Total Antioxidant Effects of Esomeprazole in Dyspeptic Patients Receiving Non-steroidal Anti-inflammatory Drugs

August 19, 2020 updated by: Timothy Koch, Medstar Health Research Institute

Effects of Esomeprazole Magnesium on Gastric Free Radical Production and Total Antioxidant Capacity in Dyspeptic Patients Receiving Non-steroidal Anti-inflammatory Drugs

The principal investigator hypothesizes that participants receiving NSAID drugs with dyspeptic symptoms have increased production of gastric levels of free radicals. The primary objective of the study is to determine if Esomeprazole Magnesium increases gastric total antioxidant capacity and decreases gastric free radical production in humans. Participants (age 18 years and older) with no history of upper GI bleeding who are receiving non-steroidal anti-inflammatory drugs and then develop dyspepsia will be recruited from our primary care clinic in Washington, DC. All eligible participants will undergo biopsies of antrum and corpus. The participants will be randomized to receive either Zantac OTC or Nexium for 15 days. On day 15, all participants will undergo repeat upper endoscopy to obtain biopsies of antrum and corpus. Tissue samples will then be extracted to determine total antioxidant capacity and lipid peroxide levels (as an indirect marker of free radical production).

Study Overview

Status

Withdrawn

Conditions

Intervention / Treatment

Detailed Description

An extensive meta-analysis has confirmed that dyspeptic symptoms are common in individuals using non-steroidal anti-inflammatory drugs (NSAIDs) (1). Both esomeprazole 20 mg daily and esomeprazole 40 mg daily have been shown to be more effective than placebo for the control of upper gastrointestinal symptoms in patients receiving NSAIDs (2).

The mechanisms by which H, K-ATPase inhibitors protect against NSAID gastropathy remain unclear, although it is known that their use is more clinically effective than the use of the H2-receptor antagonist, ranitidine (3).

The biochemical basis for NSAID gastropathy is not fully understood (6). One potential mechanism for the development of gastric damage in individuals receiving NSAIDs is oxidative stress related to depletion of gastric antioxidants. A recent endoscopic study in patients supports the hypothesis that NSAID use associated with gastric bleeding decreases gastric mucosal glutathione levels (7), a major cellular micronutrient antioxidant produced by mammalian cells. The principal investigator has been working on the possibility that activation of afferent nerve fibers by oxidative stress can induce abdominal discomfort during the use of NSAIDs. This notion is supported by animal studies that have shown that oxidants evoke neurotransmitter release from enteric neurons (8). This experimental result suggests that abnormal tissue levels of oxygen-derived free radicals (oxidative stress) could directly activate afferent enteric nerves or could alter gastric motility via a neuronal mechanism.

The hypothesis of this present proposal is that participants receiving NSAID drugs with dyspeptic symptoms have increased production of gastric levels of free radicals. The primary aims of this study are to examine gastric free radical production and total antioxidant capacity in participants who are taking NSAID drugs and have dyspeptic symptoms. Gastric free radical production and total antioxidant capacity will be measured before and after receiving either 15 days of daily esomeprazole magnesium or ranitidine.

Study Type

Interventional

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • District of Columbia
      • Washington, District of Columbia, United States, 20010
        • Washington Hospital Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Participants who are capable of providing informed consent, ages 18 years old and older. Partipants who are taking non-steroidal anti-inflammatory drugs on a daily basis must present with at least a 1 week history of dyspeptic symptoms including epigastric or upper abdominal discomfort or pain.

Exclusion Criteria:

  • Participants presenting with only a complaint of heartburn will be excluded. Participants with alarm symptoms of vomiting, evidence of bleeding, inadvertent weight loss, or dysphagia will be excluded. Participants will be excluded if they have had upper endoscopy within 6 months prior to randomization. At the initial visit, participants will have a Helicobacter pylori IgG serology drawn and all participants with a positive serology will be excluded. Participants with a previous history of myocardial infarction, cerebrovascular infarction, gastric or duodenal ulcer disease, or carcinoma will be excluded. The study will not enroll participants who have received a H, K-ATPase inhibitor within the past 2 weeks. At the initial upper endoscopy, all participants with esophageal ulcer, esophageal cancer, gastric ulcer, gastric cancer, and duodenal ulcer will be excluded.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: PPI
PPI Medication
Drug: Esomeprazole Magnesium
PPI compared to H2RA
Other Names:
  • Ranitidine
Experimental: H2RA
H2RA Medication
Drug: Esomeprazole Magnesium
PPI compared to H2RA
Other Names:
  • Ranitidine

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
gastric levels of total antioxidant capacity and gastric lipid peroxide levels on Day 22
Time Frame: 1 week
Measurement of tissue levels in stomach biopsies of total antioxidant capacity (in nmole of Trolox equivalent/g wet tissue) and lipid peroxides (in nmole/g wet tissue).
1 week

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Medstar Health Research Institute

Collaborators

AstraZeneca

Investigators

  • Principal Investigator: Timothy R Koch, MD, MedStar Health Research Institute

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Anticipated)

December 1, 2006

Primary Completion (Actual)

December 1, 2006

Study Completion (Actual)

December 1, 2006

Study Registration Dates

First Submitted

March 6, 2007

First Submitted That Met QC Criteria

March 6, 2007

First Posted (Estimate)

March 7, 2007

Study Record Updates

Last Update Posted (Actual)

August 24, 2020

Last Update Submitted That Met QC Criteria

August 19, 2020

Last Verified

August 1, 2020

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IRUSESOM0391

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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