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Rae M, Gomes I, Spelta LEW, Bailey A, Marcourakis T, Devi L, Camarini R. Environmental enrichment enhances ethanol preference over social reward in male swiss mice: Involvement of oxytocin-dopamine interactions. Neuropharmacology 2024; 253:109971. [PMID: 38705568 PMCID: PMC11145911 DOI: 10.1016/j.neuropharm.2024.109971] [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: 12/22/2023] [Revised: 03/18/2024] [Accepted: 04/25/2024] [Indexed: 05/07/2024]
Abstract
The impact of environmental enrichment (EE) on natural rewards, including social and appetitive rewards, was investigated in male Swiss mice. EE, known for providing animals with various stimuli, was assessed for its effects on conditioned place preference (CPP) associated with ethanol and social stimuli. We previously demonstrated that EE increased the levels of the prosocial neuropeptide oxytocin (OT) in the hypothalamus and enhanced ethanol rewarding effects via an oxytocinergic mechanism. This study also investigated the impact of EE on social dominance and motivation for rewards, measured OT-mediated phospholipase C (PLC) activity in striatal membranes, and assessed OT expression in the hypothalamus. The role of dopamine in motivating rewards was considered, along with the interaction between OT and D1 receptors (DR) in the nucleus accumbens (NAc). Results showed that EE mice exhibited a preference for ethanol reward over social reward, a pattern replicated by the OT analogue Carbetocin. EE mice demonstrated increased social dominance and reduced motivation for appetitive taste stimuli. Higher OT mRNA levels in the hypothalamus were followed by diminished OT receptor (OTR) signaling activity in the striatum of EE mice. Additionally, EE mice displayed elevated D1R expression, which was attenuated by the OTR antagonist (L-368-889). The findings underscore the reinforcing effect of EE on ethanol and social rewards through an oxytocinergic mechanism. Nonetheless, they suggest that mechanisms other than the prosocial effect of EE may contribute to the ethanol pro-rewarding effect of EE and Carbetocin. They also point towards an OT-dopamine interaction potentially underlying some of these effects.
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Affiliation(s)
- Mariana Rae
- Department of Pharmacology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, 05508-900, Brazil; Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States
| | - Ivone Gomes
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States
| | - Lidia Emmanuela Wiazowski Spelta
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, SP, 05508-000, Brazil
| | - Alexis Bailey
- Pharmacology Section, Institute of Medical and Biomedical Education, St George's University of London, London, UK
| | - Tania Marcourakis
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, SP, 05508-000, Brazil
| | - Lakshmi Devi
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States
| | - Rosana Camarini
- Department of Pharmacology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, 05508-900, Brazil.
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2
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Franchini L, Porter JJ, Lueck JD, Orlandi C. Gz Enhanced Signal Transduction assaY (G ZESTY) for GPCR deorphanization. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.26.605282. [PMID: 39091869 PMCID: PMC11291178 DOI: 10.1101/2024.07.26.605282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
G protein-coupled receptors (GPCRs) are key pharmacological targets, yet many remain underutilized due to unknown activation mechanisms and ligands. Orphan GPCRs, lacking identified natural ligands, are a high priority for research, as identifying their ligands will aid in understanding their functions and potential as drug targets. Most GPCRs, including orphans, couple to Gi/o/z family members, however current assays to detect their activation are limited, hindering ligand identification efforts. We introduce GZESTY, a highly sensitive, cell-based assay developed in an easily deliverable format designed to study the pharmacology of Gi/o/z-coupled GPCRs and assist in deorphanization. We optimized assay conditions and developed an all-in-one vector employing novel cloning methods to ensure the correct expression ratio of GZESTY components. GZESTY successfully assessed activation of a library of ligand-activated GPCRs, detecting both full and partial agonism, as well as responses from endogenous GPCRs. Notably, with GZESTY we established the presence of endogenous ligands for GPR176 and GPR37 in brain extracts, validating its use in deorphanization efforts. This assay enhances the ability to find ligands for orphan GPCRs, expanding the toolkit for GPCR pharmacologists.
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Affiliation(s)
- Luca Franchini
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Joseph J. Porter
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - John D. Lueck
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Cesare Orlandi
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY 14642, USA
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3
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Xu C, Wang Y, Ni H, Yao M, Cheng L, Lin X. The role of orphan G protein-coupled receptors in pain. Heliyon 2024; 10:e28818. [PMID: 38590871 PMCID: PMC11000026 DOI: 10.1016/j.heliyon.2024.e28818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 03/22/2024] [Accepted: 03/25/2024] [Indexed: 04/10/2024] Open
Abstract
G protein-coupled receptors (GPCRs), which form the largest family of membrane protein receptors in humans, are highly complex signaling systems with intricate structures and dynamic conformations and locations. Among these receptors, a specific subset is referred to as orphan GPCRs (oGPCRs) and has garnered significant interest in pain research due to their role in both central and peripheral nervous system function. The diversity of GPCR functions is attributed to multiple factors, including allosteric modulators, signaling bias, oligomerization, constitutive signaling, and compartmentalized signaling. This review primarily focuses on the recent advances in oGPCR research on pain mechanisms, discussing the role of specific oGPCRs including GPR34, GPR37, GPR65, GPR83, GPR84, GPR85, GPR132, GPR151, GPR160, GPR171, GPR177, and GPR183. The orphan receptors among these receptors associated with central nervous system diseases are also briefly described. Understanding the functions of these oGPCRs can contribute not only to a deeper understanding of pain mechanisms but also offer a reference for discovering new targets for pain treatment.
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Affiliation(s)
- Chengfei Xu
- Department of Anesthesiology, The Third People's Hospital of Bengbu, Bengbu, 233000, PR China
| | - Yahui Wang
- Department of Anesthesiology, The First Affiliated Hospital of Bengbu Medical University, Bengbu, 233000, PR China
| | - Huadong Ni
- Department of Anesthesiology and Pain Research Center, Affiliated Hospital of Jiaxing University, Jiaxing, 314000, PR China
| | - Ming Yao
- Department of Anesthesiology and Pain Research Center, Affiliated Hospital of Jiaxing University, Jiaxing, 314000, PR China
| | - Liang Cheng
- Department of Anesthesiology, The Third People's Hospital of Bengbu, Bengbu, 233000, PR China
| | - Xuewu Lin
- Department of Anesthesiology, The First Affiliated Hospital of Bengbu Medical University, Bengbu, 233000, PR China
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4
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Majumdar S, Chiu YT, Pickett JE, Roth BL. Illuminating the understudied GPCR-ome. Drug Discov Today 2024; 29:103848. [PMID: 38052317 DOI: 10.1016/j.drudis.2023.103848] [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: 10/03/2023] [Revised: 11/17/2023] [Accepted: 11/28/2023] [Indexed: 12/07/2023]
Abstract
G-protein-coupled receptors (GPCRs) are the target of >30% of approved drugs. Despite their popularity, many of the >800 human GPCRs remain understudied. The Illuminating the Druggable Genome (IDG) project has generated many tools leading to important insights into the function and druggability of these so-called 'dark' receptors. These tools include assays, such as PRESTO-TANGO and TRUPATH, billions of small molecules made available via the ZINC virtual library, solved orphan GPCR structures, GPCR knock-in mice, and more. Together, these tools are illuminating the remaining 'dark' GPCRs.
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Affiliation(s)
- Sreeparna Majumdar
- Department of Pharmacology, UNC Chapel Hill School of Medicine, Chapel Hill, NC 27599, USA
| | - Yi-Ting Chiu
- Department of Pharmacology, UNC Chapel Hill School of Medicine, Chapel Hill, NC 27599, USA
| | - Julie E Pickett
- Department of Pharmacology, UNC Chapel Hill School of Medicine, Chapel Hill, NC 27599, USA
| | - Bryan L Roth
- Department of Pharmacology, UNC Chapel Hill School of Medicine, Chapel Hill, NC 27599, USA.
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Scharf MM, Humphrys LJ, Berndt S, Di Pizio A, Lehmann J, Liebscher I, Nicoli A, Niv MY, Peri L, Schihada H, Schulte G. The dark sides of the GPCR tree - research progress on understudied GPCRs. Br J Pharmacol 2024. [PMID: 38339984 DOI: 10.1111/bph.16325] [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: 08/25/2023] [Revised: 11/24/2023] [Accepted: 01/08/2024] [Indexed: 02/12/2024] Open
Abstract
A large portion of the human GPCRome is still in the dark and understudied, consisting even of entire subfamilies of GPCRs such as odorant receptors, class A and C orphans, adhesion GPCRs, Frizzleds and taste receptors. However, it is undeniable that these GPCRs bring an untapped therapeutic potential that should be explored further. Open questions on these GPCRs span diverse topics such as deorphanisation, the development of tool compounds and tools for studying these GPCRs, as well as understanding basic signalling mechanisms. This review gives an overview of the current state of knowledge for each of the diverse subfamilies of understudied receptors regarding their physiological relevance, molecular mechanisms, endogenous ligands and pharmacological tools. Furthermore, it identifies some of the largest knowledge gaps that should be addressed in the foreseeable future and lists some general strategies that might be helpful in this process.
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Affiliation(s)
- Magdalena M Scharf
- Karolinska Institutet, Dept. Physiology & Pharmacology, Sec. Receptor Biology & Signaling, Stockholm, Sweden
| | - Laura J Humphrys
- Institute of Pharmacy, University of Regensburg, Regensburg, Germany
| | - Sandra Berndt
- Rudolf Schönheimer Institute for Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
| | - Antonella Di Pizio
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Freising, Germany
- Chemoinformatics and Protein Modelling, Department of Molecular Life Science, School of Life Science, Technical University of Munich, Freising, Germany
| | - Juliane Lehmann
- Rudolf Schönheimer Institute for Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
| | - Ines Liebscher
- Rudolf Schönheimer Institute for Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
| | - Alessandro Nicoli
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Freising, Germany
- Chemoinformatics and Protein Modelling, Department of Molecular Life Science, School of Life Science, Technical University of Munich, Freising, Germany
| | - Masha Y Niv
- The Institute of Biochemistry, Food Science and Nutrition, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Lior Peri
- The Institute of Biochemistry, Food Science and Nutrition, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Hannes Schihada
- Institute of Pharmaceutical Chemistry, Philipps-University Marburg, Marburg, Germany
| | - Gunnar Schulte
- Karolinska Institutet, Dept. Physiology & Pharmacology, Sec. Receptor Biology & Signaling, Stockholm, Sweden
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Sun J, Tan Y, Su J, Mikhail H, Pavel V, Deng Z, Li Y. Role and molecular mechanism of ghrelin in degenerative musculoskeletal disorders. J Cell Mol Med 2023; 27:3681-3691. [PMID: 37661635 PMCID: PMC10718156 DOI: 10.1111/jcmm.17944] [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: 02/02/2023] [Revised: 07/19/2023] [Accepted: 08/24/2023] [Indexed: 09/05/2023] Open
Abstract
Ghrelin is a brain-gut peptide, and the first 28-peptide that was found in the gastric mucosa. It has a growth hormone (GH)-releasing hormone-like effect and can potently promote the release of GH from pituitary GH cells; however, it is unable to stimulate GH synthesis. Therefore, ghrelin is believed to play a role in promoting bone growth and development. The correlation between ghrelin and some degenerative diseases of the musculoskeletal system has been reported recently, and ghrelin may be one of the factors influencing degenerative pathologies, such as osteoporosis, osteoarthritis, sarcopenia and intervertebral disc degeneration. With population ageing, the risk of health problems caused by degenerative diseases of the musculoskeletal system gradually increases. In this article, the roles of ghrelin in musculoskeletal disorders are summarized to reveal the potential effects of ghrelin as a key target in the treatment of related bone and muscle diseases and the need for further research.
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Affiliation(s)
- Jianfeng Sun
- Deparment of OrthopedicsXiangya Hospital, Central South UniversityChangshaHunanChina
- Xiangya School of Medicine, Central South UniversityChangshaHunanChina
| | - Yibo Tan
- Deparment of OrthopedicsXiangya Hospital, Central South UniversityChangshaHunanChina
- Xiangya School of Medicine, Central South UniversityChangshaHunanChina
| | - Jingyue Su
- Department of Sports MedicineThe First Affiliated Hospital of Shenzhen University, Shenzhen Second People's HospitalShenzhenGuangdongChina
| | - Herasimenka Mikhail
- Republican Scientific and Practical Center of Traumatology and OrthopedicsMinskBelarus
| | - Volotovski Pavel
- Republican Scientific and Practical Center of Traumatology and OrthopedicsMinskBelarus
| | - Zhenhan Deng
- Department of Sports MedicineThe First Affiliated Hospital of Shenzhen University, Shenzhen Second People's HospitalShenzhenGuangdongChina
| | - Yusheng Li
- Deparment of OrthopedicsXiangya Hospital, Central South UniversityChangshaHunanChina
- National Clinical Research Center for Geriatric DisordersXiangya Hospital, Central South UniversityChangshaHunanChina
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7
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Kawasoe K, Watanabe T, Yoshida-Sakai N, Yamamoto Y, Kurahashi Y, Kidoguchi K, Ureshino H, Kamachi K, Fukuda-Kurahashi Y, Kimura S. A Combination of Alectinib and DNA-Demethylating Agents Synergistically Inhibits Anaplastic-Lymphoma-Kinase-Positive Anaplastic Large-Cell Lymphoma Cell Proliferation. Cancers (Basel) 2023; 15:5089. [PMID: 37894456 PMCID: PMC10605931 DOI: 10.3390/cancers15205089] [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: 05/01/2023] [Revised: 10/07/2023] [Accepted: 10/19/2023] [Indexed: 10/29/2023] Open
Abstract
The recent evolution of molecular targeted therapy has improved clinical outcomes in several human malignancies. The translocation of anaplastic lymphoma kinase (ALK) was originally identified in anaplastic large-cell lymphoma (ALCL) and subsequently in non-small cell lung carcinoma (NSCLC). Since ALK fusion gene products act as a driver of carcinogenesis in both ALCL and NSCLC, several ALK tyrosine kinase inhibitors (TKIs) have been developed. Crizotinib and alectinib are first- and second-generation ALK TKIs, respectively, approved for the treatment of ALK-positive ALCL (ALK+ ALCL) and ALK+ NSCLC. Although most ALK+ NSCLC patients respond to crizotinib and alectinib, they generally relapse after several years of treatment. We previously found that DNA-demethylating agents enhanced the efficacy of ABL TKIs in chronic myeloid leukemia cells. Moreover, aberrant DNA methylation has also been observed in ALCL cells. Thus, to improve the clinical outcomes of ALK+ ALCL therapy, we investigated the synergistic efficacy of the combination of alectinib and the DNA-demethylating agent azacytidine, decitabine, or OR-2100 (an orally bioavailable decitabine derivative). As expected, the combination of alectinib and DNA-demethylating agents synergistically suppressed ALK+ ALCL cell proliferation, concomitant with DNA hypomethylation and a reduction in STAT3 (a downstream target of ALK fusion proteins) phosphorylation. The combination of alectinib and OR-2100 markedly altered gene expression in ALCL cells, including that of genes implicated in apoptotic signaling, which possibly contributed to the synergistic anti-ALCL effects of this drug combination. Therefore, alectinib and OR-2100 combination therapy has the potential to improve the outcomes of patients with ALK+ ALCL.
