Journal: Oncology Letters
Article Title: Cancer-associated fibroblast-derived CCL5 contributes to cisplatin resistance in A549 NSCLC cells partially through upregulation of lncRNA HOTAIR expression
doi: 10.3892/ol.2021.12957
Figure Lengend Snippet: CAFs secrete elevated CCL5 to promote cell viability in NSCLC cancer cells via paracrine activation. (A) mRNA expression levels of CCL5 in CAFs, NFs and two NSCLC cell lines by RT-qPCR using GAPDH gene as the internal control. (B) CCL5 in conditioned medium secreted by NFs and CAFs were quantified by ELISA. *P<0.05, ***P<0.001 and ****P<0.0001 vs. CAFs. (C) A549 and H1299 cancer cells were incubated with CAF-CM or NF-CM in combination with anti-CCL5 antibody (0.1 µg/ml) for 6 h followed by treatment with DDP for 48 h. Cell viability was determined by the MTT assay. (D) mRNA expression levels of CCL5 and CCR5 in NSCLC cell lines cultured with CAF-CM were assessed by RT-qPCR using GAPDH gene as the normalization control. (E) A549 and H1299 cancer cells were incubated with CAF-CM or NF-CM in combination with CCR5 inhibitor (Met-RANTES; 0.1 µg/ml) for 6 h followed by treatment with DDP for 48 h. Cell viability was determined by the MTT assay. *P<0.05, **P<0.01 and ***P<0.001 vs. control; # P<0.05 and ## P<0.01 vs. DDP; && P<0.01 vs. CAF-CM and DDP. Results were expressed as the mean ± SD, and the means were calculated from ≥3 independent experiments. RT-qPCR, reverse transcription-quantitative PCR; CAF, cancer-associated fibroblast; NF, normal fibroblast; CM, conditioned medium; DDP, cisplatin; CCL5, C-C motif chemokine ligand 5; CCR5, C-C motif chemokine receptor 5; NSCLC, non-small cell lung cancer.
Article Snippet: For cell treatment, cancer cells were incubated with CAF-CM or NF-CM in combination with either anti-CCL5 antibody (0.1 μg/ml; cat. no. MAB678-SP; R&D Systems, Inc.), CCR5 antagonist (Met-RANTES; 0.1 μg/ml; cat. no. 335-RM-025; R&D Systems, Inc.) or recombinant human CCL5 (3 ng/ml; cat. no. 300-06; PeproTech, Inc.) for 6 h, followed by treatment with 50 μM DDP (Sigma-Aldrich; Merck KGaA) in the presence of CM for another 48 h.
Techniques: Activation Assay, Expressing, Quantitative RT-PCR, Control, Enzyme-linked Immunosorbent Assay, Incubation, MTT Assay, Cell Culture, Reverse Transcription, Real-time Polymerase Chain Reaction