Cited by 89Cellular transport and secretionCholesterol and Lipid MetabolismLysosomal Storage Disorders Research

The DOI matches its Crossref record; 69 of the 71 references it cites were found in a registry or an index.

NDRG1 functions in LDL receptor trafficking by regulating endosomal recycling and degradation

Abstract

N-myc downstream-regulated gene 1 (NDRG1) mutations cause Charcot-Marie-Tooth Disease type 4D (CMT4D). However, the cellular function of NDRG1 and how it causes CMT4D are poorly understood. We report that NDRG1 silencing in epithelial cells results in decreased uptake of low-density lipoprotein (LDL) due to reduced LDL receptor (LDLR) abundance at the plasma membrane (PM). This is accompanied by the accumulation of LDLR in enlarged EEA1-positive endosomes that contain numerous intraluminal vesicles and sequester ceramide. Concomitantly, LDLR ubiquitylation is increased but its degradation is reduced and ESCRT (Endosomal sorting complex required for transport) proteins are downregulated. Co-depletion of IDOL (Inducible degrader of the LDLR), which ubiquitylates the LDLR and promotes its degradation, rescues PM LDLR levels and LDL uptake. In oligodendrocytes, Ndrg1 silencing not only results in reduced LDL uptake but also downregulation of the oligodendrocyte differentiation factor Olig2. Both phenotypes are rescued by co-silencing of Idol, suggesting that ligand uptake via LDLR family members controls oligodendrocyte differentiation. These findings identify NDRG1 as a novel regulator of multivesicular body formation and endosomal LDLR trafficking. The deficiency of functional NDRG1 in CMT4D may impair lipid processing and differentiation of myelinating cells.

Overview

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Crossref · 10.1242/jcs.128132

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69 of 69 references verified0 citation errors · 0 not checkable

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  • The receptors for LDL (LDLR) and transferrin receptor (TFR) are both endocytosed from the cell surface via clathrin-coated vesicles and transported through intracellular recycling pathways.

    “The receptors for LDL (LDLR) and transferrin receptor (TFR) are both endocytosed from the cell surface via clathrin-coated vesicles and transported through intracellular recycling pathways (14, 15, 16, 17, 18, 19, 20).”

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Metadata

Authors
Pietiäinen, V., Vassilev, B., Blom, T., Wang, W., Nelson, J., Bittman, R., Bäck, N., Zelcer, N., & Ikonen, E.
Affiliations
  • University of Helsinki (FI)
  • Amsterdam UMC Location University of Amsterdam (NL)
  • Queens College, CUNY (US)
Corresponding author
Pietiäinen, Vilja
Venue
Journal of Cell Science
Published
2013-01-01
Volume
126
Issue
Pt 17
Pages
3961-71
ISSN
  • 0021-9533 (ISSN-L)
  • 1477-9137
OpenAlex
W2083088625
Cited by
89
References
71
Citations by year
2026: 4 · 2025: 6 · 2024: 2 · 2023: 6 · 2022: 10 · 2021: 7 · 2020: 15 · 2019: 12 · 2018: 3 · 2017: 7 · 2016: 8 · 2015: 5 · 2014: 3 · 2013: 1
FWCI
1.86
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Cell Science (publishedVersion)
  • PubMed (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
  • Pure Amsterdam UMC (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Cholesterol and Lipid Metabolism
  • Health Sciences › Medicine › Genetics (clinical) › Lysosomal Storage Disorders Research
Keywords
NDRG1, LDL receptor, LDL uptake, endosomal recycling, multivesicular bodies, ESCRT, ubiquitination, idols, ceramide, oligodendrocyte differentiation, Olig2, lipid processing, myelination
MeSH terms
Oligodendrocyte Transcription Factor 2, N-myc Downstream-Regulated Gene 1 Protein, Androstenes, Animals, Cell Differentiation, Cell Membrane, Charcot-Marie-Tooth Disease, Endocytosis, Humans, Lipoproteins, LDL, Nerve Tissue Proteins, Receptors, LDL, Endosomes, Refsum Disease, Down-Regulation, Cell Cycle Proteins, GTP-Binding Proteins, Protein Transport, Vesicular Transport Proteins, RNA Interference, RNA, Small Interfering, Ubiquitin-Protein Ligases, Cell Line, Tumor, Intracellular Signaling Peptides and Proteins, Mice, Basic Helix-Loop-Helix Proteins, Ubiquitination, Endosomal Sorting Complexes Required for Transport, HEK293 Cells

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