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Related Experiment Video

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Protocol to Isolate Germinal Centers by Laser Microdissection.

Farbod Bahreini1, Markus Niebuhr1, Julia Belde1

  • 1Institute of Anatomy, University of Luebeck, Luebeck, Germany.

Bio-Protocol
|July 8, 2022
PubMed
Summary

Researchers developed a new method to study germinal centers (GC) in their natural environment. This technique preserves cellular interactions and allows for detailed histological and transcriptomic analysis of individual GCs.

Keywords:
Cryo-preserved lymphoid structuresFollicular T helper cellsGerminal centersIn vivo analysisLaser microdissectionSecondary lymphoid organs

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Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Germinal centers (GC) are crucial microstructures for adaptive immune responses.
  • GCs facilitate interactions between antigen-specific B cells and follicular T helper (Tfh) cells.
  • Current methods like flow cytometry disrupt the GC microenvironment, losing vital spatial information.

Purpose of the Study:

  • To establish a method for studying germinal centers (GC) in vivo within their native microenvironment.
  • To enable detailed histological and transcriptomic analysis of individual GCs.
  • To overcome the limitations of traditional cell dissociation techniques.

Main Methods:

  • Isolation of individual germinal centers (GC) using laser microdissection.
  • Utilization of frozen tissues to minimize mRNA degradation.
  • Development of a rapid staining protocol for GC identification.
  • Combined histological and transcriptomic analysis of isolated GCs.

Main Results:

  • Successful isolation of intact germinal centers (GCs) from lymphoid organs.
  • Preservation of tissue architecture and cellular neighborhoods within GCs.
  • Enabling of subsequent transcriptomic analysis from microdissected GCs.
  • Demonstration of a protocol compatible with both histological and molecular studies.

Conclusions:

  • The developed laser microdissection protocol allows for in situ analysis of germinal centers (GCs).
  • This method preserves the microenvironment crucial for understanding B and T cell interactions.
  • It opens new avenues for detailed transcriptomic and histological investigations of individual GCs within their native context.