Evidence map›Paper›PMID 8606080›Full record

ArticleInfection and immunity1996

Vesicles containing Chlamydia trachomatis serovar L2 remain above pH 6 within HEC-1B cells.

N Schramm, C R Bagnell, P B Wyrick

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 1996. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
4.1field-weighted citation impact, top 6% 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

24 citing papers in PubMed, 71 citations in OpenAlex.

  1. Repurposing epetraborole to combatAntimicrobial agents and chemotherapy · 2026
    Article
  2. Article
  3. Dynamic energy dependency ofThe Journal of biological chemistry · 2018
    Article
  4. TheFrontiers in cellular and infection microbiology · 2017
    Article
  5. Review
  6. Modulation of host signaling and cellular responses by Chlamydia.Cell communication and signaling : CCS · 2013
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Golgi-dependent transport of cholesterol to the Chlamydia trachomatis inclusion.Proceedings of the National Academy of Sciences of the United States of America · 2003
    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

3 authors at 1 institution in 1 country.

N SchrammDepartment of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill 27599-7290, USA.
C R Bagnell
P B Wyrick
University of North Carolina at Chapel Hill · US

Funding

VIRULENCE FACTORS OF CHLAMYDIAER01AI013446 · NIAID · UNIVERSITY OF NORTH CAROLINA CHAPEL HILL · PI WYRICK, PRISCILLA B. · 1985 to 2009
$3.6M
NIAID NIH HHS AI13446
6 · The paper itself

Abstract

Chlamydia trachomatis serovar L2 is an obligate intracellular bacterium which is internalized in target epithelial cells by endocytosis and resides within a membrane-bound vesicle. Over the next several hours following entry, individual serovar L2-containing vesicles fuse with one another to form a single membrane-bound vesicle (or inclusion) within which the microcolony develops. The experiments reported here directly examined the pH of vesicles containing chlamydiae. The pH was determined by measuring emission ratios of the fluorescent, pH-sensitive probe SNAFL (5-[and 6-]-carboxyseminaphthofluorescein-1, succinimidyl ester) conjugated to chlamydiae. The pH remained above 6.0 at 2, 4, and 12 h after infection, while the pH of vesicles contained heat-killed organisms fell 5.3. In the presence of amines, which raise the pH of acidic compartments, C. trachomatis inclusion formation was unaffected. Inactivation of Na+,K+ -ATPases, the ion pumps responsible for maintaining a pH above 6 within early endocytic vesicles, inhibited the growth of C. trachomatis within epithelial cells. Preventing vesicular acidification by inhibiting the vacuolar proton ATPase did not affect chlamydial growth. Thus, chlamydiae do not reside within highly acidic vesicles and avoid the pathway leading to lysosomes.

Indexed as

Cell LineChlamydia trachomatisChloroquineEndocytosisEndometriumFemaleHumansHydrogen-Ion ConcentrationSodium-Potassium-Exchanging ATPaseTemperatureVacuolesChloroquineSodium-Potassium-Exchanging ATPase

Identifiers

PMID8606080
PMCPMC173905
OpenAlexW2134593645

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.