™ version is optimal for measuring cytosolic cAMP. We also present a detailed protocol for monitoring cAMP levels in live cells expressing endogenous or exogenous GPCRs. Temperature optimization studies were carried out using HEK293H cells transiently transfected with the adenosine receptor A2a and the GloSensor™ plasmid (pGloSensor-20F or -22F). We found that preincubation and luminescence reading at room temperature were optimal as compared to higher temperatures. As well, the GloSensor-22F biosensor had a superior signal-to-background ratio and the effect of temperature on biosensor activity was reversible. However, thermal instability of the biosensor may pose a problem for in vivo studies. Nevertheless, the GloSensor™ cAMP assay can be applied to analyze signaling by a wide range of GPCRs for drug discovery purposes.
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Affiliation(s)
- Fang I Wang
- Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, Canada
| | - Gucci Ding
- Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, Canada
| | - Garmen S Ng
- Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, Canada
| | - S Jeffrey Dixon
- Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, Canada
| | - Peter Chidiac
- Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, Canada.
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7
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Kwag R, Lee J, Kim D, Lee H, Yeom M, Woo J, Cho Y, Kim HJ, Kim J, Keum G, Jeon B, Choo H. Discovery of G Protein-Biased Antagonists against 5-HT 7R. J Med Chem 2021; 64:13766-13779. [PMID: 34519505 DOI: 10.1021/acs.jmedchem.1c01093] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
5-HT7R belongs to a family of G protein-coupled receptors and is associated with a variety of physiological processes in the central nervous system via the activation of the neurotransmitter serotonin (5-HT). To develop selective and biased 5-HT7R ligands, we designed and synthesized a series of pyrazolyl-diazepanes 2 and pyrazolyl-piperazines 3, which were evaluated for binding affinities to 5-HTR subtypes and functional selectivity for G protein and β-arrestin signaling pathways of 5-HT7R. Among them, 1-(3-(3-chlorophenyl)-1H-pyrazol-4-yl)-1,4-diazepane 2c showed the best binding affinity for 5-HT7R and selectivity over other 5-HTR subtypes. It was also revealed as a G protein-biased antagonist. The self-grooming behavior test was performed with 2c in vivo with Shank3-/- transgenic (TG) mice, wherein 2c significantly reduced self-grooming duration time to the level of wild-type mice. The results suggest that 5-HT7R could be a potential therapeutic target for treating autism spectrum disorder stereotypy.
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Affiliation(s)
- Rina Kwag
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea.,Department of Chemistry, Korea University, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jieon Lee
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea.,Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Doyoung Kim
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea.,Department of Chemistry, Sogang University, Mapo-gu, Seoul 04107, Republic of Korea
| | - Haeun Lee
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea.,Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Miyoung Yeom
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Jiwan Woo
- Research Animal Resource Center, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Yakdol Cho
- Research Animal Resource Center, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Hak Joong Kim
- Department of Chemistry, Korea University, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jeongjin Kim
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Gyochang Keum
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea.,Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Byungsun Jeon
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Hyunah Choo
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea.,Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
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8
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Lee J, Kwag R, Lee S, Kim D, Woo J, Cho Y, Kim HJ, Kim J, Jeon B, Choo H. Discovery of G Protein-Biased Ligands against 5-HT 7R. J Med Chem 2021; 64:7453-7467. [PMID: 34032427 DOI: 10.1021/acs.jmedchem.1c00110] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
There has been significant attention concerning the biased agonism of G protein-coupled receptors (GPCRs), and it has resulted in various pharmacological benefits. 5-HT7R belongs to a GPCR, and it is a promising pharmaceutical target for the treatment of neurodevelopmental and neuropsychiatric disorders. Based on our previous research, we synthesized a series of 6-chloro-2'-methoxy biphenyl derivatives 1, 2, and 3 with a variety of amine scaffolds. These compounds were evaluated for their binding affinities to 5-HTR subtypes and their functional selectivity toward the Gs protein and the β-arrestin signaling pathways of 5-HT7R. Among them, 2-(6-chloro-2'-methoxy-[1,1'-biphenyl]-3-yl)-N-ethylethan-1-amine, 2b, was found to be a G-protein-biased ligand of 5-HT7R. In an in vivo study with Shank3 transgenic mice, the self-grooming behavior test was performed with 2b, which increased the duration of self-grooming. The experiments further suggested that 5-HT7R is associated with autism spectrum disorders (ASDs) and could be a therapeutic target for the treatment of stereotypy in ASDs.
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Affiliation(s)
- Jieon Lee
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea.,Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Rina Kwag
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea.,Department of Chemistry, Korea University, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Soyeon Lee
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea.,Department of Chemistry, Korea University, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Doyoung Kim
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea.,Department of Chemistry, Sogang University, Mapo-gu, Seoul 04107, Republic of Korea
| | - Jiwan Woo
- Research Animal Resource Center, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Yakdol Cho
- Research Animal Resource Center, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Hak Joong Kim
- Department of Chemistry, Korea University, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jeongjin Kim
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Byungsun Jeon
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Hyunah Choo
- Brain Science Institute, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea.,Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology, Seongbuk-gu, Seoul 02792, Republic of Korea
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9
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Kim N, Shin S, Bae SW. cAMP Biosensors Based on Genetically Encoded Fluorescent/Luminescent Proteins. BIOSENSORS-BASEL 2021; 11:bios11020039. [PMID: 33572585 PMCID: PMC7911721 DOI: 10.3390/bios11020039] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 01/22/2021] [Accepted: 01/27/2021] [Indexed: 02/06/2023]
Abstract
Cyclic adenosine monophosphate (cAMP) plays a key role in signal transduction pathways as a second messenger. Studies on the cAMP dynamics provided useful scientific insights for drug development and treatment of cAMP-related diseases such as some cancers and prefrontal cortex disorders. For example, modulation of cAMP-mediated intracellular signaling pathways by anti-tumor drugs could reduce tumor growth. However, most early stage tools used for measuring the cAMP level in living organisms require cell disruption, which is not appropriate for live cell imaging or animal imaging. Thus, in the last decades, tools were developed for real-time monitoring of cAMP distribution or signaling dynamics in a non-invasive manner. Genetically-encoded sensors based on fluorescent proteins and luciferases could be powerful tools to overcome these drawbacks. In this review, we discuss the recent genetically-encoded cAMP sensors advances, based on single fluorescent protein (FP), Föster resonance energy transfer (FRET), single luciferase, and bioluminescence resonance energy transfer (BRET) for real-time non-invasive imaging.
