Evidence map›Paper›PMID 22240483›Full record

ArticleGastroenterology2012

Estrogen receptor α represses transcription of HBV genes via interaction with hepatocyte nuclear factor 4α.

Sheng-Han Wang, Shiou-Hwei Yeh, Wei-Hsiang Lin, Kun-Huei Yeh, Quan Yuan, Ning-Shao Xia, Ding-Shinn Chen, Pei-Jer Chen

Abstract read
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In one paragraph

Article in Gastroenterology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed, 1 pooled it
6.2field-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

73 citing papers in PubMed, 1 synthesis or guideline pooled it, 133 citations in OpenAlex.

  1. Pooled it
  2. Review
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  4. Article
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  7. Article
  8. Article
  9. Estrogen and viral infection.Frontiers in immunology · 2025
    Review
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13 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 2 countries.

Sheng-Han WangDepartment of Microbiology, National Taiwan University College of Medicine, Taipei, Taiwan.
Shiou-Hwei Yeh
Wei-Hsiang Lin
Kun-Huei Yeh
Quan Yuan
Ning-Shao Xia
Ding-Shinn Chen
Pei-Jer Chen
National Taiwan University · TWXiamen University · CNNational Taiwan University Hospital · TW

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND &

aimsWomen with hepatitis B virus (HBV) infection usually have lower viral loads than men, reducing their risk of liver cancer. There are 2 androgen-responsive elements in the HBV enhancer I that contribute to higher viral titers in men. We investigated whether and how estrogen signaling affects progression of HBV infection.

methodsOvariectomy and estrogen supplementation were used to evaluate the effect of estrogen on HBV titers in transgenic mice with replicating HBV in hepatocytes. The effect of estrogen signaling on transcription of HBV genes, and the mechanisms of regulation, were studied in HepG2 cells.

resultsHBV titers increased in female mice after ovariectomy and decreased in male mice supplemented with estrogen. Hepatic expression of estrogen receptor (ER)-α was increased by estrogen exposure. In HepG2 cells, up-regulation of ER-α reduced HBV transcription, which required a specific region within enhancer I. Direct DNA binding of ER-α and histone deacetylase activity were not required for ER-α-mediated repression of HBV genes. Overexpression of hepatocyte nuclear factor (HNF)-4α, which binds to this region, overcame the repressive effect of ER-α. ER-α did not repress transcription of an HBV replicon with a mutant HNF-4α binding site within enhancer I. Coimmunoprecipitation assays showed an interaction between ER-α and HNF-4α; this interaction prevented HNF-4α binding to enhancer I and activation of HBV transcription.

conclusionsEstrogen can repress transcription of HBV genes by up-regulating ER-α, which interacts with and alters binding of HNF-4α to the HBV enhancer I. These findings might account for the lower viral load and reduced incidence of liver cancer in HBV-infected women than men.

Indexed as

Gene Expression Regulation, ViralTranscription, GeneticAnimalsBinding SitesDNA, ViralDrug ImplantsEstrogen Receptor alphaEstrogen Replacement TherapyEstrogensFemaleHepatitis B virusHepatocyte Nuclear Factor 4HepatocytesHep G2 CellsHistone DeacetylasesHumansDNA, ViralDrug ImplantsESR1 protein, humanEstrogen Receptor alphaEstrogensHepatocyte Nuclear Factor 4Histone DeacetylasesHNF4A protein, humanHnf4a protein, mouseRNA, Messenger

Identifiers

PMID22240483
OpenAlexW1988032963

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.