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Anversa RG, Maddern XJ, Lawrence AJ, Walker LC. Orphan peptide and G protein-coupled receptor signalling in alcohol use disorder. Br J Pharmacol 2024; 181:595-609. [PMID: 38073127 PMCID: PMC10953447 DOI: 10.1111/bph.16301] [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: 10/14/2023] [Revised: 11/22/2023] [Accepted: 11/28/2023] [Indexed: 01/10/2024] Open
Abstract
Neuropeptides and G protein-coupled receptors (GPCRs) have long been, and continue to be, one of the most popular target classes for drug discovery in CNS disorders, including alcohol use disorder (AUD). Yet, orphaned neuropeptide systems and receptors (oGPCR), which have no known cognate receptor or ligand, remain understudied in drug discovery and development. Orphan neuropeptides and oGPCRs are abundantly expressed within the brain and represent an unprecedented opportunity to address brain function and may hold potential as novel treatments for disease. Here, we describe the current literature regarding orphaned neuropeptides and oGPCRs implicated in AUD. Specifically, in this review, we focus on the orphaned neuropeptide cocaine- and amphetamine-regulated transcript (CART), and several oGPCRs that have been directly implicated in AUD (GPR6, GPR26, GPR88, GPR139, GPR158) and discuss their potential and pitfalls as novel treatments, and progress in identifying their cognate receptors or ligands.
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Affiliation(s)
- Roberta Goncalves Anversa
- Florey Institute of Neuroscience and Mental HealthMelbourneVICAustralia
- Florey Department of Neuroscience and Mental HealthUniversity of MelbourneMelbourneVICAustralia
| | - Xavier J. Maddern
- Florey Institute of Neuroscience and Mental HealthMelbourneVICAustralia
- Florey Department of Neuroscience and Mental HealthUniversity of MelbourneMelbourneVICAustralia
| | - Andrew J. Lawrence
- Florey Institute of Neuroscience and Mental HealthMelbourneVICAustralia
- Florey Department of Neuroscience and Mental HealthUniversity of MelbourneMelbourneVICAustralia
| | - Leigh C. Walker
- Florey Institute of Neuroscience and Mental HealthMelbourneVICAustralia
- Florey Department of Neuroscience and Mental HealthUniversity of MelbourneMelbourneVICAustralia
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2
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Maddern XJ, Letherby B, Ch'ng SS, Pearl A, Gogos A, Lawrence AJ, Walker LC. Cocaine and amphetamine regulated transcript (CART) mediates sex differences in binge drinking through central taste circuits. Neuropsychopharmacology 2024; 49:541-550. [PMID: 37608219 PMCID: PMC10789734 DOI: 10.1038/s41386-023-01712-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 08/09/2023] [Accepted: 08/11/2023] [Indexed: 08/24/2023]
Abstract
The neuropeptide cocaine- and amphetamine-regulated transcript (CART) has been implicated in alcohol consumption and reward behaviours, yet mechanisms mediating these effects have yet to be identified. Using a transgenic CART knockout (KO) mouse line we uncovered a sexually dimorphic effect of CART in binge drinking, with male CART KO mice increasing intake, whilst female CART KO mice decreased their alcohol intake compared to controls. Female CART KO mice show greater sensitivity to bitter solutions that can be overshadowed through addition of a sweetener, implicating taste as a factor. Further we identify that this is not driven through peripherally circulating sex hormones, but the central nucleus of the amygdala (CeA) is a locus where CART contributes to the regulation of alcohol consumption, with CeA CART neutralisation specifically reducing plain alcohol, but not sweetened alcohol consumption in female mice. These findings may have implications for the development of sex-specific treatment options for alcohol use disorders through targeting the CART system.
