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Zhang Y, Jia C, Li S, Wang S, He Z, Wu G, Yu M, Lu Y, Yu D. Comparative genome-wide association study on body weight in Chinese native ducks using four models. Poult Sci 2024; 103:103899. [PMID: 38909509 PMCID: PMC11253684 DOI: 10.1016/j.psj.2024.103899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 05/18/2024] [Accepted: 05/20/2024] [Indexed: 06/25/2024] Open
Abstract
The Jinling White duck represents a newly developed breed characterized by a rapid growth rate and a superior meat quality, offering significant economic value and research potential; however, the genetic basis underlying their body weight traits remains less understood. Here, we performed whole-genome resequencing for 201 diverse Jinling White male ducks and conducted population genomic analyses, suggesting a rich genetic diversity within the Jinling White duck population. Equipped with our genomic resources, we applied genome-wide association analysis for body weight on birth (BWB), body weight on 1 wk (BW1), body weight on 3 wk (BW3), body weight on 5 wk (BW5) and body weight on 7 wk (BW7) using 4 statistical models. Comparative studies indicated that factored spectrally transformed linear mixed models (FaST-LMM) demonstrated the most superior efficiency, yielding more results with the minimal false positives. We discovered that PUS7, FBXO11, FOXN2, MSH6, and SLC4A4 were associated with BWB. RAG2, and TMEFF2 were candidate genes for BW1, and STARD13, Klotho, ZAR1L are likely candidates for BW3 and BW5. PLXNC1, ATP1A1, CD58, FRYL, OCIAD1, and OCIAD2 were linked to BW7. These findings provide a genetic reference for the selection and breeding of Jinling White ducks, while also deepened our understanding of Growth and development phenotypic in ducks.
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Affiliation(s)
- Yuchen Zhang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Chao Jia
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Shiwei Li
- College of Animal Science, Xizang Agricultural and Animal Husbandry University, Linzhi 860000, China
| | - Sike Wang
- College of Animal Science, Xizang Agricultural and Animal Husbandry University, Linzhi 860000, China
| | - Zongliang He
- Nanjing Academy of Animal Husbandry and Poultry, Nanjing, Jiangsu, 210000, China
| | - Guansuo Wu
- Nanjing Academy of Animal Husbandry and Poultry, Nanjing, Jiangsu, 210000, China
| | - Minli Yu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Yinglin Lu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Debing Yu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China.
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Huang YY, Paul GV, Hsu T. Thallium(I) induces a prolonged inhibition of (6-4)photoproduct binding and UV damage excision repair activities in zebrafish (Danio rerio) embryos via protein inactivation. Chem Biol Interact 2024; 388:110837. [PMID: 38104746 DOI: 10.1016/j.cbi.2023.110837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/09/2023] [Accepted: 12/15/2023] [Indexed: 12/19/2023]
Abstract
Cyclobutane pyrimidine dimer (CPD) and (6-4)photoproduct (6-4 PP) are two major types of UV-induced DNA lesion and 6-4 PP is more mutagenic than CPD. Activated by lesion detection, nucleotide excision repair (NER) eliminates CPDs and 6-4 PPs. Thallium (Tl) is a toxic metal existing primarily as Tl+ in the aquatic environment. Ingestion of Tl+-contaminated foods and water is a major route of human poisoning. As Tl+ may inhibit enzyme activities via binding to sulfhydryl groups, this study explored if Tl+ could intensify UV mutagenicity by inactivating NER-linked damage recognition factors using zebrafish (Danio rerio) embryo as a model system. Incubation of Tl+ (as thallium nitrate) at 0.1-0.4 μg/mL with zebrafish extracts for 20 min caused a concentration-dependent inhibition of 6-4 PP binding activities as shown by a photolesion-specific band shift assay, while CPD binding activities were insensitive to Tl+. The ability of Tl+ to suppress 6-4 PP detection was stronger than that of Hg2+. Exposure of zebrafish embryos at 1 h post fertilization (hpf) to Tl+ at 0.4-1 μg/mL for 9 or 71 h also specifically inhibited 6-4 PP detection, indicating that Tl+ induced a prolonged inhibition of 6-4 PP sensing ability primarily via its direct interaction with damage recognition molecules. Tl+-mediated inhibition of 6-4 PP binding in embryos at distinct stages resulted in a suppression of NER capacity monitored by a transcription-based DNA repair assay. Our results revealed the potential of Tl+ to enhance UV mutagenicity by disturbing the removal of 6-4 PP through repressing the lesion detection step of NER.
