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Al-Shaheri FN, Al-Shami KM, Gamal EH, Mahasneh AA, Ayoub NM. Association of DNA repair gene polymorphisms with colorectal cancer risk and treatment outcomes. Exp Mol Pathol 2019; 113:104364. [PMID: 31881200 DOI: 10.1016/j.yexmp.2019.104364] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/16/2019] [Accepted: 12/24/2019] [Indexed: 02/07/2023]
Abstract
Colorectal cancer (CRC) is the third most common carcinoma worldwide. Despite the progress in screening and treatment, CRC remains a leading cause of cancer-related mortality. Alterations to normal nucleic acid processing may drive neoplastic transformation of colorectal epithelium. DNA repair machinery performs an essential function in the protection of genome by reducing the number of genetic polymorphisms/variations that may drive carcinogenicity. Four essential DNA repair systems are known which include nucleotide excision repair (NER), base excision repair (BER), mismatch repair (MMR), and double-strand break repair (DSBR). Polymorphisms of DNA repair genes have been shown to influence the risk of cancer development as well as outcomes of treatment. Several studies demonstrated the association between genetic polymorphism of DNA repair genes and increased risk of CRC in different populations. In this review, we have summarized the impact of DNA repair gene polymorphisms on risk of CRC development and treatment outcomes. Advancements of the current understanding for the impact of DNA repair gene polymorphisms on the risk and treatment of CRC may support diagnostic and predictive roles in patients with CRC.
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Affiliation(s)
- Fawaz N Al-Shaheri
- Division of Functional Genome Analysis, German Cancer Research Center (DKFZ), ImNeuenheimer Feld 580, 69120 Heidelberg, Germany; Medical Faculty Heidelberg, University of Heidelberg, ImNeuenheimer Feld 672, 69120 Heidelberg, Germany; Faculty of Applied Medical Sciences, Department of Medical Laboratory Sciences, Jordan University of Science and Technology, Irbid, Jordan.
| | - Kamal M Al-Shami
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, 720 South Donahue Drive, Auburn, Alabama 36849, United States of America; Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid 22110, Jordan.
| | - Eshrak H Gamal
- Department of Oncology, Collage of Medicine, Bonn University, Germany; Faculty of Applied Medical Sciences, Department of Medical Laboratory Sciences, Jordan University of Science and Technology, Irbid, Jordan.
| | - Amjad A Mahasneh
- Department of Applied Biological Sciences, Faculty of Science and Arts, Jordan University of Science and Technology, Irbid 22110, Jordan.
| | - Nehad M Ayoub
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid 22110, Jordan.
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Aoyama N, Kawado M, Yamada H, Hashimoto S, Suzuki K, Wakai K, Suzuki S, Watanabe Y, Tamakoshi A. Low intake of vegetables and fruits and risk of colorectal cancer: the Japan Collaborative Cohort Study. J Epidemiol 2014; 24:353-60. [PMID: 24857954 PMCID: PMC4150005 DOI: 10.2188/jea.je20130195] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background The evidence for an association between low intake of vegetables and fruits and increased colorectal cancer risk is inconclusive. Evaluating the colorectal cancer risk associated with continued low intake is important. Methods We used data of 45 516 and 14 549 subjects aged 40–79 years obtained in the baseline and interim surveys, respectively, from the Japan Collaborative Cohort Study for Evaluation of Cancer Risk (JACC Study). The intake frequency of vegetables and fruits as assessed by a self-administered questionnaire was classified into tertiles of low, middle, and high groups, and the low group was subdivided into 2 equal groups (lower low and higher low groups). Colorectal cancer incidence determined from follow-up was used. Cox’s proportional hazard model was employed to estimate the hazard ratios (HRs) and 95% confidence intervals (CIs), adjusting for covariates. Results During 598 605 person-years of subject follow-up after baseline, we identified 806 colorectal cancer cases. HRs for the lower low versus the middle and high intake frequencies of vegetables and fruits at baseline were 0.95 (95% CI 0.77–1.16) and 1.08 (95% CI 0.90–1.29), respectively. During 125 980 person-years of subject follow-up after the interim survey, 197 colorectal cancer cases were identified. HRs for the low versus middle and high intake frequencies of vegetables and fruits in both baseline and interim surveys were 0.91 (95% CI 0.61–1.37) and 0.87 (95% CI 0.59–1.27), respectively. Conclusions Our results suggest that low intake and continued low intake of vegetables and fruits are not strongly associated with colorectal cancer risk.
