Journal
CARBOHYDRATE POLYMERS
Volume 111, Issue -, Pages 783-787Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.04.102
Keywords
Chitin oligosaccharide; Chitosan oligosaccharide; Tumor growth; Mice; Functional food; Colon-26
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The current study evaluated the anti-tumor activities of N-acetyl-D-glucosamine oligomer (NACOS) and glucosamine oligomer (COS) after their oral administration in a tumor (colon 26)-bearing mouse model. Compared to the control group, NACOS and COS groups showed significantly suppressed tumor growth, and apparent, marked apoptosis in tumor tissues. Furthermore, serum interleukin-12p70 and interferon-gamma levels significantly increased in the NACOS and COS groups compared to the corresponding levels in the control group. Collectively, the results indicate the oral administration of NACOS and COS could enhance innate immunity. Results of experiments in Myd-88 knockout mice revealed that the apparent effects were related to both Myd-88-dependent and Myd-88-independent pathways. The data indicated that oral administration of NACOS and COS produced anti-tumor effects through the induction of apoptosis and stimulation of the immune system, which suggests that NACOS and COS are candidate anti-tumor functional foods. (C) 2014 Elsevier Ltd. All rights reserved.
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