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Müller TE, Dos Santos MM, Ferreira SA, Claro MT, de Macedo GT, Fontana BD, Barbosa NV. Negative impacts of social isolation on behavior and neuronal functions are recovered after short-term social reintroduction in zebrafish. Prog Neuropsychopharmacol Biol Psychiatry 2024; 134:111038. [PMID: 38810717 DOI: 10.1016/j.pnpbp.2024.111038] [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: 11/10/2023] [Revised: 05/16/2024] [Accepted: 05/22/2024] [Indexed: 05/31/2024]
Abstract
Recently, social isolation measures were crucial to prevent the spread of the coronavirus pandemic. However, the lack of social interactions affected the population mental health and may have long-term consequences on behavior and brain functions. Here, we evaluated the behavioral, physiological, and molecular effects of a social isolation (SI) in adult zebrafish, and whether the animals recover such changes after their reintroduction to the social environment. Fish were submitted to 12 days of SI, and then reintroduced to social context (SR). Behavioral analyses to evaluate locomotion, anxiety-like and social-related behaviors were performed after SI protocol, and 3 and 6 days after SR. Cortisol and transcript levels from genes involved in neuronal homeostasis (c-fos, egr, bdnf), and serotonergic (5-HT) and dopaminergic (DA) neurotransmission (thp, th) were also measured. SI altered social behaviors in zebrafish such as aggression, social preference, and shoaling. Fish submitted to SI also presented changes in the transcript levels of genes related to neural activity, and 5-HT/DA signaling. Interestingly, most of the behavioral and molecular changes induced by SI were not found again 6 days after SR. Thus, we highlight that SR of zebrafish to their conspecifics played a positive role in social behaviors and in the expression of genes involved in different neuronal signaling pathways that were altered after 12 days of SI. This study brings unprecedented data on the effects of SR in the recovery from SI neurobehavioral alterations, and reinforces the role of zebrafish as a translational model for understanding the neurobiological mechanisms adjacent to SI and resocialization.
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Affiliation(s)
- Talise E Müller
- Laboratory of Toxicological Biochemistry, Department of Biochemistry and Molecular Biology, Center of Natural and Exact Sciences, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil.; Graduate Program in Biological Sciences: Toxicological Biochemistry, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil..
| | - Matheus M Dos Santos
- Laboratory of Toxicological Biochemistry, Department of Biochemistry and Molecular Biology, Center of Natural and Exact Sciences, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil.; Graduate Program in Biological Sciences: Toxicological Biochemistry, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil
| | - Sabrina A Ferreira
- Laboratory of Toxicological Biochemistry, Department of Biochemistry and Molecular Biology, Center of Natural and Exact Sciences, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil.; Graduate Program in Biological Sciences: Toxicological Biochemistry, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil
| | - Mariana T Claro
- Laboratory of Toxicological Biochemistry, Department of Biochemistry and Molecular Biology, Center of Natural and Exact Sciences, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil.; Graduate Program in Biological Sciences: Toxicological Biochemistry, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil
| | - Gabriel T de Macedo
- Laboratory of Toxicological Biochemistry, Department of Biochemistry and Molecular Biology, Center of Natural and Exact Sciences, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil.; Graduate Program in Biological Sciences: Toxicological Biochemistry, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil
| | - Barbara D Fontana
- Department of Biological Sciences, Wayne State University, Detroit, MI 48202, USA
| | - Nilda V Barbosa
- Laboratory of Toxicological Biochemistry, Department of Biochemistry and Molecular Biology, Center of Natural and Exact Sciences, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil.; Graduate Program in Biological Sciences: Toxicological Biochemistry, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS 97105-900, Brazil..
