Effects of Green Tea Extracts on Gastric Mucosal Protection

NCT ID: NCT04742985

Last Updated: 2021-08-02

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

24 participants

Study Classification

INTERVENTIONAL

Study Start Date

2021-02-15

Study Completion Date

2021-06-30

Brief Summary

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The investigators conduct a randomized, double-blind, placebo-controlled pilot study to investigate the effects of a combined extract of green tea seed (saponins) and green tea leaves (epigallocatechin-3-gallate) on gastric mucosal protection in adults with functional dyspepsia for 8 weeks.

Detailed Description

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A previous study has indicated that combined extract of green tea seed (saponins) and green tea leaves (epigallocatechin-3-gallate) may improve gastric mucosal status in rat with alcohol-induced gastritis.Therefore, the investigators conduct a randomized, double-blind, placebo-controlled pilot study to investigate the effects of a combined extract of green tea seed (saponins) and green tea leaves (epigallocatechin-3-gallate) on gastric mucosal protection in adults with functional dyspepsia for 8 weeks; the safety of the compound are also evaluated. The Investigators examine C-reactive protein, IFN-γ, TNF-α, gastrin, malondialdehyde, 8-hydroxy-2' -deoxyguanosine, and questionnaires (Gastrointestinal Symptom Rating Scale, Nepean dyspepsia index-Korean version, Nepean dyspepsia index-Korean version QOL questionnaire, Gastrointestinal symptom scale) at baseline and after 8 weeks of intervention. Twenty four adults were administered either 320 mg of combined extracts of green tea seed (saponins) and green tea leaves (epigallocatechin-3-gallate) or a placebo each day for 8 weeks.

Conditions

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Functional Dyspepsia

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Caregivers Investigators

Study Groups

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Green tea combined extracts group A

This group takes Green tea combined extracts (62.5 mg) for 8 weeks.

Group Type EXPERIMENTAL

Green tea combined extracts group

Intervention Type DIETARY_SUPPLEMENT

Green tea combined extracts 320 mg/day (main compound 62,5 mg for A group, 125 mg for B group) during 8 weeks

Green tea combined extracts group B

This group takes Green tea combined extracts (125 mg) for 8 weeks.

Group Type EXPERIMENTAL

Green tea combined extracts group

Intervention Type DIETARY_SUPPLEMENT

Green tea combined extracts 320 mg/day (main compound 62,5 mg for A group, 125 mg for B group) during 8 weeks

Placebo group

This group takes placebo for 8 weeks.

Group Type PLACEBO_COMPARATOR

Placebo group

Intervention Type DIETARY_SUPPLEMENT

Placebo 320 mg/day during 8 weeks

Interventions

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Green tea combined extracts group

Green tea combined extracts 320 mg/day (main compound 62,5 mg for A group, 125 mg for B group) during 8 weeks

Intervention Type DIETARY_SUPPLEMENT

Placebo group

Placebo 320 mg/day during 8 weeks

Intervention Type DIETARY_SUPPLEMENT

Eligibility Criteria

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Inclusion Criteria

* The Rome IV criteria define dyspepsia as any combination of 4 symptoms: postprandial fullness, early satiety, epigastric pain, and epigastric burning that are severe enough to interfere with the usual activities and occur at least 3 days per week over the last 3 months

Exclusion Criteria

* Patients complaining of severe gastrointestinal symptoms requiring immediate medication
* Those with a history of gastric acid hypersecretion such as Zollinger-Ellison Syndrome
* Those who received Helicobacter pylori eradication therapy within 4 weeks
* Those who have taken nonsteroidal anti-inflammatory drugs, steroid drugs or antibiotics, aspirin or antithrombotic drugs, or gastric acid suppressants within 4 weeks
* Those who have a history of upper gastrointestinal tract surgery, stenosis, bleeding, esophageal dilatation, gastric mucosal resection, etc. within the past 1 year
* Patients with gastric ulcer (active or healing), duodenal ulcer (active or healing), reflux esophagitis (LA B or higher), or malignant tumors from gastroscopy performed within the last 6 months
* Abnormal liver or renal function (more than twice the normal upper limit of the research institute)
* Uncontrolled diabetes mellitus (\>160 mg/dL of fasting blood sugar)
* History of fracture during the previous year
* Uncontrolled hypertension (\>160/100 mmHg)
* Uncontrolled thyroid diseases.
* History of serious cerebro-cardiovascular diseases or cancer such as angina or myocardial infarction within 6 months
* History of any central bone fracture within 1 year
* History of medication for psychiatric diseases such as severe depression, schizophrenia, drug intoxication.
* Alcohol abuser
* Allergic reaction to Ishige Okamurae
* Those who participated in other drug clinical trials within 1 month from the screening date.
* Severe gastrointestinal symptoms such as heartburn and indigestion
* Those who are pregnant, lactating, or plan to become pregnant during the clinical trial
* Those who are judged to be unsuitable by the PI for other reasons
Minimum Eligible Age

19 Years

Maximum Eligible Age

75 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Pusan National University Yangsan Hospital

OTHER

Sponsor Role lead

Responsible Party

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Sang Yeoup Lee

Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Sang Yeoup Lee, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Pusan National University Yangsan Hospital

Locations

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Pusan National University Yangsan Hospital

Yangsan, Gyeungsangnam-do, South Korea

Site Status

Countries

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South Korea

Other Identifiers

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02-2020-048

Identifier Type: -

Identifier Source: org_study_id

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