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Therapeutic Potential of an Endolysin Derived from Kayvirus S25-3 for Staphylococcal Impetigo

Ichiro Imanishi1, Jumpei Uchiyama2, Toshihiro Tsukui3

  • 1Laboratory of Veterinary Internal Medicine, Division of Animal Life Science, Institute of Agriculture, Graduate School, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan.

Viruses
|August 25, 2019
PubMed

Insights

Recombinant S25-3 endolysin shows promise for treating staphylococcal impetigo. This enzyme effectively kills Staphylococcus aureus, reduces infection severity, and benefits skin microbiota.

Area of Science:

  • Microbiology
  • Dermatology
  • Biotechnology

Background:

  • Impetigo is a contagious skin infection often caused by Staphylococcus aureus.
  • Antibiotic-resistant strains of S. aureus present treatment challenges.
  • Bacteriophage endolysins offer a potential alternative due to low resistance development and preservation of beneficial microflora.

Purpose of the Study:

  • To investigate the therapeutic potential of recombinant S25-3 endolysin against staphylococcal impetigo.
  • To evaluate the efficacy and safety of endolysin treatment in an experimental setting.

Main Methods:

  • Assessed bactericidal activity of recombinant S25-3 endolysin against S. aureus.
  • Utilized an experimental mouse model to evaluate topical endolysin application for impetigo.
  • Analyzed changes in intraepidermal staphylococci, pustule size, and skin microbiota diversity.
  • Determined the genus-specific bacteriolytic effect of the endolysin on staphylococci and commensal bacteria.

Main Results:

  • Recombinant S25-3 endolysin demonstrated efficient bactericidal effects against S. aureus after 15 minutes of incubation.
  • Topical endolysin treatment reduced intraepidermal staphylococci and pustule size in the mouse model.
  • Endolysin treatment led to increased skin microbiota diversity.
  • The endolysin exhibited genus-specific lysis of staphylococci, particularly S. aureus, among skin commensals.

Conclusions:

  • Recombinant S25-3 endolysin is a promising therapeutic agent for staphylococcal impetigo.
  • Topical endolysin treatment effectively targets S. aureus while promoting a healthier skin microbiome.
  • This approach offers a potential solution for managing impetigo, especially with rising antibiotic resistance.
Keywords:
Staphylococcus aureusbacteriophagecutaneous microbiomeendolysinimpetigokayvirus

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