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International Journal of Reproductive BioMedicine
Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences of Yazd
ISSN: 1680-6433
EISSN: 2008-2177
Vol. 2, No. 1, 2004, pp. 34-39
Bioline Code: rm04008
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Reproductive BioMedicine, Vol. 2, No. 1, 2004, pp. 34-39

 en Evaluation of Lipid Peroxidation as an Indirect Measure of Oxidative Stress in Seminal Plasma
Zarghami, Nosratollah & Khosrowbeygi, Ali


Background: It has been proposed that oxidative stress plays an important role in male infertility. The aims of this study were to compare seminal plasma levels of 15-F2t-isoprostane (8-iso-PGF2α), malondialdehyde (MDA), and total (sum of free and bound) homocysteine (tHcy) in normozoospermic vs. asthenozoospermic men, and to examine the relationships between tHcy and lipid peroxidation products.
Materials and Methods: The study was a case-control study with a simple random sampling. The case group consisted of 15 asthenozoospermic males. This group was compared with 15 normozoospermic men. Seminal plasma levels of 15-F2t-isoprostane and tHcy were measured using commercially available enzyme immunoassay (EIA) kits. MDA levels were determined by the thiobarbituric acid (TBA) assay. The Mann-Whitney U test was used to compare two groups. Coefficients of correlation were calculated using Spearman's correlation analysis. All hypothesis tests were two-tailed with statistical significance assessed at the p value < 0.05 level.
Results: MDA levels were lower in asthenozoospermic subjects than in control subjects (0.72±0.06 µM vs. 0.40±0.06 µM; p<0.05). No differences were seen in 15-F2t-isoprostane levels in asthenozoospermic subjects and controls (65.00±3.20 pg/ml vs. 58.17±4.12 pg/ml; p>0.05). Interestingly, tHcy levels were slightly higher in asthenozoospermic subjects than in controls (6.18±1.17 µM vs. 4.8±0.52µM). Sperm motility was inversely correlated with seminal plasma 15-F2t-isoprostane and MDA levels, respectively (p<0.05).
Conclusion: Seminal plasma levels of 15-F2t-isoprostane and tHcy showed no significant differences between normozoospermic and asthenozoospermic men. Sperm motility correlated inversely with seminal plasma levels of 15-F2t-isoprostane and MDA. No relationship was found between tHcy and lipid peroxidation. However, higher sample size is required to confirm these findings.

Seminal Plasma, 15-F2t-Isoprostane, Malondialdehyde, Homocysteine, Lipid Peroxidation, Asthenozoospermia, Normozoospermia

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