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In order to investigate the effects of glucocorticoid excess in rodent models, reliable methods of continuous glucocorticoid delivery are essential. The current study compares two methods of corticosterone (CS) delivery in regards to their ability to induce typical adverse outcomes such as fat accrual, insulin resistance, sarcopenia and bone loss.Eight-week-old mice received CS for 4weeks either via...
To identify small molecules that suppress the apoptosis of mesenchymal stem cells (MSCs) is promising for stem cell therapy. We recently showed that bone morphogenetic protein 4 (BMP4) signalling involves the effect of cholesterol myristate on the proliferation of MSCs. The present study evaluated the effects of cholesterol myristate on the apoptosis of MSCs and the inhibitor of differentiation (Id1),...
Glucocorticoids at pharmacological doses have been shown to interfere with fracture repair. The role of endogenous glucocorticoids in fracture healing is not well understood. We examined whether endogenous glucocorticoids affect bone healing in an in vivo model of cortical defect repair.Experiments were performed using a well characterised mouse model in which intracellular glucocorticoid signalling...
We recently identified that cholesterol myristate in traditional Chinese medicine (TCM) is the active compound that increases proliferation of mesenchymal stem cell (MSCs). The present study is further to determine what signal pathway involves in effect of cholesterol myristate. Reverse transcription-PCR, Western blot and ELISA analysis show that cholesterol myristate increases the release of bone...
Chronic administration of exogenous glucocorticoids is often required in experimental research. We compared the efficacy and reliability of three different methods of continuous glucocorticoid administration in mice.Male CD1 Swiss White mice aged 7–9 weeks received corticosterone (CS) or carrier by either subcutaneous (s.c.) injection (n=15), s.c. implantation of micro-osmotic pumps (n=20) or s.c...
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