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Affiliation(s)
- Norihiro Aoyama
- Department of Hygiene, Fujita Health University School of Medicine
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Cook LS, Nelson HE, Stidley CA, Dong Y, Round PJ, Amankwah EK, Magliocco AM, Friedenreich CM. Endometrial cancer and a family history of cancer. Gynecol Oncol 2013; 130:334-9. [PMID: 23632205 PMCID: PMC4052607 DOI: 10.1016/j.ygyno.2013.04.053] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 04/04/2013] [Accepted: 04/20/2013] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Lynch Syndrome (LS), an inherited genetic syndrome, predisposes to cancers such as colorectal and endometrial. However, the risk for endometrial cancer (EC) in women not affected by LS, but with a family history of cancer, is currently unknown. We examined the association between a family history of cancer and the risk for EC in non-LS patients. METHODS This population-based case-control study included 519 EC cases and 1015 age-matched controls and took place in Alberta, Canada between 2002 and 2006. Information about risk factors, including family history of cancer in first and second degree relatives, was ascertained via in-person interviews. Microsatellite instability (MSI) status of tumor tissue was assessed to determine involvement of DNA mismatch repair (MMR) genes. RESULTS A first or second degree family history of uterine cancer was modestly associated with the risk for overall EC [odds ratio (OR), 1.3; 95% confidence interval (CI), 0.9, 1.9], and the risks were similar for MSI+cancer (OR=1.5, 95%CI=0.7, 3.3) and MSI- cancer (OR=1.3, 95%CI=0.8, 2.4). Although consistent, these associations were modest and not significant. In contrast, the risk for MSI+cancer was elevated with a reported family history of colorectal cancer (OR=1.4, 95%CI=1.0, 2.2), but not for MSI- cancer. CONCLUSIONS A family history of uterine cancer may be modestly associated with EC risk in non-LS patients regardless of MSI status, suggesting that risk was not related to inherited defects in the MMR gene pathway. These results provide preliminary support for an EC-specific genetic syndrome.
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Affiliation(s)
- Linda S Cook
- Epidemiology and Biostatistics, Department of Internal Medicine, NM Health Sciences Center, University of New Mexico, MSC 10 5550, 1 University of New Mexico, Albuquerque, NM 87131-0001, USA.
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Cortessis VK, Thomas DC, Levine AJ, Breton CV, Mack TM, Siegmund KD, Haile RW, Laird PW. Environmental epigenetics: prospects for studying epigenetic mediation of exposure-response relationships. Hum Genet 2012; 131:1565-89. [PMID: 22740325 PMCID: PMC3432200 DOI: 10.1007/s00439-012-1189-8] [Citation(s) in RCA: 194] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Accepted: 06/07/2012] [Indexed: 12/15/2022]
Abstract
Changes in epigenetic marks such as DNA methylation and histone acetylation are associated with a broad range of disease traits, including cancer, asthma, metabolic disorders, and various reproductive conditions. It seems plausible that changes in epigenetic state may be induced by environmental exposures such as malnutrition, tobacco smoke, air pollutants, metals, organic chemicals, other sources of oxidative stress, and the microbiome, particularly if the exposure occurs during key periods of development. Thus, epigenetic changes could represent an important pathway by which environmental factors influence disease risks, both within individuals and across generations. We discuss some of the challenges in studying epigenetic mediation of pathogenesis and describe some unique opportunities for exploring these phenomena.
