title: Gene-diet interactions in gastric cancer risk: a systematic review.
abstract: OBJECTIVE
  To conduct a systematic review of the published epidemiological studies investigating the association of the interactions between gene variants and dietary intake with gastric cancer risk.
  
  
  METHODS
  A literature search was conducted in PubMed, EMBASE, and MEDLINE for articles published between January 2000 and July 2013, and 38 studies were identified. Previous studies included various dietary factors (e.g., fruits and vegetables, soybean products, salt, meat, and alcohol) and genetic variants that are involved in various metabolic pathways.
  
  
  RESULTS
  Studies suggest that individuals who carry high-risk genetic variants and demonstrate particular dietary habits may have an increased risk of gastric cancer compared with those who do not carry high-risk genetic variants. Distinctive dietary patterns and variations in the frequency of genetic variants may explain the higher incidence of gastric cancer in a particular region. However, most previous studies have limitations, such as a small sample size and a retrospective case-control design. In addition, past studies have been unable to elucidate the specific mechanism in gene-diet interaction associated with gastric carcinogenesis.
  
  
  CONCLUSIONS
  Additional large prospective epidemiological and experimental studies are required to identify the gene-diet metabolic pathways related to gastric cancer susceptibility.
authors: Jeongseon Kim, Young Ae Cho, Wook Jin Choi, Seung Hwa Jeong, Molecular Epidemiology Branch, Division of Cancer Epidemiology and Prevention, Research Institute, National Cancer Center, Goyang-si 410-769, South Korea.
authors: Jeongseon
authors: J
authors: Kim
authors: Jeongseon Kim, Young Ae Cho, Wook Jin Choi, Seung Hwa Jeong, Molecular Epidemiology Branch, Division of Cancer Epidemiology and Prevention, Research Institute, National Cancer Center, Goyang-si 410-769, South Korea.
authors: Young Ae
authors: YA
authors: Cho
authors: Jeongseon Kim, Young Ae Cho, Wook Jin Choi, Seung Hwa Jeong, Molecular Epidemiology Branch, Division of Cancer Epidemiology and Prevention, Research Institute, National Cancer Center, Goyang-si 410-769, South Korea.
authors: Wook Jin
authors: WJ
authors: Choi
authors: Jeongseon Kim, Young Ae Cho, Wook Jin Choi, Seung Hwa Jeong, Molecular Epidemiology Branch, Division of Cancer Epidemiology and Prevention, Research Institute, National Cancer Center, Goyang-si 410-769, South Korea.
authors: Seung Hwa
authors: SH
authors: Jeong
mesh_terms: D004032:Diet / Q000009:adverse effects*; D005247:Feeding Behavior; D059647:Gene-Environment Interaction; D020022:Genetic Predisposition to Disease; D014644:Genetic Variation; D006801:Humans; D015994:Incidence; D008019:Life Style; D010641:Phenotype; D018570:Risk Assessment; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000453:epidemiology* / Q000235:genetics*
keywords: Diet; Gastric cancer; Gene; Interaction