1
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Ameliorative effects of oyster (Crassostrea hongkongensis) protein hydrolysate on age-induced cognitive impairment via restoring glia cell dysfunction and neuronal injured in zebrafish. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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2
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Wei Y, Liu Y, He Y, Wang Y. Mitochondria and lysosome-targetable fluorescent probes for hydrogen peroxide. J Mater Chem B 2021; 9:908-920. [PMID: 33346307 DOI: 10.1039/d0tb02440f] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Hydrogen peroxide (H2O2), as a key member of the reactive oxygen species (ROS), has a certain regulatory effect on many physiological processes, such as cell proliferation, differentiation and migration. However, abnormal production of H2O2 can cause diseases including cancer, Alzheimer's disease, cardiovascular disease, and so on. Therefore, it is important to detect changes in H2O2 at the subcellular level. In recent years, many fluorescent probes for H2O2 have been developed and used in living cells. In this review, we introduce some typical fluorescent probes for H2O2 with mitochondrial and lysosomal targeting. This review contains targeting strategies, detection mechanisms, optical characteristics and cell imaging of these probes.
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Affiliation(s)
- Yongchun Wei
- Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250000, Shandong, China.
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3
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Hou P, Chen S, Liang G, Li H, Zhang H. Design of a facile fluorescent probe with a large Stokes shift for hydrogen peroxide imaging in vitro and in vivo. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 236:118338. [PMID: 32299038 DOI: 10.1016/j.saa.2020.118338] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/31/2020] [Accepted: 04/02/2020] [Indexed: 06/11/2023]
Abstract
By modifying 4'‑hydroxybiphenyl‑4‑carbonitrile (BPN-OH) with 2‑(4‑(bromo‑methyl)phenyl)‑4,4,5,5‑tetramethyl‑1,3,2‑dioxaborolane group, a facile fluorescent probe, BPN-TOB, for sensitively tracing H2O2 was designed and synthesized. BPN-TOB displayed a low detection limit (67 nM), fast response time (10 min), low cytotoxicity, a mega Stokes shift (170 nm) and a remarkable fluorescence enhancement (72-fold) in the detection of H2O2. Additionally, probe BPN-TOB could monitor exogenous and endogenous H2O2 in living MGC-803 cells (human gastric cancer cells) and RAW264.7 cells (leukemia cellsin mouse macrophage). In particular, this probe BPN-TOB was successfully utilized for imaging H2O2 in zebrafish.
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Affiliation(s)
- Peng Hou
- College of Pharmacy, Qiqihar Medical University, Qiqihar, Heilongjiang 161006, PR China.
| | - Song Chen
- College of Pharmacy, Qiqihar Medical University, Qiqihar, Heilongjiang 161006, PR China
| | - Guilin Liang
- Department of Pharmacy, Qiqihar First Hospital, Qiqihar, Heilongjiang 161005, PR China
| | - Hongmei Li
- College of Pharmacy, Qiqihar Medical University, Qiqihar, Heilongjiang 161006, PR China
| | - Hongguang Zhang
- College of Pharmacy, Qiqihar Medical University, Qiqihar, Heilongjiang 161006, PR China
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4
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Abstract
The laboratory zebrafish (Danio rerio) is now an accepted model in toxicologic research. The zebrafish model fills a niche between in vitro models and mammalian biomedical models. The developmental characteristics of the small fish are strategically being used by scientists to study topics ranging from high-throughput toxicity screens to toxicity in multi- and transgenerational studies. High-throughput technology has increased the utility of zebrafish embryonic toxicity assays in screening of chemicals and drugs for toxicity or effect. Additionally, advances in behavioral characterization and experimental methodology allow for observation of recognizable phenotypic changes after xenobiotic exposure. Future directions in zebrafish research are predicted to take advantage of CRISPR-Cas9 genome editing methods in creating models of disease and interrogating mechanisms of action with fluorescent reporters or tagged proteins. Zebrafish can also model developmental origins of health and disease and multi- and transgenerational toxicity. The zebrafish has many advantages as a toxicologic model and new methodologies and areas of study continue to expand the usefulness and application of the zebrafish.
