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Concetti C, Viskaitis P, Grujic N, Duss SN, Privitera M, Bohacek J, Peleg-Raibstein D, Burdakov D. Exploratory Rearing Is Governed by Hypothalamic Melanin-Concentrating Hormone Neurons According to Locus Ceruleus. J Neurosci 2024; 44:e0015242024. [PMID: 38575343 PMCID: PMC11112542 DOI: 10.1523/jneurosci.0015-24.2024] [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: 01/03/2024] [Revised: 03/20/2024] [Accepted: 03/25/2024] [Indexed: 04/06/2024] Open
Abstract
Information seeking, such as standing on tiptoes to look around in humans, is observed across animals and helps survival. Its rodent analog-unsupported rearing on hind legs-was a classic model in deciphering neural signals of cognition and is of intense renewed interest in preclinical modeling of neuropsychiatric states. Neural signals and circuits controlling this dedicated decision to seek information remain largely unknown. While studying subsecond timing of spontaneous behavioral acts and activity of melanin-concentrating hormone (MCH) neurons (MNs) in behaving male and female mice, we observed large MN activity spikes that aligned to unsupported rears. Complementary causal, loss and gain of function, analyses revealed specific control of rear frequency and duration by MNs and MCHR1 receptors. Activity in a key stress center of the brain-the locus ceruleus noradrenaline cells-rapidly inhibited MNs and required functional MCH receptors for its endogenous modulation of rearing. By defining a neural module that both tracks and controls rearing, these findings may facilitate further insights into biology of information seeking.
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Affiliation(s)
- Cristina Concetti
- Department of Health Sciences and Technology, Neuroscience Center Zürich (ZNZ), Swiss Federal Institute of Technology (ETH Zürich), Zürich 8092, Switzerland
| | - Paulius Viskaitis
- Department of Health Sciences and Technology, Neuroscience Center Zürich (ZNZ), Swiss Federal Institute of Technology (ETH Zürich), Zürich 8092, Switzerland
| | - Nikola Grujic
- Department of Health Sciences and Technology, Neuroscience Center Zürich (ZNZ), Swiss Federal Institute of Technology (ETH Zürich), Zürich 8092, Switzerland
| | - Sian N Duss
- Department of Health Sciences and Technology, Neuroscience Center Zürich (ZNZ), Swiss Federal Institute of Technology (ETH Zürich), Zürich 8092, Switzerland
| | - Mattia Privitera
- Department of Health Sciences and Technology, Neuroscience Center Zürich (ZNZ), Swiss Federal Institute of Technology (ETH Zürich), Zürich 8092, Switzerland
| | - Johannes Bohacek
- Department of Health Sciences and Technology, Neuroscience Center Zürich (ZNZ), Swiss Federal Institute of Technology (ETH Zürich), Zürich 8092, Switzerland
| | - Daria Peleg-Raibstein
- Department of Health Sciences and Technology, Neuroscience Center Zürich (ZNZ), Swiss Federal Institute of Technology (ETH Zürich), Zürich 8092, Switzerland
| | - Denis Burdakov
- Department of Health Sciences and Technology, Neuroscience Center Zürich (ZNZ), Swiss Federal Institute of Technology (ETH Zürich), Zürich 8092, Switzerland
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Su AX, Ma ZJ, Li ZY, Li XY, Xia L, Ge YJ, Chen GH. Serum levels of neurotensin, pannexin-1, and sestrin-2 and the correlations with sleep quality or/and cognitive function in the patients with chronic insomnia disorder. Front Psychiatry 2024; 15:1360305. [PMID: 38803679 PMCID: PMC11128551 DOI: 10.3389/fpsyt.2024.1360305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 04/29/2024] [Indexed: 05/29/2024] Open
Abstract
Objectives To examine serum concentrations of neurotensin, pannexin-1 and sestrin-2, and their correlations with subjective and objective sleep quality and cognitive function in the patients with chronic insomnia disorder (CID). Methods Sixty-five CID patients were enrolled continuously and fifty-six good sleepers in the same period were served as healthy controls (HCs). Serum levels of neurotensin, pannexin-1 and sestrin-2 were measured by enzyme-linked immunosorbent assays. Sleep quality was assessed with the Pittsburgh Sleep Quality Index (PSQI) and polysomnography, and mood was evaluated by 17-item Hamilton Depression Rating Scale. General cognitive function was assessed with the Chinese-Beijing Version of Montreal Cognitive Assessment and spatial memory was evaluated by Blue Velvet Arena Test (BVAT). Results Relative to the HCs, the CID sufferers had higher levels of neurotensin (t=5.210, p<0.001) and pannexin-1 (Z=-4.169, p<0.001), and lower level of sestrin-2 (Z=-2.438, p=0.015). In terms of objective sleep measures, pannexin-1 was positively associated with total sleep time (r=0.562, p=0.002) and sleep efficiency (r=0.588, p=0.001), and negatively with wake time after sleep onset (r=-0.590, p=0.001) and wake time (r=-0.590, p=0.001); sestrin-2 was positively associated with percentage of rapid eye movement sleep (r=0.442, p=0.016) and negatively with non-rapid eye movement sleep stage 2 in the percentage (r=-0.394, p=0.034). Adjusted for sex, age and HAMD, pannexin-1 was still associated with the above objective sleep measures, but sestrin-2 was only negatively with wake time (r=-0.446, p=0.022). However, these biomarkers showed no significant correlations with subjective sleep quality (PSQI score). Serum concentrations of neurotensin and pannexin-1 were positively associated with the mean erroneous distance in the BVAT. Adjusted for sex, age and depression, neurotensin was negatively associated with MoCA score (r=-0.257, p=0.044), pannexin-1 was positively associated with the mean erroneous distance in the BVAT (r=0.270, p=0.033). Conclusions The CID patients had increased neurotensin and pannexin-1 and decreased sestrin-2 in the serum levels, indicating neuron dysfunction, which could be related to poor sleep quality and cognitive dysfunction measured objectively.
