An Optimized Evans Blue Protocol to Assess Vascular Leak in the Mouse

Overview

This article describes a simple and economical protocol using the Evans blue dye method to assess plasma extravasation in FVBN mice. The method can be adapted for various strains, species, and tissues.

Key Study Components

Area of Science

• Vascular biology
• Animal models
• Plasma extravasation assessment

Background

• Understanding plasma extravasation is crucial in vascular research.
• The Evans blue dye method is a well-established technique.
• Catheterization provides durable venous access for accurate measurements.
• Challenges exist for new users due to surgical complexity.

Purpose of Study

• To assess plasma extravasation in mouse organs.
• To identify factors influencing plasma leakage.
• To provide a reproducible method for various species.

Methods Used

• Modified Evans blue dye method for quantifying leakage.
• Catheterization of the mouse for venous access.
• Use of adult FVB NJ mice aged 16 to 20 weeks.
• Monitoring of surgical competence during the procedure.

Main Results

• The method allows for reliable quantification of plasma extravasation.
• Factors affecting leakage can be systematically studied.
• Reproducibility across different mice enhances data reliability.
• Challenges in catheter placement can be mitigated with practice.

Conclusions

• The Evans blue dye method is effective for assessing vascular permeability.
• Adaptability to various strains and species broadens its application.
• Further studies can explore the mechanisms behind plasma extravasation.

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