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Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
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Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
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Published on: May 8, 2013

PHACOS, a functionalized bacterial polyester with bactericidal activity against methicillin-resistant Staphylococcus

Nina Dinjaski1, Mar Fernández-Gutiérrez, Shivaram Selvam

  • 1Centro de Investigaciones Biológicas, CSIC, Madrid 28040, Spain.

Biomaterials
|October 8, 2013
PubMed
Summary

A novel bacterial polyhydroxyalkanoate (PHACOS) demonstrates potent antibacterial properties against methicillin-resistant Staphylococcus aureus (MRSA). This infection-resistant biomaterial shows promise for preventing implant-associated infections.

Keywords:
Antimicrobial polymersBiofilmBiomaterial infectionFunctionalized polyhydroxyalkanoateMethicillin-resistant Staphylococcus aureus

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Area of Science:

  • Biomaterials Science
  • Infectious Diseases
  • Polymer Chemistry

Background:

  • Biomaterial-associated infections are a growing clinical challenge due to antibiotic-resistant bacteria.
  • Developing effective infection-resistant biomaterials is crucial for patient safety and treatment outcomes.

Purpose of the Study:

  • To investigate the antibacterial properties of a naturally functionalized bacterial polyhydroxyalkanoate (PHACOS).
  • To evaluate PHACOS as a potential solution for preventing biomaterial-associated infections, particularly those caused by MRSA.

Main Methods:

  • In vitro and in vivo testing of PHACOS against MRSA.
  • Assessment of bacterial adhesion, biofilm formation, and cytotoxicity.
  • In vivo fluorescence imaging and immunohistochemistry in a murine model of implant-associated infection.

Main Results:

  • PHACOS selectively inhibited MRSA growth in vitro and in vivo.
  • PHACOS significantly reduced S. aureus biofilm formation compared to control polymers.
  • PHACOS exhibited minimal cytotoxic and inflammatory effects and demonstrated excellent antibacterial activity in vivo.

Conclusions:

  • PHACOS possesses inherent antibacterial properties attributed to its functionalized side chains.
  • PHACOS acts via a contact-active surface mechanism, reducing biofilm formation and infection.
  • This functionalized polyhydroxyalkanoate is a promising candidate for developing infection-resistant biomaterials.