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Affiliation(s)
- Ya-Yun Huang
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 202301, Taiwan
| | - Ganjai Vikram Paul
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 202301, Taiwan
| | - Todd Hsu
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 202301, Taiwan.
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Paul GV, Sihite AC, Hsu T. Susceptibility of DNA damage recognition activities linked to nucleotide excision and mismatch repair in zebrafish (Danio rerio) early and mid-early embryos to 2.5 to 4.5 °C heat stress. FISH PHYSIOLOGY AND BIOCHEMISTRY 2023; 49:515-527. [PMID: 37133645 DOI: 10.1007/s10695-023-01198-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 04/12/2023] [Indexed: 05/04/2023]
Abstract
Fish at early life stages are sensitive to temperature change because of their narrower temperature tolerance ranges. Initiated by damage detection, DNA mismatch repair (MMR) and nucleotide excision repair (NER) maintain genome integrity respectively by eliminating mismatched nucleotides and helix-distorting DNA lesions. As discharge of heated effluent from power plants may elevate water temperatures to only 2 to 6 °C higher than ambient, this study explored if temperatures within this range affected MMR and NER-linked damage detection activities in fish embryos using zebrafish (Danio rerio) embryo as a model organism. Exposure of early embryos at 10 h post fertilization (hpf) to a warmer temperature at + 4.5 °C for 30 min enhanced damage recognition activities targeting UV-induced cyclobutane pyrimidine dimers (CPDs) and (6-4) photoproducts (6-4PPs) that distorted helical structures. Conversely, photolesions sensing activities were inhibited in 24 hpf mid-early embryos under the same stress conditions. A much higher temperature at + 8.5 °C imposed similar effects on UV damage detection. A mild heat stress at + 2.5 °C for 30 min, however, repressed both CPD and 6-4PP binding activities in 10 and 24 hpf embryos. Inhibition of damage recognition under mild heat stress impeded the overall NER capacity evidenced by a transcription-based repair assay. Warmer water temperatures at + 2.5 and + 4.5 °C also inhibited G-T mismatch binding activities in 10 and 24 hpf embryos, but G-T recognition was more sensitive to + 4.5 °C stress. Inhibition of G-T binding partially correlated with a downregulation of Sp1 transcription factor activity. Our results showed the potential of water temperature elevation within 2 to 4.5 °C to disturb DNA damage repair in fish at embryonic stages.
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Affiliation(s)
- Ganjai Vikram Paul
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 202301, Taiwan
| | - Agatha Cecilia Sihite
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 202301, Taiwan
| | - Todd Hsu
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 202301, Taiwan.
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Paul GV, Huang YY, Wu YN, Ho TN, Hsiao HI, Hsu T. Aluminum (Al) causes a delayed suppression of nucleotide excision repair (NER) capacity in zebrafish (Danio rerio) embryos via disturbance of DNA lesion detection. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 242:113902. [PMID: 35868178 DOI: 10.1016/j.ecoenv.2022.113902] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 07/08/2022] [Accepted: 07/17/2022] [Indexed: 06/15/2023]
Abstract
Aluminum (Al) is extensively used for making cooking utensils and its presence in the aquatic environment may occur through acid mine drainage and wastewater discharge. Al is known to induce genotoxicity in human cells, rodents, and fish. Nucleotide excision repair (NER) eliminates helix-twisting DNA lesions such as UV-induced dipyrimidine photoproducts. Because our earlier investigation revealed the operation of NER in zebrafish (Danio rerio) embryos, this study explored if inhibition of NER could be a mechanism of Al-induced genotoxicity using zebrafish embryo as a model system. An acute fish embryo toxicity test indicated that Al (as aluminum sulfate) at 2-15 mg/L were nonlethal to zebrafish embryos, yet exposure of embryos at 1 h post fertilization (hpf) to Al at 10-15 mg/L for 71 h significantly repressed their NER capacity monitored by a transcription-based DNA repair assay. Band shift analysis indicated a higher sensitivity of (6-4) photoproduct (6-4PP) than cyclobutane pyrimidine dimer (CPD) detecting activities to Al, reflecting the preferential influence of Al on the detection of strongly distorted DNA lesions. Time-course experiments showed a delayed response of NER to Al as repair machinery was unaffected by Al at 15 mg/L following a 35-h exposure, while Al treatment for the same period obviously inhibited 6-4PP binding activities although the gene expression of damage recognition factors remained active. Inhibition of 6-4PP detection blocked downstream lesion incision/excision detected by a terminal deoxy transferase-mediated end labeling assay. As the disturbance of damage sensing preceded that of the overall repair process, Al exposure was believed to downregulate NER capacity by inhibiting the activities of lesion detection proteins. Our results revealed the ability of Al to enhance its genotoxicity by suppressing NER capacity.
