Gastroesophageal Reflux Disease Clinical Trial
Official title:
Can Quercetin Increase Claudin-4 and Improve Esophageal Barrier Function in GERD?
Purpose:
1. Determine if oral quercetin increases the expression of claudin-4 in the lining of the
esophagus of patients with a diagnosis of gastroesophageal reflux disease (GERD); and
2. Determine whether the increase in claudin-4 by oral quercetin is accompanied by
improvement in the barrier function and acid resistance of the lining of the esophagus
of patients with a diagnosis of gastroesophageal reflux disease (GERD)
If interested, participants will be consented and provided a questionnaire to complete as
part of the study. Participants will undergo endoscopy for routine care and will have up to
8 esophageal biopsies (small tissue samples) taken for the research study. After endoscopy,
participants will be contacted to begin a 6 week treatment period with study drug
(Quercetin, taken twice daily).
At the end of the 6 week period, participants will be scheduled to have blood drawn and to
have a follow-up endoscopy with biopsies performed for the research study.
Patients must be symptomatic (heartburn) and agree to allow endoscopic biopsies from the lower 5 cm of esophagus for research purposes. If the endoscopy demonstrates non-erosive reflux disease, biopsies of Esophageal Squamous Epithelium (ESE) are obtained and placed in mRNA-Later to assess claudin-4 mRNA by qRT-PCR and protein expression by Western blot (53, 64) while other biopsies of ESE are obtained and handled as in SpAim#2 to assess barrier function of ESE. After consent, subjects complete a questionnaire assessing demographics, disease-specific parameters such as duration of symptoms and past treatment, and the gastroesophageal reflux disease (GERD) Symptom Assessment Scale (GSAS), a validated measure of GERD severity. Following this, patients in open label fashion are given orally 500 mg Quercetin (Q) twice daily (bid) [Pure, House of Nutrition, Yonkers, NY] for 6-weeks. Symptoms are monitored 1 week before and for the 6 week treatment period. At 6 weeks, a blood sample is obtained for determination of Q and its metabolites by HPLC and endoscopy and biopsies of ESE are repeated and processed as initially done for claudin-4 levels in ESE. ;
Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Basic Science
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