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Chang Z, Liu Q, Fan P, Xu W, Xie Y, Gong K, Zhang C, Zhao Z, Sun K, Shao G. Hypoxia preconditioning increases Notch1 activity by regulating DNA methylation in vitro and in vivo. Mol Biol Rep 2024; 51:507. [PMID: 38622406 DOI: 10.1007/s11033-024-09308-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 02/01/2024] [Indexed: 04/17/2024]
Abstract
BACKGROUND Our previous research has demonstrated that hypoxic preconditioning (HPC) can improve spatial learning and memory abilities in adult mice. Adult hippocampal neurogenesis has been associated with learning and memory. The Neurogenic locus notch homolog protein (Notch) was involved in adult hippocampal neurogenesis, as well as in learning and memory. It is currently unclear whether the Notch pathway regulates hippocampal neuroregeneration by modifying the DNA methylation status of the Notch gene following HPC. METHOD The HPC animal model and cell model were established through repeated hypoxia exposure using mice and the mouse hippocampal neuronal cell line HT22. Step-down test was conducted on HPC mice. Real-time PCR and Western blot analysis were used to assess the mRNA and protein expression levels of Notch1 and hairy and enhancer of split1 (HES1). The presence of BrdU-positive cells and Notch1 expression in the hippocampal dental gyrus (DG) were examined with confocal microscopy. The methylation status of the Notch1 was analyzed using methylation-specific PCR (MS-PCR). HT22 cells were employed to elucidate the impact of HPC on Notch1 in vitro. RESULTS HPC significantly improved the step-down test performance of mice with elevated levels of mRNA and protein expression of Notch1 and HES1 (P < 0.05). The intensities of the Notch1 signal in the control group, the H group and the HPC group were 2.62 ± 0.57 × 107, 2.87 ± 0.84 × 107, and 3.32 ± 0.14 × 107, respectively, and the number of BrdU (+) cells in the hippocampal DG were 1.83 ± 0.54, 3.71 ± 0.64, and 7.29 ± 0.68 respectively. Compared with that in C and H group, the intensity of the Notch1 signal and the number of BrdU (+) cells increased significantly in HPC group (P < 0.05). The methylation levels of the Notch1 promoter 0.82 ± 0.03, 0.65 ± 0.03, and 0.60 ± 0.02 in the C, H, and HPC groups, respectively. The methylation levels of Notch1 decreased significantly (P < 0.05). The effect of HPC on HT22 cells exhibited similarities to that observed in the hippocampus. CONCLUSION HPC may confer neuroprotection by activating the Notch1 signaling pathway and regulating its methylation level, resulting in the regeneration of hippocampal neurons.
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Affiliation(s)
- Zhehan Chang
- Center for Translational Medicine, The Third People's Hospital of Longgang District, Shenzhen, China
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, China
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Qi Liu
- Department of Radiology, The Second Affiliated Hospital of Baotou Medical College, Baotou, China
| | - Peijia Fan
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Wenqiang Xu
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, China
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yabin Xie
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, China
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Kerui Gong
- Department of Oral and Maxillofacial Surgery, University of California San Francisco, San Francisco, USA
| | - Chunyang Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Baotou Medical College, Baotou, China
| | - Zhijun Zhao
- Department of Neurosurgery, The First Affiliated Hospital of Baotou Medical College, Baotou, China.
| | - Kai Sun
- Center for Translational Medicine, The Third People's Hospital of Longgang District, Shenzhen, China.
| | - Guo Shao
- Center for Translational Medicine, The Third People's Hospital of Longgang District, Shenzhen, China.
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, China.
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China.
- Department of Neurosurgery, The First Affiliated Hospital of Baotou Medical College, Baotou, China.
- Joint Laboratory of South China Hospital Affiliated to Shenzhen University and Third People's Hospital of Longgang District, Shenzhen University, Shenzhen, China.
