About this trial
This phase II trial tests how well Reishi mushroom extract works in treating fatigue and/or joint/muscle pain (arthralgias/myalgias) in patients with breast cancer on aromatase inhibitors. Fatigue and arthralgias/myalgias are common symptoms in breast cancer patients taking aromatase inhibitors (AI). Given the long duration of AI treatment for some women (up to 10 years), these symptoms can significantly impact quality of life and premature discontinuation of AIs, a beneficial medication. Reishi mushrooms are among several medicinal mushrooms that have been used for hundreds of years, mainly in Asian countries, to help enhance the immune system, reduce stress, improve sleep, and lessen fatigue. Reishi mushroom extracts have not been studied explicitly for treatment-induced arthralgias/myalgias, but have been shown to improve quality of life, muscular strength, pain, and flexibility. Information from this study may help researchers determine the effect of Reishi mushroom extract on fatigue and arthralgias/myalgias in breast cancer patients receiving an AI.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Age ≥ 18 years
History of breast cancer, estrogen receptor positive (ER+), Her 2 positive or negative
Fatigue ≥ 4/10
Currently post-menopausal (as defined by National Comprehensive Cancer Network (version 4.2024), taking any aromatase inhibitor in the curative setting and planning to be on such for at least 8 weeks after registration. [Patients on concurrent ovarian suppression (such as with leuprolide acetate, goserelin) are allowed]; CDK 4/6 inhibitors abemaciclib, ribociclib ARE allowed
Disqualifiers
Other known uncontrolled medical conditions causing fatigue such as untreated thyroid disease, depression, fibromyalgia, chronic fatigue syndrome, infection, autoimmune disease, or active/untreated hepatitis
Allergy to mushrooms
On anticoagulation medication or aspirin or having a known bleeding disorder
On any specific medication for fatigue (e.g., methylphenidate)
Trial design
Crossover
Treatments tested in this trial
Mushroom Extract
Dietary supplementGiven Reishi mushroom extract PO
Placebo Administration
DrugGiven PO
Quality-of-Life Assessment
Other interventionAncillary studies
Questionnaire Administration
Other interventionAncillary studies
Treatment groups
Trial outcomes
Primary outcomes
Change in fatigue scores
Based on a single item fatigue uniscale question. Will be compared between arms using a two-sided two-sample t-test assuming equal variances in each group.
Secondary outcomes
Change in quality of life
Measured by the World Health Organization-Five Well-Being Index. Will be compared between arms using two-sample, two-sided t-tests assuming equal variances and alpha levels of 5%. The analyses of the crossover portion of the study will be descriptive. Mean values will be plotted over time by arm. A formal crossover analysis will also be performed using Senn's linear modeling approach.
Change in arthralgias
Measured by the Brief Pain Inventory for Aromatase Inhibitor Induced Arthralgia. Will be compared between arms using two-sample, two-sided t-tests assuming equal variances and alpha levels of 5%. The analyses of the crossover portion of the study will be descriptive. Mean values will be plotted over time by arm. A formal crossover analysis will also be performed using Senn's linear modeling approach.
Incidence of adverse events
Measured by the symptom experience diary. Will be compared between arms using two-sample, two-sided t-tests assuming equal variances and alpha levels of 5%. The analyses of the crossover portion of the study will be descriptive. Mean values will be plotted over time by arm. A formal crossover analysis will also be performed using Senn's linear modeling approach.
Sponsors and contacts
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