Effects of black yeast-derived β-1,3-1,6-glucan on serum cytokine and microRNA expression in transplanted sarcoma in mice

Li,Wei; Zhang,Yaru; Cong,Fengsong

doi:10.3892/br.2012.30

Effects of black yeast-derived β-1,3-1,6-glucan on serum cytokine and microRNA expression in transplanted sarcoma in mice

Authors:
- Wei Li
- Yaru Zhang
- Fengsong Cong
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Affiliations: Key Laboratory of Systems Biomedicine, Ministry of Education, Shanghai Center for Systems Biomedicine, Shanghai Jiaotong University, Shanghai 200240, P.R. China , School of Life Sciences and Biotechnology, Shanghai Jiaotong University, Shanghai 200240, P.R. China
Published online on: October 25, 2012 https://doi.org/10.3892/br.2012.30
Pages: 139-143

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Abstract

β-1,3-1,6-glucans are the most abundant glucose polymers in the cell walls of fungi. Previous studies have shown that β-1,3-1,6-glucans derived from fungi possess immunomodulating activitivies. Antitumor effects of these compounds have also been reported in animal models. Current studies mainly focus on the direct effects of β-1,3-1,6-glucans on immune systems, but no data are available to address the underlying molecular events in tumor cells. β-1,3-1,6‑glucan purified from black yeast at 5 mg/100 g body weight (study group) or saline (control group) was intragastrically administered on a daily basis to subcutaneously‑injected mice with mouse S180 sarcoma cells. Tumor sizes, tumor weights, serum concentrations of cytokines and levels of microRNAs (miRNAs) in transplanted tumors were compared between the treated and control groups. The volumes and weights of transplanted tumors were significantly lower in the treatment groups compared to the control groups by ~150% and 70%, respectively. The treated mice demonstrated significantly higher levels of cytokines, including IL-2, IL-4, IL-6, IL-8, IL-10 and IL‑12, compared to the control mice. Notably, the expression of several miRNAs in transplanted tumor tissues also markedly changed. These data suggest that black yeast‑derived β-1,3‑1,6-glucan, not only stimulates cytokine release from immune cells, but also changes the expression profiles of miRNAs in transplanted tumors.

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