Abstract Title:

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

Abstract Source:

Int Immunopharmacol. 2009 May;9(5):620-6. Epub 2009 Feb 26. PMID: 19249389

Abstract Author(s):

Yuki Masuda, Munechika Inoue, Ayu Miyata, Shigeto Mizuno, Hiroaki Nanba


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.

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