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Affiliation(s)
- Xavier J Maddern
- Florey Institute of Neuroscience and Mental Health, Parkville, VIC, 3052, Australia
- Florey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Bethany Letherby
- Florey Institute of Neuroscience and Mental Health, Parkville, VIC, 3052, Australia
- Florey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Sarah S Ch'ng
- Florey Institute of Neuroscience and Mental Health, Parkville, VIC, 3052, Australia
- Florey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Amy Pearl
- Florey Institute of Neuroscience and Mental Health, Parkville, VIC, 3052, Australia
- Florey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Andrea Gogos
- Florey Institute of Neuroscience and Mental Health, Parkville, VIC, 3052, Australia
- Florey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Andrew J Lawrence
- Florey Institute of Neuroscience and Mental Health, Parkville, VIC, 3052, Australia
- Florey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Leigh C Walker
- Florey Institute of Neuroscience and Mental Health, Parkville, VIC, 3052, Australia.
- Florey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, 3052, Australia.
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Vannan A, Dell’Orco M, Perrone-Bizzozero NI, Neisewander JL, Wilson MA. An approach for prioritizing candidate genes from RNA-seq using preclinical cocaine self-administration datasets as a test case. G3 (BETHESDA, MD.) 2023; 13:jkad143. [PMID: 37433118 PMCID: PMC10542560 DOI: 10.1093/g3journal/jkad143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 06/03/2023] [Accepted: 06/07/2023] [Indexed: 07/13/2023]
Abstract
RNA-sequencing (RNA-seq) technology has led to a surge of neuroscience research using animal models to probe the complex molecular mechanisms underlying brain function and behavior, including substance use disorders. However, findings from rodent studies often fail to be translated into clinical treatments. Here, we developed a novel pipeline for narrowing candidate genes from preclinical studies by translational potential and demonstrated its utility in 2 RNA-seq studies of rodent self-administration. This pipeline uses evolutionary conservation and preferential expression of genes across brain tissues to prioritize candidate genes, increasing the translational utility of RNA-seq in model organisms. Initially, we demonstrate the utility of our prioritization pipeline using an uncorrected P-value. However, we found no differentially expressed genes in either dataset after correcting for multiple testing with false discovery rate (FDR < 0.05 or <0.1). This is likely due to low statistical power that is common across rodent behavioral studies, and, therefore, we additionally illustrate the use of our pipeline on a third dataset with differentially expressed genes corrected for multiple testing (FDR < 0.05). We also advocate for improved RNA-seq data collection, statistical testing, and metadata reporting that will bolster the field's ability to identify reliable candidate genes and improve the translational value of bioinformatics in rodent research.
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Affiliation(s)
- Annika Vannan
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA
| | - Michela Dell’Orco
- Department of Neurosciences, University of New Mexico Health Science Center, University of New Mexico, Albuquerque, NM 87131-0001, USA
| | - Nora I Perrone-Bizzozero
- Department of Neurosciences, University of New Mexico Health Science Center, University of New Mexico, Albuquerque, NM 87131-0001, USA
| | - Janet L Neisewander
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA
| | - Melissa A Wilson
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA
- Center for Evolution and Medicine, Arizona State University, Tempe, AZ 85287-4501, USA
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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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Al-Omari A, Kecskés M, Gaszner B, Biró-Sütő T, Fazekas B, Berta G, Kuzma M, Pintér E, Kormos V. Functionally active TRPA1 ion channel is downregulated in peptidergic neurons of the Edinger-Westphal nucleus upon acute alcohol exposure. Front Cell Dev Biol 2023; 10:1046559. [PMID: 36704197 PMCID: PMC9872022 DOI: 10.3389/fcell.2022.1046559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 12/21/2022] [Indexed: 01/12/2023] Open
Abstract
Introduction: The centrally projecting Edinger-Westphal nucleus (EWcp) contributes to the control of alcohol consumption by its urocortin 1 (UCN1) and cocaine- and amphetamine-regulated transcript (CART) co-expressing peptidergic neurons. Our group recently showed that the urocortinergic centrally projecting EWcp is the primary seat of central nervous system transient receptor potential ankyrin 1 (TRPA1) cation channel mRNA expression. Here, we hypothesized that alcohol and its metabolites, that pass through the blood-brain barrier, may influence the function of urocortinergic cells in centrally projecting EWcp by activating TRPA1 ion channels. We aimed to examine the functional activity of TRPA1 in centrally projecting EWcp and its possible role in a mouse model of acute alcohol