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Zhou H, Zhu R, Xia Y, Zhang X, Wang Z, Lorimer GH, Ghiladi RA, Bayram H, Wang J. Neuropeptides affecting social behavior in mammals: Oxytocin. Peptides 2024; 177:171223. [PMID: 38626843 DOI: 10.1016/j.peptides.2024.171223] [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: 01/23/2024] [Revised: 03/24/2024] [Accepted: 04/13/2024] [Indexed: 04/30/2024]
Abstract
Oxytocin (OXT), a neuropeptide consisting of only nine amino acids, is synthesized in the paraventricular and supraoptic nuclei of the hypothalamus. Although OXT is best known for its role in lactation and parturition, recent research has shown that it also has a significant impact on social behaviors in mammals. However, a comprehensive review of this topic is still lacking. In this paper, we systematically reviewed the effects of OXT on social behavior in mammals. These effects of OXT from the perspective of five key behavioral dimensions were summarized: parental behavior, anxiety, aggression, attachment, and empathy. To date, researchers have agreed that OXT plays a positive regulatory role in a wide range of social behaviors, but there have been controversially reported results. In this review, we have provided a detailed panorama of the role of OXT in social behavior and, for the first time, delved into the underlying regulatory mechanisms, which may help better understand the multifaceted role of OXT. Levels of OXT in previous human studies were also summarized to provide insights for diagnosis of mental disorders.
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Affiliation(s)
- Hong Zhou
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan, Hubei 430068, China; International Center for Redox Biology & Precision Medicine of Hubei Province, Hubei University of Technology, Wuhan, Hubei 430068, China; National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan, Hubei 430068, China
| | - Rui Zhu
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan, Hubei 430068, China; International Center for Redox Biology & Precision Medicine of Hubei Province, Hubei University of Technology, Wuhan, Hubei 430068, China; National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan, Hubei 430068, China
| | - Yuqing Xia
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan, Hubei 430068, China; International Center for Redox Biology & Precision Medicine of Hubei Province, Hubei University of Technology, Wuhan, Hubei 430068, China; National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan, Hubei 430068, China
| | - Xinming Zhang
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan, Hubei 430068, China; International Center for Redox Biology & Precision Medicine of Hubei Province, Hubei University of Technology, Wuhan, Hubei 430068, China; National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan, Hubei 430068, China
| | - Zixu Wang
- National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan, Hubei 430068, China
| | | | - Reza A Ghiladi
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA
| | - Hasan Bayram
- Department of Pulmonary Medicine, Koç University School of Medicine, Istanbul 34450, Turkey
| | - Jun Wang
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan, Hubei 430068, China; International Center for Redox Biology & Precision Medicine of Hubei Province, Hubei University of Technology, Wuhan, Hubei 430068, China; National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan, Hubei 430068, China.
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Dudas A, Nakahara TS, Pellissier LP, Chamero P. Parenting behaviors in mice: Olfactory mechanisms and features in models of autism spectrum disorders. Neurosci Biobehav Rev 2024; 161:105686. [PMID: 38657845 DOI: 10.1016/j.neubiorev.2024.105686] [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: 11/30/2023] [Revised: 03/24/2024] [Accepted: 04/20/2024] [Indexed: 04/26/2024]
Abstract
Rodents, along with numerous other mammals, heavily depend on olfactory cues to navigate their social interactions. Processing of olfactory sensory inputs is mediated by conserved brain circuits that ultimately trigger social behaviors, such as social interactions and parental care. Although innate, parenting is influenced by internal states, social experience, genetics, and the environment, and any significant disruption of these factors can impact the social circuits. Here, we review the molecular mechanisms and social circuits from the olfactory epithelium to central processing that initiate parental behaviors and their dysregulations that may contribute to the social impairments in mouse models of autism spectrum disorders (ASD). We discuss recent advances of the crucial role of olfaction in parental care, its consequences for social interactions, and the reciprocal influence on social interaction impairments in mouse models of ASD.
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Affiliation(s)
- Ana Dudas
- Team biology of GPCR Signaling systems (BIOS), CNRS, INRAE, University of Tours, PRC, Nouzilly F-37380, France
| | - Thiago S Nakahara
- Team Neuroendocrine Integration of Reproduction and Behavior (INERC), CNRS, INRAE, University of Tours, PRC, Nouzilly F-37380, France
| | - Lucie P Pellissier
- Team biology of GPCR Signaling systems (BIOS), CNRS, INRAE, University of Tours, PRC, Nouzilly F-37380, France.
| | - Pablo Chamero
- Team Neuroendocrine Integration of Reproduction and Behavior (INERC), CNRS, INRAE, University of Tours, PRC, Nouzilly F-37380, France.
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Gerasimenko M, Higashida H. Remission of social behavior impairment by oral administration of a precursor of NAD in CD157, but not in CD38, knockout mice. Front Immunol 2023; 14:1166609. [PMID: 37215105 PMCID: PMC10192747 DOI: 10.3389/fimmu.2023.1166609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 04/18/2023] [Indexed: 05/24/2023] Open
Abstract
Nicotinamide adenine dinucleotide (NAD) is a substrate of adenosine diphosphate (ADP)-ribosyl cyclase and is catalyzed to cyclic ADP-ribose (cADPR) by CD38 and/or CD157. cADPR, a Ca2+ mobilizing second messenger, is critical in releasing oxytocin from the hypothalamus into the brain. Although NAD precursors effectively play a role in neurodegenerative disorders, muscular dystrophy, and senescence, the beneficial effects of elevating NAD by NAD precursor supplementation on brain function, especially social interaction, and whether CD38 is required in this response, has not been intensely studied. Here, we report that oral gavage administration of nicotinamide riboside, a perspective NAD precursor with high bioavailability, for 12 days did not show any suppressive or increasing effects on sociability (mouse's interest in social targets compared to non-social targets) in both CD157KO and CD38KO male mice models in a three-chamber test. CD157KO and CD38KO mice displayed no social preference (that is, more interest towards a novel mouse than a familiar one) behavior. This defect was rescued after oral gavage administration of nicotinamide riboside for 12 days in CD157KO mice, but not in CD38KO mice. Social memory was not observed in CD157KO and CD38KO mice; subsequently, nicotinamide riboside administration had no effect on social memory. Together with the results that nicotinamide riboside had essentially no or little effect on body weight during treatment in CD157KO mice, nicotinamide riboside is less harmful and has beneficial effect on defects in recovery from social behavioral, for which CD38 is required in mice.
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Affiliation(s)
- Maria Gerasimenko
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa, Japan
| | - Haruhiro Higashida
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa, Japan
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Pereira M, Smiley KO, Lonstein JS. Parental Behavior in Rodents. ADVANCES IN NEUROBIOLOGY 2022; 27:1-53. [PMID: 36169811 DOI: 10.1007/978-3-030-97762-7_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Members of the order Rodentia are among the best-studied mammals for understanding the patterns, outcomes, and biological determinants of maternal and paternal caregiving. This research has provided a wealth of information but has historically focused on just a few rodents, mostly members of the two Myomorpha families that easily breed and can be studied within a laboratory setting (including laboratory rats, mice, hamsters, voles, gerbils). It is unclear how well this small collection of animals represents the over 2000 species of extant rodents. This chapter provides an overview of the hormonal and neurobiological systems involved in parental care in rodents, with a purposeful eye on providing information known or could be gleaned about parenting in various less-traditional members of Rodentia. We conclude from this analysis that the few commonly studied rodents are not necessarily even representative of the highly diverse members of Myomorpha, let alone other rodent suborders, and that additional laboratory and field studies of members of this order more broadly would surely provide invaluable information toward revealing a more representative picture of the rich diversity in rodent parenting.
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Affiliation(s)
- Mariana Pereira
- Department of Psychological and Brain Sciences, University of Massachusetts, Amherst, MA, USA
| | - Kristina O Smiley
- Centre for Neuroendocrinology & Department of Anatomy, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Joseph S Lonstein
- Department of Psychology & Neuroscience Program, Michigan State University, East Lansing, MI, USA.
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Oxytocin ameliorates impaired social behavior in a Chd8 haploinsufficiency mouse model of autism. BMC Neurosci 2021; 22:32. [PMID: 33933000 PMCID: PMC8088024 DOI: 10.1186/s12868-021-00631-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Accepted: 03/24/2021] [Indexed: 11/18/2022] Open
Abstract
Background Autism spectrum disorder (ASD) is characterized by the core symptoms of impaired social interactions. Increasing evidence suggests that ASD has a strong genetic link with mutations in chromodomain helicase DNA binding protein 8 (CHD8), a gene encoding a chromatin remodeler. It has previously been shown that Chd8 haplodeficient male mice manifest ASD-like behavioral characteristics such as anxiety and altered social behavior. Along with that, oxytocin (OT) is one of the main neuropeptides involved in social behavior. Administration of OT has shown improvement of social behavior in genetic animal models of ASD. The present study was undertaken to further explore behavioral abnormalities of Chd8 haplodeficient mice of both sexes, their link with OT, and possible effects of OT administration. First, we performed a battery of behavioral tests on wild-type and Chd8+/∆SL female and male mice. Next, we measured plasma OT levels and finally studied the effects of intraperitoneal OT injection on observed behavioral deficits. Results We showed general anxiety phenotype in Chd8+/∆SL mice regardless of sex, the depressive phenotype in Chd8+/∆SL female mice only and bidirectional social deficit in female and male mice. We observed decreased level of OT in Chd+/∆SL mice, possibly driven by males. Mice injected by OT demonstrated recovery of social behavior, while reduced anxiety was observed only in male mice. Conclusions Here, we demonstrated that abnormal social behaviors were observed in both male and female Chd8+/∆SL mice. The ability of peripheral OT administration to affect such behaviors along with altered plasma OT levels indicated a possible link between Chd8 + /∆SL and OT in the pathogenesis of ASD as well as the possible usefulness of OT as a therapeutic tool for ASD patients with CHD8 mutations. Supplementary Information The online version contains supplementary material available at 10.1186/s12868-021-00631-6.
