Transcriptional Responses of Stress-Related Genes in Pale Chub ( Zacco platypus ) Inhabiting Different Aquatic Environments: Application for Biomonitoring Aquatic Ecosystems

Won-Seok Kim, Kiyun Park, Jae-Won Park, Sun-Ho Lee, Ji-Hoon Kim, Yong-Jun Kim, Gun-Hee Oh, Bong-Soon Ko, Ji-Won Park, Cheol Hong, Tae-Sik Yu and Ihn-Sil Kwak ()
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Won-Seok Kim: Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Korea
Kiyun Park: Fisheries Science Institute, Chonnam National University, Yeosu 59626, Korea
Jae-Won Park: Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Korea
Sun-Ho Lee: Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Korea
Ji-Hoon Kim: Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Korea
Yong-Jun Kim: Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Korea
Gun-Hee Oh: Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Korea
Bong-Soon Ko: Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Korea
Ji-Won Park: Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Korea
Cheol Hong: Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Korea
Tae-Sik Yu: Fisheries Science Institute, Chonnam National University, Yeosu 59626, Korea
Ihn-Sil Kwak: Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Korea

IJERPH, 2022, vol. 19, issue 18, 1-12

Abstract: Pale chub ( Zacco platypus ) is a dominant species in urban rivers and reservoirs, and it is used as an indicator to monitor the effects of environmental contaminants. Gene responses at the molecular level can reflect the health of fish challenged with environmental stressors. The objective of this study was to identify correlations between water quality factors and the expression of stress-related genes in Z. platypus from different lake environments (Singal and Juam Lakes). To do so, transcriptional responses of genes involving cellular homeostasis (heat-shock protein 70, HSP70 ; heat-shock protein 90, HSP90 ), metal detoxification (metallothionein, MT ), and antioxidation (superoxide dismutase, SOD ; catalase, CAT ) were analyzed in the gill and liver tissues of Z. platypus . HSP70 , HSP90 , and MT genes were overall upregulated in Z. platypus from Singal Lake, which suffered from poorer water quality than Juam Lake. In addition, gene responses were significantly higher in Singal Lake outflow. Upregulation of HSP70 , HSP90 , and MT was significantly higher in Z. platypus gills than in the liver tissue. In addition, integrated biomarker response and heatmap analysis determined correlations between expression of biomarker genes or water quality factors and sampling sites of both lakes. These results suggest that stress-related genes used as multiple biomarkers may reflect spatial characteristics and water quality of different lake environments, and they can be used for biomonitoring and ecological risk assessment.

Keywords: Zacco platypus; stress-related genes; transcriptional expression; integrated biomarker response; lake environment (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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