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Synthesis and antiviral activity of PB1 component of the influenza A RNA polymerase peptide fragments

O V Matusevich1, V V Egorov2, I A Gluzdikov1

  • 1Saint Petersburg State University, Faculty of Chemistry, 26, Universitetskii pr., Petrodvorets, St. Petersburg 198504, Russia.

Antiviral Research
|December 3, 2014
PubMed

Insights

Short peptide fragments from the influenza A PB1 protein show significant antiviral activity. Modified PB1 (6-14) peptide suppressed viral replication and offers potential for new influenza treatments.

Area of Science:

  • Virology
  • Molecular Biology
  • Drug Discovery

Background:

  • Influenza A virus poses a significant global health threat.
  • Current antiviral therapies face challenges like drug resistance.
  • The influenza A RNA polymerase complex is a potential target for antiviral agents.

Purpose of the Study:

  • To investigate the antiviral activity of peptide fragments derived from the PB1 protein of influenza A.
  • To identify specific PB1 peptide sequences with potent anti-influenza properties.
  • To evaluate the potential of these peptides as novel therapeutic leads.

Main Methods:

  • Synthesis and screening of PB1 protein peptide fragments for antiviral activity.
  • Testing in MDCK cell cultures against pandemic influenza A/California/07/2009 (H1N1) pdm09.
  • Evaluation of terminal modifications (N-acetylation, C-amidation) on peptide activity.
  • Assessment of peptide cellular uptake using fluorescently labeled analogs.
  • Testing against a panel of influenza A virus subtypes (H1, H3, H5), including oseltamivir-resistant strains.

Main Results:

  • Several PB1 peptide fragments (6-13, 6-14, 26-30, 395-400, 531-540) demonstrated suppression of viral replication.
  • N-acetylation and C-amidation significantly enhanced antiviral properties.
  • The modified PB1 (6-14) peptide exhibited maximum antiviral activity, inhibiting early viral replication stages.
  • The fluorescently labeled PB1 (6-14) analog successfully penetrated cells.
  • PB1 (6-14) showed broad-spectrum activity against diverse influenza A subtypes, including oseltamivir-resistant strains.

Conclusions:

  • Short peptide fragments of the PB1 protein possess significant antiviral activity against influenza A.
  • Terminal modifications enhance the efficacy of these peptide fragments.
  • The PB1 (6-14) peptide is a promising candidate for developing new anti-influenza agents.
  • These findings suggest PB1 peptide fragments can serve as valuable leads for influenza prevention and treatment strategies.
Keywords:
Antiviral peptidesInfluenza AInfluenza A polymerasePB1

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