Activation of STAT3 promoting immunosuppressive effect on T cells in MDSCs of breast cancer / 中国肿瘤临床
Chinese Journal of Clinical Oncology
;
(24): 1016-1019, 2013.
Artículo
en Chino
| WPRIM
| ID: wpr-438252
ABSTRACT
Objective:
To explore the status of STAT3 phosphorylation in myeloid-derived suppressor cells (MDSCs) of breast cancer and its function in the immunosuppressive effect of MDSCs on proliferation and cytokine secretion of T cells.Methods:
CCD33+cells were isolated from healthy umbilical cord, blood-derived, peripheral blood mononuclear cells and were co-cultured with breast cancer cell line MDA-MB-231 in vitro using Transwell plates to induce MDSCs. The untreated CD33+cells were used as con-trols. Idoxuridine (IDO) suppressor expression and STAT3 phosphorylation were examined using Western blot assay. The proliferation and cytokine secretion of T cells, which were co-cultured with MDSCs, were determined by methyl thiazol tetrazolium assay and en-zyme-linked immunosorbent assay. 1-MT and JSI-124 were used to investigate the function of IDO and pSTAT3 in MDSC-mediated T cell immunosuppression.Results:
The protein levels of IDO and pSTAT3 in MDSCs were significantly upregulated. MDSCs obviously suppressed T-cell proliferation, which was reversed by 1-MT or JSI-124 (P<0.05). MDSCs could promote TGF-βand IL-10 secretions, but could also remarkably inhibit IFN-γsecretion (P<0.05). After incubation with 1-MT or JSI-124, the increase in TGF-βand IL-10, as well as the decrease in IFN-γ, was significantly reversed.Conclusion:
The upregulated pSTAT3 induced the IDO increase in MDSCs. JSI-124 can block MDSC-mediated immunosuppressive effect on T cells in breast cancer.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Idioma:
Chino
Revista:
Chinese Journal of Clinical Oncology
Año:
2013
Tipo del documento:
Artículo
Similares
MEDLINE
...
LILACS
LIS