Please use this identifier to cite or link to this item:
Authors: Langendorf, Eva K.
Rommens, Pol M.
Drees, Philipp
Mattyasovszky, Stefan G.
Ritz, Ulrike
Title: Detecting the effects of the glucocorticoid dexamethasone on primary human skeletal muscle cells : differences to the murine cell line
Online publication date: 28-Aug-2020
Language: english
Abstract: Skeletal muscle atrophy is characterized by a decrease in muscle fiber size as a result of a decreased protein synthesis, which leads to degradation of contractile muscle fibers. It can occur after denervation and immobilization, and glucocorticoids (GCs) may also increase protein breakdown contributing to the loss of muscle mass and myofibrillar proteins. GCs are already used in vitro to induce atrophic conditions, but until now no studies with primary human skeletal muscle existed. Therefore, this study deals with the effects of the GC dexamethasone (dex) on primary human myoblasts and myotubes. After incubation with 1, 10, and 100 µM dex for 48 and 72 h, gene and protein expression analyses were performed by qPCR and Western blot. Foxo, MuRF-1, and MAFbx were significantly upregulated by dex, and there was increased gene expression of myogenic markers. However, prolonged incubation periods demonstrated no Myosin protein degradation, but an increase of MuRF-1 expression. In conclusion, applying dex did not only differently affect primary human myoblasts and myotubes, as differences were also observed when compared to murine cells. Based on our findings, studies using cell lines or animal cells should be interpreted with caution as signaling transduction and functional behavior might differ in diverse species. Keywords: atrophy; MuRF-1; myotubes; myoblasts; MAFbx; glucocorticoids; dexamethasone; Foxo; Myosin
DDC: 540 Chemie
540 Chemistry and allied sciences
570 Biowissenschaften
570 Life sciences
610 Medizin
610 Medical sciences
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 04 Medizin
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: CC-BY
Information on rights of use:
Journal: International journal of molecular sciences
Pages or article number: 2497
Publisher: MDPI
Publisher place: Basel
Issue date: 2020
ISSN: 1422-0067
Publisher's URL:
Appears in collections:JGU-Publikationen

Files in This Item:
File Description SizeFormat 
langendorf_eva_k.-detecting_the_-20200820172623600.pdf4.43 MBAdobe PDFView/Open