title: Evaluating the function of calcium antagonist on the Cd-induced stress in sperm of Russian sturgeon, Acipenser gueldenstaedtii.
abstract: In the current study, the sperm of Russian sturgeon (Acipenser gueldenstaedtii) was used to evaluate the roles of Verapamil (VRP), a calcium channel blocker, against cadmium (Cd)-induced stress. Sturgeon sperm were exposed for 2h at 50μg/L VRP, 5.0μg/L Cd, the mixture of 50μg/L VRP+5.0μg/L Cd, 50μg/L Cd and the mixture of 50μg/L VRP+50μg/L Cd. After exposure, the sperm motility parameters (motility and velocity), oxidative stress levels (lipid peroxidation [LPO] and carbonyl protein [CP]) and antioxidant enzyme activities (superoxide dismutase [SOD], glutathione reductase [GR], glutathione peroxidase [GPx]) were measured in sturgeon sperm. Compared to the control, Cd-induced stress was apparent as reflected by depressed motility parameters, induced oxidative stress and inhibited antioxidant enzyme activities at both Cd concentrations. In the presence of VRP, Cd-induced stress was reduced in sturgeon sperm, especially all the measured parameters in the sperm exposed at 5.0μg/L Cd returned to control levels, expect for the sperm motility. The present results indicate that VRP can reduce the Cd-induced stress in sturgeon sperm and suggest that using of sperm in vitro assays may provide a novel and efficient means for evaluating the effects of residual metals in the aquatic environment of sturgeon.
authors.affiliation: University of South Bohemia in Ceske Budejovice, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Vodnany, Czech Republic. zhihuali06@yahoo.com
authors.forename: Zhi-Hua
authors.initials: ZH
authors.lastname: Li
authors.forename: Ping
authors.initials: P
authors.lastname: Li
authors.forename: Marek
authors.initials: M
authors.lastname: Rodina
authors.forename: Tomas
authors.initials: T
authors.lastname: Randak
mesh_terms: D000818:Animals; D002104:Cadmium / Q000633:toxicity*; D002121:Calcium Channel Blockers / Q000494:pharmacology*; D005399:Fishes / Q000378:metabolism / Q000502:physiology*; D005979:Glutathione Peroxidase / Q000378:metabolism; D005980:Glutathione Reductase / Q000378:metabolism; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D018384:Oxidative Stress; D013094:Spermatozoa / Q000187:drug effects* / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism; D014700:Verapamil / Q000494:pharmacology*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D002121:Calcium Channel Blockers; D014874:Water Pollutants, Chemical; D002104:Cadmium; D014700:Verapamil; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005980:Glutathione Reductase