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Zhang S, Fu W, Jia X, Bade R, Liu X, Xie Y, Xie W, Jiang S, Shao G. Hypoxic Preconditioning Modulates BDNF and Its Signaling through DNA Methylation to Promote Learning and Memory in Mice. ACS Chem Neurosci 2023. [PMID: 37289948 DOI: 10.1021/acschemneuro.3c00069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023] Open
Abstract
Hypoxic preconditioning (HPC) as an endogenous mechanism can resist hypoxia/ischemia injury and exhibit protective effects on neurological function including learning and memory. Although underlying molecular mechanisms remain unclear, HPC probably regulates the expression of protective molecules by modulating DNA methylation. Brain-derived neurotrophic factor (BDNF) activates its signaling upon binding to the tropomyosin-related kinase B (TrkB) receptor, which is involved in neuronal growth, differentiation, and synaptic plasticity. Therefore, this study focused on the mechanism by which HPC regulates BDNF and BDNF/TrkB signaling through DNA methylation to influence learning and memory. Initially, the HPC model was established by hypoxia stimulations on ICR mice. We found that HPC downregulated the expression of DNA methyltransferase (DNMT) 3A and DNMT3B. Then, the upregulation of BDNF expression in HPC mice was generated from a decrease in DNA methylation of the BDNF gene promoter detected by pyrophosphate sequencing. Subsequently, upregulation of BDNF activated BDNF/TrkB signaling and ultimately improved learning and spatial memory in HPC mice. Moreover, after mice were intracerebroventricularly injected with the DNMT inhibitor, the restraint of DNA methylation accompanied by an increase of BDNF and BDNF/TrkB signaling was also discovered. Finally, we observed that the inhibitor of BDNF/TrkB signaling prevented HPC from ameliorating learning and memory in mice. However, the DNMT inhibitor promoted spatial cognition in mice. Thus, we suggest that HPC may upregulate BDNF by inhibiting DNMTs and decreasing DNA methylation of the BDNF gene and then activate BDNF/TrkB signaling to improve learning and memory in mice. This may provide theoretical guidance for the clinical treatment of cognitive dysfunction caused by ischemia/hypoxia disease.
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Affiliation(s)
- Shiji Zhang
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou 014060, China
| | - Weng Fu
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou 014060, China
| | - Xiaoe Jia
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou 014060, China
- School of Basic Medicine and Forensic Sciences, Baotou Medical College, Baotou 014060, China
| | - Rengui Bade
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou 014060, China
- School of Medical Technology and Anesthesia, Baotou Medical College of Neuroscience Institute, Baotou Medical College, Baotou 014060, China
| | - Xiaolei Liu
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou 014060, China
| | - Yabin Xie
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou 014060, China
- School of Medical Technology and Anesthesia, Baotou Medical College of Neuroscience Institute, Baotou Medical College, Baotou 014060, China
| | - Wei Xie
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou 014060, China
- School of Medical Technology and Anesthesia, Baotou Medical College of Neuroscience Institute, Baotou Medical College, Baotou 014060, China
| | - Shuyuan Jiang
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou 014060, China
| | - Guo Shao
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou 014060, China
- Center for Translational Medicine and Department of Laboratory Medicine, The Third People's Hospital of Longgang District, Shenzhen 518112, China
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3
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He J, Zhao F, Chen B, Cui N, Li Z, Qin J, Luo L, Zhao C, Li L. Alterations in immune cell heterogeneities in the brain of aged zebrafish using single-cell resolution. Sci China Life Sci 2023:10.1007/s11427-021-2223-4. [PMID: 36607494 DOI: 10.1007/s11427-021-2223-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 08/25/2022] [Indexed: 01/07/2023]
Abstract
Immunocytes, including the microglia, are crucial in the neurodegenerative process in old people. However, the understanding of regarding microglia heterogeneity and other involved immunocytes remains elusive. We analyzed 26,456 immunocytes from 12-and 26-month-old zebrafish brains at single-cell resolution. Microglia and T lymphocytes were detected in the brain at both time points. Two types of microglia were annotated, namely, ac+ microglia and xr+ microglia, which were clustered into subsets 1, 2, 3, 4, 5, and subsets 6, 7, 8, 9, respectively. Diversified microglia predominated the adult brains and cooperated with T cells to perform the functions of immune response and neuronal nutrition. We validated the specific microglia markers. The novel transgenic lines, Tg(lgals3bpb:eGFP) and Tg(apoc1:eGFP), were created, which faithfully labeled ac+ microglia and served as valuable labeling tools. However, the microglia population reduced while T cells of six subtypes intriguingly increased to serve as the primary immune cells in aged brains. Unlike in 12-month-old brains, T cells, together with microglia, exhibited a coordinated signature of inflammation in the 26-month-old brains. Our findings revealed the immunocytes atlas in aged zebrafish brains. It implied the involvement of microglia and T cells in the progression of neurodegeneration in aging.
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Affiliation(s)
- Jiangyong He
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, China.,Research Center of Stem cells and Aging, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
| | - Fangying Zhao
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, China
| | - Bingyue Chen
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, China
| | - Nianfei Cui
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, China
| | - Zhifan Li
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, China
| | - Jie Qin
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, China
| | - Lingfei Luo
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, China
| | - Congjian Zhao
- Chongqing Engineering Research Center of Medical Electronics and Information Technology, School of Bioinformatics, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China.
| | - Li Li
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, China. .,Research Center of Stem cells and Aging, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China.