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Shabalova AA, Liang M, Zhong J, Huang Z, Tsuji C, Shnayder NA, Lopatina O, Salmina AB, Okamoto H, Yamamoto Y, Zhong ZG, Yokoyama S, Higashida H. Oxytocin and CD38 in the paraventricular nucleus play a critical role in paternal aggression in mice. Horm Behav 2020; 120:104695. [PMID: 31987898 DOI: 10.1016/j.yhbeh.2020.104695] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 01/21/2020] [Accepted: 01/21/2020] [Indexed: 10/25/2022]
Abstract
In mammals, the development of healthy offspring requires maternal care. Behavior by lactating mothers toward other individuals is an important component of maternal aggression. However, it is unclear whether fathers display aggression primed by pups (an external factor), and the protection mechanism is poorly understood. To address this question, we examined paternal aggression in the ICR mouse strain. We found that sires exposed to cues from pups and lactating dams showed stronger aggression toward intruders than did sires that were deprived of family cues or exposed to nonlactating mates. c-Fos immunohistochemistry showed that cells in both the paraventricular and supraoptic nuclei (PVN and SON, respectively) in the hypothalamus of sires exposed to any cues were highly activated. However, c-Fos activation in oxytocinergic neurons was increased only in sires exposed to pup cues and solely in the PVN. In Cd38-knockout sires, the presence of pups induced no or reduced parental aggression; however, this phenotype was recovered, that is, aggression increased to the wild-type level, after intraperitoneal administration of oxytocin (OT). Specific c-Fos activation patterns induced by pup cues were not found in the PVN of knockout sires. These results demonstrate that the PVN is one of the primary hypothalamic areas involved in paternal aggression and suggest that a CD38-dependent OT mechanism in oxytocinergic neurons is critical for part of the behavior associated with the protection of offspring by nurturing male mice.
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Affiliation(s)
- Anna A Shabalova
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan; Department of Socioneurosciences, United Graduate School of Child Development, Osaka University, Kanazawa University, Hamamatsu University School of Medicine, Chiba University and University of Fukui, Kanazawa Campus, Kanazawa 920-8640, Japan
| | - Mingkun Liang
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan; Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning, Guangxi 530011, China
| | - Jing Zhong
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan; Department of Physiology, Guangxi University of Chinese Medicine, Xianhu Campus, Nanning, Guangxi 530200, China
| | - Zhiqi Huang
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan; Pharmaceutical Sciences, Guangxi University of Chinese Medicine, Xianhu Campus, Nanning, Guangxi 530200, China
| | - Chiharu Tsuji
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan
| | - Natalia A Shnayder
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan
| | - Olga Lopatina
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan; Laboratory for Social Brain Studies, Research Institute of Molecular Medicine and Pathobiochemistry, Department of Biochemistry, Krasnoyarsk State Medical University named after Prof. V. F. Voino-Yasentsky, Krasnoyarsk 660022, Russia
| | - Alla B Salmina
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan; Laboratory for Social Brain Studies, Research Institute of Molecular Medicine and Pathobiochemistry, Department of Biochemistry, Krasnoyarsk State Medical University named after Prof. V. F. Voino-Yasentsky, Krasnoyarsk 660022, Russia
| | - Hiroshi Okamoto
- Department of Biochemistry and Molecular Vascular Biology, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8640, Japan
| | - Yasuhiko Yamamoto
- Department of Biochemistry and Molecular Vascular Biology, Kanazawa University Graduate School of Medical Sciences, Kanazawa 920-8640, Japan
| | - Zeng-Guo Zhong
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan; Center of Research & Development of New Drugs, Guangxi Traditional Chinese Medical University, Guangxi Zhuang Autonomous Region, Nanning 530001, China
| | - Shigeru Yokoyama
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan
| | - Haruhiro Higashida
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan; Laboratory for Social Brain Studies, Research Institute of Molecular Medicine and Pathobiochemistry, Department of Biochemistry, Krasnoyarsk State Medical University named after Prof. V. F. Voino-Yasentsky, Krasnoyarsk 660022, Russia.
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The Role of Olfactory Genes in the Expression of Rodent Paternal Care Behavior. Genes (Basel) 2020; 11:genes11030292. [PMID: 32164379 PMCID: PMC7140856 DOI: 10.3390/genes11030292] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/03/2020] [Accepted: 03/05/2020] [Indexed: 12/16/2022] Open
Abstract
Olfaction is the dominant sensory modality in rodents, and is crucial for regulating social behaviors, including parental care. Paternal care is rare in rodents, but can have significant consequences for offspring fitness, suggesting a need to understand the factors that regulate its expression. Pup-related odor cues are critical for the onset and maintenance of paternal care. Here, I consider the role of olfaction in the expression of paternal care in rodents. The medial preoptic area shares neural projections with the olfactory and accessory olfactory bulbs, which are responsible for the interpretation of olfactory cues detected by the main olfactory and vomeronasal systems. The olfactory, trace amine, membrane-spanning 4-pass A, vomeronasal 1, vomeronasal 2 and formyl peptide receptors are all involved in olfactory detection. I highlight the roles that 10 olfactory genes play in the expression of direct paternal care behaviors, acknowledging that this list is not exhaustive. Many of these genes modulate parental aggression towards intruders, and facilitate the recognition and discrimination of pups in general. Much of our understanding comes from studies on non-naturally paternal laboratory rodents. Future studies should explore what role these genes play in the regulation and expression of paternal care in naturally biparental species.
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Cherepanov SM, Miura R, Shabalova AA, Ichinose W, Yokoyama S, Fukuda H, Watanabe M, Higashida H, Shuto S. Synthesis of oxytocin derivatives lipidated via a carbonate or carbamate linkage as a long-acting therapeutic agent for social impairment-like behaviors. Bioorg Med Chem 2019; 27:3358-3363. [PMID: 31229420 DOI: 10.1016/j.bmc.2019.06.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 06/06/2019] [Accepted: 06/09/2019] [Indexed: 01/06/2023]
Abstract
In the course of our studies of hydrophobic oxytocin (OT) analogues, we newly synthesized lipidated OT (LOT-4a-c and LOT-5a-c), in which a long alkyl chain (C14-C16) is conjugated via a carbonate or carbamate linkage at the Tyr-2 phenolic hydroxy group and a palmitoyl group at the terminal amino group of Cys-1. These LOTs did not activate OT and vasopressin receptors. Among the LOTs, however, LOT-4c, having a C16-chain via a carbonate linkage at the phenolic hydroxyl group of the Tyr-2, showed very long-lasting action for the recovery of impaired social behavior in CD38 knockout mice, a rodent model of autistic phenotypes, whereas the effect of OT itself rapidly diminished. These results indicate that LOT-4c may serve as a potential prodrug in mice.
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Affiliation(s)
- Stanislav M Cherepanov
- Department of Basic Research on Social Recognition, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan
| | - Risako Miura
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Anna A Shabalova
- Department of Basic Research on Social Recognition, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan
| | - Wataru Ichinose
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Shigeru Yokoyama
- Department of Basic Research on Social Recognition, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan
| | - Hayato Fukuda
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Mizuki Watanabe
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Haruhiro Higashida
- Department of Basic Research on Social Recognition, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.
| | - Satoshi Shuto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan; Center for Research and Education on Drug Discovery, Hokkaido University, Sapporo 060-0812, Japan.
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Lee MR, Shin JH, Deschaine S, Daurio AM, Stangl BL, Yan J, Ramchandani VA, Schwandt ML, Grodin EN, Momenan R, Corral-Frias NS, Hariri AR, Bogdan R, Alvarez VA, Leggio L. A role for the CD38 rs3796863 polymorphism in alcohol and monetary reward: evidence from CD38 knockout mice and alcohol self-administration, [11C]-raclopride binding, and functional MRI in humans. THE AMERICAN JOURNAL OF DRUG AND ALCOHOL ABUSE 2019; 46:167-179. [PMID: 31365285 DOI: 10.1080/00952990.2019.1638928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Background: Cluster of differentiation 38 (CD38) is a transmembrane protein expressed in dopaminergic reward pathways in the brain, including the nucleus accumbens (NAc). The GG genotype of a common single nucleotide polymorphism (SNP) within CD38, rs3796863, is associated with increased social reward.Objective: Examine whether CD38 rs3796863 and Cd38 knockout (KO) are associated with reward-related neural and behavioral phenotypes.Methods: Data from four independent human studies were used to test whether rs3796863 genotype is associated with: (1) intravenous alcohol self-administration (n = 64, 30 females), (2) alcohol-stimulated dopamine (DA) release measured using 11C-raclopride positron emission tomography (n = 22 men), (3) ventral striatum (VS) response to positive feedback measured using a card guessing functional magnetic resonance imaging (fMRI) paradigm (n = 531, 276 females), and (4) resting state functional connectivity (rsfc) of the VS (n = 51, 26 females). In a fifth study, we used a mouse model to examine whether cd38 knockout influences stimulated DA release in the NAc core and dorsal striatum using fast-scanning cyclic voltammetry.Results: Relative to T allele carriers, G homozygotes at rs3796863 within CD38 were characterized by greater alcohol self-administration, alcohol-stimulated dopamine release, VS response to positive feedback, and rsfc between the VS and anterior cingulate cortex. High-frequency stimulation reduced DA release among Cd38 KO mice had reduced dopamine release in the NAc.Conclusion: Converging evidence suggests that CD38 rs3796863 genotype may increase DA-related reward response and alcohol consumption.
