Studying leukocyte recruitment under flow conditions

Area of Science:

• Biomedical Engineering
• Cell Biology
• Immunology

Background:

• Leukocyte recruitment from blood vessels is a critical inflammatory process.
• This recruitment is influenced by haemodynamic shear stress.
• In vitro models are essential for studying these complex cellular interactions.

Purpose of the Study:

• To describe standardized methods for studying leukocyte recruitment under shear stress.
• To enable quantitative analysis of leukocyte adhesion and transmigration.
• To provide a versatile platform for investigating cell-cell interactions.

Main Methods:

• Utilizing a parallel plate flow chamber for in vitro studies.
• Employing whole blood or isolated leukocyte suspensions.
• Assessing interactions with endothelial cells under controlled shear conditions.

Main Results:

• Methods allow measurement of total recruited leukocytes, rolling/adherent percentages, and transmigration.
• The system is adaptable for various adhesive substrates and particles.
• Successful application to cytokine-stimulated and genetically modified endothelial cells.

Conclusions:

• The described flow chamber methods offer a robust and adaptable approach for studying leukocyte recruitment.
• These techniques are valuable for understanding inflammatory processes and cell adhesion.
• The methodology can be applied to diverse cell-substrate and cell-particle interaction studies.