Abstract
Human semen contains spermatozoa as well as populations of round nonspermatozoal cells primarily consisting of leukocytes. Activation of white blood cells present in the seminal plasma during genital tract inflammation and cellular reactions against microbial agents may provoke a release of a variety of products such as cytokines and reactive oxygen species. The aim of this study was to evaluate whether a panel of selected cytokines (interleukin [IL]-1 beta, IL-6, IL-8, and tumor necrosis factor-alpha [TNF alpha]) detectable in seminal plasma during male genital tract inflammation could be considered as mediators between altered semen parameters and changed levels of pro-oxidant and antioxidant substances. Studies using chemiluminometric, spectrophotometric, and enzyme-linked immunosorbent assay methods indicate that proinflammatory cytokines such as IL-1 beta, IL-6, IL-8, and TNF alpha may modulate pro-oxidant and antioxidant activities in the male genital tract. The data also suggest that the function of pro-oxidant and antioxidant systems in semen may directly influence basic semen parameters. The elevated numbers of leukocytes present in semen during male genital tract inflammation without an associated contribution of cytokines and semen antioxidant capacity appear to be of little prognostic value in evaluating male fertilization potential.
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