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da Silva RPB, Pinheiro IL, da Silva RKB, Moretti EC, de Oliveira Neto OB, Ferraz-Pereira K, Galindo LCM. Social isolation and post-weaning environmental enrichment effects on rat emotional behavior and serotonergic system. Int J Dev Neurosci 2024; 84:265-280. [PMID: 38526313 DOI: 10.1002/jdn.10324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 01/29/2024] [Accepted: 02/20/2024] [Indexed: 03/26/2024] Open
Abstract
Social isolation (SI) is related to adverse neurobehavioral effects and neurochemical changes when it occurs early in development. On the other hand, environmental enrichment (EE) is associated with a reduction in anxiety-like and depression-like behavior, as well as an increase in serotonin (5-HT) levels in the prefrontal cortex and hippocampus in rodents. This study systematically reviewed the effects of SI and EE on emotional behavior and serotonergic system components in rats after weaning. Primary experimental studies that used subgroups of rats subjected to SI, EE, and normal social conditions after weaning were considered eligible. Studies that used transgenic rodents, ex vivo studies, in vitro studies, human research, or in silico studies were ineligible. Two authors completed searches in Medline/PubMed, LILACS, Scopus, Web of Science, EMBASE, and Open Gray. The Kappa index was calculated to assess agreement between reviewers and assess study quality. The results showed that the animals exposed to EE showed better adaptation to a new environment. Furthermore, EE increased 5-HT levels in the hippocampus and prefrontal cortex of rodents. Thus, it appears that an EE during the critical period of development may reduce anxiety/depression-like behaviors, as well as increase long-term neurotransmitter response.
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Affiliation(s)
- Roxana Patrícia Bezerra da Silva
- Post-Graduate Program in Nutrition, Physical Activity and Phenotypic Plasticity, Federal University of Pernambuco, Vitória de Santo Antão, Brazil
| | - Isabeli Lins Pinheiro
- Post-Graduate Program in Nutrition, Physical Activity and Phenotypic Plasticity, Federal University of Pernambuco, Vitória de Santo Antão, Brazil
- Nutrition and Phenotypic Plasticity Study Unit, Department of Nutrition, Federal University of Pernambuco, Recife, Brazil
| | - Regina Katiuska Bezerra da Silva
- Post-Graduate Program in Nutrition, Physical Activity and Phenotypic Plasticity, Federal University of Pernambuco, Vitória de Santo Antão, Brazil
| | | | | | - Kelli Ferraz-Pereira
- Nutrition and Phenotypic Plasticity Study Unit, Department of Nutrition, Federal University of Pernambuco, Recife, Brazil
- Department Speech Therapy, Federal University of Pernambuco, Recife, Brazil
| | - Lígia Cristina Monteiro Galindo
- Post-Graduate Program in Nutrition, Physical Activity and Phenotypic Plasticity, Federal University of Pernambuco, Vitória de Santo Antão, Brazil
- Nutrition and Phenotypic Plasticity Study Unit, Department of Nutrition, Federal University of Pernambuco, Recife, Brazil
- Department of Anatomy, Federal University of Pernambuco, Recife, Brazil
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3
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Tamura H, Miyazaki A, Kawamura T, Gotoh H, Yamamoto N, Narita M. Chronic ingestion of soy peptide supplementation reduces aggressive behavior and abnormal fear memory caused by juvenile social isolation. Sci Rep 2024; 14:11557. [PMID: 38773352 PMCID: PMC11109177 DOI: 10.1038/s41598-024-62534-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 05/17/2024] [Indexed: 05/23/2024] Open
Abstract
Juvenile loneliness is a risk factor for psychopathology in later life. Deprivation of early social experience due to peer rejection has a detrimental impact on emotional and cognitive brain function in adulthood. Accumulating evidence indicates that soy peptides have many positive effects on higher brain function in rodents and humans. However, the effects of soy peptide use on juvenile social isolation are unknown. Here, we demonstrated that soy peptides reduced the deterioration of behavioral and cellular functions resulting from juvenile socially-isolated rearing. We found that prolonged social isolation post-weaning in male C57BL/6J mice resulted in higher aggression and impulsivity and fear memory deficits at 7 weeks of age, and that these behavioral abnormalities, except impulsivity, were mitigated by ingestion of soy peptides. Furthermore, we found that daily intake of soy peptides caused upregulation of postsynaptic density 95 in the medial prefrontal cortex and phosphorylation of the cyclic adenosine monophosphate response element binding protein in the hippocampus of socially isolated mice, increased phosphorylation of the adenosine monophosphate-activated protein kinase in the hippocampus, and altered the microbiota composition. These results suggest that soy peptides have protective effects against juvenile social isolation-induced behavioral deficits via synaptic maturation and cellular functionalization.
