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Shinyoung Jun 3 Articles
Interaction between vitamin E intake and a COMT gene variant on colorectal cancer risk: a case-control study
Shinyoung Jun, Madhawa Gunathilake, Jeonghee Lee, Jae Hwan Oh, Hee Jin Chang, Dae Kyung Sohn, Aesun Shin, Jeongseon Kim
Epidemiol Health. 2023;e2023100.   Published online November 14, 2023
DOI: https://doi.org/10.4178/epih.e2023100    [Accepted]
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  • 25 Download
AbstractAbstract PDF
Abstract
OBJECTIVES
Previous human trials have not supported the anticarcinogenic effect of vitamin E despite biological plausibility and considerable epidemiological evidence. A possible explanation for this inconsistency is the interactive effect of the catechol-O-methyltransferase (COMT) gene and supplemental vitamin E on cancer. We examined whether a COMT gene variant modulates the effect of dietary vitamin E intake on colorectal cancer (CRC) risk.
METHODS
In this case-control study of Korean adults (975 cases and 975 age- and sex-matched controls), dietary vitamin E density (mg/1,000 kcal) was measured using a semiquantitative food frequency questionnaire, COMT SNP rs740603 (A>G) was genotyped, and CRC was verified histologically. We estimated odds ratios (ORs) and 95% confidence intervals (CIs) using unconditional logistic regression models with adjustments for potential confounders.
RESULTS
Higher vitamin E density was associated with a lower risk of CRC (highest vs. lowest quartiles; OR, 0.72; 95% CI, 0.55 to 0.96; p-for-trend=0.0018). When stratified by COMT SNP rs740603 genotype, the inverse association between vitamin E density and CRC risk was confined to those with at least 1 A allele (≥median vs. <median; OR, 0.63; 95% CI, 0.51 to 0.78). The interaction between rs740603 and vitamin E density was significant (p-for-interaction=0.0204). No direct association was observed between COMT SNP rs740603 and CRC risk (OR, 0.92; 95% CI, 0.71 to 1.20).
CONCLUSIONS
Our findings support a role for a genetic polymorphism in COMT modifies the association between dietary vitamin E intake and CRC.
Summary
Dietary intake and cancer incidence in Korean adults: a systematic review and meta-analysis of observational studies
Ji Hyun Kim, Shinyoung Jun, Jeongseon Kim
Epidemiol Health. 2023;e2023102.   Published online November 30, 2023
DOI: https://doi.org/10.4178/epih.e2023102    [Accepted]
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  • 19 Download
AbstractAbstract PDF
Abstract
Cancer is a major health burden in Korea, and dietary factors have been suggested as putative risk factors for the development of cancers in diverse sites. This study systematically reviewed the published literature investigating the associations between dietary factors and cancer incidence among Korean adults following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. We focused on the five most studied cancer sites (stomach, colorectum, breast, thyroid, and cervix) as outcomes and dietary exposures with evidence levels greater than limited-suggestive according to the World Cancer Research Fund/American Institute for Cancer Research (WCRF/AICR) panel’s judgment in any of the cancer sites, resulting in 72 studies. Pooled estimates of dietary factors on cancer risk suggested protective associations of fruits and vegetables with risks of gastric cancer (GC), colorectal cancer (CRC), and breast cancer (BC) and dietary vitamin C with a risk of GC and a harmful association of fermented soy products with a risk of GC. Although the number of studies is limited, we observed consistent protective associations of dietary fiber with GC and dietary fiber, coffee, and calcium with CRC. These findings are largely consistent with the WCRF/AICR recommendations. However, pooled estimates for other salt-preserved foods with GC, meat with CRC, and dietary carotenoids and dairy products with BC did not reach statistical significance. Further studies with prospective study designs, larger sample sizes, and diverse types of dietary factors and cancer sites are necessary.
