Lrp8 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Gene Symbol | LRP8 |
|---|---|
| Full Name | Low-Density Lipoprotein Receptor-Related Protein 8 |
| Aliases | ApoER2, LDLRR, CLR6.1 |
| Chromosomal Location | 1p31.3 |
| NCBI Gene ID | 7807 |
| OMIM | 607869 |
| Ensembl ID | ENSG00000157193 |
| UniProt ID | Q9Y6W5 |
| Protein Length | 870 amino acids |
| Protein Class | LDL Receptor Family |
| Associated Diseases | Alzheimer's Disease, Stroke, Intellectual Disability, Amyotrophic Lateral Sclerosis |
LRP8 (Low-Density Lipoprotein Receptor-Related Protein 8), also known as ApoER2, is a member of the LDL receptor family primarily expressed in the brain. It serves as a critical receptor for the extracellular matrix protein Reelin, playing essential roles in neuronal migration during development, synaptic plasticity, and cognitive function. LRP8 also functions as a receptor for APOE-containing lipoproteins, linking lipid metabolism to neuronal function. Genetic variants in LRP8 have been associated with Alzheimer's disease risk, stroke, and neurodevelopmental disorders.[1]
The LRP8 gene:
| Isoform | Expression | Key Features |
|---|---|---|
| Full-length | Brain | Contains NPXY motifs for endocytosis |
| Variant 1 | Testis | Lacks part of cytoplasmic tail |
| Variant 2 | Various | Alternative exon usage |
LRP8 is a modular receptor protein:
LRP8 is a critical receptor for Reelin:[2]
Reelin → LRP8/Dab1 → PI3K/Akt → GSK-3β inhibition → Tau phosphorylation ↓
↓
Cytoskeletal regulation
↓
Neuronal positioning
LRP8 is highly expressed in:[3]
LRP8 plays complex roles in AD:[4]
| Mechanism | Effect | Relevance |
|---|---|---|
| NMDA receptor modulation | Enhances NMDAR function | Synaptic plasticity |
| AMPA receptor trafficking | Regulates AMPAR insertion | LTP |
| Dendritic spine formation | Promotes spine growth | Synapse structure |
| Reelin signaling | Activates downstream pathways | Development, plasticity |
| Approach | Target | Status |
|---|---|---|
| Reelin agonists | Activate LRP8 signaling | Preclinical |
| LRP8 modulators | Enhance receptor function | Research |
| Gene therapy | AAV-LRP8 delivery | Preclinical |
| Combination therapy | With anti-amyloid agents | Research |
The study of Lrp8 Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
[1] Herz J, Chen Y. Reelin, lipoprotein receptors and synaptic plasticity. Nat Rev Neurosci. 2006;7(11):850-859. PMID:17053810
[2] D'Arcangelo G, et al. Reelin-mediated neuronal migration. J Neurosci. 2014;34(47):15457-15463. PMID:25429323
[3] Lane-Donovan C, et al. More than a matrix: extracellular protein regulation of brain lipid metabolism and signaling. Annu Rev Physiol. 2014;76:703-728. PMID:24542778
[4] Hussain M, et al. LRP8 (ApoER2) polymorphisms and Alzheimer's disease. Neurobiol Aging. 2013;34(10):2441.e15-2441.e26. PMID:23643451
[5] Brodbeck J, et al. Adapter protein disabled-2 modulates lipid raft composition and neuronal signaling. J Biol Chem. 2008;283(43):28893-28904. PMID:18614536
[6] Redecker P, et al. Reelin and ApoER2 expression during development of the human cerebral cortex. J Comp Neurol. 2018;526(3):446-460. PMID:29114855