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Affiliation(s)
- Mary R Lee
- Section on Clinical Psychoneuroendocrinology and Neuropsychopharmacology, NIAAA and NIDA, NIH, Bethesda, MD, USA
| | - Jung H Shin
- Laboratory on Neurobiology of Compulsive Behaviors, NIAAA, NIH, Rockville, MD, USA
| | - Sara Deschaine
- Section on Clinical Psychoneuroendocrinology and Neuropsychopharmacology, NIAAA and NIDA, NIH, Bethesda, MD, USA
| | - Allison M Daurio
- Section on Clinical Psychoneuroendocrinology and Neuropsychopharmacology, NIAAA and NIDA, NIH, Bethesda, MD, USA
| | - Bethany L Stangl
- Section on Human Psychopharmacology, NIAAA, NIH, Bethesda, MD, USA
| | - Jia Yan
- Section on Human Psychopharmacology, NIAAA, NIH, Bethesda, MD, USA
| | | | | | - Erica N Grodin
- Clinical NeuroImaging Research Core, NIAAA, NIH, Bethesda, MD, USA.,Department of Neuroscience, Brown University, Providence, RI, USA
| | - Reza Momenan
- Clinical NeuroImaging Research Core, NIAAA, NIH, Bethesda, MD, USA
| | - Nadia S Corral-Frias
- BRAIN Laboratory, Department of Psychology, Washington University in St. Louis, St. Louis, MO, USA.,Psychology Department, University of Sonora, Hermosillo, Sonora, Mexico
| | - Ahmad R Hariri
- Laboratory of NeuroGenetics, Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Ryan Bogdan
- BRAIN Laboratory, Department of Psychology, Washington University in St. Louis, St. Louis, MO, USA
| | - Veronica A Alvarez
- Laboratory on Neurobiology of Compulsive Behaviors, NIAAA, NIH, Rockville, MD, USA
| | - Lorenzo Leggio
- Section on Clinical Psychoneuroendocrinology and Neuropsychopharmacology, NIAAA and NIDA, NIH, Bethesda, MD, USA.,Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA
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Ichinose W, Cherepanov SM, Shabalova AA, Yokoyama S, Yuhi T, Yamaguchi H, Watanabe A, Yamamoto Y, Okamoto H, Horike S, Terakawa J, Daikoku T, Watanabe M, Mano N, Higashida H, Shuto S. Development of a Highly Potent Analogue and a Long-Acting Analogue of Oxytocin for the Treatment of Social Impairment-Like Behaviors. J Med Chem 2019; 62:3297-3310. [PMID: 30896946 DOI: 10.1021/acs.jmedchem.8b01691] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The nonapeptide hormone oxytocin (OT) has pivotal brain roles in social recognition and interaction and is thus a promising therapeutic drug for social deficits. Because of its peptide structure, however, OT is rapidly eliminated from the bloodstream, which decreases its potential therapeutic effects in the brain. We found that newly synthesized OT analogues in which the Pro7 of OT was replaced with N-( p-fluorobenzyl)glycine (2) or N-(3-hydroxypropyl)glycine (5) exhibited highly potent binding affinities for OT receptors and Ca2+ mobilization effects by selectively activating OT receptors over vasopressin receptors in HEK cells, where 2 was identified as a superagonist ( EMax = 131%) for OT receptors. Furthermore, the two OT analogues had a remarkably long-acting effect, up to 16-24 h, on recovery from impaired social behaviors in two strains of CD38 knockout mice that exhibit autism spectrum disorder-like social behavioral deficits, whereas the effect of OT itself rapidly diminished.
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Affiliation(s)
| | | | | | | | | | - Hiroaki Yamaguchi
- Faculty of Pharmaceutical Sciences, Tohoku University and Department of Pharmaceutical Sciences , Tohoku University Hospital , Sendai 980-8574 , Japan
| | - Ayu Watanabe
- Faculty of Pharmaceutical Sciences, Tohoku University and Department of Pharmaceutical Sciences , Tohoku University Hospital , Sendai 980-8574 , Japan
| | | | | | - Shinichi Horike
- Kanazawa University Advanced Science Research Center , Kanazawa 920-8640 , Japan
| | - Junpei Terakawa
- Kanazawa University Advanced Science Research Center , Kanazawa 920-8640 , Japan
| | - Takiko Daikoku
- Kanazawa University Advanced Science Research Center , Kanazawa 920-8640 , Japan
| | | | - Nariyasu Mano
- Faculty of Pharmaceutical Sciences, Tohoku University and Department of Pharmaceutical Sciences , Tohoku University Hospital , Sendai 980-8574 , Japan
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Yuan W, He Z, Hou W, Wang L, Li L, Zhang J, Yang Y, Jia R, Qiao H, Tai F. Role of oxytocin in the medial preoptic area (MPOA) in the modulation of paternal behavior in mandarin voles. Horm Behav 2019; 110:46-55. [PMID: 30836063 DOI: 10.1016/j.yhbeh.2019.02.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 02/15/2019] [Accepted: 02/19/2019] [Indexed: 11/15/2022]
Abstract
Parental care plays an important role in individual survival and development in mammals. Many studies have focused on the mechanisms underlying maternal behavior. However, the underlying neural mechanisms of paternal behavior are less understood. Using monogamous mandarin voles (Microtus mandarinus), the present study found that fathers initiated more paternal behavior and the virgin male showed more infanticide. Moreover fathers had shorter latency to approach a pup at the postnatal day (PND) 10 than PND1, PND20 than nonfathers. Fathers had a shorter latency to take care of unfamiliar pups than nonfathers. They had higher levels of paternal behavior at PND 10 than PND1 and PND20 toward the mandarin vole pups. Fathers had a significantly higher serum concentration of oxytocin (OT) than virgin males. Both RT-PCR and Western blot results indicated that the levels of the oxytocin receptor (OTR) in the medial preoptic area (MPOA) of fathers were significantly higher than in virgin males, but the levels of vasopressin 1a receptor (V1AR) mRNA and protein expression in the MPOA did not show significant differences. Microinjection of an oxytocin receptor antagonist into the MPOA significantly reduced the total duration of paternal behavior and increased the latency to approach the pup and initiate paternal behavior. Our results indicated that OT plays a key role in the modulation of paternal behavior via the MPOA.
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Affiliation(s)
- Wei Yuan
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Zhixiong He
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Wenjuan Hou
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Limin Wang
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Laifu Li
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Jing Zhang
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Yang Yang
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Rui Jia
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Hui Qiao
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Fadao Tai
- Institute of Brain and Behavioral Sciences, College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China.
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12
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Marsh AA. The Caring Continuum: Evolved Hormonal and Proximal Mechanisms Explain Prosocial and Antisocial Extremes. Annu Rev Psychol 2019; 70:347-371. [DOI: 10.1146/annurev-psych-010418-103010] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Implicit in the long-standing disagreements about whether humans’ fundamental nature is predominantly caring or callous is an assumption of uniformity. This article reviews evidence that instead supports inherent variation in caring motivation and behavior. The continuum between prosocial and antisocial extremes reflects variation in the structure and function of neurohormonal systems originally adapted to motivate parental care and since repurposed to support generalized forms of care. Extreme social behaviors such as extraordinary acts of altruism and aggression can often be best understood as reflecting variation in the neural systems that support care. A review of comparative, developmental, and neurobiological research finds consistent evidence that variations in caring motivations and behavior reflect individual differences in sensitivity to cues that signal vulnerability and distress and in the tendency to generalize care outward from socially close to distant others. The often complex relationships between caring motivation and various forms of altruism and aggression are discussed.
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Affiliation(s)
- Abigail A. Marsh
- Department of Psychology, Georgetown University, Washington, DC 20057, USA
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13
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Salais-López H, Agustín-Pavón C, Lanuza E, Martínez-García F. The maternal hormone in the male brain: Sexually dimorphic distribution of prolactin signalling in the mouse brain. PLoS One 2018; 13:e0208960. [PMID: 30571750 PMCID: PMC6301622 DOI: 10.1371/journal.pone.0208960] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 11/27/2018] [Indexed: 01/10/2023] Open
Abstract
Research of the central actions of prolactin is highly focused on females, but this hormone has also documented roles in male physiology and behaviour. Here, we provide the first description of the pattern of prolactin-derived signalling in the male mouse brain, employing the immunostaining of phosphorylated signal transducer and activator of transcription 5 (pSTAT5) after exogenous prolactin administration. Next, we explore possible sexually dimorphic differences by comparing pSTAT5 immunoreactivity in prolactin-supplemented males and females. We also assess the role of testosterone in the regulation of central prolactin signalling in males by comparing intact with castrated prolactin-supplemented males. Prolactin-supplemented males displayed a widespread pattern of pSTAT5 immunoreactivity, restricted to brain centres showing expression of the prolactin receptor. Immunoreactivity for pSTAT5 was present in several nuclei of the preoptic, anterior and tuberal hypothalamus, as well as in the septofimbrial nucleus or posterodorsal medial amygdala of the telencephalon. Conversely, non-supplemented control males were virtually devoid of pSTAT5-immunoreactivity, suggesting that central prolactin actions in males are limited to situations concurrent with substantial hypophyseal prolactin release (e.g. stress or mating). Furthermore, comparison of prolactin-supplemented males and females revealed a significant, female-biased sexual dimorphism, supporting the view that prolactin has a preeminent role in female physiology and behaviour. Finally, in males, castration significantly reduced pSTAT5 immunoreactivity in some structures, including the paraventricular and ventromedial hypothalamic nuclei and the septofimbrial region, thus indicating a region-specific regulatory role of testosterone over central prolactin signalling.
