| Influence of quercetin-rich food intake on microRNA expression in lung cancer tissues. | |
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MedLine Citation:
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PMID: 23035181 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: Epidemiologic studies have reported that frequent consumption of quercetin-rich foods is inversely associated with lung cancer incidence. A quercetin-rich diet might modulate microRNA (miR) expression; however, this mechanism has not been fully examined. METHODS: miR expression data were measured by a custom-made array in formalin-fixed paraffin-embedded tissue samples from 264 lung cancer cases (144 adenocarcinomas and 120 squamous cell carcinomas). Intake of quercetin-rich foods was derived from a food-frequency questionnaire. In individual-miR-based analyses, we compared the expression of miRs (n=198) between lung cancer cases consuming high-versus-low quercetin-rich food intake using multivariate ANOVA tests. In family-miR-based analyses, we used Functional Class Scoring (FCS) to assess differential effect on biologically functional miRs families. We accounted for multiple testing using 10,000 global permutations (significance at p-value(global) <0.10). All multivariate analyses were conducted separately by histology and by smoking status (former and current smokers). RESULTS: Family-based analyses showed that a quercetin-rich diet differentiated miR expression profiles of the tumor suppressor let-7 family among adenocarcinomas (p-value(FCS)<0.001). Other significantly differentiated miR families included carcinogenesis-related miR-146, miR-26, and miR-17 (p-values(FCS)<0.05). In individual-based analyses, we found that among former and current smokers with adenocarcinoma, 33 miRs were observed to be differentiated between highest-and-lowest quercetin-rich food consumers (23 expected by chance; p-value(global) = 0.047). CONCLUSIONS: We observed differential expression of key biologically functional miRNAs between high-versus-low consumers of quercetin-rich foods in adenocarcinoma cases. Impact: Our findings provide preliminary evidence on the mechanism underlying quercetin-related lung carcinogenesis. |
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Authors:
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Tram Kim Lam; Stephanie Shao; Yingdong Zhao; Francesco M Marincola; Angela C Pesatori; Pier Alberto Bertazzi; Neil E Caporaso; Ena Wang; Maria Teresa Landi |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-10-3 |
Journal Detail:
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Title: Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology Volume: - ISSN: 1538-7755 ISO Abbreviation: Cancer Epidemiol. Biomarkers Prev. Publication Date: 2012 Oct |
Date Detail:
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Created Date: 2012-10-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9200608 Medline TA: Cancer Epidemiol Biomarkers Prev Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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1Division of Cancer Epidemiology and Genetics, NIH/NCI. |
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