MDL-860 is a 5-nitro-2-phenoxybenzonitrile that exerts broad-spectrum antipicornaviral activity (MIC50 from 0.1-1.5 μg/mL in HeLa cultures) by acting as an irreversible inhibitor against host phosphatidylinositol-4 kinase beta (PI4KB; PtdIns 4-kinase beta; PI4Kbeta; NPIK; PI4K92) via covalent modification of Cys646 located at the bottom of a surface pocket apart from the PI4KB active site. MCL-860 (MIC50 from 0.1-1.5 μg/mL in HeLa cultures). A pleconaril/MDL-860/oxoglaucine consecutive alternating administration (CAA), but not simultaneous daily treatment, is reported to be effective against coxsackievirus B1 infection without the development of drug resistance in newborn mice (75 mg/kg MDL-860 via s.c. every third day on the day following pleconaril and prior to oxoglaucine).
Phosphatidylinositol 4-kinase Beta (PI4KB) inhibitor with broad-spectrum antipicornavirus activity.
Antimicrobial agents and chemotherapy, 22(4), 635-638 (1982-10-01)
A nitrobenzene derivative, MDL-860, was found to inhibit plaque formation, cytopathic effect, or both in 11 of 12 picornaviruses at concentrations which did not affect cell growth. The compound did not directly inactivate the virus. MDL-860 inhibited actinomycin D-resistant [3H]uridine
MDL-860 is a broad-spectrum antipicornavirus compound discovered in 1982 and one of the few promising candidates effective in in vivo virus infection. Despite the effectiveness, the target and the mechanism of action of MDL-860 remain unknown. Here, we have characterized
Antimicrobial agents and chemotherapy, 22(4), 639-642 (1982-10-01)
The newly synthesized compound 2-(3,4-dichlorophenoxy)-5-nitrobenzonitrile (MDL-860) has been found to inhibit picornavirus replication. In multiple growth cycle experiments, 1 microgram of MDL-860 per ml caused a reduction in virus yield of at least 1.0 log10 50% tissue culture infectious doses