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Affiliation(s)
- Ai-Xi Su
- Department of Neurology (Sleep Disorder), The Affiliated Chaohu Hospital of Anhui Medical University, Chaohu, China
- Department of General Medicine, the First Affiliated Hospital of Bengbu Medical University, Bengbu, China
| | - Zi-Jie Ma
- Department of Neurology (Sleep Disorder), The Affiliated Chaohu Hospital of Anhui Medical University, Chaohu, China
| | - Zong-Yin Li
- Department of Neurology (Sleep Disorder), The Affiliated Chaohu Hospital of Anhui Medical University, Chaohu, China
| | - Xue-Yan Li
- Department of Neurology (Sleep Disorder), The Affiliated Chaohu Hospital of Anhui Medical University, Chaohu, China
| | - Lan Xia
- Department of Neurology (Sleep Disorder), The Affiliated Chaohu Hospital of Anhui Medical University, Chaohu, China
| | - Yi-Jun Ge
- Department of Neurology (Sleep Disorder), The Affiliated Chaohu Hospital of Anhui Medical University, Chaohu, China
| | - Gui-Hai Chen
- Department of Neurology (Sleep Disorder), The Affiliated Chaohu Hospital of Anhui Medical University, Chaohu, China
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3
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Baltazar-Soares M, Karell P, Wright D, Nilsson JÅ, Brommer JE. Genomic basis of melanin-associated phenotypes suggests colour-specific environmental adaptations in tawny owls. Mol Ecol 2024; 33:e17247. [PMID: 38173194 DOI: 10.1111/mec.17247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 11/24/2023] [Indexed: 01/05/2024]
Abstract
Feathers comprise a series of evolutionary innovations but also harbour colour, a key biological trait known to co-vary with life history or complex traits. Those relationships are particularly true in melanin-based pigmentation species due to known pleiotropic effects of the melanocortin pathway - originating from melanin-associated phenotypes. Here, we explore the molecular basis of melanin colouration and expected co-variation at the molecular level in the melanin-based, colour polymorphic system of the tawny owl (Strix aluco). An extensive body of literature has revealed that grey and brown tawny owl colour morphs differ in a series of life history and behavioural traits. Thus, it is plausible to expect co-variation also at molecular level between colour morphs. To investigate this possibility, we assembled the first draft genome of the species against which we mapped ddRADseq reads from 220 grey and 150 brown morphs - representing 10 years of pedigree data from a population in Southern Finland - and explored genome-wide associations with colour phenotype. Our results revealed putative molecular signatures of cold adaptation strongly associated with the grey phenotype, namely, a non-synonymous substitution in MCHR1, plus 2 substitutions in non-coding regions of FTCD and FAM135A whose genotype combinations obtained a predictive power of up to 100% (predicting grey colour). These suggest a molecular basis of cold environment adaptations predicted to be grey-morph specific. Our results potentially reveal part of the molecular machinery of melanin-associated phenotypes and provide novel insights towards understanding the functional genomics of colour polymorphism in melanin-based pigmented species.
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Affiliation(s)
| | - Patrik Karell
- Department of Biology, Section of Evolutionary Ecology, Lund University, Lund, Sweden
- Department of Ecology and Genetics, University of Uppsala, Uppsala, Sweden
- Department of Bioeconomy, Novia University of Applied Sciences, Ekenäs, Finland
| | | | - Jan-Åke Nilsson
- Department of Biology, Section of Evolutionary Ecology, Lund University, Lund, Sweden
| | - Jon E Brommer
- Department of Biology, University of Turku, Turku, Finland
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4
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Concetti C, Peleg-Raibstein D, Burdakov D. Hypothalamic MCH Neurons: From Feeding to Cognitive Control. FUNCTION 2023; 5:zqad059. [PMID: 38020069 PMCID: PMC10667013 DOI: 10.1093/function/zqad059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 10/06/2023] [Accepted: 10/11/2023] [Indexed: 12/01/2023] Open
Abstract
Modern neuroscience is progressively elucidating that the classic view positing distinct brain regions responsible for survival, emotion, and cognitive functions is outdated. The hypothalamus demonstrates the interdependence of these roles, as it is traditionally known for fundamental survival functions like energy and electrolyte balance, but is now recognized to also play a crucial role in emotional and cognitive processes. This review focuses on lateral hypothalamic melanin-concentrating hormone (MCH) neurons, producing the neuropeptide MCH-a relatively understudied neuronal population with integrative functions related to homeostatic regulation and motivated behaviors, with widespread inputs and outputs throughout the entire central nervous system. Here, we review early findings and recent literature outlining their role in the regulation of energy balance, sleep, learning, and memory processes.
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Affiliation(s)
- Cristina Concetti
- Neurobehavioural Dynamics Laboratory, ETH Zürich, Schorenstrasse 16, Schwerzenbach 8603, Switzerland
| | - Daria Peleg-Raibstein
- Neurobehavioural Dynamics Laboratory, ETH Zürich, Schorenstrasse 16, Schwerzenbach 8603, Switzerland
| | - Denis Burdakov
- Neurobehavioural Dynamics Laboratory, ETH Zürich, Schorenstrasse 16, Schwerzenbach 8603, Switzerland
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Sarrafha L, Neavin DR, Parfitt GM, Kruglikov IA, Whitney K, Reyes R, Coccia E, Kareva T, Goldman C, Tipon R, Croft G, Crary JF, Powell JE, Blanchard J, Ahfeldt T. Novel human pluripotent stem cell-derived hypothalamus organoids demonstrate cellular diversity. iScience 2023; 26:107525. [PMID: 37646018 PMCID: PMC10460991 DOI: 10.1016/j.isci.2023.107525] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/19/2023] [Accepted: 07/31/2023] [Indexed: 09/01/2023] Open
Abstract
The hypothalamus is a region of the brain that plays an important role in regulating body functions and behaviors. There is a growing interest in human pluripotent stem cells (hPSCs) for modeling diseases that affect the hypothalamus. Here, we established an hPSC-derived hypothalamus organoid differentiation protocol to model the cellular diversity of this brain region. Using an hPSC line with a tyrosine hydroxylase (TH)-TdTomato reporter for dopaminergic neurons (DNs) and other TH-expressing cells, we interrogated DN-specific pathways and functions in electrophysiologically active hypothalamus organoids. Single-cell RNA sequencing (scRNA-seq) revealed diverse neuronal and non-neuronal cell types in mature hypothalamus organoids. We identified several molecularly distinct hypothalamic DN subtypes that demonstrated different developmental maturities. Our in vitro 3D hypothalamus differentiation protocol can be used to study the development of this critical brain structure and can be applied to disease modeling to generate novel therapeutic approaches for disorders centered around the hypothalamus.
