Cited by 90Cellular transport and secretionNeuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatments

Vps35-dependent recycling of Trem2 regulates microglial function

Yin, Jie, Liu, Xiaocui, He, Qing, Zhou, Lujun, Yuan, Zengqiang, Zhao, Siqi·2016·Traffic

Abstract

Triggering receptor expressed on myeloid cells 2 (Trem2), an immune-modulatory receptor, is preferentially expressed in microglia of central nervous system. Trem2 might be involved in the development of Alzheimer's disease (AD) through regulating the inflammatory responses and phagocytosis of microglia. However, the intracellular trafficking of Trem2 remains unclear. In this study, we showed that Trem2 in the plasma membrane underwent endocytosis and recycling. Trem2 is internalized in a clathrin-dependent manner and then recycled back to the plasma membrane through vacuolar protein sorting 35 (Vps35), the key component of cargo recognition core of retromer complex, but not Rab11. When Vps35 is knocked down, Trem2 accumulated in the lysosomes but was not degraded. More importantly, Vps35 deficiency leads to excessive lipopolysaccharide (LPS)-induced inducible nitric oxide synthase (iNOS) expression and IL-6 production, which can be abolished by Trem2 overexpression. Furthermore, R47H Trem2, an AD-associated mutant, failed to interact with Vps35 and became unstable compared with wild-type Trem2. Our study suggests that Vps35/retromer is responsible for recycling of Trem2 in the regulation of microglial function such as proinflammatory responses, whereas R47H mutation impairs Trem2 trafficking, which might contribute to AD.

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Crossref · 10.1111/tra.12451

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Authors
Yin, J., Liu, X., He, Q., Zhou, L., Yuan, Z., & Zhao, S.
Affiliations
  • Chinese Academy of Sciences (CN)
  • Qingdao Mental Health Center (CN)
Corresponding author
Zhao, Siqi
Venue
Traffic
Publisher
Wiley
Published
2016-11
Volume
17
Issue
12
Pages
1286-1296
ISSN
  • 1398-9219 (ISSN-L)
  • 1600-0854
OpenAlex
W2525887216
Cited by
90
References
43
Citations by year
2026: 6 · 2025: 5 · 2024: 7 · 2023: 19 · 2022: 13 · 2021: 7 · 2020: 11 · 2019: 7 · 2018: 11 · 2017: 4
FWCI
5.05
Type
journal article
Language
en
Open access
closed
Locations
  • Traffic (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (81125010, 81030025, 81600997)
  • Chinese Academy of Sciences
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
TREM2, VPS35, retromer complex, microglia, protein recycling, endocytosis, clathrin-mediated endocytosis, lysosomal accumulation, Alzheimer's disease, lipopolysaccharide, inducible nitric oxide synthase, interleukin-6, neuroinflammation, protein trafficking
MeSH terms
Alzheimer Disease, Animals, Cell Membrane, Endocytosis, HeLa Cells, Humans, Lipopolysaccharides, Lysosomes, Membrane Glycoproteins, Mice, Inbred C57BL, Mutation, Phagocytosis, Receptors, Immunologic, Interleukin-6, Microglia, Protein Transport, Vesicular Transport Proteins, Mice, Nitric Oxide Synthase Type II, HEK293 Cells

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