Evidence map›Paper›PMID 33074302›Full record

ArticleThe Journal of general physiology2020

A novel voltage-clamp/dye uptake assay reveals saturable transport of molecules through CALHM1 and connexin channels.

Pablo S Gaete, Mauricio A Lillo, William López, Yu Liu, Wenjuan Jiang, Yun Luo, Andrew L Harris, Jorge E Contreras

Abstract read
In one paragraph

Article in The Journal of general physiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
–field-weighted citation impact
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

11 citing papers in PubMed.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Model-based evaluation of connexin hemichannel permeability.Computational and structural biotechnology journal · 2025
    Article
  6. Large-pore connexin hemichannels function like molecule transporters independent of ion conduction.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  7. Article
  8. TwomBio · 2024
    Article
  9. GRA47 and GRA72 arebioRxiv : the preprint server for biology · 2023
    Article
  10. Review
  11. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors.

Pablo S GaeteDepartment of Pharmacology, Physiology, and Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ.
Mauricio A LilloDepartment of Pharmacology, Physiology, and Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ.
William LópezDepartment of Pharmacology, Physiology, and Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ.
Yu LiuDepartment of Pharmacology, Physiology, and Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ.
Wenjuan JiangDepartment of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, Pomona, CA.
Yun LuoDepartment of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, Pomona, CA.
Andrew L HarrisDepartment of Pharmacology, Physiology, and Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ.
Jorge E ContrerasDepartment of Pharmacology, Physiology, and Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ.

Funding

Gating and Regulation of Connexin HemichannelsR01GM099490 · NIGMS · UNIV OF MED/DENT OF NJ-NJ MEDICAL SCHOOL · PI CONTRERAS, JORGE ENRIQUE · 2011 to 2025
$4.9M
PHARMACOLOGICAL MODULATION OF PIEZO1 CHANNELSR01GM130834 · NIGMS · WESTERN UNIVERSITY OF HEALTH SCIENCES · PI Yun Lyna LUO, Jerome Lacroix · 2019 to 2026
$2.8M
Regulation of Cx26 and Cx32 Channels by Cytosolic Interdomain InteractionsR01GM101950 · NIGMS · UNIV OF MED/DENT OF NJ-NJ MEDICAL SCHOOL · PI CONTRERAS, JORGE ENRIQUE, HARRIS, ANDREW L · 2013 to 2016
$1.4M
NIGMS NIH HHS R01 GM099490NIGMS NIH HHS R01 GM101950NIGMS NIH HHS R01 GM130834
6 · The paper itself

Abstract

Large-pore channels permeable to small molecules such as ATP, in addition to atomic ions, are emerging as important regulators in health and disease. Nonetheless, their mechanisms of molecular permeation and selectivity remain mostly unexplored. Combining fluorescence microscopy and electrophysiology, we developed a novel technique that allows kinetic analysis of molecular permeation through connexin and CALHM1 channels in Xenopus oocytes rendered translucent. Using this methodology, we found that (1) molecular flux through these channels saturates at low micromolar concentrations, (2) kinetic parameters of molecular transport are sensitive to modulators of channel gating, (3) molecular transport and ionic currents can be differentially affected by mutation and gating, and (4) N-terminal regions of these channels control transport kinetics and permselectivity. Our methodology allows analysis of how human disease-causing mutations affect kinetic properties and permselectivity of molecular signaling and enables the study of molecular mechanisms, including selectivity and saturability, of molecular transport in other large-pore channels.

Indexed as

Calcium ChannelsConnexinsOocytesAnimalsBiological TransportFemaleIon TransportKineticsMembrane GlycoproteinsXenopus laevisCalcium ChannelsConnexinsMembrane Glycoproteins

Identifiers

PMID33074302
PMCPMC7579738

What OpenQuestion holds

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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.