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Affiliation(s)
- Lily Sarrafha
- Nash Family Department of Neuroscience, Mount Sinai, New York, NY 10029, USA
- Department of Neurology, Mount Sinai, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Mount Sinai, New York, NY 10029, USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Mount Sinai, New York, NY 10029, USA
- Black Family Stem Cell Institute, Mount Sinai, New York, NY 10029, USA
| | - Drew R. Neavin
- Garvan-Weizmann Centre for Cellular Genomics, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia
| | - Gustavo M. Parfitt
- Nash Family Department of Neuroscience, Mount Sinai, New York, NY 10029, USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Mount Sinai, New York, NY 10029, USA
- Black Family Stem Cell Institute, Mount Sinai, New York, NY 10029, USA
| | | | - Kristen Whitney
- Nash Family Department of Neuroscience, Mount Sinai, New York, NY 10029, USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Mount Sinai, New York, NY 10029, USA
- Department of Pathology, Molecular, and Cell-Based Medicine, Mount Sinai, New York, NY 10029, USA
| | - Ricardo Reyes
- Nash Family Department of Neuroscience, Mount Sinai, New York, NY 10029, USA
- Department of Neurology, Mount Sinai, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Mount Sinai, New York, NY 10029, USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Mount Sinai, New York, NY 10029, USA
- Black Family Stem Cell Institute, Mount Sinai, New York, NY 10029, USA
| | - Elena Coccia
- Nash Family Department of Neuroscience, Mount Sinai, New York, NY 10029, USA
- Department of Neurology, Mount Sinai, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Mount Sinai, New York, NY 10029, USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Mount Sinai, New York, NY 10029, USA
- Black Family Stem Cell Institute, Mount Sinai, New York, NY 10029, USA
| | - Tatyana Kareva
- Nash Family Department of Neuroscience, Mount Sinai, New York, NY 10029, USA
- Department of Neurology, Mount Sinai, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Mount Sinai, New York, NY 10029, USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Mount Sinai, New York, NY 10029, USA
- Black Family Stem Cell Institute, Mount Sinai, New York, NY 10029, USA
| | - Camille Goldman
- Nash Family Department of Neuroscience, Mount Sinai, New York, NY 10029, USA
- Department of Neurology, Mount Sinai, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Mount Sinai, New York, NY 10029, USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Mount Sinai, New York, NY 10029, USA
- Black Family Stem Cell Institute, Mount Sinai, New York, NY 10029, USA
| | - Regine Tipon
- New York Stem Cell Foundation, New York, NY 10019, USA
| | - Gist Croft
- New York Stem Cell Foundation, New York, NY 10019, USA
| | - John F. Crary
- Nash Family Department of Neuroscience, Mount Sinai, New York, NY 10029, USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Mount Sinai, New York, NY 10029, USA
- Department of Pathology, Molecular, and Cell-Based Medicine, Mount Sinai, New York, NY 10029, USA
- Windreich Department of Artificial Intelligence and Human Health, Mount Sinai, New York, NY 10029, USA
| | - Joseph E. Powell
- Garvan-Weizmann Centre for Cellular Genomics, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia
- UNSW Cellular Genomics Futures Institute, University of New South Wales, Kensington, Sydney, NSW 2052, Australia
| | - Joel Blanchard
- Nash Family Department of Neuroscience, Mount Sinai, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Mount Sinai, New York, NY 10029, USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Mount Sinai, New York, NY 10029, USA
- Black Family Stem Cell Institute, Mount Sinai, New York, NY 10029, USA
| | - Tim Ahfeldt
- Nash Family Department of Neuroscience, Mount Sinai, New York, NY 10029, USA
- Department of Neurology, Mount Sinai, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Mount Sinai, New York, NY 10029, USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Mount Sinai, New York, NY 10029, USA
- Black Family Stem Cell Institute, Mount Sinai, New York, NY 10029, USA
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Ruiz-Viroga V, de Ceglia M, Morelli L, Castaño EM, Calvo EB, Suárez J, Rodríguez de Fonseca F, Galeano P, Lagos P. Acute intrahippocampal administration of melanin-concentrating hormone impairs memory consolidation and decreases the expression of MCHR-1 and TrkB receptors. Prog Neuropsychopharmacol Biol Psychiatry 2023; 123:110703. [PMID: 36565982 DOI: 10.1016/j.pnpbp.2022.110703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 11/18/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
Interest in the role of melanin-concentrating hormone (MCH) in memory processes has increased in recent years, with some studies reporting memory-enhancing effects, while others report deleterious effects. Due to these discrepancies, this study seeks to provide new evidence about the role of MCH in memory consolidation and its relation with BDNF/TrkB system. To this end, in the first experiment, increased doses of MCH were acutely administered in both hippocampi to groups of male rats (25, 50, 200, and 500 ng). Microinjections were carried out immediately after finishing the sample trial of two hippocampal-dependent behavioral tasks: the Novel Object Recognition Test (NORT) and the modified Elevated Plus Maze (mEPM) test. Results indicated that a dose of 200 ng of MCH or higher impaired memory consolidation in both tasks. A second experiment was performed in which a dose of 200 ng of MCH was administered alone or co-administered with the MCHR-1 antagonist ATC-0175 at the end of the sample trial in the NORT. Results showed that MCH impaired memory consolidation, while the co-administration with ATC-0175 reverted this detrimental effect. Moreover, MCH induced a significant decrease in hippocampal MCHR-1 and TrkB expression with no modification in the expression of BDNF and NMDA receptor subunits NR1, NR2A, and NR2B. These results suggest that MCH in vivo elicits pro-amnesic effects in the rat hippocampus by decreasing the availability of its receptor and TrkB receptors, thus linking both endogenous systems to memory processes.
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Affiliation(s)
- Vicente Ruiz-Viroga
- Departamento de Fisiología, Facultad de Medicina, Universidad de la República, Gral. Flores 2125, Montevideo ZP11800, Uruguay
| | - Marialuisa de Ceglia
- UGC Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Universidad de Málaga, Av. Carlos Haya 82, Málaga 29010, Spain.
| | - Laura Morelli
- Laboratory of Brain Aging and Neurodegeneration, Fundación Instituto Leloir (IIBBA-CONICET), Av. Patricias Argentinas 435, Ciudad Autónoma de Buenos Aires C1405BWE, Argentina.
| | - Eduardo M Castaño
- Laboratory of Brain Aging and Neurodegeneration, Fundación Instituto Leloir (IIBBA-CONICET), Av. Patricias Argentinas 435, Ciudad Autónoma de Buenos Aires C1405BWE, Argentina.
| | - Eduardo Blanco Calvo
- Instituto de Investigación Biomédica de Málaga (IBIMA), Departamento de Psicobiología y Metodología de las Ciencias del Comportamiento, Universidad de Málaga, Campus de Teatinos S/N, Málaga 29071, Spain.
| | - Juan Suárez
- Instituto de Investigación Biomédica de Málaga (IBIMA), Departamento de Anatomía Humana, Medicina Legal e Historia de la Ciencia, Universidad de Málaga, Málaga 29071, Spain.
| | - Fernando Rodríguez de Fonseca
- UGC Salud Mental, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga, Universidad de Málaga, Av. Carlos Haya 82, Málaga 29010, Spain.
| | - Pablo Galeano
- Laboratory of Brain Aging and Neurodegeneration, Fundación Instituto Leloir (IIBBA-CONICET), Av. Patricias Argentinas 435, Ciudad Autónoma de Buenos Aires C1405BWE, Argentina.
| | - Patricia Lagos
- Departamento de Fisiología, Facultad de Medicina, Universidad de la República, Gral. Flores 2125, Montevideo ZP11800, Uruguay.
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7
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Amano M, Amiya N, Yamamoto N, Sakakura Y. Neuronal responses of melanin-concentrating hormone and corticotropin-releasing hormone to background color in the self-fertilizing fish, Kryptolebias marmoratus. FISH PHYSIOLOGY AND BIOCHEMISTRY 2023; 49:385-398. [PMID: 37043055 DOI: 10.1007/s10695-023-01178-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 03/09/2023] [Indexed: 05/04/2023]
Abstract
We examined neuronal responses of hypothalamic melanin-concentrating hormone (MCH) and corticotropin-releasing hormone (CRH) to background color in the self-fertilizing fish, Kryptolebias marmoratus. Fish were individually reared in lidless white or black cylindrical plastic containers for 15 days. The number of MCH-immunoreactive (ir) cell bodies in the nucleus lateralis tuberis (NLT) of the hypothalamus was significantly greater in the white-acclimated fish, while no significant differences were observed in the nucleus anterior tuberis (NAT) of the hypothalamus. Significant differences were not seen in the number of CRH-ir cell bodies in the NLT between the groups. The body of the white- and black-acclimated fish appeared lighter and darker, respectively, compared with the baseline color. In the black-acclimated fish, feeding activity was significantly greater with a tendency toward higher specific growth rate compared with the observations in white-acclimated fish. No significant inter-group cortisol level differences were observed. These results indicate that background color affects MCH neuronal activity in the NLT as well as body color adaptation but does not affect CRH neuronal activity in K. marmoratus.