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Affiliation(s)
| | - Jennifer L Freeman
- School of Health Sciences, Purdue University, West Lafayette, Indiana 47907
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5
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Zhou L, Ding H, Zhao W, Hu S. A mitochondria targetable two-photon excited near-infrared fluorescent probe for imaging of H 2O 2 in live cells and tissues. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 206:529-534. [PMID: 30176429 DOI: 10.1016/j.saa.2018.08.042] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 08/21/2018] [Accepted: 08/24/2018] [Indexed: 06/08/2023]
Abstract
Hydrogen peroxide (H2O2), a member of small-molecule reactive oxygen species (ROS), plays an important role in physiological and/or pathological process within live systems. Herein, to quantitatively investigate the biological role of H2O2 in subcellular level, we constructed of a novel two-photon (TP) in near-infrared (NIR) out fluorescent probe (TP-NIR-H2O2) for visualization of mitochondria H2O2 in living cells and tissues. Specifically, TP-NIR-H2O2 utilized the oxonium ion as the mitochondrial targeting unit and phenylboric acid as the H2O2 reaction moiety. After the phenylboric acid moiety reaction with H2O2, TP-NIR-H2O2 displayed a ~105-fold fluorescence intensity enhancement in 665 nm. Selectivity experiment demonstrated that the probe can detect H2O2 with high selectivity over other ROS. Moreover, TP-NIR-H2O2 could be employed for imaging H2O2 in mice liver tissues with large tissue-image depth (50-170 μm) under two-photon excitation (800 nm).
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Affiliation(s)
- Liyi Zhou
- College of Food Science and Technology, Central South University of Forestry and Technology, Changsha 410004, PR China; College of Life Sciences and Chemistry, Hunan University of Technology, Hunan 412007, PR China; Hunan Key Laboratory of Processed Food for Special Medical Purpose, Hunan 410004, PR China; State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China.
| | - Haiyuan Ding
- College of Food Science and Technology, Central South University of Forestry and Technology, Changsha 410004, PR China
| | - Wen Zhao
- College of Food Science and Technology, Central South University of Forestry and Technology, Changsha 410004, PR China
| | - Shunqin Hu
- College of Life Sciences and Chemistry, Hunan University of Technology, Hunan 412007, PR China
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6
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Khan AH, Zou Z, Xiang Y, Chen S, Tian XL. Conserved signaling pathways genetically associated with longevity across the species. Biochim Biophys Acta Mol Basis Dis 2018; 1865:1745-1755. [PMID: 31109448 DOI: 10.1016/j.bbadis.2018.09.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 07/26/2018] [Accepted: 09/04/2018] [Indexed: 02/08/2023]
Abstract
Advanced age is an independent risk factor for natural death and common diseases, such as cardiovascular diseases, dementia, and cancers, which are life-threatening and cause disabilities. On the other hand, individual with healthy longevity is a plausible model for successful aging. Thus, search for longevity-associated genes and pathways likely provides a unique approach to understand the genetic mechanisms underlying aging and healthspan, and emerging evidence from model organisms has highlighted the significance of genetic components in longevity. Here we reviewed the uses of model organisms including yeast, ciliate, nematode, arthropod, fish, rodent, and primate as well as human to identify the genetic determinants of longevity and discussed the genetic contributions of conserved longevity pathways, such as adrenergic system, AMPK, insulin/IGF-1, and mTOR signaling pathways.
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Affiliation(s)
- Abdul Haseeb Khan
- Human population genetics, Human Aging Research Institute (HARI), Nanchang University, Xuefu Rd 999, Honggutan New District, Nanchang, Jiangxi Province 330031, China; School of Life Science, Nanchang University, Xuefu Rd 999, Honggutan New District, Nanchang, Jiangxi Province 330031, China
| | - Zhiwen Zou
- School of Life Science, Nanchang University, Xuefu Rd 999, Honggutan New District, Nanchang, Jiangxi Province 330031, China
| | - Yang Xiang
- Human population genetics, Human Aging Research Institute (HARI), Nanchang University, Xuefu Rd 999, Honggutan New District, Nanchang, Jiangxi Province 330031, China; School of Life Science, Nanchang University, Xuefu Rd 999, Honggutan New District, Nanchang, Jiangxi Province 330031, China
| | - Shenghan Chen
- Human population genetics, Human Aging Research Institute (HARI), Nanchang University, Xuefu Rd 999, Honggutan New District, Nanchang, Jiangxi Province 330031, China; School of Life Science, Nanchang University, Xuefu Rd 999, Honggutan New District, Nanchang, Jiangxi Province 330031, China
| | - Xiao-Li Tian
- Human population genetics, Human Aging Research Institute (HARI), Nanchang University, Xuefu Rd 999, Honggutan New District, Nanchang, Jiangxi Province 330031, China; School of Life Science, Nanchang University, Xuefu Rd 999, Honggutan New District, Nanchang, Jiangxi Province 330031, China.
