Evidence map›Paper›PMID 9529061›Full record

ArticleInfection and immunity1998

Defects in type III secretion correlate with internalization of Pseudomonas aeruginosa by epithelial cells.

A R Hauser, S Fleiszig, P J Kang, K Mostov, J N Engel

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers.

0numbers the graph read from it
0cells of the map it votes in
48citing papers in PubMed
3.0field-weighted citation impact, top 9% 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

48 citing papers in PubMed, 91 citations in OpenAlex.

  1. Article
  2. Defining the role ofJournal of bacteriology · 2026
    Article
  3. Evidence for intracellularJournal of bacteriology · 2024
    Review
  4. Frontiers in cellular and infection microbiology · 2017
    Review
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  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

5 authors at 2 institutions in 1 country.

A R HauserDepartment of Medicine, University of California, San Francisco, 94143, USA.
S Fleiszig
P J Kang
K Mostov
J N Engel
University of California, Berkeley · USUniversity of California, San Francisco · US

Funding

SIGNIFICANCE OF CORNEAL CELL INVASION BY BACTERIAR01EY011221 · NEI · UNIVERSITY OF CALIFORNIA BERKELEY · PI Suzanne MJ FLEISZIG · 1995 to 2026
$8.4M
HOST CELL DETERMINANTS IN PSEUDOMONAS PNEUMONIAR01HL055980 · NHLBI · UNIVERSITY OF CALIFORNIA SAN FRANCISCO · PI MOSTOV, KEITH E. · 1995 to 2003
$948k
NEI NIH HHS R01 EY011221NEI NIH HHS R01EY11221NHLBI NIH HHS R01 HL055980NHLBI NIH HHS R01 HL55980
6 · The paper itself

Abstract

Previous characterization of Pseudomonas aeruginosa clinical isolates has demonstrated an inverse correlation between cytotoxicity and internalization by epithelial cells. To further investigate this relationship, we tested PA103, a cytotoxic P. aeruginosa strain, and 33 isogenic noncytotoxic transposon mutants for internalization by Madin-Darby canine kidney cells. The majority of the mutants were not internalized, demonstrating that an inverse correlation between cytotoxicity and bacterial uptake by epithelial cells is not absolute. Six of the noncytotoxic mutants, however, demonstrated measurable levels of internalization by standard aminoglycoside exclusion assays even though internalization of wild-type strain PA103 was not detectable. All six had evidence of protein secretion defects involving two proteins, a 40-kDa protein and a 32-kDa protein. These proteins, designated PepB (for Pseudomonas exoprotein B) and PepD, respectively, each had characteristics of type III transported proteins. In addition, nucleotide sequencing studies demonstrated that PepB and PepD are homologs of YopB and YopD, respectively, type III secreted proteins of Yersinia spp. necessary for the translocation of effector molecules into the cytoplasmic compartment of eukaryotic cells. Thus, while many mutations in PA103 result in loss of cytotoxicity without an appreciable increase in internalization, defects in transport of type III secretion proteins PepB and PepD correlate with both loss of cytotoxicity and gain of internalization. These results are consistent with type III secretion of an inhibitor of internalization that requires PepB and PepD for translocation into the host cell.

Indexed as

Amino Acid SequenceAminopeptidasesAnimalsBacterial ProteinsCell LineCloning, MolecularDogsEpithelial CellsGlutamyl AminopeptidaseMolecular Sequence DataMutationPseudomonas aeruginosaAminopeptidasesBacterial ProteinsGlutamyl AminopeptidasePepB protein, Staphylococcus epidermidis

Identifiers

PMID9529061
PMCPMC108068
OpenAlexW2125832969

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.