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Affiliation(s)
- Hideki Tamura
- Laboratory of Biofunctional Science, School of Pharmacy and Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa, Tokyo, 142-8501, Japan.
- Institute for Advanced Life Sciences, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan.
| | - Akiko Miyazaki
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Takashi Kawamura
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Hikaru Gotoh
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Naoki Yamamoto
- Department of Biology, Faculty of Science, Kyushu University, Fukuoka, 819-0395, Japan
| | - Minoru Narita
- Institute for Advanced Life Sciences, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
- Department of Pharmacy, National Cancer Center Hospital, Tokyo, Japan
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Mori D, Ikeda R, Sawahata M, Yamaguchi S, Kodama A, Hirao T, Arioka Y, Okumura H, Inami C, Suzuki T, Hayashi Y, Kato H, Nawa Y, Miyata S, Kimura H, Kushima I, Aleksic B, Mizoguchi H, Nagai T, Nakazawa T, Hashimoto R, Kaibuchi K, Kume K, Yamada K, Ozaki N. Phenotypes for general behavior, activity, and body temperature in 3q29 deletion model mice. Transl Psychiatry 2024; 14:138. [PMID: 38453903 PMCID: PMC10920862 DOI: 10.1038/s41398-023-02679-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 11/15/2023] [Accepted: 11/23/2023] [Indexed: 03/09/2024] Open
Abstract
Whole genome analysis has identified rare copy number variations (CNV) that are strongly involved in the pathogenesis of psychiatric disorders, and 3q29 deletion has been found to have the largest effect size. The 3q29 deletion mice model (3q29-del mice) has been established as a good pathological model for schizophrenia based on phenotypic analysis; however, circadian rhythm and sleep, which are also closely related to neuropsychiatric disorders, have not been investigated. In this study, our aims were to reevaluate the pathogenesis of 3q29-del by recreating model mice and analyzing their behavior and to identify novel new insights into the temporal activity and temperature fluctuations of the mouse model using a recently developed small implantable accelerometer chip, Nano-tag. We generated 3q29-del mice using genome editing technology and reevaluated common behavioral phenotypes. We next implanted Nano-tag in the abdominal cavity of mice for continuous measurements of long-time activity and body temperature. Our model mice exhibited weight loss similar to that of other mice reported previously. A general behavioral battery test in the model mice revealed phenotypes similar to those observed in mouse models of schizophrenia, including increased rearing frequency. Intraperitoneal implantation of Nano-tag, a miniature acceleration sensor, resulted in hypersensitive and rapid increases in the activity and body temperature of 3q29-del mice upon switching to lights-off condition. Similar to the 3q29-del mice reported previously, these mice are a promising model animals for schizophrenia. Successive quantitative analysis may provide results that could help in treating sleep disorders closely associated with neuropsychiatric disorders.
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Affiliation(s)
- Daisuke Mori
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan.
- Brain and Mind Research Center, Nagoya University, Nagoya, Japan.