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7
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Tonoyama Y, Shinya M, Toyoda A, Kitano T, Oga A, Nishimaki T, Katsumura T, Oota H, Wan MT, Yip BWP, Helen MOL, Chisada S, Deguchi T, Au DWT, Naruse K, Kamei Y, Taniguchi Y. Abnormal nuclear morphology is independent of longevity in a zmpste24-deficient fish model of Hutchinson-Gilford progeria syndrome (HGPS). Comp Biochem Physiol C Toxicol Pharmacol 2018; 209:54-62. [PMID: 29567411 DOI: 10.1016/j.cbpc.2018.03.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 03/11/2018] [Accepted: 03/16/2018] [Indexed: 12/21/2022]
Abstract
Lamin is an intermediate protein underlying the nuclear envelope and it plays a key role in maintaining the integrity of the nucleus. A defect in the processing of its precursor by a metalloprotease, ZMPSTE24, results in the accumulation of farnesylated prelamin in the nucleus and causes various diseases, including Hutchinson-Gilford progeria syndrome (HGPS). However, the role of lamin processing is unclear in fish species. Here, we generated zmpste24-deficient medaka and evaluated their phenotype. Unlike humans and mice, homozygous mutants did not show growth defects or lifespan shortening, despite lamin precursor accumulation. Gonadosomatic indices, blood glucose levels, and regenerative capacity of fins were similar in 1-year-old mutants and their wild-type (WT) siblings. Histological examination showed that the muscles, subcutaneous fat tissues, and gonads were normal in the mutants at the age of 1 year. However, the mutants showed hypersensitivity to X-ray irradiation, although p53target genes, p21 and mdm2, were induced 6 h after irradiation. Immunostaining of primary cultured cells from caudal fins and visualization of nuclei using H2B-GFP fusion proteins revealed an abnormal nuclear shape in the mutants both in vitro and in vivo. The telomere lengths were significantly shorter in the mutants compared to WT. Taken together, these results suggest that zmpste24-deficient medaka phenocopied HGPS only partially and that abnormal nuclear morphology and lifespan shortening are two independent events in vertebrates.
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Affiliation(s)
- Yasuhiro Tonoyama
- Branch Laboratory of Gene Medicine, School of Medicine, Keio University, 2 Okubo, Tsukuba, Ibaraki 300-2611, Japan
| | - Minori Shinya
- Department of Biology, Keio University, 4-1-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8521, Japan
| | - Atsushi Toyoda
- Center for Information Biology, National Institute of Genetics, Yata 1111, Mishima, Shizuoka 411-8540, Japan
| | - Takeshi Kitano
- Department of Biological Sciences, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Atsunori Oga
- Department of Pathology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
| | - Toshiyuki Nishimaki
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0674, Japan
| | - Takafumi Katsumura
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0674, Japan
| | - Hiroki Oota
- Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0674, Japan
| | - Miles T Wan
- State Key Laboratory in Marine Pollution, Department of Chemistry, City University of, Hong Kong, China
| | - Bill W P Yip
- State Key Laboratory in Marine Pollution, Department of Chemistry, City University of, Hong Kong, China
| | - Mok O L Helen
- State Key Laboratory in Marine Pollution, Department of Chemistry, City University of, Hong Kong, China
| | - Shinichi Chisada
- Department of Preventive Medicine and Public Health, Kyorin University, School of Medicine, Tokyo 181-8611, Japan
| | - Tomonori Deguchi
- Advanced Genome Design Research Group, Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Midorigaoka 1-8-31, Ikeda, Osaka, 563-8577, Japan
| | - Doris W T Au
- State Key Laboratory in Marine Pollution, Department of Chemistry, City University of, Hong Kong, China
| | - Kiyoshi Naruse
- Laboratory of Bioresources, National Institute for Basic Biology, National Institutes of Natural Sciences, Okazaki, Aichi 444-8585, Japan
| | - Yasuhiro Kamei
- Spectrography and Bioimaging Facility, National Institute for Basic Biology, National Institutes of Natural Sciences, Okazaki, Aichi 444-8585, Japan
| | - Yoshihito Taniguchi
- Department of Preventive Medicine and Public Health, Kyorin University, School of Medicine, Tokyo 181-8611, Japan.
