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Published in: Cancer Immunology, Immunotherapy 2/2015

Open Access 01-02-2015 | Original Article

Maitake mushroom extract in myelodysplastic syndromes (MDS): a phase II study

Authors: Kathleen M. Wesa, Susanna Cunningham-Rundles, Virginia M. Klimek, Emily Vertosick, Marci I. Coleton, K. Simon Yeung, Hong Lin, Stephen Nimer, Barrie R. Cassileth

Published in: Cancer Immunology, Immunotherapy | Issue 2/2015

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Abstract

Background

Myelodysplastic syndromes (MDS) are characterized by ineffective erythropoiesis with dysplastic bone marrow leading to peripheral cytopenia, risk of infection, and progression to acute myelogenous leukemia. Maitake mushroom beta-glucan, a dietary supplement, stimulates hematopoietic progenitor cell differentiation, granulocyte colony-stimulating factor production, and recovery of peripheral blood leukocytes after bone marrow injury. This phase II trial examined the effects of Maitake on innate immune function in MDS.

Methods

Myelodysplastic syndromes patients with International Prognostic Scoring System Low- and Intermediate-1-risk disease received oral Maitake extract at 3 mg/kg twice daily for 12 weeks. Primary endpoints included neutrophil count and function tested as endogenous or stimulated neutrophil production of reactive oxygen species (ROS) by flow cytometry compared with age-matched healthy controls (HC). ROS activators were Escherichia coli, phorbol ester, and the bacterial peptide N-formylmethionyl-leucyl-phenylalanine (fMLP). Complete blood counts, chemistry panels, iron studies, and monocyte function were evaluated.

Results

Of 21 patients enrolled, 18 completed the study and were evaluable. Maitake increased endogenous (basal) neutrophil (p = 0.005) and monocyte function (p = 0.021). Pre-treatment monocyte response to E. coli was reduced in MDS patients compared with HC (p = 0.002) and increased (p = 0.0004) after treatment. fMLP-stimulated ROS production response also increased (p = 0.03). Asymptomatic eosinophilia occurred in 4 patients (p = 0.014). Other changes in albumin, hemoglobin, and total protein were not clinically relevant.

Conclusions

Maitake was well tolerated. Enhanced in vitro neutrophil and monocyte function following treatment demonstrate that Maitake has beneficial immunomodulatory potential in MDS. Further study is warranted.
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Metadata
Title
Maitake mushroom extract in myelodysplastic syndromes (MDS): a phase II study
Authors
Kathleen M. Wesa
Susanna Cunningham-Rundles
Virginia M. Klimek
Emily Vertosick
Marci I. Coleton
K. Simon Yeung
Hong Lin
Stephen Nimer
Barrie R. Cassileth
Publication date
01-02-2015
Publisher
Springer Berlin Heidelberg
Published in
Cancer Immunology, Immunotherapy / Issue 2/2015
Print ISSN: 0340-7004
Electronic ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-014-1628-6

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