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Affiliation(s)
- Victoria K. Cortessis
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, USC Norris Comprehensive Cancer Center, 1441 Eastlake Avenue, Los Angeles, CA 90089 USA
| | - Duncan C. Thomas
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, 2001 N. Soto St., SSB-202F, Los Angeles, CA 90089-9234 USA
| | - A. Joan Levine
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, USC Norris Comprehensive Cancer Center, 1441 Eastlake Avenue, Los Angeles, CA 90089 USA
| | - Carrie V. Breton
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, 2001 N. Soto St., Los Angeles, CA 90089-9234 USA
| | - Thomas M. Mack
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, USC Norris Comprehensive Cancer Center, 1441 Eastlake Avenue, Los Angeles, CA 90089 USA
| | - Kimberly D. Siegmund
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, 2001 N. Soto St., Los Angeles, CA 90089-9234 USA
| | - Robert W. Haile
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, USC Norris Comprehensive Cancer Center, 1441 Eastlake Avenue, Los Angeles, CA 90089 USA
| | - Peter W. Laird
- Departments of Surgery, Biochemistry and Molecular Biology, Keck School of Medicine, University of Southern California, USC Norris Comprehensive Cancer Center, Epigenome Center, 1441 Eastlake Avenue, Los Angeles, CA 90089-9601 USA
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Hansen L, Skeie G, Landberg R, Lund E, Palmqvist R, Johansson I, Dragsted LO, Egeberg R, Johnsen NF, Christensen J, Overvad K, Tjønneland A, Olsen A. Intake of dietary fiber, especially from cereal foods, is associated with lower incidence of colon cancer in the HELGA cohort. Int J Cancer 2011; 131:469-78. [DOI: 10.1002/ijc.26381] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Accepted: 07/05/2011] [Indexed: 02/06/2023]
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Gay LJ, Arends MJ, Mitrou PN, Bowman R, Ibrahim AE, Happerfield L, Luben R, McTaggart A, Ball RY, Rodwell SA. MLH1 promoter methylation, diet, and lifestyle factors in mismatch repair deficient colorectal cancer patients from EPIC-Norfolk. Nutr Cancer 2011; 63:1000-10. [PMID: 21875327 DOI: 10.1080/01635581.2011.596987] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
There is conflicting evidence for the role diet and lifestyle play in the development of mismatch repair (MMR)-deficient colorectal cancers (CRC). In this study, associations between MMR deficiency, clinicopathological characteristics, and dietary and lifestyle factors in sporadic CRC were investigated. Tumor samples from 185 individuals in the EPIC-Norfolk study were analyzed for MLH1 gene promoter methylation and microsatellite instability (MSI). Dietary and lifestyle data were collected prospectively using 7-day food diaries (7dd) and questionnaires. MMR-deficient tumor cases (MLH1 promoter methylation positive, MSI-H) were more likely to be female, older at diagnosis, early Dukes' stage (A/B), and proximal in location (MSI-H P = 0.03, 0.03, 0.02, and 0.001, respectively). Tumors with positive MLH1 promoter methylation (>20%) were associated with poor differentiation (P = 0.03). Low physical activity was associated with cases without MSI (P = 0.05). MMR deficiency was not significantly associated with cigarette smoking or alcohol, folate, fruit, vegetable, or meat consumption. We conclude that MMR-deficient tumors represent a distinct subset of sporadic CRC that are proximal in location, early Dukes' stage, and poorly differentiated, in cases that are female and older at diagnosis. There is no overall role for diet and lifestyle in MMR status in CRC, consistent with age-related susceptibility to MLH1 promoter methylation.