exposure. Methods: Electrophysiological measurements were performed on acute brain slices of C57BL/6J male mice containing the centrally projecting EWcp to prove the functional activity of TRPA1 using a selective, potent, covalent agonist JT010. Male TRPA1 knockout (KO) and wildtype (WT) mice were compared with each other in the morphological studies upon acute alcohol treatment. In both genotypes, half of the animals was treated intraperitoneally with 1 g/kg 6% ethanol vs. physiological saline-injected controls. Transcardial perfusion was performed 2 h after the treatment. In the centrally projecting EWcp area, FOS immunohistochemistry was performed to assess neuronal activation. TRPA1, CART, and urocortin 1 mRNA expression as well as urocortin 1 and CART peptide content was semi-quantified by RNAscope in situ hybridization combined with immunofluorescence. Results: JT010 activated TRPA1 channels of the urocortinergic cells in acute brain slices. Alcohol treatment resulted in a significant FOS activation in both genotypes. Alcohol decreased the Trpa1 mRNA expression in WT mice. The assessment of urocortin 1 peptide immunoreactivity revealed lower basal urocortin 1 in KO mice compared to WTs. The urocortin 1 peptide content was affected genotype-dependently by alcohol: the peptide content decreased in WTs while it increased in KO mice. Alcohol exposure influenced neither CART and urocortin 1 mRNA expression nor the centrally projecting EWcp/CART peptide content. Conclusion: We proved the presence of functional TRPA1 receptors on urocortin 1 neurons of the centrally projecting EWcp. Decreased Trpa1 mRNA expression upon acute alcohol treatment, associated with reduced neuronal urocortin 1 peptide content suggesting that this cation channel may contribute to the regulation of the urocortin 1 release.
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Affiliation(s)
- Ammar Al-Omari
- Department of Pharmacology and Pharmacotherapy, Centre for Neuroscience, Szentágothai Research Centre, Medical School and Molecular Pharmacology Research Group, University of Pécs, Pécs, Hungary
| | - Miklós Kecskés
- Medical School, Institute of Physiology, University of Pécs, Pécs, Hungary
| | - Balázs Gaszner
- Department of Anatomy, Centre for Neuroscience, Medical School and Research Group for Mood Disorders, University of Pécs, Pécs, Hungary
| | - Tünde Biró-Sütő
- Department of Pharmacology and Pharmacotherapy, Centre for Neuroscience, Szentágothai Research Centre, Medical School and Molecular Pharmacology Research Group, University of Pécs, Pécs, Hungary
| | - Balázs Fazekas
- Department of Pharmacology and Pharmacotherapy, Centre for Neuroscience, Szentágothai Research Centre, Medical School and Molecular Pharmacology Research Group, University of Pécs, Pécs, Hungary
| | - Gergely Berta
- Department of Medical Biology, Medical School, University of Pécs, Pécs, Hungary
| | - Mónika Kuzma
- Department of Forensic Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Centre for Neuroscience, Szentágothai Research Centre, Medical School and Molecular Pharmacology Research Group, University of Pécs, Pécs, Hungary
| | - Viktória Kormos
- Department of Pharmacology and Pharmacotherapy, Centre for Neuroscience, Szentágothai Research Centre, Medical School and Molecular Pharmacology Research Group, University of Pécs, Pécs, Hungary
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Cho BR, Kim WY, Jang JK, Lee JW, Kim JH. Glycogen Synthase Kinase 3β Is a Key Regulator in the Inhibitory Effects of Accumbal Cocaine- and Amphetamine-Regulated Transcript Peptide 55-102 on Amphetamine-Induced Locomotor Activity. Int J Mol Sci 2022; 23:ijms232415633. [PMID: 36555273 PMCID: PMC9779470 DOI: 10.3390/ijms232415633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/06/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
Microinjection of cocaine- and amphetamine-regulated transcript (CART) peptide 55-102 into the nucleus accumbens (NAcc) core significantly attenuates psychostimulant-induced locomotor activity. However, the molecular mechanism remains poorly understood. We examined the phosphorylation levels of Akt, glycogen synthase kinase 3β (GSK3β), and glutamate receptor 1 (GluA1) in NAcc core tissues obtained 60 min after microinjection of CART peptide 55-102 into this site, followed by systemic injection of amphetamine (AMPH). Phosphorylation levels of Akt at Thr308 and GSK3β at Ser9 were decreased, while those of GluA1 at Ser845 were increased, by AMPH treatment. These effects returned to basal levels following treatment with CART peptide 55-102. Furthermore, the negative regulatory effects of the CART peptide on AMPH-induced changes in phosphorylation levels and locomotor activity were all abolished by pretreatment with the S9 peptide, an artificially synthesized indirect GSK3β activator. These results suggest that the CART peptide 55-102 in the NAcc core plays a negative regulatory role in AMPH-induced locomotor activity by normalizing the changes in phosphorylation levels of Akt-GSK3β, and subsequently GluA1 modified by AMPH at this site. The present findings are the first to reveal GSK3β as a key regulator of the inhibitory role of the CART peptide in psychomotor stimulant-induced locomotor activity.
