Evidence map›Paper›PMID 8814550›Full record

ArticleJournal of muscle research and cell motility1996

Spatial and temporal patterns of myosin heavy chain expression in developing rat extraocular muscle.

J K Brueckner, O Itkis, J D Porter

Abstract read
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In one paragraph

Article in Journal of muscle research and cell motility, 1996. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
3.8field-weighted citation impact, top 7% 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

24 citing papers in PubMed, 103 citations in OpenAlex.

  1. Article
  2. Review
  3. Obscurin Maintains Myofiber Identity in Extraocular Muscles.Investigative ophthalmology & visual science · 2024
    Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Myosin heavy chain composition of the human genioglossus muscle.Journal of speech, language, and hearing research : JSLHR · 2012
    Article
  12. Article
  13. Postnatal changes in the developing rat extraocular muscles.Investigative ophthalmology & visual science · 2011
    Article
  14. Article
  15. Article
  16. Article
  17. Functional diversity among a family of human skeletal muscle myosin motors.Proceedings of the National Academy of Sciences of the United States of America · 2010
    Article
  18. Histochemical and immunohistochemical profile of human and rat ocular medial rectus muscles.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2009
    Article
  19. An altered phenotype in a conditional knockout of Pitx2 in extraocular muscle.Investigative ophthalmology & visual science · 2009
    Article
  20. Article
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

3 authors at 1 institution in 1 country.

J K BruecknerDepartment of Anatomy, University of Kentucky Medical Center, Lexington 40536-0084, USA.
O Itkis
J D Porter
University of Kentucky · US

Funding

CELL AND MOLECULAR DIVERSITY OF EXTRAOCULAR MUSCLER01EY009834 · NEI · UNIVERSITY OF KENTUCKY · PI PORTER, JOHN D · 1993 to 2003
$906k
NEI NIH HHS EY09834
6 · The paper itself

Abstract

The present study describes transitions in myosin heavy chain expression in the extraocular muscles of rats between the ages of E17 and adult. The unique phenotype of the extraocular muscle is reflected in its fibre type composition, which is comprised by six distinct profiles, each defined by location (orbital versus global layer) and innervation pattern (single versus multiple terminals). During extraocular muscle myogenesis, developmental myosin heavy chains were expressed in both primary and secondary fibres from embryonic day E17 through the first postnatal week. At this time, the downregulation of developmental myosin heavy chain isoforms began in the global layer in a fibre type-specific manner, reaching completion only after the first postnatal month. By contrast, developmental isoforms were retained in the overwhelming majority of orbital layer fibres into adulthood and expressed differentially along the length of these fibres. Fast myosin heavy chain was detected pre- and postnatally in developing secondary fibres and in all of the singly innervated fibre types and one of the multiply innervated fibre types in the adult. As many as four fast isoforms were detected in maturing extraocular muscle, including the extraocular muscle-specific myosin heavy chain. Slow myosin heavy chain was expressed in primary fibres throughout development and in one of the multiply innervated fibre types in the adult. In contrast, the pure fast-twitch retractor bulbi initially expressed slow myosin heavy chain in fibres destined to switch to the fast myosin heavy chain developmental programme. Based upon spatial and temporal patterns of myosin heavy chain isoform transitions, we suggest that epigenetic influences, rather than purely myogenic stage-specific factors, are critical in determining the unique extraocular muscle phenotype.

Indexed as

Gene Expression Regulation, DevelopmentalAgingAnimalsBlotting, WesternEmbryonic and Fetal DevelopmentFemaleMicroscopy, ElectronMuscle DevelopmentMuscle Fibers, SkeletalMyosin Heavy ChainsNeuromuscular JunctionOculomotor MusclesOligonucleotide ProbesPhenotypeRatsRats, Sprague-DawleyMyosin Heavy ChainsOligonucleotide Probes

Identifiers

PMID8814550
OpenAlexW1977317296

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.