{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,22]],"date-time":"2025-12-22T10:56:56Z","timestamp":1766401016901,"version":"build-2065373602"},"reference-count":61,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2024,12,31]],"date-time":"2024-12-31T00:00:00Z","timestamp":1735603200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Fertility disorders are a worldwide problem affecting 8\u201312% of the population, with the male factor substantially contributing to about 40\u201350% of all infertility cases. Mitochondria, crucial organelles for cellular viability, play a pivotal role in the processes of spermatogenesis and significantly affect sperm quality and their fertilizing ability. Mitochondrial oxidative phosphorylation (OXPHOS) dysfunction, reduced energy supply for sperm, reduced endogenous coenzyme Q10 (CoQ10) levels, and oxidative stress are among the main factors that contribute to male infertility. There is great interest in the role of mitochondrial dysfunction in male infertility, and the diagnosis and assessment of mitochondrial health in infertile men present challenges. Platelets are a source of viable mitochondria that can be obtained non-invasively. Changes in platelet mitochondrial respiration were documented in various diseases, confirming platelet mitochondrial bioenergetics as a marker of systemic mitochondrial health. The aim of our study was to determine whether (a) platelet mitochondrial bioenergetics and CoQ10 levels could be used as metabolic markers of mitochondrial health in infertile men and whether (b) the parameters of mitochondrial respiration in platelets correlate with sperm parameters. The high-resolution respirometry method was used for platelet bioenergetics, and the high-performance liquid chromatography (HPLC) method was used for CoQ10 level measurement. The static oxidation\u2013reduction potential (sORP) of the ejaculate was evaluated by MiOXSYS\u00aeSystem. We found a deficit in mitochondrial complex I-linked OXPHOS and electron transfer capacity and CoQ10 and \u03b1-tocopherol levels in infertile men. The proportion of sperm, heads, and midpiece abnormalities correlated negatively with the complex I-linked parameters of platelet mitochondrial bioenergetics. We suppose that dysfunctional mitochondria contribute to increased oxidative stress, and these imbalances can be considered a cause of Male Oxidative Stress Infertility (MOSI). Our results suggest that platelet mitochondrial function and the endogenous levels of CoQ10 in platelets could be used as metabolic markers for monitoring mitochondrial health and targeted therapy in infertile men. sORP could be a useful clinical biomarker of MOSI.<\/jats:p>","DOI":"10.3390\/ijms26010268","type":"journal-article","created":{"date-parts":[[2024,12,31]],"date-time":"2024-12-31T10:17:40Z","timestamp":1735640260000},"page":"268","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Platelet Mitochondrial Function and Endogenous Coenzyme Q10 Levels Could Be Used as Markers of Mitochondrial Health in Infertile Men: A Pilot Study"],"prefix":"10.3390","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9454-6255","authenticated-orcid":false,"given":"Zuzana","family":"Sumbalov\u00e1","sequence":"first","affiliation":[{"name":"Institute of Medical Chemistry, Biochemistry and Clinical Biochemistry, Faculty of Medicine, Comenius University Bratislava, Sasinkova 2, 811 08 Bratislava, Slovakia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3651-3145","authenticated-orcid":false,"given":"Zuzana","family":"Rausov\u00e1","sequence":"additional","affiliation":[{"name":"Pharmacobiochemical Laboratory of 3rd Department of Internal Medicine, Faculty of Medicine, Comenius University Bratislava, Sasinkova 4, 811 08 Bratislava, Slovakia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jarmila","family":"Kucharsk\u00e1","sequence":"additional","affiliation":[{"name":"Pharmacobiochemical Laboratory of 3rd Department of Internal Medicine, Faculty of Medicine, Comenius University Bratislava, Sasinkova 4, 811 08 Bratislava, Slovakia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patrik","family":"\u0160ranko","sequence":"additional","affiliation":[{"name":"GYN-FIV, a.s., Trnavsk\u00e1 cesta 106, 821 01 Bratislava, Slovakia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter","family":"Harbul\u00e1k","sequence":"additional","affiliation":[{"name":"GYN-FIV, a.s., Trnavsk\u00e1 cesta 106, 821 01 Bratislava, Slovakia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pavel","family":"Svitok","sequence":"additional","affiliation":[{"name":"GYN-FIV, a.s., Trnavsk\u00e1 cesta 106, 821 01 Bratislava, Slovakia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9830-8502","authenticated-orcid":false,"given":"Guillermo","family":"L\u00f3pez-Lluch","sequence":"additional","affiliation":[{"name":"Department of Physiology, Anatomy and Cellular Biology, Pablo de Olavide University, 41013 Seville, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5139-9213","authenticated-orcid":false,"given":"Anna","family":"Gvozdj\u00e1kov\u00e1","sequence":"additional","affiliation":[{"name":"Faculty of Medicine, Slovak Medical University, Limbov\u00e1 12, 833 03 Bratislava, Slovakia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,12,31]]},"reference":[{"key":"ref_1","unstructured":"World Health Organization (2021). 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