CTLs From Patients With Atherosclerosis Show Elevated Adhesiveness and Distinct Integrin Expression Patterns on 2D...

Area of Science:

• Immunology
• Cardiovascular Biology
• Cellular Biology

Background:

• Atherosclerosis involves chronic inflammation and increased cytotoxic T-lymphocytes (CTLs) in plaques.
• Studying CTL recruitment requires in vitro models of their interactions with plaque components.

Purpose of the Study:

• To investigate CTL adhesion and migration on various substrates using an in vitro model.
• To assess differences in chemokine receptor and integrin expression in CTLs from atherosclerosis patients versus healthy donors.

Main Methods:

• Developed an in vitro model to study CTL adhesion and migration on six coated surfaces.
• Assessed adhesion, motility, and expression of chemokine receptors and integrins in CTLs.
• Utilized fibronectin, patient-derived platelet-poor plasma, and atherosclerotic plaque conditioned medium.

Main Results:

• Substrates like fibronectin, alone or with plasma/conditioned medium, increased CTL adhesiveness, significantly more in patients.
• Integrin-coding mRNA levels rose with fibronectin; ITGB1, ITGA1, and ITGA4 were upregulated in patients.
• Expression of chemokine receptor mRNAs (CCR4, CCR5, CX3CR1) remained unaffected by the experimental model.

Conclusions:

• CTL adhesion and integrin expression are substrate-dependent.
• Adhesion parameters and integrin expression levels can differentiate CTLs from atherosclerosis patients and healthy donors.
• The developed in vitro model effectively highlights substrate-driven changes in CTL behavior relevant to atherosclerosis.