Evidence map›Paper›PMID 34154422›Full record

ArticlemBio2021

Phase Variation in HMW1A Controls a Phenotypic Switch in Haemophilus influenzae Associated with Pathoadaptation during Persistent Infection.

Ariadna Fernández-Calvet, Begoña Euba, Celia Gil-Campillo, Arancha Catalan-Moreno, Javier Moleres, Sara Martí, Alexandra Merlos, Jeroen D Langereis, Francisco García-Del Portillo, Lauren O Bakaletz and 6 more

Open access · goldAbstract read
In one paragraph

Article in mBio, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
1.8field-weighted citation impact, top 15% 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

15 citing papers in PubMed, 17 citations in OpenAlex.

  1. Journal of bacteriology · 2026
    Review
  2. Cell wall remodeling-dependent morphotype switch inProceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  3. Frontiers in cellular and infection microbiology · 2026
    Article
  4. Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Non-typeableFrontiers in cellular and infection microbiology · 2023
    Article
  13. Article
  14. Gene Expression Regulation in Airway Pathogens: Importance for Otitis Media.Frontiers in cellular and infection microbiology · 2022
    Review
  15. Biofilm aggregates and the host airway-microbial interface.Frontiers in cellular and infection microbiology · 2022
    Review
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

16 authors at 8 institutions in 3 countries.

Ariadna Fernández-CalvetInstituto de Agrobiotecnología, Consejo Superior de Investigaciones Científicas (IdAB-CSIC)-Gobierno de Navarra, Mutilva, Spain.
Begoña EubaInstituto de Agrobiotecnología, Consejo Superior de Investigaciones Científicas (IdAB-CSIC)-Gobierno de Navarra, Mutilva, Spain.
Celia Gil-CampilloInstituto de Agrobiotecnología, Consejo Superior de Investigaciones Científicas (IdAB-CSIC)-Gobierno de Navarra, Mutilva, Spain.
Arancha Catalan-MorenoInstituto de Agrobiotecnología, Consejo Superior de Investigaciones Científicas (IdAB-CSIC)-Gobierno de Navarra, Mutilva, Spain.
Javier MoleresInstituto de Agrobiotecnología, Consejo Superior de Investigaciones Científicas (IdAB-CSIC)-Gobierno de Navarra, Mutilva, Spain.
Sara MartíCentro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Madrid, Spain.
Alexandra MerlosDepartment of Pathology and Experimental Therapeutics, IDIBELL-University of Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain.
Jeroen D LangereisSection Pediatric Infectious Diseases, Laboratory of Medical Immunology, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands.
Francisco García-Del PortilloLaboratorio de Patógenos Bacterianos Intracelulares, Centro Nacional de Biotecnología (CNB)-CSIC, Madrid, Spain.
Lauren O BakaletzCenter for Microbial Pathogenesis, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA.
Garth D EhrlichDepartment of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA.
Eric A PorschDepartment of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.
Margarita MenéndezCentro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Madrid, Spain.
Joshua C MellDepartment of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA.
Alejandro Toledo-AranaInstituto de Agrobiotecnología, Consejo Superior de Investigaciones Científicas (IdAB-CSIC)-Gobierno de Navarra, Mutilva, Spain.
Junkal GarmendiaInstituto de Agrobiotecnología, Consejo Superior de Investigaciones Científicas (IdAB-CSIC)-Gobierno de Navarra, Mutilva, Spain.
Consejo Superior de Investigaciones Científicas · ESBellvitge University Hospital · ESInstitute for Molecular Medicine · USCentro de Investigación Biomédica en Red de Enfermedades Respiratorias · ESCentro Nacional de Biotecnología · ESChildren's Hospital of Philadelphia · USNationwide Children's Hospital · USRadboud University Nijmegen · NL

Funding

MOLECULAR ANALYSIS OF PATHOGENS IN OTITIS MEDIA BY PCRR01DC002148 · NIDCD · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI EHRLICH, GARTH D. · 1994 to 2017
$6.5M
NIDCD NIH HHS R01 DC002148
6 · The paper itself

Abstract

Genetic variants arising from within-patient evolution shed light on bacterial adaptation during chronic infection. Contingency loci generate high levels of genetic variation in bacterial genomes, enabling adaptation to the stringent selective pressures exerted by the host. A significant gap in our understanding of phase-variable contingency loci is the extent of their contribution to natural infections. The human-adapted pathogen nontypeable Haemophilus influenzae (NTHi) causes persistent infections, which contribute to underlying disease progression. The phase-variable high-molecular-weight (HMW) adhesins located on the NTHi surface mediate adherence to respiratory epithelial cells and, depending on the allelic variant, can also confer high epithelial invasiveness or hyperinvasion. In this study, we characterize the dynamics of HMW-mediated hyperinvasion in living cells and identify a specific HMW binding domain shared by hyperinvasive NTHi isolates of distinct pathological origins. Moreover, we observed that HMW expression decreased over time by using a longitudinal set of persistent NTHi strains collected from chronic obstructive pulmonary disease (COPD) patients, resulting from increased numbers of simple-sequence repeats (SSRs) downstream of the functional P2

Indexed as

Genetic VariationGenome, BacterialAdaptation, PhysiologicalAdhesins, BacterialBacterial AdhesionBiofilmsHaemophilus InfectionsHaemophilus influenzaeHumansPromoter Regions, GeneticAdhesins, BacterialHMW1 protein, bacteriaallelic variantbiofilmchronic obstructive pulmonary disease (COPD)epithelial hyperinvasionHaemophilus influenzaehigh-molecular-weight (HMW)lifestyle switchpathoadaptationpersistencephase variation

Identifiers

PMID34154422
PMCPMC8262952
OpenAlexW3175083906

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.