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Affiliation(s)
- Namdoo Kim
- Department of Chemistry, Kongju National University, Gongju 32588, Korea;
| | - Seunghan Shin
- Green Chemistry & Materials Group, Korea Institute of Industrial Technology (KITECH), Cheonan 31056, Korea;
| | - Se Won Bae
- Green Chemistry & Materials Group, Korea Institute of Industrial Technology (KITECH), Cheonan 31056, Korea;
- Department of Chemistry and Cosmetics, Jeju National University, Jeju 63243, Korea
- Correspondence: ; Tel.: +82-64-754-3543
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10
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Yuan G, Qu X, Zheng B, Neelamegam R, Afshar S, Iyengar S, Pan C, Wang J, Kang HJ, Ondrechen MJ, Poutiainen P, El Fakhri G, Zhang Z, Brownell AL. Design, Synthesis, and Characterization of Benzimidazole Derivatives as Positron Emission Tomography Imaging Ligands for Metabotropic Glutamate Receptor 2. J Med Chem 2020; 63:12060-12072. [PMID: 32981322 DOI: 10.1021/acs.jmedchem.0c01394] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Three benzimidazole derivatives (13-15) have been synthetized as potential positron emission tomography (PET) imaging ligands for mGluR2 in the brain. Of these compounds, 13 exhibits potent binding affinity (IC50 = 7.6 ± 0.9 nM), positive allosteric modulator (PAM) activity (EC50 = 51.2 nM), and excellent selectivity against other mGluR subtypes (>100-fold). [11C]13 was synthesized via O-[11C]methylation of its phenol precursor 25 with [11C]methyl iodide. The achieved radiochemical yield was 20 ± 2% (n = 10, decay-corrected) based on [11C]CO2 with a radiochemical purity of >98% and molar activity of 98 ± 30 GBq/μmol EOS. Ex vivo biodistribution studies revealed reversible accumulation of [11C]13 and hepatobiliary and urinary excretions. PET imaging studies in rats demonstrated that [11C]13 accumulated in the mGluR2-rich brain regions. Pre-administration of mGluR2-selective PAM, 17 reduced the brain uptake of [11C]13, indicating a selective binding. Therefore, [11C]13 is a potential PET imaging ligand for mGluR2 in different central nervous system-related conditions.
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Affiliation(s)
- Gengyang Yuan
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 3rd Avenue, Charlestown, Massachusetts 02129, United States
| | - Xiying Qu
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 3rd Avenue, Charlestown, Massachusetts 02129, United States
| | - Baohui Zheng
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 3rd Avenue, Charlestown, Massachusetts 02129, United States
| | - Ramesh Neelamegam
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 3rd Avenue, Charlestown, Massachusetts 02129, United States
| | - Sepideh Afshar
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 3rd Avenue, Charlestown, Massachusetts 02129, United States
| | - Suhasini Iyengar
- Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Chuzhi Pan
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 3rd Avenue, Charlestown, Massachusetts 02129, United States
| | - Junfeng Wang
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 3rd Avenue, Charlestown, Massachusetts 02129, United States
| | - Hye Jin Kang
- Department of Pharmacology, University of North Carolina Chapel Hill School of Medicine, Chapel Hill, North Carolina 27514, United States
| | - Mary Jo Ondrechen
- Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Pekka Poutiainen
- Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital, Kuopio 70210, Finland
| | - Georges El Fakhri
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 3rd Avenue, Charlestown, Massachusetts 02129, United States
| | - Zhaoda Zhang
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129, United States
| | - Anna-Liisa Brownell
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 3rd Avenue, Charlestown, Massachusetts 02129, United States
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11
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Wang J, Qu X, Shoup TM, Yuan G, Afshar S, Pan C, Zhu A, Choi JK, Kang HJ, Poutiainen P, ElFakhri G, Zhang Z, Brownell AL. Synthesis and Characterization of Fluorine-18-Labeled N-(4-Chloro-3-((fluoromethyl- d2)thio)phenyl)picolinamide for Imaging of mGluR4 in Brain. J Med Chem 2020; 63:3381-3389. [PMID: 32081008 PMCID: PMC7261135 DOI: 10.1021/acs.jmedchem.0c00201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We have synthesized and characterized [18F]-N-(4-chloro-3-((fluoromethyl-d2)thio)phenyl)-picolinamide ([18F]15) as a potential ligand for the positron emission tomography (PET) imaging of mGluR4 in the brain. Radioligand [18F]15 displays central nervous system drug-like properties, including mGluR4 affinity, potent mGluR4 PAM activity, and selectivity against other mGluRs, as well as sufficient metabolic stability. Radiosynthesis was carried out in two steps. The radiochemical yield of [18F]15 was 11.6 ± 2.9% (n = 7, decay corrected) with a purity of 99% and a molar activity of 84.1 ± 11.8 GBq/μmol. Ex vivo biodistribution studies showed reversible binding of [18F]15 in all investigated tissues including the brain, liver, heart, lungs, and kidneys. PET imaging studies in male Sprague Dawley rats showed that [18F]15 accumulates in the brain regions known to express mGluR4. Pretreatment with the unlabeled mGluR4 PAM compounds 13 (methylthio analogue) and 15 showed significant dose-dependent blocking effects. These results suggest that [18F]15 is a promising radioligand for PET imaging mGluR4 in the brain.
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Affiliation(s)
- Junfeng Wang
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, MA 02114
| | - Xiying Qu
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, MA 02114
| | - Timothy M. Shoup
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, MA 02114
| | - Gengyang Yuan
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, MA 02114
| | - Sepideh Afshar
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, MA 02114
| | - Chuzhi Pan
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, MA 02114
- The Third Affiliated Hospital of Sun Yat-sen University, 510630, China
| | - Aijun Zhu
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, MA 02114
| | - Ji-Kyung Choi
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, 149 Thirteenth Street, Suite 2301 Charlestown, MA 02129
| | - Hye Jin Kang
- Department of Pharmacology, University of North Carolina Chapel Hill School of Medicine, Chapel Hill, North Carolina 27514, United States
| | | | - Georges ElFakhri
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, MA 02114
| | - Zhaoda Zhang
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, 149 Thirteenth Street, Suite 2301 Charlestown, MA 02129
| | - Anna-Liisa Brownell
- Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, 125 Nashua Street, Suite 660, Boston, MA 02114
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12
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Hammoud H, Elhabazi K, Quillet R, Bertin I, Utard V, Laboureyras E, Bourguignon JJ, Bihel F, Simonnet G, Simonin F, Schmitt M. Aminoguanidine Hydrazone Derivatives as Nonpeptide NPFF1 Receptor Antagonists Reverse Opioid Induced Hyperalgesia. ACS Chem Neurosci 2018; 9:2599-2609. [PMID: 29727163 DOI: 10.1021/acschemneuro.8b00099] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Neuropeptide FF receptors (NPFF1R and NPFF2R) and their endogenous ligand neuropeptide FF have been shown previously to display antiopioid properties and to play a critical role in the adverse effects associated with chronic administrations of opiates including the development of opioid-induced hyperalgesia and analgesic tolerance. In this work, we sought to identify novel NPFF receptors ligands by focusing our interest in a series of heterocycles as rigidified nonpeptide NPFF receptor ligands, starting from already described aminoguanidine hydrazones (AGHs). Binding experiments and functional assays highlighted AGH 1n and its rigidified analogue 2-amino-dihydropyrimidine 22e for in vivo experiments. As shown earlier with the prototypical dipeptide antagonist RF9, both 1n and 22e reduced significantly the long lasting fentanyl-induced hyperalgesia in rodents. Altogether these data indicate that AGH rigidification maintains nanomolar affinities for both NPFF receptors, while improving antagonist character toward NPFF1R.