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Affiliation(s)
- Bo Ram Cho
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06519, USA
| | - Wha Young Kim
- Department of Physiology, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Ju Kyong Jang
- Department of Pharmacology, Bio-Pharm Solutions Co., Ltd., Suwon-si 16229, Gyeonggi-do, Republic of Korea
| | - Jung Won Lee
- Division of In Vitro Diagnostic Devices, National Institute of Food and Drug Safety Evaluation, Cheongju-si 28159, Chungcheongbuk-do, Republic of Korea
| | - Jeong-Hoon Kim
- Department of Physiology, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
- Department of Medical Sciences, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
- Correspondence:
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Михеев РК, Романцова ТИ, Трошина ЕА, Григорян ОР, Андреева ЕН, Шереметьева ЕВ, Абсатарова ЮС, Мокрышева НГ. [Cocaine-amphetamine regulated transcript (CART) - promising omics breakthrough in the endocrinology]. PROBLEMY ENDOKRINOLOGII 2022; 68:4-8. [PMID: 35488751 PMCID: PMC9112847 DOI: 10.14341/probl12872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 01/26/2022] [Accepted: 01/25/2022] [Indexed: 12/16/2022]
Abstract
BACKGROUND The cocaine-amphetamine regulated transcript has been discovered long time ago (circa over 25 years ago) but still stays not enough investigated. Just during last five years scientist's society started providing interest to the genomic, proteomic and metabolic essence of the cocaine-amphetamine regulated transcript. AIM The evaluation of historical pathway and perspectives of the cocaine-amphetamine regulated transcript medical investigations. MATERIALS AND METHODS The literature search has been provided via Russian (eLibrary, CyberLeninka.ru) and international (PubMed, Cochrane Library) databases and among articles on Russian and English languages. The main criteria for article selection was free access and 2019-2021 years of publishing. Although the introduction is based on the articles published in 1989. The present article was created according to the federal project «Central and peripheral pathophysiological mechanisms of adipose tissue diseases and their clinical and hormonal manifestations патофизиологические механизмы развития болезней жировой ткани с учетом клинических и гормональных характеристик» (2020-2022)RESULTS AND CONCLUISON: It is necessary to keep on investigating genomic, proteomic and metabolomic markers because they contain important clues for successful resistance against human diseases. The 21st century is the era of transformation from simple clinical medicine to personalized science. For example, researches in the area of cocaine-amphetamine regulated transcript may result in invention of genetic medicine against dangerous metabolic diseases.
