Intracellular cytokine staining followed by flow cytometry was performed on splenocytes and lymphocytes isolated from mouse lungs as described above. All reagents were obtained from BD Pharmingen (San Diego, CA). Following 18hrs of stimulation, GolgiPlug was added to all wells. At 24hrs cells were collected for staining. Following CD16/CD32 blocking with Fc Block, cell surfaces were stained with PE conjugated α-mouse CD4 antibody, clone RM4-5 and PerCP conjugated α-mouse CD8 antibody, clone 53-6.7. Cells were fixed and permeabilized with Cytofix/Cytoperm and stained intracellularly with APC conjugated α-mouse IFN-γ antibody, clone XMG1.2 and FITC conjugated α-mouse IL-17a, clone eBiol7B7 (eBioscience, San Diego, CA). Cells were analyzed using a
BD FACSCalibur and data was analyzed using FlowJo (FlowJo, LLC, Ashland, OR). The supernatant of the same samples was analyzed by enzyme-linked immunosorbent assay (ELISA) for IFN-γ levels using the
Mouse IFN-γ ELISA MAX™ Deluxe kit following the manufacturer's instructions (Biolegend, San Diego, CA). Readings were acquired and analyzed with
SoftMax Pro software (Molecular Devices, Sunnyvale, CA).
Marcus S.A., Steinberg H, & Talaat A.M. (2015). Protection by novel vaccine candidates, Mycobacterium tuberculosis ΔmosR and ΔechA7, against challenge with a Mycobacterium tuberculosis Beijing strain. Vaccine, 33(42), 5633-5639.