PMID- 3129991 OWN - NLM STAT- MEDLINE DCOM- 19880603 LR - 20210526 IS - 0066-4804 (Print) IS - 1098-6596 (Electronic) IS - 0066-4804 (Linking) VI - 32 IP - 3 DP - 1988 Mar TI - In vitro and in vivo Phlebovirus inhibition by ribavirin. PG - 331-6 AB - Ribavirin (1-beta-D-ribofuranosyl-1,2,4-triazole-3-carboxamide) was markedly inhibitory in vitro to Adames and Balliet strains of Punta Toro virus (PTV), a Phlebovirus related to Rift Valley fever and sandfly fever viruses. By using inhibition of viral cytopathic effect in LLC-MK2 cells with both virus strains, the 50% effective dose was 4 to 10 micrograms/ml and the virus rating was 1.3. The Adames strain of PTV infection in mice was established for evaluation of the in vivo antiviral efficacy of ribavirin. The drug was administered subcutaneously (s.c.) twice daily for 5 to 7 days beginning 4 h pre-virus inoculation, 24 h post-virus inoculation, or 36 h post-virus inoculation, with increased survivors, reduced hepatic icterus, reduction of serum glutamic oxalic acid transaminase and serum glutamic pyruvic acid transaminase, and inhibition of infectious virus from sera and livers of infected mice. The minimum effective dose was 4.7 mg/kg per day, with a maximum tolerated dose of 75 mg/kg per day. When the same treatment schedule beginning 4 h pre-virus inoculation, 4 h post-virus inoculation, or 24 h post-virus inoculation was used, orally administered ribavirin was effective at doses as low as 6.3 mg/kg per day. Single s.c. ribavirin treatments at doses of 175 to 700 mg/kg administered from 4 to 48 h post-virus inoculation were also effective. No effect was seen when ribavirin was administered s.c. to mice infected intracerebrally with the PTV strain Balliet, even though treatment was begun 36 h before virus exposure. FAU - Sidwell, R W AU - Sidwell RW AD - Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan 84322-5600. FAU - Huffman, J H AU - Huffman JH FAU - Barnett, B B AU - Barnett BB FAU - Pifat, D Y AU - Pifat DY LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PL - United States TA - Antimicrob Agents Chemother JT - Antimicrobial agents and chemotherapy JID - 0315061 RN - 0 (Ribonucleosides) RN - 49717AWG6K (Ribavirin) SB - IM MH - Animals MH - Brain Diseases/drug therapy MH - Bunyaviridae/*drug effects MH - Bunyaviridae Infections/*drug therapy MH - Female MH - Injections, Subcutaneous MH - Mice MH - Mice, Inbred C57BL MH - Ribavirin/administration & dosage/*pharmacology/therapeutic use MH - Ribonucleosides/*pharmacology MH - Time Factors PMC - PMC172170 EDAT- 1988/03/01 00:00 MHDA- 1988/03/01 00:01 PMCR- 1988/03/01 CRDT- 1988/03/01 00:00 PHST- 1988/03/01 00:00 [pubmed] PHST- 1988/03/01 00:01 [medline] PHST- 1988/03/01 00:00 [entrez] PHST- 1988/03/01 00:00 [pmc-release] AID - 10.1128/AAC.32.3.331 [doi] PST - ppublish SO - Antimicrob Agents Chemother. 1988 Mar;32(3):331-6. doi: 10.1128/AAC.32.3.331.