LDLR-related protein 10 (LRP10) regulates amyloid precursor protein (APP) trafficking and processing: evidence for a role in Alzheimer’s disease
<p>Abstract</p> <p>Background</p> <p>The Aβ peptide that accumulates in Alzheimer’s disease (AD) is derived from amyloid precursor protein (APP) following proteolysis by β- and γ-secretases. Substantial evidence indicates that alterations in APP trafficking within the s...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2012-06-01
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| Series: | Molecular Neurodegeneration |
| Subjects: | |
| Online Access: | http://www.molecularneurodegeneration.com/content/7/1/31 |
| _version_ | 1828729062270435328 |
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| author | Brodeur Julie Thériault Caroline Lessard-Beaudoin Mélissa Marcil Alexandre Dahan Sophie Lavoie Christine |
| author_facet | Brodeur Julie Thériault Caroline Lessard-Beaudoin Mélissa Marcil Alexandre Dahan Sophie Lavoie Christine |
| author_sort | Brodeur Julie |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>The Aβ peptide that accumulates in Alzheimer’s disease (AD) is derived from amyloid precursor protein (APP) following proteolysis by β- and γ-secretases. Substantial evidence indicates that alterations in APP trafficking within the secretory and endocytic pathways directly impact the interaction of APP with these secretases and subsequent Aβ production. Various members of the low-density lipoprotein receptor (LDLR) family have been reported to play a role in APP trafficking and processing and are important risk factors in AD. We recently characterized a distinct member of the LDLR family called LDLR-related protein 10 (LRP10) that shuttles between the trans-Golgi Network (TGN), plasma membrane (PM), and endosomes. Here we investigated whether LRP10 participates in APP intracellular trafficking and Aβ production.</p> <p>Results</p> <p>In this report, we provide evidence that LRP10 is a functional APP receptor involved in APP trafficking and processing. LRP10 interacts directly with the ectodomain of APP and colocalizes with APP at the TGN. Increased expression of LRP10 in human neuroblastoma SH-SY5Y cells induces the accumulation of mature APP in the Golgi and reduces its presence at the cell surface and its processing into Aβ, while knockdown of LRP10 expression increases Aβ production. Mutations of key motifs responsible for the recycling of LRP10 to the TGN results in the aberrant redistribution of APP with LRP10 to early endosomes and a concomitant increase in APP β-cleavage into Aβ. Furthermore, expression of LRP10 is significantly lower in the post-mortem brain tissues of AD patients, supporting a possible role for LRP10 in AD.</p> <p>Conclusions</p> <p>The present study identified LRP10 as a novel APP sorting receptor that protects APP from amyloidogenic processing, suggesting that a decrease in LRP10 function may contribute to the pathogenesis of Alzheimer’s disease.</p> |
| first_indexed | 2024-04-12T14:26:11Z |
| format | Article |
| id | doaj.art-539921f3d4884d09a59d8203df3234d4 |
| institution | Directory Open Access Journal |
| issn | 1750-1326 |
| language | English |
| last_indexed | 2024-04-12T14:26:11Z |
| publishDate | 2012-06-01 |
| publisher | BMC |
| record_format | Article |
| series | Molecular Neurodegeneration |
| spelling | doaj.art-539921f3d4884d09a59d8203df3234d42022-12-22T03:29:25ZengBMCMolecular Neurodegeneration1750-13262012-06-01713110.1186/1750-1326-7-31LDLR-related protein 10 (LRP10) regulates amyloid precursor protein (APP) trafficking and processing: evidence for a role in Alzheimer’s diseaseBrodeur JulieThériault CarolineLessard-Beaudoin MélissaMarcil AlexandreDahan SophieLavoie Christine<p>Abstract</p> <p>Background</p> <p>The Aβ peptide that accumulates in Alzheimer’s disease (AD) is derived from amyloid precursor protein (APP) following proteolysis by β- and γ-secretases. Substantial evidence indicates that alterations in APP trafficking within the secretory and endocytic pathways directly impact the interaction of APP with these secretases and subsequent Aβ production. Various members of the low-density lipoprotein receptor (LDLR) family have been reported to play a role in APP trafficking and processing and are important risk factors in AD. We recently characterized a distinct member of the LDLR family called LDLR-related protein 10 (LRP10) that shuttles between the trans-Golgi Network (TGN), plasma membrane (PM), and endosomes. Here we investigated whether LRP10 participates in APP intracellular trafficking and Aβ production.</p> <p>Results</p> <p>In this report, we provide evidence that LRP10 is a functional APP receptor involved in APP trafficking and processing. LRP10 interacts directly with the ectodomain of APP and colocalizes with APP at the TGN. Increased expression of LRP10 in human neuroblastoma SH-SY5Y cells induces the accumulation of mature APP in the Golgi and reduces its presence at the cell surface and its processing into Aβ, while knockdown of LRP10 expression increases Aβ production. Mutations of key motifs responsible for the recycling of LRP10 to the TGN results in the aberrant redistribution of APP with LRP10 to early endosomes and a concomitant increase in APP β-cleavage into Aβ. Furthermore, expression of LRP10 is significantly lower in the post-mortem brain tissues of AD patients, supporting a possible role for LRP10 in AD.</p> <p>Conclusions</p> <p>The present study identified LRP10 as a novel APP sorting receptor that protects APP from amyloidogenic processing, suggesting that a decrease in LRP10 function may contribute to the pathogenesis of Alzheimer’s disease.</p>http://www.molecularneurodegeneration.com/content/7/1/31LDLR-related protein 10 (LRP10)Amyloid precursor protein (APP)Amyloid beta (Aβ)Intracellular traffickingAlzheimer’s diseaseEndosomeTrans-Golgi network (TGN)Low density lipoprotein receptor (LDLR) |
| spellingShingle | Brodeur Julie Thériault Caroline Lessard-Beaudoin Mélissa Marcil Alexandre Dahan Sophie Lavoie Christine LDLR-related protein 10 (LRP10) regulates amyloid precursor protein (APP) trafficking and processing: evidence for a role in Alzheimer’s disease Molecular Neurodegeneration LDLR-related protein 10 (LRP10) Amyloid precursor protein (APP) Amyloid beta (Aβ) Intracellular trafficking Alzheimer’s disease Endosome Trans-Golgi network (TGN) Low density lipoprotein receptor (LDLR) |
| title | LDLR-related protein 10 (LRP10) regulates amyloid precursor protein (APP) trafficking and processing: evidence for a role in Alzheimer’s disease |
| title_full | LDLR-related protein 10 (LRP10) regulates amyloid precursor protein (APP) trafficking and processing: evidence for a role in Alzheimer’s disease |
| title_fullStr | LDLR-related protein 10 (LRP10) regulates amyloid precursor protein (APP) trafficking and processing: evidence for a role in Alzheimer’s disease |
| title_full_unstemmed | LDLR-related protein 10 (LRP10) regulates amyloid precursor protein (APP) trafficking and processing: evidence for a role in Alzheimer’s disease |
| title_short | LDLR-related protein 10 (LRP10) regulates amyloid precursor protein (APP) trafficking and processing: evidence for a role in Alzheimer’s disease |
| title_sort | ldlr related protein 10 lrp10 regulates amyloid precursor protein app trafficking and processing evidence for a role in alzheimer s disease |
| topic | LDLR-related protein 10 (LRP10) Amyloid precursor protein (APP) Amyloid beta (Aβ) Intracellular trafficking Alzheimer’s disease Endosome Trans-Golgi network (TGN) Low density lipoprotein receptor (LDLR) |
| url | http://www.molecularneurodegeneration.com/content/7/1/31 |
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