Oxidative damage induced by copper in testis of the red swamp crayfish Procambarus clarkii and its underlying mechanisms

We investigated the toxic effect of Cu on reproduction of the red swamp crayfish, an economic crustacean species, by exposing adult male crayfish to 0.03 and 3.00 mg/L Cu2+ for 7 days

Dan Zhao; Xiaona Zhang; Xuefu Li; Shaoguo Ru; Yanwen Wang; Jinbin Yin; Dasheng Liu

2018

Scholarcy highlights

  • Copper is one of the most widespread environmental pollutants and is known to exert multiple toxic effects including reproductive toxicity
  • We investigated the toxic effect of Cu on reproduction of the red swamp crayfish, an economic crustacean species, by exposing adult male crayfish to 0.03 and 3.00 mg/L Cu2+ for 7 days
  • The results showed that Cu2+ exposure induced oxidative stress accompanied by elevated reactive oxygen species and malondialdehyde levels in testes, and resulted in decreased sperm quality and abnormal testicular structures with apoptotic germ cells and vacuolisation in Sertoli cells
  • After the 3.00 mg/L Cu2+ treatment, 6745 genes with differentially expressed profile were identified, of which many genes were involved in cellular response to ROS based on Gene Ontology enrichment analysis
  • KEGG analysis demonstrated that genes with up-regulated expression levels significantly enriched in mitochondria oxidative phosphorylation pathway, suggesting disturbed mitochondrial electron transport chain was probably a main source of Cu2+-induced ROS production in testes
  • This study represented the first use of transcriptome to investigate the toxic effect of Cu2+ on male crayfish reproduction, and the pathways identified underlying Cu2+ toxicity at molecular level provide a novel insight into the reproductive toxicity of Cu in crustaceans

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