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Updated: Jun 7, 2025

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA
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Published on: February 9, 2011

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Histone H1 kills MRSA.

Gerben Marsman1, Xuhui Zheng2, Dora Čerina1

  • 1Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Charitéplatz 1, 10117 Berlin, Germany.

Cell Reports
|November 15, 2024
PubMed
Summary
This summary is machine-generated.

Histone H1 effectively kills methicillin-resistant Staphylococcus aureus (MRSA) by entering the bacterial cell and binding to DNA. This finding reveals a novel mechanism for histone antimicrobial activity against resistant bacteria.

Keywords:
CP: MicrobiologyMRSAStaphylococcus aureusantimicrobial peptidesantimicrobial resistancehistonesneutrophil extracellular trapswall teichoic acids

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Assays for Validating Histone Acetyltransferase Inhibitors
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Area of Science:

  • Microbiology
  • Immunology
  • Biochemistry

Background:

  • Histones possess antimicrobial properties, known since the 1940s, but their precise mechanisms remain largely unelucidated.
  • Methicillin-resistant Staphylococcus aureus (MRSA) presents a significant public health challenge due to its resistance to antibiotics.

Purpose of the Study:

  • To elucidate the mechanism by which histone H1 exerts antimicrobial activity against MRSA.
  • To investigate the potential role of histone H1 in combating MRSA infections in vivo.

Main Methods:

  • Utilized selective evolution and genome-wide transposon library screening to identify mechanisms of MRSA susceptibility to histone H1.
  • Conducted physiological and pharmacological experiments to understand histone H1-MRSA interactions.
  • Analyzed histone H1 localization in bacterial cells and patient abscess samples.

Main Results:

  • Histone H1 demonstrates potent antimicrobial activity against MRSA, even under challenging conditions like the presence of divalent cations and serum.
  • Histone H1 binds to wall teichoic acids, permeabilizes the bacterial membrane, and enters the cell.
  • Intracellular accumulation of histone H1 in association with bacterial DNA was observed.
  • Anti-histone H1 antibodies inhibited neutrophil extracellular trap-mediated killing of MRSA.
  • Histone H1 colocalized with bacterial DNA in MRSA-infected patient abscesses.

Conclusions:

  • Histone H1 employs a multi-step mechanism involving cell wall binding, membrane permeabilization, and intracellular DNA association to kill MRSA.
  • Histone H1 plays a role in the innate immune response against MRSA, particularly within neutrophil extracellular traps.
  • These findings suggest histone H1 as a potential therapeutic agent against antibiotic-resistant bacterial infections.