Evidence map›Paper›PMID 22203976›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2012

Type 1 ryanodine receptor knock-in mutation causing central core disease of skeletal muscle also displays a neuronal phenotype.

Valerie De Crescenzo, Kevin E Fogarty, Jason J Lefkowitz, Karl D Bellve, Elena Zvaritch, David H MacLennan, John V Walsh

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
1.3field-weighted citation impact, top 21% 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

22 citing papers in PubMed, 29 citations in OpenAlex.

  1. Frontiers in immunology · 2026
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  7. Sex-specific alterations in whole body energetics and voluntary activity in heterozygous R163C malignant hyperthermia-susceptible mice.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2020
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  8. Article
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  11. Aging Effects ofG3 (Bethesda, Md.) · 2017
    Article
  12. Article
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  14. Malignant hyperthermia: a review.Orphanet journal of rare diseases · 2015
    Review
  15. Article
  16. Review
  17. Article
  18. 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

7 authors at 2 institutions in 2 countries.

Valerie De CrescenzoDepartment of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA 01655, USA. valerie.decrescenzo@umassmed.edu
Kevin E Fogarty
Jason J Lefkowitz
Karl D Bellve
Elena Zvaritch
David H MacLennan
John V Walsh
University of Massachusetts Chan Medical School · USUniversity of Toronto · CA

Funding

Canadian Institutes of Health Research MOP-3399NHLBI NIH HHS HL21697
6 · The paper itself

Abstract

The type 1 ryanodine receptor (RyR1) is expressed widely in the brain, with high levels in the cerebellum, hippocampus, and hypothalamus. We have shown that L-type Ca(2+) channels in terminals of hypothalamic magnocellular neurons are coupled to RyRs, as they are in skeletal muscle, allowing voltage-induced Ca(2+) release (VICaR) from internal Ca(2+) stores without Ca(2+) influx. Here we demonstrate that RyR1 plays a role in VICaR in nerve terminals. Furthermore, in heterozygotes from the Ryr1(I4895T/WT) (IT/+) mouse line, carrying a knock-in mutation corresponding to one that causes a severe form of human central core disease, VICaR is absent, demonstrating that type 1 RyR mediates VICaR and that these mice have a neuronal phenotype. The absence of VICaR was shown in two ways: first, depolarization in the absence of Ca(2+) influx elicited Ca(2+)syntillas (scintilla, spark, in a nerve terminal, a SYNaptic structure) in WT, but not in mutant terminals; second, in the presence of extracellular Ca(2+), IT/+ terminals showed a twofold decrease in global Ca(2+) transients, with no change in plasmalemmal Ca(2+) current. From these studies we draw two conclusions: (i) RyR1 plays a role in VICaR in hypothalamic nerve terminals; and (ii) a neuronal alteration accompanies the myopathy in IT/+ mice, and, possibly in humans carrying the corresponding RyR1 mutation.

Indexed as

AnimalsCalciumCalcium Channels, L-TypeFluorescenceGene Knock-In TechniquesHypothalamusMiceMuscle, SkeletalMyopathy, Central CoreNeuronsPresynaptic TerminalsRyanodine Receptor Calcium Release ChannelCalciumCalcium Channels, L-TypeRyanodine Receptor Calcium Release Channel

Identifiers

PMID22203976
PMCPMC3258591
OpenAlexW2036677209

What Socratic 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 Socratic graph.