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Affiliation(s)
- Р. К. Михеев
- Национальный медицинский исследовательский центр эндокринологии
| | - Т. И. Романцова
- Первый московский государственный медицинский университет им. И.М. Сеченова (Сеченовский университет)
| | - Е. А. Трошина
- Национальный медицинский исследовательский центр эндокринологии
| | - О. Р. Григорян
- Национальный медицинский исследовательский центр эндокринологии
| | - Е. Н. Андреева
- Национальный медицинский исследовательский центр эндокринологии
| | | | | | - Н. Г. Мокрышева
- Национальный медицинский исследовательский центр эндокринологии
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Mahmoudinezhad M, Abbasalizad-Farhangi M, Kahroba H. Hypothalamic-pituitary hormones will be affected by the interaction between 5q13-14-rs2239670 (CARTPT) gene variants and diet in different obesity phenotypes. BMC Res Notes 2021; 14:443. [PMID: 34876220 PMCID: PMC8649315 DOI: 10.1186/s13104-021-05857-5] [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: 05/14/2021] [Accepted: 11/23/2021] [Indexed: 11/26/2022] Open
Abstract
Objective Evidence show that cocaine and amphetamine regulated transcript-prepropeptide (CART-PT) gene variants may affect obesity related traits, but little is known about its end points. In the current study, we aimed to evaluate the interaction of CARTPT gene polymorphism with diet quality indices including dietary approaches to stop hypertension (DASH) and Mediterranean diet score (MDS) on cardio-metabolic risk factors. This cross sectional study recruited 288 apparently healthy obese individuals. Diet quality indices including DASH and MDS were evaluated using semi quantitative food frequency questionnaire (FFQ). Polymerase chain reaction-restriction fragment length polymorphism (PCR–RFLP) was used for CARTPT genotypes. Results No significant differences was reported for general characteristics and biochemical parameters across genotypes except for QUICKI among females (P = 0.01) and it was higher in heterozygous genotype. There was significant CARTPT-DASH interactions affecting serum fasting glucose level (P = 0.049). However, in relation to CERTPT-MDS interactions, the highest level of insulin (P = 0.003) and HOMA-IR (P = 0.003) values were shown among AA carriers in high adherence to MDS, while AA carriers in high compliance to MDS experienced decreased level of QUICKI (P = 0.001). Supplementary Information The online version contains supplementary material available at 10.1186/s13104-021-05857-5.
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Affiliation(s)
- Mahsa Mahmoudinezhad
- Department of Community Nutrition, Faculty of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahdieh Abbasalizad-Farhangi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Attar-neishabouri Ave, Golgasht St, 5165665931, Tabriz, Iran.
| | - Houman Kahroba
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium.,Department of Toxicogenomics, GROW School of Oncology and Development Biology, Maastricht University, Maastricht, The Netherlands
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9
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Shewale SA, Deshbhratar SM, Ravikumar A, Bhargava SY. Cocaine and amphetamine regulated transcript peptide (CART) in the tadpole brain: Response to different energy states. Neuropeptides 2021; 88:102152. [PMID: 33932859 DOI: 10.1016/j.npep.2021.102152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 04/04/2021] [Accepted: 04/18/2021] [Indexed: 12/18/2022]
Abstract
Cocaine- and amphetamine-regulated transcript peptide (CART) is an anorexigenic neuropeptide known to play a key role in energy homeostasis across the vertebrate phyla. In the current study, we have investigated the response of the CART immunoreactive system to varying energy states in the brain of a tadpole model. The pro-metamorphic tadpoles of Euphlyctis cyanophlyctis were fasted, or intracranially injected with glucose or 2-deoxy-d-glucose (2DG; an antagonist to glucose inducing glucoprivation) and the response of the CART containing system in various neuroanatomical areas was studied using immunohistochemistry. Glucose administration increased the CART immunoreactivity in the entopeduncular neurons (EN), preoptic area (POA), ventral hypothalamus (vHy) and the Edinger Westphal nucleus (EW) while CART positive cells decrease in response to fasting and glucoprivation. A substantial decrease in CART was noted in the EW nucleus of tadpoles injected with 2DG. These regions might contain the glucose-sensing neurons and regulate food intake in anurans. Therefore, we speculate that the function of central CART and its antagonistic action with NPY in food and feeding circuitry of anurans is evolutionary conserved and might be responsible for glucose homeostasis.
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Affiliation(s)
- Swapnil A Shewale
- Department of Zoology, Savitribai Phule Pune University, Ganeshkhind, Pune 411 007, India; Department of Zoology, Bhavan's Hazarimal Somani College, Chowpatty, Mumbai 400 007, India
| | - Shantaj M Deshbhratar
- Department of Zoology, Bhavan's Hazarimal Somani College, Chowpatty, Mumbai 400 007, India
| | - Ameeta Ravikumar
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Ganeshkhind, Pune 411 007, India
| | - Shobha Y Bhargava
- Department of Zoology, Savitribai Phule Pune University, Ganeshkhind, Pune 411 007, India.