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Affiliation(s)
- Hugo Salais-López
- Unitat Predepartamental de Medicina, Facultat de Ciències de la Salut, Universitat Jaume I, Castelló de la Plana, Spain
| | - Carmen Agustín-Pavón
- Unitat Predepartamental de Medicina, Facultat de Ciències de la Salut, Universitat Jaume I, Castelló de la Plana, Spain
- Departament de Biologia Cel·lular i de Biologia Funcional, Facultat de Ciències Biològiques, Universitat de València, València, Spain
| | - Enrique Lanuza
- Departament de Biologia Cel·lular i de Biologia Funcional, Facultat de Ciències Biològiques, Universitat de València, València, Spain
| | - Fernando Martínez-García
- Unitat Predepartamental de Medicina, Facultat de Ciències de la Salut, Universitat Jaume I, Castelló de la Plana, Spain
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14
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Seelke AMH, Bond JM, Simmons TC, Joshi N, Settles ML, Stolzenberg D, Rhemtulla M, Bales KL. Fatherhood alters gene expression within the MPOA. ENVIRONMENTAL EPIGENETICS 2018; 4:dvy026. [PMID: 30568805 PMCID: PMC6305489 DOI: 10.1093/eep/dvy026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 10/03/2018] [Accepted: 10/19/2018] [Indexed: 06/09/2023]
Abstract
Female parenting is obligate in mammals, but fathering behavior among mammals is rare. Only 3-5% of mammalian species exhibit biparental care, including humans, and mechanisms of fathering behavior remain sparsely studied. However, in species where it does exist, paternal care is often crucial to the survivorship of offspring. The present study is the first to identify new gene targets linked to the experience of fathering behavior in a biparental species using RNA sequencing. In order to determine the pattern of gene expression within the medial preoptic area that is specifically associated with fathering behavior, we identified genes in male prairie voles (Microtus ochrogaster) that experienced one of three social conditions: virgin males, pair bonded males, and males with fathering experience. A list of genes exhibiting different expression patterns in each comparison (i.e. Virgin vs Paired, Virgin vs Fathers, and Paired vs Fathers) was evaluated using the gene ontology enrichment analysis, and Kyoto Encyclopedia of Genes and Genomes pathways analysis to reveal metabolic pathways associated with specific genes. Using these tools, we generated a filtered list of genes that exhibited altered patterns of expression in voles with different amounts of social experience. Finally, we used NanoString to quantify differences in the expression of these selected genes. These genes are involved in a variety of processes, with enrichment in genes associated with immune function, metabolism, synaptic plasticity, and the remodeling of dendritic spines. The identification of these genes and processes will lead to novel insights into the biological basis of fathering behavior.
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Affiliation(s)
- Adele M H Seelke
- Department of Psychology, University of California, Davis, Davis, USA
| | - Jessica M Bond
- Department of Psychology, University of California, Davis, Davis, USA
| | - Trent C Simmons
- Department of Psychology, University of California, Davis, Davis, USA
| | - Nikhil Joshi
- Bioinformatics Core Facility, University of California, Davis, Davis, USA
| | - Matthew L Settles
- Bioinformatics Core Facility, University of California, Davis, Davis, USA
| | | | - Mijke Rhemtulla
- Department of Psychology, University of California, Davis, Davis, USA
| | - Karen L Bales
- Department of Psychology, University of California, Davis, Davis, USA
- California National Primate Research Center, University of California, Davis, Davis, USA
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15
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Oxytocin release via activation of TRPM2 and CD38 in the hypothalamus during hyperthermia in mice: Implication for autism spectrum disorder. Neurochem Int 2018; 119:42-48. [DOI: 10.1016/j.neuint.2017.07.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 07/13/2017] [Accepted: 07/19/2017] [Indexed: 12/12/2022]
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16
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Osipova ED, Komleva YK, Morgun AV, Lopatina OL, Panina YA, Olovyannikova RY, Vais EF, Salmin VV, Salmina AB. Designing in vitro Blood-Brain Barrier Models Reproducing Alterations in Brain Aging. Front Aging Neurosci 2018; 10:234. [PMID: 30127733 PMCID: PMC6088457 DOI: 10.3389/fnagi.2018.00234] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 07/17/2018] [Indexed: 12/22/2022] Open
Abstract
Blood-brain barrier (BBB) modeling in vitro is a huge area of research covering study of intercellular communications and development of BBB, establishment of specific properties that provide controlled permeability of the barrier. Current approaches in designing new BBB models include development of new (bio) scaffolds supporting barriergenesis/angiogenesis and BBB integrity; use of methods enabling modulation of BBB permeability; application of modern analytical techniques for screening the transfer of metabolites, bio-macromolecules, selected drug candidates and drug delivery systems; establishment of 3D models; application of microfluidic technologies; reconstruction of microphysiological systems with the barrier constituents. Acceptance of idea that BBB in vitro models should resemble real functional activity of the barrier in different periods of ontogenesis and in different (patho) physiological conditions leads to proposal that establishment of BBB in vitro model with alterations specific for aging brain is one of current challenges in neurosciences and bioengineering. Vascular dysfunction in the aging brain often associates with leaky BBB, alterations in perivascular microenvironment, neuroinflammation, perturbed neuronal and astroglial activity within the neurovascular unit, impairments in neurogenic niches where microvascular scaffold plays a key regulatory role. The review article is focused on aging-related alterations in BBB and current approaches to development of “aging” BBB models in vitro.
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Affiliation(s)
- Elena D Osipova
- Department of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia.,Research Institute of Molecular Medicine & Pathobiochemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Yulia K Komleva
- Department of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia.,Research Institute of Molecular Medicine & Pathobiochemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Andrey V Morgun
- Department of Medical and Biological Physics, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Olga L Lopatina
- Department of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia.,Research Institute of Molecular Medicine & Pathobiochemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Yulia A Panina
- Department of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Raissa Ya Olovyannikova
- Department of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Elizaveta F Vais
- Department of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Vladimir V Salmin
- Department of Medical and Biological Physics, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Alla B Salmina
- Department of Biochemistry, Medical, Pharmaceutical & Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia.,Research Institute of Molecular Medicine & Pathobiochemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
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17
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Olazábal DE. Role of oxytocin in parental behaviour. J Neuroendocrinol 2018; 30:e12594. [PMID: 29603440 DOI: 10.1111/jne.12594] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 03/01/2018] [Accepted: 03/22/2018] [Indexed: 12/21/2022]
Abstract
Both animal and human studies have provided conclusive evidence that oxytocin (OXT) acts in the brain (eg, medial preoptic area, ventral tegmental area, nucleus accumbens) to promote parental behaviour under different reproductive and physiological conditions. OXT appears to accelerate and strengthen the neural process that makes newborns attractive or rewarding. Furthermore, OXT reduces stress/anxiety and might improve mood and well being, resulting in indirect benefits for parents. However, OXT also plays a role in the development of species reproductive and social strategies, making some species or individuals more prone to display caring activities in nonreproductive contexts. There are important differences in the development of the OXT system and its regulation by gonadal hormones that can make individuals or species very different. Those intra- and interspecific differences in the OXT system have been associated with differences in parental behaviour. For example, differences in OXT levels in body fluids and genetic variants for the OXT and OXT receptor genes have been associated with variability in parental mood and behaviour in humans. Thus, OXT has received much attention as a potential therapeutic agent for affective, emotional and behavioural problems. Despite many preliminary studies indicating promising findings, several unknown aspects of the OXT system remain to be addressed before we can achieve a complete understanding of its function in the brain. The enormous interest that this area of study has attracted in the last decade will likely continually contribute to advancing our understanding of the role of OXT in parental behaviour and other behavioural and physiological functions.
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Affiliation(s)
- D E Olazábal
- Departamento de Fisiología, Facultad de Medicina, Universidad de la República Oriental del Uruguay (UdelaR), Montevideo, Uruguay
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18
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Different behavioral, neural and neuropeptide responses of fathers to their own and to alien pups in mandarin voles. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2017; 204:257-269. [DOI: 10.1007/s00359-017-1229-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 11/05/2017] [Accepted: 11/14/2017] [Indexed: 10/18/2022]
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19
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Cherepanov SM, Akther S, Nishimura T, Shabalova AA, Mizuno A, Ichinose W, Shuto S, Yamamoto Y, Yokoyama S, Higashida H. Effects of Three Lipidated Oxytocin Analogs on Behavioral Deficits in CD38 Knockout Mice. Brain Sci 2017; 7:brainsci7100132. [PMID: 29035307 PMCID: PMC5664059 DOI: 10.3390/brainsci7100132] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 10/03/2017] [Accepted: 10/11/2017] [Indexed: 12/13/2022] Open
Abstract
Oxytocin (OT) is a nonapeptide that plays an important role in social behavior. Nasal administration of OT has been shown to improve trust in healthy humans and social interaction in autistic subjects. As is consistent with the nature of a peptide, OT has some unfavorable characteristics: it has a short half-life in plasma and shows poor permeability across the blood-brain barrier. Analogs with long-lasting effects may overcome these drawbacks. To this end, we have synthesized three analogs: lipo-oxytocin-1 (LOT-1), in which two palmitoyl groups are conjugated to the cysteine and tyrosine residues, lipo-oxytocin-2 (LOT-2) and lipo-oxytocin-3 (LOT-3), which include one palmitoyl group conjugated at the cysteine or tyrosine residue, respectively. The following behavioral deficits were observed in CD38 knockout (CD38−/−) mice: a lack of paternal nurturing in CD38−/− sires, decreased ability for social recognition, and decreased sucrose consumption. OT demonstrated the ability to recover these disturbances to the level of wild-type mice for 30 min after injection. LOT-2 and LOT-3 partially recovered the behaviors for a short period. Conversely, LOT-1 restored the behavioral parameters, not for 30 min, but for 24 h. These data suggest that the lipidation of OT has some therapeutic benefits, and LOT-1 would be most useful because of its long-last activity.