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Affiliation(s)
- Hassan Hammoud
- University of Strasbourg, CNRS,
UMR7200, Faculty of Pharmacy, F-67401 Illkirch Graffenstaden, France
| | - Khadija Elhabazi
- Université
de Strasbourg, CNRS, Biotechnologie et Signalisation Cellulaire, UMR
7242, F-67401 Illkirch Graffenstaden, France
| | - Raphäelle Quillet
- Université
de Strasbourg, CNRS, Biotechnologie et Signalisation Cellulaire, UMR
7242, F-67401 Illkirch Graffenstaden, France
| | - Isabelle Bertin
- Université
de Strasbourg, CNRS, Biotechnologie et Signalisation Cellulaire, UMR
7242, F-67401 Illkirch Graffenstaden, France
| | - Valérie Utard
- Université
de Strasbourg, CNRS, Biotechnologie et Signalisation Cellulaire, UMR
7242, F-67401 Illkirch Graffenstaden, France
| | - Emilie Laboureyras
- Homéostasie-Allostasie-Pathologie-Réhabilitation,
UMR 5287 CNRS, Université de Bordeaux, 33076 Bordeaux, France
| | - Jean-Jacques Bourguignon
- University of Strasbourg, CNRS,
UMR7200, Faculty of Pharmacy, F-67401 Illkirch Graffenstaden, France
| | - Frédéric Bihel
- University of Strasbourg, CNRS,
UMR7200, Faculty of Pharmacy, F-67401 Illkirch Graffenstaden, France
| | - Guy Simonnet
- Homéostasie-Allostasie-Pathologie-Réhabilitation,
UMR 5287 CNRS, Université de Bordeaux, 33076 Bordeaux, France
| | - Frédéric Simonin
- Université
de Strasbourg, CNRS, Biotechnologie et Signalisation Cellulaire, UMR
7242, F-67401 Illkirch Graffenstaden, France
| | - Martine Schmitt
- University of Strasbourg, CNRS,
UMR7200, Faculty of Pharmacy, F-67401 Illkirch Graffenstaden, France
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13
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Tora AS, Rovira X, Cao AM, Cabayé A, Olofsson L, Malhaire F, Scholler P, Baik H, Van Eeckhaut A, Smolders I, Rondard P, Margeat E, Acher F, Pin JP, Goudet C. Chloride ions stabilize the glutamate-induced active state of the metabotropic glutamate receptor 3. Neuropharmacology 2018; 140:275-286. [PMID: 30102917 DOI: 10.1016/j.neuropharm.2018.08.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 07/25/2018] [Accepted: 08/09/2018] [Indexed: 02/06/2023]
Abstract
Due to the essential roles of glutamate, detection and response to a large range of extracellular concentrations of this excitatory amino acid are necessary for the fine-tuning of brain functions. Metabotropic glutamate receptors (mGluRs) are implicated in shaping the activity of many synapses in the central nervous system. Among the eight mGluR subtypes, there is increasing interest in studying the mGlu3 receptor which has recently been linked to various diseases, including psychiatric disorders. This receptor displays striking functional properties, with a high and, often, full basal activity, making its study elusive in heterologous systems. Here, we demonstrate that Cl- ions exert strong positive allosteric modulation of glutamate on the mGlu3 receptor. We have also identified the molecular and structural determinants lying behind this allostery: a unique interactive "chloride-lock" network. Indeed, Cl- ions dramatically stabilize the glutamate-induced active state of the extracellular domain of the mGlu3 receptor. Thus, the mGlu3 receptors' large basal activity does not correspond to a constitutive activity in absence of agonist. Instead, it results mostly from a Cl-mediated amplified response to low ambient glutamate concentrations, such as those measured in cell media. This strong interaction between glutamate and Cl- ions allows the mGlu3 receptor to sense and efficiently react to sub-micromolar concentrations of glutamate, making it the most sensitive member of mGluR family.
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Affiliation(s)
- Amélie S Tora
- IGF, CNRS, INSERM, Univ. de Montpellier, Montpellier, F-34094, Montpellier, France
| | - Xavier Rovira
- IGF, CNRS, INSERM, Univ. de Montpellier, Montpellier, F-34094, Montpellier, France; Present Address: Molecular Photopharmacology Research Group, The Tissue Repair and Regeneration Laboratory, University of Vic - Central University of Catalonia, C. de La Laura,13, 08500, Vic, Spain
| | - Anne-Marinette Cao
- Centre de Biochimie Structurale (CBS), INSERM, CNRS, Université de Montpellier, F-34094, Montpellier, France
| | - Alexandre Cabayé
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS UMR8601, Université Paris Descartes, Sorbonne Paris Cité, F-75270, Paris Cedex 6, France
| | - Linnéa Olofsson
- Centre de Biochimie Structurale (CBS), INSERM, CNRS, Université de Montpellier, F-34094, Montpellier, France
| | - Fanny Malhaire
- IGF, CNRS, INSERM, Univ. de Montpellier, Montpellier, F-34094, Montpellier, France
| | - Pauline Scholler
- IGF, CNRS, INSERM, Univ. de Montpellier, Montpellier, F-34094, Montpellier, France
| | - Hayeon Baik
- IGF, CNRS, INSERM, Univ. de Montpellier, Montpellier, F-34094, Montpellier, France
| | - Ann Van Eeckhaut
- Research Group Experimental Pharmacology (EFAR/FASC), Center for Neurosciences (C4N), Vrije Universiteit Brussel (VUB), 1090, Brussel, Belgium
| | - Ilse Smolders
- Research Group Experimental Pharmacology (EFAR/FASC), Center for Neurosciences (C4N), Vrije Universiteit Brussel (VUB), 1090, Brussel, Belgium
| | - Philippe Rondard
- IGF, CNRS, INSERM, Univ. de Montpellier, Montpellier, F-34094, Montpellier, France
| | - Emmanuel Margeat
- Centre de Biochimie Structurale (CBS), INSERM, CNRS, Université de Montpellier, F-34094, Montpellier, France
| | - Francine Acher
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS UMR8601, Université Paris Descartes, Sorbonne Paris Cité, F-75270, Paris Cedex 6, France.
| | - Jean-Philippe Pin
- IGF, CNRS, INSERM, Univ. de Montpellier, Montpellier, F-34094, Montpellier, France.
| | - Cyril Goudet
- IGF, CNRS, INSERM, Univ. de Montpellier, Montpellier, F-34094, Montpellier, France.
