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Erschienen in: European Journal of Applied Physiology 4/2014

01.04.2014 | Original Article

Androgenic and estrogenic regulation of Atrogin-1, MuRF1 and myostatin expression in different muscle types of male mice

verfasst von: H. De Naeyer, S. Lamon, A. P. Russell, I. Everaert, A. De Spaey, B. Vanheel, Y. Taes, W. Derave

Erschienen in: European Journal of Applied Physiology | Ausgabe 4/2014

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Abstract

Purpose

The molecular factors targeted by androgens and estrogens on muscle mass are not fully understood. The current study aimed to explore gene and protein expression of Atrogin-1, MuRF1, and myostatin in an androgen deprivation-induced muscle atrophy model.

Methods

We examined the effects of Orx either with or without testosterone (T) or estradiol (E2) administration on Atrogin-1 gene expression, and MuRF1 and myostatin gene and protein expression. Measurements were made in soleus (SOL), extensor digitorum longus (EDL) and levator ani/bulbocavernosus (LA/BC) of male C57BL/6 mice.

Results

Thirty days of Orx resulted in a reduction in weight gain and muscle mass. These effects were prevented by T. In LA/BC, Atrogin-1 and MuRF1 mRNA was increased throughout 30 days of Orx, which was fully reversed by T and partially by E2 administration. In EDL and SOL, a less pronounced upregulation of both genes was only detectable at the early stages of Orx. Myostatin mRNA levels were downregulated in LA/BC and upregulated in EDL following Orx. T, but not E2, reversed these effects. No changes in protein levels of MuRF1 and myostatin were found in EDL at any time point following Orx.

Conclusions

The atrophy in SOL and EDL in response to androgen deprivation, and its restoration by T, is accompanied by only minimal changes in atrogenes and myostatin gene expression. The marked differences in muscle atrophy and atrogene and myostatin mRNA between LA/BC and the locomotor muscles suggest that the murine LA/BC is not an optimal model to study Orx-induced muscle atrophy.
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Metadaten
Titel
Androgenic and estrogenic regulation of Atrogin-1, MuRF1 and myostatin expression in different muscle types of male mice
verfasst von
H. De Naeyer
S. Lamon
A. P. Russell
I. Everaert
A. De Spaey
B. Vanheel
Y. Taes
W. Derave
Publikationsdatum
01.04.2014
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Applied Physiology / Ausgabe 4/2014
Print ISSN: 1439-6319
Elektronische ISSN: 1439-6327
DOI
https://doi.org/10.1007/s00421-013-2800-y

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Substanzkonsum und Nutzung von sozialen Medien, Computerspielen und Glücksspielen unter Auszubildenden an beruflichen Schulen

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Die Begrenzung von Schäden durch Substanzkonsum und andere abhängige Verhaltensweisen von Jugendlichen und jungen Erwachsenen ist ein wichtiges Anliegen der öffentlichen Gesundheit. Der Übergang von der Adoleszenz zum jungen Erwachsenenalter ist …

Berufsbelastung und Stressbewältigung von weiblichen und männlichen Auszubildenden

Leitthema

In der Öffentlichkeit wird die berufliche Ausbildung oftmals unter ökonomischen Gesichtspunkten diskutiert: Mit den geburtenstarken Jahrgängen gehen erfahrene Fachkräfte in Rente und von nachfolgenden Generationen rücken zu wenige Arbeitskräfte …

Rauschtrinken in der frühen Adoleszenz

COVID-19 Leitthema

Alkohol ist in Deutschland die mit Abstand am häufigsten konsumierte psychoaktive Substanz. Mehr als 2 Drittel aller Erwachsenen im Alter von 18 bis 64 Jahren (70,5 %) hat 2021 in den letzten 30 Tagen Alkohol konsumiert [ 1 ]. Von diesen …