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Two-Dimensional Microscopy in Microbiology01:29

Two-Dimensional Microscopy in Microbiology

Two-dimensional (2D) microscopy encompasses a range of optical techniques that capture images within a single focal plane, offering detailed representations of microscopic structures. These techniques are essential in biological and medical research, enabling the visualization of cellular and subcellular structures with different levels of contrast and specificity.There are several major types of 2D microscopy, each with strengths and applications.Bright-Field MicroscopyBright-field microscopy...
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Related Experiment Video

Updated: Jul 20, 2026

Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
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2bRAD-M reveals differences in microbial communities between Modic changes and disc herniation.

Fang Yang1, Jingtao Zhang2, Junpu Zha2

  • 1Department of Radiotherapy, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.

Frontiers in Cellular and Infection Microbiology
|April 7, 2025
PubMed
Summary

This study used 2bRAD-M sequencing to analyze the microbiome of intervertebral discs, finding distinct microbial differences between Modic changes and herniated discs. These findings suggest microbial dysbiosis is linked to Modic changes.

Keywords:
2bRAD-MModic changebacteriadisc herniationlumbar spinemicrobiome

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Area of Science:

  • Microbiology
  • Genomics
  • Spinal Health

Background:

  • Modic changes are linked to various factors including degeneration, inflammation, and genetics.
  • Previous studies identified bacteria in intervertebral discs (IVDs) but faced limitations with low microbial biomass.
  • 16S rRNA sequencing has limitations in species-level analysis due to low microbial biomass in IVD tissue.

Purpose of the Study:

  • To investigate microbial differences between Modic changes and herniated disc samples using a novel sequencing technology.
  • To explore the potential role of microbial dysbiosis in the development of Modic changes.
  • To apply 2bRAD-M sequencing for high-resolution microbiome analysis in low-biomass disc samples.

Main Methods:

  • Surveyed 20 intervertebral disc (IVD) samples (10 Modic changes, 10 herniated discs).
  • Employed 2bRAD-M (2b Restriction Site Associated DNA sequencing for Microbiome) for species-level microbiome profiling.
  • Utilized linear discriminant analysis effect size (LEfSe) and random forest models for taxonomic analysis.

Main Results:

  • Identified 332 microbial species, with distinct taxa enriched in Modic change versus herniated disc groups.
  • Observed enrichment of *Escherichia_coli*, *Cupriavidus_pauculus*, and *Bradyrhizobium_denitrificans* in Modic change samples.
  • A random forest model with eight key species accurately distinguished between the two groups (81.0% accuracy).

Conclusions:

  • This is the first study applying 2bRAD-M to Modic changes and disc herniation, revealing significant microbial differences.
  • Results suggest microbial dysbiosis in the IVD is associated with Modic changes.
  • Identified potential microbial targets for future research into Modic change mechanisms.