- Department of Pathophysiology of Mental Disorders, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan.
| | - Ryosuke Ikeda
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Masahito Sawahata
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University, Graduate School of Medicine, Nagoya, Japan
- Department of Applied Pharmacology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Sho Yamaguchi
- Department of Neuropharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - Akiko Kodama
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takashi Hirao
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yuko Arioka
- Department of Pathophysiology of Mental Disorders, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
- Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, Japan
| | - Hiroki Okumura
- Department of Pathophysiology of Mental Disorders, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University, Graduate School of Medicine, Nagoya, Japan
| | - Chihiro Inami
- Department of Pathophysiology of Mental Disorders, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University, Graduate School of Medicine, Nagoya, Japan
- Department of Neuropharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - Toshiaki Suzuki
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yu Hayashi
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hidekazu Kato
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshihiro Nawa
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Seiko Miyata
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroki Kimura
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Itaru Kushima
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Medical Genomics Center, Nagoya University Hospital, Nagoya, Japan
| | - Branko Aleksic
- Department of Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroyuki Mizoguchi
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University, Graduate School of Medicine, Nagoya, Japan
| | - Taku Nagai
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University, Graduate School of Medicine, Nagoya, Japan
- Division of Behavioral Neuropharmacology, International Center for Brain Science (ICBS), Fujita Health University, Toyoake, Japan
| | - Takanobu Nakazawa
- Laboratory of Molecular Biology, Department of Bioscience, Graduate School of Life Sciences, Tokyo University of Agriculture, Tokyo, Japan
| | - Ryota Hashimoto
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Kozo Kaibuchi
- Division of Cell Biology, International Center for Brain Science, Fujita Health University, 1-98 Dengakugakubo, Kusukake-cho, Toyoake, Aichi, Japan
| | - Kazuhiko Kume
- Department of Neuropharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - Kiyofumi Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University, Graduate School of Medicine, Nagoya, Japan
| | - Norio Ozaki
- Department of Pathophysiology of Mental Disorders, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
- Institute for Glyco-core Research (iGCORE), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
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5
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Pan J, Lu D, Yu L, Ye Z, Duan H, Narbad A, Zhao J, Zhai Q, Tian F, Chen W. Nonylphenol induces depressive behavior in rats and affects gut microbiota: A dose-dependent effect. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 344:123357. [PMID: 38228262 DOI: 10.1016/j.envpol.2024.123357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 10/30/2023] [Accepted: 01/13/2024] [Indexed: 01/18/2024]
Abstract
Nonylphenol (NP), an endocrine disruptor absorbed through food intake, was investigated in this study for its potential dose-response relationship with the manifestation of depression-like behavior in rats. Based on this, the mechanisms of NP-induced depressive behavior, encompassing neurotransmitters, gut barrier function, inflammatory response, gut microbiota composition and metabolites were further explored. At medium and high NP doses, both mRNA and protein levels of zonula occludens protein-1 and claudin-1 were considerably downregulated, concomitant with an elevation in tumor necrosis factor-α and interleukin-1β expression in a dose-dependent effect, resulting in damage to the gut mucosa. Despite a minimal impact on behavior and gut barriers at low NP doses, alterations in gut microbiota composition were observed. During NP exposure, dose-dependent changes in the gut microbiota revealed a decline in microbial diversity linked to the synthesis of short-chain fatty acids. NP not only adversely affected the gut microbiota structure but also exacerbated central nervous system damage through the gut-brain axis. The accumulation of NP may cause neurotransmitter disturbances and inflammatory responses in the hippocampus, which also exacerbate depressed behavior in rats. Therefore, NP could exacerbate the inflammatory response in the hippocampus and colon by compromising intestinal barrier integrity, facilitating the proliferation of pathogenic bacteria, impairing butyrate metabolism, and perturbing neurotransmitter homeostasis, thus aggravating the depressive behavior of rats. It is noteworthy that the changes in these indicators were related to the NP exposure dose.