Summary
Association of the inflammatory balance of diet and lifestyle with colorectal cancer among Korean adults: a case-control study
Shinyoung Jun, Jeonghee Lee, Jae Hwan Oh, Hee Jin Chang, Dae Kyung Sohn, Aesun Shin, Jeongseon Kim
Epidemiol Health. 2022;44:e2022084.   Published online September 30, 2022
DOI: https://doi.org/10.4178/epih.e2022084
  • 2,872 View
  • 176 Download
  • 2 Citations
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
OBJECTIVES
Dietary and lifestyle exposures may affect the risk of colorectal cancer (CRC) by promoting chronic inflammation. Therefore, we assessed the separate and joint associations of dietary and lifestyle inflammation scores (DIS and LIS, respectively) with CRC.
METHODS
Data from 919 pathologically confirmed CRC cases and 1,846 age- and sex-matched controls recruited at the National Cancer Center Korea were analyzed. We calculated the DIS and LIS, which characterize the collective contributions of 19 dietary and 4 lifestyle factors, respectively, to systemic inflammation by applying weights based on high-sensitivity C-reactive protein. A higher score represented a higher balance of pro- to anti-inflammatory exposures. Unconditional logistic regression models were used to estimate odds ratios (ORs) and 95% confidence intervals (CIs) for CRC risk compared across the DIS and LIS tertile categories, with the lowest tertile as the reference group.
RESULTS
The highest DIS tertile had significantly increased odds of having CRC (OR, 2.65; 95% CI, 2.10 to 3.36), and the odds increased with increasing DIS. The highest LIS tertile group had 1.28-fold higher odds of having CRC (95% CI, 1.03 to 1.58). In the cross-classification analysis, the odds of having CRC increased as the DIS and LIS jointly increased until the DIS reached the highest tertile, where the risk was very high (3-fold or more) regardless of the LIS.
CONCLUSIONS
In conclusion, a higher balance of pro-inflammatory relative to anti-inflammatory dietary and lifestyle factors, especially dietary factors, was associated with higher CRC risk among Korean adults.
Summary
Korean summary
본 연구는 국립암센터에서 수집한 대장암 환자-대조군 데이터를 활용하여, 새롭게 개발된 식이 염증 지수(Dietary Inflammation Score, DIS) 및 생활습관 염증 지수(Lifestyle Inflammation Score, LIS)와 대장암 발생 위험 간의 연관성을 탐색하였다. 분석 결과, 식이 염증 지수 혹은 생활습관 염증 지수가 높은 집단에서 대장암 위험이 더 높아, 식이와 생활습관이 체내 염증 수준을 높여 대장암 발생 위험을 높일 가능성이 제기되었다
Key Message
Dietary inflammation score (DIS) and lifestyle inflammation score (LIS) quantify the collective effect of dietary and lifestyle factors, respectively, on systemic inflammation. In this case-control study, we assessed the associations of DIS and LIS with colorectal cancer risk among Korean adults. Our results suggest that a higher balance of pro-to anti-inflammatory dietary and lifestyle factors may be associated with higher risk for colorectal cancer. The findings from our study support that reducing inflammation through dietary or lifestyle changes could potentially reduce the risk for colorectal cancer.

Citations

Citations to this article as recorded by  
  • The association of diet-dependent acid load with colorectal cancer risk: a case–control study in Korea
    Tao Thi Tran, Madhawa Gunathilake, Jeonghee Lee, Jae Hwan Oh, Hee Jin Chang, Dae Kyung Sohn, Aesun Shin, Jeongseon Kim
    British Journal of Nutrition.2023; : 1.     CrossRef
  • Gout and Colorectal Cancer Likelihood: Insights from a Nested Case-Control Study of the Korean Population Utilizing the Korean National Health Insurance Service-National Sample Cohort
    Mi Jung Kwon, Kyeong Min Han, Joo-Hee Kim, Ji Hee Kim, Min-Jeong Kim, Nan Young Kim, Hyo Geun Choi, Ho Suk Kang
    Cancers.2023; 15(23): 5602.     CrossRef
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