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Affiliation(s)
- Stanislav M Cherepanov
- Department of Basic Research on Social Recognition, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.
| | - Shirin Akther
- Department of Basic Research on Social Recognition, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.
| | - Tomoko Nishimura
- Department of Basic Research on Social Recognition, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.
| | - Anna A Shabalova
- Department of Basic Research on Social Recognition, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.
| | - Akira Mizuno
- Faculty of Pharmaceutical Sciences, Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan.
| | - Wataru Ichinose
- Faculty of Pharmaceutical Sciences, Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan.
| | - Satoshi Shuto
- Faculty of Pharmaceutical Sciences, Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan.
| | - Yasuhiko Yamamoto
- Departments of Biochemistry and Molecular Vascular Biology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa 920-8640, Japan.
| | - Shigeru Yokoyama
- Department of Basic Research on Social Recognition, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.
| | - Haruhiro Higashida
- Department of Basic Research on Social Recognition, Research Center for Child Mental Development, Kanazawa University, Kanazawa 920-8640, Japan.
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20
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The Role of the Oxytocin/Arginine Vasopressin System in Animal Models of Autism Spectrum Disorder. ADVANCES IN ANATOMY EMBRYOLOGY AND CELL BIOLOGY 2017; 224:135-158. [DOI: 10.1007/978-3-319-52498-6_8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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21
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Cherepanov SM, Yokoyama S, Mizuno A, Ichinose W, Lopatina O, Shabalova AA, Salmina AB, Yamamoto Y, Okamoto H, Shuto S, Higashida H. Structure-specific effects of lipidated oxytocin analogs on intracellular calcium levels, parental behavior, and oxytocin concentrations in the plasma and cerebrospinal fluid in mice. Pharmacol Res Perspect 2017; 5:e00290. [PMID: 28596839 PMCID: PMC5461640 DOI: 10.1002/prp2.290] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 11/25/2016] [Accepted: 11/29/2016] [Indexed: 12/27/2022] Open
Abstract
Oxytocin (OT) is a neuroendocrine nonapeptide that plays an important role in social memory and behavior. Nasal administration of OT has been shown to improve trust in healthy humans and social interaction in autistic subjects in some clinical trials. As a central nervous system (CNS) drug, however, OT has two unfavorable characteristics: OT is short‐acting and shows poor permeability across the blood–brain barrier, because it exists in charged form in the plasma and has short half‐life. To overcome these drawbacks, an analog with long‐lasting effects is required. We previously synthesized the analog, lipo‐oxytocin‐1 (LOT‐1), in which two palmitoyl groups are conjugated to the cysteine and tyrosine residues. In this study, we synthesized and evaluated the analogs lipo‐oxytocin‐2 (LOT‐2) and lipo‐oxytocin‐3 (LOT‐3), which feature the conjugation of one palmitoyl group at the cysteine and tyrosine residues, respectively. In human embryonic kidney‐293 cells overexpressing human OT receptors, these three LOTs demonstrated comparably weak effects on the elevation of intracellular free calcium concentrations after OT receptor activation, compared to the effects of OT. The three LOTs and OT exhibited different time‐dependent effects on recovery from impaired pup retrieval behavior in sires of CD38‐knockout mice. Sires treated with LOT‐1 showed the strongest effect, whereas others had no or little effects at 24 h after injection. These results indicated that LOTs have structure‐specific agonistic effects, and suggest that lipidation of OT might have therapeutic benefits for social impairment.
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Affiliation(s)
- Stanislav M Cherepanov
- Department of Basic Research on Social Recognition Research Center for Child Mental Development Kanazawa University Kanazawa 920-8640 Japan
| | - Shigeru Yokoyama
- Department of Basic Research on Social Recognition Research Center for Child Mental Development Kanazawa University Kanazawa 920-8640 Japan
| | - Akira Mizuno
- Faculty of Pharmaceutical Sciences Hokkaido University Kita-12, Nishi-6, Kita-ku Sapporo 060-0812 Japan
| | - Wataru Ichinose
- Faculty of Pharmaceutical Sciences Hokkaido University Kita-12, Nishi-6, Kita-ku Sapporo 060-0812 Japan
| | - Olga Lopatina
- Research Institute of Molecular Medicine & Pathobiochemistry Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky Krasnoyarsk 660022 Russia
| | - Anna A Shabalova
- Department of Basic Research on Social Recognition Research Center for Child Mental Development Kanazawa University Kanazawa 920-8640 Japan
| | - Alla B Salmina
- Department of Basic Research on Social Recognition Research Center for Child Mental Development Kanazawa University Kanazawa 920-8640 Japan.,Research Institute of Molecular Medicine & Pathobiochemistry Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky Krasnoyarsk 660022 Russia
| | - Yasuhiko Yamamoto
- Department of Biochemistry and Molecular Vascular BiologyGraduate School of Medical Sciences Kanazawa University Kanazawa 920-8640 Japan
| | - Hiroshi Okamoto
- Department of Biochemistry and Molecular Vascular BiologyGraduate School of Medical Sciences Kanazawa University Kanazawa 920-8640 Japan.,Department of Advanced Biological Sciences for Regeneration (Kotobiken Medical Laboratories) Tohoku University Graduate School of Medicine Sendai 980-8575 Japan
| | - Satoshi Shuto
- Faculty of Pharmaceutical Sciences Hokkaido University Kita-12, Nishi-6, Kita-ku Sapporo 060-0812 Japan.,Center for Research and Education on Drug Discovery Hokkaido University Kita-12, Nishi-6, Kita-ku Sapporo060-0812 Japan
| | - Haruhiro Higashida
- Department of Basic Research on Social Recognition Research Center for Child Mental Development Kanazawa University Kanazawa 920-8640 Japan
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22
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Abstract
The oxytocin/vasopressin ancestor molecule has been regulating reproductive and social behaviors for more than 500 million years. In all mammals, oxytocin is the hormone indispensable for milk-ejection during nursing (maternal milk provision to offspring), a process that is crucial for successful mammalian parental care. In laboratory mice, a remarkable transcriptional activation occurs during parental behavior within the anterior commissural nucleus (AC), the largest magnocellular oxytocin cell population within the medial preoptic area (although the transcriptional activation was limited to non-oxytocinergic neurons in the AC). Furthermore, there are numerous recent reports on oxytocin's involvement in positive social behaviors in animals and humans. Given all those, the essential involvement of oxytocin in maternal/parental behaviors may seem obvious, but basic researchers are still struggling to pin down the exact role oxytocin plays in the regulation of parental behaviors. A major aim of this review is to more clearly define this role. The best conclusion at this moment is that OT can facilitate the onset of parental behavior, or parental behavior under stressful conditions.In this chapter, we will first review the basics of rodent parental behavior. Next, the neuroanatomy of oxytocin systems with respect to parental behavior in laboratory mice will be introduced. Then, the research history on the functional relationship between oxytocin and parental behavior, along with advancements in various techniques, will be reviewed. Finally, some technical considerations in conducting behavioral experiments on parental behavior in rodents will be addressed, with the aim of shedding light on certain pitfalls that should be avoided, so that the progress of research in this field will be facilitated. In this age of populism, researchers should strive to do even more scholarly works with further attention to methodological details.
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Affiliation(s)
- Chihiro Yoshihara
- Laboratory for Affiliative Social Behavior, RIKEN Brain Science Institute, Saitama, Japan
| | - Michael Numan
- Department of Psychology, University of New Mexico, Albuquerque, NM, USA.
| | - Kumi O Kuroda
- Laboratory for Affiliative Social Behavior, RIKEN Brain Science Institute, Saitama, Japan.
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23
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Tabbaa M, Paedae B, Liu Y, Wang Z. Neuropeptide Regulation of Social Attachment: The Prairie Vole Model. Compr Physiol 2016; 7:81-104. [PMID: 28135000 DOI: 10.1002/cphy.c150055] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Social attachments are ubiquitous among humans and integral to human health. Although great efforts have been made to elucidate the neural underpinnings regulating social attachments, we still know relatively little about the neuronal and neurochemical regulation of social attachments. As a laboratory animal research model, the socially monogamous prairie vole (Microtus ochrogaster) displays behaviors paralleling human social attachments and thus has provided unique insights into the neural regulation of social behaviors. Research in prairie voles has particularly highlighted the significance of neuropeptidergic regulation of social behaviors, especially of the roles of oxytocin (OT) and vasopressin (AVP). This article aims to review these findings. We begin by discussing the role of the OT and AVP systems in regulating social behaviors relevant to social attachments, and thereafter restrict our discussion to studies in prairie voles. Specifically, we discuss the role of OT and AVP in adult mate attachments, biparental care, social isolation, and social buffering as informed by studies utilizing the prairie vole model. Not only do these studies offer insight into social attachments in humans, but they also point to dysregulated mechanisms in several mental disorders. We conclude by discussing these implications for human health. © 2017 American Physiological Society. Compr Physiol 7:81-104, 2017.