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Affiliation(s)
- Kazunori Kawasoe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Tatsuro Watanabe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Nao Yoshida-Sakai
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Yuta Yamamoto
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Yuki Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- OHARA Pharmaceutical Co., Ltd., Koka 520-3403, Japan
| | - Keisuke Kidoguchi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Hiroshi Ureshino
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Kazuharu Kamachi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Yuki Fukuda-Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- OHARA Pharmaceutical Co., Ltd., Koka 520-3403, Japan
| | - Shinya Kimura
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
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8
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Mousavi S, Qiu H, Andrews MT, Checco JW. Peptidomic Analysis Reveals Seasonal Neuropeptide and Peptide Hormone Changes in the Hypothalamus and Pituitary of a Hibernating Mammal. ACS Chem Neurosci 2023; 14:2569-2581. [PMID: 37395621 PMCID: PMC10529138 DOI: 10.1021/acschemneuro.3c00268] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023] Open
Abstract
During the winter, hibernating mammals undergo extreme changes in physiology, which allow them to survive several months without access to food. These animals enter a state of torpor, which is characterized by decreased metabolism, near-freezing body temperatures, and a dramatically reduced heart rate. The neurochemical basis of this regulation is largely unknown. Based on prior evidence suggesting that the peptide-rich hypothalamus plays critical roles in hibernation, we hypothesized that changes in specific cell-cell signaling peptides (neuropeptides and peptide hormones) underlie physiological changes during torpor/arousal cycles. To test this hypothesis, we used a mass spectrometry-based peptidomics approach to examine seasonal changes of endogenous peptides that occur in the hypothalamus and pituitary of a model hibernating mammal, the thirteen-lined ground squirrel (Ictidomys tridecemlineatus). In the pituitary, we observed changes in several distinct peptide hormones as animals prepared for torpor in October, exited torpor in March, and progressed from spring (March) to fall (August). In the hypothalamus, we observed an overall increase in neuropeptides in October (pre-torpor), a decrease as the animal entered torpor, and an increase in a subset of neuropeptides during normothermic interbout arousals. Notable changes were observed for feeding regulatory peptides, opioid peptides, and several peptides without well-established functions. Overall, our study provides critical insight into changes in endogenous peptides in the hypothalamus and pituitary during mammalian hibernation that were not available from transcriptomic measurements. Understanding the molecular basis of the hibernation phenotype may pave the way for future efforts to employ hibernation-like strategies for organ preservation, combating obesity, and treatment of stroke.
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Affiliation(s)
- Somayeh Mousavi
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588, United States
| | - Haowen Qiu
- Center for Biotechnology, University of Nebraska-Lincoln, Lincoln, NE 68588, United States
- The Nebraska Center for Integrated Biomolecular Communication (NCIBC), University of Nebraska-Lincoln, Lincoln, NE 68588, United States
| | - Matthew T. Andrews
- School of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE 68583, United States
| | - James W. Checco
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588, United States
- The Nebraska Center for Integrated Biomolecular Communication (NCIBC), University of Nebraska-Lincoln, Lincoln, NE 68588, United States
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Willmore L, Minerva AR, Engelhard B, Murugan M, McMannon B, Oak N, Thiberge SY, Peña CJ, Witten IB. Overlapping representations of food and social stimuli in VTA dopamine neurons. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.17.541104. [PMID: 37293057 PMCID: PMC10245666 DOI: 10.1101/2023.05.17.541104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Dopamine neurons of the ventral tegmental area (VTA DA ) respond to food and social stimuli and contribute to both forms of motivation. However, it is unclear if the same or different VTA DA neurons encode these different stimuli. To address this question, we performed 2-photon calcium imaging in mice presented with food and conspecifics, and found statistically significant overlap in the populations responsive to both stimuli. Both hunger and opposite-sex social experience further increased the proportion of neurons that respond to both stimuli, implying that modifying motivation for one stimulus affects responses to both stimuli. In addition, single-nucleus RNA sequencing revealed significant co-expression of feeding- and social-hormone related genes in individual VTA DA neurons. Taken together, our functional and transcriptional data suggest overlapping VTA DA populations underlie food and social motivation.
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Affiliation(s)
- Lindsay Willmore
- Princeton Neuroscience Institute, Princeton University, Princeton NJ 08544 USA
| | - Adelaide R. Minerva
- Princeton Neuroscience Institute, Princeton University, Princeton NJ 08544 USA
| | - Ben Engelhard
- Princeton Neuroscience Institute, Princeton University, Princeton NJ 08544 USA
- Department of Medicine, Technion, Haifa, 3525433, Israel
| | - Malavika Murugan
- Princeton Neuroscience Institute, Princeton University, Princeton NJ 08544 USA
| | - Brenna McMannon
- Princeton Neuroscience Institute, Princeton University, Princeton NJ 08544 USA
| | - Nirja Oak
- Department of Medicine, Technion, Haifa, 3525433, Israel
| | - Stephan Y. Thiberge
- Princeton Neuroscience Institute, Princeton University, Princeton NJ 08544 USA
| | - Catherine J. Peña
- Princeton Neuroscience Institute, Princeton University, Princeton NJ 08544 USA
| | - Ilana B. Witten
- Princeton Neuroscience Institute, Princeton University, Princeton NJ 08544 USA
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10
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Baalmann F, Brendler J, Butthof A, Popkova Y, Engel KM, Schiller J, Winter K, Lede V, Ricken A, Schöneberg T, Schulz A. Reduced urine volume and changed renal sphingolipid metabolism in P2ry14-deficient mice. Front Cell Dev Biol 2023; 11:1128456. [PMID: 37250906 PMCID: PMC10213973 DOI: 10.3389/fcell.2023.1128456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 04/28/2023] [Indexed: 05/31/2023] Open
Abstract
The UDP-glucose receptor P2RY14, a rhodopsin-like G protein-coupled receptor (GPCR), was previously described as receptor expressed in A-intercalated cells of the mouse kidney. Additionally, we found P2RY14 is abundantly expressed in mouse renal collecting duct principal cells of the papilla and epithelial cells lining the renal papilla. To better understand its physiological function in kidney, we took advantage of a P2ry14 reporter and gene-deficient (KO) mouse strain. Morphometric studies showed that the receptor function contributes to kidney morphology. KO mice had a broader cortex relative to the total kidney area than wild-type (WT) mice. In contrast, the area of the outer stripe of the outer medulla was larger in WT compared to KO mice. Transcriptome comparison of the papilla region of WT and KO mice revealed differences in the gene expression of extracellular matrix proteins (e.g., decorin, fibulin-1, fibulin-7) and proteins involved in sphingolipid metabolism (e.g., small subunit b of the serine palmitoyltransferase) and other related GPCRs (e.g., GPR171). Using mass spectrometry, changes in the sphingolipid composition (e.g., chain length) were detected in the renal papilla of KO mice. At the functional level, we found that KO mice had a reduced urine volume but an unchanged glomerular filtration rate under normal chow and salt diets. Our study revealed P2ry14 as a functionally important GPCR in collecting duct principal cells and cells lining the renal papilla and the possible involvement of P2ry14 in nephroprotection by regulation of decorin.
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Affiliation(s)
- Fabian Baalmann
- Rudolf Schönheimer Institute of Biochemistry, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Jana Brendler
- Institute of Anatomy, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Anne Butthof
- Rudolf Schönheimer Institute of Biochemistry, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Yulia Popkova
- Institute of Medical Physics and Biophysics, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Kathrin M. Engel
- Institute of Medical Physics and Biophysics, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Jürgen Schiller
- Institute of Medical Physics and Biophysics, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Karsten Winter
- Institute of Anatomy, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Vera Lede
- Rudolf Schönheimer Institute of Biochemistry, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Albert Ricken
- Institute of Anatomy, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Torsten Schöneberg
- Rudolf Schönheimer Institute of Biochemistry, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Angela Schulz
- Rudolf Schönheimer Institute of Biochemistry, Faculty of Medicine, Leipzig University, Leipzig, Germany
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11
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Yussif BM, Blasing CV, Checco JW. Endogenous l- to d-amino acid residue isomerization modulates selectivity between distinct neuropeptide receptor family members. Proc Natl Acad Sci U S A 2023; 120:e2217604120. [PMID: 36877849 PMCID: PMC10089201 DOI: 10.1073/pnas.2217604120] [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: 10/14/2022] [Accepted: 02/03/2023] [Indexed: 03/08/2023] Open
Abstract
The l- to d-amino acid residue isomerization of neuropeptides is an understudied post-translational modification found in animals across several phyla. Despite its physiological importance, little information is available regarding the impact of endogenous peptide isomerization on receptor recognition and activation. As a result, the full roles peptide isomerization play in biology are not well understood. Here, we identify that the Aplysia allatotropin-related peptide (ATRP) signaling system utilizes l- to d-residue isomerization of one amino acid residue in the neuropeptide ligand to modulate selectivity between two distinct G protein-coupled receptors (GPCRs). We first identified a novel receptor for ATRP that is selective for the D2-ATRP form, which bears a single d-phenylalanine residue at position 2. Using cell-based receptor activation experiments, we then characterized the stereoselectivity of the two known ATRP receptors for both endogenous ATRP diastereomers, as well as for homologous toxin peptides from a carnivorous predator. We found that the ATRP system displayed dual signaling through both the Gαq and Gαs pathways, and each receptor was selectively activated by one naturally occurring ligand diastereomer over the other. Overall, our results provide insights into an unexplored mechanism by which nature regulates intercellular communication. Given the challenges in detecting l- to d-residue isomerization from complex mixtures de novo and in identifying receptors for novel neuropeptides, it is likely that other neuropeptide-receptor systems may also utilize changes in stereochemistry to modulate receptor selectivity in a manner similar to that discovered here.
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Affiliation(s)
- Baba M. Yussif
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE68588
| | - Cole V. Blasing
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE68588
| | - James W. Checco
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE68588
- The Nebraska Center for Integrated Biomolecular Communication, University of Nebraska-Lincoln, Lincoln, NE68588
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12
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McDermott MV, Ram A, Mattoon MT, Haderlie EE, Raddatz MC, Thomason MK, Bobeck EN. A small molecule ligand for the novel pain target, GPR171, produces minimal reward in mice. Pharmacol Biochem Behav 2023; 224:173543. [PMID: 36933620 DOI: 10.1016/j.pbb.2023.173543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 03/10/2023] [Accepted: 03/12/2023] [Indexed: 03/19/2023]
Abstract
ProSAAS is one of the most abundant proteins in the brain and is processed into several smaller peptides. One of which, BigLEN, is an endogenous ligand for the G protein-coupled receptor, GPR171. Recent work in rodent models has shown that a small-molecule ligand for GPR171, MS15203, increases morphine antinociception and is effective in lessening chronic pain. While these studies provide evidence for GPR171 as a possible pain target, its abuse liability has not yet been assessed and was evaluated in the current study. We first mapped the distribution of GPR171 and ProSAAS throughout the reward circuit of the brain using immunohistochemistry and showed that GPR171 and ProSAAS are localized in the hippocampus, basolateral amygdala, nucleus accumbens, prefrontal cortex. In the major dopaminergic structure, the ventral tegmental area (VTA), GPR171 appeared to be primarily localized in dopamine neurons while ProSAAS is outside of dopamine neurons. Next, MS15203 was administered to mice with or without morphine, and VTA slices were stained for the immediate early gene c-Fos as a marker of neuronal activation. Quantification of c-Fos-positive cells revealed no statistical difference between MS15203 and saline, suggesting that MS15203 does not increase VTA activation and dopamine release. The results of a conditioned place preference experiment showed that treatment with MS15203 produced no place preference indicating a lack of reward-related behavior. Taken together this data provides evidence that the novel pain therapeutic, MS15203, has minimal reward liability. Therefore, GPR171 deserves further exploration as a pain target. SIGNIFICANCE STATEMENT: MS15203, a drug that activates the receptor GPR171, was previously shown to increase morphine analgesia. The authors use in vivo and histological techniques to show that it fails to activate the rodent reward circuitry, providing support for the continued exploration of MS15203 as a novel pain drug, and GPR171 a novel pain target.
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Affiliation(s)
- Max V McDermott
- Dept. of Biology, Utah State University, 5305 Old Main Hill BNR117, Logan, UT 84322-5305, United States of America; Interdisciplinary Neuroscience Program, Utah State University, 5305 Old Main Hill BNR117, Logan, UT 84322-5305, United States of America
| | - Akila Ram
- Dept. of Biology, Utah State University, 5305 Old Main Hill BNR117, Logan, UT 84322-5305, United States of America
| | - Matthew T Mattoon
- Dept. of Biology, Utah State University, 5305 Old Main Hill BNR117, Logan, UT 84322-5305, United States of America
| | - Emmaline E Haderlie
- Dept. of Biology, Utah State University, 5305 Old Main Hill BNR117, Logan, UT 84322-5305, United States of America
| | - Megan C Raddatz
- Dept. of Biology, Utah State University, 5305 Old Main Hill BNR117, Logan, UT 84322-5305, United States of America; Interdisciplinary Neuroscience Program, Utah State University, 5305 Old Main Hill BNR117, Logan, UT 84322-5305, United States of America
| | - Madi K Thomason
- Dept. of Biology, Utah State University, 5305 Old Main Hill BNR117, Logan, UT 84322-5305, United States of America
| | - Erin N Bobeck
- Dept. of Biology, Utah State University, 5305 Old Main Hill BNR117, Logan, UT 84322-5305, United States of America; Interdisciplinary Neuroscience Program, Utah State University, 5305 Old Main Hill BNR117, Logan, UT 84322-5305, United States of America.
