Abstract:
OBJECTIVE:To explore the effect and mechanism of artesunate on γδ T cell-mediated antitumor immune responses against hepatoma carcinoma cells (HepG2) in vitro. METHODS:Human γδ T cells or HepG2 were respectively treated with artesunate, subjected to co-culture as appropriate, and the following assays were subsequently conducted: CCK8 to examine cell viability; LDH release assay to detect the killing effect of γδ T cells on HepG2 cells; flow cytometry to examine the expression of perforin (PFP) and granzyme B (GraB) of γδ T cells; ELISA to evaluate the levels of TGF-β1 and IL-10 in the collected supernatant of HepG2 cells pretreated with artesunate; and Western blot analysis to examine Fas, FasL, STAT3, p-STAT3 expression of HepG2 cells induced by artesunate. Results: The results showed that the cytotoxicity effect of γδ T cells pretreated with artesunate on HepG2 cells was augmented via elevating the expression of GraB in γδ T cells. Furthermore, treatment with artesunate reversed the inhibition of HepG2 cells on γδ T cells by reducing the secretion of TGF-β1 in HepG2 cells supernatant and enhanced the antitumor effect of γδ T cells against HepG2 cells through increasing the expression of Fas on HepG2 cells, which may be attributed to the inhibition of STAT3 signaling protein. CONCLUSION:Artesunate has several mechanisms for augmenting the antitumor immune responses mediated by γδ T cells. These results suggested artesunate may be an efficacious agent in the treatment of hepatocellular carcinoma.
journal_name
Immunopharmacol Immunotoxicoljournal_title
Immunopharmacology and immunotoxicologyauthors
Qian P,Zhang YW,Zhou ZH,Liu JQ,Yue SY,Guo XL,Sun LQ,Lv XT,Chen JQdoi
10.1080/08923973.2017.1386212subject
Has Abstractpub_date
2018-04-01 00:00:00pages
107-116issue
2eissn
0892-3973issn
1532-2513journal_volume
40pub_type
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