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Affiliation(s)
- Masafumi Amano
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan.
| | - Noriko Amiya
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
| | - Naoyuki Yamamoto
- Laboratory of Fish Biology, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi, 464-8601, Japan
| | - Yoshitaka Sakakura
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Nagasaki, 852-8521, Japan
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8
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Brewer KM, Engle SE, Bansal R, Brewer KK, Jasso KR, McIntyre JC, Vaisse C, Reiter JF, Berbari NF. Physiological Condition-Dependent Changes in Ciliary GPCR Localization in the Brain. eNeuro 2023; 10:ENEURO.0360-22.2023. [PMID: 36849261 PMCID: PMC10012409 DOI: 10.1523/eneuro.0360-22.2023] [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] [Received: 09/06/2022] [Revised: 01/21/2023] [Accepted: 01/29/2023] [Indexed: 03/01/2023] Open
Abstract
Primary cilia are cellular appendages critical for diverse types of Signaling. They are found on most cell types, including cells throughout the CNS. Cilia preferentially localize certain G-protein-coupled receptors (GPCRs) and are critical for mediating the signaling of these receptors. Several of these neuronal GPCRs have recognized roles in feeding behavior and energy homeostasis. Cell and model systems, such as Caenorhabditis elegans and Chlamydomonas, have implicated both dynamic GPCR cilia localization and cilia length and shape changes as key for signaling. It is unclear whether mammalian ciliary GPCRs use similar mechanisms in vivo and under what conditions these processes may occur. Here, we assess two neuronal cilia GPCRs, melanin-concentrating hormone receptor 1 (MCHR1) and neuropeptide-Y receptor 2 (NPY2R), as mammalian model ciliary receptors in the mouse brain. We test the hypothesis that dynamic localization to cilia occurs under physiological conditions associated with these GPCR functions. Both receptors are involved in feeding behaviors, and MCHR1 is also associated with sleep and reward. Cilia were analyzed with a computer-assisted approach allowing for unbiased and high-throughput analysis. We measured cilia frequency, length, and receptor occupancy. We observed changes in ciliary length, receptor occupancy, and cilia frequency under different conditions for one receptor but not another and in specific brain regions. These data suggest that dynamic cilia localization of GPCRs depends on properties of individual receptors and cells where they are expressed. A better understanding of subcellular localization dynamics of ciliary GPCRs could reveal unknown molecular mechanisms regulating behaviors like feeding.
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Affiliation(s)
- Kathryn M Brewer
- Department of Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202
| | - Staci E Engle
- Department of Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202
| | - Ruchi Bansal
- Department of Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202
| | - Katlyn K Brewer
- Department of Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202
| | - Kalene R Jasso
- Department of Neuroscience and Center for Smell and Taste, University of Florida, Gainesville, Florida 32603
| | - Jeremy C McIntyre
- Department of Neuroscience and Center for Smell and Taste, University of Florida, Gainesville, Florida 32603
| | - Christian Vaisse
- Diabetes Center and Department of Medicine, University of California San Francisco, San Francisco, California 94143
| | - Jeremy F Reiter
- Department of Biochemistry and Biophysics, Cardiovascular Research Institute, University of California, San Francisco, San Francisco, California 94158
| | - Nicolas F Berbari
- Department of Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202
- Stark Neurosciences Research Institute, Indiana University, Indianapolis, Indiana 46202
- Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, Indiana 46202
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9
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Liu Y, Gu R, Gao M, Wei Y, Shi Y, Wang X, Gu Y, Gu X, Zhang H. Emerging role of substance and energy metabolism associated with neuroendocrine regulation in tumor cells. Front Endocrinol (Lausanne) 2023; 14:1126271. [PMID: 37051193 PMCID: PMC10084767 DOI: 10.3389/fendo.2023.1126271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 02/07/2023] [Indexed: 03/29/2023] Open
Abstract
Cancer is the second most common cause of mortality in the world. One of the unresolved difficult pathological mechanism issues in malignant tumors is the imbalance of substance and energy metabolism of tumor cells. Cells maintain life through energy metabolism, and normal cells provide energy through mitochondrial oxidative phosphorylation to generate ATP, while tumor cells demonstrate different energy metabolism. Neuroendocrine control is crucial for tumor cells' consumption of nutrients and energy. As a result, better combinatorial therapeutic approaches will be made possible by knowing the neuroendocrine regulating mechanism of how the neuroendocrine system can fuel cellular metabolism. Here, the basics of metabolic remodeling in tumor cells for nutrients and metabolites are presented, showing how the neuroendocrine system regulates substance and energy metabolic pathways to satisfy tumor cell proliferation and survival requirements. In this context, targeting neuroendocrine regulatory pathways in tumor cell metabolism can beneficially enhance or temper tumor cell metabolism and serve as promising alternatives to available treatments.
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Affiliation(s)
- Yingying Liu
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China
- School of Chinese Medicine and School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Renjun Gu
- School of Chinese Medicine and School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Murong Gao
- Beijing Rehabilitation Hospital Affiliated to Capital Medical University, Beijing, China
| | - Yangwa Wei
- Department of Hepatobiliary Surgery, Hainan Provincial People’s Hospital, Haikou, China
| | - Yu Shi
- Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xu Wang
- School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Yihuang Gu
- School of Acupuncture and Tuina, School of Regimen and Rehabilitation, Nanjing University of Chinese Medicine, Nanjing, China
- The Second Hospital of Nanjing, Nanjing, China
- *Correspondence: Hongru Zhang, ; Xin Gu, ; Yihuang Gu,
| | - Xin Gu
- School of Chinese Medicine and School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- *Correspondence: Hongru Zhang, ; Xin Gu, ; Yihuang Gu,
| | - Hongru Zhang
- School of Chinese Medicine and School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- *Correspondence: Hongru Zhang, ; Xin Gu, ; Yihuang Gu,
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10
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Kumbar J, Ganesh CB. Organization of the Melanin concentrating hormone secreting neuronal system in the brain of the cichlid fish Oreochromis mossambicus. J Chem Neuroanat 2022; 124:102141. [PMID: 35907561 DOI: 10.1016/j.jchemneu.2022.102141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 07/12/2022] [Accepted: 07/25/2022] [Indexed: 11/15/2022]
Abstract
Melanin concentrating hormone (MCH) is a highly conserved cyclic peptide present in vertebrates. In this study, we describe the organization of MCH-immunoreactive (MCH-ir) cells and fibres in different regions of the brain in the cichlid fish Oreochromis mossambicus. Only MCH-ir fibres were observed in dorsal and ventral subdivisions of the telencephalon, the preoptic area and magnocellular and parvocellular divisions of the nucleus preopticus, and in hypothalamic areas such as the suprachiasmatic nucleus and tuberal area. Distinctly labelled MCH-ir perikarya were observed in the paraventricular organ, lateral and medial subdivisions of the nucleus lateralis tuberis, nucleus recessus lateralis and in the nucleus posterioris tuberis. The pituitary gland showed MCH-ir fibres in the proximal pars distalis, neurohypophyseal ramifications and in pars intermedia where the dark accumulations of MCH-ir content corresponded to enlarged axon terminals. In the diencephalon, MCH-ir fibres were also labelled in the pretectal area, thalamic nuclei and preglomerular complex. In the midbrain tegmentum, a cluster of MCH-ir neurons was detected in the dorsal tegmental nucleus, whereas MCH-ir fibres were distributed in the torus semicircularis and optic tectum. In the rhombencephalon, MCH-ir fibres were located in the nucleus lateralis valvulae, cerebellum and secondary gustatory nucleus. Overall, the widespread distribution of MCH-ir cells and fibres in the brain suggests diverse roles for MCH such as regulation of sensorimotor and neuroendocrine functions in the tilapia.