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13
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Franchini L, Orlandi C. Probing the orphan receptors: Tools and directions. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2023; 195:47-76. [PMID: 36707155 DOI: 10.1016/bs.pmbts.2022.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The endogenous ligands activating a large fraction of the G Protein Coupled Receptor (GPCR) family members have yet to be identified. These receptors are commonly labeled as orphans (oGPCRs), and because of the absence of available pharmacological tools they are currently understudied. Nonetheless, genome wide association studies, together with research using animal models identified many physiological functions regulated by oGPCRs. Similarly, mutations in some oGPCRs have been associated with rare genetic disorders or with an increased risk of developing pathologies. The once underestimated pharmacological potential of targeting oGPCRs is increasingly being exploited by the development of novel tools to understand their biology and by drug discovery endeavors aimed at identifying new modulators of their activity. Here, we summarize recent advancements in the field of oGPCRs and future directions.
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Affiliation(s)
- Luca Franchini
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, United States
| | - Cesare Orlandi
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, United States.
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14
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Chen Z, Wang D, Yu Q, Johnson J, Shipman R, Zhong X, Huang J, Yu Q, Zetterberg H, Asthana S, Carlsson C, Okonkwo O, Li L. In-Depth Site-Specific O-Glycosylation Analysis of Glycoproteins and Endogenous Peptides in Cerebrospinal Fluid (CSF) from Healthy Individuals, Mild Cognitive Impairment (MCI), and Alzheimer's Disease (AD) Patients. ACS Chem Biol 2022; 17:3059-3068. [PMID: 34964596 PMCID: PMC9240109 DOI: 10.1021/acschembio.1c00932] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Site-specific O-glycoproteome mapping in complex biological systems provides a molecular basis for understanding the structure-function relationships of glycoproteins and their roles in physiological and pathological processes. Previous O-glycoproteome analysis in cerebrospinal fluid (CSF) focused on sialylated glycoforms, while missing information on other glycosylation types. In order to achieve an unbiased O-glycosylation profile, we developed an integrated strategy combining universal boronic acid enrichment, high-pH fractionation, and electron-transfer and higher-energy collision dissociation (EThcD) for enhanced intact O-glycopeptide analysis. We applied this strategy to analyze the O-glycoproteome in CSF, resulting in the identification of 308 O-glycopeptides from 110 O-glycoproteins, covering both sialylated and nonsialylated glycoforms. To our knowledge, this is the largest data set of O-glycoproteins and O-glycosites reported for CSF to date. We also developed a peptidomics workflow that utilized the EThcD and a three-step database searching strategy for comprehensive PTM analysis of endogenous peptides, including N-glycosylation, O-glycosylation, and other common peptide PTMs. Interestingly, among the 1411 endogenous peptides identified, 89 were O-glycosylated, and only one N-glycosylated peptide was found, indicating that CSF endogenous peptides were predominantly O-glycosylated. Analyses of the O-glycoproteome and endogenous peptidome PTMs were also conducted in the CSF of MCI and AD patients to provide a landscape of glycosylation patterns in different disease states. Our results showed a decreasing trend in fucosylation and an increasing trend of endogenous peptide O-glycosylation, which may play an important role in AD progression.
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Affiliation(s)
- Zhengwei Chen
- Department of Chemistry, University of Wisconsin, Madison, WI 53706, USA
| | - Danqing Wang
- Department of Chemistry, University of Wisconsin, Madison, WI 53706, USA
| | - Qing Yu
- School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA
| | - Jillian Johnson
- School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA
| | - Richard Shipman
- Applied Science Program, University of Wisconsin-Stout, Menomonie, WI 54751, USA
| | - Xiaofang Zhong
- School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA
| | - Junfeng Huang
- School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA
| | - Qinying Yu
- School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA
| | - Henrik Zetterberg
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, 43180, Mölndal, Sweden,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, 43180, Mölndal, Sweden,Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, United Kingdom,UK Dementia Research Institute at UCL, London, WC1E 6BT, United Kingdom
| | - Sanjay Asthana
- School of Medicine and Public Health, University of Wisconsin, Madison, WI 53726, USA
| | - Cynthia Carlsson
- School of Medicine and Public Health, University of Wisconsin, Madison, WI 53726, USA
| | - Ozioma Okonkwo
- School of Medicine and Public Health, University of Wisconsin, Madison, WI 53726, USA
| | - Lingjun Li
- Department of Chemistry, University of Wisconsin, Madison, WI 53706, USA,School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA,Correspondence: Professor Lingjun Li, School of Pharmacy and Department of Chemistry, University of Wisconsin-Madison, 777 Highland Avenue, Madison, Wisconsin 53705-2222, , Fax: +1-608-262-5345, Phone: +1-608-265-8491
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15
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Afrose L, McDermott MV, Bhuiyan AI, Pathak SK, Bobeck EN. GPR171 activation regulates morphine tolerance but not withdrawal in a test-dependent manner in mice. Behav Pharmacol 2022; 33:442-451. [PMID: 35942845 PMCID: PMC9477863 DOI: 10.1097/fbp.0000000000000692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 07/07/2022] [Indexed: 11/26/2022]
Abstract
A newly deorphanized G protein-coupled receptor, GPR171, is found to be highly expressed within the periaqueductal gray, a pain-modulating region in the brain. Our recent research has shown that a GPR171 agonist increases morphine antinociception in male mice and opioid signaling in vitro . The objective of this study was to evaluate the effects of combination treatment in females as well as whether chronic treatment can be used without exacerbating morphine-induced tolerance and withdrawal in female and male mice. Our results demonstrate that activation of GPR171 with an agonist attenuates morphine tolerance in both female and male mice on the tail-flick test, but not the hotplate test. Importantly, the GPR171 agonist in combination with morphine does not exacerbate morphine-induced tolerance and withdrawal during long-term morphine treatment. Taken together, these data suggest that the GPR171 agonist may be combined with morphine to maintain antinociception while reducing the dose of morphine and therefore reducing side effects and abuse liability. The outcome of this study is clearly an important step toward understanding the functional interactions between opioid receptors and GPR171 and developing safer therapeutics for long-term pain management.
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Affiliation(s)
| | - Max V. McDermott
- Department of Biology
- Interdisciplinary Neuroscience Program, Utah State University, Logan, Utah
| | - Ashif I. Bhuiyan
- Chemistry and Biochemistry Department, Queens College of The City University of New York, Flushing, New York
- Chemistry Doctoral Program
| | - Sanjai K. Pathak
- Chemistry and Biochemistry Department, Queens College of The City University of New York, Flushing, New York
- Chemistry Doctoral Program
- Biochemistry Doctoral Program, The Graduate Center of The City University of New York, New York
| | - Erin N. Bobeck
- Department of Biology
- Interdisciplinary Neuroscience Program, Utah State University, Logan, Utah
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16
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Aryal DK, Rodriguiz RM, Nguyen NL, Pease MW, Morgan DJ, Pintar J, Fricker LD, Wetsel WC. Mice lacking proSAAS display alterations in emotion, consummatory behavior and circadian entrainment. GENES, BRAIN, AND BEHAVIOR 2022; 21:e12827. [PMID: 35878875 PMCID: PMC9444949 DOI: 10.1111/gbb.12827] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 07/07/2022] [Accepted: 07/07/2022] [Indexed: 11/30/2022]
Abstract
ProSAAS is a neuroendocrine protein that is cleaved by neuropeptide-processing enzymes into more than a dozen products including the bigLEN and PEN peptides, which bind and activate the receptors GPR171 and GPR83, respectively. Previous studies have suggested that proSAAS-derived peptides are involved in physiological functions that include body weight regulation, circadian rhythms and anxiety-like behavior. In the present study, we find that proSAAS knockout mice display robust anxiety-like behaviors in the open field, light-dark emergence and elevated zero maze tests. These mutant mice also show a reduction in cued fear and an impairment in fear-potentiated startle, indicating an important role for proSAAS-derived peptides in emotional behaviors. ProSAAS knockout mice exhibit reduced water consumption and urine production relative to wild-type controls. No differences in food consumption and overall energy expenditure were observed between the genotypes. However, the respiratory exchange ratio was elevated in the mutants during the light portion of the light-dark cycle, indicating decreased fat metabolism during this period. While proSAAS knockout mice show normal circadian patterns of activity, even upon long-term exposure to constant darkness, they were unable to shift their circadian clock upon exposure to a light pulse. Taken together, these results show that proSAAS-derived peptides modulate a wide range of behaviors including emotion, metabolism and the regulation of the circadian clock.
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Affiliation(s)
- Dipendra K. Aryal
- Department of Psychiatry and Behavioral SciencesDuke University Medical CenterDurhamNorth CarolinaUSA
| | - Ramona M. Rodriguiz
- Department of Psychiatry and Behavioral SciencesDuke University Medical CenterDurhamNorth CarolinaUSA,Department of Psychiatry and Behavioral Sciences, Mouse Behavioral and Neuroendocrine Analysis Core FacilityDuke University Medical CenterDurhamNorth CarolinaUSA
| | - Ngoc Lien Nguyen
- Department of Psychiatry and Behavioral SciencesDuke University Medical CenterDurhamNorth CarolinaUSA
| | - Matthew W. Pease
- Department of Psychiatry and Behavioral SciencesDuke University Medical CenterDurhamNorth CarolinaUSA
| | - Daniel J. Morgan
- Department of Anesthesiology and Perioperative Medicine, Pennsylvania StateUniversity College of MedicineHersheyPennsylvaniaUSA
| | - John Pintar
- Department of Neuroscience and Cell BiologyRutgers Robert Wood Johnson Medical SchoolPiscatawayNew JerseyUSA
| | - Lloyd D. Fricker
- Departments of Molecular Pharmacology and NeuroscienceAlbert Einstein College of MedicineBronxNew YorkUSA
| | - William C. Wetsel
- Department of Psychiatry and Behavioral Sciences, Mouse Behavioral and Neuroendocrine Analysis Core FacilityDuke University Medical CenterDurhamNorth CarolinaUSA,Department of Cell BiologyDuke University Medical CenterDurhamNorth CarolinaUSA,Department of NeurobiologyDuke University Medical CenterDurhamNCUSA
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17
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Xu NY, Liu ZY, Yang QM, Bian PP, Li M, Zhao X. Genomic Analyses for Selective Signatures and Genes Involved in Hot Adaptation Among Indigenous Chickens From Different Tropical Climate Regions. Front Genet 2022; 13:906447. [PMID: 35979430 PMCID: PMC9377314 DOI: 10.3389/fgene.2022.906447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 06/15/2022] [Indexed: 11/13/2022] Open
Abstract
Climate change, especially weather extremes like extreme cold or extreme hot, is a major challenge for global livestock. One of the animal breeding goals for sustainable livestock production should be to breed animals with excellent climate adaptability. Indigenous livestock and poultry are well adapted to the local climate, and they are good resources to study the genetic footprints and mechanism of the resilience to weather extremes. In order to identify selection signatures and genes that might be involved in hot adaptation in indigenous chickens from different tropical climates, we conducted a genomic analysis of 65 indigenous chickens that inhabit different climates. Several important unique positively selected genes (PSGs) were identified for each local chicken group by the cross-population extended haplotype homozygosity (XP-EHH). These PSGs, verified by composite likelihood ratio, genetic differentiation index, nucleotide diversity, Tajima’s D, and decorrelated composite of multiple signals, are related to nerve regulation, vascular function, immune function, lipid metabolism, kidney development, and function, which are involved in thermoregulation and hot adaptation. However, one common PSG was detected for all three tropical groups of chickens via XP-EHH but was not confirmed by other five types of selective sweep analyses. These results suggest that the hot adaptability of indigenous chickens from different tropical climate regions has evolved in parallel by taking different pathways with different sets of genes. The results from our study have provided reasonable explanations and insights for the rapid adaptation of chickens to diverse tropical climates and provide practical values for poultry breeding.
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Affiliation(s)
- Nai-Yi Xu
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Zhen-Yu Liu
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Qi-Meng Yang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Pei-Pei Bian
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Ming Li
- Department of Biology, University of Konstanz, Konstanz, Germany
| | - Xin Zhao
- Department of Animal Science, McGill University, Montreal, QC, Canada
- *Correspondence: Xin Zhao,
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18
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Chandra R, Aryal DK, Douros JD, Shahid R, Davis SJ, Campbell JE, Ilkayeya O, White PJ, Rodriguez R, Newgard CB, Wetsel WC, Liddle RA. Ildr1 gene deletion protects against diet-induced obesity and hyperglycemia. PLoS One 2022; 17:e0270329. [PMID: 35749484 PMCID: PMC9231709 DOI: 10.1371/journal.pone.0270329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 06/09/2022] [Indexed: 11/24/2022] Open
Abstract
Objective Immunoglobulin-like Domain-Containing Receptor 1 (ILDR1) is expressed on nutrient sensing cholecystokinin-positive enteroendocrine cells of the gastrointestinal tract and it has the unique ability to induce fat-mediated CCK secretion. However, the role of ILDR1 in CCK-mediated regulation of satiety is unknown. In this study, we examined the effects of ILDR1 on food intake and metabolic activity using mice with genetically-deleted Ildr1. Methods The expression of ILDR1 in murine tissues and the measurement of adipocyte cell size were evaluated by light and fluorescence confocal microscopy. The effects of Ildr1 deletion on mouse metabolism were quantitated using CLAMS chambers and by targeted metabolomics assays of multiple tissues. Hormone levels were measured by ELISA. The effects of Ildr1 gene deletion on glucose and insulin levels were determined using in vivo oral glucose tolerance, meal tolerance, and insulin tolerance tests, as well as ex vivo islet perifusion. Results ILDR1 is expressed in a wide range of tissues. Analysis of metabolic data revealed that although Ildr1-/- mice consumed more food than wild-type littermates, they gained less weight on a high fat diet and exhibited increased metabolic activity. Adipocytes in Ildr1-/- mice were significantly smaller than in wild-type mice fed either low or high fat diets. ILDR1 was expressed in both alpha and beta cells of pancreatic islets. Based on oral glucose and mixed meal tolerance tests, Ildr1-/- mice were more effective at lowering post-prandial glucose levels, had improved insulin sensitivity, and glucose-regulated insulin secretion was enhanced in mice lacking ILDR1. Conclusion Ildr1 loss significantly modified metabolic activity in these mutant mice. While Ildr1 gene deletion increased high fat food intake, it reduced weight gain and improved glucose tolerance. These findings indicate that ILDR1 modulates metabolic responses to feeding in mice.