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Affiliation(s)
- Ganjai Vikram Paul
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 202301, Taiwan
| | - Ya-Yun Huang
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 202301, Taiwan
| | - Yu-Ning Wu
- Graduate Institute of Food Safety and Risk Management, National Taiwan Ocean University, Keelung, 202301, Taiwan
| | - Tsung-Nan Ho
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 202301, Taiwan
| | - Hsin-I Hsiao
- Graduate Institute of Food Safety and Risk Management, National Taiwan Ocean University, Keelung, 202301, Taiwan; Department of Food Science, National Taiwan Ocean, University, Keelung, 202301, Taiwan
| | - Todd Hsu
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 202301, Taiwan.
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Ho TN, Paul GV, Chen YH, Hsu T. Heat stress upregulates G-T mismatch binding activities in zebrafish (Danio rerio) embryos preexposed and nonexposed to a sublethal level of cadmium (Cd). CHEMOSPHERE 2019; 218:179-188. [PMID: 30471498 DOI: 10.1016/j.chemosphere.2018.11.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 11/02/2018] [Accepted: 11/04/2018] [Indexed: 05/20/2023]
Abstract
G-T mispair frequently appears in eukaryotic DNA due to the spontaneous deamination of 5-methylcytosine paired with guanine and is therefore an important target for DNA mismatch repair (MMR). Our earlier studies showed the downregulation of G-T binding activities in cadmium (Cd)-exposed (Danio rerio) embryos. Since elevation of water temperature was reported to increase Cd toxicity in zebrafish, this study explored whether heat stress affected zebrafish mismatch binding capacity in the absence or presence of Cd. Heat stress (37 °C for 30 min) induced heat shock protein 70 mRNA expression in embryos at 10 and 24 h post fertilization (hpf). Heat stress weakly upregulated normal G-T sensing machinery and inhibited G-T recognition activity in embryos preexposed to 3 μM Cd for 9 h. Either heat shock or a 23-h Cd treatment alone caused a 1.7-fold stimulation of G-T binding capacity in 24 hpf embryos and heat stress of Cd-preexposed embryos further enhanced G-T binding activity to 2.5 fold of control. Normal and Cd-downregulated loop binding activities in 10 and 24 hpf embryos were almost unreactive to heat shock. Heat stress-upregulated G-T sensing in nonexposed, but not in Cd-preexposed, 24 hpf embryos correlated with stronger gene activities encoding MMR-linked mismatch detecting factors MutS homolog 2 and 6 plus a higher DNA binding activity of the transcription factor Sp1 that regulates msh2/msh6 expression. Our results suggested the importance of heat shock response in facilitating the correction of G-T mismatch in developing zebrafish even under Cd exposure.
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Affiliation(s)
- Tsung-Nan Ho
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, No.2, Pei-Ning Rd. Keelung, 20224, Taiwan, Republic of China
| | - Ganjai Vikram Paul
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, No.2, Pei-Ning Rd. Keelung, 20224, Taiwan, Republic of China
| | - Yen-Hung Chen
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, No.2, Pei-Ning Rd. Keelung, 20224, Taiwan, Republic of China
| | - Todd Hsu
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, No.2, Pei-Ning Rd. Keelung, 20224, Taiwan, Republic of China.
