In Silico Sperm Proteome Analysis to Investigate DNA Repair Mechanisms in Varicocele Patients

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dc.contributor.authorHenkel, Ralf
dc.contributor.authorFinelli, R
dc.contributor.authorDarbandi, S
dc.contributor.authorPushparaj, P. N.
dc.contributor.authorKo, E.
dc.contributor.authorAgarwal, A.
dc.date.accessioned2022-03-10T07:24:37Z
dc.date.available2022-03-10T07:24:37Z
dc.date.issued2021-12-17
dc.descriptionThis study was supported by the American Center for Reproductive Medicine, Cleveland Clinic, Cleveland, Ohio, USA.en_US
dc.description.abstractVaricocele, a condition associated with increased oxidative stress, negatively affects sperm DNA integrity and reduces pregnancy rates. However, the molecular mechanisms related to DNA integrity, damage, and repair in varicocele patients remain unclear. This study aimed to determine the role of DNA repair molecular mechanisms in varicocele-related infertility by combining an in silico proteomics approach with wet-laboratory techniques. Proteomics results previously generated from varicocele patients (n=50) and fertile controls (n=10) attending our Andrology Center were reanalyzed using bioinformatics tools, including the WEB-based Gene SeT AnaLysis Toolkit, Open Target Platform, and Ingenuity Pathway Analysis (IPA), to identify differentially expressed proteins (DEPs) involved in DNA repair. Subsequently, selected DEPs in spermatozoa were validated using western blotting in varicocele (n = 13) and fertile control (n = 5) samples. We identified 99 DEPs mainly involved in male reproductive system disease (n=66) and male infertility (n=47). IPA analysis identified five proteins [fatty acid synthase (FASN), myeloperoxidase (MPO), mitochondrial aconitate hydratase (ACO2), nucleoporin 93 (NUP93), and 26S proteasome non-ATPase regulatory subunit 14 (PSMD14)] associated with DNA repair deficiency, which showed altered expression in varicocele (P <0.03). We validated ACO2 downregulation (fold change=0.37, change%=-62.7%, P=0.0001) and FASN overexpression (fold change = 4.04, change %= 303.7%, P = 0.014) in men with varicocele compared to controls. This study combined a unique in silico approach with an in vitro validation of the molecular mechanisms that may be responsible for varicocele-associated infertility. We identified ACO2 and FASN as possible proteins involved in DNA repair, whose altered expression may contribute to DNA damage in varicocele pathophysiology. Copyright © 2021en_US
dc.description.sponsorshipAmerican Center for Reproductive Medicine, Cleveland Clinicen_US
dc.identifier.citationFinelli, Renata, et al. “In Silico Sperm Proteome Analysis to Investigate DNA Repair Mechanisms in Varicocele Patients.” Frontiers in Endocrinology (Lausanne), vol. 12, Frontiers Media S.A, 2021, pp. 757592–757592, https://doi.org/10.3389/fendo.2021.757592.en_US
dc.identifier.issn16642392
dc.identifier.uri10.3389/fendo.2021.757592
dc.identifier.urihttp://hdl.handle.net/10566/7306
dc.language.isoenen_US
dc.publisherFrontiers Media S.A.en_US
dc.relation.ispartofseriesFrontiers in endocronology;Article Number 757592
dc.subjectDNA damageen_US
dc.subjectDNA repairen_US
dc.subjectMale infertilityen_US
dc.subjectProteomicsen_US
dc.subjectVaricoceleen_US
dc.subjectSperm Concentrationen_US
dc.subjectSpermatozoaen_US
dc.titleIn Silico Sperm Proteome Analysis to Investigate DNA Repair Mechanisms in Varicocele Patientsen_US
dc.typeArticleen_US

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