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Affiliation(s)
- Laura J Gay
- Medical Research Council Dunn Human Nutrition Unit, Cambridge, United Kingdom
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Simmen FA, Frank JA, Wu X, Xiao R, Hennings LJ, Prior RL. Lack of efficacy of blueberry in nutritional prevention of azoxymethane-initiated cancers of rat small intestine and colon. BMC Gastroenterol 2009; 9:67. [PMID: 19758446 PMCID: PMC2752457 DOI: 10.1186/1471-230x-9-67] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2009] [Accepted: 09/16/2009] [Indexed: 02/08/2023] Open
Abstract
Background Blueberries may lower relative risk for cancers of the gastrointestinal tract. Previous work indicated an inhibitory effect of consumed blueberry (BB) on formation of aberrant crypt foci (ACF) in colons of male Fisher F344 rats (inbred strain). However, effects of BB on colon tumors and in both genders are unknown. Methods We examined efficacy of BB in inhibition of azoxymethane (AOM)-induced colon ACF and intestine tumors in male and female Sprague-Dawley rats (outbred strain). Pregnant rats were fed a diet with or without 10% BB powder; progeny were weaned to the same diet as their dam and received AOM as young adults. Results Male and female rats on control diet had similar numbers of ACF at 6 weeks after AOM administration. BB increased (P < 0.05) ACF numbers within the distal colon of female but not male rats. There was a significant (P < 0.05) diet by gender interaction with respect to total colon ACF number. Colon and duodenum tumor incidences were less in females than males at 17 weeks after AOM. BB tended (0.1 > P > 0.05) to reduce overall gastrointestinal tract tumor incidence in males, however, tumor incidence in females was unaffected (P > 0.1) by BB. There was a tendency (0.1 > P > 0.05) for fewer adenocarcinomas (relative to total of adenomatous polyps plus adenocarcinomas) in colons of female than male tumor-bearing rats; in small intestine, this gender difference was significant (P < 0.05). BB favored (P < 0.05) fewer adenocarcinomas and more adenomatous polyps (as a proportion of total tumor number) in female rat small intestine. Conclusion Results did not indicate robust cancer-preventive effects of BB. Blueberry influenced ACF occurrence in distal colon and tumor progression in duodenum, in gender-specific fashion. Data indicate the potential for slowing tumor progression (adenomatous polyp to adenocarcinoma) by BB.
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Affiliation(s)
- Frank A Simmen
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, 4301 W. Markham Street, Little Rock, AR 72205, USA.
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Sidelnikov E, Bostick RM, Flanders WD, Long Q, Cohen VL, Dash C, Seabrook ME, Fedirko V. MutL-homolog 1 expression and risk of incident, sporadic colorectal adenoma: search for prospective biomarkers of risk for colorectal cancer. Cancer Epidemiol Biomarkers Prev 2009; 18:1599-609. [PMID: 19423536 DOI: 10.1158/1055-9965.epi-08-0800] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
To characterize the expression of the mismatch repair gene MutL-homolog 1 (MLH1) in normal colorectal crypts in humans, and assess parameters of its expression as a potential biomarker of risk for colorectal neoplasms, we conducted a pilot, colonoscopy-based case-control study (51 cases, 154 controls) of incident, sporadic colorectal adenoma. Biopsies of normal-appearing rectal, sigmoid, and ascending colon mucosa were procured, immunohistochemically processed for MLH1 protein, and analyzed using custom quantitative image analysis procedures. MLH1 expression in the ascending colon was, on average, 49% proportionally lower in cases than controls (P = 0.03), but there was little evidence for case-control differences in the rectum and sigmoid colon. In cases and controls, average MLH1 expression in the ascending colon tended to be lower with increased age [by 56% (P = 0.02) and 25% (P = 0.16), respectively, for those > or =55 years], and with a history of colorectal cancer in a first-degree relative (by 22% [P = 0.56] and 34% [P = 0.16], respectively). Among cases, but not controls, average MLH1 expression tended to be higher with current alcohol consumption, regular aspirin use, and higher total intakes of calcium, vitamin D, and folate. There was little indication of similar differences in the rectum. These preliminary data suggest that lower MLH1 expression in the normal colonic mucosa, at least in the ascending colon, may be associated with increased risk of incident, sporadic colorectal adenoma, as well as with modifiable risk factors for colorectal neoplasms, thus supporting further investigation of MLH1 expression as a potential "treatable" biomarker of risk for colorectal neoplasms.
