Effect of Helicobacter Pylori on the Availability of Vitamin E and C
Recruitment status was Active, not recruiting
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Purpose
This study argues that H.pylori infection, by increasing the production of reactive oxygen species, increases the utilization of dietary antioxidants(Vit E and Vit C) that serve in quenching the free radicals, thus decreasing their serum levels and confounding their protective effect against gastric cancer.
| Condition | Intervention | Phase |
|---|---|---|
|
Heliobacter Pylori Infection |
Drug: vitamin C & E supplements |
Phase 4 |
| Study Type: | Interventional |
| Study Design: | Allocation: Non-Randomized Endpoint Classification: Pharmacokinetics/Dynamics Study Intervention Model: Parallel Assignment Masking: Open Label Primary Purpose: Prevention |
| Official Title: | Effect of Helicobacter Pylori on the Availability of Vitamin E and C |
- plasma vitamin C levels
- plasma vitamin E levels
- TBARS levels
| Estimated Enrollment: | 72 |
| Study Start Date: | March 2006 |
| Estimated Study Completion Date: | September 2007 |
It has been postulated that dietary antioxidants may reduce cancer risk by modulating red-ox status, by preventing biological oxidation, and by inhibiting the formation of carcinogen. However, supplementation studies and prospective studies have yielded contradictory results. In the case of gastric cancer, H.pylori infection, which is known to be associated with a higher risk of the disease, results in an increased production of ROS & RNS. As a result serum levels of these free radicals increase, exerting a higher demand for dietary antioxidants to neutralize them.
The fact that the relation between serum levels of antioxidants and gastric cancer is more consistent than that of dietary intake levels and the disease suggests the possibility of the presence of an intrinsic factor that is altering the true relation between dietary antioxidants and the cancer. This intrinsic factor, this study argues, is the infection with H.pylori.
H.pylori infection, by increasing the production of reactive oxygen species, increases the utilization of dietary antioxidants that serve in quenching the free radicals, thus decreasing their serum levels and confounding their protective effect against gastric cancer. The purpose of this pilot study is to investigate the possibility that H.pylori infection alters the bioavailability of the dietary antioxidants: vitamin C, and vitamin E. This project will be done in preparation for an etiologic study of dietary antioxidants and gastric cancer.
Eligibility| Ages Eligible for Study: | 18 Years to 45 Years |
| Genders Eligible for Study: | Both |
| Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
- Adult , age 18-45
Exclusion Criteria:
- Smoking
- Body mass index below 18 or above 25.
- Previous treatment for H.pylori infection
- Partial or total gastrectomy
- History of gastritis
- Currently taking antioxidants supplementation
- Training in an athletic team.
- Drinking more than 3 servings of alcohol/day
Contacts and Locations| Canada, Ontario | |
| Toronto General Hospital | |
| Toronto, Ontario, Canada | |
| Principal Investigator: | Farah Naja, MSc. | Canada: Cancer Care Ontario |
More Information
No publications provided
| ClinicalTrials.gov Identifier: | NCT00303160 History of Changes |
| Other Study ID Numbers: | 15344 |
| Study First Received: | March 14, 2006 |
| Last Updated: | August 13, 2007 |
| Health Authority: | Canada: University of Toronto Canada: Toronto General Hospital |
Keywords provided by University of Toronto:
|
heliobacter pylori infection reactive oxygen species antioxidants |
Additional relevant MeSH terms:
|
Ascorbic Acid Vitamin E Vitamins Antioxidants Molecular Mechanisms of Pharmacological Action |
Pharmacologic Actions Protective Agents Physiological Effects of Drugs Micronutrients Growth Substances |
ClinicalTrials.gov processed this record on May 22, 2013