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CompletedNCT02432651Updated Nov 6, 2018

Xanthohumol and Prevention of DNA Damage

A Phase 1 interventional study of 6 mg xanthohumol per day and 12 mg xanthohumol per day in Oxidative Stress, sponsored by Oregon State University. Completed at 1 site in United States. Open to participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2018-11-06.

Sponsored by Oregon State University · Phase 1, Interventional, and Prevention

Phase
Phase 1
Study type
Interventional
Enrollment
64
Allocation
Randomized
Ages
18 Years to 50 Years
Sex
All
01

Study summary

The purpose of this research study is to learn if and in what amount a compound from hops, called xanthohumol (ZAN-tho-HUE-mol), prevents damage to DNA and oxidative stress. The human body is constantly exposed to oxidative stress from environmental compounds (e.g. air pollution) which may cause damage to DNA. The human body can repair some DNA damage, but too much DNA damage is harmful and may lead to cancer. Research done at OSU and around the world has shown that xanthohumol can stop or slow processes that lead to cancer.

Read the detailed description

The purpose of this research study is to learn if and in what amount a compound from hops, called xanthohumol (ZAN-tho-HUE-mol), prevents damage to DNA and oxidative stress. The human body is constantly exposed to oxidative stress from environmental compounds (e.g. air pollution) which may cause damage to DNA. The human body can repair some DNA damage, but too much DNA damage is harmful and may lead to cancer. Research done at OSU and around the world has shown that xanthohumol can stop or slow processes that lead to cancer.

Participants will consume a non-alcoholic beverage containing xanthohumol with breakfast, lunch and dinner for 3 weeks. Then they will go through a washout period of 3 weeks. And then they will consume the same beverage without the xanthohumol compound (placebo) for another 3 weeks. Participants will be randomly assigned into groups and will vary whether they will consume the xanthohumol product during the first or second 3-week period. Xanthohumol doses will be 0, 6, 12 or 24 mg/day.

The study includes donation of blood and urine samples and one-month food frequency questionnaires.

02

Conditions studied

  • Oxidative Stress

Keywords

  • oxidative stress
  • hops
  • xanthohumol
  • DNA damage
  • cancer
03

In context

Lead sponsor

Oregon State University is the lead sponsor of 37 studies on the registry; 3 are open to participants now.

Of its 6 completed or terminated interventional studies of FDA-regulated products, 4 (67%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Non-smokers or no other tobacco use in the past 3 months.
  • Willing to stop taking regular supplements including anti-oxidants for 2 weeks prior to study entry through conclusion of study.
  • Willing to stop consumption of high levels of flavonoids and xanthohumol in the normal diet (onions, teas including green/black tea and microbrew beers) for 2 weeks prior to study entry through conclusion of study.
  • Must be able to give written informed consent.
  • Blood screen tests (Comprehensive metabolic profile [CMP] and lipid profile) within normal limits.

Exclusion criteria

Exclusion Criteria:

  • Body Mass Index (BMI) less than 18.5 (underweight) or greater than 30 (obese)
  • Have a significant acute or chronic coexisting illness such as cardiovascular disease, chronic kidney or liver disease, gastrointestinal disorder, endocrinological disorder, immunological disorder, metabolic disease, cancer, history of chemotherapy, celiac disease or gluten/wheat intolerance*, diabetes, thyroid problems, or any condition which contraindicates, in the investigators judgement, entry into the study.
  • Currently taking prescription drugs except oral contraceptives.
  • Consumption of more than the recommended alcohol guidelines i.e. >2 drinks/day.
  • Consumption of high levels of flavonoids and xanthohumol in the normal diet (onions, teas including green/black tea and microbrew beers).
  • Pregnancy (as confirmed by urine pregnancy test), breastfeeding, or planning to become pregnant before completing the study.
  • Undergoing UV therapy (e.g. treatment for skin conditions such as psoriasis), using UV tanning beds, or unprotected sun exposure greater than 1 hour per day.
  • Engaging in vigorous exercise more than 6 hours per week.
  • Participation in another dietary study in the past 3 months.
  • Had surgery in the last 3 months.
  • Post-menopausal status

(*Note: Beverage is formulated with a barley extract. Barley contains gluten.)

05

Study design

Phase
Phase 1
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
64 participants (actual)

Study arms

  • Other
    6 mg xanthohumol per day vs. placebo

    All participants take 6 mg xanthohumol daily and placebo in a crossover design with a washout period.

    Drug: 6 mg xanthohumol per day · Drug: Placebo

  • Other
    12 mg xanthohumol per day vs. placebo

    All participants take 12 mg xanthohumol daily and placebo in a crossover design with a washout period.

    Drug: 12 mg xanthohumol per day · Drug: Placebo

  • Other
    24 mg xanthohumol per day vs. placebo

    All participants take 24 mg xanthohumol daily and placebo in a crossover design with a washout period.

    Drug: 24 mg xanthohumol per day · Drug: Placebo

Interventions

  • Drug6 mg xanthohumol per day

    Participants will consume non-alcoholic beverage with 2 mg xanthohumol at breakfast, lunch and dinner for 3 weeks.

  • Drug12 mg xanthohumol per day

    Participants will consume a non-alcoholic beverage with 2 mg xanthohumol at breakfast and lunch and 8 mg at dinner for 3 weeks.

  • Drug24 mg xanthohumol per day

    Participants will consume a non-alcoholic beverage with 8 mg xanthohumol at breakfast, lunch and dinner for 3 weeks.

  • DrugPlacebo

    Participants will consume a placebo non-alcoholic beverage (0 mg xanthohumol) at breakfast, lunch and dinner for 3 weeks.

06

What researchers measure

Primary outcomes

  1. Comparison of the change in markers of DNA damage and oxidative stress during XN treatment vs. the change during placebo

    Plasma and urine levels of 8-oxo-dG will be measured at the beginning and end of each 3-week cycle. DNA strand breaks in blood cells and plasma levels of reduced and oxidized glutathione will be measured at the beginning and end of each 3-week cycle. Between the two cycles, there will be a 3-week washout. One cycle is XN treatment, and one cycle is the placebo.

    Time frame: Prior to first dose on day 1 to day 63.

Secondary outcomes

  1. Comparison of the change in metabolic profile during XN treatment vs. the change during placebo

    Metabolome measurements in plasma at beginning and end of first 3-week cycle with 3-week. Between the two cycles, there will be a 3-week washout period between cycles. One cycle is XN treatment, and one cycle is the placebo.

    Time frame: Prior to first dose on day 1 to day 63.

07

Study locations

1 site
  • Oregon State University
    Corvallis, Oregon 97331, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 6, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02432651
Lead sponsor
Oregon State University
Responsible party
Jan Frederik Stevens (Professor of Medicinal Chemistry, Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University) — Principal investigator
First posted
May 4, 2015
Start date
Mar 2015
Primary completion
Jun 2016
Completion
Jun 2017
Last update
Nov 6, 2018

Study contacts

Jan Frederik Stevens, PhD
principal investigator · Oregon State University

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Nov 2018. You cannot join it, but the record below documents what was studied.

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