Cited by 59Mitochondrial Function and PathologyCellular transport and secretionCalcium signaling and nucleotide metabolism

Mitochondria Regulate the Ca2+–Exocytosis Relationship of Bovine Adrenal Chromaffin Cells

Open access
Giovannucci, David R., Hlubek, Michael D., Stuenkel, Edward L.·1999·The Journal of Neuroscience

Abstract

The present study expands the contemporary view of mitochondria as important participants in cellular Ca(2+) dynamics and provides evidence that mitochondria regulate the supply of release-competent secretory granules. Using pharmacological probes to inhibit mitochondrial Ca(2+) import, the ability of mitochondria to modulate secretory activity in single, patch-clamped bovine chromaffin cells was examined by simultaneously monitoring rapid changes in membrane surface area (DeltaC(m)) and cytosolic Ca(2+) levels ([Ca(2+)](c)). Repetitive step depolarizations or action potential waveforms were found to raise the [Ca(2+)](c) of chromaffin cells into the 1 microM to tens of micromolar range. Inhibiting mitochondria by treatment with carbonyl cyanide p-(trifuoro-methoxy)phenylhydrazone, antimycin-oligomycin, or ruthenium red revealed that mitochondria are a prominent component for the clearance of Ca(2+) that entered via voltage-activated Ca(2+) channels. Disruption of cellular Ca(2+) homeostasis by poisoning mitochondria enhanced the secretory responsiveness of chromaffin cells by increasing the amplitude of the transient rise and the time course of recovery to baseline of the evoked Delta[Ca(2+)](c). The enhancement of the secretory response was represented by significant deviation of the Ca(2+)-exocytosis relationship from a standard relationship that equates Ca(2+) influx and DeltaC(m). Thus, mitochondria would play a critical role in the control of secretory activity in chromaffin cells that undergo tonic or repetitive depolarizing activity, likely by limiting the Ca(2+)-dependent activation of specific proteins that recruit or prime secretory granules for exocytosis.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1523/jneurosci.19-21-09261.1999

Cites

84 of 84 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Use of CCCP or FCCP decreases the Ca2+ buffering capacity of mitochondria and increases global exocytosis in bovine and rat chromaffin cells but not in the same cell type in mice.

    “In accordance with this theory, use of CCCP or FCCP decreases the Ca2+ buffering capacity of mitochondria and increases global exocytosis in bovine [164,165] and rat chromaffin cells [166] but not in the same cell type in mice [167], suggesting species differences.”
  • By decreasing the Ca2+ buffering capacity of mitochondria, CCCP or FCCP increases global exocytosis in chromaffin cells.

    “By decreasing the Ca2+ buffering capacity of mitochondria, CCCP or FCCP increases global exocytosis in chromaffin cells [164,165,166].”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Giovannucci, D. R., Hlubek, M. D., & Stuenkel, E. L.
Affiliations
University of Michigan (US)
Venue
The Journal of Neuroscience
Published
1999-11-01
Volume
19
Issue
21
Pages
9261-9270
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1675974676
Cited by
59
References
84
Citations by year
2024: 1 · 2023: 1 · 2022: 1 · 2021: 1 · 2019: 1 · 2018: 1 · 2015: 1 · 2014: 2 · 2013: 2 · 2012: 3
FWCI
1.49
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01ns036227-05)
  • National Institute of Neurological Disorders and Stroke (NS36227)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
mitochondria, calcium homeostasis, exocytosis, chromaffin cells, adrenal medulla, secretory granules, mitochondrial calcium uptake, voltage-gated calcium channels, intracellular calcium, membrane surface area, ruthenium red
MeSH terms
Action Potentials, Adrenal Cortex, Animals, Cadmium, Calcium, Carbonyl Cyanide p-Trifluoromethoxyphenylhydrazone, Cattle, Cells, Cultured, Dimethylphenylpiperazinium Iodide, Egtazic Acid, Exocytosis, Kinetics, Membrane Potentials, Mitochondria, Patch-Clamp Techniques, Chromaffin Cells

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review