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Updated: Dec 18, 2025
Isolation of Primary Murine Brain Microvascular Endothelial Cells
Published on: November 14, 2014
Isolation and Purification of Mouse Brain Endothelial Cells to Study Cerebral Cavernous Malformation Disease
Preston Hale1, Shady Ibrahim Soliman1, Hao Sun1
1Department of Medicine and Pharmacology, University of California, San Diego, La Jolla, CA, USA.
Abstract:
We describe a method to purify primary brain microvascular endothelial cells (BMEC) from mice bearing floxed alleles of Krit1 (Krit1fl/fl) or Pdcd10 (Pdcd10fl/fl) and an endothelial-specific tamoxifen-regulated Cre recombinase (Pdgfb-iCreERT2), and used these to delete Krit1 or Pdcd10 genes in a time-controlled manner. These BMEC culture models contain a high degree of purity and have been used to identify the major molecular processes involved in loss of Krit1/Pdcd10-induced altered brain endothelial phenotype and function. In addition, these in vitro models of cerebral cavernous malformations (CCMs) enable molecular, biochemical, and pharmacological studies that have contributed significantly to understand the pathogenesis of CCMs. The findings using this in vitro CCMs model have been validated in mouse CCM models and observed in human CCMs. In this chapter, we summarize procedures for isolation and purification of BMEC from transgenic mice, as well as our experience to genetically inactivate CCM genes in the brain endothelium.
Insights
Researchers developed a method to purify brain microvascular endothelial cells (BMEC) to study cerebral cavernous malformations (CCMs). This technique allows for controlled gene deletion to understand CCM pathogenesis.
Area of Science:
- Neuroscience
- Cell Biology
- Genetics
Background:
- Cerebral cavernous malformations (CCMs) are vascular disorders affecting the brain.
- Understanding the molecular mechanisms underlying CCM pathogenesis is crucial for developing effective treatments.
Purpose of the Study:
- To describe a method for purifying primary mouse brain microvascular endothelial cells (BMEC).
- To establish in vitro models for studying the genetic inactivation of CCM-related genes (Krit1, Pdcd10).
- To investigate the molecular processes involved in altered brain endothelial phenotype and function due to Krit1/Pdcd10 loss.
Main Methods:
- Isolation and purification of primary BMEC from transgenic mice (Krit1fl/fl or Pdcd10fl/fl with Pdgfb-iCreERT2).
- Time-controlled genetic inactivation of Krit1 or Pdcd10 genes in BMEC using tamoxifen.
- Establishment of in vitro CCM models for molecular, biochemical, and pharmacological studies.
Main Results:
- High-purity BMEC culture models were established.
- Identified key molecular processes underlying altered brain endothelial function upon Krit1/Pdcd10 gene deletion.
- The in vitro findings were validated in mouse models and observed in human CCMs.
Conclusions:
- The described method provides a robust in vitro model for studying CCM pathogenesis.
- This approach facilitates the investigation of genetic and molecular factors contributing to CCMs.
- The findings contribute to a better understanding of CCM disease mechanisms and potential therapeutic targets.
