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AuthorAsfour, Hasan A.
AuthorShaqoura, Emad I.
AuthorSaid, Raed S.
AuthorMustafa, Ayman G.
AuthorEmerald, Bright Starling
AuthorAllouh, Mohammed Z.
Available date2023-08-29T10:21:47Z
Publication Date2021
Publication NameScientific Reports
ResourceScopus
ISSN20452322
URIhttp://dx.doi.org/10.1038/s41598-021-91854-4
URIhttp://hdl.handle.net/10576/46991
AbstractOxidative and glycolytic muscle fibers differ in their ultrastructure, metabolism, and responses to physiological stimuli and pathological insults. We examined whether these fibers respond differentially to exogenous anabolic androgenic steroids (AASs) by comparing morphological and histological changes between the oxidative anterior latissimus dorsi (ALD) and glycolytic pectoralis major (PM) fibers in adult avian muscles. Adult female White Leghorn chickens (Gallus gallus) were randomly divided into five groups: a vehicle control and four mesterolone treatment groups (4, 8, 12, and 16 mg/kg). Mesterolone was administered orally every three days for four weeks. Immunocytochemical techniques and morphometric analyses were employed to measure the changes in muscle weight, fiber size, satellite cell (SC) composition, and number of myonuclei. Mesterolone increased both body and muscle weights and induced hypertrophy in glycolytic PM fibers but not in oxidative ALD fibers. Mesterolone induced SC proliferation in both muscles; however, the myonuclear accretion was noticeable only in the PM muscle. In both muscles, the collective changes maintained a constant myonuclear domain size and the changes were dose independent. In conclusion, mesterolone induced distinct dose-independent effects in avian oxidative and glycolytic skeletal muscle fibers; these findings might be clinically valuable in the treatment of age-related sarcopenia.
SponsorThis study was funded by grants to MZA from the Deanship of Research at JUST (Grants # 20150145 and 20150290). Publication fees were provided by a grant to MZA from the College of Medicine and Health Sciences at United Arab Emirates University, Al Ain, UAE (Grant # G00003289, Fund # 31M441).
Languageen
PublisherNature Research
SubjectAnimal physiology
Muscle
Skeletal muscle
TitleDifferential response of oxidative and glycolytic skeletal muscle fibers to mesterolone
TypeArticle
Issue Number1
Volume Number11


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