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Clinical Trial Summary

RATIONALE: White button mushroom extract may stop or delay the recurrence of breast cancer in postmenopausal breast cancer survivors.

PURPOSE: This phase I trial is studying the side effects and best dose of white button mushroom extract in preventing the recurrence of breast cancer in postmenopausal women who are breast cancer survivors.


Clinical Trial Description

OBJECTIVES:

Primary

- To show that a whole food extract of white button mushrooms (WBM) can inhibit aromatase-induced estrogen biosynthesis in postmenopausal women who are breast cancer survivors (BCS).

- To determine the optimal daily dose of WBM needed to induce aromatase inhibition of estrogen biosynthesis in these patients.

- To determine the bioavailability of C-18 unsaturated fatty acids, which are thought to moderate the anticancer effects of WBM.

Secondary

- To determine the safety and tolerability of WBM in humans via serial comprehensive symptom questionnaires, pre- and post-treatment markers of bone metabolism, and pre- and post-treatment comprehensive lipid panels.

- To explore potential alternate antitumor mechanisms, specifically the effect of WBM on cytokines as well as innate and adaptive cellular immunity.

- To describe barriers experienced in recruitment of ethnically diverse subjects from the community into a secondary prevention BCS trial utilizing a dietary supplement intervention in an effort to enhance feasibility of a subsequent phase II trial.

OUTLINE: This is a dose-escalation study.

Patients receive oral white button mushroom extract twice daily for 12 weeks in the absence of a second primary ductal carcinoma in situ, invasive breast cancer, or unacceptable toxicity.

Patients undergo blood and urine sample collection at baseline and periodically during treatment for pharmacokinetic, pharmacodynamic, and immunologic correlative studies. Blood and urine samples are analyzed for concentrations of C-18 unsaturated fatty acids (CUFA) by high-performance liquid chromatography tandem-mass spectrometry. Blood samples are also analyzed for anti-aromatase activity by ex vivo plasma aromatase inhibition assays; circulating sex steroid hormones by radioimmunoassay; serum immune cytokine levels by multiplex cytokine analyses; immunophenotyping, NK-cell activation status, and NK-cell function by multiparameter flow cytometry; lipid levels by lipid assays; and biochemical markers of bone metabolism by bone metabolism marker assays. DNA, RNA, and plasma samples are stored for post-trial pharmacogenomic studies. ;


Study Design

Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT00709020
Study type Interventional
Source City of Hope Medical Center
Contact
Status Completed
Phase Phase 1
Start date June 2008
Completion date December 2010

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