alexa Maitake beta-glucan enhances therapeutic effect and reduces myelosupression and nephrotoxicity of cisplatin in mice.


Journal of Integrative Oncology

Author(s): Masuda Y, Inoue M, Miyata A, Mizuno S, Nanba H, Masuda Y, Inoue M, Miyata A, Mizuno S, Nanba H, Masuda Y, Inoue M, Miyata A, Mizuno S, Nanba H, Masuda Y, Inoue M, Miyata A, Mizuno S, Nanba H

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Abstract Cisplatin is broadly used clinically as an anticancer drug. Despite its significant anticancer activity, cisplatin-induced nephrotoxicity and myelosuppression limit its use. MD-Fraction is glucan purified from maitake (Grifola frondosa), which has beta-1, 6-main chain with beta-1, 3-branches, has been reported to exhibit antitumor and antimetastatic activities by enhancing the immune system. In this study, we demonstrate that MD-Fraction in combination with cisplatin significantly enhanced antitumor and antimetastatic activity compared to cisplatin alone. MD-Fraction reduced decreases in body weight, spleen weight and the number of immunocompetent cells such as macrophages, DCs and NK cells in cisplatin-treated mice. MD-Fraction also induced IL-12p70 production by splenocytes, resulting in increased NK cell activity in cisplatin-treated mice. MD-Fraction significantly increased the mRNA expression of GM-CSF, G-CSF, M-CSF, IFN-gamma, IL-12 p40 in splenocytes and reduced the decrease in the number of CFU-GM colonies in cisplatin-treated bone marrow. These facts suggest that MD-Fraction can reduce cisplatin-induced myelosuppression. Moreover, treatment with MD-Fraction significantly reduced cisplatin-induced nephrotoxicity accompanied by increases in serum creatinine level, necrosis and apoptosis of renal tubular cells. These results suggest that MD-Fraction in combination with cisplatin cannot only enhance antitumor and antimentastatic acitivity, but also reduce cisplatin-induced myelotoxicity and nephrotoxicity. This article was published in Int Immunopharmacol and referenced in Journal of Integrative Oncology

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