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Affiliation(s)
- Rashmi Chandra
- Department of Medicine, Division of Gastroenterology, Duke University Medical Center, Durham, North Carolina, United States of America
- * E-mail: (RC); (RAL)
| | - Dipendra K. Aryal
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Jonathan D. Douros
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, United States of America
| | - Rafiq Shahid
- Department of Medicine, Division of Gastroenterology, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Supriya J. Davis
- Department of Medicine, Division of Gastroenterology, Duke University Medical Center, Durham, North Carolina, United States of America
- Swarthmore College, Swarthmore, Pennsylvania, United States of America
| | - Jonathan E. Campbell
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, United States of America
| | - Olga Ilkayeya
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, United States of America
- Sarah W. Stedman Nutrition and Metabolism Center, Duke University, Durham, North Carolina, United States of America
| | - Phillip J. White
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, United States of America
- Sarah W. Stedman Nutrition and Metabolism Center, Duke University, Durham, North Carolina, United States of America
| | - Ramona Rodriguez
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, North Carolina, United States of America
- Mouse Behavioral and Neuroendocrine Analysis Core Facility, Duke University, Durham, North Carolina, United States of America
| | - Christopher B. Newgard
- Duke Molecular Physiology Institute, Duke University, Durham, North Carolina, United States of America
- Sarah W. Stedman Nutrition and Metabolism Center, Duke University, Durham, North Carolina, United States of America
| | - William C. Wetsel
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, North Carolina, United States of America
- Mouse Behavioral and Neuroendocrine Analysis Core Facility, Duke University, Durham, North Carolina, United States of America
- Department of Cell Biology, Duke University Medical Center, Durham, North Carolina, United States of America
- Department of Neurobiology, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Rodger A. Liddle
- Department of Medicine, Division of Gastroenterology, Duke University Medical Center, Durham, North Carolina, United States of America
- Department of Veterans Affairs Medical Center, Durham, North Carolina, United States of America
- * E-mail: (RC); (RAL)
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19
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Mack SM, Gomes I, Fakira AK, Duarte ML, Gupta A, Fricker L, Devi LA. GPR83 engages endogenous peptides from two distinct precursors to elicit differential signaling. Mol Pharmacol 2022; 102:MOLPHARM-AR-2022-000487. [PMID: 35605991 PMCID: PMC9341263 DOI: 10.1124/molpharm.122.000487] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 04/28/2022] [Accepted: 05/03/2022] [Indexed: 09/11/2023] Open
Abstract
PEN is an abundant neuropeptide that activates GPR83, a G protein-coupled receptor that is considered a novel therapeutic target due to its roles in regulation of feeding, reward, and anxiety-related behaviors. The major form of PEN in the brain is 22 residues in length. Previous studies have identified shorter forms of PEN in mouse brain and neuroendocrine cells; these shorter forms were named PEN18, PEN19 and PEN20, with the number reflecting the length of the peptide. The C-terminal five residues of PEN20 are identical to the C-terminus of a procholecystokinin (proCCK)-derived peptide, named proCCK56-62, that is present in mouse brain. ProCCK56-62 is highly conserved across species although it has no homology to the bioactive cholecystokinin domain. ProCCK56-62 and a longer form, proCCK56-63 were tested for their ability to engage GPR83. Both peptides bind GPR83 with high affinity, activate second messenger pathways, and induce ligand-mediated receptor endocytosis. Interestingly, the shorter PEN peptides, ProCC56-62, and ProCCK56-63 differentially activate signal transduction pathways. Whereas PEN22 and PEN20 facilitate receptor coupling to Gai, PEN18, PEN19 and ProCCK peptides facilitate coupling to Gas. Furthermore, the ProCCK peptides exhibit dose dependent Ga subtype selectivity in that they faciliate coupling to Gas at low concentrations and Gai at high concentrations. These data demonstrate that peptides derived from two distinct peptide precursors can differentially activate GPR83, and that GPR83 exhibits Ga subtype preference depending on the nature and concentration of the peptide. These results are consistent with the emerging idea that endogenous neuropeptides function as biased ligands. Significance Statement We found that peptides derived from proCCK bind and activate GPR83, a G protein-coupled receptor that is known to bind peptides derived from proSAAS. Different forms of the proCCK- and proSAAS-derived peptides show biased agonism, activating Gas or Gai depending on the length of the peptide and/or its concentration.
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Affiliation(s)
- Seshat M Mack
- Department of Pharmacological Sciences, Mount Sinai School of Medicine, United States
| | - Ivone Gomes
- Department of Pharmacology & Systems Therapeutics, Mount Sinai School of Medicine, United States
| | - Amanda K Fakira
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, United States
| | - Mariana L Duarte
- Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, United States
| | - Achla Gupta
- Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, United States
| | - Lloyd Fricker
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, United States
| | - Lakshmi A Devi
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, United States
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20
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Wu Z, Wan J, Wang J, Meng X, Qian H. Identification of prognostic biomarkers for breast cancer brain metastases based on the bioinformatics analysis. Biochem Biophys Rep 2022; 29:101203. [PMID: 35059509 PMCID: PMC8760394 DOI: 10.1016/j.bbrep.2022.101203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 01/05/2022] [Accepted: 01/05/2022] [Indexed: 12/12/2022] Open
Abstract
Purpose The prognosis of breast cancer (BC) patients who develop into brain metastases (BMs) is very poor. Thus, it is of great significance to explore the etiology of BMs in BC and identify the key genes involved in this process to improve the survival of BC patients with BMs. Patients and methods The gene expression data and the clinical information of BC patients were downloaded from TCGA and GEO database. Differentially expressed genes (DEGs) in TCGA-BRCA and GSE12276 were overlapped to find differentially expressed metastatic genes (DEMGs). The protein-protein interaction (PPI) network of DEMGs was constructed via STRING database. ClusterProfiler R package was applied to perform the gene ontology (GO) enrichment analysis of DEMGs. The univariate Cox regression analysis and the Kaplan-Meier (K-M) curves were plotted to screen DEMGs associated with the overall survival and the metastatic recurrence survival, which were identified as the key genes associated with the BMs in BC. The immune infiltration and the expressions of immune checkpoints for BC patients with brain relapses and BC patients with other relapses were analyzed respectively. The correlations among the expressions of key genes and the differently infiltrated immune cells or the differentially expressed immune checkpoints were calculated. The gene set enrichment analysis (GSEA) of each key gene was conducted to investigate the potential mechanisms of key genes involved in BC patients with BMs. Moreover, CTD database was used to predict the drug-gene interaction network of key genes. Results A total of 154 DEGs were identified in BC patients at M0 and M1 in TCGA database. A total of 667 DEGs were identified in BC patients with brain relapses and with other relapses. By overlapping these DEGs, 17 DEMGs were identified, which were enriched in the cell proliferation related biological processes and the immune related molecular functions. The univariate Cox regression analysis and the Kaplan-Meier curves revealed that CXCL9 and GPR171 were closely associated with the overall survival and the metastatic recurrence survival and were identified as key genes associated with BMs in BC. The analyses of immune infiltration and immune checkpoint expressions showed that there was a significant difference of the immune microenvironment between brain relapses and other relapses in BC. GSEA indicated that CXCL9 and GPR171 may regulate BMs in BC via the immune-related pathways. Conclusion Our study identified the key genes associated with BMs in BC patients and explore the underlying mechanisms involved in the etiology of BMs in BC. These findings may provide a promising approach for the treatments of BC patients with BMs. CXCL9 and GPR171, as the key genes, were closely associated with the prognosis of brain metastases in breast cancer. There was a significant difference of the immune microenvironment between brain and other metastases in breast cancer. We revealed candidate drugs which associated with the key genes of breast cancer patients with brain metastases. A series of bioinformatic analysis methods were used in this article.
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Affiliation(s)
| | - Jinghai Wan
- Corresponding author. National Cancer Center/ National Clinical Research Center for Cancer/ Cancer Hospital, Neurosurgery, Panjiayuan 17#, Chaoyang District, Beijing, China.
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21
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Hunger dampens a nucleus accumbens circuit to drive persistent food seeking. Curr Biol 2022; 32:1689-1702.e4. [DOI: 10.1016/j.cub.2022.02.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 01/11/2022] [Accepted: 02/09/2022] [Indexed: 02/07/2023]
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22
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Fujiwara Y, Torphy RJ, Sun Y, Miller EN, Ho F, Borcherding N, Wu T, Torres RM, Zhang W, Schulick RD, Zhu Y. The GPR171 pathway suppresses T cell activation and limits antitumor immunity. Nat Commun 2021; 12:5857. [PMID: 34615877 PMCID: PMC8494883 DOI: 10.1038/s41467-021-26135-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 09/15/2021] [Indexed: 12/17/2022] Open
Abstract
The recently identified G-protein-coupled receptor GPR171 and its ligand BigLEN are thought to regulate food uptake and anxiety. Though GPR171 is commonly used as a T cell signature gene in transcriptomic studies, its potential role in T cell immunity has not been explored. Here we show that GPR171 is transcribed in T cells and its protein expression is induced upon antigen stimulation. The neuropeptide ligand BigLEN interacts with GPR171 to suppress T cell receptor-mediated signalling pathways and to inhibit T cell proliferation. Loss of GPR171 in T cells leads to hyperactivity to antigen stimulation and GPR171 knockout mice exhibit enhanced antitumor immunity. Blockade of GPR171 signalling by an antagonist promotes antitumor T cell immunity and improves immune checkpoint blockade therapies. Together, our study identifies the GPR171/BigLEN axis as a T cell checkpoint pathway that can be modulated for cancer immunotherapy.
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Affiliation(s)
- Yuki Fujiwara
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Robert J Torphy
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Yi Sun
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Emily N Miller
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Felix Ho
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Nicholas Borcherding
- Department of Pathology and Immunology, Washington University, St. Louis, MO, 63110, USA
| | - Tuoqi Wu
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Raul M Torres
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Weizhou Zhang
- Department of Pathology, University of Florida, Gainesville, FL, 32610, USA
| | - Richard D Schulick
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Yuwen Zhu
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA.
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23
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Ram A, Edwards T, McCarty A, Afrose L, McDermott MV, Bobeck EN. GPR171 Agonist Reduces Chronic Neuropathic and Inflammatory Pain in Male, But Not Female Mice. FRONTIERS IN PAIN RESEARCH 2021; 2:695396. [PMID: 35295419 PMCID: PMC8915562 DOI: 10.3389/fpain.2021.695396] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 08/17/2021] [Indexed: 12/22/2022] Open
Abstract
Chronic pain is a growing public health crisis that requires exigent and efficacious therapeutics. GPR171 is a promising therapeutic target that is widely expressed through the brain, including within the descending pain modulatory regions. Here, we explore the therapeutic potential of the GPR171 agonist, MS15203, in its ability to alleviate chronic pain in male and female mice using a once-daily systemic dose (10 mg/kg, i.p.) of MS15203 over the course of 5 days. We found that in our models of Complete Freund's Adjuvant (CFA)-induced inflammatory pain and chemotherapy-induced peripheral neuropathy (CIPN), MS15203 did not alleviate thermal hypersensitivity and allodynia, respectively, in female mice. On the other hand, MS15203 treatment decreased the duration of thermal hypersensitivity in CFA-treated male mice following 3 days of once-daily administration. MS15203 treatment also produced an improvement in allodynia in male mice, but not female mice, in neuropathic pain after 5 days of treatment. Gene expression of GPR171 and that of its endogenous ligand BigLEN, encoded by the gene PCSK1N, were unaltered within the periaqueductal gray (PAG) in both male and female mice following inflammatory and neuropathic pain. However, following neuropathic pain in male mice, the protein levels of GPR171 were decreased in the PAG. Treatment with MS15203 then rescued the protein levels of GPR171 in the PAG of these mice. Taken together, our results identify GPR171 as a GPCR that displays sexual dimorphism in alleviation of chronic pain. Further, our results suggest that GPR171 and MS15203 have demonstrable therapeutic potential in the treatment of chronic pain.
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Affiliation(s)
- Akila Ram
- Department of Biology, Utah State University, Logan, UT, United States
| | - Taylor Edwards
- Department of Biology, Utah State University, Logan, UT, United States
| | - Ashley McCarty
- Department of Biology, Utah State University, Logan, UT, United States
| | - Leela Afrose
- Department of Biology, Utah State University, Logan, UT, United States
| | - Max V. McDermott
- Department of Biology, Utah State University, Logan, UT, United States
- Interdisciplinary Neuroscience Program, Utah State University, Logan, UT, United States
| | - Erin N. Bobeck
- Department of Biology, Utah State University, Logan, UT, United States
- Interdisciplinary Neuroscience Program, Utah State University, Logan, UT, United States
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24
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Brenes AJ, Vandereyken M, James OJ, Watt H, Hukelmann J, Spinelli L, Dikovskaya D, Lamond AI, Swamy M. Tissue environment, not ontogeny, defines murine intestinal intraepithelial T lymphocytes. eLife 2021; 10:e70055. [PMID: 34473623 PMCID: PMC8463072 DOI: 10.7554/elife.70055] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 09/01/2021] [Indexed: 11/13/2022] Open
Abstract
Tissue-resident intestinal intraepithelial T lymphocytes (T-IEL) patrol the gut and have important roles in regulating intestinal homeostasis. T-IEL include both induced T-IEL, derived from systemic antigen-experienced lymphocytes, and natural T-IEL, which are developmentally targeted to the intestine. While the processes driving T-IEL development have been elucidated, the precise roles of the different subsets and the processes driving activation and regulation of these cells remain unclear. To gain functional insights into these enigmatic cells, we used high-resolution, quantitative mass spectrometry to compare the proteomes of induced T-IEL and natural T-IEL subsets, with naive CD8+ T cells from lymph nodes. This data exposes the dominant effect of the gut environment over ontogeny on T-IEL phenotypes. Analyses of protein copy numbers of >7000 proteins in T-IEL reveal skewing of the cell surface repertoire towards epithelial interactions and checkpoint receptors; strong suppression of the metabolic machinery indicating a high energy barrier to functional activation; upregulated cholesterol and lipid metabolic pathways, leading to high cholesterol levels in T-IEL; suppression of T cell antigen receptor signalling and expression of the transcription factor TOX, reminiscent of chronically activated T cells. These novel findings illustrate how T-IEL integrate multiple tissue-specific signals to maintain their homeostasis and potentially function.
