The role of apoptosis in MCLR-induced developmental toxicity in zebrafish embryos

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	The role of apoptosis in MCLR-induced developmental toxicity in zebrafish embryos
	Zeng, Cheng 1; Sun, Hong 2; Xie, Ping 3; Wang, Jianghua 1; Zhang, Guirong 1; Chen, Nan 1; Yan, Wei 5; Li, Guangyu 1,4
刊名	AQUATIC TOXICOLOGY
	2014-04-01
卷号	149 页码:25-32
关键词	MCLR Zebrafish Embryo Apoptosis Developmental toxicity
ISSN号	0166-445X
通讯作者	Li, GY (reprint author), Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China.
中文摘要	We previously demonstrated that cyanobacteria-derived microcystin-leucine-arginine (MCLR) is able to induce developing toxicity, such as malformation, growth delay and also decreased heart rates in zebrafish embryos. However, the molecular mechanisms by which MCLR induces its toxicity during the development of zebrafish remain largely unknown. Here, we evaluate the role of apoptosis in MCLRinduced developmental toxicity. Zebrafish embryos were exposed to various concentrations of MCLR (0, 0.2, 0.5, 2, and 5.0 mg L-1) for 96 h, at which time reactive oxygen species (ROS) was significantly induced in the 2 and 5.0 mg L-1 MCLR exposure groups. Acridine orange (AO) staining and terminal deoxynucleotide transferase-mediated deoxy-UTP nick end labelling (TUNEL) assay showed that MCLR exposure resulted in cell apoptosis. To test the apoptotic pathway, the expression pattern of several apoptoticrelated genes was examined for the level of enzyme activity, gene and protein expression, respectively. The overall results demonstrate that MCLR induced ROS which consequently triggered apoptosis in the heart of developing zebrafish embryos. Our results also indicate that the p53-Bax-Bc1-2 pathway and the caspase-dependent apoptotic pathway play major roles in MCLR-induced apoptosis in the developing embryos. (C) 2014 Elsevier B.V. All rights reserved.
英文摘要	We previously demonstrated that cyanobacteria-derived microcystin-leucine-arginine (MCLR) is able to induce developing toxicity, such as malformation, growth delay and also decreased heart rates in zebrafish embryos. However, the molecular mechanisms by which MCLR induces its toxicity during the development of zebrafish remain largely unknown. Here, we evaluate the role of apoptosis in MCLRinduced developmental toxicity. Zebrafish embryos were exposed to various concentrations of MCLR (0, 0.2, 0.5, 2, and 5.0 mg L-1) for 96 h, at which time reactive oxygen species (ROS) was significantly induced in the 2 and 5.0 mg L-1 MCLR exposure groups. Acridine orange (AO) staining and terminal deoxynucleotide transferase-mediated deoxy-UTP nick end labelling (TUNEL) assay showed that MCLR exposure resulted in cell apoptosis. To test the apoptotic pathway, the expression pattern of several apoptoticrelated genes was examined for the level of enzyme activity, gene and protein expression, respectively. The overall results demonstrate that MCLR induced ROS which consequently triggered apoptosis in the heart of developing zebrafish embryos. Our results also indicate that the p53-Bax-Bc1-2 pathway and the caspase-dependent apoptotic pathway play major roles in MCLR-induced apoptosis in the developing embryos. (C) 2014 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Marine & Freshwater Biology ; Toxicology
研究领域[WOS]	Marine & Freshwater Biology ; Toxicology
关键词[WOS]	CARP CYPRINUS-CARPIO ; MICROCYSTIN-LR ; DANIO-RERIO ; HEPATOTOXIC MICROCYSTINS ; CYANOBACTERIAL TOXINS ; OXIDATIVE STRESS ; GENE-EXPRESSION ; CRUDE EXTRACTS ; EUTROPHIC LAKE ; FISH
收录类别	SCI
资助信息	National Nature Science Foundation of China (NSFC) [31200402]; Specialized Research Fund for the Doctoral Programme of Higher Education (SRFDP) [20120146120008]; Fundamental Research Funds for the Central Universities (Programme) [2013 PY037]; State Key Laboratory of Freshwater Ecology and Biotechnology of China [2013FB17]; Natural Science Foundation of Hubei Province of China [2012FFB01401]; NSFC [31000249]
语种	英语
WOS记录号	WOS:000334989300004
公开日期	2014-08-07
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/20016]
专题	水生生物研究所_淡水生态学研究中心_期刊论文
作者单位	1.Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China 2.Hubei Maternal & Child Hlth Hosp, Wuhan 430070, Peoples R China 3.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol China, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China 4.Freshwater Aquaculture Collaborat Innovat Ctr Hub, Wuhan 430070, Peoples R China 5.Hubei Acad Agr Sci, Inst Agr Qual Stand & Testing Technol, Wuhan 430064, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Cheng,Sun, Hong,Xie, Ping,et al. The role of apoptosis in MCLR-induced developmental toxicity in zebrafish embryos[J]. AQUATIC TOXICOLOGY,2014,149:25-32.
APA	Zeng, Cheng.,Sun, Hong.,Xie, Ping.,Wang, Jianghua.,Zhang, Guirong.,...&Li, Guangyu.(2014).The role of apoptosis in MCLR-induced developmental toxicity in zebrafish embryos.AQUATIC TOXICOLOGY,149,25-32.
MLA	Zeng, Cheng,et al."The role of apoptosis in MCLR-induced developmental toxicity in zebrafish embryos".AQUATIC TOXICOLOGY 149(2014):25-32.