SiRNAs were procured through Ambion. SiRNA transfection reagent was purchased from Bio-Rad (USA). Cell Line Nucleofector Kit V was purchased from Amaxa Inc. USA. Cell culture The THP-1 human macrophage-like cell line was

acquired from the American Type Culture Collection, USA and cultured in RPMI-1640 medium containing 2 mM L-glutamine, 10 mM HEPES, 1 mM sodium pyruvate, 4.5 g/L glucose, 1.5 g/L sodium bicarbonate, supplemented with 10% heat inactivated fetal calf serum and 0.05 mM β-mercaptoethanol at 37°C, 5% CO2. Cells were selleckchem treated with 30 nM PMA for 24 h before using for the experiments. The J774A.1 murine macrophage cell line was maintained at 37°C, 5% CO2 CFTRinh-172 in DMEM containing 10% fetal calf serum, 2 mM glutamine and essential amino acids. Mycobacteria and macrophage Infection Mycobacterium tuberculosis H37Rv (Rv), Mycobacterium tuberculosis H37Ra (Ra), Mycobacterium bovis BCG (BCG) and Mycobacterium smegmatis MC2 155 (MS) were grown in Middlebrook (MB) 7H9

medium supplemented with 0.5% glycerol, Idasanutlin ADC supplement, 0.5% BSA, fraction V, 0.2% dextrose, 0.85% NaCl and 0.05% Tween 80. Cultures were incubated at 37°C. Mycobacteria grown in mid-log phase were used for infecting THP-1 cells. The bacterial suspension was washed and resuspended in RPMI-1640 containing 10% FCS. Bacterial clumps were disaggregated by vortexing five times (each cycle~2 min) Cepharanthine with 3-mm sterile glass beads, and then passed through 26 gauge needle 10 times to disaggregate any remaining clumps. The total number of bacilli per milliliter of suspension was ascertained by measuring OD at 650

nm and by further counting for cfu on MB7H10 agar plates. Infection and preparation of cell lysates for western blotting THP-1 cells were seeded at 2 × 106 cells/well in 6 well plates and were subsequently incubated with 20, mycobacteria/macrophage, for 4 h and lysed in phosphorylation buffer as described previously [18]. Alternatively, 2 × 106 peritoneal macrophages from BALB/c mouse were also infected with MS and Rv. Total 20 μg protein sample was analyzed by 10% SDS-PAGE and electroblotted as described previously [18]. Briefly, after blocking, the membranes were incubated overnight at 4°C with antibodies (anti PKC-α and anti PKCδ, 1:1000, anti pPKC-α and anti pPKCδ, 1:1000, anti tubulin, 1:5000, anti PknG, 1:1000) in 0.1% TBST containing 3% BSA, with gentle shaking. After four washes with 0.05% TBST, the membrane was incubated with goat anti-rabbit (anti-mouse when detecting tubulin) polyclonal antibodies conjugated to horseradish peroxidase (1:50000) in 0.1%TBST containing 3% BSA for 1 h at room temperature. After four washes with 0.05% TBST, the blots were developed using ECL reagents and were analyzed on Chemi-Doc XRS system (Bio-Rad Laboratories, Hercules, CA) using Quantity One program.