LRP1

Low-density lipoprotein receptor-related protein 1 (LRP1) is a multifunctional endocytic and signaling receptor of the LDL receptor family that regulates lipoprotein metabolism, protease clearance, cellular signaling, and tissue homeostasis across multiple organ systems^[1][2]. Mechanistically, LRP1 couples rapid ligand internalization with signal transduction, allowing coordinated control of extracellular protein turnover and intracellular responses involved in cell survival, migration, inflammation, and vascular biology^[1][2]. Through its broad ligand repertoire, LRP1 participates in key biological processes including endocytosis, phagocytosis, and receptor-mediated clearance pathways that maintain physiological balance in the liver, vasculature, and central nervous system^[1][2]. In disease contexts, LRP1 has been extensively studied in neurodegenerative disorders because it contributes to amyloid-β (Aβ) homeostasis through cellular uptake, lysosomal trafficking, and clearance mechanisms^[3][4]. Experimental evidence demonstrates that LRP1-mediated endocytosis promotes neuronal Aβ42 uptake and accumulation within lysosomal compartments, highlighting a central role in neuronal Aβ metabolism^[3]. LRP1 is also implicated in vascular disease, inflammation, and tissue remodeling through its ability to integrate endocytic and signaling functions within a single receptor system^[1][2]. Compared with related LDL receptor family members, LRP1 is distinguished by its exceptionally broad ligand-binding capacity and dual role as both a scavenger receptor and signaling receptor, enabling regulation of diverse physiological pathways^[1][2]. Consequently, genetic manipulation of LRP1 has become a widely used experimental approach for investigating receptor-mediated transport, neurodegeneration, vascular biology, and cell-signaling mechanisms^[1][3][4].