Small Molecule Targets TMED9 and Promotes Lysosomal Degradation to Reverse Proteinopathy.
Activating Transcription Factor 6
/ metabolism
Animals
Benzamides
/ chemistry
Bridged Bicyclo Compounds
/ pharmacology
Epithelial Cells
/ cytology
Female
Frameshift Mutation
Heptanes
/ pharmacology
Humans
Imidazoline Receptors
/ antagonists & inhibitors
Induced Pluripotent Stem Cells
/ cytology
Kidney
/ cytology
Kidney Diseases
/ metabolism
Lysosomes
/ drug effects
Male
Mice
Mice, Transgenic
Mucin-1
/ chemistry
RNA Interference
RNA, Small Interfering
/ metabolism
Unfolded Protein Response
/ drug effects
Vesicular Transport Proteins
/ chemistry
COP vesicles
ER stress
Golgi apparatus
cargo receptor
endoplasmic reticulum
epithelial cells
kidney
organoids
secretory pathway
unfolded protein response
Journal
Cell
ISSN: 1097-4172
Titre abrégé: Cell
Pays: United States
ID NLM: 0413066
Informations de publication
Date de publication:
25 07 2019
25 07 2019
Historique:
received:
06
08
2018
revised:
19
04
2019
accepted:
28
06
2019
entrez:
27
7
2019
pubmed:
28
7
2019
medline:
28
4
2020
Statut:
ppublish
Résumé
Intracellular accumulation of misfolded proteins causes toxic proteinopathies, diseases without targeted therapies. Mucin 1 kidney disease (MKD) results from a frameshift mutation in the MUC1 gene (MUC1-fs). Here, we show that MKD is a toxic proteinopathy. Intracellular MUC1-fs accumulation activated the ATF6 unfolded protein response (UPR) branch. We identified BRD4780, a small molecule that clears MUC1-fs from patient cells, from kidneys of knockin mice and from patient kidney organoids. MUC1-fs is trapped in TMED9 cargo receptor-containing vesicles of the early secretory pathway. BRD4780 binds TMED9, releases MUC1-fs, and re-routes it for lysosomal degradation, an effect phenocopied by TMED9 deletion. Our findings reveal BRD4780 as a promising lead for the treatment of MKD and other toxic proteinopathies. Generally, we elucidate a novel mechanism for the entrapment of misfolded proteins by cargo receptors and a strategy for their release and anterograde trafficking to the lysosome.
Identifiants
pubmed: 31348885
pii: S0092-8674(19)30741-X
doi: 10.1016/j.cell.2019.07.002
pii:
doi:
Substances chimiques
ATF6 protein, human
0
Activating Transcription Factor 6
0
BRD4780
0
Benzamides
0
Bridged Bicyclo Compounds
0
Heptanes
0
Imidazoline Receptors
0
Mucin-1
0
NISCH protein, human
0
RNA, Small Interfering
0
TMED9 protein, human
0
Vesicular Transport Proteins
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
521-535.e23Subventions
Organisme : NIDDK NIH HHS
ID : R01 DK099465
Pays : United States
Commentaires et corrections
Type : CommentIn
Type : CommentIn
Type : CommentIn
Informations de copyright
Copyright © 2019 Elsevier Inc. All rights reserved.