TY - JOUR
T1 - Regulatory effect of astragalus polysaccharides on intestinal intraepithelial γδT cells of tumor bearing mice
AU - Sun, Shuyu
AU - Zheng, Kang
AU - Zhao, Hongyan
AU - Lu, Cheng
AU - Liu, Biao
AU - Yu, Changyuan
AU - ZHANG, Ge
AU - BIAN, Zhaoxiang
AU - LYU, Aiping
AU - He, Xiaojuan
N1 - Publisher Copyright:
© 2014 by the authors; licensee MDPI, Basel, Switzerland.
PY - 2014/9/23
Y1 - 2014/9/23
N2 - Astragalus polysaccharides (APS) possess multiple immunomodulatory activities. Due to its high molecular weight, orally administration of APS is not easily absorbed into the blood stream, and how APS exerts its capacity in vivo is still not well elucidated. We assume that enteric mucosal immune response might trigger the immune regulation of APS, and our previous studies demonstrated that APS had regulatory activity on intraepithelial lymphocytes (IELs). Therefore, this study aimed to investigate the functions of APS on intestinal intraepithelial γδT cells, a major subset in IELs and an essential component of maintaining homeostasis and immune regulation in enteric mucosa. Results showed that APS could promote proliferation and function of intestinal intraepithelial γδT cells in vitro, the IFN-γ, FasL and GrB mRNA levels in γδT cells were all significantly increased. Moreover, APS also improved the activity of intestinal intraepithelial γδT cells in vivo, as cytokines production and cytotoxicity of γδT cells were all remarkably improved in tumor-bearing mice treated with APS. In addition, the levels of TNF-α and IFN-γ were significantly increased, whereas the levels of IL-10 and TGF-β were significantly decreased in tumor-bearing mice treated with APS. In conclusion, this study demonstrated that APS could improve proliferation and function of intestinal intraepithelial γδT cells, which might an important pathway for immunomodulation of APS in cancer therapy.
AB - Astragalus polysaccharides (APS) possess multiple immunomodulatory activities. Due to its high molecular weight, orally administration of APS is not easily absorbed into the blood stream, and how APS exerts its capacity in vivo is still not well elucidated. We assume that enteric mucosal immune response might trigger the immune regulation of APS, and our previous studies demonstrated that APS had regulatory activity on intraepithelial lymphocytes (IELs). Therefore, this study aimed to investigate the functions of APS on intestinal intraepithelial γδT cells, a major subset in IELs and an essential component of maintaining homeostasis and immune regulation in enteric mucosa. Results showed that APS could promote proliferation and function of intestinal intraepithelial γδT cells in vitro, the IFN-γ, FasL and GrB mRNA levels in γδT cells were all significantly increased. Moreover, APS also improved the activity of intestinal intraepithelial γδT cells in vivo, as cytokines production and cytotoxicity of γδT cells were all remarkably improved in tumor-bearing mice treated with APS. In addition, the levels of TNF-α and IFN-γ were significantly increased, whereas the levels of IL-10 and TGF-β were significantly decreased in tumor-bearing mice treated with APS. In conclusion, this study demonstrated that APS could improve proliferation and function of intestinal intraepithelial γδT cells, which might an important pathway for immunomodulation of APS in cancer therapy.
KW - Astragalus polysaccharides
KW - Enteric mucosa
KW - Tumor
KW - γδT cells
UR - http://www.scopus.com/inward/record.url?scp=84907916722&partnerID=8YFLogxK
U2 - 10.3390/molecules190915224
DO - 10.3390/molecules190915224
M3 - Journal article
C2 - 25251192
AN - SCOPUS:84907916722
SN - 1420-3049
VL - 19
SP - 15224
EP - 15236
JO - Molecules
JF - Molecules
IS - 9
ER -