4.7 Article

Human sperm proteome reveals the effect of environmental borne seminal polyaromatic hydrocarbons exposome in etiology of idiopathic male factor infertility

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Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fcell.2023.1117155

Keywords

idiopathic male infertility; polyaromatic hydrocarbon (PAHs); proteomics; oxidative stress; AhR signaling; protein nitrosylation

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This study aims to explore the correlation between seminal polyaromatic hydrocarbon (PAH) exposome and sperm function in idiopathic male infertility (IMI) patients through a proteomic approach. Results showed that 13 out of 16 toxic PAHs were detected in semen. The spermatozoa proteome was analyzed and validated, revealing the impact of PAHs on male infertility.
Introduction: Polyaromatic hydrocarbons (PAHs) are considered as redox active environmental toxicants inducing oxidative stress (OS) mediated injury to cells. Oxidative predominance is reported in 30%-80% of idiopathic male infertility (IMI) patients. Hence, this work aims to unravel correlation, if any, between seminal PAH exposome and sperm function in IMI patients through a proteomic approach. Methods: Seminal PAH exposome was analyzed in 43 fertile donors and 60 IMI patients by HPLC and receiver operating characteristic (ROC) curve was applied to find out the cut-off limits. Spermatozoa proteome was analyzed by label free liquid chromatography mass spectroscopy (LC-MS/MS) followed by molecular pathway analysis using bioinformatic tools. Validation of key proteins' expression and protein oxidative modifications were analyzed by western blot. Results and discussion: Of the 16 standards toxic PAH, 13 were detected in semen. Impact of the different PAHs on fertility are Anthracene < benzo (a) pyrene < benzo [b] fluoranthene < Fluoranthene < benzo (a) anthracene

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