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Kim SS, Kim JL, Hwang KS, Park HC, Bae MA, Kim KT, Cho SH. Mechanism of action and neurotoxic effects of chronic exposure to bisphenol F in adult zebrafish. Sci Total Environ 2022; 851:158258. [PMID: 36030852 DOI: 10.1016/j.scitotenv.2022.158258] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/18/2022] [Accepted: 08/20/2022] [Indexed: 06/15/2023]
Abstract
Although bisphenol F (BPF), the main replacement for bisphenol A, has been commonly used in polycarbonate production, its neurotoxicity and the underlying mechanisms remain poorly understood. To address this knowledge gap, this study aimed to assess the neurotoxicity caused by chronic exposure to BPF and to identify its underlying mechanisms. We exposed adult zebrafish chronically to BPF at environmentally relevant concentrations (0.001, 0.01, and 0.1 mg/L) for 4 weeks. The results revealed that with BPF crossing the blood-brain barrier and bioaccumulating in brain tissues, chronic exposure to BPF resulted in anxiety-like behaviors and disruptions in learning and memory function in adult zebrafish. Furthermore, BPF toxicity in the zebrafish brain involved the dysregulation of metabolic pathways for choline and kynurenine in neurotransmitter systems and for 17β-estradiol, cortisol, pregnenolone-sulfate, and Dehydroepiandrosterone (DHEA)-sulfate in neurosteroid systems. RNA-seq analysis revealed that BPF exposure affected metabolic pathways, calcium signaling pathways, neuroactive ligand-receptor interactions, tight junctions, gap junctions, and the gonadotropin-releasing hormone signaling pathway. Our results indicate that chronic exposure to BPF alters the neurochemical profile of the brain and causes neurobehavioral effects, such as anxiety and cognitive decline. Overall, the multimodal approach, including behavioral and neurochemical profiling technologies, has great potential for the comprehensive assessment of potential risks posed by environmental pollutants to human and ecosystem health.
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Affiliation(s)
- Seong Soon Kim
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Jiwon L Kim
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
| | - Kyu-Seok Hwang
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Hae-Chul Park
- Department of Biomedical Sciences, Korea University, Ansan, Gyeonggido 425-707, Republic of Korea
| | - Myung Ae Bae
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea; Department of Medicinal Chemistry and Pharmacology, University of Science & Technology, Daejeon 34113, Republic of Korea.
| | - Ki-Tae Kim
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea.
| | - Sung-Hee Cho
- Chemical Analysis Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea.
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5
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Kim JL, Kim SS, Hwang KS, Park HC, Cho SH, Bae MA, Kim KT. Chronic exposure to butyl-paraben causes photosensitivity disruption and memory impairment in adult zebrafish. Aquat Toxicol 2022; 251:106279. [PMID: 36044784 DOI: 10.1016/j.aquatox.2022.106279] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 08/22/2022] [Accepted: 08/22/2022] [Indexed: 06/15/2023]
Abstract
Limited studies on neurotoxicity following chronic exposure to butyl‑paraben (BuP) have been conducted. In this study, neurobehavior in zebrafish adults was assessed using the novel tank test, photomotor response test, and T-maze test after exposure to BuP for 28 days at concentrations of 0, 0.01, 0.1, and 1.0 mg/L. To comprehensively understand the underlying molecular perturbations in the brain, alterations in transcripts, neurotransmitters, and neurosteroids were measured. We found that BuP penetrated the blood-brain barrier and impaired neurobehavior in photosensitivity at 1.0 mg/L and in memory at 0.1 and 1.0 mg/L. RNA-seq analysis showed that phototransduction, tight junctions, and neuroactive ligand receptor activity were significantly affected, which explains the observed abnormal neurobehaviors. Neurosteroid analysis revealed that BuP increased cortisol levels in a concentration-dependent manner and specifically reduced allopregnanolone levels at all tested concentrations, suggesting that cortisol and allopregnanolone are significant neurosteroid markers associated with photosensitivity and memory deficits. Collectively, we demonstrated that BuP can cross the blood-brain and modulate the levels of transcripts, associated with phototransduction and circadian rhythm, and neurosteroidal cortisol and allopregnanolone, resulting in abnormal neurobehavioral responses to light stimulation and learning and memory.
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Affiliation(s)
- Jiwon L Kim
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
| | - Seong Soon Kim
- Bio Platform Technology Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Kyu-Seok Hwang
- Bio Platform Technology Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Hae-Chul Park
- Department of Biomedical Sciences, Korea University, Ansan 15355, Republic of Korea
| | - Sung-Hee Cho
- Chemical Analysis Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Myung Ae Bae
- Bio Platform Technology Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Ki-Tae Kim
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea.
