Evidence map›Paper›PMID 20843861›Full record

ArticleDevelopment (Cambridge, England)2010

Retrograde influence of muscle fibers on their innervation revealed by a novel marker for slow motoneurons.

Joe V Chakkalakal, Hiroshi Nishimune, Jorge L Ruas, Bruce M Spiegelman, Joshua R Sanes

Open access · bronzeAbstract read
In one paragraph

Article in Development (Cambridge, England), 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 66 papers.

0numbers the graph read from it
0cells of the map it votes in
66citing papers in PubMed
2.9field-weighted citation impact, top 10% 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

66 citing papers in PubMed, 120 citations in OpenAlex.

  1. Article
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  3. Article
  4. Muscle fibre denervation in ageing.Clinical science (London, England : 1979) · 2026
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6 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

5 authors at 2 institutions in 1 country.

Joe V ChakkalakalDepartment of Molecular and Cellular Biology and Center for Brain Science, Harvard University, 52 Oxford Street, Cambridge, MA 02138, USA.
Hiroshi Nishimune
Jorge L Ruas
Bruce M Spiegelman
Joshua R Sanes
Harvard University · USDana-Farber Cancer Institute · US

Funding

PGC-1 AND NUCLEAR RECEPTORS IN ADAPTIVE THERMOGENESISR01DK054477 · NIDDK · DANA-FARBER CANCER INSTITUTE · PI SPIEGELMAN, BRUCE M. · 1998 to 2016
$7.0M
Extracellular Matrix and Neuromuscular DevelopmentR37NS019195 · NINDS · HARVARD UNIVERSITY · PI SANES, JOSHUA R · 2005 to 2011
$4.0M
EXTRACELLULAR MATRIX AND NEUROMUSCULAR DEVELOPMENTR01NS019195 · NINDS · WASHINGTON UNIVERSITY · PI SANES, JOSHUA R · 1985 to 2004
$2.0M
Maturation and Maintenance of the Postsynaptic ApparatusR01NS059853 · NINDS · HARVARD UNIVERSITY · PI SANES, JOSHUA R · 2008 to 2012
$1.5M
PGC-1 and Nuclear Receptors in Adaptive ThermogenesisR56DK054477 · NIDDK · DANA-FARBER CANCER INST · PI SPIEGELMAN, BRUCE M · 2006 to 2006
$395k
NIDDK NIH HHS DK54477NIDDK NIH HHS R01 DK054477NIDDK NIH HHS R56 DK054477NINDS NIH HHS NS19195NINDS NIH HHS NS59853NINDS NIH HHS R01 NS019195NINDS NIH HHS R01 NS059853NINDS NIH HHS R37 NS019195
6 · The paper itself

Abstract

Mammalian limb and trunk skeletal muscles are composed of muscle fibers that differ in contractile and molecular properties. They are commonly divided into four categories according to the myosin heavy chain that they express: I, IIA, IIX and IIB, ranging from slowest to fastest. Individual motor axons innervate tens of muscle fibers, nearly all of which are of the same type. The mechanisms accounting for this striking specificity, termed motor unit homogeneity, remain incompletely understood, in part because there have been no markers for motoneuron types. Here we show in mice that the synaptic vesicle protein SV2A is selectively localized in motor nerve terminals on slow (type I and small type IIA) muscle fibers; its close relatives, SV2B and SV2C, are present in all motor nerve terminals. SV2A is broadly expressed at birth; fast motoneurons downregulate its expression during the first postnatal week. An inducible transgene incorporating regulatory elements from the Sv2a gene permits selective labeling of slow motor units and reveals their composition. Overexpression of the transcriptional co-regulator PGC1α in muscle fibers, which converts them to a slow phenotype, leads to an increased frequency of SV2A-positive motor nerve terminals, indicating a fiber type-specific retrograde influence of muscle fibers on their innervation. This retrograde influence must be integrated with known anterograde influences in order to understand how motor units become homogeneous.

Indexed as

AnimalsGenetic MarkersImmunohistochemistryIn Situ HybridizationMembrane GlycoproteinsMiceMotor NeuronsMuscle Fibers, Slow-TwitchMuscle, SkeletalNerve Tissue ProteinsPeroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alphaPresynaptic TerminalsTrans-ActivatorsTranscription FactorsTransgenesGenetic MarkersMembrane GlycoproteinsNerve Tissue ProteinsPeroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alphaPpargc1a protein, mouseSv2a protein, mouseTrans-ActivatorsTranscription Factors

Identifiers

PMID20843861
PMCPMC2947760
OpenAlexW1964902107

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.