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Affiliation(s)
- Jyoti Kumbar
- Neuroendocrinology Research Laboratory, Department of Studies in Zoology, Karnatak University, Dharwad-580 003 India
| | - C B Ganesh
- Neuroendocrinology Research Laboratory, Department of Studies in Zoology, Karnatak University, Dharwad-580 003 India.
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11
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Janković SM, Đešević M. Advancements in neuroactive peptides in seizures. Expert Rev Neurother 2022; 22:129-143. [DOI: 10.1080/14737175.2022.2031983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Slobodan M. Janković
- - University of Kragujevac, Faculty of Medical Sciences, Kragujevac, Serbia
- University Clinical Center, Kragujevac, Serbia
| | - Miralem Đešević
- - Private Policlinic Center Eurofarm Sarajevo, Cardiology Department, Sarajevo, Bosnia and Herzegovina
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12
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Bertolesi GE, Debnath N, Malik HR, Man LLH, McFarlane S. Type II Opsins in the Eye, the Pineal Complex and the Skin of Xenopus laevis: Using Changes in Skin Pigmentation as a Readout of Visual and Circadian Activity. Front Neuroanat 2022; 15:784478. [PMID: 35126061 PMCID: PMC8814574 DOI: 10.3389/fnana.2021.784478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 12/13/2021] [Indexed: 01/17/2023] Open
Abstract
The eye, the pineal complex and the skin are important photosensitive organs. The African clawed frog, Xenopus laevis, senses light from the environment and adjusts skin color accordingly. For example, light reflected from the surface induces camouflage through background adaptation while light from above produces circadian variation in skin pigmentation. During embryogenesis, background adaptation, and circadian skin variation are segregated responses regulated by the secretion of α-melanocyte-stimulating hormone (α-MSH) and melatonin through the photosensitivity of the eye and pineal complex, respectively. Changes in the color of skin pigmentation have been used as a readout of biochemical and physiological processes since the initial purification of pineal melatonin from pigs, and more recently have been employed to better understand the neuroendocrine circuit that regulates background adaptation. The identification of 37 type II opsin genes in the genome of the allotetraploid X. laevis, combined with analysis of their expression in the eye, pineal complex and skin, is contributing to the elucidation of the role of opsins in the different photosensitive organs, but also brings new questions and challenges. In this review, we analyze new findings regarding the anatomical localization and functions of type II opsins in sensing light. The contribution of X. laevis in revealing the neuroendocrine circuits that regulate background adaptation and circadian light variation through changes in skin pigmentation is discussed. Finally, the presence of opsins in X. laevis skin melanophores is presented and compared with the secretory melanocytes of birds and mammals.
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Affiliation(s)
- Gabriel E. Bertolesi
- Department of Cell Biology and Anatomy, Hotchkiss Brain Institute and Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, AB, Canada
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Shinohara Y, Kasagi S, Amiya N, Hoshino Y, Ishii R, Hyodo N, Yamaguchi H, Sato S, Amano M, Takahashi A, Mizusawa K. Taisho-Sanshoku koi have hardly faded skin and show attenuated melanophore sensitivity to adrenaline and melanin-concentrating hormone. Front Endocrinol (Lausanne) 2022; 13:994060. [PMID: 36619537 PMCID: PMC9813866 DOI: 10.3389/fendo.2022.994060] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
INTRODUCTION Koi carp, an ornamental fish derived from the common carp Cyprinus carpio (CC), is characterized by beautiful skin color patterns. However, the mechanism that gives rise to the characteristic vivid skin coloration of koi carp has not been clarified. The skin coloration of many teleosts changes in response to differences in the background color. This change in skin coloration is caused by diffusion or aggregation of pigment granules in chromatophores and is regulated mainly by sympathetic nerves and hormones. We hypothesized that there would be some abnormality in the mechanism of skin color regulation in koi carp, which impairs skin color fading in response to background color. METHODS We compared the function of melanin-concentrating hormone (MCH), noradrenaline, and adrenaline in CC and Taisho-Sanshoku (TS), a variety of tri-colored koi. RESULTS AND DISCUSSION In CC acclimated to a white background, the skin color became paler and pigment granules aggregated in melanophores in the scales compared to that in black-acclimated CC. There were no clear differences in skin color or pigment granule aggregation in white- or black-acclimated TS. The expression of mch1 mRNA in the brain was higher in the white-acclimated CC than that in the black-acclimated CC. However, the expression of mch1 mRNA in the brain in the TS did not change in response to the background color. Additionally, plasma MCH levels did not differ between white- and black-acclimated fish in either CC or TS. In vitro experiments showed that noradrenaline induced pigment aggregation in scale melanophores in both CC and TS, whereas adrenaline induced pigment aggregation in the CC but not in the TS. In vitro administration of MCH induced pigment granule aggregation in the CC but not in the TS. However, intraperitoneal injection of MCH resulted in pigment granule aggregation in both CC and TS. Collectively, these results suggest that the weak sensitivity of scale melanophores to MCH and adrenaline might be responsible for the lack of skin color change in response to background color in the TS.