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Affiliation(s)
- Jiani Pan
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Dezhi Lu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Leilei Yu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China; International Joint Research Laboratory for Probiotics at Jiangnan University, Wuxi, Jiangsu, 214122, China.
| | - Zi Ye
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Hui Duan
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Arjan Narbad
- International Joint Research Laboratory for Probiotics at Jiangnan University, Wuxi, Jiangsu, 214122, China; Gut Health and Microbiome Institute Strategic Programme, Quadram Institute Bioscience, Norwich, 16 NR4 7UQ, UK
| | - Jianxin Zhao
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China; International Joint Research Laboratory for Probiotics at Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Qixiao Zhai
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China; International Joint Research Laboratory for Probiotics at Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Fengwei Tian
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China; International Joint Research Laboratory for Probiotics at Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Wei Chen
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China; International Joint Research Laboratory for Probiotics at Jiangnan University, Wuxi, Jiangsu, 214122, China; National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, Jiangsu, 214122, China
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6
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Kishida T, Motokawa Y, Yokoi R, Souma S. Less invasive, simultaneous, and continuous measurements of locomotor activity and body temperature using the nano tag® small accelerometer device in cynomolgus monkeys. J Pharmacol Toxicol Methods 2022; 118:107224. [PMID: 36116702 DOI: 10.1016/j.vascn.2022.107224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 09/02/2022] [Accepted: 09/08/2022] [Indexed: 10/31/2022]
Abstract
Locomotor activity and body temperature evaluations of cynomolgus monkeys are useful to understand the effects of drugs on the central nervous system. Here, we describe a simple, inexpensive, and less invasive evaluation method using the nano tag® (KISSEI COMTEC Co., Ltd.), a small three-axis accelerometer device with a temperature sensor. Nano tags® were subcutaneously implanted in four cynomolgus monkeys that had been intraperitoneally implanted with a telemetry transmitter. Then, body temperature and locomotor activity counts were simultaneously and continuously measured by both the nano tag® and telemetry transmitter for 14 days after nano tag® implantation. The invasiveness of the implantation surgery was evaluated by recovery after surgery, and the validity of each nano tag® parameter was evaluated by comparison with the telemetry system data. Additionally, locomotor activity and body temperature changes induced by treatment with ketamine, a noncompetitive N-methyl-d-aspartate receptor antagonist, were evaluated by the nano tag®. Recovery from nano tag® implantation surgery was observed at 7 days postoperative, indicating that nano tag® was less invasive than a telemetry transmitter. Both of the parameter profiles measured by nano tag® were approximately comparable to those of the telemetry system. Moreover, the nano tag® could detect ketamine-induced pharmacological changes of decreases in both parameters. The present study demonstrates that nano tag® is an effective, simple, and less invasive tool for locomotor activity and body temperature evaluations in cynomolgus monkeys. This proposed easier method could help researchers evaluate central nervous system effects in cynomolgus monkeys.
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Affiliation(s)
- Tomoyuki Kishida
- Safety Research Department, Kissei Pharmaceutical Co., Ltd, 2320-1, Maki, Hotaka, Azumino, Nagano 399-8305, Japan.
| | - Yoshiyuki Motokawa
- Safety Research Department, Kissei Pharmaceutical Co., Ltd, 2320-1, Maki, Hotaka, Azumino, Nagano 399-8305, Japan.
| | - Ryohei Yokoi
- Safety Research Department, Kissei Pharmaceutical Co., Ltd, 2320-1, Maki, Hotaka, Azumino, Nagano 399-8305, Japan.
| | - Shinji Souma
- Safety Research Department, Kissei Pharmaceutical Co., Ltd, 2320-1, Maki, Hotaka, Azumino, Nagano 399-8305, Japan.
