Evidence map›Paper›PMID 22461906›Full record

ArticlePloS one2012

Activation of ERAD pathway by human hepatitis B virus modulates viral and subviral particle production.

Catalin Lazar, Alina Macovei, Stefana Petrescu, Norica Branza-Nichita

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed, 1 pooled it
3.2field-weighted citation impact, top 8% 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

41 citing papers in PubMed, 1 synthesis or guideline pooled it, 79 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Viruses Hijack ERAD to Regulate Their Replication and Propagation.International journal of molecular sciences · 2022
    Review
  9. Article
  10. Review
  11. Virus, Exosome, and MicroRNA: New Insights into Autophagy.Advances in experimental medicine and biology · 2022
    Article
  12. Review
  13. Review
  14. Article
  15. Review
  16. Review
  17. Review
  18. Article
  19. Diverse Functions of Autophagy in Liver Physiology and Liver Diseases.International journal of molecular sciences · 2019
    Review
  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

4 authors at 3 institutions in 2 countries.

Catalin LazarInstitute of Biochemistry of the Romanian Academy, Department of Viral Glycoproteins, Bucharest, Romania.
Alina Macovei
Stefana Petrescu
Norica Branza-Nichita
Romanian Academy · ROInstitute of Biochemistry · ROYonsei University · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Hepatitis B virus (HBV) belongs to the Hepadnaviridae family of enveloped DNA viruses. It was previously shown that HBV can induce endoplasmic reticulum (ER) stress and activate the IRE1-XBP1 pathway of the unfolded protein response (UPR), through the expression of the viral regulatory protein X (HBx). However, it remained obscure whether or not this activation had any functional consequences on the target genes of the UPR pathway. Of these targets, the ER degradation-enhancing, mannosidase-like proteins (EDEMs) are thought to play an important role in relieving the ER stress during UPR, by recognizing terminally misfolded glycoproteins and delivering them to the ER-associated degradation (ERAD). In this study, we investigated the role of EDEMs in the HBV life-cycle. We found that synthesis of EDEMs (EDEM1 and its homologues, EDEM2 and EDEM3) is significantly up-regulated in cells with persistent or transient HBV replication. Co-expression of the wild-type HBV envelope proteins with EDEM1 resulted in their massive degradation, a process reversed by EDEM1 silencing. Surprisingly, the autophagy/lysosomes, rather than the proteasome were involved in disposal of the HBV envelope proteins. Importantly, inhibition of the endogenous EDEM1 expression in HBV replicating cells significantly increased secretion of both, enveloped virus and subviral particles. This is the first report showing that HBV activates the ERAD pathway, which, in turn, reduces the amount of envelope proteins, possibly as a mechanism to control the level of virus particles in infected cells and facilitate the establishment of chronic infections.

Indexed as

Endoplasmic Reticulum-Associated Degradationalpha-MannosidaseAutophagyBlotting, WesternCalcium-Binding ProteinsCell Line, TumorGene ExpressionGlycoproteinsGreen Fluorescent ProteinsHEK293 CellsHepatitis B virusHep G2 CellsHost-Pathogen InteractionsHumansLysosomesMannosidasesalpha-MannosidaseCalcium-Binding ProteinsEDEM1 protein, humanEDEM2 protein, humanEDEM3 protein, humanGlycoproteinsGreen Fluorescent ProteinsMannosidasesMAP1LC3A protein, humanMembrane ProteinsMicrotubule-Associated Proteins

Identifiers

PMID22461906
PMCPMC3312915
OpenAlexW2069527559

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.