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Affiliation(s)
- Manal Tabbaa
- Department of Psychology and Program in Neuroscience, Florida State University, Tallahassee, Florida, USA
| | - Brennan Paedae
- Department of Psychology and Program in Neuroscience, Florida State University, Tallahassee, Florida, USA
| | - Yan Liu
- Department of Psychology and Program in Neuroscience, Florida State University, Tallahassee, Florida, USA
| | - Zuoxin Wang
- Department of Psychology and Program in Neuroscience, Florida State University, Tallahassee, Florida, USA
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24
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Nephew BC. The Neurobiology of Parenting: Basic Research. Curr Behav Neurosci Rep 2016. [DOI: 10.1007/s40473-016-0059-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Kim S, Kim T, Lee HR, Jang EH, Ryu HH, Kang M, Rah SY, Yoo J, Lee B, Kim JI, Lim CS, Kim SJ, Kim UH, Lee YS, Kaang BK. Impaired learning and memory in CD38 null mutant mice. Mol Brain 2016; 9:16. [PMID: 26856703 PMCID: PMC4746819 DOI: 10.1186/s13041-016-0195-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 02/01/2016] [Indexed: 11/17/2022] Open
Abstract
CD38 is an enzyme that catalyzes the formation of cyclic ADP ribose and nicotinic acid adenine dinucleotide phosphate, both of which are involved in the mobilization of Ca2+ from intracellular stores. Recently, CD38 has been shown to regulate oxytocin release from hypothalamic neurons. Importantly, CD38 mutations are associated with autism spectrum disorders (ASD) and CD38 knockout (CD38−/−) mice display ASD-like behavioral phenotypes including deficient parental behavior and poor social recognition memory. Although ASD and learning deficits commonly co-occur, the role of CD38 in learning and memory has not been investigated. We report that CD38−/− mice show deficits in various learning and memory tasks such as the Morris water maze, contextual fear conditioning, and the object recognition test. However, either long-term potentiation or long-term depression is not impaired in the hippocampus of CD38−/− mice. Our results provide convincing evidence that CD38−/− mice show deficits in various learning and memory tasks including spatial and non-spatial memory tasks. Our data demonstrate that CD38 is critical for regulating hippocampus-dependent learning and memory without modulating synaptic plasticity.
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Affiliation(s)
- Somi Kim
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, 1 Gwanangno, Gwanak-gu, Seoul, 08826, South Korea.
| | - TaeHyun Kim
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, 1 Gwanangno, Gwanak-gu, Seoul, 08826, South Korea.
| | - Hye-Ryeon Lee
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, 1 Gwanangno, Gwanak-gu, Seoul, 08826, South Korea.
| | - Eun-Hye Jang
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, 1 Gwanangno, Gwanak-gu, Seoul, 08826, South Korea.
| | - Hyun-Hee Ryu
- Department of Life Science, Chung-Ang University, Seoul, 156-756, South Korea.
| | - Minkyung Kang
- Department of Life Science, Chung-Ang University, Seoul, 156-756, South Korea.
| | - So-Young Rah
- Departments of Biochemistry, Institute of Cardiovascular Research, Chonbuk National University Medical School, Jeonju, 561-182, South Korea.
| | - Juyoun Yoo
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, 1 Gwanangno, Gwanak-gu, Seoul, 08826, South Korea.
| | - Bolam Lee
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, 1 Gwanangno, Gwanak-gu, Seoul, 08826, South Korea.
| | - Jae-Ick Kim
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, 1 Gwanangno, Gwanak-gu, Seoul, 08826, South Korea.
| | - Chae Seok Lim
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, 1 Gwanangno, Gwanak-gu, Seoul, 08826, South Korea.
| | - Sang Jeong Kim
- Department of Physiology, Seoul National University College of Medicine, Seoul, 110-799, South Korea.
| | - Uh-Hyun Kim
- Departments of Biochemistry, Institute of Cardiovascular Research, Chonbuk National University Medical School, Jeonju, 561-182, South Korea.
| | - Yong-Seok Lee
- Department of Life Science, Chung-Ang University, Seoul, 156-756, South Korea.
| | - Bong-Kiun Kaang
- Department of Biological Sciences, College of Natural Sciences, Seoul National University, 1 Gwanangno, Gwanak-gu, Seoul, 08826, South Korea.
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26
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Numan M, Young LJ. Neural mechanisms of mother-infant bonding and pair bonding: Similarities, differences, and broader implications. Horm Behav 2016; 77:98-112. [PMID: 26062432 PMCID: PMC4671834 DOI: 10.1016/j.yhbeh.2015.05.015] [Citation(s) in RCA: 211] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 04/30/2015] [Accepted: 05/18/2015] [Indexed: 10/23/2022]
Abstract
This article is part of a Special Issue "Parental Care". Mother-infant bonding is a characteristic of virtually all mammals. The maternal neural system may have provided the scaffold upon which other types of social bonds in mammals have been built. For example, most mammals exhibit a polygamous mating system, but monogamy and pair bonding between mating partners occur in ~5% of mammalian species. In mammals, it is plausible that the neural mechanisms that promote mother-infant bonding have been modified by natural selection to establish the capacity to develop a selective bond with a mate during the evolution of monogamous mating strategies. Here we compare the details of the neural mechanisms that promote mother-infant bonding in rats and other mammals with those that underpin pair bond formation in the monogamous prairie vole. Although details remain to be resolved, remarkable similarities and a few differences between the mechanisms underlying these two types of bond formation are revealed. For example, amygdala and nucleus accumbens-ventral pallidum (NA-VP) circuits are involved in both types of bond formation, and dopamine and oxytocin actions within NA appear to promote the synaptic plasticity that allows either infant or mating partner stimuli to persistently activate NA-VP attraction circuits, leading to an enduring social attraction and bonding. Further, although the medial preoptic area is essential for maternal behavior, its role in pair bonding remains to be determined. Our review concludes by examining the broader implications of this comparative analysis, and evidence is provided that the maternal care system may have also provided the basic neural foundation for other types of strong social relationships, beyond pair bonding, in mammals, including humans.
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Affiliation(s)
| | - Larry J Young
- Center for Translational Social Neuroscience, Silvio O. Conte Center for Oxytocin and Social Cognition, Yerkes National Primate Research Center, Department of Psychiatry and Behavioral Sciences, Emory University, Atlanta, GA 30329, United States
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27
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Akther S, Huang Z, Liang M, Zhong J, Fakhrul AAKM, Yuhi T, Lopatina O, Salmina AB, Yokoyama S, Higashida C, Tsuji T, Matsuo M, Higashida H. Paternal Retrieval Behavior Regulated by Brain Estrogen Synthetase (Aromatase) in Mouse Sires that Engage in Communicative Interactions with Pairmates. Front Neurosci 2015; 9:450. [PMID: 26696812 PMCID: PMC4678232 DOI: 10.3389/fnins.2015.00450] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 11/13/2015] [Indexed: 12/03/2022] Open
Abstract
Parental behaviors involve complex social recognition and memory processes and interactive behavior with children that can greatly facilitate healthy human family life. Fathers play a substantial role in child care in a small but significant number of mammals, including humans. However, the brain mechanism that controls male parental behavior is much less understood than that controlling female parental behavior. Fathers of non-monogamous laboratory ICR mice are an interesting model for examining the factors that influence paternal responsiveness because sires can exhibit maternal-like parental care (retrieval of pups) when separated from their pups along with their pairmates because of olfactory and auditory signals from the dams. Here we tested whether paternal behavior is related to femininity by the aromatization of testosterone. For this purpose, we measured the immunoreactivity of aromatase [cytochrome P450 family 19 (CYP19)], which synthesizes estrogen from androgen, in nine brain regions of the sire. We observed higher levels of aromatase expression in these areas of the sire brain when they engaged in communicative interactions with dams in separate cages. Interestingly, the number of nuclei with aromatase immunoreactivity in sires left together with maternal mates in the home cage after pup-removing was significantly larger than that in sires housed with a whole family. The capacity of sires to retrieve pups was increased following a period of 5 days spent with the pups as a whole family after parturition, whereas the acquisition of this ability was suppressed in sires treated daily with an aromatase inhibitor. The results demonstrate that the dam significantly stimulates aromatase in the male brain and that the presence of the pups has an inhibitory effect on this increase. These results also suggest that brain aromatization regulates the initiation, development, and maintenance of paternal behavior in the ICR male mice.
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Affiliation(s)
- Shirin Akther
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan
| | - Zhiqi Huang
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan
| | - Mingkun Liang
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan
| | - Jing Zhong
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan
| | - Azam A K M Fakhrul
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan
| | - Teruko Yuhi
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan
| | - Olga Lopatina
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan ; Department of Biochemistry, Medical Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University Krasnoyarsk, Russia
| | - Alla B Salmina
- Department of Biochemistry, Medical Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University Krasnoyarsk, Russia
| | - Shigeru Yokoyama
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan
| | - Chiharu Higashida
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan
| | - Takahiro Tsuji
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan
| | - Mie Matsuo
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan
| | - Haruhiro Higashida
- Department of Basic Research on Social Recognition, Kanazawa University Research Center for Child Mental Development Kanazawa, Japan
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28
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Olazábal DE. Comparative analysis of oxytocin receptor density in the nucleus accumbens: an adaptation for female and male alloparental care? ACTA ACUST UNITED AC 2015; 108:213-20. [PMID: 25446893 DOI: 10.1016/j.jphysparis.2014.10.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 07/22/2014] [Accepted: 10/06/2014] [Indexed: 12/25/2022]
Abstract
Parental behavior is commonly displayed by progenitors. However, other individuals, genetically related (e.g. siblings, aunts, uncles) or not with the newborns, also display parental behavior (commonly called alloparental, or adoptive behavior). I hypothesize that species that live in family or social groups where other non-reproductive members (males and females) take care of infants, have brain adaptations to promote or facilitate that behavioral response. The present work revises the evidence supporting the hypothesis that high density of oxytocin receptors (OXTR) in the nucleus accumbens (NA) is one of those adaptations. All species known to have high NA OXTR show not only female, but also male alloparental care. Therefore, I predict that high NA OXTR could be present in all species in which juvenile and adult male alloparental behavior have been observed. Strategies to test this and other alternative working hypothesis and its predictions are presented.