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8
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Mason T, Snell K, Mittge E, Melancon E, Montgomery R, McFadden M, Camoriano J, Kent ML, Whipps CM, Peirce J. Strategies to Mitigate a Mycobacterium marinum Outbreak in a Zebrafish Research Facility. Zebrafish 2017; 13 Suppl 1:S77-87. [PMID: 27351618 PMCID: PMC4931754 DOI: 10.1089/zeb.2015.1218] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
In 2011, the zebrafish research facility at the University of Oregon experienced an outbreak of Mycobacterium marinum that affected both research fish and facility staff. A thorough review of risks to personnel, the zebrafish veterinary care program, and zebrafish husbandry procedures at the research facility followed. In the years since 2011, changes have been implemented throughout the research facility to protect the personnel, the fish colony, and ultimately the continued success of the zebrafish model research program. In this study, we present the history of the outbreak, the changes we implemented, and recommendations to mitigate pathogen outbreaks in zebrafish research facilities.
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Affiliation(s)
- Timothy Mason
- 1 Aquatic Animal Care Services, University of Oregon , Eugene, Oregon
| | - Kathy Snell
- 1 Aquatic Animal Care Services, University of Oregon , Eugene, Oregon
| | - Erika Mittge
- 2 Institute of Molecular Biology, University of Oregon , Eugene, Oregon
| | - Ellie Melancon
- 3 Institute of Neuroscience, University of Oregon , Eugene, Oregon
| | | | - Marcie McFadden
- 1 Aquatic Animal Care Services, University of Oregon , Eugene, Oregon
| | - Javier Camoriano
- 1 Aquatic Animal Care Services, University of Oregon , Eugene, Oregon
| | - Michael L Kent
- 4 Department of Microbiology and Biomedical Sciences, Oregon State University , Corvallis, Oregon
| | - Christopher M Whipps
- 5 SUNY-ESF, State University of New York College of Environmental Science and Forestry , Syracuse, New York
| | - Judy Peirce
- 3 Institute of Neuroscience, University of Oregon , Eugene, Oregon
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9
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Zhou L, Peng Y, Wang Q, Lin Q. An ESIPT-based two-photon fluorescent probe detection of hydrogen peroxide in live cells and tissues. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 167:264-268. [DOI: 10.1016/j.jphotobiol.2017.01.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 01/08/2017] [Indexed: 01/01/2023]
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10
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Mason T, Snell K, Mittge E, Melancon E, Montgomery R, McFadden M, Camoriano J, Kent ML, Whipps CM, Peirce J. Strategies to Mitigate a Mycobacterium marinumOutbreak in a Zebrafish Research Facility. Zebrafish 2016. [DOI: 10.1089/zeb.2015.1218.rev] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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11
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Van houcke J, De Groef L, Dekeyster E, Moons L. The zebrafish as a gerontology model in nervous system aging, disease, and repair. Ageing Res Rev 2015; 24:358-68. [PMID: 26538520 DOI: 10.1016/j.arr.2015.10.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 10/14/2015] [Accepted: 10/26/2015] [Indexed: 12/12/2022]
Abstract
Considering the increasing number of elderly in the world's population today, developing effective treatments for age-related pathologies is one of the biggest challenges in modern medical research. Age-related neurodegeneration, in particular, significantly impacts important sensory, motor, and cognitive functions, seriously constraining life quality of many patients. Although our understanding of the causal mechanisms of aging has greatly improved in recent years, animal model systems still have much to tell us about this complex process. Zebrafish (Danio rerio) have gained enormous popularity for this research topic over the past decade, since their life span is relatively short but, like humans, they are still subject to gradual aging. In addition, the extensive characterization of its well-conserved molecular and cellular physiology makes the zebrafish an excellent model to unravel the underlying mechanisms of aging, disease, and repair. This review provides a comprehensive overview of the progress made in zebrafish gerontology, with special emphasis on nervous system aging. We review the evidence that classic hallmarks of aging can also be recognized within this small vertebrate, both at the molecular and cellular level. Moreover, we illustrate the high level of similarity with age-associated human pathologies through a survey of the functional deficits that arise as zebrafish age.
