title: The in vitro effect of duroquinone on functional competence, genomic integrity, and oxidative stress indices of sterlet (Acipenser ruthenus) spermatozoa.
abstract: The sturgeon is a highly endangered fish species mostly due to over-fishing, habitat destruction, and water pollution. Duroquinone (derivative of 1,4-benzoquinone) is a xenobiotic compound widespread in the environment. The effect of duroquinone on motility, DNA integrity, and oxidative stress indices in sterlet, Acispenser ruthenus, spermatozoa was investigated. Sterlet sperm was exposed for 2h to duroquinone at concentrations of 25, 50, 100, and 150 μM. Spermatozoa motility, velocity, and ATP content were significantly decreased with exposure to duroquinone. The level of DNA damage significantly increased at concentrations of 50 μM and above. Oxidative stress indices (lipid peroxidation and content of carbonyl proteins) and superoxide dismutase (SOD) activity increased significantly with increasing concentrations of duroquinone. Oxidative stress in sterlet spermatozoa induced by duroquinone was shown to impair spermatozoa DNA integrity, motility parameters, and the antioxidant defense system. Spermatozoa motility, content of carbonyl proteins, and SOD activity were shown to be sensitive biomarkers, exhibiting strong responses to low concentrations of the xenobiotic. Results also suggested that fish spermatozoa in vitro assays may provide a simple and efficient means of monitoring residual pollutants in the aquatic environment.
authors.affiliation: Faculty of Fisheries and Protection of Water, Research Institute of Fish Culture and Hydrobiology, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia, Vodnany, Czech Republic.
authors.forename: Pavla
authors.initials: P
authors.lastname: Linhartova
authors.forename: Ievgeniia
authors.initials: I
authors.lastname: Gazo
authors.forename: Anna
authors.initials: A
authors.lastname: Shaliutina
authors.forename: Martin
authors.initials: M
authors.lastname: Hulak
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D016227:Benzoquinones / Q000633:toxicity*; D004249:DNA Damage; D005399:Fishes / Q000502:physiology*; D008297:Male; D018384:Oxidative Stress / Q000187:drug effects; D013081:Sperm Motility / Q000187:drug effects; D013094:Spermatozoa / Q000187:drug effects* / Q000502:physiology; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D016227:Benzoquinones; D014874:Water Pollutants, Chemical; D000255:Adenosine Triphosphate; C034257:duroquinone
keywords: Comet assay; DNA damage; Reactive oxygen species; Spermatozoa motility; Sturgeon