The 50 μl reaction mixture contained 45 μl DEPC-H2O, 1.0 μl cDNA (1:100 dilution), 2.0 μl (10 μM) of each primer and freeze-dried powder of the

AccuPower Greenstar® qPCR premix. The thermal cycle profile for PCR was as follows: 94°C for 5 min, 40 cycles of PCR (94°C for 30 sec; 55°C for 30 sec; 72°C for 30 sec). The fluorescence was digitally collected after each cycle of 72°C for 30 sec. After PCR, the samples were subjected to a temperature ramp with continuous fluorescence monitoring for melting curve analysis. BIONEER Exicycler™ analysis selleck chemicals llc software (Bioneer Corp., Daejeon, Korea) was used to obtain the Ct values. 2-ΔΔ CT method [16] was used to analyze the relative expression of each TLR in MDA-MB-231. TLRs protein expression analysis To detect the cell protein expression of TLRs, 106 cultured MDA-MB-231 were prefixed and permeabilized. Then, the cells were BTSA1 cell line stained with 3 μl purified anti-human TLR4 antibody (Santa Cruz Biotechnology, CA, USA)

at 4°C for 30 min away from light. After washing I-BET151 datasheet twice with 1×PBS, the cells were incubated with 2 μl PE-conjugated goat anti-rabbit IgG mAb (Santa Cruz Biotechnology) at 4°C for 30 min away from light, followed by an additional two washes with 1×PBS. Finally, the stained cells in 500 μl 1×PBS were analyzed Thiamet G by using a flow cytometer (FACScalibur; Becton Dickinson (BD), NJ, USA), and the data were processed with BD CellQuest software. The negative control

was performed by omitting the anti TLR4 antibody. Immunofluorescence analysis Cells cultured overnight were fixed with alcohol for 30 min and blocked in 1×PBS (pH 7.4) solution with 3% BSA overnight at 4°C in a hydrated box. Anti-TLR4 antibody was added at a 1:100 dilution (Santa Cruz Biotechnology) and allowed to incubate overnight at 4°C in a hydrated box. After washing three times, fluorescent secondary antibody (Santa Cruz Biotechnology) was added at a 1:100 dilution. The cells were again washed three times with 1×PBS, and counter-stained with DAPI. Fluorescence was analyzed by fluorescence microscope (DMI4000B; Leica, IL, USA). Adobe Photoshop 9.0 software (CA, USA) was used for subsequent image processing. RNA interference Cells were transiently transfected with a GFP expressing plasmid pGsil-1 (Genesil, Wuhan, China) containing silencing RNA (siRNA) directed against TLR4. The three pieces of small interfering oligonucleotide specific for human TLR4 have been listed in Table 2 . Briefly, 2×105 cells were seeded in 6-well dishes and cultured overnight until 60% to 70% confluency was reached. Transfections were performed using Lipofectamine™ 2000 reagent (Invitrogen) per the manufacturer’s instructions.