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Affiliation(s)
- Alejandro J Brenes
- Centre for Gene Regulation and Expression, University of DundeeDundeeUnited Kingdom
- Division of Cell Signalling and Immunology, School of Life Sciences, University of DundeeDundeeUnited Kingdom
| | - Maud Vandereyken
- MRC Protein Phosphorylation and Ubiquitylation Unit, University of DundeeDundeeUnited Kingdom
| | - Olivia J James
- MRC Protein Phosphorylation and Ubiquitylation Unit, University of DundeeDundeeUnited Kingdom
| | - Harriet Watt
- MRC Protein Phosphorylation and Ubiquitylation Unit, University of DundeeDundeeUnited Kingdom
| | - Jens Hukelmann
- Centre for Gene Regulation and Expression, University of DundeeDundeeUnited Kingdom
| | - Laura Spinelli
- Division of Cell Signalling and Immunology, School of Life Sciences, University of DundeeDundeeUnited Kingdom
| | - Dina Dikovskaya
- MRC Protein Phosphorylation and Ubiquitylation Unit, University of DundeeDundeeUnited Kingdom
| | - Angus I Lamond
- Centre for Gene Regulation and Expression, University of DundeeDundeeUnited Kingdom
| | - Mahima Swamy
- Division of Cell Signalling and Immunology, School of Life Sciences, University of DundeeDundeeUnited Kingdom
- MRC Protein Phosphorylation and Ubiquitylation Unit, University of DundeeDundeeUnited Kingdom
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25
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Sharma S, Checco JW. Evaluating functional ligand-GPCR interactions in cell-based assays. Methods Cell Biol 2021; 166:15-42. [PMID: 34752330 DOI: 10.1016/bs.mcb.2021.06.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
G protein-coupled receptors (GPCRs) are a family of transmembrane proteins that act as major mediators of cellular signaling, and are the primary targets for a large portion of clinical therapeutics. Despite their critical role in biology and medicine, a large number of GPCRs are poorly understood, lacking validated ligands or potent synthetic modulators. Ligand-induced GPCR activation can be measured in cell-based assays to test hypotheses about ligand-receptor interactions or to evaluate efficacy of synthetic agonists or antagonists. However, the techniques necessary to develop and implement a cell-based assay to study a given receptor of interest are not commonplace in all laboratories. This chapter outlines methods to develop a cell-based assay to evaluate agonist-induced activation for a GPCR of interest, which can be useful to evaluate the effectiveness of predicted ligands. Examples of sample preparation protocols and data analysis are provided to help researchers from interdisciplinary fields, especially those in fields with relatively little molecular biology or cell culture experience.
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Affiliation(s)
- Sheryl Sharma
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - James W Checco
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, United States; The Nebraska Center for Integrated Biomolecular Communication (NCIBC), University of Nebraska-Lincoln, Lincoln, NE, United States.
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26
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Xhonneux LP, Knight O, Lernmark Å, Bonifacio E, Hagopian WA, Rewers MJ, She JX, Toppari J, Parikh H, Smith KGC, Ziegler AG, Akolkar B, Krischer JP, McKinney EF. Transcriptional networks in at-risk individuals identify signatures of type 1 diabetes progression. Sci Transl Med 2021; 13:eabd5666. [PMID: 33790023 PMCID: PMC8447843 DOI: 10.1126/scitranslmed.abd5666] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/24/2020] [Accepted: 03/12/2021] [Indexed: 12/11/2022]
Abstract
Type 1 diabetes (T1D) is a disease of insulin deficiency that results from autoimmune destruction of pancreatic islet β cells. The exact cause of T1D remains unknown, although asymptomatic islet autoimmunity lasting from weeks to years before diagnosis raises the possibility of intervention before the onset of clinical disease. The number, type, and titer of islet autoantibodies are associated with long-term disease risk but do not cause disease, and robust early predictors of individual progression to T1D onset remain elusive. The Environmental Determinants of Diabetes in the Young (TEDDY) consortium is a prospective cohort study aiming to determine genetic and environmental interactions causing T1D. Here, we analyzed longitudinal blood transcriptomes of 2013 samples from 400 individuals in the TEDDY study before both T1D and islet autoimmunity. We identified and interpreted age-associated gene expression changes in healthy infancy and age-independent changes tracking with progression to both T1D and islet autoimmunity, beginning before other evidence of islet autoimmunity was present. We combined multivariate longitudinal data in a Bayesian joint model to predict individual risk of T1D onset and validated the association of a natural killer cell signature with progression and the model's predictive performance on an additional 356 samples from 56 individuals in the independent Type 1 Diabetes Prediction and Prevention study. Together, our results indicate that T1D is characterized by early and longitudinal changes in gene expression, informing the immunopathology of disease progression and facilitating prediction of its course.
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Affiliation(s)
- Louis-Pascal Xhonneux
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, Cambridge CB2 0AW, UK
- Department of Medicine, University of Cambridge School of Clinical Medicine, Cambridge CB2 0QQ, UK
| | - Oliver Knight
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, Cambridge CB2 0AW, UK
- Department of Medicine, University of Cambridge School of Clinical Medicine, Cambridge CB2 0QQ, UK
| | - Åke Lernmark
- Department of Clinical Sciences, Lund University/CRC Skåne University Hospital Malmo, Jan Waldenströms gata 35, Malmö, Sweden
| | - Ezio Bonifacio
- Center for Regenerative Therapies, Technische Universität Dresden, Fetscherstraße 105, 01307, Dresden, Germany
| | - William A Hagopian
- Pacific Northwest Research Institute, 720 Broadway, Seattle, WA 98122, USA
| | - Marian J Rewers
- Barbara Davis Center for Childhood Diabetes, University of Colorado, 1775 Aurora Ct, Aurora, CO 80045, USA
| | - Jin-Xiong She
- Center for Biotechnology and Genomic Medicine, Medical College of Georgia, Augusta University, 1462 Laney Walker Blvd., Augusta, GA 30912, USA
| | - Jorma Toppari
- Department of Pediatrics, Turku University Hospital, Kiinamyllynkatu 4-8, 20521 Turku, Finland
- Institute of Biomedicine, Research Centre for Integrative Physiology and Pharmacology, University of Turku, FI-20014 Turun Lyliopisto, Finland
| | - Hemang Parikh
- Health Informatics Institute, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Kenneth G C Smith
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, Cambridge CB2 0AW, UK
- Department of Medicine, University of Cambridge School of Clinical Medicine, Cambridge CB2 0QQ, UK
| | - Anette-G Ziegler
- Institute of Diabetes Research, Helmholtz Zentrum München, and Klinikum rechts der Isar, Technische, Universität München, Forschergruppe Diabetes e.V., Arcisstraße 21, 80333 München, Germany
| | - Beena Akolkar
- National Institute of Diabetes and Digestive and Kidney Diseases, 9000 Rockville Pike Bethesda, MD 20892, USA
| | - Jeffrey P Krischer
- Health Informatics Institute, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Eoin F McKinney
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, Cambridge CB2 0AW, UK.
- Department of Medicine, University of Cambridge School of Clinical Medicine, Cambridge CB2 0QQ, UK
- Cambridge Centre for Artificial Intelligence in Medicine, University of Cambridge, Cambridge, UK
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27
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Ben-Shushan S, Miller Y. Neuropeptides: Roles and Activities as Metal Chelators in Neurodegenerative Diseases. J Phys Chem B 2021; 125:2796-2811. [PMID: 33570949 PMCID: PMC8389909 DOI: 10.1021/acs.jpcb.0c11151] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Neurodegenerative diseases, such as Alzheimer's disease (AD) and Parkinson's disease (PD), are characterized by deposits of amyloid proteins. The homeostasis of metal ions is crucial for the normal biological functions in the brain. However, in AD and PD, the imbalance of metal ions leads to formation of amyloid deposits. In the past four decades, there has been extensive effort to design compound agents than can chelate metal ions with the aim of preventing the formation of the amyloid deposits. Unfortunately, the compounds to date that were designed were not successful candidates to be used in clinical trials. Neuropeptides are small molecules that are produced and released by neurons. It has been shown that neuropeptides have neuroprotective effects in the brain and reduce the formation of amyloid deposits. This Review Article is focused on the function of neuropeptides as metal chelators. Experimental and computational studies demonstrated that neuropeptides could bind metal ions, such as Cu2+ and Zn2+. This Review Article provides perspectives and initiates future studies to investigate the role of neuropeptides as metal chelators in neurodegenerative diseases.
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Affiliation(s)
- Shira Ben-Shushan
- Department of Chemistry, Ben-Gurion University of the Negev, P.O. Box 653, Be'er Sheva 84105, Israel.,Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Be'er Sheva 84105, Israel
| | - Yifat Miller
- Department of Chemistry, Ben-Gurion University of the Negev, P.O. Box 653, Be'er Sheva 84105, Israel.,Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Be'er Sheva 84105, Israel
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28
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Cho PS, Lee HK, Choi YI, Choi SI, Lim JY, Kim M, Kim H, Jung SJ, Hwang SW. GPR171 Activation Modulates Nociceptor Functions, Alleviating Pathologic Pain. Biomedicines 2021; 9:biomedicines9030256. [PMID: 33807709 PMCID: PMC8001436 DOI: 10.3390/biomedicines9030256] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/20/2021] [Accepted: 02/21/2021] [Indexed: 01/04/2023] Open
Abstract
Modulation of the function of somatosensory neurons is an important analgesic strategy, requiring the proposal of novel molecular targets. Many G-protein-coupled receptors (GPRs) have been deorphanized, but the receptor locations, outcomes due to their activations, and their signal transductions remain to be elucidated, regarding the somatosensory nociceptor function. Here we report that GPR171, expressed in a nociceptor subpopulation, attenuated pain signals via Gi/o-coupled modulation of the activities of nociceptive ion channels when activated by its newly found ligands. Administration of its natural peptide ligand and a synthetic chemical ligand alleviated nociceptor-mediated acute pain aggravations and also relieved pathologic pain at nanomolar and micromolar ranges. This study suggests that functional alteration of the nociceptor neurons by GPR171 signaling results in pain alleviation and indicates that GPR171 is a promising molecular target for peripheral pain modulation.
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Affiliation(s)
- Pyung Sun Cho
- Department of Biomedical Sciences, College of Medicine, Korea University, Seoul 02841, Korea; (P.S.C.); (S.I.C.); (J.Y.L.); (M.K.)
- Department of Physiology, College of Medicine, Korea University, Seoul 02841, Korea
| | - Han Kyu Lee
- Department of Physiology, College of Medicine, Hanyang University, Seoul 04763, Korea; (H.K.L.); (Y.I.C.)
| | - Young In Choi
- Department of Physiology, College of Medicine, Hanyang University, Seoul 04763, Korea; (H.K.L.); (Y.I.C.)
| | - Seung In Choi
- Department of Biomedical Sciences, College of Medicine, Korea University, Seoul 02841, Korea; (P.S.C.); (S.I.C.); (J.Y.L.); (M.K.)
- Department of Physiology, College of Medicine, Korea University, Seoul 02841, Korea
| | - Ji Yeon Lim
- Department of Biomedical Sciences, College of Medicine, Korea University, Seoul 02841, Korea; (P.S.C.); (S.I.C.); (J.Y.L.); (M.K.)
- Department of Physiology, College of Medicine, Korea University, Seoul 02841, Korea
| | - Minseok Kim
- Department of Biomedical Sciences, College of Medicine, Korea University, Seoul 02841, Korea; (P.S.C.); (S.I.C.); (J.Y.L.); (M.K.)
- Department of Physiology, College of Medicine, Korea University, Seoul 02841, Korea
| | - Hyun Kim
- Department of Anatomy, College of Medicine, Korea University, Seoul 02841, Korea;
| | - Sung Jun Jung
- Department of Physiology, College of Medicine, Hanyang University, Seoul 04763, Korea; (H.K.L.); (Y.I.C.)
- Correspondence: (S.J.J.); (S.W.H.)
| | - Sun Wook Hwang
- Department of Biomedical Sciences, College of Medicine, Korea University, Seoul 02841, Korea; (P.S.C.); (S.I.C.); (J.Y.L.); (M.K.)
- Department of Physiology, College of Medicine, Korea University, Seoul 02841, Korea
- Correspondence: (S.J.J.); (S.W.H.)
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29
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Abid MSR, Mousavi S, Checco JW. Identifying Receptors for Neuropeptides and Peptide Hormones: Challenges and Recent Progress. ACS Chem Biol 2021; 16:251-263. [PMID: 33539706 DOI: 10.1021/acschembio.0c00950] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Intercellular signaling events mediated by neuropeptides and peptide hormones represent important targets for both basic science and drug discovery. For many bioactive peptides, the protein receptors that transmit information across the receiving cell membrane are not known, severely limiting these signaling pathways as potential therapeutic targets. Identifying the receptor(s) for a given peptide of interest is complicated by several factors. Most notably, cell-cell signaling peptides are generated through dynamic biosynthetic pathways, can act on many different families of receptor proteins, and can participate in complex ligand-receptor interactions that extend beyond a simple one-to-one archetype. Here, we discuss recent methodological advances to identify signaling partners for bioactive peptides. Recent efforts have centered on methods to identify candidate receptors via transcript expression, methods to match peptide-receptor pairs through high throughput screening, and methods to capture direct ligand-receptor interactions using chemical probes. Future applications of the receptor identification approaches discussed here, as well as technical advancements to address their limitations, promise to lead to a greater understanding of how cells communicate to deliver complex physiologies. Importantly, such advancements will likely provide novel targets for the treatment of human diseases within the central nervous and endocrine systems.
