Evidence map›Paper›PMID 24082080›Full record

ArticleInfection and immunity2013

Vaginolysin drives epithelial ultrastructural responses to Gardnerella vaginalis.

Tara M Randis, Joanne Zaklama, Timothy J LaRocca, Ferdinand C O Los, Emma L Lewis, Purnahamsi Desai, Ryan Rampersaud, Fábio E Amaral, Adam J Ratner

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
0.9field-weighted citation impact, top 24% 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

22 citing papers in PubMed, 38 citations in OpenAlex.

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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

9 authors at 1 institution in 1 country.

Tara M RandisDepartment of Pediatrics, Columbia University, New York, New York, USA.
Joanne Zaklama
Timothy J LaRocca
Ferdinand C O Los
Emma L Lewis
Purnahamsi Desai
Ryan Rampersaud
Fábio E Amaral
Adam J Ratner
Columbia University · US

Funding

Gardnerella vaginalis: toxin production and pathogenesisR01AI092743 · NIAID · NEW YORK UNIVERSITY SCHOOL OF MEDICINE · PI RATNER, ADAM JONATHAN · 2011 to 2015
$2.0M
DNase For Prevention Of Reproductive Tract Infections In PregnancyR33AI098654 · NIAID · NEW YORK UNIVERSITY SCHOOL OF MEDICINE · PI RATNER, ADAM JONATHAN · 2014 to 2016
$1.6M
K23 Bacterial Vaginosis: Vitamin D Links Mucosal Immunity and Patient RiskK23HD065844 · NICHD · NEW YORK UNIVERSITY SCHOOL OF MEDICINE · PI RANDIS, TARA M · 2011 to 2015
$684k
DNase For Prevention Of Reproductive Tract Infections In PregnancyR21AI098654 · NIAID · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI RATNER, ADAM JONATHAN · 2012 to 2013
$448k
NIAID NIH HHS R01 AI092743NIAID NIH HHS R01-AI092743NIAID NIH HHS R21 AI098654NIAID NIH HHS R21-AI098654NIAID NIH HHS R33 AI098654NICHD NIH HHS K23 HD065844NICHD NIH HHS K23-HD065844
6 · The paper itself

Abstract

Gardnerella vaginalis, the bacterial species most frequently isolated from women with bacterial vaginosis (BV), produces a cholesterol-dependent cytolysin (CDC), vaginolysin (VLY). At sublytic concentrations, CDCs may initiate complex signaling cascades crucial to target cell survival. Using live-cell imaging, we observed the rapid formation of large membrane blebs in human vaginal and cervical epithelial cells (VK2 and HeLa cells) exposed to recombinant VLY toxin and to cell-free supernatants from growing liquid cultures of G. vaginalis. Binding of VLY to its human-specific receptor (hCD59) is required for bleb formation, as antibody inhibition of either toxin or hCD59 abrogates this response, and transfection of nonhuman cells (CHO-K1) with hCD59 renders them susceptible to toxin-induced membrane blebbing. Disruption of the pore formation process (by exposure to pore-deficient toxoids or pretreatment of cells with methyl-β-cyclodextrin) or osmotic protection of target cells inhibits VLY-induced membrane blebbing. These results indicate that the formation of functional pores drives the observed ultrastructural rearrangements. Rapid bleb formation may represent a conserved response of epithelial cells to sublytic quantities of pore-forming toxins, and VLY-induced epithelial cell membrane blebbing in the vaginal mucosa may play a role in the pathogenesis of BV.

Indexed as

AnimalsBacterial ProteinsBacterial Toxinsbeta-CyclodextrinsCD59 AntigensCell Surface ExtensionsCervix UteriCHO CellsCricetulusEpithelial CellsFemaleGardnerella vaginalisGram-Positive Bacterial InfectionsHeLa CellsHumansSignal TransductionBacterial ProteinsBacterial Toxinsbeta-CyclodextrinsCD59 Antigensmethyl-beta-cyclodextrinvaginolysin, Gardnerella vaginalis

Identifiers

PMID24082080
PMCPMC3837968
OpenAlexW2169840088

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.