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6
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Marcon M, Benvenutti R, Gallas-Lopes M, Herrmann AP, Piato A. What do male and female zebrafish prefer? Directional and color preference in maze tasks. Eur J Neurosci 2022; 56:4546-4557. [PMID: 35831240 DOI: 10.1111/ejn.15771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 06/23/2022] [Accepted: 07/07/2022] [Indexed: 11/29/2022]
Abstract
Studies regarding the animals' innate preferences help elucidate and avoid probable sources of bias and serve as a reference to improve and develop new behavioral tasks. In zebrafish research, data obtained in behavioral assessments are often not replicated between research groups or even inside the same laboratory raising huge concerns about replicability and reproducibility. Among the potential causes that are not well considered, sexual differences can be a probable source of bias. Thus, this study aimed to investigate the male and female zebrafish directional and color preferences in the plus-maze and T-maze behavioral tasks. Experiment 1 evaluated directional preference and experiment 2 evaluated color preference in a plus-maze task; experiment 3 evaluated preference between black or white in a T-maze task. Individual preferences were expressed as the percentage of time spent in each zone. Our results showed that male and female zebrafish demonstrated no difference in directional preference in the plus-maze task. Surprisingly, male and female zebrafish showed color preference differences in the plus-maze task; males did not show any color preference, while female zebrafish demonstrated a red preference compared to white, blue, and yellow colors. Moreover, both male and female zebrafish demonstrated a strong black color preference compared to the white color in the T-maze task. Our findings characterized the spontaneous preference of male and female zebrafish for direction and color, identifying possible biases, and providing insights that contribute to the standardization of future protocols.
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Affiliation(s)
- Matheus Marcon
- Departamento de Bioquímica, Farmacologia e Fisiologia, Instituto de Ciências Biológicas e Naturais, Universidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brazil
| | - Radharani Benvenutti
- Programa de Pós-graduação em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Matheus Gallas-Lopes
- Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Ana Paula Herrmann
- Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.,Programa de Pós-graduação em Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Angelo Piato
- Programa de Pós-graduação em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.,Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.,Programa de Pós-graduação em Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
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Liu M, Liu Y, Wang H, Jia J, Liu K. Color Discrimination Provides Insight into the Relationship between Personality Cognition and Brain Morphology in the Western Mosquitofish (Gambusia affinis). Brain Behav Evol 2022; 97:274-283. [PMID: 35189620 DOI: 10.1159/000522483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 02/06/2022] [Indexed: 06/14/2023]
Abstract
Recent studies on the differences in cognitive ability between individuals focused on two aspects: one is whether the individual differences in cognitive ability are related to brain size, the other is whether they pertain to certain personality traits. To explore these two hypotheses, we tested the personality traits, cognitive abilities, and brain volumes of western mosquitofish (Gambusia affinis). First, a color preference test was conducted to select two unbiased colors for G. affinis for subsequent cognitive tests. The results showed that G. affinis had a great preference for red and green to yellow and blue; therefore, the red-green combination was selected for the study of cognitive abilities. Then, we explored the relationship among cognition, personality, and brain morphology through cognitive abilities tests, personality traits, and brain volume measurements. We found that there was a trade-off among cognition, personality, and brain morphology. For example, more active individuals found food faster, but had also poor memory; Those individuals with larger corpus cerebelli were bolder while they were less likely to find food; The individuals that found food faster were more active and had a smaller inferior lobe. The color preference test provides a reliable way for selecting unbiased colors for behavioral studies in G. affinis. Meanwhile, our study indicates that there exists a balance mechanism among cognition, personality, and brain morphology.
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Affiliation(s)
- Mengyu Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, China,
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China,
| | - Yanqiu Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - He Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Jia Jia
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Kai Liu
- Fujian Provincial Key Laboratory of Marine Fishery Resources and Eco-Environment, Fisheries College, Jimei University, Xiamen, China
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8
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Meng-Ru Z, Ruo-Xuan S, Ming-Yang Y, Tong T, Lei Z, Ying-Bo Y, Bao-Guo X. Antagonizing astrocytic platelet activating factor receptor-neuroinflammation for total flavone of epimedium in response to cuprizone demyelination. Int Immunopharmacol 2021; 101:108181. [PMID: 34607229 DOI: 10.1016/j.intimp.2021.108181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/07/2021] [Accepted: 09/18/2021] [Indexed: 01/01/2023]
Abstract
Demyelinating diseases of the central nervous system are characterized by recurrent demyelination and progressive neurodegeneration, but there are no clinical drugs targeting myelin regeneration or improving functional disability in the treatment of multiple sclerosis. Total flavone of Epimedium (TFE) is the main active components of Epimedium, which exhibits the beneficial biological activities in the treatment of diseases, but there is no report in the treatment of demyelinating disorder. The purpose of this study was to explore the therapeutic potential and possible mechanism of TFE in the treatment of demyelination. The results showed that TFE efficiently improved the behavioural performance and histological demyelination in cuprizone (CPZ)-induced demyelinating model. In terms of action, TFE increased astrocytes enrichment in corpus callosum, striatum and cortex, and promoted astrocytes to express neurotrophic factors. Furthermore, the expression of platelet-activating factor receptor (PAFR) in astrocytes was induced by CPZ feeding and LPS stimulation, accompanied by the increase of inflammatory cytokines TNF-α,IL-6 and IL-1β. TFE declined the expression of PAFR, and inhibited inflammatory response. At the same time, TFE also antagonized PAFR activation and inflammatory response triggered by PAF, which further confirmed that TFE, as a new PAFR antagonist, inhibited the astrocyte-derived inflammatory response by antagonizing PAFR-neuroinflammation axis, thus contributing to myelin protection and regeneration.