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14
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Kim Y, Kim H, Lee J, Lee JK, Min SJ, Seong J, Rhim H, Tae J, Lee HJ, Choo H. Discovery of β-Arrestin Biased Ligands of 5-HT 7R. J Med Chem 2018; 61:7218-7233. [PMID: 30028132 DOI: 10.1021/acs.jmedchem.8b00642] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Though many studies have been published about therapeutic potentials of selective 5-HT7R ligands, there have been few biased ligands of 5-HT7R. The development of potent and selective biased ligands of 5-HT7R would be of great help in understanding the relationship between pharmacological effects and G protein/β-arrestin signaling pathways of 5-HT7R. In order to identify 5-HT7R ligands with biased agonism, we designed and synthesized a series of tetrahydroazepine derivatives 1 and 2 with arylpyrazolo moiety or arylisoxazolo moiety. Through several biological evaluations such as binding affinity, selectivity profile, and functions in G protein and β-arrestin signaling pathways, 3-(4-chlorophenyl)-1,4,5,6,7,8-hexahydropyrazolo[3,4- d]azepine 1g was discovered as the β-arrestin biased ligand of 5-HT7R. In an electroencephalogram (EEG) test, 1g increased total non-rapid eye movement (NREM) sleep time and decreased total rapid eye movement (REM) sleep time.
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Affiliation(s)
- Youngjae Kim
- Center for Neuro-Medicine , Brain Research Institute, Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea.,Department of Chemistry , Yonsei University , Seoul 03722 , Republic of Korea
| | - Hyunguk Kim
- School of Electrical Engineering , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Republic of Korea
| | - Jieon Lee
- Center for Neuro-Medicine , Brain Research Institute, Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea.,Division of Bio-Medical Science & Technology, KIST School , Korea University of Science and Technology , Seoul 02792 , Republic of Korea
| | - Jae Kyun Lee
- Center for Neuro-Medicine , Brain Research Institute, Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
| | - Sun-Joon Min
- Department of Chemical & Molecular Engineering/Applied Chemistry , Hanyang University , Ansan , Gyeonggi-do 15588 , Republic of Korea
| | - Jihye Seong
- Center for Neuro-Medicine , Brain Research Institute, Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea.,Division of Bio-Medical Science & Technology, KIST School , Korea University of Science and Technology , Seoul 02792 , Republic of Korea.,Convergence Research Center for Diagnosis Treatment Care of Dementia , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
| | - Hyewhon Rhim
- Division of Bio-Medical Science & Technology, KIST School , Korea University of Science and Technology , Seoul 02792 , Republic of Korea.,Center for Neuroscience , Brain Research Institute, Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
| | - Jinsung Tae
- Department of Chemistry , Yonsei University , Seoul 03722 , Republic of Korea
| | - Hyunjoo Jenny Lee
- School of Electrical Engineering , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Republic of Korea
| | - Hyunah Choo
- Center for Neuro-Medicine , Brain Research Institute, Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea.,Division of Bio-Medical Science & Technology, KIST School , Korea University of Science and Technology , Seoul 02792 , Republic of Korea
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15
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Doornbos ML, Van der Linden I, Vereyken L, Tresadern G, IJzerman AP, Lavreysen H, Heitman LH. Constitutive activity of the metabotropic glutamate receptor 2 explored with a whole-cell label-free biosensor. Biochem Pharmacol 2018; 152:201-210. [DOI: 10.1016/j.bcp.2018.03.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 03/27/2018] [Indexed: 12/14/2022]
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16
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Synaptic adhesion protein ELFN1 is a selective allosteric modulator of group III metabotropic glutamate receptors in trans. Proc Natl Acad Sci U S A 2018; 115:5022-5027. [PMID: 29686062 DOI: 10.1073/pnas.1722498115] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Functional characterization of the GPCR interactome has been focused predominantly on intracellular interactions, yet GPCRs are increasingly found in complex with extracellular proteins. Extracellular leucine-rich repeat fibronectin type III domain containing 1 (ELFN1) was recently reported to physically anchor mGluR6 and mGluR7 across retinal and hippocampal synapses, respectively; however, the consequence of transsynaptic interactions on properties and pharmacology of these receptors are unknown. In the current study, we explore the effects of ELFN1 on mGluR signaling and pharmacology. First, we established the binding specificity of ELFN1 and found it to be recruited selectively to all group III mGluRs (mGluR4, mGluR6, mGluR7, and mGluR8), but not other mGluR species. Using site-directed mutagenesis we mapped binding determinants of this interaction to two distinct sites on the ELFN1 ectodomain. To evaluate functional aspects of the interaction, we developed a transcellular signaling assay in reconstituted HEK293 cells which monitors changes in mGluR activity in one cell following its exposure to separate ELFN1-containing cells. Using this platform, we found that ELFN1 acts as an allosteric modulator of class III mGluR activity in suppressing cAMP accumulation: altering both agonist-induced and constitutive receptor activity. Using bioluminescence resonance energy transfer-based real-time kinetic assays, we established that ELFN1 alters the ability of mGluRs to activate G proteins. Our findings demonstrate that core properties of class III mGluRs can be altered via extracellular interactions with ELFN1 which serves as a transsynaptic allosteric modulator for these receptors. Furthermore, our unique assay platform opens avenues for exploring transcellular/transsynaptic pharmacology of other GPCR transcomplexes.
