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

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

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00718094
Enrollment
20
Registered
2008-07-18
Start date
2008-03-31
Completion date
2012-04-30
Last updated
2017-12-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Mild to Moderately Active Ulcerative Colitis

Keywords

Ulcerative colitis, EGCG, Green tea polyphenols, Inflammatory bowel disease, Colitis, IBD, Green tea

Brief summary

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.

Interventions

DRUGPolyphenon E®

Oral capsules

DRUGPlacebo Oral Tablet

Oral tablet: placebo

Sponsors

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
CollaboratorNIH
University of Louisville
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 85 Years
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

Design outcomes

Primary

MeasureTime frameDescription
Number of Subjects With a Reduction in the Disease Activity Index of >3, or Clinical Remission.day 56This Index is a measure of ulcerative colitis severity. The index assesses four variables, which include stool frequency, severity of bleeding, colonic mucosal appearance, and the physician's overall assessment of disease activity. Each variable is scored from 0-3 so that the total index score ranges from 0-12; 0-2: remission; 3-6: mild; 7-10: moderate; \>10: severe UC.

Countries

United States

Participant flow

Participants by arm

ArmCount
Polyphenon E Treatment
Polyphenon E®: Oral capsules
15
Placebo
Oral Placebo Placebo Oral Tablet: Oral tablet: placebo
5
Total20

Baseline characteristics

CharacteristicTotalPolyphenon E TreatmentPlacebo
Age, Continuous40 years
STANDARD_DEVIATION 15
44.9 years
STANDARD_DEVIATION 15
30.7 years
STANDARD_DEVIATION 14.4
Region of Enrollment
United States
20 participants15 participants5 participants
Sex: Female, Male
Female
8 Participants8 Participants0 Participants
Sex: Female, Male
Male
12 Participants7 Participants5 Participants
Ulcerative colitis (UC) disease activity index7.0 units on a scale
STANDARD_DEVIATION 1.7
6.5 units on a scale
STANDARD_DEVIATION 1.7
7.3 units on a scale
STANDARD_DEVIATION 1.7

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 150 / 5
other
Total, other adverse events
0 / 150 / 5
serious
Total, serious adverse events
1 / 150 / 5

Outcome results

Primary

Number of Subjects With a Reduction in the Disease Activity Index of >3, or Clinical Remission.

This Index is a measure of ulcerative colitis severity. The index assesses four variables, which include stool frequency, severity of bleeding, colonic mucosal appearance, and the physician's overall assessment of disease activity. Each variable is scored from 0-3 so that the total index score ranges from 0-12; 0-2: remission; 3-6: mild; 7-10: moderate; \>10: severe UC.

Time frame: day 56

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Polyphenon E TreatmentNumber of Subjects With a Reduction in the Disease Activity Index of >3, or Clinical Remission.10 Participants
PlaceboNumber of Subjects With a Reduction in the Disease Activity Index of >3, or Clinical Remission.0 Participants
p-value: 0.03Fisher Exact

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026