Ejaculate fractions of asthenozoospermic and teratozoospermic patients have differences in the sperm DNA integrity

摘要

The initial fraction of the human ejaculate mainly contains prostatic secretions and the subsequent fraction holds majority of the spermatozoa suspended in the secretions from the seminal vesicle. Apart from large series of proteins, human ejaculate also contains antioxidants and reactive oxygen species that are specific to certain accessory sexual glands; however, the influence of these components on the sperm DNA integrity has not been elucidated till date. The present investigation was conducted using split (first and second) ejaculate fractions of forty-one subjects having various semen abnormalities. Sperm DNA integrity was assessed in the individual fractions by comet assay and quantified. The amount of sperm DNA damage between the split fractions is not significantly different in normozoospermic semen samples. In contrast, split fraction-2 had significantly elevated level of DNA-damaged spermatozoa in asthenozoospermic (P?