Effects of sclerostin injection on soleus and extensor digitorum longus muscle tissue in male mice.
| Autor: | Stoikos J; Centre for Bone and Muscle Health, Department of Kinesiology, Brock University, ON, Canada., Kurgan N; Centre for Bone and Muscle Health, Department of Kinesiology, Brock University, ON, Canada., Kottaras S; Centre for Bone and Muscle Health, Department of Kinesiology, Brock University, ON, Canada., Fajardo VA; Centre for Bone and Muscle Health, Department of Kinesiology, Brock University, ON, Canada., Gittings W; Centre for Bone and Muscle Health, Department of Kinesiology, Brock University, ON, Canada., Klentrou P; Centre for Bone and Muscle Health, Department of Kinesiology, Brock University, ON, Canada. |
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| Jazyk: | angličtina |
| Zdroj: | Canadian journal of physiology and pharmacology [Can J Physiol Pharmacol] 2024 Apr 01; Vol. 102 (4), pp. 293-304. Date of Electronic Publication: 2023 Nov 17. |
| DOI: | 10.1139/cjpp-2023-0268 |
| Abstrakt: | Sclerostin, a potent inhibitor of the Wnt signaling pathway, plays a critical role in bone homeostasis. Evidence suggests that sclerostin may also be involved in crosstalk between other tissues, including muscle. This pilot study attempted to examine the effects of sclerostin on soleus and extensor digitorum longus (EDL) muscle tissue from male mice that were given continuous recombinant sclerostin injections for 4 weeks. A total of 48 10-week-old male C57BL/6J mice were assigned to be sedentary or perform 1 h treadmill running per day for 4 weeks and administered subcutaneous injections of either saline or recombinant sclerostin 5 days/week. Sclerostin injection led to a reduction in the soleus myosin heavy chain (MHC) I, MHC I/IIA, MHC IIA/X, and MHC IIB cross-sectional area ( p < 0.05) with no exercise effects on these reductions. In contrast, there were no effects of sclerostin injections or exercise on the fast-twitch EDL muscle in terms of size, MHC protein, or markers of Wnt signaling. These findings provide preliminary evidence of sclerostin's endocrine role in muscle via decreases in myofiber cross-sectional area, which seems to be independent of fiber type but muscle type-specific. More studies, however, are needed to confirm these preliminary results. Competing Interests: The authors declare no conflict of interest. |
| Databáze: | MEDLINE |
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