Abstract

Male infertility is a risk factor for the development of testicular germ cell tumors. In this study, we investigated microRNA profiles in seminal plasma to identify potential noninvasive biomarkers able to discriminate the men at highest risk of developing cancer among the infertile population. We compared the microRNA profiles of individuals affected by testicular germ cell tumors and healthy individuals with normal or impaired spermiograms using high-throughput technology and confirmed the results by single-assay digital PCR. We found that miR-221-3p and miR-222-3p were downregulated and miR-126-3p was upregulated in cancer patients compared to both infertile and fertile men. ROC curve analysis confirmed that miR-126 upregulation is able to identify cancer patients among the infertile male population. In addition, in-depth bioinformatics analysis based on weighted gene co-expression networks showed that the identified miRNAs regulate cellular pathways involved in cancer.

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