Evidence map›Paper›PMID 24866804›Full record

ArticleInfection and immunity2014

Plasmid CDS5 influences infectivity and virulence in a mouse model of Chlamydia trachomatis urogenital infection.

K H Ramsey, J H Schripsema, B J Smith, Y Wang, B C Jham, K P O'Hagan, N R Thomson, A K Murthy, R J Skilton, P Chu and 1 more

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
3.5field-weighted citation impact, top 8% 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

30 citing papers in PubMed, 37 citations in OpenAlex.

  1. Plasmid-encoded Pgp3 protein enhances the infectivity ofZhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences · 2026
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  2. Study Models forMicroorganisms · 2025
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  3. Diverse animal models forFrontiers in microbiology · 2024
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  4. Review
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  7. Plasmid-mediated virulence inFrontiers in cellular and infection microbiology · 2023
    Review
  8. Article
  9. Completing the Genome Sequence ofPathogens (Basel, Switzerland) · 2021
    Article
  10. A Nonsurgical Embryo Transfer Technique for Fresh and Cultured Blastocysts in Rats.Journal of the American Association for Laboratory Animal Science : JAALAS · 2020
    Article
  11. Article
  12. Article
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  14. The multiple functions of the numerousMicrobial cell (Graz, Austria) · 2019
    Review
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  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

11 authors at 3 institutions in 2 countries.

K H RamseyDepartment of Microbiology & Immunology, Chicago College of Osteopathic Medicine, Illinois Midwestern University, Downers Grove, Illinois, USA kramse@midwestern.edu.
J H SchripsemaDepartment of Microbiology & Immunology, Chicago College of Osteopathic Medicine, Illinois Midwestern University, Downers Grove, Illinois, USA.
B J SmithDepartment of Microbiology & Immunology, Chicago College of Osteopathic Medicine, Illinois Midwestern University, Downers Grove, Illinois, USA.
Y WangDepartment of Clinical and Experimental Sciences, Molecular Microbiology Group, Faculty of Medicine, University of Southampton, Southampton, United Kingdom.
B C JhamCollege of Dental Medicine, Illinois Midwestern University, Downers Grove, Illinois, USA.
K P O'HaganDepartment of Physiology, Chicago College of Osteopathic Medicine, Illinois Midwestern University, Downers Grove, Illinois, USA.
N R ThomsonPathogen Genomics, Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom.
A K MurthyDepartment of Pathology, Chicago College of Osteopathic Medicine, Illinois Midwestern University, Downers Grove, Illinois, USA.
R J SkiltonDepartment of Clinical and Experimental Sciences, Molecular Microbiology Group, Faculty of Medicine, University of Southampton, Southampton, United Kingdom.
P ChuDepartment of Microbiology & Immunology, Chicago College of Osteopathic Medicine, Illinois Midwestern University, Downers Grove, Illinois, USA.
I N ClarkeDepartment of Clinical and Experimental Sciences, Molecular Microbiology Group, Faculty of Medicine, University of Southampton, Southampton, United Kingdom.
Midwestern University · USUniversity of Southampton · GBWellcome Sanger Institute · GB

Funding

Wellcome TrustWellcome Trust 091296
6 · The paper itself

Abstract

The native plasmid of both Chlamydia muridarum and Chlamydia trachomatis has been shown to control virulence and infectivity in mice and in lower primates. We recently described the development of a plasmid-based genetic transformation protocol for Chlamydia trachomatis that for the first time provides a platform for the molecular dissection of the function of the chlamydial plasmid and its individual genes or coding sequences (CDS). In the present study, we transformed a plasmid-free lymphogranuloma venereum isolate of C. trachomatis, serovar L2, with either the original shuttle vector (pGFP::SW2) or a derivative of pGFP::SW2 carrying a deletion of the plasmid CDS5 gene (pCDS5KO). Female mice were inoculated with these strains either intravaginally or transcervically. We found that transformation of the plasmid-free isolate with the intact pGFP::SW2 vector significantly enhanced infectivity and induction of host inflammatory responses compared to the plasmid-free parental isolate. Transformation with pCDS5KO resulted in infection courses and inflammatory responses not significantly different from those observed in mice infected with the plasmid-free isolate. These results indicate a critical role of plasmid CDS5 in in vivo fitness and in induction of inflammatory responses. To our knowledge, these are the first in vivo observations ascribing infectivity and virulence to a specific plasmid gene.

Indexed as

PlasmidsAnimalsBacterial ProteinsChlamydia InfectionsChlamydia trachomatisDisease Models, AnimalFemaleGene DeletionLymphogranuloma VenereumMiceVirulence FactorsBacterial ProteinsVirulence Factors

Identifiers

PMID24866804
PMCPMC4136204
OpenAlexW2114198213

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.