Broccoli Sprout Extracts in Healthy Volunteers: A Pilot Study of Nrf2 Pathway Modulation in Oral Mucosa (BSE)
A pilot study has been designed to determine (primary objective) if three brief interventions with three oral BSE regimens will alter mRNA biomarkers of Nrf2 pathway signaling, including NQO1, GSTs and AKRs, in the oral mucosa of healthy subjects. Quantitative distribution data and preliminary effect size for specific Nrf2 targets, as measured in serial buccal cell scrapings, will be determined during the course of 3-day exposures to three BSE regimens. These data will inform the design of a randomized, phase II chemoprevention trial in patients with HPV-negative HNSCC.
Ten healthy volunteers will be recruited for this pilot study, Age ≥ 18 years, both male and female: 1) The non-cancer population presenting to the University of Pittsburgh Eye and Ear Institute or the Hillman Cancer Center. This may include patients with benign disease or their friends/family members, or friends/family members of patients with cancer; 2) Professionals, staff, or students at the University of Pittsburgh.
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
|Official Title:||Broccoli Sprout Extracts in Healthy Volunteers: A Pilot Study of Nrf2 Pathway Modulation in Oral Mucosa|
- Determine the modulation of the Nrf2 pathway in response to short term exposure to three BSE regimens [ Time Frame: Three to 11 weeks ]
The primary objective is limited to obtaining preliminary estimates of Nrf2 pathway modulation from buccal cell specimens samples all collected during each of the three 5 day intervention periods. Endpoints include mRNA transcript levels of certain genes or enzymes regulated by Nrf2.
Note that the goals of this study are limited to obtaining initial pharmacodynamic estimates of Nrf2 pathway modulation for each BSE intervention. Accordingly, no hypothesis testing or comparative analyses are planned. The data collected in this pilot study may be used to plan a future definitive prevention trial.
- Estimate modulation of Nrf2 pathway markers in PBMCs and metabolites of SFN in urine [ Time Frame: Three to 11 weeks ]Individual subjects profile plots will be constructed for each endpoint as measured at various times over days 1-5 of each regimen will be plotted. An omnibus test of change over time such as the Friedman test of Mack-Skillings test will be conducted to verify general endpoint modulation. Regimen-specific profiles will be estimated with mixed linear or generalized mixed linear models
|Study Start Date:||March 2014|
|Study Completion Date:||January 2015|
|Primary Completion Date:||April 2014 (Final data collection date for primary outcome measure)|
Experimental: Broccoli Sprout Extract Drink
Three different regimens of BSE delivery will be evaluated in each participant, with participants serving as their own controls. Each regimen will involve a 3 day exposure, with daily collection of buccal cell scrapings. Between regimens, a minimum 3 day (72 hour) washout period will occur.
Drug: Broccoli Sprout Extract (BSE)
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Please refer to this study by its ClinicalTrials.gov identifier: NCT02023931
|United States, Pennsylvania|
|Eye and Ear Institute|
|Pittsburgh, Pennsylvania, United States, 15213|
|UPMC Hillman Cancer Center (University of Pittsburgh Cancer Institute)|
|Pittsburgh, Pennsylvania, United States, 15232|
|Principal Investigator:||Julie E Bauman, MD||University ofPittsburgh|