Evidence map›Paper›PMID 10096921›Full record

ArticleBiophysical journal1999

Tracking single secretory granules in live chromaffin cells by evanescent-field fluorescence microscopy.

J A Steyer, W Almers

Open access · bronzeAbstract read
In one paragraph

Article in Biophysical journal, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 74 papers.

0numbers the graph read from it
0cells of the map it votes in
74citing papers in PubMed
4.7field-weighted citation impact, top 4% 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

74 citing papers in PubMed, 207 citations in OpenAlex.

  1. Article
  2. Maximal Fusion Capacity and Efficient Replenishment of the Dense Core Vesicle Pool in Hippocampal Neurons.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2023
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  7. Review
  8. Article
  9. v-SNARE function in chromaffin cells.Pflugers Archiv : European journal of physiology · 2018
    Review
  10. Article
  11. Article
  12. Control of autophagosome axonal retrograde flux by presynaptic activity unveiled using botulinum neurotoxin type a.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2015
    Article
  13. Article
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  19. Secretagogue stimulation of neurosecretory cells elicits filopodial extensions uncovering new functional release sites.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2013
    Article
  20. Review

14 more citing papers are in PubMed but not listed here.

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

2 authors at 1 institution in 1 country.

J A SteyerMax-Planck-Institut für Medizinische Forschung, 69120 Heidelberg, Germany.
W Almers
Max Planck Society · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We have observed secretory granules beneath the plasma membrane of chromaffin cells. Using evanescent-field excitation by epiillumination, we have illuminated a thin layer of cytosol where cells adhere to glass coverslips. Up to 600 frames could be recorded at diffraction-limited resolution without appreciable photodynamic damage. We localized single granules with an uncertainty of approximately 30 nm and tracked their motion in three dimensions. Granules in resting cells wander randomly as if imprisoned in a cage that leaves approximately 70 nm space around a granule. The "cage" itself moves only slowly (D = 2 x 10(-12) cm2/s). Rarely do granules arrive at or depart from the plasma membrane of resting cells. Stimulation increases lateral motion only slightly. After the plasma membrane has been depleted of granules by exocytosis, fresh granules can be seen to approach it at an angle. The method will be useful for exploring the molecular steps preceding exocytosis at the level of single granules.

Indexed as

AnimalsBiophysical PhenomenaBiophysicsCattleCell DegranulationCell MembraneChromaffin CellsCytoplasmic GranulesDiffusionExocytosisIn Vitro TechniquesMicroscopy, FluorescenceMovementPotassiumPotassium

Identifiers

PMID10096921
PMCPMC1300199
OpenAlexW2032074620

What OpenQuestion holds

Texttitle and abstract
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.