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Affiliation(s)
- Md Shadman Ridwan Abid
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - Somayeh Mousavi
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - James W. Checco
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
- The Nebraska Center for Integrated Biomolecular Communication (NCIBC), University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
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30
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Liu R, Wei P, Keller C, Orefice NS, Shi Y, Li Z, Huang J, Cui Y, Frost DC, Han S, Cross TWL, Rey FE, Li L. Integrated Label-Free and 10-Plex DiLeu Isobaric Tag Quantitative Methods for Profiling Changes in the Mouse Hypothalamic Neuropeptidome and Proteome: Assessment of the Impact of the Gut Microbiome. Anal Chem 2020; 92:14021-14030. [PMID: 32926775 DOI: 10.1021/acs.analchem.0c02939] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Gut microbiota can regulate host physiological and pathological status through gut-brain communications or pathways. However, the impact of the gut microbiome on neuropeptides and proteins involved in regulating brain functions and behaviors is still not clearly understood. To address the problem, integrated label-free and 10-plex DiLeu isobaric tag-based quantitative methods were implemented to compare the profiling of neuropeptides and proteins in the hypothalamus of germ-free (GF)- vs conventionally raised (ConvR)-mice. A total of 2943 endogenous peptides from 63 neuropeptide precursors and 3971 proteins in the mouse hypothalamus were identified. Among these 368 significantly changed peptides (fold changes over 1.5 and a p-value of <0.05), 73.6% of the peptides showed higher levels in GF-mice than in ConvR-mice, and 26.4% of the peptides had higher levels in ConvR-mice than in GF-mice. These peptides were mainly from secretogranin-2, phosphatidylethanolamine-binding protein-1, ProSAAS, and proenkephalin-A. A quantitative proteomic analysis employing DiLeu isobaric tags revealed that 282 proteins were significantly up- or down-regulated (fold changes over 1.2 and a p-value of <0.05) among the 3277 quantified proteins. These neuropeptides and proteins were mainly involved in regulating behaviors, transmitter release, signaling pathways, and synapses. Interestingly, pathways including long-term potentiation, long-term depression, and circadian entrainment were involved. In the present study, a combined label-free and 10-plex DiLeu-based quantitative method enabled a comprehensive profiling of gut microbiome-induced dynamic changes of neuropeptides and proteins in the hypothalamus, suggesting that the gut microbiome might mediate a range of behavioral changes, brain development, and learning and memory through these neuropeptides and proteins.
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Affiliation(s)
- Rui Liu
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States.,School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, P. R. China.,Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing 210023, P. R. China.,Jiangsu Key Laboratory of Research and Development in Marine Bio-resource Pharmaceutics, Nanjing University of Chinese Medicine, Nanjing 210023, P. R. China
| | - Pingli Wei
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Caitlin Keller
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Nicola Salvatore Orefice
- Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States.,Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Yatao Shi
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Zihui Li
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Junfeng Huang
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Yusi Cui
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Dustin C Frost
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Shuying Han
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States.,School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, P. R. China.,Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing 210023, P. R. China
| | - Tzu-Wen L Cross
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States.,Cardiovascular Research Center, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Federico E Rey
- Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Lingjun Li
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States.,Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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31
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Fricker LD, Margolis EB, Gomes I, Devi LA. Five Decades of Research on Opioid Peptides: Current Knowledge and Unanswered Questions. Mol Pharmacol 2020; 98:96-108. [PMID: 32487735 DOI: 10.1124/mol.120.119388] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 05/06/2020] [Indexed: 12/20/2022] Open
Abstract
In the mid-1970s, an intense race to identify endogenous substances that activated the same receptors as opiates resulted in the identification of the first endogenous opioid peptides. Since then, >20 peptides with opioid receptor activity have been discovered, all of which are generated from three precursors, proenkephalin, prodynorphin, and proopiomelanocortin, by sequential proteolytic processing by prohormone convertases and carboxypeptidase E. Each of these peptides binds to all three of the opioid receptor types (μ, δ, or κ), albeit with differing affinities. Peptides derived from proenkephalin and prodynorphin are broadly distributed in the brain, and mRNA encoding all three precursors are highly expressed in some peripheral tissues. Various approaches have been used to explore the functions of the opioid peptides in specific behaviors and brain circuits. These methods include directly administering the peptides ex vivo (i.e., to excised tissue) or in vivo (in animals), using antagonists of opioid receptors to infer endogenous peptide activity, and genetic knockout of opioid peptide precursors. Collectively, these studies add to our current understanding of the function of endogenous opioids, especially when similar results are found using different approaches. We briefly review the history of identification of opioid peptides, highlight the major findings, address several myths that are widely accepted but not supported by recent data, and discuss unanswered questions and future directions for research. SIGNIFICANCE STATEMENT: Activation of the opioid receptors by opiates and synthetic drugs leads to central and peripheral biological effects, including analgesia and respiratory depression, but these may not be the primary functions of the endogenous opioid peptides. Instead, the opioid peptides play complex and overlapping roles in a variety of systems, including reward pathways, and an important direction for research is the delineation of the role of individual peptides.
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Affiliation(s)
- Lloyd D Fricker
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, New York (L.D.F.); Department of Neurology, UCSF Weill Institute for Neurosciences, San Francisco, California (E.B.M.); and Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York (I.G., L.A.D.)
| | - Elyssa B Margolis
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, New York (L.D.F.); Department of Neurology, UCSF Weill Institute for Neurosciences, San Francisco, California (E.B.M.); and Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York (I.G., L.A.D.)
| | - Ivone Gomes
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, New York (L.D.F.); Department of Neurology, UCSF Weill Institute for Neurosciences, San Francisco, California (E.B.M.); and Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York (I.G., L.A.D.)
| | - Lakshmi A Devi
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, New York (L.D.F.); Department of Neurology, UCSF Weill Institute for Neurosciences, San Francisco, California (E.B.M.); and Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York (I.G., L.A.D.)
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32
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Su S, Raouf B, He X, Cai N, Li X, Yu J, Li J, Yu F, Wang M, Tang Y. Genome Wide Analysis for Growth at Two Growth Stages in A New Fast-Growing Common Carp Strain (Cyprinus carpio L.). Sci Rep 2020; 10:7259. [PMID: 32350307 PMCID: PMC7190712 DOI: 10.1038/s41598-020-64037-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 04/08/2020] [Indexed: 12/30/2022] Open
Abstract
In order to identify candidate genes or loci associated with growth performance of the newly established common carp strain, Xinlong, we conducted a genome-wide association analysis using 2b-RAD technology on 123 individuals. We constructed two sets of libraries associated with growth-related parameters (weight, length, width and depth) measured at two different grow-out stages. Among the 413,059 SNPs identified using SOAP SNP calling, 147,131 were tested for GWAS after quality filtering. Finally, 39 overlapping SNPs, assigned to four genomic locations, were associated with growth traits in two stages. These loci were assigned to functional classes related to immune response, response to stress, neurogenesis, cholesterol metabolism and development, and proliferation and differentiation of cells. By overlapping results of Plink and EMMAX analyses, we identified three genes: TOX, PLK2 and CD163 (both methods P < 0.05). Our study results could be used for marker-assisted selection to further improve the growth of the Xinlong strain, and illustrate that largely different sets of genes drive the growth of carp in the early and late grow-out stages.
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Affiliation(s)
- Shengyan Su
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture; Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, PR China. .,Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, 214081, PR China.
| | - Bouzoualegh Raouf
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture; Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, PR China.,Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, 214081, PR China
| | - Xinjin He
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture; Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, PR China.,College of Animal science, Shanxi Agricultural University, Taigu, PR China
| | - Nana Cai
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture; Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, PR China
| | - Xinyuan Li
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, 214081, PR China
| | - Juhua Yu
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, 214081, PR China
| | - JianLin Li
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, 214081, PR China
| | - Fan Yu
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, 214081, PR China
| | - Meiyao Wang
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, 214081, PR China
| | - Yongkai Tang
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture; Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, PR China. .,Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, 214081, PR China.
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33
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Hauser AS, Gloriam DE, Bräuner‐Osborne H, Foster SR. Novel approaches leading towards peptide GPCR de-orphanisation. Br J Pharmacol 2020; 177:961-968. [PMID: 31863461 PMCID: PMC7042120 DOI: 10.1111/bph.14950] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 11/12/2019] [Accepted: 11/19/2019] [Indexed: 12/12/2022] Open
Abstract
The discovery of novel ligands for orphan GPCRs has profoundly affected our understanding of human biology, opening new opportunities for research, and ultimately for therapeutic development. Accordingly, much effort has been directed towards the remaining orphan receptors, yet the rate of GPCR de-orphanisation has slowed in recent years. Here, we briefly review contemporary methodologies of de-orphanisation and then highlight our recent integrated computational and experimental approach for discovery of novel peptide ligands for orphan GPCRs. We identified putative endogenous peptide ligands and found peptide receptor sequence and structural characteristics present in selected orphan receptors. With comprehensive pharmacological screening using three complementary assays, we discovered novel pairings of 17 peptides with five different orphan GPCRs and revealed potential additional ligands for nine peptide GPCRs. These promising findings lay the foundation for future studies on these peptides and receptors to characterise their roles in human physiology and disease.
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Affiliation(s)
- Alexander S. Hauser
- Department of Drug Design and PharmacologyUniversity of CopenhagenCopenhagenDenmark
| | - David E. Gloriam
- Department of Drug Design and PharmacologyUniversity of CopenhagenCopenhagenDenmark
| | - Hans Bräuner‐Osborne
- Department of Drug Design and PharmacologyUniversity of CopenhagenCopenhagenDenmark
| | - Simon R. Foster
- Department of Drug Design and PharmacologyUniversity of CopenhagenCopenhagenDenmark
- Department of Biochemistry and Molecular Biology, Monash Biomedicine Discovery InstituteMonash UniversityClaytonVICAustralia
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McDermott MV, Afrose L, Gomes I, Devi LA, Bobeck EN. Opioid-Induced Signaling and Antinociception Are Modulated by the Recently Deorphanized Receptor, GPR171. J Pharmacol Exp Ther 2019; 371:56-62. [PMID: 31308196 DOI: 10.1124/jpet.119.259242] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 07/10/2019] [Indexed: 12/13/2022] Open
Abstract
ProSAAS is one of the most widely expressed proteins throughout the brain and was recently found to be upregulated in chronic fibromyalgia patients. BigLEN is a neuropeptide that is derived from ProSAAS and was recently discovered to be the endogenous ligand for the orphan G protein-coupled receptor GPR171. Although BigLEN-GPR171 has been found to play a role in feeding and anxiety behaviors, it has not yet been explored in pain and opioid modulation. The purpose of this study was to evaluate this novel neuropeptide-receptor system in opioid-induced antinociception. We found that GPR171 is expressed in GABAergic neurons within the periaqueductal gray, which is a key brain area involved in pain modulation and opioid functions. We also found that, although the GPR171 agonist and antagonist do not have nociceptive effects on their own, they oppositely regulate morphine-induced antinociception with the agonist enhancing and antagonist reducing antinociception. Lastly, we showed that the GPR171 antagonist or receptor knockdown decreases signaling by the mu-opioid receptor, but not the delta-opioid receptor. Taken together, these results suggest that antagonism of the GPR171 receptor reduces mu opioid receptor signaling and morphine-induced antinociception, whereas the GPR171 agonist enhances morphine antinociception, suggesting that GPR171 may be a novel target toward the development of pain therapeutics. SIGNIFICANCE STATEMENT: GPR171 is a recently deorphanized receptor that is expressed within the periaqueductal gray and can regulate mu opioid receptor signaling and antinociception. This research may contribute to the development of new therapeutics to treat pain.
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Affiliation(s)
- Max V McDermott
- Department of Biology, Utah State University, Logan, Utah (M.V.M., L.A., E.N.B.) and Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York (I.G., L.A.D.)
| | - Leela Afrose
- Department of Biology, Utah State University, Logan, Utah (M.V.M., L.A., E.N.B.) and Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York (I.G., L.A.D.)
| | - Ivone Gomes
- Department of Biology, Utah State University, Logan, Utah (M.V.M., L.A., E.N.B.) and Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York (I.G., L.A.D.)
| | - Lakshmi A Devi
- Department of Biology, Utah State University, Logan, Utah (M.V.M., L.A., E.N.B.) and Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York (I.G., L.A.D.)
| | - Erin N Bobeck
- Department of Biology, Utah State University, Logan, Utah (M.V.M., L.A., E.N.B.) and Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York (I.G., L.A.D.)
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35
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Mack SM, Gomes I, Devi LA. Neuropeptide PEN and Its Receptor GPR83: Distribution, Signaling, and Regulation. ACS Chem Neurosci 2019; 10:1884-1891. [PMID: 30726666 DOI: 10.1021/acschemneuro.8b00559] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Neuropeptides are chemical messengers that act to regulate a number of physiological processes, including feeding, reward, pain, and memory, among others. PEN is one of the most abundant hypothalamic neuropeptides; however, until recently, its target receptor remained unknown. In this Review, we summarize recent developments in research focusing on PEN and its receptor GPR83. We describe the studies leading to the deorphanization of GPR83 as the receptor for PEN. We also describe the signaling mediated by the PEN-GPR83 system, as well as the physiological roles in which PEN-GPR83 has been implicated. As studies have suggested a role for the PEN-GPR83 system in food intake and body weight regulation, as well as in drug addiction and reward disorders, a thorough understanding of this novel neuropeptide-receptor system will help identify novel therapeutic targets to treat pathophysiological conditions involving PEN-GPR83.
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Affiliation(s)
- Seshat M. Mack
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States
| | - Ivone Gomes
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States
| | - Lakshmi A. Devi
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States
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Abstract
The organs require oxygen and other types of nutrients (amino acids, sugars, and lipids) to function, the heart consuming large amounts of fatty acids for oxidation and adenosine triphosphate (ATP) generation.
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Lueptow LM, Devi LA, Fakira AK. Targeting the Recently Deorphanized Receptor GPR83 for the Treatment of Immunological, Neuroendocrine and Neuropsychiatric Disorders. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2018; 159:1-25. [PMID: 30340784 DOI: 10.1016/bs.pmbts.2018.07.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
G-protein coupled receptors (GPCRs) are a superfamily of receptors responsible for initiation of a myriad of intracellular signaling cascades. Currently, GPCRs represent approximately 34% of marketed pharmaceuticals, a large portion of which have no known endogenous ligand. These orphan GPCRs represent a large pool of novel targets for drug development. Very recently, the neuropeptide PEN, derived from the proteolytic processing of the precursor proSAAS, has been identified as a selective, high-affinity endogenous ligand for the orphan receptor, GPR83. GPR83 is highly expressed in the brain, spleen and thymus, indicating that this receptor may be a target to treat neurological and immune disorders. In the brain GPR83 is expressed in regions involved in the reward pathway, stress/anxiety responses, learning and memory and metabolism. However, the cell type specific expression of GPR83 in these regions has only recently begun to be characterized. In the immune system, GPR83 expression is regulated by Foxp3 in T-regulatory cells that are involved in autoimmune responses. Moreover, in the brain this receptor is regulated by interactions with other GPCRs, such as the recently deorphanized receptor, GPR171, and other hypothalamic receptors such as MC4R and GHSR. The following review will summarize the properties of GPR83 and highlight its known and potential significance in health and disease, as well as its promise as a novel target for drug development.
