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'In vivo' variations in serum interferon levels produced by antiviral compounds
Abstract:
The effects of adamantane, amantadine, and glucosamine on the interferon induction in chickens as compared to mice were studied. Nonviral and viral inductions were produced either by Pseudomonas aeruginosa endotoxin or by some orthomyxoviridae. After establishing their toxicity, single treatments with the drugs were intraperitoneally administered at two different doses 36, 24, and 12 h before or 2 h after the time of interferon induction. Data obtained show that adamantane and its derivative amantadine are able to inhibit the 'in vivo' interferon synthesis only when viral inductors are used; possibly by impairing the necessary stimulative action of the viral nucleic acid at the replication level. Glycosylation inhibitors like glucosamine were uneffective on interferon induction 'in vivo'.
Insights
Adamantane and amantadine inhibit viral interferon synthesis in vivo, potentially by interfering with viral nucleic acid. Glucosamine did not affect interferon induction in this study.
Area of Science:
- Immunology
- Virology
- Pharmacology
Background:
- Interferon (IFN) induction is a critical innate immune response against viral infections.
- Adamantane, amantadine, and glucosamine are compounds with known biological activities.
- Understanding modulators of IFN synthesis is crucial for developing antiviral strategies.
Purpose of the Study:
- To investigate the effects of adamantane, amantadine, and glucosamine on interferon induction in chickens and mice.
- To compare the efficacy of these compounds against both viral and nonviral inducers of interferon.
- To elucidate the potential mechanisms by which these drugs influence interferon synthesis.
Main Methods:
- Interferon induction was achieved using viral (orthomyxoviridae) and nonviral (Pseudomonas aeruginosa endotoxin) stimuli in chickens and mice.
- Adamantane, amantadine, and glucosamine were administered intraperitoneally at varying doses and time points relative to induction.
- Toxicity of the compounds was established prior to treatment.
- Interferon levels were assessed following drug administration and induction.
Main Results:
- Adamantane and amantadine demonstrated an inhibitory effect on 'in vivo' interferon synthesis exclusively when viral inducers were employed.
- The inhibitory action of adamantane and amantadine appears linked to viral nucleic acid stimulation at the replication level.
- Glucosamine, a glycosylation inhibitor, showed no significant effect on 'in vivo' interferon induction by either viral or nonviral stimuli.
Conclusions:
- Adamantane and amantadine possess antiviral properties by modulating the interferon response specifically against viral agents.
- The mechanism of inhibition by adamantane and amantadine involves interference with viral replication processes.
- Glucosamine is not effective in modulating 'in vivo' interferon induction, suggesting its pathways do not impact this immune response.