Evidence map›Paper›PMID 21680506›Full record

ArticleJournal of virology2011

The viral nucleoprotein determines Mx sensitivity of influenza A viruses.

Petra Zimmermann, Benjamin Mänz, Otto Haller, Martin Schwemmle, Georg Kochs

Open access · greenAbstract read
In one paragraph

Article in Journal of virology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 119 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
119citing papers in PubMed, 1 pooled it
6.4field-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

119 citing papers in PubMed, 1 synthesis or guideline pooled it, 188 citations in OpenAlex.

  1. Pooled it
  2. Influenza.Nature reviews. Disease primers · 2026
    Review
  3. In Vitro and Embryonic Evaluation of RecombinantPathogens (Basel, Switzerland) · 2026
    Article
  4. Article
  5. Article
  6. Review
  7. Human MX1 orchestrates the cytoplasmic sequestration of neosynthesized influenza A virus vRNPs.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  8. Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Review
  14. Article
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  16. Article
  17. Article
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  19. Review
  20. Article

59 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

5 authors at 1 institution in 1 country.

Petra ZimmermannDepartment of Virology, Institute for Medical Microbiology and Hygiene, University of Freiburg, Freiburg, Germany. georg.kochs@uniklinik-freiburg.de
Benjamin Mänz
Otto Haller
Martin Schwemmle
Georg Kochs
University of Freiburg · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Host restriction factors play a crucial role in preventing trans-species transmission of viral pathogens. In mammals, the interferon-induced Mx GTPases are powerful antiviral proteins restricting orthomyxoviruses. Hence, the human MxA GTPase may function as an efficient barrier against zoonotic introduction of influenza A viruses into the human population. Successful viruses are likely to acquire adaptive mutations allowing them to evade MxA restriction. We compared the 2009 pandemic influenza A virus [strain A/Hamburg/4/09 (pH1N1)] with a highly pathogenic avian H5N1 isolate [strain A/Thailand/1(KAN-1)/04] for their relative sensitivities to human MxA and murine Mx1. The H5N1 virus was highly sensitive to both Mx GTPases, whereas the pandemic H1N1 virus was almost insensitive. Substitutions of the viral polymerase subunits or the nucleoprotein (NP) in a polymerase reconstitution assay demonstrated that NP was the main determinant of Mx sensitivity. The NP of H5N1 conferred Mx sensitivity to the pandemic H1N1 polymerase, whereas the NP of pandemic H1N1 rendered the H5N1 polymerase insensitive. Reassortant viruses which expressed the NP of H5N1 in a pH1N1 genetic background and vice versa were generated. Congenic Mx1-positive mice survived intranasal infection with these reassortants if the challenge virus contained the avian NP. In contrast, they succumbed to infection if the NP of pH1N1 origin was present. These findings clearly indicate that the origin of NP determines Mx sensitivity and that human influenza viruses acquired adaptive mutations to evade MxA restriction. This also explains our previous observations that human and avian influenza A viruses differ in their sensitivities to Mx.

Indexed as

AnimalsDNA-Directed RNA PolymerasesGTP-Binding ProteinsHEK293 CellsHumansInfluenza A Virus, H1N1 SubtypeInfluenza A Virus, H5N1 SubtypeMiceMice, Inbred BALB CMutationMyxovirus Resistance ProteinsNIH 3T3 CellsNucleocapsid ProteinsReassortant VirusesRNA-Binding ProteinsViral Core ProteinsDNA-Directed RNA PolymerasesGTP-Binding ProteinsMX1 protein, humanMx1 protein, mouseMyxovirus Resistance ProteinsNP protein, Influenza A virusNucleocapsid ProteinsRNA-Binding ProteinsViral Core ProteinsViral Proteins

Identifiers

PMID21680506
PMCPMC3147989
OpenAlexW2045337113

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.