Evidence map›Paper›PMID 20837675›Full record

ArticleThe Journal of general physiology2010

IP(3)-dependent, post-tetanic calcium transients induced by electrostimulation of adult skeletal muscle fibers.

Mariana Casas, Reinaldo Figueroa, Gonzalo Jorquera, Matías Escobar, Jordi Molgó, Enrique Jaimovich

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of general physiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
1.6field-weighted citation impact, top 18% 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

37 citing papers in PubMed, 61 citations in OpenAlex.

  1. Trial
  2. Ets2 Is an Activity-Dependent Transcriptional Regulator of a Fast-Twitch Muscle Program.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2026
    Article
  3. Article
  4. Decreased Serum 5-HT: Clinical Correlates and Regulatory Role in NMJ of MG.Annals of clinical and translational neurology · 2026
    Article
  5. Article
  6. Silver electroceutical technology to treat sarcopenia.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
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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

6 authors at 2 institutions in 2 countries.

Mariana CasasCentro de Estudios Moleculares de la Célula, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile.
Reinaldo Figueroa
Gonzalo Jorquera
Matías Escobar
Jordi Molgó
Enrique Jaimovich
University of Chile · CLLaboratoire de Neurobiologie Cellulaire et Moléculaire · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Tetanic electrical stimulation induces two separate calcium signals in rat skeletal myotubes, a fast one, dependent on Cav 1.1 or dihydropyridine receptors (DHPRs) and ryanodine receptors and related to contraction, and a slow signal, dependent on DHPR and inositol trisphosphate receptors (IP(3)Rs) and related to transcriptional events. We searched for slow calcium signals in adult muscle fibers using isolated adult flexor digitorum brevis fibers from 5-7-wk-old mice, loaded with fluo-3. When stimulated with trains of 0.3-ms pulses at various frequencies, cells responded with a fast calcium signal associated with muscle contraction, followed by a slower signal similar to one previously described in cultured myotubes. Nifedipine inhibited the slow signal more effectively than the fast one, suggesting a role for DHPR in its onset. The IP(3)R inhibitors Xestospongin B or C (5 µM) also inhibited it. The amplitude of post-tetanic calcium transients depends on both tetanus frequency and duration, having a maximum at 10-20 Hz. At this stimulation frequency, an increase of the slow isoform of troponin I mRNA was detected, while the fast isoform of this gene was inhibited. All three IP(3)R isoforms were present in adult muscle. IP(3)R-1 was differentially expressed in different types of muscle fibers, being higher in a subset of fast-type fibers. Interestingly, isolated fibers from the slow soleus muscle did not reveal the slow calcium signal induced by electrical stimulus. These results support the idea that IP(3)R-dependent slow calcium signals may be characteristic of distinct types of muscle fibers and may participate in the activation of specific transcriptional programs of slow and fast phenotype.

Indexed as

AnimalsCalciumCalcium SignalingElectric StimulationInositol 1,4,5-Trisphosphate ReceptorsMacrocyclic CompoundsMiceMice, Inbred BALB CMuscle Fibers, SkeletalNifedipineOxazolesRNA, MessengerTetanyTroponin ICalciumInositol 1,4,5-Trisphosphate ReceptorsMacrocyclic CompoundsNifedipineOxazolesRNA, MessengerTroponin Ixestospongin B

Identifiers

PMID20837675
PMCPMC2947059
OpenAlexW2022893902

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-SA
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.