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Shen YC, Hsu T, Ling LB, You WC, Liu CW. Identification of low-molecular-weight vitellogenin 1 (Vg1)-like proteins as nucleotide excision repair (NER) factors in developing zebrafish (Danio rerio) using a transcription-based DNA repair assay. FISH PHYSIOLOGY AND BIOCHEMISTRY 2017; 43:663-676. [PMID: 28074418 DOI: 10.1007/s10695-016-0321-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 11/28/2016] [Indexed: 06/06/2023]
Abstract
Nucleotide excision repair (NER) removes helix-distorting DNA lesions such as UV-induced pyrimidine dimers and cisplatin-induced strand crosslinking. Our earlier studies have identified low-molecular-weight proteins homologous to the 150-kDa vitellogenin 1 (Vg1) as UV-damaged DNA-binding factors expressed in developing zebrafish (Danio rerio). This present study explored if Vg1-like proteins also participated in NER in zebrafish. Immunoblot analysis of affinity-captured 12 h post-fertilization (hpf) zebrafish extract proteins showed a transient binding of a 30-kDa Vg1-like polypeptide to UV-damaged DNA. A transcription-based in vitro repair assay revealed a significant up-regulation of UVC or cisplatin-suppressed transcriptional activity of a marker cDNA driven by a SP6 RNA polymerase-regulated promotor after incubating the damaged plasmid with the extracts of 12 hpf embryos or 96 hpf larvae. The up-regulation of UV or cisplatin-suppressed transcription was abolished in the presence of a monoclonal anti-zebrafish Vg1 antibody. The differential sensitivity of UV-induced repair in 12 and 96 hpf zebrafish extracts to exogenous ATP suggested a development-dependent expression of Vg1-like NER factors. A T4 endonuclease V digestion assay showed no inhibition of the anti-Vg1 antibody on the excision of UV-induced cyclobutane pyrimidine dimers. Our results identified the participation of Vg1-like factors in NER in developing zebrafish, and these factors may function at post-incison steps of NER.
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Affiliation(s)
- Yung-Chi Shen
- Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Keelung, 204, Taiwan
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Todd Hsu
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan.
| | - Li-Bin Ling
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Wen-Chian You
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Chia-Wei Liu
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan
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Ling LB, Chang Y, Liu CW, Lai PL, Hsu T. Oxidative stress intensity-related effects of cadmium (Cd) and paraquat (PQ) on UV-damaged-DNA binding and excision repair activities in zebrafish (Danio rerio) embryos. CHEMOSPHERE 2017; 167:10-18. [PMID: 27705808 DOI: 10.1016/j.chemosphere.2016.09.068] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 09/13/2016] [Accepted: 09/15/2016] [Indexed: 06/06/2023]
Abstract
Our earlier studies showed the inhibitory effects of cadmium (Cd) and paraquat (PQ) on the gene expression of DNA mismatch recognition proteins in zebrafish (Danio rerio) embryos. This study explored the effects of Cd and PQ on nucleotide excision repair (NER) capacity in zebrafish embryos. Exposure of embryos at 1 h post fertilization (hpf) to 3-5 μM Cd or 30-100 μM PQ for 9 h induced a 2-3-fold increase of oxidative stress, while a 6.5-fold increase of oxidative stress was induced by 200 μM PQ. Real-time RT-PCR detected a down-regulated xeroderma pigmentosum C (XPC) and an up-regulated UV-DDB2 gene expression in mildly-stressed embryos, whereas 8-oxoguanine DNA glycosylase (OGG1) gene expression increased with PQ exposure levels. NER of UV-damaged DNA was enhanced in weakly oxidant-stressed embryos as shown by a transcription-based DNA repair assay, yet repair activities of both UV and cisplatin-damaged DNA were inhibited in embryos exposed to 200 μM PQ. Band shift assay showed a suppression of cyclobutane pyrimidine dimer (CPD) binding activity in all stressed embryos. In contrast, (6-4) photoproduct (6-4PP) recognition activity was weakly stimulated except in embryos exposed to 200 μM PQ, revealing a link of NER capacity to 6-4PP binding. Our results showed that Cd and PQ imposed similar inducing effects on UV-DDB2 gene expression, NER of UV-damaged DNA and 6-4PP binding activity in zebrafish embryo under low levels of oxidative stress and NER capacity could be inhibited if the intensity of oxidative stress increased to a critical level.