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Affiliation(s)
- Yukari Shinohara
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Satoshi Kasagi
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Noriko Amiya
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Yukihiro Hoshino
- Niigata Prefectural Inland Water Fisheries Experiment Station, Ogawaramachi, Nagaoka, Niigata, Japan
| | - Ryo Ishii
- Niigata Prefectural Inland Water Fisheries Experiment Station, Ogawaramachi, Nagaoka, Niigata, Japan
| | - Noriyuki Hyodo
- Niigata Prefectural Inland Water Fisheries Experiment Station, Ogawaramachi, Nagaoka, Niigata, Japan
| | - Hiroaki Yamaguchi
- Niigata Prefectural Inland Water Fisheries Experiment Station, Ogawaramachi, Nagaoka, Niigata, Japan
| | - Shoh Sato
- Niigata Prefectural Inland Water Fisheries Experiment Station, Ogawaramachi, Nagaoka, Niigata, Japan
| | - Masafumi Amano
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Akiyoshi Takahashi
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Kanta Mizusawa
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, Japan
- *Correspondence: Kanta Mizusawa,
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Yang T, Kasagi S, Takahashi A, Mizusawa K. Effects of background color and feeding status on the expression of genes associated with body color regulation in the goldfish Carassius auratus. Gen Comp Endocrinol 2021; 312:113860. [PMID: 34302844 DOI: 10.1016/j.ygcen.2021.113860] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 07/05/2021] [Accepted: 07/17/2021] [Indexed: 10/20/2022]
Abstract
Alpha-melanocyte-stimulating hormone (α-MSH), a peptide derived from proopiomelanocortin (POMC), and melanin-concentrating hormone (MCH), act as neuromodulators and regulate food intake in vertebrates. In teleosts, these peptides are also involved competitively in body color regulation; α-MSH induces a dark body color, while MCH induces a pale body color. Similarly, members of the growth hormone (GH) family, somatolactin (SL) and prolactin (PRL), which are involved in the regulation of energy metabolism, are also associated with body color regulation in teleosts. Since these hormones are involved in both body color regulation and energy metabolism, it is possible that feeding status can affect body color. Here, we examined the effects of fasting on the response of goldfish body coloration to changes in background color. Goldfish were acclimated for one week in tanks with a white or black background under conditions of periodic feeding or fasting. The results showed that body color and expression levels of pmch1 and pomc were affected by background color, irrespective of feeding status. Expression levels of sla were higher in fish maintained in tanks with a black background than in tanks with a white background, and higher in the fasted fish compared to the fed fish. However, the pattern of slb expression was almost the opposite of that observed in sla expression. The expression levels of gh and prl in the pituitary, and pmch2a and pmch2b in the brain, were not affected by background color. These results suggest that MCH, α-MSH, SLα, and SLβ might be involved in body color regulation and that they are affected by background color in goldfish. The results also suggest that feeding status may affect body color regulation via SLα and SLβ, although these effects might be limited compared to the effect of background color.
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Affiliation(s)
- Tingshu Yang
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa 252-0373, Japan
| | - Satoshi Kasagi
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa 252-0373, Japan
| | - Akiyoshi Takahashi
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa 252-0373, Japan
| | - Kanta Mizusawa
- School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa 252-0373, Japan.
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15
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Kobayashi Y, Tomoshige S, Imakado K, Sekino Y, Koganezawa N, Shirao T, Diniz GB, Miyamoto T, Saito Y. Ciliary GPCR-based transcriptome as a key regulator of cilia length control. FASEB Bioadv 2021; 3:744-767. [PMID: 34485842 PMCID: PMC8409570 DOI: 10.1096/fba.2021-00029] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 06/08/2021] [Accepted: 06/14/2021] [Indexed: 12/28/2022] Open
Abstract
The primary cilium is a plasma membrane-protruding sensory organelle that efficiently conveys signaling cascades in a highly ordered microenvironment. Its signaling is mediated, in part, by a limited set of GPCRs preferentially enriched in the cilium membrane. This includes melanin-concentrating hormone (MCH) receptor 1 (MCHR1), which plays a role in feeding and mood. In addition to its receptor composition, the length of the cilium is a characteristic parameter that is implicated in its function. We previously found that MCH can dynamically shorten cilia length via the Gi/o and Akt pathways in both MCHR1-expressing hTERT-RPE1 cells (hRPE1 cells) and rat hippocampal neurons. However, the detailed mechanisms by which MCH regulates cilia length through ciliary MCHR1 remains unclear. In this study, we aimed to determine the transcriptome changes in MCHR1-expressing hRPE1 cells in response to MCH to identify the target molecules involved in cilia length regulation via MCHR1 activation. RNA sequencing analysis of ciliated cells subjected to MCH treatment showed upregulation of 424 genes and downregulation of 112 genes compared with static control cells. Validation by quantitative real-time PCR, knocking down, and CRISPR/Cas9-mediated knockout technology identified a molecule, PDZ and LIM domain-containing protein 5 (PDLIM5). Thus, it was considered as the most significant key factor for MCHR1-mediated shortening of cilia length. Additional analyses revealed that the actin-binding protein alpha-actinin 1/4 is a crucial downstream target of the PDLIM5 signaling pathway that exerts an effect on MCHR1-induced cilia shortening. In the endogenous MCHR1-expressing hippocampus, transcriptional upregulation of PDLIM5 and actinin 1/4, following the application of MCH, was detected when the MCHR1-positive cilia were shortened. Together, our transcriptome study based on ciliary MCHR1 function uncovered a novel and important regulatory step underlying cilia length control. These results will potentially serve as a basis for understanding the mechanism underlying the development of obesity and mood disorders.
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Affiliation(s)
- Yuki Kobayashi
- Graduate School of Integrated Sciences for LifeHiroshima UniversityHiroshimaJapan
| | - Sakura Tomoshige
- Graduate School of Integrated Sciences for LifeHiroshima UniversityHiroshimaJapan
| | - Kosuke Imakado
- Graduate School of Integrated Sciences for LifeHiroshima UniversityHiroshimaJapan
| | - Yuko Sekino
- Endowed Laboratory of Human Cell‐Based Drug DiscoveryGraduate School of Pharmaceutical SciencesThe University of TokyoTokyoJapan
| | - Noriko Koganezawa
- Department of Neurobiology and BehaviorGraduate School of MedicineGunma UniversityMaebashiJapan
| | - Tomoaki Shirao
- Department of Neurobiology and BehaviorGraduate School of MedicineGunma UniversityMaebashiJapan
- AlzMed, Inc.TokyoJapan
| | - Giovanne B. Diniz
- California National Primate Research CenterUniversity of CaliforniaDavisCAUSA
| | - Tatsuo Miyamoto
- Department of Genetics and Cell BiologyResearch Institute for Radiation Biology and MedicineHiroshima UniversityHiroshimaJapan
| | - Yumiko Saito
- Graduate School of Integrated Sciences for LifeHiroshima UniversityHiroshimaJapan
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Ruiz-Viroga V, Urbanavicius J, Torterolo P, Lagos P. In vivo uptake of a fluorescent conjugate of melanin-concentrating hormone in the rat brain. J Chem Neuroanat 2021; 114:101959. [PMID: 33848617 DOI: 10.1016/j.jchemneu.2021.101959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 04/03/2021] [Accepted: 04/08/2021] [Indexed: 11/16/2022]
Abstract
Melanin-concentrating hormone (MCH) is a hypothalamic neuropeptide synthesized by posterior hypothalamic and incerto-hypothalamic neurons that project throughout the central nervous system. The MCHergic system modulates several important functions such as feeding behavior, mood and sleep. MCH exerts its biological functions through interaction with the MCHR-1 receptor, the only functional receptor present in rodents. The internalization process of MCHR-1 triggered by MCH binding was described in vitro in non-neuronal heterologous systems with over-expression of MCHR-1. Reports of in vivo MCHR-1 internalization dynamics are scarce, however, this is an important process to explore based on the critical functions of the MCHergic system. We had previously determined that 60 min after intracerebroventricular (i.c.v.) microinjections of MCH conjugated with fluorophore rhodamine (R-MCH), the dorsal and median raphe nucleus presented R-MCH positive labeled neurons. In the present work, we further studied the in vivo uptake process focusing on the distribution and time-dependent pattern of R-MCH positive cells 10, 20 and 60 min (T10, T20 and T60, respectively) after i.c.v. microinjection of R-MCH. We also explored this uptake process to see whether it was receptor- and clathrin-dependent and examined the phenotype of R-MCH positive cells and their proximity to MCHergic fibers. We found a great number of R-MCH positive cells with high fluorescence intensity in the lateral septum, nucleus accumbens and hippocampus at T20 and T60 (but not at T10), while a lower number with low intensity was observed in the dorsal raphe nucleus. At T20, in rats pre-treated with a MCHR-1 antagonist (ATC-0175) or with phenylarsine oxide (PAO), a clathrin endocytosis inhibitor, a robust decrease (> 50 %) of R-MCH uptake occurred in these structures. The R-MCH positive cells were identified as neurons (NeuN positive, GFAP negative) and some MCHergic fibers run in the vicinities of them. We concluded that neurons localized at structures that were close to the ventricular surfaces could uptake R-MCH in vivo through a receptor-dependent and clathrin-mediated process. Our results support volume transmission of MCH through the cerebrospinal fluid to reach distant targets. Finally, we propose that R-MCH would be an effective tool to study MCH-uptake in vivo.