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Affiliation(s)
- Zhao Meng-Ru
- Shanghai Innovation Center of TCM Health Service, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Sui Ruo-Xuan
- Academy of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Yu Ming-Yang
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Tian Tong
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Zhang Lei
- Shanghai Innovation Center of TCM Health Service, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Yang Ying-Bo
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Xiao Bao-Guo
- Department of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai 200040, China.
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9
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Chavda V, Patel S, Alghamdi BS, Ashraf GM. Endothelin-1 induced global ischaemia in adult zebrafish: A model with novel entity of stroke research. J Chem Neuroanat 2021; 118:102025. [PMID: 34520802 DOI: 10.1016/j.jchemneu.2021.102025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 09/04/2021] [Accepted: 09/04/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Stroke is a leading cause of death in the general population, and it occurs three times more frequently in diabetic patients, necessitating extensive research into new therapeutics. The reproducibility, similarity, and technical limitations of current animal models are limited. METHODS We developed a stroke induction model using pink zebra-Danio-rerio. Diabetes was induced in zebrafish by giving them D-glucose (111 mM) for 14 days, and those with blood glucose levels higher than 100 mg/dl were included in the study. In Zebrafish, an experimental stroke was induced by a single oral administration of Endothelin-1 (ET-1, 3µl/gm). Swimming, behavioural patterns, and cognitive performance were all recorded and analysed using UMA Tracker. The brains were removed for histopathological analysis. RESULTS In both the normal and diabetic groups, ET-1 administration resulted in a statistically significant change in swimming pattern and movements. Furthermore, changes in swimming pattern and recovery time were statistically significant in the diabetic ET-1 treatment group. In the neurocognitive assessment paradigm, the behavioural study of ET-1 treated groups revealed a disturbed cognitive profile and locomotor coordination, with an increase in the number of errors and a decrease in total distance travelled. Histopathological analysis of ET-1 treated groups revealed cortical lesions, shrunken neuronal cells, and thrombocytes in spheroid form with disturbed normal architecture of brain tissue when compared to normal control groups in tectum opticum and telencephalon. In terms of stability, reproducibility, and genetic similarity to human stroke, the current experimental model outperforms other available rodent stroke models. CONCLUSION The ET-1 induced experimental zebrafish stroke model opens up new avenues for diabetes-related stroke research due to its novelty, reproducibility, and ability to overcome technical errors found in other recent models.
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Affiliation(s)
- Vishal Chavda
- Department of Pharmacology, Nirma University, Ahmadabad, Gujarat, India
| | - Snehal Patel
- Department of Pharmacology, Nirma University, Ahmadabad, Gujarat, India.
| | - Badrah S Alghamdi
- Department of Physiology, Neuroscience Unit, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia; Pre-Clinical Research Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ghulam Md Ashraf
- Pre-Clinical Research Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
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Benvenutti R, Marcon M, Gallas-Lopes M, de Mello AJ, Herrmann AP, Piato A. Swimming in the maze: An overview of maze apparatuses and protocols to assess zebrafish behavior. Neurosci Biobehav Rev 2021; 127:761-778. [PMID: 34087275 DOI: 10.1016/j.neubiorev.2021.05.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 04/12/2021] [Accepted: 05/26/2021] [Indexed: 12/09/2022]
Abstract
Most preclinical behavioral assays use rodents as model animals, leaving room for species-specific biases that could be avoided by an expanded cross-species approach. In this context, zebrafish emerges as an alternative model organism to study neurobiological mechanisms of anxiety, preference, learning, and memory, as well as other phenotypes with relevance to neuropsychiatric disorders. In recent years, several zebrafish studies using different types of mazes have been published. However, the protocols and apparatuses' shapes and dimensions vary widely in the literature. This variation may puzzle researchers attempting to implement maze behavioral assays and challenges the reproducibility across institutions. This review aims to provide an overview of the behavioral paradigms assessed in different types of mazes in zebrafish reported in the last couple of decades. Also, this review aims to contribute to a better characterization of multi-behavioral assessment in zebrafish.
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Affiliation(s)
- Radharani Benvenutti
- Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil; Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/209, Porto Alegre, RS, 90050-170, Brazil
| | - Matheus Marcon
- Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil; Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/209, Porto Alegre, RS, 90050-170, Brazil
| | - Matheus Gallas-Lopes
- Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil
| | - Anna Julie de Mello
- Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil
| | - Ana Paula Herrmann
- Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil; Programa de Pós-Graduação em Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil
| | - Angelo Piato
- Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil; Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/209, Porto Alegre, RS, 90050-170, Brazil; Programa de Pós-Graduação em Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil.
