Chemoprevention With Folic Acid
Summary
Colorectal neoplasia is the second most common cancer in the United States and other Western countries with about 140,000 newly diagnosed cases per year in the United States with a mortality rate of about 40%. The identification of a specific natural or synthetic compound with the ability to reverse or suppress the process of colon carcinogenesis would have profound implication in the development of colorectal adenomas and their subsequent transformation to colon cancer. Furthermore, the establishment of a correlative relationship between biomarkers of cell proliferation, differentiation, apoptosis and adenoma recurrence would provide pivotal data required to elucidate cell signaling mechanisms in future colon cancer chemoprevention trials.
Study Design
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Masking: Double-Blind, Primary Purpose: Prevention
Conditions
Colon Cancer
Intervention
Folic Acid
Location
Department of Veterans Affairs
Detroit
Michigan
United States
48201
Status
Completed
Source
Department of Veterans Affairs
Results (where available)
Links
- Source: http://clinicaltrials.gov/show/NCT00018551
- Information obtained from ClinicalTrials.gov on July 15, 2010
Published on BioPortfolio: 2014-07-24T14:35:01-0400
Clinical Trials
Bioavailability Study of Folic Acid in Healthy Women
The purpose of the study is to determine the bioavailability of orally administered folic acid compared with the i.v. administered folic acid, and to use the samples collected to validate ...
The purpose of the study is to determine the bioequivalence of Norgestimate (NGM) and Ethinyl Estradiol (EE) in 2 formulations of 250 mcg NGM/25 mcg EE, 1 without folic acid and 1 containi...
High levels of homocysteine, which is an amino acid in the blood, have been linked to an increased risk of heart disease. This study will examine the effect that differing levels of folic ...
Folic Acid and Creatine as Therapeutic Approaches for Lowering Blood Arsenic
The purpose of this study is to determine whether folic acid, alone or together with creatine supplementation, can lower blood arsenic concentrations and improve the ability to detoxify ar...
Folic Acid in Preventing Colorectal Polyps in Patients With Previous Colorectal Polyps
RATIONALE: Chemoprevention is the use of certain substances to keep cancer from forming. The use of folic acid may prevent colorectal cancer. PURPOSE: This randomized clinical trial is st...
PubMed Articles
Consumption of high-dose folic acid supplements is common throughout pregnancy and lactation in several countries, including Canada, Brazil, and the United States, and may lead to high levels of circu...
Maternal oversupplementation with folic acid and its impact on neurodevelopment of offspring.
Folic acid, a B vitamin, is vital for early neurodevelopment and is well known for its protective effect against neural tube defects. Various national health agencies worldwide recommend that women o...
A 2017 global update on folic acid-preventable spina bifida and anencephaly.
Spina bifida and anencephaly are largely preventable birth defects through mandatory folic acid fortification. Our objective was to estimate the proportion of folic acid-preventable spina bifida and a...
Folic acid and primary prevention of neural tube defects: a review.
With 4 mg folic acid daily, it may take 20 weeks to reach red-blood-cell folate levels between 1,050 and 1,340 nmol/L, optimal for reduction of the neural tube defect risk. Therefore, folic acid sup...
Causes of mortality in older patients with stage 3 colon cancer.
Life expectancy plays a key role in the selection of patients with stage III colon cancer for adjuvant chemotherapy, but little is known about causes of mortality in older patients with colon cancer. ...
Medical and Biotech [MESH] Definitions
Leucovorin
The active metabolite of FOLIC ACID. Leucovorin is used principally as its calcium salt as an antidote to folic acid antagonists which block the conversion of folic acid to folinic acid.
Folate Receptors, Gpi-anchored
Cell surface receptors that bind to and transport FOLIC ACID, 5-methyltetrahydrofolate, and a variety of folic acid derivatives. The receptors are essential for normal NEURAL TUBE development and transport folic acid via receptor-mediated endocytosis.
Pteroylpolyglutamic Acids
Derivatives of folic acid (pteroylglutamic acid). In gamma-glutamyl linkage they are found in many tissues. They are converted to folic acid by the action of pteroylpolyglutamate hydrolase or synthesized from folic acid by the action of folate polyglutamate synthetase. Synthetic pteroylpolyglutamic acids, which are in alpha-glutamyl linkage, are active in bacterial growth assays.
Folic Acid Deficiency
A nutritional condition produced by a deficiency of FOLIC ACID in the diet. Many plant and animal tissues contain folic acid, abundant in green leafy vegetables, yeast, liver, and mushrooms but destroyed by long-term cooking. Alcohol interferes with its intermediate metabolism and absorption. Folic acid deficiency may develop in long-term anticonvulsant therapy or with use of oral contraceptives. This deficiency causes anemia, macrocytic anemia, and megaloblastic anemia. It is indistinguishable from vitamin B 12 deficiency in peripheral blood and bone marrow findings, but the neurologic lesions seen in B 12 deficiency do not occur. (Merck Manual, 16th ed)
Folic Acid Transporters
Proteins involved in the transport of FOLIC ACID and folate derivatives across the CELLULAR MEMBRANE.
