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To date, lipid\u2010modifying factors, such as proprotein convertase subtilisin\/kexin type 9 (PCSK9), angiopoietin\u2010like 3 protein (ANGPTL3), and lipoprotein(a) or Lp(a), have not been reported in men with PCa. The present study aimed to verify whether plasma levels of these lipid\u2010related proteins vary in men with PCa compared to at\u2010risk but cancer\u2010free men.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Plasma samples from 35 men with locally advanced PCa Gleason 8 and 9 versus 35 men at risk of PCa were selected as cases and controls. Blood samples were paired according to age and BMI. Apolipoprotein B100 (Apo B), Lp(a), and lipid profiles were measured on an analytical platform (Roche Cobas). PCSK9 and ANGPTL3 levels were determined by ELISA.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>No significant change in lipids and related factors levels was observed between men with localized PCa Gleason 8 or 9 and matched controls. A correlation between ANGPTL3 and HDL levels was only confirmed in controls (\u03c1\u2009=\u20090.54, <jats:italic>p<\/jats:italic>\u2009=\u20090.0009). PCSK9 was inversely associated with PSA levels in the entire cohort (\u03c1\u2009=\u2009\u22120.31, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.01), suggesting that factors influencing PCSK9 could also influence PSA levels. In controls only, PSA levels were correlated with LDL, Apo B, non\u2010HDL, total cholesterol, and triglycerides (all \u03c1 coefficients \u2265\u20090.35, all <jats:italic>p<\/jats:italic>\u2010values &lt;\u20090.05). PCSK9 was correlated to LDL in PCa men, but the relationship was unexpectedly found to be inverse.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>In this observational study, lipid profiles, PCSK9, ANGPTL3, and Lp(a) levels did not change in men diagnosed with locally advanced Gleason 8 or 9 PCa compared to at\u2010risk but cancer\u2010free men. The present data suggest a complex interplay between PCSK9, PSA, and the lipid profile in localized PCa.<\/jats:p><\/jats:sec>","DOI":"10.1002\/cam4.70587","type":"journal-article","created":{"date-parts":[[2025,1,31]],"date-time":"2025-01-31T12:11:41Z","timestamp":1738325501000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Lipid Profile, <scp>PCSK9<\/scp>, <scp>ANGPTL3<\/scp> and Lipoprotein (a) Levels in Men Diagnosed With Localized High\u2010Grade Prostate Cancer and Men At\u2010Risk of Prostate Cancer"],"prefix":"10.1002","volume":"14","author":[{"given":"Ann\u2010Charlotte","family":"Bergeron","sequence":"first","affiliation":[{"name":"Oncology Research Axis, Centre de Recherche du CHU de Qu\u00e9bec\u2010Universit\u00e9 Laval  Quebec City Quebec 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