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17
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Selvam C, Lemasson IA, Brabet I, Oueslati N, Karaman B, Cabaye A, Tora AS, Commare B, Courtiol T, Cesarini S, McCort-Tranchepain I, Rigault D, Mony L, Bessiron T, McLean H, Leroux FR, Colobert F, Daniel H, Goupil-Lamy A, Bertrand HO, Goudet C, Pin JP, Acher FC. Increased Potency and Selectivity for Group III Metabotropic Glutamate Receptor Agonists Binding at Dual sites. J Med Chem 2018; 61:1969-1989. [DOI: 10.1021/acs.jmedchem.7b01438] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Chelliah Selvam
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
| | - Isabelle A. Lemasson
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
| | - Isabelle Brabet
- IGF, CNRS, INSERM, Université Montpellier, F-34094 Montpellier, France
| | - Nadia Oueslati
- IGF, CNRS, INSERM, Université Montpellier, F-34094 Montpellier, France
| | - Berin Karaman
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
| | - Alexandre Cabaye
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
| | - Amélie S. Tora
- IGF, CNRS, INSERM, Université Montpellier, F-34094 Montpellier, France
| | - Bruno Commare
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
- UMR 7509/CNRS/ECPM, Université de Strasbourg, 25 Rue Becquerel, 67087 Strasbourg 02, France
| | - Tiphanie Courtiol
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
| | - Sara Cesarini
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
| | - Isabelle McCort-Tranchepain
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
| | - Delphine Rigault
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
| | - Laetitia Mony
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
- Institut de Biologie, Ecole Normale Supérieure, CNRS UMR 8197, INSERM U1024, PSL University, 46 rue d’Ulm, 75005 Paris, France
| | - Thomas Bessiron
- Pharmacologie et Biochimie de la Synapse, Université Paris-Sud/CNRS/NeuroPSI−UMR 9197, F-91405 Orsay, France
| | - Heather McLean
- Pharmacologie et Biochimie de la Synapse, Université Paris-Sud/CNRS/NeuroPSI−UMR 9197, F-91405 Orsay, France
| | - Frédéric R. Leroux
- UMR 7509/CNRS/ECPM, Université de Strasbourg, 25 Rue Becquerel, 67087 Strasbourg 02, France
| | - Françoise Colobert
- UMR 7509/CNRS/ECPM, Université de Strasbourg, 25 Rue Becquerel, 67087 Strasbourg 02, France
| | - Hervé Daniel
- Pharmacologie et Biochimie de la Synapse, Université Paris-Sud/CNRS/NeuroPSI−UMR 9197, F-91405 Orsay, France
| | - Anne Goupil-Lamy
- BIOVIA, Dassault Systèmes, 10 rue Marcel Dassault, CS 40501, 78946 Vélizy-Villacoublay Cedex, France
| | - Hugues-Olivier Bertrand
- BIOVIA, Dassault Systèmes, 10 rue Marcel Dassault, CS 40501, 78946 Vélizy-Villacoublay Cedex, France
| | - Cyril Goudet
- IGF, CNRS, INSERM, Université Montpellier, F-34094 Montpellier, France
| | - Jean-Philippe Pin
- IGF, CNRS, INSERM, Université Montpellier, F-34094 Montpellier, France
| | - Francine C. Acher
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
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18
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Goudet C, Rovira X, Llebaria A. Shedding light on metabotropic glutamate receptors using optogenetics and photopharmacology. Curr Opin Pharmacol 2018; 38:8-15. [DOI: 10.1016/j.coph.2018.01.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 01/30/2018] [Indexed: 11/27/2022]
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19
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Ballister ER, Rodgers J, Martial F, Lucas RJ. A live cell assay of GPCR coupling allows identification of optogenetic tools for controlling Go and Gi signaling. BMC Biol 2018; 16:10. [PMID: 29338718 PMCID: PMC5771134 DOI: 10.1186/s12915-017-0475-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 12/18/2017] [Indexed: 11/10/2022] Open
Abstract
Background Animal opsins are light-sensitive G-protein-coupled receptors (GPCRs) that enable optogenetic control over the major heterotrimeric G-protein signaling pathways in animal cells. As such, opsins have potential applications in both biomedical research and therapy. Selecting the opsin with the best balance of activity and selectivity for a given application requires knowing their ability to couple to a full range of relevant Gα subunits. We present the GsX assay, a set of tools based on chimeric Gs subunits that transduce coupling of opsins to diverse G proteins into increases in cAMP levels, measured with a real-time reporter in living cells. We use this assay to compare coupling to Gi/o/t across a panel of natural and chimeric opsins selected for potential application in gene therapy for retinal degeneration. Results Of the opsins tested, wild-type human rod opsin had the highest activity for chimeric Gs proxies for Gi and Gt (Gsi and Gst) and was matched in Go proxy (Gso) activity only by a human rod opsin/scallop opsin chimera. Rod opsin drove roughly equivalent responses via Gsi, Gso, and Gst, while cone opsins showed much lower activities with Gso than Gsi or Gst, and a human rod opsin/amphioxus opsin chimera demonstrated higher activity with Gso than with Gsi or Gst. We failed to detect activity for opsin chimeras bearing three intracellular fragments of mGluR6, and observed unexpectedly complex response profiles for scallop and amphioxus opsins thought to be specialized for Go. Conclusions These results identify rod opsin as the most potent non-selective Gi/o/t-coupled opsin, long-wave sensitive cone opsin as the best for selectively activating Gi/t over Go, and a rod opsin/amphioxus opsin chimera as the best choice for selectively activating Go over Gi/t. Electronic supplementary material The online version of this article (doi:10.1186/s12915-017-0475-2) contains supplementary material, which is available to authorized users.
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20
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Goulding J, May LT, Hill SJ. Characterisation of endogenous A 2A and A 2B receptor-mediated cyclic AMP responses in HEK 293 cells using the GloSensor™ biosensor: Evidence for an allosteric mechanism of action for the A 2B-selective antagonist PSB 603. Biochem Pharmacol 2017; 147:55-66. [PMID: 29106905 PMCID: PMC5770336 DOI: 10.1016/j.bcp.2017.10.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 10/23/2017] [Indexed: 01/13/2023]
Abstract
Endogenous adenosine A2B receptors (A2BAR) mediate cAMP accumulation in HEK 293 cells. Here we have used a biosensor to investigate the mechanism of action of the A2BAR antagonist PSB 603 in HEK 293 cells. The A2A agonist CGS 21680 elicited a small response in these cells (circa 20% of that obtained with NECA), suggesting that they also contain a small population of A2A receptors. The responses to NECA and adenosine were antagonised by PSB 603, but not by the selective A2AAR antagonist SCH 58261. In contrast, CGS 21680 responses were not antagonised by high concentrations of PSB 603, but were sensitive to inhibition by SCH 58261. Analysis of the effect of increasing concentrations of PSB 603 on the response to NECA indicated a non-competitive mode of action yielding a marked reduction in the NECA EMAX with no significant effect on EC50 values. Kinetics analysis of the effect of PSB 603 on the A2BAR-mediated NECA responses confirmed a saturable effect that was consistent with an allosteric mode of antagonism. The possibility that PSB 603 acts as a negative allosteric modulator of A2BAR suggests new approaches to the development of therapeutic agents to treat conditions where adenosine levels are high.
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Affiliation(s)
- Joelle Goulding
- Division of Physiology, Pharmacology and Neuroscience, School of Life Sciences, University of Nottingham, Nottingham NG7 2UH, UK; Centre of Membrane Proteins and Receptors (COMPARE), University of Birmingham and University of Nottingham, Midlands, UK
| | - Lauren T May
- Division of Physiology, Pharmacology and Neuroscience, School of Life Sciences, University of Nottingham, Nottingham NG7 2UH, UK
| | - Stephen J Hill
- Division of Physiology, Pharmacology and Neuroscience, School of Life Sciences, University of Nottingham, Nottingham NG7 2UH, UK; Centre of Membrane Proteins and Receptors (COMPARE), University of Birmingham and University of Nottingham, Midlands, UK.
