Natural killer cell-mediated anticancer effects of an arabinogalactan derived from rice hull in CT26 colon cancer-bearing mice.

Abstract:

:Rice hull polysaccharides (RHPS) have been reported to activate innate immunity in mice. This study investigated the effects of RHPS on natural killer (NK) cell-mediated cytotoxicity in vitro and the possible underlying anticancer mechanisms in vivo. The results showed that sustained exposure to RHPS increased NK-92MI cell-mediated cytotoxicity in a time- and concentration-dependent manner. In addition, RHPS upregulated the expression of Fas ligand, TNF-related apoptosis-inducing ligand, perforin, and granzyme B of NK-92MI cells and induced the secretion of IFN-γ and TNF-α. In the in vivo experiment, colon cancer CT26-bearing mice were used to investigate the effects of RHPS in cytotoxicity and anticancer. The results revealed that RHPS inhibited cancer weight and volume in CT26-bearing mice and significantly upregulated splenic cytotoxicity and NK-cell population. Moreover, RHPS treatment increased NK-cell infiltration in tumors. Thus, RHPS can enhance NK-cell activation in vivo and in vitro, thereby exhibiting anticancer activity.

journal_name

Int J Biol Macromol

authors

Yang LC,Lai CY,Hsieh CC,Lin WC

doi

10.1016/j.ijbiomac.2018.11.200

subject

Has Abstract

pub_date

2019-03-01 00:00:00

pages

368-376

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(18)34340-X

journal_volume

124

pub_type

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