Cited by 69Alzheimer's disease research and treatmentsCellular transport and secretionDementia and Cognitive Impairment Research

SNX27 and SORLA Interact to Reduce Amyloidogenic Subcellular Distribution and Processing of Amyloid Precursor Protein

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Huang, Timothy Y., Zhao, Yingjun, Li, Xiaoguang, Wang, Xin, Tseng, I-Chu, Thompson, Robert, Tu, Shichun, Willnow, Thomas E. +2 more·2016·The Journal of Neuroscience

Abstract

UNLABELLED: Proteolytic generation of amyloidogenic amyloid β (Aβ) fragments from the amyloid precursor protein (APP) significantly contributes to Alzheimer's disease (AD). Although amyloidogenic APP proteolysis can be affected by trafficking through genetically associated AD components such as SORLA, how SORLA functionally interacts with other trafficking components is yet unclear. Here, we report that SNX27, an endosomal trafficking/recycling factor and a negative regulator of the γ-secretase complex, binds to the SORLA cytosolic tail to form a ternary complex with APP. SNX27 enhances cell surface SORLA and APP levels in human cell lines and mouse primary neurons, and depletion of SNX27 or SORLA reduces APP endosome-to-cell surface recycling kinetics. SNX27 overexpression enhances the generation of cell surface APP cleavage products such as soluble alpha-APP C-terminal fragment (CTFα) in a SORLA-dependent manner. SORLA-mediated Aβ reduction is attenuated by downregulation of SNX27. This indicates that an SNX27/SORLA complex functionally interacts to limit APP distribution to amyloidogenic compartments, forming a non-amyloidogenic shunt to promote APP recycling to the cell surface. SIGNIFICANCE STATEMENT: Many genes have been identified as risk factors for Alzheimer's disease (AD), and a large proportion of these genes function to limit production or toxicity of the AD-associated amyloid β (Aβ) peptide. Whether and how these genes precisely operate to limit AD onset remains an important question. We identify binding and trafficking interactions between two of these factors, SORLA and SNX27, and demonstrate that SNX27 can direct trafficking of SORLA and the Aβ precursor APP to the cell surface to limit the production of Aβ. Diversion APP to the cell surface through modulation of this molecular complex may represent a complimentary strategy for future development in AD treatment.

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Crossref · 10.1523/jneurosci.0206-16.2016

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  • SNX27 limits Aβ production through interaction with PS1 destabilizing the γ-secretase complex, and enhances non-amyloidogenic APP processing by promoting APP recycling via SORLA.

    “SNX27 regulates APP processing via two pathways: SNX27 can limit Aβ production through the interaction with PS1 which leads to destabilization of γ-secretase complex; in addition, SNX27 can enhance non-amyloidogenic APP processing through promoting the recycling of APP to the cell surface via interacting with SORLA [47, 48].”

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Authors
Huang, T. Y., Zhao, Y., Li, X., Wang, X., Tseng, I.-C., Thompson, R., Tu, S., Willnow, T. E., Zhang, Y.-W., & Xu, H.
Affiliations
  • Sanford Burnham Prebys Medical Discovery Institute (US)
  • Guangzhou University of Chinese Medicine (CN)
  • Max Delbrück Center (DE)
Venue
The Journal of Neuroscience
Published
2016-07-27
Volume
36
Issue
30
Pages
7996-8011
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2489838484
Cited by
69
References
39
Citations by year
2026: 7 · 2025: 10 · 2024: 9 · 2023: 4 · 2022: 6 · 2021: 7 · 2020: 9 · 2019: 5 · 2018: 5 · 2017: 5 · 2016: 2
FWCI
4.56
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • MDC Repository (Max-Delbrueck-Center for Molecular Medicine) (acceptedVersion)
Funders
  • Alzheimer's Association
  • National Institutes of Health
  • National Institute on Aging (R01AG044420, R01AG038710, R01AG021173, R21AG049247)
  • National Institute of Neurological Disorders and Stroke (R01NS046673)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
SNX27, SorLA, amyloid precursor protein, amyloid-beta, Alzheimer's disease, gamma-secretase, ternary protein complex
MeSH terms
Amyloid, Animals, Cerebral Cortex, Female, Gene Expression Regulation, Humans, Neurons, Protein Binding, Receptors, LDL, Subcellular Fractions, Amyloid beta-Protein Precursor, Protein Transport, Membrane Transport Proteins, Mice, HEK293 Cells, Amyloidogenic Proteins, Sorting Nexins

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