CXCR3 ligands in disease and therapy

Area of Science:

• Immunology
• Cell Biology
• Molecular Biology

Background:

• Chemokines and their G protein-coupled receptors guide leukocyte movement in health and inflammation.
• Chemokine receptor expression extends beyond leukocytes, indicating broader physiological and pathological roles.
• The CXCR3 chemokine receptor is found on immune cells (T lymphocytes, dendritic cells, NK cells) and non-immune cells (fibroblasts, smooth muscle, epithelial, endothelial cells).

Purpose of the Study:

• To review the presence and function of CXCR3 ligands in diverse diseases.
• To explore the therapeutic potential of CXCR3 ligand modulation (administration or blockade).
• To discuss the utility of CXCR3 ligands as predictive or prognostic biomarkers.

Main Methods:

• Literature review of studies on CXCR3 ligands and their roles in various disorders.
• Analysis of CXCR3 receptor variants (CXCR3A and CXCR3B) and their distinct signaling pathways.
• Examination of the functions of specific CXCR3 ligands, including CXCL4, CXCL4L1, CXCL9, CXCL10, and CXCL11.

Main Results:

• CXCR3A activation by its ligands mediates chemotactic and proliferative responses, particularly in leukocytes.
• CXCR3B activation induces anti-proliferative and anti-migratory effects, such as angiostasis in endothelial cells.
• CXCR3 and its ligands are implicated in malignant, angiogenic, infectious, and inflammatory diseases due to their versatile functions.

Conclusions:

• CXCR3 and its ligands exhibit multifunctional characteristics, contributing to a wide array of diseases.
• Modulation of CXCR3 signaling presents potential therapeutic strategies for various conditions.
• CXCR3 ligands may serve as valuable biomarkers for disease prediction and prognosis.