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Related Experiment Video

Updated: Jun 9, 2025

Isolation and Profiling of Human Primary Mesenteric Arterial Endothelial Cells at the Transcriptome Level
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Microvessel isolation protocol for RNA visualization and profiling.

Oandy Naranjo1, Olivia M Osborne2, Silvia Torices3

  • 1Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, USA. oxn62@miami.edu.

Scientific Reports
|October 27, 2024
PubMed
Summary

This study introduces an RNA-friendly method to isolate microvessels, revealing decreased pericytes and increased TYROBP mRNA in Alzheimer's disease mouse models. This advances understanding of blood-brain barrier dysfunction.

Keywords:
Alzheimer’s diseaseBlood-brain barrierEndothelial cellsMicrovesselsPericytesRNAscope

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Biochemistry

Background:

  • Blood-brain barrier (BBB) integrity is crucial for neurological health.
  • Disruptions in pericyte-endothelial cell communication compromise the BBB.
  • Current methods for microvessel RNA analysis lack spatial context.

Purpose of the Study:

  • To develop an RNA-friendly microvessel isolation technique.
  • To combine this technique with RNAscope for spatial RNA visualization.
  • To investigate microvessel changes in a mouse model of Alzheimer's disease (AD).

Main Methods:

  • Developed an RNA-friendly microvessel isolation protocol.
  • Utilized RNAscope in situ hybridization for cell-specific RNA detection.
  • Analyzed microvessels from 5xFAD (AD model) and wild-type mice.

Main Results:

  • Successfully visualized cell-specific RNA within the BBB's spatial context.
  • Observed a reduction in pericytes in 5xFAD mouse microvessels compared to controls.
  • Detected elevated TYRO protein tyrosine kinase binding protein (TYROBP) mRNA expression in 5xFAD microvessels.

Conclusions:

  • The novel method allows detailed spatial analysis of microvessel RNA in the BBB.
  • Findings highlight altered pericyte numbers and TYROBP expression in AD pathology.
  • This approach offers new insights into neurovascular dysfunction and potential therapeutic targets.