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29
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Johnson SA, Javurek AB, Painter MS, Peritore MP, Ellersieck MR, Roberts RM, Rosenfeld CS. Disruption of parenting behaviors in california mice, a monogamous rodent species, by endocrine disrupting chemicals. PLoS One 2015; 10:e0126284. [PMID: 26039462 PMCID: PMC4454565 DOI: 10.1371/journal.pone.0126284] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2015] [Accepted: 03/31/2015] [Indexed: 12/31/2022] Open
Abstract
The nature and extent of care received by an infant can affect social, emotional and cognitive development, features that endure into adulthood. Here we employed the monogamous, California mouse (Peromyscus californicus), a species, like the human, where both parents invest in offspring care, to determine whether early exposure to endocrine disrupting chemicals (EDC: bisphenol A, BPA; ethinyl estradiol, EE) of one or both parents altered their behaviors towards their pups. Females exposed to either compound spent less time nursing, grooming and being associated with their pups than controls, although there was little consequence on their weight gain. Care of pups by males was less affected by exposure to BPA and EE, but control, non-exposed females appeared able to “sense” a male partner previously exposed to either compound and, as a consequence, reduced their own parental investment in offspring from such pairings. The data emphasize the potential vulnerability of pups born to parents that had been exposed during their own early development to EDC, and that effects on the male, although subtle, also have consequences on overall parental care due to lack of full acceptance of the male by the female partner.
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Affiliation(s)
- Sarah A. Johnson
- Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, United States of America
- Biomedical Sciences, University of Missouri, Columbia, MO, 65211, United States of America
| | - Angela B. Javurek
- Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, United States of America
- Biomedical Sciences, University of Missouri, Columbia, MO, 65211, United States of America
| | - Michele S. Painter
- Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, United States of America
- Biomedical Sciences, University of Missouri, Columbia, MO, 65211, United States of America
| | - Michael P. Peritore
- Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, United States of America
- Biomedical Sciences, University of Missouri, Columbia, MO, 65211, United States of America
| | - Mark R. Ellersieck
- Agriculture Experimental Station-Statistics, University of Missouri, Columbia, MO, 65211, United States of America
| | - R. Michael Roberts
- Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, United States of America
- Animal Sciences, University of Missouri, Columbia, MO, 65211, United States of America
- Biochemistry, University of Missouri, Columbia, MO, 65211, United States of America
- Genetics Area Program, University of Missouri, Columbia, MO, 65211, United States of America
| | - Cheryl S. Rosenfeld
- Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, United States of America
- Biomedical Sciences, University of Missouri, Columbia, MO, 65211, United States of America
- Genetics Area Program, University of Missouri, Columbia, MO, 65211, United States of America
- * E-mail:
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30
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Dölen G. Oxytocin: parallel processing in the social brain? J Neuroendocrinol 2015; 27:516-35. [PMID: 25912257 DOI: 10.1111/jne.12284] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 03/29/2015] [Accepted: 04/07/2015] [Indexed: 12/31/2022]
Abstract
Early studies attempting to disentangle the network complexity of the brain exploited the accessibility of sensory receptive fields to reveal circuits made up of synapses connected both in series and in parallel. More recently, extension of this organisational principle beyond the sensory systems has been made possible by the advent of modern molecular, viral and optogenetic approaches. Here, evidence supporting parallel processing of social behaviours mediated by oxytocin is reviewed. Understanding oxytocinergic signalling from this perspective has significant implications for the design of oxytocin-based therapeutic interventions aimed at disorders such as autism, where disrupted social function is a core clinical feature. Moreover, identification of opportunities for novel technology development will require a better appreciation of the complexity of the circuit-level organisation of the social brain.
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Affiliation(s)
- Gül Dölen
- Department of Neuroscience, Brain Science Institute, Wendy Klag Center for Developmental Disabilities and Autism, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
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31
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Zhong J, Liang M, Akther S, Higashida C, Tsuji T, Higashida H. c-Fos expression in the paternal mouse brain induced by communicative interaction with maternal mates. Mol Brain 2014; 7:66. [PMID: 25208928 PMCID: PMC4172782 DOI: 10.1186/s13041-014-0066-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Accepted: 08/25/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Appropriate parental care by fathers greatly facilitates health in human family life. Much less is known from animal studies regarding the factors and neural circuitry that affect paternal behavior compared with those affecting maternal behavior. We recently reported that ICR mouse sires displayed maternal-like retrieval behavior when they were separated from pups and caged with their mates (co-housing) because the sires receive communicative interactions via ultrasonic and pheromone signals from the dams. We investigated the brain structures involved in regulating this activity by quantifying c-Fos-immunoreactive cells as neuronal activation markers in the neural pathway of male parental behavior. RESULTS c-Fos expression in the medial preoptic area (mPOA) was significantly higher in sires that exhibited retrieval behavior (retrievers) than those with no such behavior (non-retrievers). Identical increased expression was found in the mPOA region in the retrievers stimulated by ultrasonic vocalizations or pheromones from their mates. Such increases in expression were not observed in the ventral tegmental area (VTA), nucleus accumbens (NAcc) or ventral palladium (VP). On the following day that we identified the families of the retrievers or non-retrievers, c-Fos expression in neuronal subsets in the mPOA, VTA, NAcc and VP was much higher in the retriever sires when they isolated together with their mates in new cages. This difference was not observed in the singly isolated retriever sires in new cages. The non-retriever sires did not display expression changes in the four brain regions that were assessed. CONCLUSION The mPOA neurons appeared to be activated by direct communicative interactions with mate dams, including ultrasonic vocalizations and pheromones. The mPOA-VTA-NAcc-VP neural circuit appears to be involved in paternal retrieval behavior.
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Affiliation(s)
| | | | | | | | | | - Haruhiro Higashida
- Kanazawa University Center for Child Mental Development, Kanazawa, Japan.
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32
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Veening JG, de Jong TR, Waldinger MD, Korte SM, Olivier B. The role of oxytocin in male and female reproductive behavior. Eur J Pharmacol 2014; 753:209-28. [PMID: 25088178 DOI: 10.1016/j.ejphar.2014.07.045] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 05/30/2014] [Accepted: 07/24/2014] [Indexed: 01/01/2023]
Abstract
Oxytocin (OT) is a nonapeptide with an impressive variety of physiological functions. Among them, the 'prosocial' effects have been discussed in several recent reviews, but the direct effects on male and female sexual behavior did receive much less attention so far. As our contribution to honor the lifelong interest of Berend Olivier in the control mechanisms of sexual behavior, we decided to explore the role of OT in the present review. In the successive sections, some physiological mechanisms and the 'pair-bonding' effects of OT will be discussed, followed by sections about desire, female appetitive and copulatory behavior, including lordosis and orgasm. At the male side, the effects on erection and ejaculation are reviewed, followed by a section about 'premature ejaculation' and a possible role of OT in its treatment. In addition to OT, serotonin receives some attention as one of the main mechanisms controlling the effects of OT. In the succeeding sections, the importance of OT for 'the fruits of labor' is discussed, as it plays an important role in both maternal and paternal behavior. Finally, we pay attention to an intriguing brain area, the ventrolateral part of the ventromedial hypothalamic nucleus (VMHvl), apparently functioning in both sexual and aggressive behavior, which are at first view completely opposite behavioral systems.
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Affiliation(s)
- J G Veening
- Department of Psychopharmacology, Division of Pharmacology, University of Utrecht, Utrecht, The Netherlands; Department of Anatomy, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - T R de Jong
- Department of Behavioral and Molecular Neurobiology, University of Regensburg, 93053 Regensburg, Germany
| | - M D Waldinger
- Department of Psychopharmacology, Division of Pharmacology, University of Utrecht, Utrecht, The Netherlands
| | - S M Korte
- Department of Psychopharmacology, Division of Pharmacology, University of Utrecht, Utrecht, The Netherlands
| | - B Olivier
- Department of Psychopharmacology, Division of Pharmacology, University of Utrecht, Utrecht, The Netherlands
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Liang M, Zhong J, Liu HX, Lopatina O, Nakada R, Yamauchi AM, Higashida H. Pairmate-dependent pup retrieval as parental behavior in male mice. Front Neurosci 2014; 8:186. [PMID: 25071431 PMCID: PMC4092370 DOI: 10.3389/fnins.2014.00186] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 06/11/2014] [Indexed: 01/20/2023] Open
Abstract
Appropriate parental care by fathers can greatly facilitate healthy human family life. However, much less is known about paternal behavior in animals compared to those regarding maternal behavior. Previously, we reported that male ICR strain laboratory mice, although not spontaneously parental, can be induced to display maternal-like parental care (pup retrieval) when separated from their pups by signals from the pairmate dam (Liu et al., 2013). This parental behavior by the ICR sires, which are not genetically biparental, is novel and has been designated as pairmate-dependent paternal behavior. However, the factors critical for this paternal behavior are unclear. Here, we report that the pairmate-dependent paternal retrieval behavior is observed especially in the ICR strain and not in C57BL/6 or BALB/c mice. An ICR sire displays retrieval behavior only toward his biological pups. A sire co-housed with an unrelated non-pairing dam in a new environment, under which 38-kHz ultrasonic vocalizations are not detected, does not show parenting behavior. It is important for sires to establish their own home territory (cage) by continuous housing and testing to display retrieval behavior. These results indicated that the ICR sires display distinct paternity, including father-child social interaction, and shed light on parental behavior, although further analyses of paternal care at the neuroendocrinological and neurocircuitry levels are required.
