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Microenvironment Magnesium Overload Disrupts Bacterial Membrane Functions for the Central Nervous System Infection

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A novel magnesene nanosheet effectively combats bacterial central nervous system (CNS) infections by disrupting bacterial membranes. This inorganic nanomedicine shows promise for treating difficult CNS infections and other microbial pathogens.

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Area of Science:

  • Nanomedicine
  • Inorganic chemistry
  • Microbiology

Background:

  • Bacterial central nervous system (CNS) infections are life-threatening with high mortality.
  • Limited drug penetration across the blood-brain barrier and antimicrobial toxicity hinder treatment.
  • Novel therapeutic strategies are crucial for combating refractory CNS infections.

Purpose of the Study:

  • To develop a novel nanomedicine for treating bacterial CNS infections.
  • To investigate the antimicrobial mechanism of magnesene nanosheets.
  • To evaluate the efficacy of magnesene in preclinical CNS infection models.

Main Methods:

  • Two-dimensional magnesene nanosheets were synthesized via ultrasound exfoliation of magnesium.
  • The antimicrobial activity of magnesene was assessed against bacterial pathogens in vitro.
  • Efficacy was evaluated in rat CNS infection models, including assessment of neuroinflammation.

Main Results:

  • Magnesene releases Mg2+ ions, causing magnesium overload and mechanical membrane disruption in bacteria.
  • Magnesene demonstrated potent, broad-spectrum antimicrobial activity against Staphylococcus aureus and Escherichia coli.
  • In vivo studies showed magnesene suppressed bacterial proliferation and reduced neuroinflammation in rat CNS infection models.

Conclusions:

  • Magnesene is a promising inorganic nanomedicine for treating bacterial CNS infections.
  • The dual mechanism of action provides potent bactericidal effects.
  • Magnesene offers a potential new therapeutic avenue for diverse microbial pathogens.