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10
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Awathale SN, Choudhary AG, Subhedar NK, Kokare DM. Neuropeptide CART modulates dopamine turnover in the nucleus accumbens: Insights into the anatomy of rewarding circuits. J Neurochem 2021; 158:1172-1185. [PMID: 34287909 DOI: 10.1111/jnc.15479] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/18/2021] [Accepted: 07/18/2021] [Indexed: 12/25/2022]
Abstract
Neuropeptide cocaine- and amphetamine-regulated transcript (CART) is known to influence the activity of the canonical mesolimbic dopaminergic pathway and modulate reward seeking behaviour. CART neurons of the lateral hypothalamus (LH) send afferents to the ventral tegmental area (VTA) and paraventricular thalamic nucleus (PVT) and these nuclei, in turn, send secondary projections to nucleus accumbens. We try to dissect the precise sites of CART's action in these circuits in promoting reward. Rats were implanted with bipolar electrode targeted at the lateral hypothalamus-medial forebrain bundle (LH-MFB) and trained to press the lever through intracranial self-stimulation (ICSS) protocol. CART (55-102) administered directly into posterior VTA (pVTA) or PVT of the conditioned rats significantly increased the number of lever presses, indicating reward-promoting activity of the peptide. Concomitant increase in dopamine (DA) and 3, 4-dihydroxyphenylacetic acid (DOPAC) efflux was noted in the microdialysate collected from the nucleus accumbens shell (AcbSh). On the other hand, immunoneutralization of endogenous CART with CART antibodies injected directly in the pVTA or PVT reduced the lever press activity as well as DA and DOPAC efflux in the AcbSh. Injection of CART (1-39) in pVTA or PVT was ineffective. We suggest that CART cells in the LH-MFB area send afferents to (a) pVTA and influence dopaminergic neurons projecting to AcbSh and (b) PVT, from where the secondary neurons may feed into the AcbSh. Excitation of the CARTergic pathway to the pVTA as well as the PVT seems to promote DA release in the AcbSh and contribute to the generation of reward.
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Affiliation(s)
- Sanjay N Awathale
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India
| | - Amit G Choudhary
- Indian Institute of Science Education and Research (IISER), Pune, India
| | | | - Dadasaheb M Kokare
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India
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11
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Gabery S, Ahmed RM, Caga J, Kiernan MC, Halliday GM, Petersén Å. Loss of the metabolism and sleep regulating neuronal populations expressing orexin and oxytocin in the hypothalamus in amyotrophic lateral sclerosis. Neuropathol Appl Neurobiol 2021; 47:979-989. [PMID: 33755993 DOI: 10.1111/nan.12709] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 03/14/2021] [Accepted: 03/15/2021] [Indexed: 12/12/2022]
Abstract
AIMS To determine the underlying cellular changes and clinical correlates associated with pathology of the hypothalamus in amyotrophic lateral sclerosis (ALS), as hypothalamic atrophy occurs in the preclinical phase of the disease. METHODS The hypothalamus was pathologically examined in nine patients with amyotrophic lateral sclerosis in comparison to eight healthy control subjects. The severity of regional atrophy (paraventricular nucleus: PVN, fornix and total hypothalamus) and peptidergic neuronal loss (oxytocin, vasopressin, cocaine- and amphetamine-regulating transcript: CART, and orexin) was correlated with changes in eating behaviour, sleep function, cognition, behaviour and disease progression. RESULTS Tar DNA-binding protein 43 (TDP-43) inclusions were present in the hypothalamus of all patients with amyotrophic lateral sclerosis. When compared to controls, there was atrophy of the hypothalamus (average 21% atrophy, p = 0.004), PVN (average 30% atrophy p = 0.014) and a loss of paraventricular oxytocin-producing neurons (average 49% loss p = 0.02) and lateral hypothalamic orexin-producing neurons (average 37% loss, significance p = 0.02). Factor analysis identified strong relationships between abnormal eating behaviour, hypothalamic atrophy and loss of orexin-producing neurons. With increasing disease progression, abnormal sleep behaviour and cognition associated with atrophy of the fornix. CONCLUSIONS Substantial loss of hypothalamic oxytocin-producing neurons occurs in ALS, with regional atrophy and the loss of orexin neurons relating to abnormal eating behaviour in ALS. Oxytocin- and orexin neurons display TDP43 inclusions. Our study points to significant pathology in the hypothalamus that may play a key role in metabolic and pathogenic changes in ALS.
