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Effect of treatment with certain flavonoids on Mengo virus-induced encephalitis in mice
Abstract:
Among the four flavonoids tested quercetin and morin proved to be significantly effective against lethal Mengo virus-induced encephalitis in mice when the drugs were adminsitered orally (p.o.). With subcutaneous (s.c.) administration all four drugs failed to prevent mortality in the infected mice. Quercetin produced maximum protective response in intraperitoneally (i.p.) or intranasally (i.nas.) infected mice when administered twice daily at doses of 20 mg/kg for a period of not less than four days. Single injections of the full daily dose of drug failed to prevent deaths in mice. Treatment must be begun at the time of, or prior to, virus inoculation. Delayed initiation of treatment was ineffective in preventing mortality.
Insights
Flavonoids like quercetin and morin show effectiveness against Mengo virus encephalitis in mice when given orally. Early oral treatment is crucial for protection, while other administration routes and delayed treatment are ineffective.
Area of Science:
- Virology
- Pharmacology
- Neuroscience
Background:
- Mengo virus infection causes lethal encephalitis in mice.
- Flavonoids are plant-derived compounds with potential therapeutic properties.
- Investigating antiviral efficacy of flavonoids against viral encephalitis is important.
Purpose of the Study:
- To evaluate the efficacy of four flavonoids against Mengo virus-induced encephalitis in mice.
- To determine the optimal administration route and timing for flavonoid treatment.
Main Methods:
- Mice were infected with Mengo virus and treated with quercetin, morin, and two other flavonoids.
- Administration routes included oral (p.o.), subcutaneous (s.c.), intraperitoneal (i.p.), and intranasal (i.nas.).
- Treatment timing varied from prophylactic to delayed initiation.
Main Results:
- Quercetin and morin demonstrated significant efficacy when administered orally (p.o.).
- Subcutaneous (s.c.) administration of all tested flavonoids failed to prevent mortality.
- Optimal protection was achieved with quercetin administered twice daily at 20 mg/kg for at least four days, starting at or before inoculation.
Conclusions:
- Oral administration of specific flavonoids, notably quercetin and morin, offers a promising therapeutic strategy against Mengo virus encephalitis.
- Early intervention and consistent dosing are critical for successful treatment outcomes.
- Further research into flavonoid-based antivirals is warranted for neurotropic viral infections.