Prediagnostic Level of Dietary and Urinary Isoflavonoids in Relation to Risk of Liver Cancer in Shanghai, China.

Published on Oct 1, 2019in Cancer Epidemiology, Biomarkers & Prevention5.057
· DOI :10.1158/1055-9965.EPI-18-1075
Wei Zhang36
Estimated H-index: 36
(SJTU: Shanghai Jiao Tong University),
Jing Wang15
Estimated H-index: 15
(SJTU: Shanghai Jiao Tong University)
+ 7 AuthorsYong-Bing Xiang57
Estimated H-index: 57
(SJTU: Shanghai Jiao Tong University)
Background: No epidemiological studies have directly assessed the association between dietary and urinary of isoflavonoids and risk of liver cancer in humans. Methods: A nested case-control study including 217 incident cases of liver cancer and 427 individually matched control subjects was conducted in Shanghai, China. Dietary isoflavonoids intakes were assessed through a validated food-frequency questionnaire and the Chinese Food Composition Tables. Urinary excretion levels of four major isoflavonoids were measured by the reversed-phase high-performance liquid chromatography. Odds ratios (ORs) and 95% confidence intervals (CIs) were derived using conditional logistic regression models. Results: The adjusted ORs (95% CIs) for liver cancer across increasing quartiles of urinary genistein levels were 1.00 (reference), 0.55 (95% CI = 0.22 to 1.36), 0.57 (95% CI = 0.23 to1.43) and 0.19 (95% CI = 0.06 to 0.59) (P=0.008 for trend) in women and 1.00 (reference), 1.22(0.52,2.86), 1.17(0.47,2.90), 1.23 (0.55-2.76) in men, respectively. These associations were consistent by limiting the cases to primary malignant neoplasm of liver or malignant neoplasms of the intrahepatic bile ducts, or among participants without self-reported liver disease or cirrhosis at the baseline survey. No associations were found between dietary isoflavonoids and liver cancer risk. Conclusions: Our study suggests for the first time that urinary excretion of genistein may be associated with reduced risk of liver cancer in women. Impact: In this nested case-control study in China, we found that urinary excretion of genistein was associated with lower risk of liver cancer in women, and not in men.
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