Effect of ribavirin on subacute sclerosing panencephalitis virus infections in hamsters.
The antiviral activity of ribavirin was studied in hamsters infected with subacute sclerosing panencephalitis (SSPE) virus. Ribavirn did not improve the survival of infected hamsters when administered intraperitoneally at the maximal nonlethal dose of 50 mg/kg/day for 10 days. However, when administered intracranially, ribavirin improved the survival of infected hamsters in a dose-dependent manner. The 50% effective dose was calculated to be 1.4 mg/kg/day, and the selectivity index, based on the ratio of the 50% lethally toxic dose (31 mg/kg/day) to the 50% effective dose, was 22. When begun 12 h, but not 36 h, postinfection, ribavirin at a dose of 10 mg/kg/day completely prevented mortality and inhibited the replication of SSPE virus in brains of infected hamsters. Intrathecal or intraventricular administration of ribavirin should be explored for potential use in the treatment of patients with SSPE.
Department of Pediatrics, Fukushima Medical College, Japan.
Y
Y
Honda
M
M
Hosoya
T
T
Ishii
S
S
Shigeta
H
H
Suzuki
D000818:Animals; D001921:Brain / Q000382:microbiology / Q000473:pathology; D006224:Cricetinae; D004305:Dose-Response Relationship, Drug; D007267:Injections; D007274:Injections, Intraperitoneal; D008647:Mesocricetus; D012254:Ribavirin / Q000008:administration & dosage / Q000627:therapeutic use* / Q000633:toxicity; D013190:SSPE Virus / Q000187:drug effects / Q000502:physiology; D013344:Subacute Sclerosing Panencephalitis / Q000188:drug therapy* / Q000382:microbiology; D014779:Virus Replication / Q000187:drug effects
D012254:Ribavirin