Affiliations 

  • 1 Centre for Marine and Coastal Studies, University Sains Malaysia, Minden, Penang 11800, Malaysia
  • 2 Fresh Water Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China
  • 3 Low-temperature Germplasm Bank of Important Economic Fish (Freshwater Fisheries Research Institute of Jiangsu Province) of Jiangsu Provincial Science and Technology Resources (Agricultural Germplasm Resources) Coordination Service Platform, Nanjing 210017, China
  • 4 Low-temperature Germplasm Bank of Important Economic Fish (Freshwater Fisheries Research Institute of Jiangsu Province) of Jiangsu Provincial Science and Technology Resources (Agricultural Germplasm Resources) Coordination Service Platform, Nanjing 210017, China; Fresh Water Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China
  • 5 Low-temperature Germplasm Bank of Important Economic Fish (Freshwater Fisheries Research Institute of Jiangsu Province) of Jiangsu Provincial Science and Technology Resources (Agricultural Germplasm Resources) Coordination Service Platform, Nanjing 210017, China; Fresh Water Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China. Electronic address: qichenjiang@foxmail.com
  • 6 Nanjing Normal University; Fresh Water Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China. Electronic address: tskwell@163.com
PMID: 39644864 DOI: 10.1016/j.cbd.2024.101369

Abstract

This study investigated the effects of short-term exposure to flavonoids, specifically quercetin and taxifolin, on the transcriptomic responses of Chinese sucker (Myxocyprinus asiaticus) to validate their influence on gene expression related to immunity, antioxidant activity, and metabolism. Using transcriptomic data, we also analyzed their influence on relevant immune genes and examined the Chinese suckers' resistance to A. hydrophila. Oxidative stress, immune defense, and glucose metabolism of Chinese suckers were tested to assess potential enhancements. Significant alterations were observed in multiple immune-related Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways in the liver of Chinese suckers, notably the complement and coagulation cascades, degradation of aromatic compounds, and xenobiotic metabolism by cytochrome P450. The key immune markers such as UGT, MPO, C3, and C4 were highlighted in these pathways, underlining their importance in fish immunity. Additionally, oxidative stress related KEGG pathways were notably influenced after exposure to quercetin and taxifolin, displaying markers such as CYP3A, superoxide dismutase, GST, malondialdehyde, and catalase. Quercetin particularly affected the enzymatic activity of glucose oxidase, hexokinase, phosphofructokinase, and ATPase, which are enzymes related to stress responses in fish. Antimicrobial tests revealed that both flavonoids enhanced Chinese suckers' defense against A. hydrophila by bolstering oxidative stress resistance and immunity. These results provided valuable insights for using flavonoids to enhance fish immunity.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.