Low-density lipoprotein receptor-related protein 3 (LRP3)

**Low-density lipoprotein receptor-related protein 3 (LRP3)** is a protein-coding gene and receptor belonging to the LDL receptor family[3]. LRP3 is predicted to be a membrane protein potentially involved in the internalization of lipophilic molecules and signal transduction, although it does not bind classical ligands like VLDL or LRPAP1[3]. Expression studies indicate roles in regulating fat cell and osteoblast differentiation. In the nervous system, LRP3 is regulated by ApoER2/Reelin signaling and influences amyloid precursor protein (APP) processing and Aβ peptide levels, suggesting involvement in Alzheimer's disease pathology; both mRNA and protein levels of LRP3 are decreased in brains with AD-related pathology[1]. The exact physiological functions and therapeutic relevance are incompletely characterized. Key scientific insights: - LRP3 is a bona fide member of the LDL receptor family, distinct from NLRP3 or other similarly named proteins[1][3]. - It is implicated in cellular endocytosis and the regulation of APP, with potential disease relevance in neurodegeneration, notably Alzheimer's disease[1]. - No drugs or pharmacological modulators for LRP3 are currently characterized, and mechanisms of action for putative therapeutics remain speculative[3]. - LRP3 also has roles reported in metabolic tissues (fat, muscle, bone), but receptor-specific signaling pathways are still under investigation[3].

Other names

LRP3LRP-3hLRp105105 kDa low-density lipoprotein receptor-related proteinCTD-2540B15.13

Mechanisms remain undetermined due to lack of specific pharmacological agents; if targeted, actions would likely include modulation of APP processing or receptor-mediated endocytosis[1]