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7
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Miyazaki K, Itoh N, Saiki P, Kuroki Y. Supplementation with Eurycoma longifolia Extract Modulates Diurnal Body Temperature Fluctuation and Sleep Rhythm in Mice. J Nutr Sci Vitaminol (Tokyo) 2022; 68:342-347. [PMID: 36047106 DOI: 10.3177/jnsv.68.342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Eurycoma longifolia (Tongkat Ali; TA) is a traditional medicinal herb, commonly known as Malaysian ginseng. The root tea has been traditionally applied to treat fevers, aches, sexual dysfunction and other ailments. We evaluated the effects of TA extract supplementation on diurnal core body temperature (BT) and sleep architecture in model mice. Dietary supplementation with TA extract for 4 wk resulted in significantly and moderately reduced BT during the rest and active phases, respectively. A high dose delayed the onset of BT elevation at the start of the active phase, indicating that the effect was dose-dependent. Electroencephalography findings revealed that dietary supplementation with TA extract changed sleep rhythms and delta power during the inactive phase of NREM sleep, indicating improved sleep quality. Our findings suggested that dietary TA extract could be a promising natural aid that alleviates sleep problems via thermoregulation.
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Affiliation(s)
- Koyomi Miyazaki
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology
| | - Nanako Itoh
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology
| | - Papawee Saiki
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology
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8
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Bianchini MC, Soares LFW, Sousa JMFM, Ramborger BP, Gayer MC, Bridi JC, Roehrs R, Pinton S, Aschner M, Ávila DS, Puntel RL. MeHg exposure impairs both the catecholaminergic and cholinergic systems resulting in motor and non-motor behavioral changes in Drosophila melanogaster. Chem Biol Interact 2022; 365:110121. [PMID: 35995257 DOI: 10.1016/j.cbi.2022.110121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/12/2022] [Accepted: 08/16/2022] [Indexed: 11/03/2022]
Abstract
Human exposure to the natural environmental contaminant methylmercury (MeHg) has been associated to adverse health effects. Importantly, the mechanisms by which this organomercurial exerts its neurotoxicity have yet to be fully clarified. Therefore, the aim of this study was to evaluate whether exposure to MeHg alters dopamine (DA) and octopamine (OA) levels, acetylcholinesterase (AChE) activity and impacts both motor and non-motor behaviours. We studied the effect of MeHg by feeding 1-2 d old flies (male and females) with 25 and 50 μM MeHg for 4 d and determined effects on survival, motor and non-motor behaviours, oxidative stress, AChE and tyrosine hydroxylase (TH) activities, as well as DA and OA levels. We found that Drosophila melanogaster (D. melanogaster) exposed to MeHg showed a reduction in survival rate, associated with the inhibition of AChE and TH activities in head of flies and decreased DA and OA levels. These changes were accompanied by behavioural alterations, such as locomotor deficit and increased grooming behaviour, in addition to an increase in oxidative stress markers both in head and in body of flies, and an increase in glutathione-S-transferase (GST) activity in head of flies. Collectively, our data support the hypothesis that MeHg neurotoxicity is associated with altered OA and DA levels, AChE inhibition, which may serve, at least in part, as the underpinnings of both motor and non-motor behavioural changes.
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Affiliation(s)
- Matheus C Bianchini
- Universidade Federal do Pampa - Campus Uruguaiana, Programa de Pós-Graduação em Bioquímica (PPGBioq), Uruguaiana, RS, Brazil
| | - Luiz F W Soares
- Universidade Federal do Pampa - Campus Uruguaiana, Programa de Pós-Graduação em Bioquímica (PPGBioq), Uruguaiana, RS, Brazil
| | - João M F M Sousa
- Universidade Federal do Pampa - Campus Uruguaiana, Programa de Pós-Graduação em Bioquímica (PPGBioq), Uruguaiana, RS, Brazil
| | - Bruna P Ramborger
- Universidade Federal do Pampa - Campus Uruguaiana, Programa de Pós-Graduação em Bioquímica (PPGBioq), Uruguaiana, RS, Brazil
| | - Mateus C Gayer
- Universidade Federal do Pampa - Campus Uruguaiana, Programa de Pós-Graduação em Bioquímica (PPGBioq), Uruguaiana, RS, Brazil
| | - Jessika C Bridi
- Laboratory of Molecular and Functional Neurobiology, Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, 05508-000, Brazil
| | - Rafael Roehrs
- Universidade Federal do Pampa - Campus Uruguaiana, Programa de Pós-Graduação em Bioquímica (PPGBioq), Uruguaiana, RS, Brazil
| | - Simone Pinton
- Universidade Federal do Pampa - Campus Uruguaiana, Programa de Pós-Graduação em Bioquímica (PPGBioq), Uruguaiana, RS, Brazil
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, 10461, NY, United States
| | - Daiana S Ávila
- Universidade Federal do Pampa - Campus Uruguaiana, Programa de Pós-Graduação em Bioquímica (PPGBioq), Uruguaiana, RS, Brazil
| | - Robson L Puntel
- Universidade Federal do Pampa - Campus Uruguaiana, Programa de Pós-Graduação em Bioquímica (PPGBioq), Uruguaiana, RS, Brazil.
