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Abstract Title:

Plasma and dietary vitamin C levels and risk of gastric cancer in the European Prospective Investigation into Cancer and Nutrition (EPIC-EURGAST).

Abstract Source:

Carcinogenesis. 2006 Nov;27(11):2250-7. Epub 2006 Jun 14. PMID: 16774936

Abstract Author(s):

Mazda Jenab, Elio Riboli, Pietro Ferrari, Joan Sabate, Nadia Slimani, Teresa Norat, Marlin Friesen, Anne Tjønneland, Anja Olsen, Kim Overvad, Marie-Christine Boutron-Ruault, Françoise Clavel-Chapelon, Mathilde Touvier, Heiner Boeing, Mandy Schulz, Jakob Linseisen, Gabriele Nagel, Antonia Trichopoulou, Androniki Naska, Eleni Oikonomou, Vittorio Krogh, Salvatore Panico, Giovanna Masala, Carlotta Sacerdote, Rosario Tumino, Petra H Peeters, Mattijs E Numans, Hendrik B Bueno-de-Mesquita, Frederike L Büchner, Eiliv Lund, Guillem Pera, Carmen Navarro Sanchez, Maria-José Sánchez, Larraitz Arriola, Aurelio Barricarte, José Ramón Quirós, Göran Hallmans, Roger Stenling, Göran Berglund, Sheila Bingham, Kay-Tee Khaw, Timothy Key, Naomi Allen, Fatima Carneiro, U Mahlke, Guiseppe Del Giudice, Domenico Palli, Rudolf Kaaks, Carlos A Gonzalez

Abstract:

Vitamin C is an antioxidant and inhibitor of carcinogenic N-nitroso compound production in the stomach. Higher dietary vitamin C consumption is associated with decreased risk of gastric cancer (GC) in numerous case-control studies, but data from prospective studies are limited, particularly so for blood measures of vitamin C. The objective of this study was to determine the association of plasma and dietary vitamin C levels with the risk of GC in a case-control study nested within the European Prospective Investigation into Cancer and Nutrition (EPIC), a large cohort involving 10 European countries. Using a fluorometric method, vitamin C was measured in pre-diagnostic plasma from 215 GC cases (matched controls = 416). Conditional logistic regression models adjusted by body mass index, total energy intake, smoking status/duration/intensity and Helicobacter pylori infection status were used to estimate relative cancer risks. No association with GC risk was observed for dietary vitamin C, whereas an inverse GC risk was observed in the highest versus lowest quartile of plasma vitamin C [odds ratio (OR) = 0.55, 95% confidence interval (CI) = 0.31-0.97, P(trend) = 0.043], which was maintained after exclusion of cases with <or=2 years follow-up (OR = 0.40, 95% CI = 0.19-0.83, P(trend) = 0.064). The inverse association was more pronounced in subjects consuming higher levels of red and processed meats, a factor that may increase endogenous N-nitroso compound production. The effect of plasma vitamin C was not different by GC anatomical subsite (cardia/non-cardia) or histological subtype (diffuse/intestinal), and there was no significant interaction of effect with H.pylori. The results of this study show, in a prospective setting, an inverse association of GC risk with high levels of plasma vitamin C and suggest an interaction with the intake of red and processed meats, whose consumption may elevate endogenous N-nitroso compound production.

Study Type : Human Study

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Sayer Ji
Founder of GreenMedInfo.com

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