Evidence map›Paper›PMID 24179149›Full record

ArticleJournal of lipid research2014

Endoplasmic reticulum stress impairs cholesterol efflux and synthesis in hepatic cells.

Clemens Röhrl, Karin Eigner, Katharina Winter, Melanie Korbelius, Sascha Obrowsky, Dagmar Kratky, Werner J Kovacs, Herbert Stangl

Open access · hybridAbstract read
In one paragraph

Article in Journal of lipid research, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
6.1field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

37 citing papers in PubMed, 71 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Review
  5. Article
  6. Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Chronic Fibrosis and Its Progression to Cancer.International journal of molecular sciences · 2022
    Article
  13. Review
  14. Article
  15. Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 2 countries.

Clemens RöhrlInstitute of Medical Chemistry, Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria.
Karin Eigner
Katharina Winter
Melanie Korbelius
Sascha Obrowsky
Dagmar Kratky
Werner J Kovacs
Herbert Stangl
Medical University of Vienna · ATMedical University of Graz · ATÉcole Polytechnique Fédérale de Lausanne · CH

Funding

Austrian Science Fund FWF P 22838Austrian Science Fund FWF P 25763
6 · The paper itself

Abstract

Metabolic disorders such as type 2 diabetes cause hepatic endoplasmic reticulum (ER) stress, which affects neutral lipid metabolism. However, the role of ER stress in cholesterol metabolism is incompletely understood. Here, we show that induction of acute ER stress in human hepatic HepG2 cells reduced ABCA1 expression and caused ABCA1 redistribution to tubular perinuclear compartments. Consequently, cholesterol efflux to apoA-I, a key step in nascent HDL formation, was diminished by 80%. Besides ABCA1, endogenous apoA-I expression was reduced upon ER stress induction, which contributed to reduced cholesterol efflux. Liver X receptor, a key regulator of ABCA1 in peripheral cells, was not involved in this process. Despite reduced cholesterol efflux, cellular cholesterol levels remained unchanged during ER stress. This was due to impaired de novo cholesterol synthesis by reduction of HMG-CoA reductase activity by 70%, although sterol response element-binding protein-2 activity was induced. In mice, ER stress induction led to a marked reduction of hepatic ABCA1 expression. However, HDL cholesterol levels were unaltered, presumably because of scavenger receptor class B, type I downregulation under ER stress. Taken together, our data suggest that ER stress in metabolic disorders reduces HDL biogenesis due to impaired hepatic ABCA1 function.

Indexed as

Endoplasmic Reticulum StressAnimalsATP Binding Cassette Transporter 1CholesterolGene ExpressionGene Expression RegulationGlycosylationHepatocytesHep G2 CellsHumansHydroxymethylglutaryl CoA ReductasesLipid MetabolismLiverLiver X ReceptorsMaleMiceABCA1 protein, humanATP Binding Cassette Transporter 1CholesterolHydroxymethylglutaryl CoA ReductasesLiver X ReceptorsOrphan Nuclear ReceptorsSREBF2 protein, humanSterol Regulatory Element Binding Protein 23-hydroxy-3-methylglutaryl- coenzyme A reductaseapolipoprotein A-IATP-binding cassette transporter A1HepG2high density lipoprotein

Identifiers

PMID24179149
PMCPMC3927476
OpenAlexW2110452002

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.