Evidence map›Paper›PMID 12947043›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2003

The EBV nuclear antigen 1 (EBNA1) enhances B cell immortalization several thousandfold.

Sibille Humme, Gilbert Reisbach, Regina Feederle, Henri-Jacques Delecluse, Kristine Bousset, Wolfgang Hammerschmidt, Aloys Schepers

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 105 papers.

0numbers the graph read from it
0cells of the map it votes in
105citing papers in PubMed
4.9field-weighted citation impact, top 4% 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

105 citing papers in PubMed, 209 citations in OpenAlex.

  1. Review
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  7. Multiple sclerosis and infection: history, EBV, and the search for mechanism.Microbiology and molecular biology reviews : MMBR · 2025
    Review
  8. Review
  9. Article
  10. Prevalence of Epstein Barr Virus and Herpes Simplex Virus Among Human Papillomavirus Negative Oral Cancer Patients: A Cross-Sectional Study from South India.Indian journal of otolaryngology and head and neck surgery : official publication of the Association of Otolaryngologists of India · 2024
    Article
  11. Review
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  15. Article
  16. Article
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45 more citing papers are in PubMed but not listed here.

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.

Sibille HummeDepartment of Gene Vectors, GSF-National Research Center for Environment and Health, Marchioninistrasse 25, 81377 Munich, Germany.
Gilbert Reisbach
Regina Feederle
Henri-Jacques Delecluse
Kristine Bousset
Wolfgang Hammerschmidt
Aloys Schepers
University of Birmingham · GB

Funding

Visualizing EBV and HCMV DNA Dynamics During InfectionP01CA022443 · NCI · UNIVERSITY OF WISCONSIN-MADISON · PI WILLIAM M. SUGDEN · 1985 to 2026
$53.1M
Genetic Analysis of EBV's Immortalizing GenesR01CA070723 · NCI · UNIVERSITY OF WISCONSIN-MADISON · PI SUGDEN, WILLIAM M. · 1996 to 2017
$4.6M
NCI NIH HHS CA22443NCI NIH HHS CA70723NCI NIH HHS P01 CA022443NCI NIH HHS R01 CA070723
6 · The paper itself

Abstract

The Epstein-Barr virus (EBV) nuclear antigen 1 (EBNA1) is one of the earliest viral proteins expressed after infection and is the only latent protein consistently expressed in viral-associated tumors. EBNA1's crucial role in viral DNA replication, episomal maintenance, and partitioning is well examined whereas its importance for the immortalization process and the tumorgenicity of EBV is unclear. To address these open questions, we generated, based on the maxi-EBV system, an EBNA1-deficient EBV mutant and used this strain to infect primary human B cells. Surprisingly, lymphoblastoid cell lines (LCL) emerged from these experiments, although with very low frequency. These cell lines were indistinguishable from normal LCLs with respect to proliferation and growth conditions. A detailed analysis indicated that the entire viral DNA was integrated into the cellular genome. At least 5 of the 11 latent EBV proteins were expressed, indicating the integrity of the EBV genome. EBNA1-positive and DeltaEBNA1-EBV-LCLs were injected into severe combined immunodeficient (SCID) mice to examine their tumorgenicity in comparison. Both groups supported tumor growth, indicating that EBNA1 is not mandatory for EBV's oncogenic potential. The results shown provide genetic evidence that EBNA1 is not essential to establish LCLs but promotes the efficiency of this process significantly.

Indexed as

Blotting, SouthernBlotting, WesternB-LymphocytesCell LineCell Transformation, ViralDNA, ViralEpstein-Barr Virus Nuclear AntigensHerpesvirus 4, HumanHumansIn Situ Hybridization, FluorescencePlasmidsDNA, ViralEBV-encoded nuclear antigen 1Epstein-Barr Virus Nuclear Antigens

Identifiers

PMID12947043
PMCPMC196914
OpenAlexW2128179579

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.