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21
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Nederpelt I, Kuzikov M, de Witte WEA, Schnider P, Tuijt B, Gul S, IJzerman AP, de Lange ECM, Heitman LH. From receptor binding kinetics to signal transduction; a missing link in predicting in vivo drug-action. Sci Rep 2017; 7:14169. [PMID: 29075004 PMCID: PMC5658448 DOI: 10.1038/s41598-017-14257-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 10/09/2017] [Indexed: 11/12/2022] Open
Abstract
An important question in drug discovery is how to overcome the significant challenge of high drug attrition rates due to lack of efficacy and safety. A missing link in the understanding of determinants for drug efficacy is the relation between drug-target binding kinetics and signal transduction, particularly in the physiological context of (multiple) endogenous ligands. We hypothesized that the kinetic binding parameters of both drug and endogenous ligand play a crucial role in determining cellular responses, using the NK1 receptor as a model system. We demonstrated that the binding kinetics of both antagonists (DFA and aprepitant) and endogenous agonists (NKA and SP) have significantly different effects on signal transduction profiles, i.e. potency values, in vitro efficacy values and onset rate of signal transduction. The antagonistic effects were most efficacious with slowly dissociating aprepitant and slowly associating NKA while the combination of rapidly dissociating DFA and rapidly associating SP had less significant effects on the signal transduction profiles. These results were consistent throughout different kinetic assays and cellular backgrounds. We conclude that knowledge of the relationship between in vitro drug-target binding kinetics and cellular responses is important to ultimately improve the understanding of drug efficacy in vivo.
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Affiliation(s)
- Indira Nederpelt
- Division of Medicinal Chemistry, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 9502, 2300 RA, Leiden, The Netherlands
| | - Maria Kuzikov
- Fraunhofer IME Screening Port, Schnackenburgallee 114, D-22525, Hamburg, Germany
| | - Wilbert E A de Witte
- Division of Pharmacology, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 9502, 2300 RA, Leiden, The Netherlands
| | - Patrick Schnider
- Roche Pharmaceutical Research and Early Development, Small Molecule Research, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Bruno Tuijt
- Division of Medicinal Chemistry, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 9502, 2300 RA, Leiden, The Netherlands
| | - Sheraz Gul
- Fraunhofer IME Screening Port, Schnackenburgallee 114, D-22525, Hamburg, Germany
| | - Adriaan P IJzerman
- Division of Medicinal Chemistry, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 9502, 2300 RA, Leiden, The Netherlands
| | - Elizabeth C M de Lange
- Division of Pharmacology, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 9502, 2300 RA, Leiden, The Netherlands
| | - Laura H Heitman
- Division of Medicinal Chemistry, Leiden Academic Centre for Drug Research (LACDR), Leiden University, P.O. Box 9502, 2300 RA, Leiden, The Netherlands.
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22
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Ritter-Makinson SL, Paquet M, Bogenpohl JW, Rodin RE, Chris Yun C, Weinman EJ, Smith Y, Hall RA. Group II metabotropic glutamate receptor interactions with NHERF scaffold proteins: Implications for receptor localization in brain. Neuroscience 2017; 353:58-75. [PMID: 28392297 DOI: 10.1016/j.neuroscience.2017.03.060] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 03/29/2017] [Accepted: 03/29/2017] [Indexed: 12/13/2022]
Abstract
The group II metabotropic glutamate receptors mGluR2 and mGluR3 are key modulators of glutamatergic neurotransmission. In order to identify novel Group II metabotropic glutamate receptor (mGluR)-interacting partners, we screened the C-termini of mGluR2 and mGluR3 for interactions with an array of PDZ domains. These screens identified the Na+/H+ exchanger regulatory factors 1 and 2 (NHERF-1 & -2) as candidate interacting partners. Follow-up co-immunoprecipitation studies demonstrated that both mGluR2 and mGluR3 can associate with NHERF-1 and NHERF-2 in a cellular context. Functional studies revealed that disruption of PDZ interactions with mGluR2 enhanced receptor signaling to Akt. However, further studies of mGluR2 and mGluR3 signaling in astrocytes in which NHERF expression was reduced by gene knockout (KO) and/or siRNA knockdown techniques revealed that the observed differences in signaling between WT and mutant mGluR2 were likely not due to disruption of interactions with the NHERF proteins. Electron microscopic analyses revealed that Group II mGluRs were primarily expressed in glia and unmyelinated axons in WT, NHERF-1 and NHERF-2 KO mice, but the relative proportion of labeled axons over glial processes was higher in NHERF-2 KO mice than in controls and NHERF-1 KO mice. Interestingly, our anatomical studies also revealed that loss of either NHERF protein results in ventriculomegaly, which may be related to the high incidence of hydrocephaly that has previously been observed in NHERF-1 KO mice. Together, these studies support a role for NHERF-1 and NHERF-2 in regulating the distribution of Group II mGluRs in the murine brain, while conversely the effects of the mGluR2/3 PDZ-binding motifs on receptor signaling are likely mediated by interactions with other PDZ scaffold proteins beyond the NHERF proteins.
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Affiliation(s)
| | - Maryse Paquet
- Department of Pharmacology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - James W Bogenpohl
- Yerkes National Primate Research Center, Emory University, Atlanta, GA 30329, USA
| | - Rachel E Rodin
- Department of Pharmacology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - C Chris Yun
- Department of Medicine, Division of Digestive Diseases, Emory University School of Medicine, Atlanta, GA 30329, USA
| | - Edward J Weinman
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Yoland Smith
- Yerkes National Primate Research Center, Emory University, Atlanta, GA 30329, USA; Department of Neurology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Randy A Hall
- Department of Pharmacology, Emory University School of Medicine, Atlanta, GA 30322, USA.
