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- W2018809407 abstract "Androgens are well known to enhance exercise-induced muscle hypertrophy; however, whether androgens also influence bone’s adaptive response to mechanical loading remains unclear. We studied the adaptive osteogenic response to unilateral in vivo mechanical loading of tibia in adult male mice in both a long- and a short-term experimental set-up. Mice were divided into four groups: sham operated, orchidectomized (ORX), T (ORX+T), or nonaromatizable dihydrotestosterone (ORX+DHT) replacement. Significant interactions between androgen status and osteogenic response to mechanical loading were observed. Cortical thickness increased by T (0.14 vs 0.11 mm sham, P < .05) and DHT (0.17 vs 0.11 mm sham, P < .05). However, T partially (+36%) and DHT completely (+10%) failed to exhibit the loading-related increase observed in sham (+107%) and ORX (+131%, all P < .05) mice. ORX decreased periosteal bone formation, which was restored to sham levels by T and DHT. However, both androgens completely suppressed the loading-related increase in periosteal bone formation. Short-term loading decreased the number of sclerostin-positive osteocytes in sham, whereas in control fibulas, ORX decreased and T increased the number of sclerostin-positive osteocytes. Loading no longer down-regulated sclerostin in the ORX or T groups. In conclusion, both T and DHT suppress the osteogenic response to mechanical loading." @default.
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- W2018809407 date "2015-04-01" @default.
- W2018809407 modified "2023-10-13" @default.
- W2018809407 title "Androgens Inhibit the Osteogenic Response to Mechanical Loading in Adult Male Mice" @default.
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- W2018809407 doi "https://doi.org/10.1210/en.2014-1673" @default.
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