{"id":54296,"date":"2003-04-01T00:00:00","date_gmt":"2018-12-04T05:38:12","guid":{"rendered":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/resume-scientifique\/biomarkers-of-dietary-intake-of-micronutrients-modulate-dna\/"},"modified":"2018-12-04T06:38:12","modified_gmt":"2018-12-04T05:38:12","slug":"biomarkers-of-dietary-intake-of-micronutrients-modulate-dna","status":"publish","type":"resume","link":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/resume-scientifique\/biomarkers-of-dietary-intake-of-micronutrients-modulate-dna\/","title":{"rendered":"Biomarkers of dietary intake of micronutrients modulate dna adduct levels in healthy adults"},"content":{"rendered":"<p>DNA adducts, a reliable indicator of internal dose exposure to genotoxic agents and, possibly, of cancer risk, have been shown to be modulated by diet, particularly by the consumption of fresh fruit and vegetables, and by the intake of antioxidants (Palli et al., 2000, Int. J. Cancer, 87, 444-451). We have therefore investigated the association between DNA adducts in peripheral leukocytes and plasma levels of selected micronutrients, also taking into account the role of metabolic polymorphisms and smoking history, in a large independent random sample of volunteers enrolled in the prospective study <span class='tooltipsall tooltip_post_id_80438 classtoolTips80438'>EPIC<\/span>-Italy (similar to110 subjects from each of the three main geographical study areas, Northern, Central and Southern Italy). DNA adducts and five polymorphic metabolic genotypes were determined in peripheral leukocytes using the P-32-post-labelling technique and PCR methods. Plasma levels of six carotenoids, retinol and alpha- and gamma-tocopherol were determined in the same blood sample. Among 331 subjects, 78.3% had detectable levels of DNA adducts (mean 7.46 +\/- 0.48 per 10(9) nucleotides). Vitamin supplementation was reported by only a few subjects (3.9%). Strong inverse associations emerged between levels of DNA adducts and plasma retinol (P = 0.02), alpha-tocopherol (P = 0.04) and gamma-tocopherol (P = 0.03), but not carotenoids (except a borderline inverse association with beta-carotene, P = 0.08). An inverse significant association with plasma levels of retinol and gamma-tocopherol persisted in the subgroup of non-smokers, whereas a negative association with alpha-tocopherol emerged only in smokers. DNA adduct levels did not show any significant variation according to analyzed genotypes. Stratification by GSTM1 genotype, however, showed a significant negative association between DNA adduct levels and plasma levels of alpha- (P = 0.02) and beta-carotene (P = 0.02) in subjects with the GSTM1 null genotype. Our results confirm that biomarkers of dietary intake of antioxidants significantly modulate DNA adducts and suggest specific inverse associations between DNA adduct levels and antioxidant concentrations among GSTM1 null subjects and smokers.<\/p>\n","protected":false},"template":"","mots_cles":[],"class_list":["post-54296","resume","type-resume","status-publish","hentry"],"acf":{"adresse":"\"PALLI D,SCI INST TUSCANY,CSPO MOL BIOL LAB MOL & NUTR EPIDEMIOL UNIT; ITALY.d.palli@cspo.it  \"","annee":"2003","mois":"4","numero":"24:4","page":"739-746","auteurs":[{"ID":5399,"post_author":"0","post_date":"2018-12-03 17:27:24","post_date_gmt":"2018-12-03 16:27:24","post_content":"","post_title":"Vittorio Krogh","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"vittorio-krogh","to_ping":"","pinged":"","post_modified":"2018-12-03 17:27:24","post_modified_gmt":"2018-12-03 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02:15:29","post_content":"","post_title":"Peluso","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"peluso","to_ping":"","pinged":"","post_modified":"2018-12-04 03:15:29","post_modified_gmt":"2018-12-04 02:15:29","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/auteur\/peluso\/","menu_order":0,"post_type":"auteur_resume","post_mime_type":"","comment_count":"0","filter":"raw"},{"ID":39278,"post_author":"0","post_date":"2018-12-04 01:53:16","post_date_gmt":"2018-12-04 00:53:16","post_content":"","post_title":"Garten","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"garten","to_ping":"","pinged":"","post_modified":"2018-12-04 01:53:16","post_modified_gmt":"2018-12-04 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19:54:22","post_content":"","post_title":"CARCINOGENESIS","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"carcinogenesis","to_ping":"","pinged":"","post_modified":"2018-12-03 20:54:22","post_modified_gmt":"2018-12-03 19:54:22","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/source\/carcinogenesis\/","menu_order":0,"post_type":"source","post_mime_type":"","comment_count":"0","filter":"raw"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.6 (Yoast SEO v23.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Biomarkers of dietary intake of micronutrients modulate dna adduct levels in healthy adults - Aprifel<\/title>\n<meta name=\"description\" content=\"Biomarkers of dietary intake of micronutrients modulate dna adduct levels in healthy adults - Aprifel\" \/>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta 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