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Affiliation(s)
- Li-Bin Ling
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, No.2, Pei-Ning Rd., Keelung 20224, Taiwan, Republic of China
| | - Yung Chang
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, No.2, Pei-Ning Rd., Keelung 20224, Taiwan, Republic of China
| | - Chia-Wei Liu
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, No.2, Pei-Ning Rd., Keelung 20224, Taiwan, Republic of China
| | - Po-Ling Lai
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, No.2, Pei-Ning Rd., Keelung 20224, Taiwan, Republic of China
| | - Todd Hsu
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans, National Taiwan Ocean University, No.2, Pei-Ning Rd., Keelung 20224, Taiwan, Republic of China.
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Chen Y, Huang C, Bai C, Du C, Liao J, Dong Q. In vivo DNA mismatch repair measurement in zebrafish embryos and its use in screening of environmental carcinogens. JOURNAL OF HAZARDOUS MATERIALS 2016; 302:296-303. [PMID: 26476317 DOI: 10.1016/j.jhazmat.2015.09.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/24/2015] [Accepted: 09/26/2015] [Indexed: 06/05/2023]
Abstract
Impairment of DNA mismatch repair (MMR) function leads to the development and progression of certain cancers. Many environmental contaminants can target DNA MMR system. Currently, measurement of MMR activity is limited to in vitro or in vivo methods at the cell line level, and reports on measurement of MMR activity at the live organism level are lacking. Here, we report an efficient method to measure DNA MMR activity in zebrafish embryos. A G-T mismatch was introduced into enhanced green fluorescent protein (EGFP) gene. Repair of the G-T mismatch to G-C in the heteroduplex plasmid generates a functional EGFP expression. The heteroduplex plasmid and a similarly constructed homoduplex plasmid were injected in parallel into the same batch of embryos at 1-cell stage and EGFP expression in EGFP positive embryos was quantified at 24 h after injection. MMR efficiency was calculated as the total fluorescence intensity of embryos injected with the heteroduplex construct divided by that of embryos injected with the homoduplex construct. Our results showed 73% reduction of MMR activity in embryos derived from MMR-deficient mlh1 mutant fish (positive control) when compared with embryos from MMR-competent wild type AB line fish, indicating feasibility of in vivo MMR activity measurement in zebrafish embryos. We further applied this novel assay for measurement of MMR efficiency in embryos exposed to environmental chemicals such as cadmium chloride (CdCl2), benzo[a]pyrene (BaP), and perfluorooctanesulphonic acid (PFOS) from 6 hpf to 24 hpf. We observed significant reductions of MMR efficiency in embryos exposed to 0.1 μM CdCl2 (52%) and 0.5 μM BaP (34%), but no effect in embryos exposed to PFOS. Our study for the first time provides a model system for in vivo measurement of DNA MMR activity at the organism level, which has important implications in risk assessment of various environmental carcinogens.
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Affiliation(s)
- Yuanhong Chen
- Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Changjiang Huang
- Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China.
| | - Chenglian Bai
- Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Changchun Du
- Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Junhua Liao
- Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Qiaoxiang Dong
- Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China; School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, PR China.
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Ho TN, Sung ST, Huang KM, Hsu T. Comparative Effects of Mercury(II) and Cadmium on MutS Homolog 6(MSH6)-Mediated DNA Mismatch Binding Activities in Zebrafish (Danio rerio) Embryos. J Biochem Mol Toxicol 2015; 29:513-20. [DOI: 10.1002/jbt.21721] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 05/19/2015] [Accepted: 05/26/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Tsung-Nan Ho
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans; National Taiwan Ocean University; Keelung 20224 Taiwan Republic of China
| | - Shih-Tsung Sung
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans; National Taiwan Ocean University; Keelung 20224 Taiwan Republic of China
| | - Kuan-Ming Huang
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans; National Taiwan Ocean University; Keelung 20224 Taiwan Republic of China
| | - Todd Hsu
- Department of Bioscience and Biotechnology and Center of Excellence for the Oceans; National Taiwan Ocean University; Keelung 20224 Taiwan Republic of China
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Pei DS, Strauss PR. Zebrafish as a model system to study DNA damage and repair. Mutat Res 2013; 743-744:151-159. [PMID: 23211879 DOI: 10.1016/j.mrfmmm.2012.10.003] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 10/19/2012] [Accepted: 10/23/2012] [Indexed: 05/20/2023]
Abstract
Zebrafish (Danio rerio) have become a popular vertebrate model to study embryological development, because of unique advantages not found in other model systems. Zebrafish share many gene functions with other vertebrates including humans, making zebrafish a useful system for studying cancer etiology. However, systematic studies of DNA damage and repair pathways using adult or embryonic zebrafish have not been extensively reported. The zebrafish genome contains nearly all the genes involved in different DNA repair pathways in eukaryotes, including direct reversal (DR), mismatch repair (MMR) nucleotide excision repair (NER), base excision repair (BER), homologous recombination (HR), non-homologous end joining (NHEJ) and translesion synthesis (TLS). It also includes the genes of the p53-mediated damage recognition pathway. Therefore, zebrafish provide an ideal model for gaining fundamental insights into mechanisms of DNA damage and repair, especially during embryological development. This review introduces recent work on different DNA damage and repair studies in zebrafish, with special emphasis on the role of BER in zebrafish early embryological development. AP endonuclease 1 (Apex1), a critical protein in the BER pathway, not only regulates BER but also controls cyclic AMP response binding protein (Creb1), which itself regulates ∼25% of eukaryotic coding sequences. In addition, Apex1 indirectly regulates levels of p53. As these findings also occur in murine B cells, they illustrate the usefulness of the zebrafish system in elucidating fundamental mechanisms.