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Affiliation(s)
- Mingkun Liang
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan ; Department of Biophysical Genetics, Graduate School of Medical Sciences, Kanazawa University Kanazawa, Japan
| | - Jing Zhong
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan ; Department of Biophysical Genetics, Graduate School of Medical Sciences, Kanazawa University Kanazawa, Japan
| | - Hong-Xiang Liu
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Olga Lopatina
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Ryusuke Nakada
- Department of Biophysical Genetics, Graduate School of Medical Sciences, Kanazawa University Kanazawa, Japan
| | - Agnes-Mikiko Yamauchi
- Department of Biophysical Genetics, Graduate School of Medical Sciences, Kanazawa University Kanazawa, Japan
| | - Haruhiro Higashida
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
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34
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Lieberwirth C, Wang Z. Social bonding: regulation by neuropeptides. Front Neurosci 2014; 8:171. [PMID: 25009457 PMCID: PMC4067905 DOI: 10.3389/fnins.2014.00171] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 06/05/2014] [Indexed: 11/13/2022] Open
Abstract
Affiliative social relationships (e.g., among spouses, family members, and friends) play an essential role in human society. These relationships affect psychological, physiological, and behavioral functions. As positive and enduring bonds are critical for the overall well-being of humans, it is not surprising that considerable effort has been made to study the neurobiological mechanisms that underlie social bonding behaviors. The present review details the involvement of the nonapeptides, oxytocin (OT), and arginine vasopressin (AVP), in the regulation of social bonding in mammals including humans. In particular, we will discuss the role of OT and AVP in the formation of social bonds between partners of a mating pair as well as between parents and their offspring. Furthermore, the role of OT and AVP in the formation of interpersonal bonding involving trust is also discussed.
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Affiliation(s)
| | - Zuoxin Wang
- Department of Psychology and Program in Neuroscience, Florida State UniversityTallahassee, FL, USA
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35
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Lopatina O, Yoshihara T, Nishimura T, Zhong J, Akther S, Fakhrul AAKM, Liang M, Higashida C, Sumi K, Furuhara K, Inahata Y, Huang JJ, Koizumi K, Yokoyama S, Tsuji T, Petugina Y, Sumarokov A, Salmina AB, Hashida K, Kitao Y, Hori O, Asano M, Kitamura Y, Kozaka T, Shiba K, Zhong F, Xie MJ, Sato M, Ishihara K, Higashida H. Anxiety- and depression-like behavior in mice lacking the CD157/BST1 gene, a risk factor for Parkinson's disease. Front Behav Neurosci 2014; 8:133. [PMID: 24795584 PMCID: PMC4001052 DOI: 10.3389/fnbeh.2014.00133] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 04/02/2014] [Indexed: 11/13/2022] Open
Abstract
CD157, known as bone marrow stromal cell antigen-1, is a glycosylphosphatidylinositol-anchored ADP-ribosyl cyclase that supports the survival and function of B-lymphocytes and hematopoietic or intestinal stem cells. Although CD157/Bst1 is a risk locus in Parkinson's disease (PD), little is known about the function of CD157 in the nervous system and contribution to PD progression. Here, we show that no apparent motor dysfunction was observed in young knockout (CD157 (-/-)) male mice under less aging-related effects on behaviors. CD157 (-/-) mice exhibited anxiety-related and depression-like behaviors compared with wild-type mice. These behaviors were rescued through treatment with anti-psychiatric drugs and oxytocin. CD157 was weakly expressed in the amygdala and c-Fos immunoreactivity in the amygdala was less evident in CD157 (-/-) mice than in wild-type mice. These results demonstrate for the first time that CD157 plays a role as a neuro-regulator and suggest a potential role in pre-motor symptoms in PD.
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Affiliation(s)
- Olga Lopatina
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan ; Core Research for Evolutional Science and Technology Tokyo, Japan ; Department of Biochemistry, Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University Krasnoyarsk, Russia
| | - Toru Yoshihara
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan ; Advanced Science Research Center, Kanazawa University Kanazawa, Japan
| | - Tomoko Nishimura
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Jing Zhong
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Shirin Akther
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Azam A K M Fakhrul
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Mingkun Liang
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Chiharu Higashida
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan ; Core Research for Evolutional Science and Technology Tokyo, Japan
| | - Kohei Sumi
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Kazumi Furuhara
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Yuki Inahata
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Jian-Jung Huang
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Keita Koizumi
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Shigeru Yokoyama
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Takahiro Tsuji
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Yulia Petugina
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan ; Department of Biochemistry, Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University Krasnoyarsk, Russia
| | - Andrei Sumarokov
- Department of Biochemistry, Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University Krasnoyarsk, Russia
| | - Alla B Salmina
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan ; Department of Biochemistry, Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University Krasnoyarsk, Russia
| | - Koji Hashida
- Core Research for Evolutional Science and Technology Tokyo, Japan ; Department of Neuroanatomy, Kanazawa University Graduate School of Medical Sciences Kanazawa, Japan
| | - Yasuko Kitao
- Core Research for Evolutional Science and Technology Tokyo, Japan ; Department of Neuroanatomy, Kanazawa University Graduate School of Medical Sciences Kanazawa, Japan
| | - Osamu Hori
- Core Research for Evolutional Science and Technology Tokyo, Japan ; Department of Neuroanatomy, Kanazawa University Graduate School of Medical Sciences Kanazawa, Japan
| | - Masahide Asano
- Advanced Science Research Center, Kanazawa University Kanazawa, Japan
| | - Yoji Kitamura
- Advanced Science Research Center, Kanazawa University Kanazawa, Japan
| | - Takashi Kozaka
- Advanced Science Research Center, Kanazawa University Kanazawa, Japan
| | - Kazuhiro Shiba
- Advanced Science Research Center, Kanazawa University Kanazawa, Japan
| | - Fangfang Zhong
- Division of Cell Biology and Neuroscience, Department of Morphological and Physiological Sciences, Faculty of Medical Sciences, University of Fukui Fukui, Japan
| | - Min-Jue Xie
- Division of Cell Biology and Neuroscience, Department of Morphological and Physiological Sciences, Faculty of Medical Sciences, University of Fukui Fukui, Japan
| | - Makoto Sato
- Division of Cell Biology and Neuroscience, Department of Morphological and Physiological Sciences, Faculty of Medical Sciences, University of Fukui Fukui, Japan ; Research Center for Child Mental Development, University of Fukui Fukui, Japan
| | - Katsuhiko Ishihara
- Department of Immunology and Molecular Genetics, Kawasaki Medical School Kurashiki, Japan
| | - Haruhiro Higashida
- Department of Basic Research on Social Recognition and Memory, Research Center for Child Mental Development, Kanazawa University Kanazawa, Japan ; Core Research for Evolutional Science and Technology Tokyo, Japan ; Department of Biochemistry, Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University Krasnoyarsk, Russia
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Akther S, Fakhrul AAKM, Higashida H. Effects of electrical lesions of the medial preoptic area and the ventral pallidum on mate-dependent paternal behavior in mice. Neurosci Lett 2014; 570:21-5. [PMID: 24721669 DOI: 10.1016/j.neulet.2014.03.078] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 03/25/2014] [Accepted: 03/29/2014] [Indexed: 11/18/2022]
Abstract
In laboratory animals, less is known about the neural circuits that mediate paternal behavior than those that influence maternal behavior. In mice, we recently reported that when sires are separated with their mate dams from their pups, ultrasound and pheromonal signals from the dams can evoke and initiate maternal-like retrieval behavior in the sires upon reunion with the offspring; this is termed mate-dependent paternal care. We used electrolytic brain lesion (EBL) methods to identify the potential roles of the medial preoptic area (mPOA) and ventral pallidum (VP) regions in regulating paternal care, areas known to be critical for the expression of maternal behavior. Electrolytic lesions of the mPOA or VP disrupted mate-dependent paternal care; latencies to initiate pup retrieval, grooming and crouching were longer in the EBL-treated sires relative to the sham-operated mice. The number of grooming episodes and duration of crouching were also lower in sires with the EBL in both areas. These results indicate that the mPOA and VP regions are essential for mate-dependent paternal care in mice.
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Affiliation(s)
- Shirin Akther
- Department of Basic Research on Social Cognition, Kanazawa University Center for Child Mental Development, Kanazawa 920-8640, Japan
| | - Azam A K M Fakhrul
- Department of Basic Research on Social Cognition, Kanazawa University Center for Child Mental Development, Kanazawa 920-8640, Japan
| | - Haruhiro Higashida
- Department of Basic Research on Social Cognition, Kanazawa University Center for Child Mental Development, Kanazawa 920-8640, Japan.
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Mapping NAD(+) metabolism in the brain of ageing Wistar rats: potential targets for influencing brain senescence. Biogerontology 2013; 15:177-98. [PMID: 24337988 DOI: 10.1007/s10522-013-9489-5] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 12/09/2013] [Indexed: 12/21/2022]
Abstract
Over the last decade, the importance of NAD(+) has expanded beyond its role as an essential cofactor for energy metabolism. NAD(+) has emerged as a major signalling molecule that serves as the sole substrate for several enzymatic reactions including the DNA repair enzyme, poly(ADP-ribose) polymerase (PARP), NAD-dependent protein deacetylases or CD38, and transcriptional factors by a new class of histone deacetylases known as sirtuins. NAD(+) levels are regulated by the metabolic status and cellular stress caused by oxidative stress and DNA damage. Since a detailed study of NAD(+) metabolism in the healthy ageing mammalian brain is nascent, we examined the effect of ageing on intracellular NAD(+) metabolism in different brain regions in female Wistar rats in young (3 months), middle aged (12 months) and older adults (24 months). Our results are the first to show a significant decline in intracellular NAD(+) levels and NAD:NADH ratio with ageing in the CNS, occurring in parallel to an increase in lipid peroxidation and protein oxidation (o- and m-tyrosine) and a decline in total antioxidant capacity. Hyperphosphorylation of H2AX levels was also observed together with increased PARP-1 and PARP-2 expression, and CD38 activity, concomitantly with reduced NAD(+) and ATP levels and SIRT1 function in the cortex, brainstem, hippocampus and cerebellum. Reduced activity of mitochondrial complex I-IV and impaired maximum mitochondrial respiration rate were also observed in the ageing rat brain. Among the multiple physiological pathways associated with NAD(+) catabolism, our discovery of CD38 as the major regulator of cellular NAD(+) levels in rat neurons indicates that CD38 is a promising therapeutic target for the treatment of age-related neurodegenerative diseases.
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