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Ujisawa T, Sasajima S, Kashio M, Tominaga M. Thermal gradient ring reveals different temperature-dependent behaviors in mice lacking thermosensitive TRP channels. J Physiol Sci 2022; 72:11. [PMID: 35624442 PMCID: PMC10717490 DOI: 10.1186/s12576-022-00835-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 05/09/2022] [Indexed: 01/02/2023]
Abstract
Transient receptor potential (TRP) channels are known as temperature receptors. Each channel has an activation temperature in vitro within the physiological temperature range. Mice deficient in specific TRP channels show abnormal thermal behaviors. However, the role of TRP channels in mouse thermal behavior is not fully understood. We measured thermal behavior using a new type of thermal gradient system, where mice can freely move around the ring floor, thereby avoiding the stereotypical habit that mice have of staying in a corner, as occurs in a rectangular system. With this system, we can also analyze various factors, such as "Spent time," "Travel distance," "Moving speed," and "Acceleration," to provide more accurate information about mouse behaviors. Further analysis using this system would lead to a better understanding of the molecular basis of thermal behaviors in mice, which could help us develop ways of making humans comfortable in different temperature conditions.
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Affiliation(s)
- Tomoyo Ujisawa
- Division of Cell Signaling, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan
- Thermal Biology Group, Exploratory Research Center On Life and Living Systems (ExCELLS), 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan
| | - Sachiko Sasajima
- Division of Cell Signaling, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan
- Thermal Biology Group, Exploratory Research Center On Life and Living Systems (ExCELLS), 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan
- Division of Diabetes, Department of Internal Medicine, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi, 480-1195, Japan
| | - Makiko Kashio
- Division of Cell Signaling, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan
- Thermal Biology Group, Exploratory Research Center On Life and Living Systems (ExCELLS), 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan
- Department of Physiological Sciences, Sokendai (The Graduate University for Advanced Studies), Okazaki, Aichi, 444-8787, Japan
| | - Makoto Tominaga
- Division of Cell Signaling, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan.
- Thermal Biology Group, Exploratory Research Center On Life and Living Systems (ExCELLS), 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi, 444-8787, Japan.
- Department of Physiological Sciences, Sokendai (The Graduate University for Advanced Studies), Okazaki, Aichi, 444-8787, Japan.