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Affiliation(s)
- De-Sheng Pei
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, China; Department of Biology, Northeastern University, Boston, MA 02115, USA.
| | - Phyllis R Strauss
- Department of Biology, Northeastern University, Boston, MA 02115, USA.
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Hsu T, Huang KM, Tsai HT, Sung ST, Ho TN. Cadmium(Cd)-induced oxidative stress down-regulates the gene expression of DNA mismatch recognition proteins MutS homolog 2 (MSH2) and MSH6 in zebrafish (Danio rerio) embryos. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 126:9-16. [PMID: 23143036 DOI: 10.1016/j.aquatox.2012.09.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 09/28/2012] [Accepted: 09/28/2012] [Indexed: 06/01/2023]
Abstract
DNA mismatch repair (MMR) of simple base mismatches and small insertion-deletion loops in eukaryotes is initiated by the binding of the MutS homolog 2 (MSH2)-MSH6 heterodimer to mismatched DNA. Cadmium (Cd) is a genotoxic heavy metal that has been recognized as a human carcinogen. Oxidant stress and inhibition of DNA repair have been proposed as major factors underlying Cd genotoxicity. Our previous studies indicated the ability of Cd to disturb the gene expression of MSH6 in zebrafish (Danio rerio) embryos. This study was undertaken to explore if Cd-induced oxidative stress down-regulated MSH gene activities. Following the exposure of zebrafish embryos at 1 h post fertilization (hpf) to sublethal concentrations of Cd at 3-5 μM for 4 or 9 h, a parallel down-regulation of MSH2, MSH6 and Cu/Zn superoxide dismutase (Cu/Zn-SOD) gene expression was detected by real-time RT-PCR and the expression levels were 40-50% of control after a 9-h exposure. Cd exposure also induced oxidative stress, yet no inhibition of catalase gene activity was observed. Whole mount in situ hybridization revealed a wide distribution of msh6 mRNA in the head regions of 10 hpf embryos and pretreatment of embryos with antioxidants butylhydroxytoluene (BHT), d-mannitol or N-acetylcysteine (NAC) at 1-10 μM restored Cd-suppressed msh6 expression. QPCR confirmed the protective effects of antioxidants on Cd-suppressed msh2/msh6 mRNA production. Down-regulated MSH gene activities reaching about 50% of control were also induced in embryos exposed to paraquat, a reactive oxygen species (ROS)-generating herbicide, or hydrogen peroxide at 200 μM. Hence, Cd at sublethal levels down-regulates msh2/msh6 expression primarily via ROS as signaling molecules. The transcriptional activation of human msh6 is known to be fully dependent on the specificity factor 1 (Sp1). Cd failed to inhibit the DNA binding activity of zebrafish Sp1 unless at lethal concentrations based on band shift assay, therefore excluding the involvement of Sp1 inactivation in Cd-induced MSH gene inhibition in zebrafish embryos.
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Affiliation(s)
- Todd Hsu
- Institute of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, ROC.
