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Comparative proteomic analysis of vancomycin-sensitive and vancomycin-intermediate resistant Staphylococcus aureus.

Jian Hu1, Xinjun Han2, Xiaoxue Ma2

  • 1Department of Laboratory Medicine, Yixing Hospital of Traditional Chinese Medicine, Yixing, No. 128 East Yangquan Road, Yicheng Subdistrict, Yixing, 214200, Jiangsu, People's Republic of China.

European Journal of Clinical Microbiology & Infectious Diseases : Official Publication of the European Society of Clinical Microbiology
|November 20, 2023
PubMed
Summary

This study used proteomics to identify proteins linked to vancomycin resistance in Staphylococcus aureus. Understanding these molecular changes in vancomycin-intermediate resistant S. aureus (VISA) can help combat antibiotic resistance.

Keywords:
Large-quantity proteomicsS. aureusVISAVancomycin resistancehVISA

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Area of Science:

  • Microbiology
  • Proteomics
  • Molecular Biology

Background:

  • Vancomycin is a critical antibiotic for treating Staphylococcus aureus infections.
  • Increasing vancomycin resistance in S. aureus poses a significant public health threat.
  • Understanding the molecular mechanisms of resistance is crucial for developing new therapeutic strategies.

Purpose of the Study:

  • To investigate the molecular basis of vancomycin resistance in S. aureus.
  • To compare the proteomes of vancomycin-intermediate resistant S. aureus (VISA) and vancomycin-sensitive S. aureus (VSSA) strains.
  • To identify differentially expressed proteins associated with vancomycin resistance.

Main Methods:

  • Proteomics analysis of subcellular fractions from isogenic VSSA and VISA strains.
  • Integrated quantitative proteomics approach.
  • Comprehensive bioinformatics analysis including protein annotation and functional enrichment.

Main Results:

  • Identified 128 upregulated and 21 downregulated proteins in the VISA strain compared to the VSSA strain.
  • Enzymatic proteins involved in metabolic and catalytic activities were significantly altered.
  • Proteins related to cell wall metabolism, cell adhesion, proteolysis, and pressure response were identified as key players in vancomycin resistance.

Conclusions:

  • Proteomics analysis revealed key regulatory proteins associated with vancomycin resistance in S. aureus.
  • These identified proteins offer potential therapeutic targets for managing vancomycin resistance.
  • The findings contribute to a deeper understanding of the molecular mechanisms underlying S. aureus resistance to vancomycin.