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Chen W, Xie L, Yu F, Li Y, Chen C, Xie W, Huang T, Zhang Y, Zhang S, Li P. Zebrafish as a Model for In-Depth Mechanistic Study for Stroke. Transl Stroke Res 2021; 12:695-710. [PMID: 34050491 DOI: 10.1007/s12975-021-00907-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/05/2021] [Accepted: 03/08/2021] [Indexed: 12/22/2022]
Abstract
Stroke is one of the world's leading causes of death and disability, posing enormous burden to the society. However, the pathogenesis and mechanisms that underlie brain injury and brain repair remain largely unknown. There's an unmet need of in-depth mechanistic research in this field. Zebrafish (Danio rerio) is a powerful tool in brain science research mainly due to its small size and transparent body, high genome synteny with human, and similar nervous system structures. It can be used to establish both hemorrhagic and ischemic stroke models easily and effectively through different ways. After the establishment of stroke model, research methods including behavioral test, in vivo imaging, and drug screening are available to explore mechanisms that underlie the brain injury and brain repair after stroke. This review focuses on the advantages and the feasibility of zebrafish stroke model, and will also introduce the key methods available for stroke studies in zebrafish, which may drive future mechanistic studies in the pursuit of discovering novel therapeutic targets for stroke patients.
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Affiliation(s)
- Weijie Chen
- Department of Anesthesiology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine Shanghai Jiaotong University, 160 Pujian Rd, Shanghai, 200127, China
| | - Lv Xie
- Department of Anesthesiology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine Shanghai Jiaotong University, 160 Pujian Rd, Shanghai, 200127, China
| | - Fang Yu
- Department of Anesthesiology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine Shanghai Jiaotong University, 160 Pujian Rd, Shanghai, 200127, China
| | - Yan Li
- Department of Anesthesiology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine Shanghai Jiaotong University, 160 Pujian Rd, Shanghai, 200127, China
| | - Chen Chen
- Department of Anesthesiology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine Shanghai Jiaotong University, 160 Pujian Rd, Shanghai, 200127, China
| | - Wanqing Xie
- Department of Anesthesiology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine Shanghai Jiaotong University, 160 Pujian Rd, Shanghai, 200127, China
| | - Tingting Huang
- Department of Anesthesiology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine Shanghai Jiaotong University, 160 Pujian Rd, Shanghai, 200127, China
| | - Yueman Zhang
- Department of Anesthesiology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine Shanghai Jiaotong University, 160 Pujian Rd, Shanghai, 200127, China
| | - Song Zhang
- Department of Anesthesiology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine Shanghai Jiaotong University, 160 Pujian Rd, Shanghai, 200127, China.
| | - Peiying Li
- Department of Anesthesiology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine Shanghai Jiaotong University, 160 Pujian Rd, Shanghai, 200127, China.
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Zakharova EI, Storozheva ZI, Proshin AT, Monakov MY, Dudchenko AM. Opposite Pathways of Cholinergic Mechanisms of Hypoxic Preconditioning in the Hippocampus: Participation of Nicotinic α7 Receptors and Their Association with the Baseline Level of Startle Prepulse Inhibition. Brain Sci 2020; 11:brainsci11010012. [PMID: 33374246 PMCID: PMC7824639 DOI: 10.3390/brainsci11010012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/15/2020] [Accepted: 12/21/2020] [Indexed: 12/14/2022] Open
Abstract
(1) Background. A one-time moderate hypobaric hypoxia (HBH) has a preconditioning effect whose neuronal mechanisms are not studied well. Previously, we found a stable correlation between the HBH efficiency and acoustic startle prepulse inhibition (PPI). This makes it possible to predict the individual efficiency of HBH in animals and to study its potential adaptive mechanisms. We revealed a bi-directional action of nicotinic α7 receptor agonist PNU-282987 and its solvent dimethyl sulfoxide on HBH efficiency with the level of PPI > or < 40%. (2) The aim of the present study was to estimate cholinergic mechanisms of HBH effects in different brain regions. (3) Methods: in rats pretested for PPI, we evaluated the activity of synaptic membrane-bound and water-soluble choline acetyltransferase (ChAT) in the sub-fractions of ‘light’ and ‘heavy’ synaptosomes of the neocortex, hippocampus and caudal brainstem in the intact brain and after HBH. We tested the dose-dependent influence of PNU-282987 on the HBH efficiency. (4) Results: PPI level and ChAT activity correlated negatively in all brain structures of the intact animals, so that the values of the latter were higher in rats with PPI < 40% compared to those with PPI > 40%. After HBH, this ChAT activity difference was leveled in the neocortex and caudal brainstem, while for membrane-bound ChAT in the ‘light’ synaptosomal fraction of hippocampus, it was reversed to the opposite. In addition, a pharmacological study revealed that PNU-282987 in all used doses and its solvent displayed corresponding opposite effects on HBH efficiency in rats with different levels of PPI. (5) Conclusion: We substantiate that in rats with low and high PPI two opposite hippocampal cholinergic mechanisms are involved in hypoxic preconditioning, and both are implemented by forebrain projections via nicotinic α7 receptors. Possible causes of association between general protective adaptation, HBH, PPI, forebrain cholinergic system and hippocampus are discussed.
