in vitro effect of lead, silver, tin, mercury, indium and bismuth on human sperm creatine kinase activity: a presumable mechanism for men infertility
نویسندگان
چکیده
background: the aim of the present study was to investigate the in vitro effects of mercury (hg+2), lead (pb+2), silver (ag+2), tin (sn+2), bismuth (bi+3) and indium (in+3) ions on sperm creatine kinase. methods: creatine kinase was isolated from human sperm homogenates after chromatography on a deae cellulose column. results: at 60 µg ml-1 metal concentration, 70% of the creatine kinase activity was inhibited by hg+2, while at the same concentration, pb+2, ag+2, sn+2, bi+3 and in+3 caused 68%, 66.5%, 65.7%, 64.7% and 62.7% inhibition, respectively. all six metal ions displayed a competitive type of inhibition mechanism for the isolated creatine kinase as analyzed by lineweaver-burk plot. ki values of hg+2, pb+2, ag+2, sn+2, bi+3 and in+3 were calculated and 8.34 mm, 5 mm, 4.54 mm, 3.45 mm, 3.12 mm and 2.63 mm values were obtained, respectively. conclusion: all the studied metal ions, at levels of 60 µg ml-1, may reduce normal sperm metabolism by inhibition of sperm creatine kinase, which probably is an important cause of infertility in men. however, further investigations, as in vitro and in vivo, are needed to elucidate the exact mechanism of heavy metals on male reproductive functioning at the molecular level.
منابع مشابه
In vitro Effect of Lead, Silver, Tin, Mercury, Indium and Bismuth on Human Sperm Creatine Kinase Activity: a Presumable Mechanism for Men Infertility
Background: The aim of the present study was to investigate the in vitro effects of mercury (Hg+2), lead (Pb+2), silver (Ag+2), tin (Sn+2), bismuth (Bi+3) and indium (In+3) ions on sperm creatine kinase. Methods: creatine kinase was isolated from human sperm homogenates after chromatography on a DEAE cellulose column. Results: At 60 µg ml-1 metal concentration, 70% of the creatine kinase activi...
متن کاملIn vitro effect of lead, silver, tin, mercury, indium and bismuth on human sperm creatine kinase activity: a presumable mechanism for men infertility.
BACKGROUND The aim of the present study was to investigate the in vitro effects of mercury (Hg+2), lead (Pb+2), silver (Ag+2), tin (Sn+2), bismuth (Bi+3) and indium (In+3) ions on sperm creatine kinase. METHODS creatine kinase was isolated from human sperm homogenates after chromatography on a DEAE cellulose column. RESULTS At 60 mug ml-1 metal concentration, 70% of the creatine kinase acti...
متن کاملIn Vitro Inhibition of Human Sperm Creatine Kinase by Nicotine, Cotinine and Cadmium, as a Mechanism in Smoker Men Infertility
Background Nicotine, cotinine and cadmium are harmful components of cigarettes that have an effect on human reproductive function. Although the effects of cigarette smoke on male reproductive function is characterized in several articles its mechanism of action is still unknown. In the present study, we investigate the effect of nicotine, cotinine and cadmium on human sperm creatine kinase acti...
متن کاملin vitro inhibition of human sperm creatine kinase by nicotine, cotinine and cadmium, as a mechanism in smoker men infertility
background: nicotine, cotinine and cadmium are harmful components of cigarettes that have an effect on human reproductive function. although the effects of cigarette smoke on male reproductive function is characterized in several articles its mechanism of action is still unknown. in the present study, we investigate the effect of nicotine, cotinine and cadmium on human sperm creatine kinase act...
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عنوان ژورنال:
iranian biomedical journalجلد ۱۵، شماره ۱، صفحات ۳۸-۴۳
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