Evidence map›Paper›PMID 22171262›Full record

ArticleJournal of virology2012

Hepatitis C virus proteins inhibit C3 complement production.

Budhaditya Mazumdar, Hangeun Kim, Keith Meyer, Sandip K Bose, Adrian M Di Bisceglie, Ratna B Ray, Ranjit Ray

Open access · bronzeAbstract read
In one paragraph

Article in Journal of virology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

50 citing papers in PubMed, 86 citations in OpenAlex.

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  18. Interactions of viruses and the humoral innate immune response.Clinical immunology (Orlando, Fla.) · 2020
    Review
  19. In the Crosshairs: RNA Viruses OR Complement?Frontiers in immunology · 2020
    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

7 authors at 1 institution in 1 country.

Budhaditya MazumdarDepartments of Internal Medicine, Saint Louis University, Saint Louis, Missouri, USA.
Hangeun Kim
Keith Meyer
Sandip K Bose
Adrian M Di Bisceglie
Ratna B Ray
Ranjit Ray
Saint Louis University · US

Funding

Virology and Smallpox VaccinationsU54AI057160 · NIAID · WASHINGTON UNIVERSITY · PI RAY, RANJIT · 2003 to 2013
$80.9M
Mechanisms of Liver Disease Progression by Hepatitis C VirusR01DK080812 · NIDDK · SAINT LOUIS UNIVERSITY · PI RAY, RANJIT · 2009 to 2013
$1.6M
QUALITATIVE NATURE OF ANTIBODIES TO HCV GLYCOPROTEIN SUBUNIT VACCINE IN HUMANSR01AI068769 · NIAID · SAINT LOUIS UNIVERSITY · PI RAY, RANJIT · 2006 to 2009
$1.3M
NIAID NIH HHS AI068769NIAID NIH HHS R01 AI068769NIAID NIH HHS U54 AI057160NIAID NIH HHS U54-AI057160NIDDK NIH HHS DK80812NIDDK NIH HHS R01 DK080812
6 · The paper itself

Abstract

The third component of human complement (C3) plays a central role in innate immune function as its activation is required to trigger classical as well as alternative complement pathways. In this study, we have observed that sera from patients chronically infected with hepatitis C virus (HCV) displayed significantly lower C3 levels than sera from healthy individuals. Liver biopsy specimens from the same patients also exhibited lower C3 mRNA expression than liver tissues from healthy donors. C3 mRNA level was reduced in hepatocytes upon infection with cell culture-grown HCV genotype 1a or 2a in vitro. Further analysis suggested that HCV core protein displayed a weak repression of C3 promoter activity by downregulating the transcription factor farnesoid X receptor (FXR). On the other hand, HCV NS5A protein strongly downregulated C3 promoter activity at the basal level or in the presence of interleukin-1β (IL-1β) as an inducer. In addition, the expression of the transcription factor CAAT/enhancer binding protein beta (C/EBP-β), which binds to the IL-1/IL-6 response element in the C3 promoter, was inhibited in liver biopsy specimens. Furthermore, expression of C/EBP-β was reduced in hepatocytes infected with cell culture-grown HCV, as well as in hepatocytes transfected with the NS5A genomic region of HCV. Together, these results underscore the role of HCV NS5A protein in impairing innate immune function.

Indexed as

Down-RegulationAnimalsCell Line, TumorComplement C3Gene Expression RegulationHepacivirusHepatitis CHumansMalePromoter Regions, GeneticRNA-Dependent RNA PolymeraseViral Core ProteinsViral Nonstructural ProteinsComplement C3NS-5 protein, hepatitis C virusRNA-Dependent RNA PolymeraseViral Core ProteinsViral Nonstructural Proteins

Identifiers

PMID22171262
PMCPMC3302406
OpenAlexW2139593820

What OpenQuestion holds

Textmetadata
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.