细胞实验: |
Cell lines: RAW macrophages Concentrations: 7, 28, or 56 μg/ml Incubation Time: -- Method: RAW macrophages were grown in Dulbecco modified Eagle medium containing l-glutamine and sodium pyruvate (PAA Laboratories) supplemented with 10% fetal bovine serum. About 2.5 × 104 cells were seeded into each well of a 48-well plate and were infected with green fluorescent protein (GFP)-expressing M. tuberculosis (MTB_NDT1) at a multiplicity of infection (MOI) of 10:1 for 4 h. After infection, the monolayers were washed three times with fresh medium to remove nonadherent bacteria and then exposed to fresh medium with or without isoniazid (0.75 μg/ml), faropenem (7, 28, or 56 μg/ml), or meropenem (5, 25, or 50 μg/ml) plus clavulanate (2.5 μg/ml). Medium (containing antibiotics) was changed every 24 h. At various time points, macrophages were washed once with 1× PBS and then lysed using 0.5% Triton X-100. The macrophage lysates were diluted in PBS containing 0.05% Tween 80, serial dilutions were plated on 7H10 agar, a |