1. Immunomodulatory effects of astragalus polysaccharide on human peripheral blood mononuclear cells co-cultured with cervical cancer cell line
- Author
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Shokati, Elham, Shokri, Mohammad-Reza, Entezami, Kobra, Khorrami, Samaneh, Amani, Mona, Motallebnezhad, Morteza, and Safari, Elahe
- Subjects
Polysaccharides ,Immunity ,Leukocytes, Mononuclear ,Tumor Microenvironment ,Humans ,Uterine Cervical Neoplasms ,Female ,Coculture Techniques ,Cell Proliferation ,HeLa Cells - Abstract
To investigate immunomodulatory effects of Astragalus polysaccharides (APS) on the co-culture of peripheral blood mononuclear cells (PBMCs) with HeLa cervical cancer cell line.To assess the proliferation of PBMCs, carboxyfluorescein succinimidyl ester (CFSE)-labeled PBMCs were co-cultured with HeLa cells and treated with different concentrations of APS. Supernatants of cell culture were collected for cytokines assay via enzyme-linked immunosorbent assay (ELISA). The impact of APS on the proliferation of PBMCs, induction of regulatory T cells (Tregs), and myeloid-derived suppressor cells (MDSCs) was carried out by flow cytometry.It was observed that APS could increase the proliferation of PBMCs co-cultured with HeLa cells (P0.05). However, APS had no significant effects on the induction of Tregs and MDSCs in the co-culture assay (P0.05). Furthermore, ELISA results demonstrated that APS could decrease IL-10 and TGF-β concentration (P0.05).The above-mentioned characteristics showed that APS might be able to modulate immune responses and improve anti-tumor effects through increasing the proliferation of PBMCs and decreasing inhibitory cytokines secretion as critical mediators of immune suppression in the tumor microenvironment.
- Published
- 2021