scholarly journals Methylenetetrahydrofolate Reductase C677T Polymorphism and Risk of Colorectal Cancer in the Macedonian Population

2008 ◽  
Vol 11 (2) ◽  
pp. 17-24 ◽  
Author(s):  
N Matevska ◽  
T Josifovski ◽  
A Kapedanovska ◽  
Z Sterjev ◽  
Z Serafimoska ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Methylenetetrahydrofolate Reductase ◽  
Case Control Study ◽  
Age Of Onset ◽  
Case Control ◽  
Mthfr Gene ◽  
Inverse Association ◽  
C677t Polymorphism ◽  
677T Allele ◽  
Control Study

Methylenetetrahydrofolate Reductase C677T Polymorphism and Risk of Colorectal Cancer in the Macedonian PopulationMethylenetetrahydrofolate reductase (MTHFR) regulates the flow of folate groups between DNA synthesis and DNA methylation. A common C677T substitution (Ala222Val) in exon 4 of the MTHFR gene has been linked with the risk of colorectal cancer (CRC). To assess this risk in the Macedonian population, we conducted a case-control study of 413 randomly selected CRC patients and 185 controls without a clinical diagnosis of CRC. We found a statistically significant inverse association between the MTHFR T allele (35.35% for the patients and 41.35% for the controls) and the CRC risk [odds ratio (OR) 0.776; 95% confidence interval (95% CI) 0.603-0.997;p= 0.047). The prevalence of the MTHFR T allele is lower in patients with advanced CRC (Duke' s stage C and D) and with microsatellite instable tumors (MSI+), indicating the inverse association with the CRC aggressiveness and MSI status. This effect seems to be independent of gender, age of onset and localization. We concluded that the MTHFR 677T allele is more likely to have a protective effect on CRC development and progression in the Macedonian population.

scholarly journals Polymorphisms in the methylenetetrahydrofolate reductase (MTHFR) gene, intakes of folate and related B vitamins and colorectal cancer: a case–control study in a population with relatively low folate intake

2008 ◽  
Vol 99 (2) ◽  
pp. 379-389 ◽  
Author(s):  
Linda Sharp ◽  
Julian Little ◽  
Nigel T. Brockton ◽  
Seonaidh C. Cotton ◽  
Lindsey F. Masson ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Carbon Metabolism ◽  
Methylenetetrahydrofolate Reductase ◽  
Case Control Study ◽  
Case Control ◽  
B Vitamins ◽  
Folate Intake ◽  
Vitamin B ◽  
One Carbon Metabolism ◽  
Control Study

Folate is key in one-carbon metabolism, disruption of which can interfere with DNA synthesis, repair, and methylation. Efficient one-carbon metabolism requires other B vitamins and the optimal activity of enzymes including 5,10-methylenetetrahydrofolate reductase (MTHFR). We report a population-based case–control study of folate intake, related dietary factors andMTHFRpolymorphisms (C677T, A1298C) and colorectal cancer in a population with relatively high colorectal cancer incidence and relatively low folate intake. A total of 264 cases with histologically confirmed incident colorectal cancer and 408 controls participated. There was no clear trend in risk with reported intakes of total, or dietary, folate, riboflavin, vitamin B12or vitamin B6, nor were there interactions between folate intake and the other B vitamins or alcohol. For C677T, risk decreased with increasing variant alleles (multivariate OR for CTv.CC = 0·77 (95 % CI 0·52, 1·16); OR for TTv.CC = 0·62 (95 % CI 0·31, 1·24)), which, although not statistically significant, was consistent with previous studies. For A1298C, compared with AA subjects, CC subjects had modest, non-significant, reduced risk (multivariate OR = 0·81 (95 % CI 0·45, 1·49)). There were significant interactions between total folate and C677T (P = 0·029) and A1298C (P = 0·025), and total vitamin B6and both polymorphisms (C677T,P = 0·016; A1298C,P = 0·033), although the patterns observed differed from previous studies. Seen against the setting of low folate intake, the results suggest that the role of folate metabolism in colorectal cancer aetiology may be more complex than previously thought. Investigation of particular folate vitamers (for example, tetrahydrofolate, 5,10-methylenetetrahydrofolate) may help clarify carcinogenesis pathways.

scholarly journals Methylenetetrahydrofolate reductase C677T gene polymorphism and colorectal cancer risk: A case-control study

