Clusterin Is a Ligand for Apolipoprotein E Receptor 2 (ApoER2) and Very Low Density Lipoprotein Receptor (VLDLR) and Signals via the Reelin-signaling Pathway
Clusterin Is a Ligand for Apolipoprotein E Receptor 2 (ApoER2) and Very Low Density Lipoprotein Receptor (VLDLR) and Signals via the Reelin-signaling Pathway
Clusterin, also known as apolipoprotein J, is a multifunctional glycoprotein with the capacity to interact with a wide range of molecules. Although clusterin has been implicated in a broad spectrum of physiological and pathological processes, such as Alzheimer disease or cancer, its precise functions remain elusive. Here we report, that clusterin binds to apolipoprotein E receptor 2 (ApoER2) and very low density lipoprotein receptor (VLDLR) and is internalized by cells expressing either one of these receptors. Binding of clusterin to these receptors triggers a Reelin-like signal in cells expressing disabled-1 (Dab1). It induces phosphorylation of Dab1, which leads to activation of PI3K/Akt and n-cofilin. Cell proliferation and neuroblast chain formation in subventricular zone (SVZ) explants are compromised when clusterin, which is present in the subventricular zone, is blocked in vitro. These data suggest that in the subventricular zone where Reelin is not present but ApoER2, VLDLR, and Dab1, clusterin might be involved in maintaining neurogenesis in vivo.
- Medical University of Vienna Austria
- Max F. Perutz Laboratories Austria
Extracellular Matrix Proteins, Cell Adhesion Molecules, Neuronal, Neurogenesis, Serine Endopeptidases, Midline Thalamic Nuclei, Nerve Tissue Proteins, Mice, Reelin Protein, Clusterin, HEK293 Cells, Receptors, LDL, NIH 3T3 Cells, Animals, Humans, Cells, Cultured, LDL-Receptor Related Proteins, Cell Proliferation, Signal Transduction
Extracellular Matrix Proteins, Cell Adhesion Molecules, Neuronal, Neurogenesis, Serine Endopeptidases, Midline Thalamic Nuclei, Nerve Tissue Proteins, Mice, Reelin Protein, Clusterin, HEK293 Cells, Receptors, LDL, NIH 3T3 Cells, Animals, Humans, Cells, Cultured, LDL-Receptor Related Proteins, Cell Proliferation, Signal Transduction
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