Change search
ReferencesLink to record
Permanent link

Direct link
Human single masseter muscle fibers contain unique combinations of myosin and myosin binding protein C isoforms
Pennsylvania State University.
Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy.
Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy.
2002 (English)In: Journal of Muscle Research and Cell Motility, ISSN 0142-4319, E-ISSN 1573-2657, Vol. 23, no 4, 317-326 p.Article in journal (Refereed) Published
Abstract [en]

Striated craniofacial and limb muscles differ in their embryological origin, regulatory program during myogenesis, and innervation. In an attempt to explore the effects of these differences on the striated muscle phenotype in humans, the expression of myosin and myosin-associated thick filament proteins were studied at the single fiber level both in the human jaw-closing masseter muscle and in two limb muscles (biceps brachii and quadriceps femoris muscles). In the masseter, unique combinations of myosin heavy chain (MyHC) and myosin binding protein C (MyBP-C) isoforms were observed at the single fiber level. Compared to the limb muscles, the MyHC isoform expression was more complex in the masseter while the opposite was observed for MyBP-C. In limb muscles, a coordinated expression of three MyHC and three MyBP-C isoforms were observed, i.e., single fibers contained one or two MyHC isoforms, and up to three MyBP-C isoforms. Also, the relative content of the different MyBP-C isoforms correlated with the MyHC isoform expression. In the masseter, on the other hand, up to five different MyHC isoforms could be observed in the same fiber, but only one MyBP-C isoform was identified irrespective MyHC isoform expression. This MyBP-C isoform had a migration rate similar to the slow MyBP-C isoform in limb muscle fibers. In conclusion, a unique myofibrillar protein isoform expression was observed in the human masseter muscle fibers, suggesting significant differences in structural and functional properties between muscle fibers from human masseter and limb muscles.

Place, publisher, year, edition, pages
2002. Vol. 23, no 4, 317-326 p.
Keyword [en]
Adolescent, Adult, Capillaries/pathology, Cerebral Palsy/metabolism/pathology, Female, Humans, Immunohistochemistry, Male, Mitochondria/metabolism, Muscle Fibers; Fast-Twitch/metabolism/pathology, Muscle Spasticity/*metabolism/pathology, Muscle; Skeletal/*blood supply/*metabolism/pathology, Myosin Heavy Chains/*metabolism, NAD/metabolism, Paresis/*metabolism/pathology, Stroke/metabolism/pathology
National Category
Cell and Molecular Biology
URN: urn:nbn:se:umu:diva-82659DOI: 10.1023/A:1022061706126ISI: 000180454400008PubMedID: 12630706OAI: diva2:662098
Available from: 2013-11-06 Created: 2013-11-06 Last updated: 2014-04-16Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Stål, PerThornell, Lars-Eric
By organisation
In the same journal
Journal of Muscle Research and Cell Motility
Cell and Molecular Biology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 20 hits
ReferencesLink to record
Permanent link

Direct link