Engineering viral vectors with CD200 enhances anti-inflammatory and phagocytosis resistance

immobilized metal affinity chromatography (IMAC). Successful protein assembly was confirmed by SDS-PAGE and western blot. Biotinylated VSV-G pseudotyped lentiviral vectors, encoding a green fluorescent protein reporter, were functionalized with CD200ED-coreSA. When exposed to murine J774A.1 macrophages, CD200ED-modified lentiviruses significantly reduced pro-inflammatory cytokine production - evidenced by 47.1% decrease in TNF-α and 55% decrease in IL-6 - compared to unmodified controls. Additionally, CD200ED anchoring reduced macrophage phagocytosis of lentiviral particles by 25%. These findings demonstrate that CD200-tethering confers dual anti-inflammatory and phagocytosis resistance capabilities to viral vectors, offering a promising strategy to improve gene delivery efficiency in inflammatory environments.