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Smoking Can Damage Sperm DNA, Affects Fertility: Study Reveals
The sperms of men who smoke have a greater extent of DNA damage than that of non-smokers, says a new study that points out the harmful effects of smoking on male fertility.
Male infertility accounts for about 30% to 50% of all infertility cases, and infertile men tend to have high levels of damage in the sperm DNA.
"More and more studies are demonstrating a harmful effect of smoking on male fertility," said the senior author of the study, Ricardo Pimenta Bertolla from Sao Paulo Federal University in Brazil.
"Our results point in the direction of important semen alterations: Semen of smokers presents an inflammatory nature, associated with decreased capacity of sperm to achieve fertilisation and generate a healthy pregnancy," Pimenta Bertolla noted.
The study involved 20 non-smoking men and 20 men who smoked. Researchers also assessed 422 proteins in the participants' sperms. The analysis revealed that one protein was absent, 27 proteins were underrepresented, and six proteins were over-represented in smokers.
Analyses of these proteins suggest that cigarette smoking may promote an inflammatory response in the male reproductive tract.
"It is especially noteworthy that, in our study, sperm DNA fragmentation was increased. Other studies have proposed this to be a potentially promutagenic effect, which is to say that sperm with altered DNA may lead to health problems in the offspring," Pimenta Bertolla explained.
(Inputs from IANS)
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