Study of the Activity and Toxicity of New Antibacterial Agents Based on Triindolylmethane Derivatives in vivo
Biological properties of new synthetic triindolylmethylium antibiotics of the triindolylmethane group, including compounds containing a maleimide fragment in the structure, are studied. Their high antibacterial activity in vitro, mainly against gram-positive bacteria, but also against strains with multiple drug resistance, was shown. The compounds, that showed the least in vitro toxicity on human donor fibroblasts PF-hTERT, were subjected to further testing in animals (mice). The LD<sub>50</sub> and LD<sub>10</sub> values identified were 24.2 and 16.9 mg/kg, respectively, for LCTA-2701 compound and 41.8 and 34.1 mg/kg for LCTA-2841 compound. In vivo testing of chimeric compounds showed their high efficiency in the model of staphylococcal sepsis in mice and a fairly good tolerability. ED<sub>50</sub> values were 1.09 mg/kg for LCTA-2701 compound and 18.27 mg/kg for LCTA-2841 compound, and their chemotherapeutic index was, respectively, 22.2 and 2.3.