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Jeong YM, Jin TE, Choi JH, Lee MS, Kim HT, Hwang KS, Park DS, Oh HW, Choi JK, Korzh V, Schachner M, You KH, Kim CH. Induction of clusterin expression by neuronal cell death in Zebrafish. J Genet Genomics 2014; 41:583-9. [PMID: 25434681 DOI: 10.1016/j.jgg.2014.08.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 08/18/2014] [Accepted: 08/30/2014] [Indexed: 02/05/2023]
Abstract
Clusterin, a protein associated with multiple functions, is expressed in a wide variety of mammalian tissues. Although clusterin is known to be involved in neurodegenerative diseases, ageing, and tumorigenesis, a detailed analysis of the consequences of gain- or loss-of-function approaches has yet to be performed to understand the underlying mechanisms of clusterin functions. Since clusterin levels change in neurological diseases, it is likely that clusterin contributes to cell death and degeneration in general. Zebrafish was investigated as a model system to study human diseases. During development, zebrafish clusterin was expressed in the notochord and nervous system. Embryonic overexpression of clusterin by mRNA microinjection did not affect axis formation, whereas its knock-down by anti-sense morpholino treatment resulted in neuronal cell death. To analyze the function of clusterin in neurodegeneration, a transgenic zebrafish was investigated, in which nitroreductase expression is regulated under the control of a neuron-specific huC promoter which is active between the stages of early neuronal precursors and mature neurons. Nitroreductase turns metronidazole into a cytotoxic agent that induces cell death within 12 h. After metronidazole treatment, transgenic zebrafish showed neuron-specific cell death. Interestingly, we also observed a dramatic induction of clusterin expression in the brain and spinal cord in these fish, suggesting a direct or indirect role of clusterin in neuronal cell death and thus, more generally, in neurodegeneration.
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Affiliation(s)
- Yun-Mi Jeong
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Tae-Eun Jin
- Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-333, Republic of Korea
| | - Jung-Hwa Choi
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Mi-Sun Lee
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Hyun-Taek Kim
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Kyu-Seok Hwang
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Doo-Sang Park
- Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-333, Republic of Korea
| | - Hyun-Woo Oh
- Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-333, Republic of Korea
| | - Joong-Kook Choi
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju 361-763, Republic of Korea
| | - Vladimir Korzh
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore
| | - Melitta Schachner
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ 08854-8082, USA; Center for Neuroscience, Shantou University Medical College, Shantou 515041, China.
| | - Kwan-Hee You
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea.
| | - Cheol-Hee Kim
- Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea.
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Gilbert MJH, Zerulla TC, Tierney KB. Zebrafish (Danio rerio) as a model for the study of aging and exercise: physical ability and trainability decrease with age. Exp Gerontol 2013; 50:106-13. [PMID: 24316042 DOI: 10.1016/j.exger.2013.11.013] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Revised: 10/05/2013] [Accepted: 11/26/2013] [Indexed: 12/21/2022]
Abstract
A rapidly aging global population has motivated the development and use of models for human aging. Studies on aging have shown parallels between zebrafish and humans at the internal organization level; however, few parallels have been studied at the whole-organism level. Furthermore, the effectiveness of exercise as a method to mitigate the effects of aging has not been studied in zebrafish. We investigated the effects of aging and intermittent exercise on swimming performance, kinematics and behavior. Young, middle-aged and old zebrafish (20-29, 36-48 and 60-71% of average lifespan, respectively) were exercised to exhaustion in endurance and sprint swimming tests once a week for four weeks. Both endurance and sprint performance decreased with increased age. Swimming performance improved with exercise training in young and middle-aged zebrafish, but not in old zebrafish. Tail-beat amplitude, which is akin to stride length in humans, increased for all age groups with training. Zebrafish turning frequency, which is an indicator of routine activity, decreased with age but showed no change with exercise. In sum, our results show that zebrafish exhibit a decline in whole-organism performance and trainability with age. These findings closely resemble the senescence-related declines in physical ability experienced by humans and mammalian aging models and therefore support the use of zebrafish as a model for human exercise and aging.
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Affiliation(s)
| | - Tanja C Zerulla
- Department of Biology, University of Alberta, Edmonton, Alberta, Canada
| | - Keith B Tierney
- Department of Biology, University of Alberta, Edmonton, Alberta, Canada.
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