Vitamin B6 and risk of colorectal cancer: a meta-analysis of prospective studies
- PMID: 20233826
- DOI: 10.1001/jama.2010.263
Vitamin B6 and risk of colorectal cancer: a meta-analysis of prospective studies
Abstract
Context: Mounting evidence indicates that vitamin B(6), a coenzyme involved in nearly 100 enzymatic reactions, may reduce the risk of colorectal cancer.
Objective: To conduct a systematic review with meta-analysis of prospective studies assessing the association of vitamin B(6) intake or blood levels of pyridoxal 5'-phosphate (PLP; the active form of vitamin B(6)) with risk of colorectal cancer.
Data sources: Relevant studies were identified by a search of MEDLINE and EMBASE databases to February 2010, with no restrictions. We also reviewed reference lists from retrieved articles.
Study selection: We included prospective studies that reported relative risk (RR) estimates with 95% confidence intervals (CIs) for the association between vitamin B(6) intake or blood PLP levels and the risk of colorectal, colon, or rectal cancer.
Data extraction: Two authors independently extracted data and assessed study quality. Study-specific RRs were pooled using a random-effects model.
Data synthesis: Nine studies on vitamin B(6) intake and 4 studies on blood PLP levels were included in the meta-analysis. The pooled RRs of colorectal cancer for the highest vs lowest category of vitamin B(6) intake and blood PLP levels were 0.90 (95% CI, 0.75-1.07) and 0.52 (95% CI, 0.38-0.71), respectively. There was heterogeneity among studies of vitamin B(6) intake (P = .01) but not among studies of blood PLP levels (P = .95). Omitting 1 study that contributed substantially to the heterogeneity among studies of vitamin B(6) intake yielded a pooled RR of 0.80 (95% CI, 0.69-0.92). The risk of colorectal cancer decreased by 49% for every 100-pmol/mL increase (approximately 2 SDs) in blood PLP levels (RR, 0.51; 95% CI, 0.38-0.69).
Conclusion: Vitamin B(6) intake and blood PLP levels were inversely associated with the risk of colorectal cancer in this meta-analysis.
Comment in
-
Vitamin B6, blood PLP level, and risk of colorectal cancer.JAMA. 2010 Jun 9;303(22):2251-2; author reply 2252. doi: 10.1001/jama.2010.735. JAMA. 2010. PMID: 20530776 No abstract available.
-
[Colorectal cancer: epidemiology and primary profilaxis].Acta Gastroenterol Latinoam. 2011 Mar;41(1):70-3. Acta Gastroenterol Latinoam. 2011. PMID: 21539071 Spanish. No abstract available.
Similar articles
-
Association Between Vitamin B6 and the Risk of Colorectal Cancer: A Meta-analysis of Observational Studies.Nutr Cancer. 2023;75(5):1281-1294. doi: 10.1080/01635581.2023.2191823. Epub 2023 Mar 24. Nutr Cancer. 2023. PMID: 36961108
-
Vitamin B6 and Cancer Risk: A Field Synopsis and Meta-Analysis.J Natl Cancer Inst. 2017 Mar 1;109(3):1-9. doi: 10.1093/jnci/djw230. J Natl Cancer Inst. 2017. PMID: 28376200 Review.
-
Association between vitamin D and risk of colorectal cancer: a systematic review of prospective studies.J Clin Oncol. 2011 Oct 1;29(28):3775-82. doi: 10.1200/JCO.2011.35.7566. Epub 2011 Aug 29. J Clin Oncol. 2011. PMID: 21876081 Review.
-
Vitamin B6, blood PLP level, and risk of colorectal cancer.JAMA. 2010 Jun 9;303(22):2251-2; author reply 2252. doi: 10.1001/jama.2010.735. JAMA. 2010. PMID: 20530776 No abstract available.
-
Plasma vitamin B6 and the risk of colorectal cancer and adenoma in women.J Natl Cancer Inst. 2005 May 4;97(9):684-92. doi: 10.1093/jnci/dji116. J Natl Cancer Inst. 2005. PMID: 15870439
Cited by
-
Vitamin B6 deficiency cooperates with oncogenic Ras to induce malignant tumors in Drosophila.Cell Death Dis. 2024 Jun 3;15(6):388. doi: 10.1038/s41419-024-06787-3. Cell Death Dis. 2024. PMID: 38830901 Free PMC article.
-
The Effect of Rare-Earth Elements on the Morphological Aspect of Borate and Electrocatalytic Sensing of Biological Compounds.Biosensors (Basel). 2023 Sep 22;13(10):901. doi: 10.3390/bios13100901. Biosensors (Basel). 2023. PMID: 37887094 Free PMC article.
-
Vitamin B6 is governed by the local compartmentalization of metabolic enzymes during growth.Sci Adv. 2023 Sep 8;9(36):eadi2232. doi: 10.1126/sciadv.adi2232. Epub 2023 Sep 8. Sci Adv. 2023. PMID: 37682999 Free PMC article.
-
Is hysterectomy associated with kidney cancer risk? A meta-analysis of cohort studies.Front Oncol. 2023 Jul 20;13:1181112. doi: 10.3389/fonc.2023.1181112. eCollection 2023. Front Oncol. 2023. PMID: 37546408 Free PMC article.
-
Vitamin B-6 and riboflavin, their metabolic interaction, and relationship with MTHFR genotype in adults aged 18-102 years.Am J Clin Nutr. 2022 Dec 19;116(6):1767-1778. doi: 10.1093/ajcn/nqac240. Am J Clin Nutr. 2022. PMID: 36264281 Free PMC article. Clinical Trial.
Publication types
MeSH terms
Substances
LinkOut - more resources
Full Text Sources
Medical
Research Materials