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23
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Emery AC, Alvarez RA, Abboud P, Xu W, Westover CD, Eiden MV, Eiden LE. C-terminal amidation of PACAP-38 and PACAP-27 is dispensable for biological activity at the PAC1 receptor. Peptides 2016; 79:39-48. [PMID: 26976270 PMCID: PMC4842133 DOI: 10.1016/j.peptides.2016.03.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 01/30/2016] [Accepted: 03/09/2016] [Indexed: 01/29/2023]
Abstract
PACAP-27 and PACAP-38 are the exclusive physiological ligands for the mammalian PAC1 receptor. The role of C-terminal amidation of these ligands at that receptor was examined in neuroendocrine cells expressing the PAC1 receptor endogenously and in non-neuroendocrine cells in which the human and rat PAC1 receptors were expressed from stable single-copy genes driven by the CMV promoter, providing stoichiometrically appropriate levels of this Gs-coupled GPCR in order to examine the potency and intrinsic activity of PACAP ligands and their des-amidated congeners. We found that replacement of the C-terminal glycine residues of PACAP-27 and -38 with a free acid; or extension of either peptide with the two to three amino acids normally found at these positions in PACAP processing intermediates in vivo following endoproteolytic cleavage and after exoproteolytic trimming and glycine-directed amidated, were equivalent in potency to the fully processed peptides in a variety of cell-based assays. These included real-time monitoring of cyclic AMP generation in both NS-1 neuroendocrine cells and non-neuroendocrine HEK293 cells; PKA-dependent gene activation in HEK293 cells; and neuritogenesis and cell growth arrest in NS-1 cells. The specific implications for the role of amidation in arming of secretin-related neuropeptides for biological function, and the general implications for neuropeptide-based delivery in the context of gene therapy, are discussed.
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Affiliation(s)
- Andrew C Emery
- Section on Molecular Neuroscience, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, Bethesda, MD 20892, USA
| | - Ryan A Alvarez
- Section on Molecular Neuroscience, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, Bethesda, MD 20892, USA
| | - Philip Abboud
- Section on Molecular Neuroscience, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, Bethesda, MD 20892, USA
| | - Wenqin Xu
- Section on Directed Gene Transfer, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, Bethesda, MD 20892, USA
| | - Craig D Westover
- Section on Directed Gene Transfer, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, Bethesda, MD 20892, USA
| | - Maribeth V Eiden
- Section on Directed Gene Transfer, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, Bethesda, MD 20892, USA
| | - Lee E Eiden
- Section on Molecular Neuroscience, Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health, Bethesda, MD 20892, USA.
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24
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Felouzis V, Hermand P, de Laissardière GT, Combadière C, Deterre P. Comprehensive analysis of chemokine-induced cAMP-inhibitory responses using a real-time luminescent biosensor. Cell Signal 2015; 28:120-9. [PMID: 26515128 DOI: 10.1016/j.cellsig.2015.10.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 10/23/2015] [Indexed: 01/29/2023]
Abstract
Chemokine receptors are members of the G-protein-coupled receptor (GPCR) family coupled to members of the Gi class, whose primary function is to inhibit the cellular adenylate cyclase. We used a cAMP-related and PKA-based luminescent biosensor (GloSensor™ F-22) to monitor the real-time downstream response of chemokine receptors, especially CX3CR1 and CXCR4, after activation with their cognate ligands CX3CL1 and CXCL12. We found that the amplitudes and kinetic profiles of the chemokine responses were conserved in various cell types and were independent of the nature and concentration of the molecules used for cAMP prestimulation, including either the adenylate cyclase activator forskolin or ligands mediating Gs-mediated responses like prostaglandin E2 or beta-adrenergic agonist. We conclude that the cAMP chemokine response is robustly conserved in various inflammatory conditions. Moreover, the cAMP-related luminescent biosensor appears as a valuable tool to analyze the details of Gi-mediated cAMP-inhibitory cellular responses, even in native conditions and could help to decipher their precise role in cell function.
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Affiliation(s)
- Virginia Felouzis
- Sorbonne Universités, UPMC Université Paris 06, Inserm U 1135, CNRS ERL 8255, Centre d'Immunologie et des Maladies Infectieuses, 91 Boulevard de l'Hôpital, F-75013 Paris, France
| | - Patricia Hermand
- Sorbonne Universités, UPMC Université Paris 06, Inserm U 1135, CNRS ERL 8255, Centre d'Immunologie et des Maladies Infectieuses, 91 Boulevard de l'Hôpital, F-75013 Paris, France
| | - Guy Trambly de Laissardière
- Université de Cergy-Pontoise, CNRS, UMR 8089, Laboratoire de Physique Théorique et Modélisation, 2 Avenue A. Chauvin, F-95302 Cergy-Pontoise, France
| | - Christophe Combadière
- Sorbonne Universités, UPMC Université Paris 06, Inserm U 1135, CNRS ERL 8255, Centre d'Immunologie et des Maladies Infectieuses, 91 Boulevard de l'Hôpital, F-75013 Paris, France
| | - Philippe Deterre
- Sorbonne Universités, UPMC Université Paris 06, Inserm U 1135, CNRS ERL 8255, Centre d'Immunologie et des Maladies Infectieuses, 91 Boulevard de l'Hôpital, F-75013 Paris, France.
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25
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Li J, Meng H, Cao W, Qiu T. MiR-335 is involved in major depression disorder and antidepressant treatment through targeting GRM4. Neurosci Lett 2015; 606:167-72. [PMID: 26314506 DOI: 10.1016/j.neulet.2015.08.038] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 07/30/2015] [Accepted: 08/20/2015] [Indexed: 01/28/2023]
Abstract
Major depressive disorder (MDD) is a prevalent mood disorder. Treatment of MDD includes a variety of biopsychosocial approaches. Glutamate receptor, metabotropic 4 (GRM4) has been implicated in the regulation of MDD and it is seen as an attractive target for drug discovery and development. Here we reported using cellular assays and blood samples from MDD patients and showed that miR-335 was downregulated in individuals with depression compared with healthy controls. Additionally, we confirmed that miR-335 can directly target GRM4, which can further regulated the expression of miR-335. Antidepressant drug treatment with citalopram can upregulate miR-335 expression and downregulate GRM4 expression. These results suggest that miR-335 is associated with the pathophysiology of depression and is a potential target for new antidepressant treatments.
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Affiliation(s)
- Jing Li
- Department of Psychiatry, the First Affiliated Hospital of Chongqing Medical University,Chongqing 400016, China
| | - Huaqing Meng
- Department of Psychiatry, the First Affiliated Hospital of Chongqing Medical University,Chongqing 400016, China.
