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Viruses with RNA Genomes01:29

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RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
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In vitro effect of some nucleoside reverse transcriptase inhibitors against HSV-1 replication.

R Nahid Samiei1, S Ebrahimi, M Fani

  • 1Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. teimooriali1982@gmail.com.

European Review for Medical and Pharmacological Sciences
|February 26, 2020
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Summary

Nucleoside reverse transcriptase inhibitors (NRTIs) were tested against herpes simplex virus type 1 (HSV-1). Several NRTIs significantly reduced HSV-1 replication in cell culture, showing potential antiviral activity.

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Area of Science:

  • Virology
  • Pharmacology
  • Molecular Biology

Background:

  • Herpes simplex virus type 1 (HSV-1) is a common human pathogen.
  • Nucleoside reverse transcriptase inhibitors (NRTIs) are a class of antiviral drugs primarily used to treat HIV.
  • The potential of NRTIs against other viral infections, like HSV-1, is an area of ongoing research.

Purpose of the Study:

  • To investigate the efficacy of selected nucleoside reverse transcriptase inhibitors (NRTIs) against herpes simplex virus type 1 (HSV-1) infection.
  • To evaluate the direct antiviral effects of NRTIs on HSV-1 replication in vitro.

Main Methods:

  • In silico prediction of interactions between HSV-1 thymidine kinase and various NRTIs using the SwissTargetPrediction server.
  • Assessment of Vero cell viability following treatment with NRTIs using the MTT assay.
  • Quantification of HSV-1 replication via quantitative real-time PCR (qPCR) in treated cell supernatants.

Main Results:

  • Acyclovir, zidovudine, stavudine, didanosine, and entecavir demonstrated significant reductions in HSV-1 viral titers.
  • Viral titer reductions ranged from 19-fold (stavudine) to 44-fold (didanosine).
  • The MTT assay confirmed that the tested NRTIs did not adversely affect Vero cell viability at the concentrations used.

Conclusions:

  • Nucleoside reverse transcriptase inhibitors (NRTIs) exhibit significant antiviral activity against HSV-1 in cell culture.
  • These findings suggest that NRTIs could be potential candidates for further investigation as anti-HSV-1 agents.
  • The study highlights the broad-spectrum antiviral potential of certain NRTIs beyond their established use in HIV therapy.