Journal
AQUATIC TOXICOLOGY
Volume 243, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.aquatox.2021.106073
Keywords
Isoflucypram; SDHI; Zebrafish; Optical toxicity; Oxidative stress; Apoptosis
Categories
Funding
- Fundamental Research Funds for the Central Universities of Huaqiao University [ZQN-923]
- Wuhan Branch, Supercomputing Center, Chinese Academy of Sciences, China
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Isoflucypram has been found to have teratogenic effects on retinogenesis in zebrafish, causing abnormalities in retinal development and increased retinal cell apoptosis. This SDHI fungicide also demonstrates toxic effects on non-target aquatic organisms, highlighting the need for further investigation.
Isoflucypram is an active succinate dehydrogenase inhibitor (SDHI) fungicide. Recent studies have demonstrated that isoflucypram is toxic to non-target aquatic organisms such as zebrafish, Danio rerio. However, current knowledge of the potential risks presented by the SDHI to non-target aquatic organism remains limited. To investigate the teratogenic effects of isoflucypram on retinogenesis, zebrafish embryos were exposed to isoflucypram (0.025, 0.25, and 2.5 mu M) from the blastula stage (3 h post-fertilization, hpf) to the larval stage (96 hpf). Prolonged exposure to isoflucypram induced abnormalities in retinal development in zebrafish larvae, resulted in the expression of a microphthalmic phenotype, disrupted retinal lamination, and altered the expression levels of retinal markers (opn1sw1, opn1sw2, opn1mw1, opn1lw1, rho, atoh7, vsx1, prox1a, and sox2). Retinal cell apoptosis was also significantly higher in the isoflucypram-exposed larvae than in the control larvae. Catalase activity decreased significantly and malondialdehyde content increased markedly after exposure to isoflucypram. Thus, isoflucypram should be regarded as having retinal neumtoxicity in zebrafish.
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