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Affiliation(s)
- Eduard Sidelnikov
- Department of Epidemiology, Emory University, Atlanta, GA 30322, USA
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Wu H, Dai Q, Shrubsole MJ, Ness RM, Schlundt D, Smalley WE, Chen H, Li M, Shyr Y, Zheng W. Fruit and vegetable intakes are associated with lower risk of colorectal adenomas. J Nutr 2009; 139:340-4. [PMID: 19091801 PMCID: PMC2646202 DOI: 10.3945/jn.108.098889] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Many phytochemicals in fruits and vegetables have been shown to have cancer-inhibitory effects in animal studies. These effects on cancer, however, have not been clearly demonstrated in human studies. This study investigated the association between fruit and vegetable intakes and the risk of adenomatous polyps. Participants were part of the Tennessee Colorectal Polyp Study. Eligible participants aged 40-75 y were recruited from patients undergoing colonoscopy at 2 medical centers in Nashville, Tennessee from 2003 to 2005. Cases had at least one adenoma and controls were polyp free. Dietary intake was assessed using a self-administered FFQ. Associations between dietary intakes and adenoma risk were evaluated using unconditional logistic regression with restricted cubic function spline. In multivariate analyses of 764 cases and 1517 controls, increased intakes of total fruits, berries, fruit juice, and green leafy vegetables were associated with reduced adenoma risk. The odds ratio for upper tertile intake compared with lower was 0.66 (95% CI = 0.51-0.86) for total fruits, 0.64 (95% CI = 0.47-0.87) for berries, 0.72 (95% CI = 0.56-0.92) for fruit juice, and 0.74 (95% CI = 0.58-0.96) for green vegetables. This study provides additional evidence that high total fruit intake and certain fruit and vegetable intakes may be associated with a reduced risk of colorectal adenomas.
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Affiliation(s)
- Huiyun Wu
- Department of Biostatistics and Vanderbilt-Ingram Cancer Center/Cancer Biostatistics Center; Division of General Internal Medicine and Public Health, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Division of Gastroenterology, Vanderbilt University, Nashville, TN 37232; Department of Veterans Affairs, Tennessee Valley Healthcare System, Geriatric, Research, Education and Clinical Center (GRECC), Nashville, TN 37212
| | - Qi Dai
- Department of Biostatistics and Vanderbilt-Ingram Cancer Center/Cancer Biostatistics Center; Division of General Internal Medicine and Public Health, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Division of Gastroenterology, Vanderbilt University, Nashville, TN 37232; Department of Veterans Affairs, Tennessee Valley Healthcare System, Geriatric, Research, Education and Clinical Center (GRECC), Nashville, TN 37212
| | - Martha J. Shrubsole
- Department of Biostatistics and Vanderbilt-Ingram Cancer Center/Cancer Biostatistics Center; Division of General Internal Medicine and Public Health, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Division of Gastroenterology, Vanderbilt University, Nashville, TN 37232; Department of Veterans Affairs, Tennessee Valley Healthcare System, Geriatric, Research, Education and Clinical Center (GRECC), Nashville, TN 37212
| | - Reid M. Ness
- Department of Biostatistics and Vanderbilt-Ingram Cancer Center/Cancer Biostatistics Center; Division of General Internal Medicine and Public Health, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Division of Gastroenterology, Vanderbilt University, Nashville, TN 37232; Department of Veterans Affairs, Tennessee Valley Healthcare System, Geriatric, Research, Education and Clinical Center (GRECC), Nashville, TN 37212
| | - David Schlundt
- Department of Biostatistics and Vanderbilt-Ingram Cancer Center/Cancer Biostatistics Center; Division of General Internal Medicine and Public Health, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Division of Gastroenterology, Vanderbilt University, Nashville, TN 37232; Department of Veterans Affairs, Tennessee Valley Healthcare System, Geriatric, Research, Education and Clinical Center (GRECC), Nashville, TN 37212
| | - Walter E. Smalley
- Department of Biostatistics and Vanderbilt-Ingram Cancer Center/Cancer Biostatistics Center; Division of General Internal Medicine and Public Health, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Division of Gastroenterology, Vanderbilt University, Nashville, TN 37232; Department of Veterans Affairs, Tennessee Valley Healthcare System, Geriatric, Research, Education and Clinical Center (GRECC), Nashville, TN 37212
| | - Heidi Chen