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LIN CHUYIN, LIN WENWEN, KAO HSIAOWEI. The complete mitochondrial genome of the mackerel icefish, Champsocephalus gunnari (Actinopterygii: Channichthyidae), with reference to the evolution of mitochondrial genomes in Antarctic notothenioids. Zool J Linn Soc 2012. [DOI: 10.1111/j.1096-3642.2012.00820.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hsu T, Tsai HT, Huang KM, Luan MC, Hsieh CR. Sublethal levels of cadmium down-regulate the gene expression of DNA mismatch recognition protein MutS homolog 6 (MSH6) in zebrafish (Danio rerio) embryos. CHEMOSPHERE 2010; 81:748-54. [PMID: 20696460 DOI: 10.1016/j.chemosphere.2010.07.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Revised: 07/05/2010] [Accepted: 07/12/2010] [Indexed: 05/11/2023]
Abstract
MutS homolog 6 (MSH6) is the major mismatch contacting component of the MSH2-MSH6 heterodimeric complex (MutSα) that mediates DNA mismatch repair (MMR) of simple mispairs and small insertion-deletion loops in eukaryotes. This study examined the potential of cadmium (Cd) to disturb the gene expression of MSH6 in vertebrates using zebrafish (Danio rerio) embryo as a model organism. Semiquantitative RT-PCR indicated that msh2 and msh6 expressions were suppressed in embryos at 1h post fertilization (hpf), then drastically up-regulated in 2 hpf embryos and actively expressed in 3-25 hpf embryos. In the presence of a constitutive β-actin expression, exposure of 1 hpf embryos to sublethal concentrations of CdCl(2) at 0.5-3 μM for 4 or 9h caused a time and concentration-dependent down-regulation of msh6 transcription. Cd failed to inhibit msh2 transcription except at 3 μM, reflecting the higher sensitivity of msh6 than msh2 transcription to Cd. Whole mount in situ hybridization showed a wide distribution of msh6 transcripts in the front body portions of 10 hpf embryos and Cd-induced a general suppression of msh6 expression in zebrafish tissues. Cd-induced down-regulation of msh6 transcription paralleled with reduced levels of MSH6 protein synthesis and MSH6-mediated G-T mismatch binding activities identified by band shift assay using recombinant zebrafish MSH6 and an anti-human MSH6 antibody. Our results revealed the inhibition of Cd on MSH6 expression at both mRNA and protein levels and this mechanism may play a role in Cd genotoxicity.
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Affiliation(s)
- Todd Hsu
- Institute of Bioscience and Biotechnology and Center for Marine Bioenvironment and Biotechnology, National Taiwan Ocean University, Keelung 20224, Taiwan, ROC.
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Yeh FL, Wang SY, Hsu LY, Wang DY, Hsu T. Cloning of the mismatch recognition protein MSH2 from zebrafish (Danio rerio) and its developmental stage-dependent mRNA expression. ACTA ACUST UNITED AC 2004; 1680:129-36. [PMID: 15488992 DOI: 10.1016/j.bbaexp.2004.08.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2003] [Revised: 06/07/2004] [Accepted: 08/03/2004] [Indexed: 11/25/2022]
Abstract
Eukaryotic mismatch repair of simple base mispairs and small insertion-deletion loops is activated by the binding of a heterodimeric complex composed of MutS homolog 2(MSH2) and MSH6. Here we report the cloning of zebrafish (Danio rerio) MSH2 (zMSH2) cDNA that has an open reading frame of 2811 nucleotides encoding a polypeptide of 936 amino acids. The deduced amino acid sequence of zMSH2 shares a 69% identity to both human and mouse MSH2. The zMSH2 protein contains a putative tyrosine-42 mismatch-contacting residue located at the N-terminal mismatch recognition region and four C-terminal ATP-binding consensus sequences conserved among MutS homologs. The 105-kDa recombinant zMSH2 bound apparently stronger to a G-T heteroduplex than to a homoduplex probe as shown by a gel shift assay. A preferential expression of both zMSH2 and zMSH6 mRNA in early embryos was found by Northern blot analysis. Whole mount in situ hybridization revealed a major expression of zMSH2 in different regions of the brain, including eyes, telencephalon, and the fourth ventricle in 12- to 48-h-old embryos. The production of zMSH2 mRNA gradually decreased in more mature 60- to 120-h-old zebrafish, reflecting a positive correlation between the amount of proliferating cells and MSH gene expression.
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Affiliation(s)
- Fu-Lung Yeh
- Institute of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung 20224, Taiwan, Republic of China
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