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International Journal of Medicinal Mushrooms
Fator do impacto: 1.423 FI de cinco anos: 1.525 SJR: 0.433 SNIP: 0.661 CiteScore™: 1.38

ISSN Imprimir: 1521-9437
ISSN On-line: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.v19.i4.50
pages 347-353

A King Bolete, Boletus edulis (Agaricomycetes), RNA Fraction Stimulates Proliferation and Cytotoxicity of Natural Killer Cells Against Myelogenous Leukemia Cells

Marta Kinga Lemieszek
Department of Medical Biology, Institute of Rural Health, Lublin, Poland
Fernando Herminio Ferreira Milheiro Nunes
Chemistry Research Centre, Chemistry Department, University of Trasos-Montes e Alto Douro, Vila Real, Portugal
Katarzyna Sawa-Wejksza
Department of Virology and Immunology, Maria Curie-Sklodowska University, Lublin, Poland
Wojciech Rzeski
Department of Medical Biology, Institute of Rural Health, Lublin, Poland; Department of Virology and Immunology, Maria Curie-Sklodowska University, Lublin, Poland


Numerous studies indicate the crucial role of natural killer (NK) cells in the prevention of tumor growth and inhibition of their metastasis, which suggests the possibility of their use in cancer treatment. This therapeutic strategy required finding a selective NK cell stimulator that, upon administration, did not disturb organism homeostasis, unlike natural activators (interleukin-2 or interleukin-12). Because the majority of anticancer agents derived from Basidiomycetes are able to stimulate lymphocytes, we describe the influence of Boletus edulis RNA on a human NK cell line (NK92). Our studies showed that a B. edulis RNA fraction was not toxic against NK92 cells. Furthermore, the tested fraction significantly stimulated NK92 cell proliferation and their cytotoxicity against tumor cells. We demonstrate here, to our knowledge for the first time, that B. edulis RNA enhances NK cell activity and possesses immunomodulatory potential.

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