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Affiliation(s)
- Lindsay M Lueptow
- Department of Pharmacological Sciences, Freidman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Lakshmi A Devi
- Department of Pharmacological Sciences, Freidman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States.
| | - Amanda K Fakira
- Department of Pharmacological Sciences, Freidman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States
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38
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Large set data mining reveals overexpressed GPCRs in prostate and breast cancer: potential for active targeting with engineered anti-cancer nanomedicines. Oncotarget 2018; 9:24882-24897. [PMID: 29861840 PMCID: PMC5982759 DOI: 10.18632/oncotarget.25427] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 04/24/2018] [Indexed: 01/29/2023] Open
Abstract
Over 800 G-protein-coupled receptors (GPCRs) are encoded by the human genome and many are overexpressed in tumors. GPCRs are triggered by ligand molecules outside the cell and activate internal signal transduction pathways driving cellular responses. The receptor signals are desensitized by receptor internalization and this mechanism can be exploited for the specific delivery of ligand-linked drug molecules directly into cells. Detailed expression analysis in cancer tissue can inform the design of GPCR-ligand decorated drug carriers for active tumor cell targeting. The active targeting process utilizes ligand receptor interactions leading to binding and in most cases internalization of the ligand-attached drug carrier resulting in effective targeting of cancer cells. In this report public microarray data from the Gene Expression Omnibus (GEO) repository was used to identify overexpressed GPCRs in prostate and breast cancer tissues. The analyzed data confirmed previously known cancer receptor associations and identified novel candidates for potential active targeting. Prioritization of the identified targeting receptors is also presented based on high expression levels and frequencies in cancer samples but low expression in healthy tissue. Finally, some selected examples were used in ligand docking studies to assess the feasibility for chemical conjugation to drug nanocarriers without interference of receptor binding and activation. The presented data demonstrate a large untapped potential to improve efficacy and safety of current and future anti-cancer compounds through active targeting of GPCRs on cancer cells.
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Checco JW, Zhang G, Yuan WD, Yu K, Yin SY, Roberts-Galbraith RH, Yau PM, Romanova EV, Jing J, Sweedler JV. Molecular and Physiological Characterization of a Receptor for d-Amino Acid-Containing Neuropeptides. ACS Chem Biol 2018. [PMID: 29543428 PMCID: PMC5962930 DOI: 10.1021/acschembio.8b00167] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
![]()
Neuropeptides
in several animals undergo an unusual post-translational
modification, the isomerization of an amino acid residue from the l-stereoisomer to the d-stereoisomer. The resulting d-amino acid-containing peptide (DAACP) often displays biological
activity higher than that of its all-l-residue analogue,
with the d-residue being critical for function in many cases.
However, little is known about the full physiological roles played
by DAACPs, and few studies have examined the interaction of DAACPs
with their cognate receptors. Here, we characterized the signaling
of several DAACPs derived from a single neuropeptide prohormone, the Aplysia californica achatin-like neuropeptide precursor
(apALNP), at their putative receptor, the achatin-like neuropeptide
receptor (apALNR). We first used quantitative polymerase chain reaction
and in situ hybridization experiments to demonstrate
receptor (apALNR) expression throughout the central
nervous system; on the basis of the expression pattern, we identified
novel physiological functions that may be mediated by apALNR. To gain
insight into ligand signaling through apALNR, we created a library
of native and non-native neuropeptide analogues derived from apALNP
(the neuropeptide prohormone) and evaluated them for activity in cells
co-transfected with apALNR and the promiscuous Gα
subunit Gα-16. Several of these neuropeptide
analogues were also evaluated for their ability to induce circuit
activity in a well-defined neural network associated with feeding
behavior in intact ganglia from Aplysia. Our results
reveal the specificity of apALNR and provide strong evidence that
this receptor mediates diverse physiological functions throughout
the central nervous system. Finally, we show that some native apALNP-derived
DAACPs exhibit enhanced stability toward endogenous proteases, suggesting
that the d-residues in these DAACPs may increase the peptide
lifetime, in addition to influencing receptor specificity, in the
nervous system. Ultimately, these studies provide insight into signaling
at one of the few known DAACP-specific receptors and advance our understanding
of the roles that l- to d-residue isomerization
play in neuropeptide signaling.
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Affiliation(s)
- James W. Checco
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Guo Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, Collaborative Innovation Center of Chemistry for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, Advanced Institute for Life Sciences, School of Life Sciences, Nanjing University, Nanjing, China
| | - Wang-ding Yuan
- State Key Laboratory of Pharmaceutical Biotechnology, Collaborative Innovation Center of Chemistry for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, Advanced Institute for Life Sciences, School of Life Sciences, Nanjing University, Nanjing, China
| | - Ke Yu
- State Key Laboratory of Pharmaceutical Biotechnology, Collaborative Innovation Center of Chemistry for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, Advanced Institute for Life Sciences, School of Life Sciences, Nanjing University, Nanjing, China
| | - Si-yuan Yin
- State Key Laboratory of Pharmaceutical Biotechnology, Collaborative Innovation Center of Chemistry for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, Advanced Institute for Life Sciences, School of Life Sciences, Nanjing University, Nanjing, China
| | - Rachel H. Roberts-Galbraith
- Department of Cell and Developmental Biology, Howard Hughes Medical Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Peter M. Yau
- Roy J. Carver Biotechnology Center, Protein Sciences Facility, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Elena V. Romanova
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Jian Jing
- State Key Laboratory of Pharmaceutical Biotechnology, Collaborative Innovation Center of Chemistry for Life Sciences, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, Advanced Institute for Life Sciences, School of Life Sciences, Nanjing University, Nanjing, China
| | - Jonathan V. Sweedler
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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Abstract
Neuropeptides are the largest class of intercellular signaling molecules, contributing to a wide variety of physiological processes. Neuropeptide receptors are therapeutic targets for a broad range of drugs, including medications to treat pain, addiction, sleep disorders, and nausea. In addition to >100 peptides with known functions, many peptides have been identified in mammalian brain for which the cognate receptors have not been identified. Similarly, dozens of "orphan" G protein-coupled receptors have been identified in the mammalian genome. While it would seem straightforward to match the orphan peptides and receptors, this is not always easily accomplished. In this review we focus on peptides named PEN and big LEN, which are among the most abundant neuropeptides in mouse brain, and their recently identified receptors: GPR83 and GPR171. These receptors are co-expressed in some brain regions and are able to interact. Because PEN and big LEN are produced from the same precursor protein and co-secreted, the interaction of GPR83 and GPR171 is physiologically relevant. In addition to interactions of these two peptides/receptors, PEN and LEN are co-localized with neuropeptide Y and Agouti-related peptide in neurons that regulate feeding. In this review, using these peptide receptors as an example, we highlight the multiple modes of regulation of receptors and present the emerging view that neuropeptides function combinatorially to generate a network of signaling messages. The complexity of neuropeptides, receptors, and their signaling pathways is important to consider both in the initial deorphanization of peptides and receptors, and in the subsequent development of therapeutic applications.
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Affiliation(s)
- Lloyd D Fricker
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, New York, United States
| | - Lakshmi A Devi
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, United States.
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Ruiz-Larrañaga O, Langa J, Rendo F, Manzano C, Iriondo M, Estonba A. Genomic selection signatures in sheep from the Western Pyrenees. Genet Sel Evol 2018; 50:9. [PMID: 29566643 PMCID: PMC5865298 DOI: 10.1186/s12711-018-0378-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 02/12/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The current large spectrum of sheep phenotypic diversity results from the combined product of sheep selection for different production traits such as wool, milk and meat, and its natural adaptation to new environments. In this study, we scanned the genome of 25 Sasi Ardi and 75 Latxa sheep from the Western Pyrenees for three types of regions under selection: (1) regions underlying local adaptation of Sasi Ardi semi-feral sheep, (2) regions related to a long traditional dairy selection pressure in Latxa sheep, and (3) regions experiencing the specific effect of the modern genetic improvement program established for the Latxa breed during the last three decades. RESULTS Thirty-two selected candidate regions including 147 annotated genes were detected by using three statistical parameters: pooled heterozygosity H, Tajima's D, and Wright's fixation index Fst. For Sasi Ardi sheep, chromosomes Ovis aries (OAR)4, 6, and 22 showed the strongest signals and harbored several candidate genes related to energy metabolism and morphology (BBS9, ELOVL3 and LDB1), immunity (NFKB2), and reproduction (H2AFZ). The major genomic difference between Sasi Ardi and Latxa sheep was on OAR6, which is known to affect milk production, with highly selected regions around the ABCG2, SPP1, LAP3, NCAPG, LCORL, and MEPE genes in Latxa sheep. The effect of the modern genetic improvement program on Latxa sheep was also evident on OAR15, on which several olfactory genes are located. We also detected several genes involved in reproduction such as ESR1 and ZNF366 that were affected by this selection program. CONCLUSIONS Natural and artificial selection have shaped the genome of both Sasi Ardi and Latxa sheep. Our results suggest that Sasi Ardi traits related to energy metabolism, morphological, reproductive, and immunological features have been under positive selection to adapt this semi-feral sheep to its particular environment. The highly selected Latxa sheep for dairy production showed clear signatures of selection in genomic regions related to milk production. Furthermore, our data indicate that the selection criteria applied in the modern genetic improvement program affect immunity and reproduction traits.
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Affiliation(s)
- Otsanda Ruiz-Larrañaga
- Genetics, Physical Anthropology and Animal Physiology Department, University of the Basque Country (UPV/EHU), Leioa, Spain.
| | - Jorge Langa
- Genetics, Physical Anthropology and Animal Physiology Department, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Fernando Rendo
- Genetics, Sequencing and Genotyping Unit, Advanced Research Facilities (SGIker), University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Carmen Manzano
- Genetics, Physical Anthropology and Animal Physiology Department, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Mikel Iriondo
- Genetics, Physical Anthropology and Animal Physiology Department, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Andone Estonba
- Genetics, Physical Anthropology and Animal Physiology Department, University of the Basque Country (UPV/EHU), Leioa, Spain
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The G protein-coupled receptors deorphanization landscape. Biochem Pharmacol 2018; 153:62-74. [PMID: 29454621 DOI: 10.1016/j.bcp.2018.02.016] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 02/13/2018] [Indexed: 12/14/2022]
Abstract
G protein-coupled receptors (GPCRs) are usually highlighted as being both the largest family of membrane proteins and the most productive source of drug targets. However, most of the GPCRs are understudied and hence cannot be used immediately for innovative therapeutic strategies. Besides, there are still around 100 orphan receptors, with no described endogenous ligand and no clearly defined function. The race to discover new ligands for these elusive receptors seems to be less intense than before. Here, we present an update of the various strategies employed to assign a function to these receptors and to discover new ligands. We focus on the recent advances in the identification of endogenous ligands with a detailed description of newly deorphanized receptors. Replication being a key parameter in these endeavors, we also discuss the latest controversies about problematic ligand-receptor pairings. In this context, we propose several recommendations in order to strengthen the reporting of new ligand-receptor pairs.
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DeLaney K, Buchberger AR, Atkinson L, Gründer S, Mousley A, Li L. New techniques, applications and perspectives in neuropeptide research. ACTA ACUST UNITED AC 2018; 221:221/3/jeb151167. [PMID: 29439063 DOI: 10.1242/jeb.151167] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Neuropeptides are one of the most diverse classes of signaling molecules and have attracted great interest over the years owing to their roles in regulation of a wide range of physiological processes. However, there are unique challenges associated with neuropeptide studies stemming from the highly variable molecular sizes of the peptides, low in vivo concentrations, high degree of structural diversity and large number of isoforms. As a result, much effort has been focused on developing new techniques for studying neuropeptides, as well as novel applications directed towards learning more about these endogenous peptides. The areas of importance for neuropeptide studies include structure, localization within tissues, interaction with their receptors, including ion channels, and physiological function. Here, we discuss these aspects and the associated techniques, focusing on technologies that have demonstrated potential in advancing the field in recent years. Most identification and structural information has been gained by mass spectrometry, either alone or with confirmations from other techniques, such as nuclear magnetic resonance spectroscopy and other spectroscopic tools. While mass spectrometry and bioinformatic tools have proven to be the most powerful for large-scale analyses, they still rely heavily on complementary methods for confirmation. Localization within tissues, for example, can be probed by mass spectrometry imaging, immunohistochemistry and radioimmunoassays. Functional information has been gained primarily from behavioral studies coupled with tissue-specific assays, electrophysiology, mass spectrometry and optogenetic tools. Concerning the receptors for neuropeptides, the discovery of ion channels that are directly gated by neuropeptides opens up the possibility of developing a new generation of tools for neuroscience, which could be used to monitor neuropeptide release or to specifically change the membrane potential of neurons. It is expected that future neuropeptide research will involve the integration of complementary bioanalytical technologies and functional assays.
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Affiliation(s)
- Kellen DeLaney
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - Amanda R Buchberger
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - Louise Atkinson
- School of Biological Sciences, Institute for Global Food Security, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Stefan Gründer
- Institute of Physiology, RWTH Aachen University, Pauwelsstrasse 30, 52074 Aachen, Germany
| | - Angela Mousley
- School of Biological Sciences, Institute for Global Food Security, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Lingjun Li
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA .,School of Pharmacy, University of Wisconsin-Madison, 1450 Linden Drive, Madison, WI 53706, USA
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Bobeck EN, Gomes I, Pena D, Cummings KA, Clem RL, Mezei M, Devi LA. The BigLEN-GPR171 Peptide Receptor System Within the Basolateral Amygdala Regulates Anxiety-Like Behavior and Contextual Fear Conditioning. Neuropsychopharmacology 2017; 42:2527-2536. [PMID: 28425495 PMCID: PMC5686498 DOI: 10.1038/npp.2017.79] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 04/09/2017] [Accepted: 04/12/2017] [Indexed: 12/13/2022]
Abstract
Studies show that neuropeptide-receptor systems in the basolateral amygdala (BLA) play an important role in the pathology of anxiety and other mood disorders. Since GPR171, a recently deorphanized receptor for the abundant neuropeptide BigLEN, is expressed in the BLA, we investigated its role in fear and anxiety-like behaviors. To carry out these studies we identified small molecule ligands using a homology model of GPR171 to virtually screen a library of compounds. One of the hits, MS0021570_1, was identified as a GPR171 antagonist based on its ability to block (i) BigLEN-mediated activation of GPR171 in heterologous cells, (ii) BigLEN-mediated hyperpolarization of BLA pyramidal neurons, and (iii) feeding induced by DREADD-mediated activation of BigLEN containing AgRP neurons in the arcuate nucleus. The role of GPR171 in anxiety-like behavior or fear conditioning was evaluated following systemic or intra-BLA administration of MS0021570_1, as well as following lentiviral-mediated knockdown of GPR171 in the BLA. We find that systemic administration of MS0021570_1 attenuates anxiety-like behavior while intra-BLA administration or knockdown of GPR171 in the BLA reduces anxiety-like behavior and fear conditioning. These results indicate that the BigLEN-GPR171 system plays an important role in these behaviors and could be a novel target to develop therapeutics to treat psychiatric disorders.