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Affiliation(s)
- Sanaz Gabery
- Translational Neuroendocrine Research Unit, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Rebekah M Ahmed
- Memory and Cognition Clinic, Department of Clinical Neurosciences, Royal Prince Alfred Hospital, Sydney, NSW, Australia.,Brain & Mind Centre and Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Jashelle Caga
- Brain & Mind Centre and Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Matthew C Kiernan
- Memory and Cognition Clinic, Department of Clinical Neurosciences, Royal Prince Alfred Hospital, Sydney, NSW, Australia.,Brain & Mind Centre and Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Glenda M Halliday
- Brain & Mind Centre and Faculty of Medicine and Health, School of Medical Sciences, The University of Sydney, Sydney, NSW, Australia
| | - Åsa Petersén
- Translational Neuroendocrine Research Unit, Department of Experimental Medical Science, Lund University, Lund, Sweden
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12
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Walker LC. A balancing act: the role of pro- and anti-stress peptides within the central amygdala in anxiety and alcohol use disorders. J Neurochem 2021; 157:1615-1643. [PMID: 33450069 DOI: 10.1111/jnc.15301] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 12/18/2020] [Accepted: 01/06/2021] [Indexed: 12/21/2022]
Abstract
The central nucleus of the amygdala (CeA) is widely implicated as a structure that integrates both appetitive and aversive stimuli. While intrinsic CeA microcircuits primarily consist of GABAergic neurons that regulate amygdala output, a notable feature of the CeA is the heterogeneity of neuropeptides and neuropeptide/neuromodulator receptors that it expresses. There is growing interest in the role of the CeA in mediating psychopathologies, including stress and anxiety states and their interactions with alcohol use disorders. Within the CeA, neuropeptides and neuromodulators often exert pro- or anti- stress actions, which can influence anxiety and alcohol associated behaviours. In turn, alcohol use can cause adaptions within the CeA, which may render an individual more vulnerable to stress which is a major trigger of relapse to alcohol seeking. This review examines the neurocircuitry, neurochemical phenotypes and how pro- and anti-stress peptide systems act within the CeA to regulate anxiety and alcohol seeking, focusing on preclinical observations from animal models. Furthermore, literature exploring the targeting of genetically defined populations or neuronal ensembles and the role of the CeA in mediating sex differences in stress x alcohol interactions are explored.
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Affiliation(s)
- Leigh C Walker
- Florey Institute of Neuroscience and Mental Health, Parkville, Vic, Australia.,Florey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, Vic, Australia
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13
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Curtis GR, Oakes K, Barson JR. Expression and Distribution of Neuropeptide-Expressing Cells Throughout the Rodent Paraventricular Nucleus of the Thalamus. Front Behav Neurosci 2021; 14:634163. [PMID: 33584216 PMCID: PMC7873951 DOI: 10.3389/fnbeh.2020.634163] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 12/21/2020] [Indexed: 12/14/2022] Open
Abstract
The paraventricular nucleus of the thalamus (PVT) has been shown to make significant contributions to affective and motivated behavior, but a comprehensive description of the neurochemicals expressed in the cells of this brain region has never been presented. While the PVT is believed to be composed of projection neurons that primarily use as their neurotransmitter the excitatory amino acid, glutamate, several neuropeptides have also been described in this brain region. In this review article, we combine published literature with our observations from the Allen Brain Atlas to describe in detail the expression and distribution of neuropeptides in cells throughout the mouse and rat PVT, with a special focus on neuropeptides known to be involved in behavior. Several themes emerge from this investigation. First, while the majority of neuropeptides are expressed across the antero-posterior axis of the PVT, they generally exist in a gradient, in which expression is most dense but not exclusive in either the anterior or posterior PVT, although other neuropeptides display somewhat more equal expression in the anterior and posterior PVT but have reduced expression in the middle PVT. Second, we find overall that neuropeptides involved in arousal are more highly expressed in the anterior PVT, those involved in depression-like behavior are more highly expressed in the posterior PVT, and those involved in reward are more highly expressed in the medial PVT, while those involved in the intake of food and drugs of abuse are distributed throughout the PVT. Third, the pattern and content of neuropeptide expression in mice and rats appear not to be identical, and many neuropeptides found in the mouse PVT have not yet been demonstrated in the rat. Thus, while significantly more work is required to uncover the expression patterns and specific roles of individual neuropeptides in the PVT, the evidence thus far supports the existence of a diverse yet highly organized system of neuropeptides in this nucleus. Determined in part by their location within the PVT and their network of projections, the function of the neuropeptides in this system likely involves intricate coordination to influence both affective and motivated behavior.