| | - Wan Cao
- Department of Psychiatry, the First Affiliated Hospital of Chongqing Medical University,Chongqing 400016, China
| | - Tian Qiu
- Department of Psychiatry, the First Affiliated Hospital of Chongqing Medical University,Chongqing 400016, China
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26
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Atypical signaling of metabotropic glutamate receptor 1 in human melanoma cells. Biochem Pharmacol 2015; 98:182-9. [PMID: 26291396 DOI: 10.1016/j.bcp.2015.08.091] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 08/12/2015] [Indexed: 11/21/2022]
Abstract
The metabotropic glutamate 1 (mGlu1) receptor has emerged as a novel target for the treatment of metastatic melanoma and various other cancers. Our laboratory has demonstrated that a selective, non-competitive mGlu1 receptor antagonist slows human melanoma growth in vitro and in vivo. In this study, we sought to determine if the activation of a canonical G protein-dependent signal transduction cascade, which is often used as an output of mGlu1 receptor activity in neuronal cells, correlated with mGlu1 receptor-mediated melanoma cell viability. Glutamate, the endogenous ligand of mGlu1 receptors, significantly increased melanoma cell viability, but did not stimulate phosphoinositide (PI) hydrolysis in several human melanoma cell lines. In contrast, melanoma cell viability was not increased by quisqualate, a highly potent mGlu1 receptor agonist, or DHPG, a selective group I mGlu receptor agonist. Similarly to glutamate, quisqualate also failed to stimulate PI hydrolysis in mGlu1 receptor-expressing melanoma cells. These results suggest that the canonical G protein-dependent signal transduction cascade is not coupled to mGlu1 receptors in all human melanoma cells. On the other hand, dynamin inhibition selectively decreased viability of mGlu1 receptor-expressing melanoma cells, suggesting that a mechanism requiring internalization may control melanoma cell viability. Taken together, these data demonstrate that the approaches commonly used to study mGlu1 receptor function and signaling in other systems may be inappropriate for studying mGlu1 receptor-mediated melanoma cell viability.
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27
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DiRaddo JO, Miller EJ, Bowman-Dalley C, Wroblewska B, Javidnia M, Grajkowska E, Wolfe BB, Liotta DC, Wroblewski JT. Chloride is an Agonist of Group II and III Metabotropic Glutamate Receptors. Mol Pharmacol 2015; 88:450-9. [DOI: 10.1124/mol.114.096420] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 06/18/2015] [Indexed: 01/07/2023] Open
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28
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Partridge JG. Utilizing GCaMP transgenic mice to monitor endogenous Gq/11-coupled receptors. Front Pharmacol 2015; 6:42. [PMID: 25805995 PMCID: PMC4353298 DOI: 10.3389/fphar.2015.00042] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 02/17/2015] [Indexed: 01/12/2023] Open
Abstract
The family of GCaMPs are engineered proteins that contain Ca2+ binding motifs within a circularly permutated variant of the Aequorea Victoria green fluorescent protein (cp-GFP). The rapidly advancing field of utilizing GCaMP reporter constructs represents a major step forward in our ability to monitor intracellular Ca2+ dynamics. With the use of these genetically encoded Ca2+ sensors, investigators have studied activation of endogenous Gq types of G protein-coupled receptors (GPCRs) and subsequent rises in intracellular calcium. Escalations in intracellular Ca2+ from GPCR activation can be faithfully monitored in space and time as an increase in fluorescent emission from these proteins. Further, transgenic mice are now commercially available that express GCaMPs in a Cre recombinase dependent fashion. These GCaMP reporter mice can be bred to distinct Cre recombinase driver mice to direct expression of this sensor in unique populations of cells. Concerning the central nervous system (CNS), sources of calcium influx, including those arising from Gq activation can be observed in targeted cell types like neurons or astrocytes. This powerful genetic method allows simultaneous monitoring of the activity of dozens of cells upon activation of endogenous Gq-coupled GPCRs. Therefore, in combination with pharmacological tools, this strategy of monitoring GPCR activation is amenable to analysis of orthosteric and allosteric ligands of Gq-coupled receptors in their endogenous environments.
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Affiliation(s)
- John G Partridge
- Department of Pharmacology and Physiology, Georgetown University School of Medicine , Washington, DC, USA ; Interdisciplinary Program in Neuroscience, Georgetown University School of Medicine , Washington, DC, USA
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29
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Chruścicka B, Burnat G, Brański P, Chorobik P, Lenda T, Marciniak M, Pilc A. Tetracycline-based system for controlled inducible expression of group III metabotropic glutamate receptors. ACTA ACUST UNITED AC 2014; 20:350-8. [PMID: 25394730 DOI: 10.1177/1087057114559183] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A stable and inducible expression of metabotropic glutamate receptor type 4, 7, and 8 was obtained in T-REx 293 cells using the tetracycline system. Tetracycline administration to the cell medium resulted in rapid induction and time-dependent expression of mGlu receptors, which also correlates with its functionality in a cAMP accumulation assay. The pharmacological properties of recombinant mGlu receptors were verified using orthosteric and allosteric ligands. Data suggest that the Tet-on inducible system is suitable for functional mGlu receptors' expression and characterization by means of the cAMP accumulation assay. It makes this system a precise, reproducible, and large-scale screening method, as well as a reasonable tool to study signaling properties of mGlu receptors.
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Affiliation(s)
- Barbara Chruścicka
- Department of Neurobiology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Smętna, Poland
| | - Grzegorz Burnat
- Department of Neurobiology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Smętna, Poland
| | - Piotr Brański
- Department of Neurobiology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Smętna, Poland
| | - Paulina Chorobik
- Department of Neurobiology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Smętna, Poland
| | - Tomasz Lenda
- Department of Neuropsychopharmacology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Smętna, Poland
| | - Marcin Marciniak
- Department of Neurobiology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Smętna, Poland
| | - Andrzej Pilc
- Department of Neurobiology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Smętna, Poland Faculty of Health Sciences, Medical College, Jagiellonian University, Kraków, Grzegórzecka, Poland
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30
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Lim SAO, Kang UJ, McGehee DS. Striatal cholinergic interneuron regulation and circuit effects. Front Synaptic Neurosci 2014; 6:22. [PMID: 25374536 PMCID: PMC4204445 DOI: 10.3389/fnsyn.2014.00022] [Citation(s) in RCA: 145] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 09/05/2014] [Indexed: 01/11/2023] Open
Abstract
The striatum plays a central role in motor control and motor learning. Appropriate responses to environmental stimuli, including pursuit of reward or avoidance of aversive experience all require functional striatal circuits. These pathways integrate synaptic inputs from limbic and cortical regions including sensory, motor and motivational information to ultimately connect intention to action. Although many neurotransmitters participate in striatal circuitry, one critically important player is acetylcholine (ACh). Relative to other brain areas, the striatum contains exceptionally high levels of ACh, the enzymes that catalyze its synthesis and breakdown, as well as both nicotinic and muscarinic receptor types that mediate its postsynaptic effects. The principal source of striatal ACh is the cholinergic interneuron (ChI), which comprises only about 1-2% of all striatal cells yet sends dense arbors of projections throughout the striatum. This review summarizes recent advances in our understanding of the factors affecting the excitability of these neurons through acute effects and long term changes in their synaptic inputs. In addition, we discuss the physiological effects of ACh in the striatum, and how changes in ACh levels may contribute to disease states during striatal dysfunction.
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Affiliation(s)
| | - Un Jung Kang
- Department of Neurology, Columbia University New York, NY, USA
| | - Daniel S McGehee
- Committee on Neurobiology, University of Chicago Chicago, IL, USA ; Department of Anesthesia and Critical Care, University of Chicago Chicago, IL, USA
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