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Affiliation(s)
- Vicente Ruiz-Viroga
- Departamento de Fisiología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Jessika Urbanavicius
- Departamento de Neurofarmacología Experimental, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
| | - Pablo Torterolo
- Departamento de Fisiología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Patricia Lagos
- Departamento de Fisiología, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.
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MCH-R1 Antagonist GPS18169, a Pseudopeptide, Is a Peripheral Anti-Obesity Agent in Mice. Molecules 2021; 26:molecules26051291. [PMID: 33673598 PMCID: PMC7957705 DOI: 10.3390/molecules26051291] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/17/2021] [Accepted: 02/22/2021] [Indexed: 01/01/2023] Open
Abstract
Melanin-concentrating hormone (MCH) is a 19 amino acid long peptide found in the brain of animals, including fishes, batrachians, and mammals. MCH is implicated in appetite and/or energy homeostasis. Antagonists at its receptor (MCH-R1) could be major tools (or ultimately drugs) to understand the mechanism of MCH action and to fight the obesity syndrome that is a worldwide societal health problem. Ever since the deorphanisation of the MCH receptor, we cloned, expressed, and characterized the receptor MCH-R1 and started a vast medicinal chemistry program aiming at the discovery of such usable compounds. In the present final work, we describe GPS18169, a pseudopeptide antagonist at the MCH-R1 receptor with an affinity in the nanomolar range and a Ki for its antagonistic effect in the 20 picomolar range. Its metabolic stability is rather ameliorated compared to its initial parent compound, the antagonist S38151. We tested it in an in vivo experiment using high diet mice. GPS18169 was found to be active in limiting the accumulation of adipose tissues and, correlatively, we observed a normalization of the insulin level in the treated animals, while no change in food or water consumption was observed.
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Li LL, Ma SK, Peng W, Fang YG, Duo HR, Fu HY, Jia GX. Genetic diversity and population structure of Tibetan sheep breeds determined by whole genome resequencing. Trop Anim Health Prod 2021; 53:174. [PMID: 33611716 DOI: 10.1007/s11250-021-02605-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 02/08/2021] [Indexed: 12/01/2022]
Abstract
Tibetan sheep is one of primitive Chinese sheep breeds, which achieved the divergence about 2500 years ago in Qinghai plateau region. According to different geographic conditions, especially altitudes, Tibetan sheep evolved into different breeds. In this study, we performed whole genome resequencing of 5 representative Tibetan sheep breeds. Comparative genomic analysis showed that they can be divided into different clades with a close genetic relationship. However, some genes with common selective regions were enriched for hypoxic adaptability in different breeds living at higher altitude, including GHR, BMP15, and CPLANE1. Furthermore, breed-specific selective regions about physical characteristics, especially wool growth, were found in genes such as BSND, USP24, NCAPG, and LCORL. This study could contribute to our understanding about trait formation and offer a reference for breeding of Tibetan sheep.
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Affiliation(s)
- Lei-Lei Li
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Shi-Ke Ma
- Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining, 810016, China
| | - Wei Peng
- Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining, 810016, China
| | - You-Gui Fang
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Qinghai Key Laboratory of Animal Ecological Genomics, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810001, China
| | - Hai-Rui Duo
- School of Geography Science, Qinghai Normal University, Xining, 810016, China
| | - Hong-Yun Fu
- Qinghai Headquarter of Animal Husbandry Extension Station, Xining, 810008, China
| | - Gong-Xue Jia
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Qinghai Key Laboratory of Animal Ecological Genomics, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810001, China.
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Salient brain entities labelled in P2rx7-EGFP reporter mouse embryos include the septum, roof plate glial specializations and circumventricular ependymal organs. Brain Struct Funct 2021; 226:715-741. [PMID: 33427974 PMCID: PMC7981336 DOI: 10.1007/s00429-020-02204-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 12/16/2020] [Indexed: 02/08/2023]
Abstract
The purinergic system is one of the oldest cell-to-cell communication mechanisms and exhibits relevant functions in the regulation of the central nervous system (CNS) development. Amongst the components of the purinergic system, the ionotropic P2X7 receptor (P2X7R) stands out as a potential regulator of brain pathology and physiology. Thus, P2X7R is known to regulate crucial aspects of neuronal cell biology, including axonal elongation, path-finding, synapse formation and neuroprotection. Moreover, P2X7R modulates neuroinflammation and is posed as a therapeutic target in inflammatory, oncogenic and degenerative disorders. However, the lack of reliable technical and pharmacological approaches to detect this receptor represents a major hurdle in its study. Here, we took advantage of the P2rx7-EGFP reporter mouse, which expresses enhanced green fluorescence protein (EGFP) immediately downstream of the P2rx7 proximal promoter, to conduct a detailed study of its distribution. We performed a comprehensive analysis of the pattern of P2X7R expression in the brain of E18.5 mouse embryos revealing interesting areas within the CNS. Particularly, strong labelling was found in the septum, as well as along the entire neural roof plate zone of the brain, except chorioidal roof areas, but including specialized circumventricular roof formations, such as the subfornical and subcommissural organs (SFO; SCO). Moreover, our results reveal what seems a novel circumventricular organ, named by us postarcuate organ (PArcO). Furthermore, this study sheds light on the ongoing debate regarding the specific presence of P2X7R in neurons and may be of interest for the elucidation of additional roles of P2X7R in the idiosyncratic histologic development of the CNS and related systemic functions.
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Bertolesi GE, McFarlane S. Melanin-concentrating hormone like and somatolactin. A teleost-specific hypothalamic-hypophyseal axis system linking physiological and morphological pigmentation. Pigment Cell Melanoma Res 2020; 34:564-574. [PMID: 32898924 DOI: 10.1111/pcmr.12924] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 08/12/2020] [Accepted: 09/02/2020] [Indexed: 12/26/2022]
Abstract
Plastic adaptation to match the skin colour to the surrounding is key to survival. Two biological responses in skin colour are associated with background adaptation. A fast "physiological response" that aggregates/disperses the pigment organelles of skin chromatophores, and a slow "morphological response" that alters the type and/or density of pigment cells in the skin. Both responses are linked by unknown mechanisms. In this review, we discuss the role in skin colour regulation of two molecules that form part of a hypothalamic-hypophyseal pathway unique to teleosts, melanin-concentrating hormone "like" (MCHL) (previously known as MCH), and somatolactin. MCHL neurons project to the neurohypophysis and to the pars intermedia pituitary, where they interact with somatolactin-expressing cells. With a white background MCHL is released into the circulation to induce rapid melanosome aggregation and skin lightening. Somatolactin is also a fish-specific peptide whose expression and secretion are altered in organisms adapted chronically to white/black backgrounds, and that regulates morphological pigmentation. We discuss the evidence for a model whereby in teleosts, MCHL and somatolactin provide the previously unknown link between physiological and morphological pigmentation.
