Search: onr:"swepub:oai:DiVA.org:umu-83538" >
Concomitant increas...
-
Kadi, FUmeå universitet,Anatomi
(author)
Concomitant increases in myonuclear and satellite cell content in female trapezius muscle following strength training.
- Article/chapterEnglish2000
Publisher, publication year, extent ...
Numbers
-
LIBRIS-ID:oai:DiVA.org:umu-83538
-
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-83538URI
Supplementary language notes
-
Language:English
-
Summary in:English
Part of subdatabase
Classification
-
Subject category:ref swepub-contenttype
-
Subject category:art swepub-publicationtype
Notes
-
A skeletal muscle fibre maintains its cytoplasmic volume by means of hundreds of myonuclei distributed along its entire length. Therefore it is hypothesised that changes in fibre size would involve modifications in myonuclear number. In this study, we have examined whether 10 weeks of strength training can induce changes in the number of myonuclei and satellite cells in female trapezius muscles. Biopsies were taken pre- and posttraining from the upper part of the descending trapezius muscle of nine subjects. Muscle samples were analysed for fibre area and myonuclear and satellite cell number using immunohistochemistry. There was a 36% increase in the cross-sectional area of muscle fibres. The hypertrophy of muscle fibres was accompanied by an approximately 70% increase in myonuclear number and a 46% increase in the number of satellite cells. Myonuclei number was positively correlated to satellite cell number indicating that a muscle with an increased concentration of myonuclei will contain a correspondingly higher number of satellite cells. The acquisition of additional myonuclei appears to be required to support the enlargement of multinucleated muscle cells following 10 weeks of strength training. Increased satellite cell content suggests that mitotic divisions of satellite cells produced daughter cells that became satellite cells.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Thornell, Lars-EricUmeå universitet,Anatomi(Swepub:umu)lath0002
(author)
-
Umeå universitetAnatomi
(creator_code:org_t)
Related titles
-
In:Histochemistry and Cell Biology113:2, s. 99-1030948-61431432-119X
Internet link
Find in a library
To the university's database