- Department of Biostatistics and Vanderbilt-Ingram Cancer Center/Cancer Biostatistics Center; Division of General Internal Medicine and Public Health, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Division of Gastroenterology, Vanderbilt University, Nashville, TN 37232; Department of Veterans Affairs, Tennessee Valley Healthcare System, Geriatric, Research, Education and Clinical Center (GRECC), Nashville, TN 37212
| | - Ming Li
- Department of Biostatistics and Vanderbilt-Ingram Cancer Center/Cancer Biostatistics Center; Division of General Internal Medicine and Public Health, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Division of Gastroenterology, Vanderbilt University, Nashville, TN 37232; Department of Veterans Affairs, Tennessee Valley Healthcare System, Geriatric, Research, Education and Clinical Center (GRECC), Nashville, TN 37212
| | - Yu Shyr
- Department of Biostatistics and Vanderbilt-Ingram Cancer Center/Cancer Biostatistics Center; Division of General Internal Medicine and Public Health, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Division of Gastroenterology, Vanderbilt University, Nashville, TN 37232; Department of Veterans Affairs, Tennessee Valley Healthcare System, Geriatric, Research, Education and Clinical Center (GRECC), Nashville, TN 37212
| | - Wei Zheng
- Department of Biostatistics and Vanderbilt-Ingram Cancer Center/Cancer Biostatistics Center; Division of General Internal Medicine and Public Health, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Division of Gastroenterology, Vanderbilt University, Nashville, TN 37232; Department of Veterans Affairs, Tennessee Valley Healthcare System, Geriatric, Research, Education and Clinical Center (GRECC), Nashville, TN 37212
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Armitage CJ. Effects of an implementation intention-based intervention on fruit consumption. Psychol Health 2007. [DOI: 10.1080/14768320601070662] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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de Vogel S, van Engeland M, Lüchtenborg M, de Bruïne AP, Roemen GMJM, Lentjes MHFM, Goldbohm RA, van den Brandt PA, de Goeij AFPM, Weijenberg MP. Dietary folate and APC mutations in sporadic colorectal cancer. J Nutr 2006; 136:3015-21. [PMID: 17116713 DOI: 10.1093/jn/136.12.3015] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Folate deficiency has been associated with colorectal cancer risk and may be involved in colorectal carcinogenesis through increased chromosome instability, gene mutations, and aberrant DNA methylation. Within the Netherlands Cohort Study on diet and cancer, we investigated the associations between dietary folate intake and colorectal cancer risk with (APC(+)) and without (APC(-)) truncating APC mutations, accounting for hMLH1 expression and K-ras mutations. In total, 528 cases and 4200 subcohort members were available for data analyses of the study cohort (n = 120,852) from a follow-up period between 2.3 and 7.3 y after baseline. Adjusted gender-specific incidence rate ratios (RR) over tertiles of folate intake were calculated in case-cohort analyses for colon and rectal cancer. Although relatively high folate intake was not associated with overall colorectal cancer risk, it reduced the risk of APC(-)colon tumors in men (RR 0.58, 95% CI 0.32-1.05, P(trend) = 0.06 for the highest vs. lowest tertile of folate intake). In contrast, it was positively associated with APC(+) colon tumors in men (highest vs. lowest tertile: RR 2.77, 95% CI 1.29-5.95, P(trend) = 0.008) and was even stronger when the lack of hMLH1 expression and K-ras mutations were excluded (RR 3.99, 95% CI 1.43-11.14, P(trend) = 0.007). Such positive associations were not observed among women; nor was folate intake associated with rectal cancer when APC mutation status was taken into account. Relatively high folate consumption reduced the risk of APC(-) colon tumors, but folate intake was positively associated with APC(+) colon tumors among men. These opposite results may indicate that folate enhances colorectal carcinogenesis through a distinct APC mutated pathway.
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Affiliation(s)
- Stefan de Vogel
- Research Institute Growth and Development (GROW), Department of Epidemiology, Maastricht University, Maastricht, The Netherlands.
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Paz-Elizur T, Brenner DE, Livneh Z. Interrogating DNA repair in cancer risk assessment. Cancer Epidemiol Biomarkers Prev 2005; 14:1585-7. [PMID: 16030087 DOI: 10.1158/1055-9965.epi-14-7-ed] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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