Published in:
Open Access
01-12-2018 | Research article
Anti-cancer activity of Angelica gigas by increasing immune response and stimulating natural killer and natural killer T cells
Authors:
Seo Hyun Kim, Sung Won Lee, Hyun Jung Park, Sang Hee Lee, Won Kyun Im, Young Dong Kim, Kyung Hee Kim, Sang Jae Park, Seokmann Hong, Sung Ho Jeon
Published in:
BMC Complementary Medicine and Therapies
|
Issue 1/2018
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Abstract
Background
The polysaccharide component of Angelica gigas induces immuno-stimulatory effects on innate immune cells. However, it is unclear whether A. gigas’ adjuvant activity on the immune system can elicit anti-cancer responses.
Methods
A water-soluble immuno-stimulatory component of A. gigas was prepared. How this ISAg modulated the activation of innate immune cells such as dendritic cells (DCs) was examined. ISAg-induced cytotoxic activity via natural killer (NK) and NKT cells was also tested using a tumor-bearing mouse model.
Results
ISAg treatment induced nitric oxide (NO) production and cytokine gene expression involved in innate immune responses. ISAg activated macrophages and DCs to secrete cytokine IL-12, through the TLR4 signaling pathway. IL-12 plays a crucial role in ISAg-mediated NK and NKT cell activation. Thus, the anti-cancer activity of NK and NKT cells induced ISAg-mediated cytotoxicity of B16 melanoma cells in mice.
Conclusions
These results indicated that the natural ingredient, ISAg, has adjuvant activity to induce strong anti-cancer activity of NK and NKT cells in vivo.