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Affiliation(s)
- Elena I. Zakharova
- Laboratory of General Pathology of Cardiorespiratory System, Institute of General Pathology and Pathophysiology, Baltiyskaya, 8, 125315 Moscow, Russia; (M.Y.M.); (A.M.D.)
- Correspondence: ; Tel.: +7-9199668657; Fax: +7-4991511756
| | - Zinaida I. Storozheva
- Laboratory of Clinical Neurophysiology, Serbsky’ National Medical Research Center for Psychiatry and Narcology, Kropotkinsky per., 23, 111395 Moscow, Russia;
| | - Andrey T. Proshin
- Laboratory of Functional Neurochemistry, P.K. Anokhin Institute of Normal Physiology, Baltiyskaya, 8, 125315 Moscow, Russia;
| | - Mikhail Yu. Monakov
- Laboratory of General Pathology of Cardiorespiratory System, Institute of General Pathology and Pathophysiology, Baltiyskaya, 8, 125315 Moscow, Russia; (M.Y.M.); (A.M.D.)
| | - Alexander M. Dudchenko
- Laboratory of General Pathology of Cardiorespiratory System, Institute of General Pathology and Pathophysiology, Baltiyskaya, 8, 125315 Moscow, Russia; (M.Y.M.); (A.M.D.)
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Ramezani M, Komaki A, Hashemi-Firouzi N, Mortezaee K, Faraji N, Golipoor Z. Therapeutic effects of melatonin-treated bone marrow mesenchymal stem cells (BMSC) in a rat model of Alzheimer's disease. J Chem Neuroanat 2020; 108:101804. [DOI: 10.1016/j.jchemneu.2020.101804] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 05/02/2020] [Accepted: 05/24/2020] [Indexed: 12/15/2022]
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Das T, Soren K, Yerasi M, Kamle A, Kumar A, Chakravarty S. Molecular Basis of Sex Difference in Neuroprotection induced by Hypoxia Preconditioning in Zebrafish. Mol Neurobiol 2020; 57:5177-5192. [PMID: 32862360 DOI: 10.1007/s12035-020-02091-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 08/24/2020] [Indexed: 02/08/2023]
Abstract
Hypoxia, the major cause of ischemic injury, leads to debilitating disease in infants via birth asphyxia and cerebral palsy, whereas in adults via heart attack and stroke. A widespread, natural protective phenomenon termed 'hypoxic preconditioning' (PH) occurs when prior exposures to hypoxia eventually result in robust hypoxia resistance. Accordingly, we have developed and optimized a novel model of hypoxic preconditioning in adult zebrafish to mimic the tolerance of mini stroke(s) in human, which appears to protect against the severe damage inflicted by a major stroke event. Here, we observed a remarkable difference in the progression pattern of neuroprotection between preconditioning hypoxia followed by acute hypoxia (PH) group, and acute hypoxia (AH) only group, with noticeable sex difference when compared with normoxia behaviour upon recovery. Since gender difference has been reported in stroke risk factors and disease history, it was pertinent to investigate whether any such sex difference also exists in PH's protective mechanism against acute ischemic stroke. In order to elucidate the neural molecular mechanisms behind sex difference in neuroprotection induced by PH, a high throughput proteomics approach utilizing iTRAQ was performed, followed by protein enrichment analysis using ingenuity pathway analysis (IPA) tool. Out of thousands of significantly altered proteins in zebrafish brain, the ones having critical role either in neuroglial proliferation/differentiation or neurotrophic functions were validated by analyzing their expression levels in preconditioned (PH), acute hypoxia (AH), and normoxia groups. The data indicate that female zebrafish brains are more protected against the severity of AH when exposed to the hypoxic preconditioning. The study also sheds light on the involvement of many signalling pathways underlying sex difference in preconditioning-induced neuroprotective mechanism, which can be further validated for the therapeutic approach.
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Affiliation(s)
- Tapatee Das
- Applied Biology, CSIR-Indian Institute of Chemical Technology (IICT), Hyderabad, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, U.P., 201002, India
| | - Kalyani Soren
- Applied Biology, CSIR-Indian Institute of Chemical Technology (IICT), Hyderabad, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, U.P., 201002, India
| | - Mounica Yerasi
- Applied Biology, CSIR-Indian Institute of Chemical Technology (IICT), Hyderabad, India
| | - Avijeet Kamle
- CSIR-Centre for Cellular and Molecular Biology (CCMB), Hyderabad, India
| | - Arvind Kumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, U.P., 201002, India.,CSIR-Centre for Cellular and Molecular Biology (CCMB), Hyderabad, India
| | - Sumana Chakravarty
- Applied Biology, CSIR-Indian Institute of Chemical Technology (IICT), Hyderabad, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, U.P., 201002, India.
