Misonidazole is a multifaceted agent exhibiting various bioactivities. It has a partition coefficient (LogP) of -0.37, indicating low lipophilicity, and shows very low capillary permeability in rat brain (Pc = 0.00001 cm s-1). The compound demonstrates significant cytotoxicity with an IC50 of 12.1 µM against aerobic AA8 cells and exhibits enhanced sensitivity to hypoxic conditions, as indicated by a CT10 value of 8.3 mM-hr and a ratio of aerobic to hypoxic CT10 of 25.0. It also enhances radiation sensitivity in AA8 cells, with a sensitization enhancement ratio (SER) of 1.6 at a concentration of 0.3 mM under hypoxia.
Additionally, Misonidazole shows moderate cytotoxic activity in other cell lines, including a hypersensitivity factor of 1.4 against UV4 cells, 3.6 against EMT6 cells, and 1.9 against FME cells. It has a maximum tolerated dose of 5.0 µM/kg in mice and exhibits antiviral activity against SARS-CoV-2 by inhibiting virus-induced cytotoxicity in cells. The compound also demonstrates inhibitory effects in enzymatic assays of human HDAC6, with inhibition percentages of around 2.38%.
Furthermore, the compound shows antibacterial and antifungal activity against a range of pathogens, including Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Acinetobacter baumannii, and Candida albicans. It shows low chronic aerobic cytotoxicity with a cytotoxicity value of 0.0013 M in Chinese hamster lung fibroblast-like cells and moderate acute toxicity with a value of 0.03 M after 2 hours of exposure.
In summary, Misonidazole is characterized by its diverse bioactivities, including cytotoxic, radiosensitizing, antiviral, antibacterial, and enzymatic inhibitory properties. Its low partition coefficient and capillary permeability limit its central nervous system penetration, while its various IC50, CT10, and SER values highlight its potential therapeutic applications under both aerobic and hypoxic conditions..
Note: Summary generated by AI. Data source: ChEMBL 