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Affiliation(s)
- Genevieve R Curtis
- Department of Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, PA, United States
| | - Kathleen Oakes
- Department of Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, PA, United States
| | - Jessica R Barson
- Department of Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, PA, United States
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14
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Walker LC, Hand LJ, Letherby B, Huckstep KL, Campbell EJ, Lawrence AJ. Cocaine and amphetamine regulated transcript (CART) signalling in the central nucleus of the amygdala modulates stress-induced alcohol seeking. Neuropsychopharmacology 2021; 46:325-333. [PMID: 32826981 PMCID: PMC7852518 DOI: 10.1038/s41386-020-00807-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 07/19/2020] [Accepted: 08/11/2020] [Indexed: 12/16/2022]
Abstract
The central nucleus of the amygdala (CeA) is a key hub of the neural circuitry regulating alcohol and stress interactions. However, the exact neuronal populations that govern this interaction are not well defined. Here we examined the role of the neuropeptide cocaine and amphetamine regulated transcript (CART) within the CeA in stress-induced alcohol seeking. We found that CART-containing neurons are predominantly expressed in the capsular/lateral division of the CeA and are a subpopulation of protein kinase Cδ (PKCδ) cells, distinct from corticotrophin releasing factor (CRF)-expressing cells. Both stress (yohimbine) and stress-induced alcohol seeking activated CART cells within the CeA, while neutralisation of endogenous CeA CART signalling (via antibody administration) attenuated stress-induced alcohol, but not sucrose seeking. Further, blocking CART signalling within the CeA did not alter the motivation to obtain and consume alcohol but did attenuate stressor-induced anxiety-like behaviour during abstinence from alcohol. Together, these data identify CeA CART cells as a subpopulation of PKCδ cells that influence stress × alcohol interactions and mediate stress-induced alcohol seeking behaviours.
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Affiliation(s)
- Leigh C. Walker
- grid.418025.a0000 0004 0606 5526Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, VIC 3052 Australia ,grid.1008.90000 0001 2179 088XFlorey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, 3052 Australia
| | - Lexi J. Hand
- grid.418025.a0000 0004 0606 5526Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, VIC 3052 Australia ,grid.1008.90000 0001 2179 088XFlorey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, 3052 Australia
| | - Bethany Letherby
- grid.418025.a0000 0004 0606 5526Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, VIC 3052 Australia ,grid.1008.90000 0001 2179 088XFlorey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, 3052 Australia
| | - Kate L. Huckstep
- grid.418025.a0000 0004 0606 5526Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, VIC 3052 Australia ,grid.1008.90000 0001 2179 088XFlorey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, 3052 Australia
| | - Erin J. Campbell
- grid.418025.a0000 0004 0606 5526Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, VIC 3052 Australia ,grid.1008.90000 0001 2179 088XFlorey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, 3052 Australia
| | - Andrew J. Lawrence
- grid.418025.a0000 0004 0606 5526Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, VIC 3052 Australia ,grid.1008.90000 0001 2179 088XFlorey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, 3052 Australia
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15
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The role of neuropeptides in drug and ethanol abuse: Medication targets for drug and alcohol use disorders. Brain Res 2020; 1740:146876. [DOI: 10.1016/j.brainres.2020.146876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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