RRC ID 65467
Author Pang L, Han S, Jiao Y, Jiang S, He X, Li P.
Title Bu Fei Decoction attenuates the tumor associated macrophage stimulated proliferation, migration, invasion and immunosuppression of non-small cell lung cancer, partially via IL-10 and PD-L1 regulation.
Journal Int J Oncol
Abstract Macrophages play a pivotal role in tumor microenvironment. Bu-Fei Decoction (BFD) is a classical formula of traditional Chinese medicine (TCM) to alleviate lung cancer related symptoms, whether it has antitumor effect or could influence cancer microenvironment deserves further study. The aim of the present study was to examine the antitumor effect of BFD on non-small cell lung cancer (NSCLC), and to investigate the underlying mechanisms through tumor associated macrophages (TAMs). M2-polarized TAMs were induced by Phorbol 12-myristate 13-acetate (PMA) and interleukin 4 (IL-4). The antitumor activity of BFD in vitro was investigated in A549 and H1975 cells using MTT assay. The in vivo anticancer effect of BFD was evaluated in athymic nude mouse xenograft model. The invasive and migration properties of NSCLC cells were measured using Transwell. The protein expression was assessed using western blotting, ELISA and immunohistochemistry. The gene expression was examined using RT-PCR. TAMs was successfully established. Conditioned medium from TAMs increased cell proliferation, migration and invasion in NSCLC cells (p<0.05). BFD showed dose-dependent inhibitory effect on cell proliferation, migration and invasion abilities induced by TAMs. TAMs and rhIL-10 promoted the mRNA and protein expression of PD-L1 in NSCLC cells (p<0.01). Anti‑IL‑10 antibodies inhibited the elevated PD-L1 expression induced by TAMs. In vitro, the expression of PD-L1 and IL-10 was inhibited by BFD dose-dependently. In vivo, BFD suppressed A549 and H1975 tumor growth and decreased the expression of IL-10, PD-L1 and CD206. The results showed that TAMs play an important role in tumor progression of NSCLC, which was associated with tumor proliferation, migration, invasion and immunosuppression. Moreover, the antitumor mechanism of BFD is related to interruption of the link between TAMs and cancer cells by inhibiting the expression of IL-10 and PD-L1 in vitro and in vivo. Our results demonstrated BFD's potential as a novel treatment for NSCLC.
Volume 51(1)
Pages 25-38
Published 2017-7-1
DOI 10.3892/ijo.2017.4014
PMID 28534943
PMC PMC5467788
MeSH Animals Antineoplastic Agents / pharmacology Apoptosis / drug effects B7-H1 Antigen / metabolism* Carcinoma, Non-Small-Cell Lung / drug therapy Carcinoma, Non-Small-Cell Lung / immunology Carcinoma, Non-Small-Cell Lung / metabolism Carcinoma, Non-Small-Cell Lung / pathology* Cell Movement / drug effects Cell Proliferation / drug effects Drugs, Chinese Herbal / pharmacology* Female Gene Expression Regulation, Neoplastic / drug effects* Humans Immunosuppression Interleukin-10 / metabolism* Lung Neoplasms / drug therapy Lung Neoplasms / immunology Lung Neoplasms / metabolism Lung Neoplasms / pathology* Macrophages / drug effects Macrophages / immunology Macrophages / pathology* Mice Mice, Inbred BALB C Mice, Nude Neoplasm Invasiveness Signal Transduction Tumor Cells, Cultured Tumor Microenvironment Xenograft Model Antitumor Assays
Human and Animal Cells U-937 DE-4(RCB0435)