Expression of iNOS and arginase-1 in BMDMs after LPS stimulation.

<p>(A) PLT-BMDMs and control BMDMs (2.5 × 10⁶ cells) were stimulated with LPS (50 ng/mL) for 24 h, and the gene expressions of <i>Nos2</i> and <i>Arg1</i> were analyzed by RT-qPCR with the relative standard curve method using <i>Gapdh</i> as an internal control. The gene expression is represented as the value relative to gene expression in the original BMDMs. Experiments were performed in quintuplicate and repeated four times. The data are presented as the mean ± SEM. ***p < 0.005 vs. control BMDMs. Representative results of the four experiments are shown. (B) PLT-BMDMs and control BMDMs (2.5 × 10⁶ cells) were stimulated with LPS (50 ng/mL) for 0–24 h. Cells were then lysed in 1 × SDS sample buffer, and the cell lysates were subjected to western blotting analysis with antibodies against iNOS, arginase-1 or GAPDH. The relative intensity of each iNOS or arginase-1 band after normalization to the levels for GAPDH is shown in the lower panel. Experiments were repeated four times, and representative results are shown. (C) PLT-BMDMs and control BMDMs (2.5 × 10⁶ cells) were stimulated with zymosan (25 or 100 μg/mL) for 12 h, and then cell lysates were subjected to western blotting analysis with antibodies against iNOS, arginase-1 or GAPDH. <i>C</i>, control BMDMs; <i>P</i>, PLT-BMDMs. The relative intensity of each iNOS or arginase-1 band after normalization to the levels for GAPDH is shown in the lower panel. Experiments were repeated four times, and representative results are shown.