Abstract
MyoD is a myogenic regulatory factor with a critical role in skeletal muscle development and regeneration. As muscle regeneration comes with an inflammatory process, it has been proposed that the inflammatory cells can play an important role in the induction of muscle fibres regeneration. The aim of the present work was to verify if a cyclooxygenase inhibitory drug (ketoprofen) would alter the normal expression of MyoD in a regenerating rat soleus muscle after an over-load lesion. Using immunohistochemical techniques, the numbers of m-cadherin-positive cells, a selective marker of satellite cells, and MyoD-positive cells were evaluated in functionally overloaded rat soleus muscles 4 days after a gastrocnemius tendon cut. The same study was conducted either with four rats injected with ketoprofen (100 mg/kg b.w./day) or with four rats injected with saline solution. The data obtained showed a very large decrease in the number of MyoD positive/m-cadherin positive cells in the ketoprofen injected group compared to the control group. Although further studies are needed to elucidate the sequence of biochemical events that induce a reduction of MyoD expression due to ketoprofen, the results demonstrate that prostaglandin synthesis is required for the induction of MyoD expression and that ketoprofen can affect this expression, with possible adverse effects on muscle regeneration.
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Monda, M., Vicidomini, C., Viggiano, A. et al. Inhibition of prostaglandin synthesis reduces the induction of MyoD expression in rat soleus muscle. J Muscle Res Cell Motil 30, 139–144 (2009). https://doi.org/10.1007/s10974-009-9182-0
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DOI: https://doi.org/10.1007/s10974-009-9182-0