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Related Experiment Video

Updated: Jun 3, 2025

Flow Cytometry Analysis of Immune Cell Subsets within the Murine Spleen, Bone Marrow, Lymph Nodes and Synovial Tissue in an Osteoarthritis Model
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Exploring the Link Between Infections and Primary Osteoarthritis: A Next-Generation Metagenomic Sequencing Approach.

Irina Niecwietajewa1, Jakub Banasiewicz2, Gabriel Zaremba-Wróblewski3

  • 1Department of Medical Microbiology, Medical University of Warsaw, Chalubinski 5 Str., 02-004 Warsaw, Poland.

International Journal of Molecular Sciences
|January 11, 2025
PubMed
Summary

This pilot study used metagenomic sequencing to identify microorganisms in knee osteoarthritis patients. Bacterial DNA, including Yersinia enterocolitica, was found, suggesting a potential link to knee osteoarthritis pathogenesis.

Keywords:
Escherichia coliSynechococcusYersinia enterocoliticaprimary knee osteoarthritis

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Area of Science:

  • Microbiology
  • Genomics
  • Orthopedics

Background:

  • Knee osteoarthritis (OA) is a prevalent degenerative joint disease.
  • The role of microorganisms in OA pathogenesis remains largely unexplored.

Purpose of the Study:

  • To investigate the association between microorganisms and knee osteoarthritis using metagenomic next-generation sequencing (mNGS).
  • To identify specific pathogens present in synovial membrane, synovial fluid, and blood samples from OA patients.

Main Methods:

  • Prospective pilot study involving two patients undergoing knee arthroplasty.
  • Collection of synovial membrane, synovial fluid, and blood samples.
  • DNA isolation, library construction, and deep whole-genome sequencing (DNBSEQT17 platform).
  • Metagenomic data analysis using NCBI NT database for species abundance determination.

Main Results:

  • Predominant bacterial species identified across all samples belonged to the Enterobacterales order.
  • The most abundant microorganism detected was *Yersinia enterocolitica*.
  • *Escherichia coli* and *Synechococcus* sp. were also identified, with the latter being a bioaerosol component.

Conclusions:

  • Metagenomic next-generation sequencing is a viable tool for exploring microbial roles in knee osteoarthritis.
  • Bacterial DNA, notably *Yersinia*, was detected in samples from knee osteoarthritis patients.
  • Further large-scale studies are required to confirm the role of identified microorganisms in OA pathogenesis.