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11:56
A Rapid and Specific Microplate Assay for the Determination of Intra- and Extracellular Ascorbate in Cultured Cells
Published on: April 11, 2014
Antiviral effects of dehydroascorbic acid.
Misao Uozaki1, Keiko Ikeda, Kazuko Tsujimoto
1Division of Virology, Department of Cellular and Molecular Medicine, Wakayama Medical University Graduate School of Medicine, Wakayama 641-0011, Japan ;
Experimental and Therapeutic Medicine
|September 21, 2012
Summary
Dehydroascorbic acid demonstrates broad-spectrum antiviral activity against herpes simplex virus type 1, influenza A, and poliovirus. This compound inhibits viral multiplication post-DNA replication, specifically during viral nucleocapsid envelopment.
Area of Science:
- Virology
- Biochemistry
- Cell Biology
Background:
- Viral infections pose significant global health challenges.
- Identifying novel antiviral agents is crucial for combating emerging and resistant viral strains.
- Ascorbic acid derivatives are being explored for therapeutic potential.
Purpose of the Study:
- To investigate the antiviral activity of dehydroascorbic acid against a panel of viruses.
- To characterize the mechanism of action of dehydroascorbic acid against herpes simplex virus type 1 (HSV-1).
- To determine if antiviral effects are independent of cytotoxicity.
Main Methods:
- In vitro antiviral assays were performed using HSV-1, influenza A virus, and poliovirus type 1.
- Cytotoxicity assays were conducted to determine the safety profile of dehydroascorbic acid.
- One-step growth curves were utilized to analyze the kinetics of viral replication inhibition.
- Time-of-addition experiments were performed to pinpoint the stage of viral replication affected.
Main Results:
- Dehydroascorbic acid significantly inhibited the multiplication of HSV-1, influenza A, and poliovirus.
- Antiviral effects were observed at concentrations well below those causing cytotoxicity.
- For HSV-1, dehydroascorbic acid addition post-infection inhibited progeny virus formation.
- Viral replication was suppressed approximately 2 hours after dehydroascorbic acid addition, suggesting post-DNA replication inhibition.
Conclusions:
- Dehydroascorbic acid exhibits potent antiviral properties against diverse viral families.
- The antiviral mechanism of dehydroascorbic acid against HSV-1 appears to involve the inhibition of viral nucleocapsid envelopment at the Golgi apparatus.
- Dehydroascorbic acid represents a promising candidate for further development as an antiviral therapeutic.
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