Evidence map›Paper›PMID 25885273›Full record

ArticlePloS one2015

Alkalinity of neutrophil phagocytic vacuoles is modulated by HVCN1 and has consequences for myeloperoxidase activity.

Adam P Levine, Michael R Duchen, Simon de Villiers, Peter R Rich, Anthony W Segal

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
4.6field-weighted citation impact, top 5% 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

45 citing papers in PubMed, 79 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Trial
  4. Review
  5. Hv1 channel in immune cells and pharmacology.Pharmacological research · 2025
    Review
  6. Article
  7. Article
  8. The vacuolar anti-Frontiers in immunology · 2024
    Article
  9. Review
  10. Article
  11. Review
  12. Halogenation Activity of Mammalian Heme Peroxidases.Antioxidants (Basel, Switzerland) · 2022
    Review
  13. Article
  14. Article
  15. Heme Peroxidases at Unperturbed and Inflamed Mucous Surfaces.Antioxidants (Basel, Switzerland) · 2021
    Review
  16. Article
  17. Review
  18. Article
  19. Review
  20. 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

5 authors at 1 institution in 1 country.

Adam P LevineDivision of Medicine, University College London, London, United Kingdom.
Michael R DuchenDepartment of Cell and Developmental Biology, University College London, London, United Kingdom.
Simon de VilliersGlynn Laboratory of Bioenergetics, Department of Biology, University College London, London, United Kingdom.
Peter R RichGlynn Laboratory of Bioenergetics, Department of Biology, University College London, London, United Kingdom.
Anthony W SegalDivision of Medicine, University College London, London, United Kingdom.
University College London · GB

Funding

Biotechnology and Biological Sciences Research CouncilWellcome TrustWellcome Trust WT081695
6 · The paper itself

Abstract

The NADPH oxidase of neutrophils, essential for innate immunity, passes electrons across the phagocytic membrane to form superoxide in the phagocytic vacuole. Activity of the oxidase requires that charge movements across the vacuolar membrane are balanced. Using the pH indicator SNARF, we measured changes in pH in the phagocytic vacuole and cytosol of neutrophils. In human cells, the vacuolar pH rose to ~9, and the cytosol acidified slightly. By contrast, in Hvcn1 knock out mouse neutrophils, the vacuolar pH rose above 11, vacuoles swelled, and the cytosol acidified excessively, demonstrating that ordinarily this channel plays an important role in charge compensation. Proton extrusion was not diminished in Hvcn1-/- mouse neutrophils arguing against its role in maintaining pH homeostasis across the plasma membrane. Conditions in the vacuole are optimal for bacterial killing by the neutral proteases, cathepsin G and elastase, and not by myeloperoxidase, activity of which was unphysiologically low at alkaline pH.

Indexed as

PhagocytosisAnimalsCathepsin GCells, CulturedCytoplasmHumansHydrogen-Ion ConcentrationIon ChannelsMice, Inbred C57BLMice, KnockoutNeutrophilsPancreatic ElastasePeroxidaseRespiratory BurstVacuolesCathepsin GCtsg protein, mouseHv1 proton channel, mouseIon ChannelsPancreatic ElastasePeroxidase

Identifiers

PMID25885273
PMCPMC4401748
OpenAlexW2025993106

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.