An improved method for measuring vascular permeability in rat and mouse skin

Area of Science:

• Pharmacology
• Biomedical Engineering
• Physiology

Background:

• Vascular permeability is a key indicator of inflammation and tissue response.
• Existing methods for measuring vascular permeability can be time-consuming and involve dye extraction.
• Improved methods are needed for accurate and efficient assessment of vascular permeability.

Purpose of the Study:

• To develop and validate an improved rodent vascular permeability measurement method.
• To utilize fluorescent dye-labeled bovine serum albumin (FITC-BSA) for enhanced detection.
• To establish a sensitive and extraction-free assay for quantifying vascular permeability.

Main Methods:

• Optimized incubation duration for direct fluorescent detection using regression analysis.
• Employed fluorescent dye-labeled bovine serum albumin (FITC-BSA) for measurement.
• Utilized a microplate reader for rapid fluorescence intensity determination.

Main Results:

• Determined optimal incubation time of 2-6 hours for FITC-BSA detection.
• Achieved high correlation (R² = 0.99) between FITC-BSA method and traditional dye extraction.
• Demonstrated dose-dependent histamine-induced serum exudation in rodent skin.
• Showcased rapid measurement times due to microplate reader utilization.

Conclusions:

• The improved method is sensitive, easy to use, and eliminates the need for dye extraction.
• This technique provides a reliable and efficient way to measure vascular permeability.
• The method is suitable for various inflammatory conditions and drug efficacy studies.