2012 ◽  
Vol 4 (2) ◽  
pp. 365-369 ◽  
Author(s):  
GUANCHENG YIN ◽  
HANXIN MING ◽  
XIAO ZHENG ◽  
YI XUAN ◽  
JIANWEI LIANG ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Cancer Risk ◽  
Gene Polymorphism ◽  
Methylenetetrahydrofolate Reductase ◽  
Case Control Study ◽  
Case Control ◽  
Colorectal Cancer Risk ◽  
Control Study

scholarly journals Solanaceous Vegetables and Colorectal Cancer Risk: A Hospital-Based Matched Case-Control Study in Northeast China

2021 ◽  
Vol 8 ◽  
Author(s):  
Yang Liu ◽  
Simin Li ◽  
Liqing Jiang ◽  
Yuchong Zhang ◽  
Zhi Li ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Cancer Risk ◽  
Northeast China ◽  
Case Control Study ◽  
Conditional Logistic Regression ◽  
Case Control ◽  
Dietary Factors ◽  
Colorectal Cancer Risk ◽  
Inverse Association ◽  
Control Study

Background: Dietary factors are regarded as an essential influence in changing colorectal cancer (CRC) risk. However, there is no clear conclusion of the relationship between solanaceous vegetables and colorectal cancer at present. The study aimed to evaluate the intake of solanaceous vegetables in relation to colorectal cancer risk among the Northeast Chinese population.Methods: We carried out a hospital-based case-control study in three hospitals in Northeast China from 2009 to 2011. The study finally included 833 patients with CRC and 833 controls matched separately according to age, gender, and city of residence. We applied a structural questionnaire to collect demographic characteristics and dietary information by face-to-face interview and adopted conditional logistic regression to calculate odds ratios (ORs) and 95% confidence intervals (CIs). Stratified analyses were conducted by sex and subsites.Results: There was no obvious correlation between total intake of solanaceous plants and CRC risk. The adjusted OR for the highest quartile and the lowest quartile was 1 (95% CI: 0.68–1.5). Certain types of solanaceous vegetables were negatively associated with the risk of CRC, such as eggplant (OR = 0.42; 95% CI:0.29–0.62) and sweet pepper (OR = 0.48; 95%CI: 0.33–0.7). Potato was found to have a positive correlation with CRC (OR = 1.76; 95% CI: 1.26–2.47). In the stratified analyses by gender, total solanaceous vegetables intake was inversely associated with CRC risk only in men. In the stratified analyses of cancer subsites, no significant association between total solanaceous vegetables intake and CRC risk was found.Conclusion: No findings showed that the intake of total solanaceous vegetables was related to the reduction of CRC risk. However, specific types of solanaceous vegetables indicated an inverse association with CRC risk.

scholarly journals Association between phytosterol intake and colorectal cancer risk: a case–control study

2017 ◽  
Vol 117 (6) ◽  
pp. 839-850 ◽  
Author(s):  
Jing Huang ◽  
Ming Xu ◽  
Yu-Jing Fang ◽  
Min-Shan Lu ◽  
Zhi-Zhong Pan ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Cancer Risk ◽  
Chinese Population ◽  
Case Control Study ◽  
Positive Association ◽  
Case Control ◽  
Colorectal Cancer Risk ◽  
Inverse Association ◽  
Increased Risk ◽  
Control Study

AbstractA study in rodent models showed that phytosterols protected against colon carcinogenesis, probably by inhibiting dysregulated cell cycle progression and inducing cellular apoptosis. However, epidemiological studies on the relationship between phytosterols and colorectal cancer risk are quite limited. The aim of this study was to investigate dietary phytosterol intake in relation to colorectal cancer risk in the Chinese population. A case–control study was conducted from July 2010 to June 2016, recruiting 1802 eligible colorectal cancer cases plus 1813 age (5-year interval) and sex frequency-matched controls. Dietary information was collected by using a validated FFQ. The OR and 95 % CI of colorectal cancer risk were assessed by multivariable logistic regression models. A higher total intake of phytosterols was found to be associated with a 50 % reduction in colorectal cancer risk. After adjusting for various confounders, the OR of the highest quartile intake compared with the lowest quartile intake was 0·50 (95 % CI 0·41, 0·61, Ptrend<0·01) for total phytosterols. An inverse association was also found between the consumption of β-sitosterol, campesterol, campestanol and colorectal cancer risk. However, stigmasterol intake was related to an increased risk of colorectal cancer. No statistically significant association was found between β-sitostanol and colorectal cancer risk. Stratified analysis by sex showed that the positive association of stigmasterol intake with colorectal cancer risk was found only in women. These data indicated that the consumption of total phytosterols, β-sitosterol, campesterol and campestanol is inversely associated with colorectal cancer risk in a Chinese population.

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