High Tea Consumption on Smoking Related Oxidative Stress

Lung Cancer Prevention Clinical Trial

Official title:

A Chemoprevention Trial to Study the Effects of High Tea Consumption on Smoking Related Oxidative Stress

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02719860
• Other study ID #: 03-0014
• Status: Completed
• Phase: Phase 2
• First received: March 8, 2016
• Last updated: March 24, 2016
• Start date: September 2003
• Est. completion date: December 2007

Study information

• Verified date: March 2016
• Source: University of Arizona
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Institutional Review Board
• Study type: Interventional

Clinical Trial Summary

The overall objective of this study is to determine the effect of high tea consumption on biological markers of oxidative stress that mediate lung cancer risk.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 154
• Est. completion date: December 2007
• Est. primary completion date: December 2007
• Gender: Both
• Age group: 40 Years to 80 Years

Eligibility

Inclusion Criteria:

• FEV1 < 85% and at least 25 pack-years of current or former smoking history.

• No diagnosis of internal cancer within the last 5 years or no chemotherapy or radiation for an internal cancer within the last 5 years.

• Meets the Southwest Oncology Group (SWOG) performance status criteria of 0-1.

• Not be pregnant or intending to get pregnant during the study period (women participants).

• Willing to drink 4 cups of tea (each cup will be brewed with 2 tea bags and 12 ounces of water) for 1-month run-in period and for the 6-month intervention period.

• Willing to refrain from consuming other tea or tea products starting one month before the placebo run-in period and for the entire study period (a total of 8 months)

• Willing to refrain from consuming more than one caffeinated product (coffee, soda..) starting one month before the placebo run-in period and for the entire study period (a total of 8 months).

• Subjects cannot take mega-doses of vitamins during the trial. This is defined as more than 400 IU of vitamin E, 200 ug of selenium, or 1 gm of vitamin C per day, or more than the tolerable upper limits of any other supplement as defined in the Dietary Reference Intake panels developed by the Food and Nutrition Board under the Institute of Medicine. Such vitamin therapy must be discontinued at least 2 weeks prior to study entry.

Exclusion Criteria:

• Subjects immunosuppressed by virtue of medication or disease.

• Serious concurrent illness that could interfere with study regimen.

• Subjects with a history of invasive cancer within the past 5 years.

• Subjects who are drinking more than 5 cups of non-herbal tea per week.

• Subjects who cannot or are unwilling to consume caffeinated beverages.

• Subjects unable to perform forced expiratory maneuver during spirometry testing.

• More than one acute emphysema exacerbation within the last 6 month -period .

• Subjects on oxygen.

• Women with positive urinary pregnancy test.

Study Design

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Double-Blind, Primary Purpose: Prevention

Related Conditions & MeSH terms

• Lung Cancer Prevention

Intervention

Dietary Supplement:
• Green tea
4 cups/day of green tea for 6 months; each cup is prepared by brewing 2 tea bags in 12 oz of water
• Black tea
4 cups/day of black tea for 6 months; each cup is prepared by brewing 2 tea bags in 12 oz of water
• Placebo tea
4 cups/day of placebo tea for 6 months; each cup is prepared by brewing 2 tea bags in 12 oz of water

Locations

Country	Name	City	State
n/a

Sponsors (2)

Lead Sponsor	Collaborator
University of Arizona	United States Department of Defense

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Post-intervention change in urinary 8-hydroxydeoxyguanosine		Baseline and 6 months	No
Primary	Post-intervention change in urinary 8-F2-isoprostanes		Baseline and 6 months	No