Evidence map›Paper›PMID 15520904›Full record

ReviewThe Journal of membrane biology2004

Regulation of insulin secretion in islets of Langerhans by Ca(2+)channels.

David Mears

Abstract readReview
PubMed Publisher
In one paragraph

Review in The Journal of membrane biology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
48citing papers in PubMed, 2 pooled it
9.6field-weighted citation impact, top 2% 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, 2 syntheses or guidelines pooled it, 140 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. The dietary calcium-to-magnesium ratio and its association with glycemic control in type 2 diabetes: a cross-sectional study.Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine · 2026
    Article
  4. Review
  5. Article
  6. Article
  7. Article
  8. Review
  9. TRPC3 Regulates Islet Beta-Cell Insulin Secretion.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2023
    Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Nutrients · 2018
    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

1 author at 1 institution in 1 country.

David MearsDepartment of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, Maryland 20814, USA. dmears@usuhs.mil.
Uniformed Services University of the Health Sciences · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Insulin secretion from beta-cells of the pancreatic islets of Langerhans is triggered by Ca(2+) influx through voltage-dependent Ca(2+) channels. Electrophysiological and molecular studies indicate that beta-cells express several subtypes of these channels. This review discusses their roles in regulating insulin secretion, focusing on recent studies using beta-cells, exogenous expression systems, and Ca(2+) channel knockout mice. These investigations reveal that L-type Ca(2+) channels in the beta-cell physically interact with the secretory apparatus by binding to synaptic proteins on the plasma membrane and insulin granule. As a result, Ca(2+) influx through L-type channels efficiently and rapidly stimulates release of a pool of insulin granules in close contact with the channels. Thus, L-type Ca(2+) channel activity is preferentially coupled to exocytosis in the beta-cell, and plays a critical role in regulating the dynamics of insulin secretion. Non-L-type channels carry a significant portion of the total voltage-dependent Ca(2+) current in beta-cells and cell lines from some species, but nevertheless account for only a small fraction of insulin secretion. These channels may regulate exocytosis indirectly by affecting membrane potential or second messenger signaling pathways. Finally, voltage-independent Ca(2+) entry pathways and their potential roles in beta-cell function are discussed. The emerging picture is that Ca(2+) channels regulate insulin secretion at multiple sites in the stimulus-secretion coupling pathway, with the specific role of each channel determined by its biophysical and structural properties.

Indexed as

AnimalsCalcium Channels, L-TypeCalcium SignalingExocytosisHumansInsulinInsulin SecretionIon Channel GatingIslets of LangerhansMiceMice, KnockoutCalcium Channels, L-TypeInsulin

Identifiers

PMID15520904
OpenAlexW2071546758

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.