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Affiliation(s)
- Gabriel E Bertolesi
- Department of Cell Biology and Anatomy, Hotchkiss Brain Institute, Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Sarah McFarlane
- Department of Cell Biology and Anatomy, Hotchkiss Brain Institute, Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
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21
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Kobayashi Y. New perspectives on GPCRs: GPCR heterodimer formation (melanocortin receptor) and GPCR on primary cilia (melanin concentrating hormone receptor). Gen Comp Endocrinol 2020; 293:113474. [PMID: 32240710 DOI: 10.1016/j.ygcen.2020.113474] [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: 12/19/2019] [Revised: 03/18/2020] [Accepted: 03/28/2020] [Indexed: 11/13/2022]
Abstract
GPCRs are the largest family of receptors accounting for about 30% of the current drug targets. However, it is difficult to fully elucidate the mechanisms regulating intracellular GPCR signal regulation. It is thus important to consider and investigate GPCRs with respect to endogenous situations. Our group has been investigating GPCRs involved in body color (teleost and amphibian) and eating (vertebrate). Here, I review two independent GPCR systems (heterodimer formation and primary ciliated GPCR) that can be breakthroughs in GPCR research. In teleosts, MCRs form heterodimers, which significantly reduce their affinity for acetylated ligands. In mammals, MCHR1 is localized in the ciliary membrane and shortens the length of the primary cilia through a unique signal from the ciliary membrane. Considering these two new GPCR concepts is expected to advance the overall view of the GPCR system.
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Affiliation(s)
- Yuki Kobayashi
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8521, Japan.
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Battagello DS, Lorenzon AR, Diniz GB, Motta-Teixeira LC, Klein MO, Ferreira JGP, Arias CM, Adamantidis A, Sita LV, Cipolla-Neto J, Bevilacqua EMAF, Sawchenko PE, Bittencourt JC. The Rat Mammary Gland as a Novel Site of Expression of Melanin-Concentrating Hormone Receptor 1 mRNA and Its Protein Immunoreactivity. Front Endocrinol (Lausanne) 2020; 11:463. [PMID: 32849267 PMCID: PMC7411258 DOI: 10.3389/fendo.2020.00463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Accepted: 06/12/2020] [Indexed: 11/24/2022] Open
Abstract
Lactation is a complex physiological process, depending on orchestrated central and peripheral events, including substantial brain plasticity. Among these events is a novel expression of pro-melanin-concentrating hormone (Pmch) mRNA in the rodent hypothalamus, such as the ventral part of the medial preoptic area (vmMPOA). This expression reaches its highest levels around postpartum day 19 (PPD19), when dams transition from lactation to the weaning period. The appearance of this lactation-related Pmch expression occurs simultaneously with the presence of one of the Pmch products, melanin-concentrating hormone (MCH), in the serum. Given the relevance of the MPOA to maternal physiology and the contemporaneity between Pmch expression in this structure and the weaning period, we hypothesized that MCH has a role in the termination of lactation, acting as a mediator between central and peripheral changes. To test this, we investigated the presence of the MCH receptor 1 (MCHR1) and its gene expression in the mammary gland of female rats in different stages of the reproductive cycle. To that end, in situ hybridization, RT-PCR, RT-qPCR, nucleotide sequencing, immunohistochemistry, and Western blotting were employed. Although Mchr1 expression was detected in the epidermis and dermis of both diestrus and lactating rats, parenchymal expression was exclusively found in the functional mammary gland of lactating rats. The expression of Mchr1 mRNA oscillated through the lactation period and reached its maximum in PPD19 dams. Presence of MCHR1 was confirmed with immunohistochemistry with preferential location of MCHR1 immunoreactive cells in the alveolar secretory cells. As was the case for gene expression, the MCHR1 protein levels were significantly higher in PPD19 than in other groups. Our data demonstrate the presence of an anatomical basis for the participation of MCH peptidergic system on the control of lactation through the mammary gland, suggesting that MCH could modulate a prolactation action in early postpartum days and the opposite role at the end of the lactation.
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Affiliation(s)
- Daniella S. Battagello
- Instituto de Psicologia, Nucleo de Neurociencias e Comportamento, Universidade de São Paulo, São Paulo, Brazil
- Instituto de Ciencias Biomedicas, Laboratorio de Neuroanatomia Quimica, Universidade de São Paulo, São Paulo, Brazil
| | - Aline R. Lorenzon
- Departmento de Biologia Celular e Do Desenvolvimento, Instituto de Ciencias Biomedicas, Universidade de São Paulo, São Paulo, Brazil
| | - Giovanne B. Diniz
- Instituto de Ciencias Biomedicas, Laboratorio de Neuroanatomia Quimica, Universidade de São Paulo, São Paulo, Brazil
| | - Lívia C. Motta-Teixeira
- Departmento de Fisiologia e Biofisica, Instituto de Ciencias Biomedicas, Universidade de São Paulo, São Paulo, Brazil
| | - Marianne O. Klein
- Instituto de Ciencias Biomedicas, Laboratorio de Neuroanatomia Quimica, Universidade de São Paulo, São Paulo, Brazil
| | - Jozélia G. P. Ferreira
- Instituto de Ciencias Biomedicas, Laboratorio de Neuroanatomia Quimica, Universidade de São Paulo, São Paulo, Brazil
| | - Carlos M. Arias
- Laboratory of Neuronal Structure and Function, The Salk Institute for Biological Studies, La Jolla, CA, United States
| | | | - Luciane V. Sita
- Instituto de Ciencias Biomedicas, Laboratorio de Neuroanatomia Quimica, Universidade de São Paulo, São Paulo, Brazil
| | - José Cipolla-Neto
- Departmento de Fisiologia e Biofisica, Instituto de Ciencias Biomedicas, Universidade de São Paulo, São Paulo, Brazil
| | - Estela M. A. F. Bevilacqua
- Departmento de Biologia Celular e Do Desenvolvimento, Instituto de Ciencias Biomedicas, Universidade de São Paulo, São Paulo, Brazil
| | - Paul E. Sawchenko
- Laboratory of Neuronal Structure and Function, The Salk Institute for Biological Studies, La Jolla, CA, United States
| | - Jackson C. Bittencourt
- Instituto de Psicologia, Nucleo de Neurociencias e Comportamento, Universidade de São Paulo, São Paulo, Brazil
- Instituto de Ciencias Biomedicas, Laboratorio de Neuroanatomia Quimica, Universidade de São Paulo, São Paulo, Brazil
- *Correspondence: Jackson C. Bittencourt
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