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Pilot Study of Green Tea Extract (Polyphenon E®)in Ulcerative Colitis

This study has been completed.
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Information provided by (Responsible Party):
University of Louisville Identifier:
First received: July 16, 2008
Last updated: January 17, 2017
Last verified: January 2017
Green tea consists of several components, with most research focusing on the polyphenol fraction. The polyphenol fraction(-)-epigallocatechin-3-gallate (EGCG)has been studied extensively as an anti-inflammatory agent as well as a preventative agent for cancer. It has been shown to effectively reduce the inflammation associated with animal models of inflammatory bowel disease. This clinical trial will determine the ability of EGCG, in the form of Polyphenon E®, to treat patients with mild to moderately severe ulcerative colitis.

Condition Intervention Phase
Mild to Moderately Active Ulcerative Colitis
Drug: Polyphenon E®
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Phase IIa Pilot Study to Determine the Safety of an Oral Dose of Green Tea Extract (Polyphenon E®) and Provide Preliminary Evidence to Support Its Efficacy in Ulcerative Colitis

Resource links provided by NLM:

Further study details as provided by University of Louisville:

Primary Outcome Measures:
  • A reduction in the Disease Activity Index of >3, or clinical remission. [ Time Frame: Two years ]

Enrollment: 20
Study Start Date: March 2008
Study Completion Date: April 2012
Primary Completion Date: October 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
Low dose Polyphenon E®
Drug: Polyphenon E®
Oral capsules
Experimental: 2
High dose Polyphenon E®
Drug: Polyphenon E®
Oral capsules
Placebo Comparator: 3 Drug: Polyphenon E®
Oral capsules


Ages Eligible for Study:   18 Years to 85 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Adult male or female with mildly to moderately active ulcerative colitis

Exclusion Criteria:

  • Off prohibited medications for proscribed period of time
  • Evidence of infectious colitis
  • Labs outside of range
  • Pregnancy or lactation
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00718094

United States, Kentucky
University of Louisville Clinical Research Center
Louisville, Kentucky, United States, 40202
Sponsors and Collaborators
University of Louisville
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Principal Investigator: Gerald W Dryden, MD, MSPH University of Louisville
  More Information

Responsible Party: University of Louisville Identifier: NCT00718094     History of Changes
Other Study ID Numbers: 390.05
5K23DK073750 ( US NIH Grant/Contract Award Number )
Study First Received: July 16, 2008
Last Updated: January 17, 2017

Keywords provided by University of Louisville:
Ulcerative colitis
Green tea polyphenols
Inflammatory bowel disease
Green tea

Additional relevant MeSH terms:
Colitis, Ulcerative
Gastrointestinal Diseases
Digestive System Diseases
Colonic Diseases
Intestinal Diseases
Pathologic Processes
Inflammatory Bowel Diseases processed this record on April 28, 2017