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Vitale EM, Smith AS. Neurobiology of Loneliness, Isolation, and Loss: Integrating Human and Animal Perspectives. Front Behav Neurosci 2022; 16:846315. [PMID: 35464141 PMCID: PMC9029604 DOI: 10.3389/fnbeh.2022.846315] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 02/21/2022] [Indexed: 12/30/2022] Open
Abstract
In social species such as humans, non-human primates, and even many rodent species, social interaction and the maintenance of social bonds are necessary for mental and physical health and wellbeing. In humans, perceived isolation, or loneliness, is not only characterized by physical isolation from peers or loved ones, but also involves negative perceptions about social interactions and connectedness that reinforce the feelings of isolation and anxiety. As a complex behavioral state, it is no surprise that loneliness and isolation are associated with dysfunction within the ventral striatum and the limbic system - brain regions that regulate motivation and stress responsiveness, respectively. Accompanying these neural changes are physiological symptoms such as increased plasma and urinary cortisol levels and an increase in stress responsivity. Although studies using animal models are not perfectly analogous to the uniquely human state of loneliness, studies on the effects of social isolation in animals have observed similar physiological symptoms such as increased corticosterone, the rodent analog to human cortisol, and also display altered motivation, increased stress responsiveness, and dysregulation of the mesocortical dopamine and limbic systems. This review will discuss behavioral and neuropsychological components of loneliness in humans, social isolation in rodent models, and the neurochemical regulators of these behavioral phenotypes with a neuroanatomical focus on the corticostriatal and limbic systems. We will also discuss social loss as a unique form of social isolation, and the consequences of bond disruption on stress-related behavior and neurophysiology.
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Affiliation(s)
- Erika M. Vitale
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, KS, United States
| | - Adam S. Smith
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, KS, United States
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Funabashi D, Wakiyama Y, Muto N, Kita I, Nishijima T. Social isolation is a direct determinant of decreased home-cage activity in mice: A within-subjects study using a body-implantable actimeter. Exp Physiol 2021; 107:133-146. [PMID: 34921441 DOI: 10.1113/ep090132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 12/13/2021] [Indexed: 11/08/2022]
Abstract
NEW FINDINGS What is the central question of this study? It is generally recognized that social isolation is associated with physical inactivity; however, is social isolation a direct determinant of decreased physical activity? What is the main finding and its importance? We conducted a within-subjects experiment with the aid of a body-implantable actimeter. Our results clearly demonstrated that social isolation decreased home-cage activity in mice. This might have resulted from increased immobility and decreased vigorous activity, suggesting that avoiding social isolation is important to preventing physical inactivity. ABSTRACT An inactive lifestyle can negatively affect physiological and mental health. Social isolation is associated with physical inactivity; however, it remains uncertain whether social isolation is a direct determinant of decreased physical activity. Hence, we assessed whether social isolation decreases home-cage activity using a within-subjects design and examined the effects of social isolation on hippocampal neurogenesis in mice. This study used a body-implantable actimeter called nanotag®, which enabled us to measure home-cage activity despite housing the mice in groups. We first examined the influence of the intraperitoneal implantation of nanotag® on home-cage activity. Although nanotag® implantation decreased home-cage activity temporarily, 7 days post-implantation, it recovered to the same level as that of control (non-implanted) mice, suggesting that implantation of nanotag® does not have a negative influence on home-cage activity if mice undergo a 1-week recovery period after implantation. In the main experiment, after the 1-week baseline measurement performed while in group housing, the mice were placed in a group or in isolation. Home-cage activity was measured for an additional 4 weeks. Home-cage activity in isolated mice during the dark period decreased by 26% from pre-intervention to the last week of intervention. Furthermore, the reduction in the number of 5-minute epochs during which the activity count exceeded 301 (an index of vigorous activity) was significantly larger for isolated mice. Contrary to expectations, social isolation did not impair hippocampal neurogenesis. Our results demonstrate that social isolation is a direct determinant of decreased physical activity, possibly because of reduced vigorous physical activity. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Daisuke Funabashi
- Department of Health Promotion Science, Graduate School of Human Health Science, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo, 192-0397, Japan
| | - Yusuke Wakiyama
- Department of Health Promotion Science, Graduate School of Human Health Science, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo, 192-0397, Japan
| | - Naoya Muto
- Department of Health Promotion Science, Graduate School of Human Health Science, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo, 192-0397, Japan
| | - Ichiro Kita
- Department of Health Promotion Science, Graduate School of Human Health Science, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo, 192-0397, Japan
| | - Takeshi Nishijima
- Department of Health Promotion Science, Graduate School of Human Health Science, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo, 192-0397, Japan
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