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Lin Y, Chen T, Mao G, Qiu T, Lan Y, Xiang X, Huang J, Huang J, Lu T, Gan S, Sun XD, Zhang J. Long-term and in vivo assessment of Aβ protein-induced brain atrophy in a zebrafish model by optical coherence tomography. J Biophotonics 2020; 13:e202000067. [PMID: 32306519 DOI: 10.1002/jbio.202000067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 04/01/2020] [Accepted: 04/12/2020] [Indexed: 05/20/2023]
Abstract
In this study, a neurotoxicity model of zebrafish induced by amyloid beta (Aβ) protein was developed and evaluated in vivo by optical coherence tomography (OCT). Aβ protein and phosphate buffer saline (PBS) were separately injected into the head of two groups of adult zebrafish (n = 6 per group). Congo-red staining results confirmed that Aβ protein had penetrated into brain tissue. All zebrafish were imaged with OCT on the 0th, 5th, 10th, 15th and 20th day postinjection. OCT images showed that PBS is not toxic to brain tissue. However, significant brain atrophy could be seen in the OCT images of zebrafish injected with Aβ-protein that was verified by histological consequences. In addition, zebrafish in the model group showed memory decline in behavioral tests. This study verified the feasibility of in vivo long-term assessment of Aβ protein-induced brain atrophy in adult zebrafish by OCT that has great potential to be applied in the neurological diseases research.
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Affiliation(s)
- Yanping Lin
- School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Tingru Chen
- School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Guangjuan Mao
- School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Ting Qiu
- School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Yintao Lan
- School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Xiang Xiang
- School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jie Huang
- The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jing Huang
- School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Ting Lu
- School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Shuqi Gan
- School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Xiang-Dong Sun
- School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong, China
- The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jian Zhang
- School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong, China
- Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China
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Kim YS, Won YJ, Lim BG, Min TJ, Kim YH, Lee IO. Neuroprotective effects of magnesium L-threonate in a hypoxic zebrafish model. BMC Neurosci 2020; 21:29. [PMID: 32590943 PMCID: PMC7318545 DOI: 10.1186/s12868-020-00580-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 06/21/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Hypoxia inhibits the uptake of glutamate (a major neurotransmitter in the brain closely related to cognitive function) into brain cells, and the initial response of cells to cortical hypoxia depends on glutamate. Previous studies have suggested that magnesium may have protective effects against hypoxic injuries. In particular, magnesium L-threonate (MgT) may increase magnesium ion concentrations in the brain better than MgSO4 and improve cognitive function. METHODS We evaluated cell viability under hypoxic conditions in the MgT- and MgSO4-treated human SH-SY5Y neurons, in vivo behavior using the T-maze test following hypoxia in MgT-treated zebrafish, activity of brain mitochondrial dehydrogenase by 2,3,5-triphenyltetrazolium chloride (TTC) staining, and protein expression of the excitatory amino acid transporter (EAAT) 4 glutamate transporter by western blotting. RESULTS Among the groups treated with hypoxia, cell viability significantly increased when pre-treated with 1 or 10 mM MgT (p = 0.009 and 0.026, respectively). Despite hypoxic insult, MgT-treated zebrafish showed preferences for the red compartment (p = 0.025 for distance and p = 0.007 for frequency of entries), suggesting memory preservation. TTC staining showed reduced cerebral infarction and preserved absorbance in the MgT-treated zebrafish brain after hypoxia (p = 0.010 compared to the hypoxia group). In addition, western blot showed upregulation of EAAT4 protein in the MgT treated group. CONCLUSIONS Pre-treatment with MgT attenuated cell death and cerebral infarction due to hypoxia and protected cognitive function in zebrafish. In addition, MgT appeared to modulate expression of the glutamate transporter, EAAT4.
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Affiliation(s)
- Young-Sung Kim
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Seoul, Korea
| | - Young Ju Won
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Seoul, Korea
| | - Byung Gun Lim
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Seoul, Korea
| | - Too Jae Min
- Department of Anesthesiology and Pain Medicine, Korea University Ansan Hospital, Ansan, Korea
| | - Yeon-Hwa Kim
- Institute of Medical Science, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea
| | - Il Ok Lee
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Seoul, Korea.
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He Y, An J, Yin JJ, Sui RX, Miao Q, Ding ZB, Han QX, Wang Q, Ma CG, Xiao BG. Ethyl pyruvate enhances spontaneous remyelination by targeting microglia phagocytosis. Int Immunopharmacol 2019; 77:105929. [DOI: 10.1016/j.intimp.2019.105929] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 09/03/2019] [Accepted: 09/21/2019] [Indexed: 01/09/2023]
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