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  1. Reactive oxygen species-induced alterations in H19-Igf2 methylation patterns, seminal plasma metabolites, and semen quality
    Darbandi M, Darbandi S, Agarwal A, Baskaran S, Dutta S, Sengupta P, et al.
    J Assist Reprod Genet, 2019 Feb;36(2):241-253.
    PMID: 30382470 DOI: 10.1007/s10815-018-1350-y
    PURPOSE: This study was conducted in order to investigate the effects of reactive oxygen species (ROS) levels on the seminal plasma (SP) metabolite milieu and sperm dysfunction.

    METHODS: Semen specimens of 151 normozoospermic men were analyzed for ROS by chemiluminescence and classified according to seminal ROS levels [in relative light units (RLU)/s/106 sperm]: group 1 (n = 39): low (ROS n = 38): mild (20 ≤ ROS n = 31): moderate (40 ≤ ROS n = 43): high (ROS ≥ 60). A comprehensive analysis of SP and semen parameters, including conventional semen characteristics, measurement of total antioxidant capacity (TAC), sperm DNA fragmentation index (DFI), chromatin maturation index (CMI), H19-Igf2 methylation status, and untargeted seminal metabolic profiling using nuclear magnetic resonance spectroscopy (1H-NMR), was carried out.

    RESULT(S): The methylation status of H19 and Igf2 was significantly different in specimens with high ROS (P N-oxide (P N-oxide (r = 0.45, P 

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