In vitro and in vivo effects of glucocorticoids on gene transfer to skeletal muscle

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Abstract

As a pharmacological approach to potentially improve gene transfer efficiency into skeletal muscle cells, glucocorticoids were shown here to allow efficient transfection of cultured and mouse human myoblasts, human pulmonary A549 cells, but not dog myoblasts, independently of the transfection protocol, the reporter gene and the transcription promoter employed. Transduction with adenovirus was also increased by dexamethasone. Pretreatment of cells 48 h prior to transfection was most effective and was shown to be concentration-dependent. This effect is mediated by binding to the glucocorticoid receptor, but not by glucocorticoid responsive elements present in the vectors. The acute dexamethasone effect could be due to increased plasmid entry into the cells as suggested by Southern blot, whereas the sustained increase of luciferase activity in dexamethasone-treated cultures may be related to intracellular mechanisms following cell entry. In mice in vivo, a similar increase of luciferase activity upon glucocorticoid treatment was found. Copyright (C) 1999 Federation of European Biochemical Societies.

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Braun, S., Jenny, C., Thioudellet, C., Perraud, F., Claudepierre, M. C., Längle-Rouault, F., … Pavirani, A. (1999). In vitro and in vivo effects of glucocorticoids on gene transfer to skeletal muscle. FEBS Letters, 454(3), 277–282. https://doi.org/10.1016/S0014-5793(99)00818-2

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