Human CXCR3 Virus-Like Particles

CXCR3 is a G protein-coupled receptor (GPCR) primarily expressed on activated T lymphocytes, natural killer (NK) cells, and other immune cells. It plays a key role in immune responses by binding to its endogenous chemokine ligands, which are induced by interferon-γ (IFN-γ). These interactions mediate the recruitment of immune cells to sites of inflammation, infection, or the tumor microenvironment, making CXCR3 a key player in autoimmune diseases, viral infections, and cancer immunology. Due to its involvement in inflammatory pathways, CXCR3 has become a promising therapeutic target.

Human CXCR3 virus-like particles (VLPs) are non-infectious, self-assembling nanostructures that mimic the native conformation of CXCR3 within lipid bilayers, providing a powerful platform for studying receptor-ligand interactions, drug discovery, and vaccine development. Unlike traditional soluble receptors, VLPs preserve the tertiary structure and post-translational modifications of CXCR3, ensuring its biologically relevant binding properties. These particles are typically produced by co-expressing CXCR3 with viral structural proteins (such as HIV Gag or hepatitis B surface antigen) in mammalian or insect cell systems, which spontaneously form enveloped particles with functional CXCR3.