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Affiliation(s)
- Erin N Bobeck
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA,Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, One Gustave L Levy Place, Annenberg 19-84, New York, NY 10029, USA. Tel: +1 212 2418345, Fax: +1 212 9967214, E-mail: or
| | - Ivone Gomes
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Darlene Pena
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
| | - Kirstie A Cummings
- Fishberg Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Roger L Clem
- Fishberg Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Mihaly Mezei
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Lakshmi A Devi
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA,Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, One Gustave L Levy Place, Annenberg 19-84, New York, NY 10029, USA. Tel: +1 212 2418345, Fax: +1 212 9967214, E-mail: or
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45
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Fricker LD. Carboxypeptidase E and the Identification of Novel Neuropeptides as Potential Therapeutic Targets. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2017; 82:85-102. [PMID: 29413529 DOI: 10.1016/bs.apha.2017.09.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Peptides and small molecules that bind to peptide receptors are important classes of drugs that are used for a wide variety of different applications. The search for novel neuropeptides traditionally involved a time-consuming approach to purify each peptide to homogeneity and determine its amino acid sequence. The discovery in the 1980s of enkephalin convertase/carboxypeptidase E (CPE), and the observation that this enzyme was involved in the production of nearly every known neuropeptide led to the idea for a one-step affinity purification of CPE substrates. This approach was successfully used to isolate hundreds of known neuropeptides in mouse brain, as well as over a dozen novel peptides. Some of the novel peptides found using this approach are among the most abundant peptides present in brain, but had not been previously identified by traditional approaches. Recently, receptors for two of the novel peptides have been identified, confirming their role as neuropeptides that function in cell-cell signaling. Small molecules that bind to one of these receptors have been developed and found to significantly reduce food intake and anxiety-like behavior in an animal model. This review describes the entire project, from discovery of CPE to the novel peptides and their receptors.
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Affiliation(s)
- Lloyd D Fricker
- Albert Einstein College of Medicine, Bronx, NY, United States.
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Berezniuk I, Rodriguiz RM, Zee ML, Marcus DJ, Pintar J, Morgan DJ, Wetsel WC, Fricker LD. ProSAAS-derived peptides are regulated by cocaine and are required for sensitization to the locomotor effects of cocaine. J Neurochem 2017; 143:268-281. [PMID: 28881029 DOI: 10.1111/jnc.14209] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 08/08/2017] [Accepted: 08/21/2017] [Indexed: 12/11/2022]
Abstract
To identify neuropeptides that are regulated by cocaine, we used a quantitative peptidomic technique to examine the relative levels of neuropeptides in several regions of mouse brain following daily intraperitoneal administration of 10 mg/kg cocaine or saline for 7 days. A total of 102 distinct peptides were identified in one or more of the following brain regions: nucleus accumbens, caudate putamen, frontal cortex, and ventral tegmental area. None of the peptides detected in the caudate putamen or frontal cortex were altered by cocaine administration. Three peptides in the nucleus accumbens and seven peptides in the ventral tegmental area were significantly decreased in cocaine-treated mice. Five of these ten peptides are derived from proSAAS, a secretory pathway protein and neuropeptide precursor. To investigate whether proSAAS peptides contribute to the physiological effects of psychostimulants, we examined acute responses to cocaine and amphetamine in the open field with wild-type (WT) and proSAAS knockout (KO) mice. Locomotion was stimulated more robustly in the WT compared to mutant mice for both psychostimulants. Behavioral sensitization to amphetamine was not maintained in proSAAS KO mice and these mutants failed to sensitize to cocaine. To determine whether the rewarding effects of cocaine were altered, mice were tested in conditioned place preference (CPP). Both WT and proSAAS KO mice showed dose-dependent CPP to cocaine that was not distinguished by genotype. Taken together, these results suggest that proSAAS-derived peptides contribute differentially to the behavioral sensitization to psychostimulants, while the rewarding effects of cocaine appear intact in mice lacking proSAAS.
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Affiliation(s)
- Iryna Berezniuk
- Department of Neuroscience, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Ramona M Rodriguiz
- Department of Psychiatry and Behavioral Sciences, Mouse Behavioral and Neuroendocrine Analysis Core Facility, Duke University Medical Center, Durham, North Carolina, USA
| | - Michael L Zee
- Department of Anesthesiology and Perioperative Medicine, Penn State University College of Medicine, Hershey, Pennsylvania, USA
| | - David J Marcus
- Department of Anesthesiology and Perioperative Medicine, Penn State University College of Medicine, Hershey, Pennsylvania, USA
| | - John Pintar
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey, USA
| | - Daniel J Morgan
- Department of Anesthesiology and Perioperative Medicine, Penn State University College of Medicine, Hershey, Pennsylvania, USA
| | - William C Wetsel
- Department of Psychiatry and Behavioral Sciences, Mouse Behavioral and Neuroendocrine Analysis Core Facility, Duke University Medical Center, Durham, North Carolina, USA.,Departments of Neurobiology and Cell Biology, Duke University Medical Center, Durham, North Carolina, USA
| | - Lloyd D Fricker
- Department of Neuroscience, Albert Einstein College of Medicine, Bronx, New York, USA.,Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, New York, USA
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Yu Q, Canales A, Glover MS, Das R, Shi X, Liu Y, Keller MP, Attie AD, Li L. Targeted Mass Spectrometry Approach Enabled Discovery of O-Glycosylated Insulin and Related Signaling Peptides in Mouse and Human Pancreatic Islets. Anal Chem 2017; 89:9184-9191. [PMID: 28726377 PMCID: PMC6314835 DOI: 10.1021/acs.analchem.7b01926] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
O-Linked glycosylation often involves the covalent attachment of sugar moieties to the hydroxyl group of serine or threonine on proteins/peptides. Despite growing interest in glycoproteins, little attention has been directed to glycosylated signaling peptides, largely due to lack of enabling analytical tools. Here we explore the occurrence of naturally O-linked glycosylation on the signaling peptides extracted from mouse and human pancreatic islets using mass spectrometry (MS). A novel targeted MS-based method is developed to increase the likelihood of capturing these modified signaling peptides and to provide improved sequence coverage and accurate glycosite localization, enabling the first large-scale discovery of O-glycosylation on signaling peptides. Several glycosylated signaling peptides with multiple glycoforms are identified, including the first report of glycosylated insulin-B chain and insulin-C peptide and BigLEN. This discovery may reveal potential novel functions as glycosylation could influence their conformation and biostability. Given the importance of insulin and its related peptide hormones and previous studies of glycosylated insulin analogues, this natural glycosylation may provide important insights into diabetes research and therapeutic treatments.
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Affiliation(s)
- Qing Yu
- School of Pharmacy, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - Alejandra Canales
- Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Matthew S. Glover
- School of Pharmacy, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - Rahul Das
- Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Xudong Shi
- Department of Surgery, Wisconsin Institute for Medical Research, Madison, Wisconsin 53705, United States
| | - Yang Liu
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Mark P. Keller
- Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Alan D. Attie
- Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Lingjun Li
- School of Pharmacy, University of Wisconsin, Madison, Wisconsin 53705, United States
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
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48
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Ye H, Wang J, Tian Z, Ma F, Dowell J, Bremer Q, Lu G, Baldo B, Li L. Quantitative Mass Spectrometry Reveals Food Intake-Induced Neuropeptide Level Changes in Rat Brain: Functional Assessment of Selected Neuropeptides as Feeding Regulators. Mol Cell Proteomics 2017; 16:1922-1937. [PMID: 28864778 DOI: 10.1074/mcp.ra117.000057] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Indexed: 12/27/2022] Open
Abstract
Endogenous neuropeptides are important signaling molecules that function as regulators of food intake and body weight. Previous work has shown that neuropeptide gene expression levels in a forebrain reward site, the nucleus accumbens (NAc), were changed by feeding. To directly monitor feeding-induced changes in neuropeptide expression levels within the NAc, we employed a combination of cryostat dissection, heat stabilization, neuropeptide extraction and label-free quantitative neuropeptidomics via a liquid chromatography-high resolution mass spectrometry platform. Using this methodology, we described the first neuropeptidome in NAc and discovered that feeding caused the expression level changes of multiple neuropeptides derived from different precursors, especially proSAAS-derived peptides such as Big LEN, PEN and little SAAS. We further investigated the regulatory functions of these neuropeptides derived from the ProSAAS family by performing an intra-NAc microinjection experiment using the identified ProSAAS neuropeptides, 'Big-LEN' and 'PEN'. Big LEN significantly increased rats' food and water intake, whereas both big LEN and PEN affected other behaviors including locomotion, drinking and grooming. In addition, we quantified the feeding-induced changes of peptides from hippocampus, hypothalamus and striatum to reveal the neuropeptide interplay among different anatomical regions. In summary, our study demonstrated neuropeptidomic changes in response to food intake in the rat NAc and other key brain regions. Importantly, the microinfusion of ProSAAS peptides into NAc revealed that they are behaviorally active in this brain site, suggesting the potential use of these peptides as therapeutics for eating disorders.
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Affiliation(s)
- Hui Ye
- From the ‡State Key Laboratory of Natural Medicines, Key Lab of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Tongjiaxiang #24, Nanjing 21009, China.,§School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, Wisconsin 53705
| | - Jingxin Wang
- ¶Neuroscience Training Program, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, Wisconsin 53705
| | - Zichuan Tian
- ‖Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706
| | - Fengfei Ma
- §School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, Wisconsin 53705
| | - James Dowell
- §School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, Wisconsin 53705
| | - Quentin Bremer
- **Department of Psychiatry, University of Wisconsin-Madison, 6001 Research Park Boulevard, Madison, Wisconsin 53719
| | - Gaoyuan Lu
- From the ‡State Key Laboratory of Natural Medicines, Key Lab of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Tongjiaxiang #24, Nanjing 21009, China
| | - Brian Baldo
- ¶Neuroscience Training Program, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, Wisconsin 53705; .,**Department of Psychiatry, University of Wisconsin-Madison, 6001 Research Park Boulevard, Madison, Wisconsin 53719
| | - Lingjun Li
- §School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, Wisconsin 53705; .,¶Neuroscience Training Program, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, Wisconsin 53705.,‖Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706.,‡‡School of Life Sciences, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
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49
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Le Duc D, Schulz A, Lede V, Schulze A, Thor D, Brüser A, Schöneberg T. P2Y Receptors in Immune Response and Inflammation. Adv Immunol 2017; 136:85-121. [PMID: 28950952 DOI: 10.1016/bs.ai.2017.05.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Metabotropic pyrimidine and purine nucleotide receptors (P2Y receptors) are expressed in virtually all cells with implications in very diverse biological functions, including the well-established platelet aggregation (P2Y12), but also immune regulation and inflammation. The classical P2Y receptors bind nucleotides and are encoded by eight genes with limited sequence homology, while phylogenetically related receptors (e.g., P2Y12-like) recognize lipids and peptides, but also nucleotide derivatives. Growing lines of evidence suggest an important function of P2Y receptors in immune cell differentiation and maturation, migration, and cell apoptosis. Here, we give a perspective on the P2Y receptors' molecular structure and physiological importance in immune cells, as well as the related diseases and P2Y-targeting therapies. Extensive research is being undertaken to find modulators of P2Y receptors and uncover their physiological roles. We anticipate the medical applications of P2Y modulators and their immune relevance.
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Affiliation(s)
- Diana Le Duc
- Rudolf Schönheimer Institute of Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
| | - Angela Schulz
- Rudolf Schönheimer Institute of Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
| | - Vera Lede
- Rudolf Schönheimer Institute of Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
| | - Annelie Schulze
- Rudolf Schönheimer Institute of Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
| | - Doreen Thor
- Rudolf Schönheimer Institute of Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
| | - Antje Brüser
- Rudolf Schönheimer Institute of Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
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Khan MZ, He L. Neuro-psychopharmacological perspective of Orphan receptors of Rhodopsin (class A) family of G protein-coupled receptors. Psychopharmacology (Berl) 2017; 234:1181-1207. [PMID: 28289782 DOI: 10.1007/s00213-017-4586-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 02/27/2017] [Indexed: 12/28/2022]
Abstract
BACKGROUND In the central nervous system (CNS), G protein-coupled receptors (GPCRs) are the most fruitful targets for neuropsychopharmacological drug development. Rhodopsin (class A) is the most studied class of GPCR and includes orphan receptors for which the endogenous ligand is not known or is unclear. Characterization of orphan GPCRs has proven to be challenging, and the production pace of GPCR-based drugs has been incredibly slow. OBJECTIVE Determination of the functions of these receptors may provide unexpected insight into physiological and neuropathological processes. Advances in various methods and techniques to investigate orphan receptors including in situ hybridization and knockdown/knockout (KD/KO) showed extensive expression of these receptors in the mammalian brain and unmasked their physiological and neuropathological roles. Due to these rapid progress and development, orphan GPCRs are rising as a new and promising class of drug targets for neurodegenerative diseases and psychiatric disorders. CONCLUSION This review presents a neuropsychopharmacological perspective of 26 orphan receptors of rhodopsin (class A) family, namely GPR3, GPR6, GPR12, GPR17, GPR26, GPR35, GPR39, GPR48, GPR49, GPR50, GPR52, GPR55, GPR61, GPR62, GPR63, GPR68, GPR75, GPR78, GPR83, GPR84, GPR85, GPR88, GPR153, GPR162, GPR171, and TAAR6. We discussed the expression of these receptors in mammalian brain and their physiological roles. Furthermore, we have briefly highlighted their roles in neurodegenerative diseases and psychiatric disorders including Alzheimer's disease, Parkinson's disease, neuroinflammation, inflammatory pain, bipolar and schizophrenic disorders, epilepsy, anxiety, and depression.
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Affiliation(s)
- Muhammad Zahid Khan
- Department of Pharmacology, China Pharmaceutical University, No. 24 Tong Jia Xiang, Nanjing, Jiangsu Province, 210009, China.
| | - Ling He
- Department of Pharmacology, China Pharmaceutical University, No. 24 Tong Jia Xiang, Nanjing, Jiangsu Province, 210009, China
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