RESUMO
Objective To compare the pharmacodynamic effects of Scutellaria baicalensis pith-nodecayed and S. baicalensis pith-decayed on pneumonia. Methods The minimal inhibitory concentration (MIC) of S. baicalensis pith-nodecayed and S. baicalensis pith-decayed on Streptococcus pneumoniae was determined by in vitro experiments with double dilution method. In vivo experiments, taking pneumonia rat as model, body temperature and lung weight coefficient, blood test and pathological section of lung in rats were used as evaluation index to evaluate the pharmacodynamic difference of the effect of S. baicalensis pith-nodecayed and S. baicalensis pith-decayed on pneumonia rats. S. baicalensis pith-nodecayed and S. baicalensis pith-decayed antibacterial activity and pathological indicators were analyzed with PLS-DA. Results The MIC of S. baicalensis pith-nodecayed to Streptococcus pneumoniae was 0.5 g/mL, and the MIC of S. baicalensis pith-decayed to Streptococcus pneumoniae was 0.25 g/mL. Both S.baicalensis pith-nodecayed and S. baicalensis pith-decayed could significantly reduce the inhibitory concentration body temperature, lung weight coefficient, white blood cell count, neutrophil number, and lymphocyte number in whole blood. PLS-DA showed that there were significant differences in the pharmacological effects of S. baicalensis pith-nodecayed and S. baicalensis pith-decayed. Conclusion S. baicalensis pith-nodecayed and S. baicalensis pith-decayed have a certain effect on the treatment of pneumonia, the role of the strength of the two have significant differences, the role of S. baicalensis pith-decayed is better.