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- W2944743112 abstract "Abstract Background African‐American (AA) men tend to present with more aggressive prostate cancer (Gleason score >7) than European‐American (EA) men. Vitamin D and its metabolites are implicated in prostate cancer biology with vitamin D deficiency, indicated by its metabolite levels in serum or plasma, usually observed in AA men. Objective To determine if 1, 25‐dihydroxy vitamin D3 [1,25(OH) 2 D] plasma levels in AA and EA prostate cancer patients alter the risk of having aggressive prostate cancer. Design Research subjects from the North Carolina‐Louisiana Prostate Cancer Project (AA n = 435 and EA n = 532) were included. Plasma metabolites 1,25(OH) 2 D and 25‐hydroxyvitamin D3 [25(OH)D] were measured using liquid chromatography with tandem mass spectrophotometry. Research subjects were classified into low (Gleason sum < 7, stage T1‐T2, and Prostate‐specific antigen (PSA) < 9 ng/mL) or high (Gleason sum > 8 or Gleason sum = 7 with 4 + 3, or PSA > 20 ng/mL, or Gleason sum = 7 and stage T3‐T4) aggressive disease. Results Research subjects in the second and third tertiles of plasma levels of 1, 25(OH) 2 D had lower odds of high aggressive prostate cancer (AA [OR T2vsT1 : 0.66, 95%CI: 0.39‐1.12; OR T3vsT1 : 0.83, 95%CI: 0.49‐1.41] and EA [OR T2vsT1 : 0.68, 95%CI: 0.41‐1.11; OR T3vsT1 : 0.67, 95%CI: 0.40‐1.11]) compared with the first tertile, though confidence intervals included the null. Greater 1,25(OH) 2 D/25(OH)D molar ratios were associated with lower odds of high aggressive prostate cancer more evidently in AA (OR Q4vsQ1 : 0.45, CI: 0.24‐0.82) than in EA (OR Q4vsQ1 : 0.64, CI: 0.35‐1.17) research subjects. Conclusions The 1,25(OH) 2 D/25(OH)D molar ratio was associated with decreased risk of high aggressive prostate cancer in AA men, and possibly in EA men. Further studies analyzing vitamin D polymorphisms, vitamin D binding protein levels, and prostatic levels of these metabolites may be useful. These studies may provide a better understanding of the vitamin D pathway and its biological role underlying health disparities in prostate cancer." @default.
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- W2944743112 date "2019-05-11" @default.
- W2944743112 modified "2023-10-15" @default.
- W2944743112 title "Association among plasma 1,25(OH)<sub>2</sub>D, ratio of 1,25(OH)<sub>2</sub>D to 25(OH)D, and prostate cancer aggressiveness" @default.
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- W2944743112 doi "https://doi.org/10.1002/pros.23824" @default.
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