首页> 外文期刊>Neuropathology: official journal of the Japanese Society of Neuropathology >The expression pattern of PKCtheta in satellite cells of normal and regenerating muscle in the rat.
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The expression pattern of PKCtheta in satellite cells of normal and regenerating muscle in the rat.

机译:PKCtheta在大鼠正常和再生肌肉的卫星细胞中的表达模式。

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摘要

Protein kinase C (PKC) is a key enzyme in regulating a variety of cellular functions. PKCtheta is the most abundant PKC isoform expressed in skeletal muscle. However, the functional role of PKCtheta linked to muscle regeneration has not yet been identified. Using reverse transcription (RT)-PCR and immunofluorescence analysis, we investigated the expression patterns of PKCtheta in normal and regenerating tibialis anterior (TA) muscles in the rat. The amount of PKCtheta mRNA in the muscle increased from the 4th to 6th post-surgical day. Immunofluorescence revealed PKCtheta protein in quiescent satellite cells identified by c-Met. PKCtheta immunoreactivity was not observed in many proliferating satellite cells by labeling with BrdU in the regenerating muscle. At 4, 6 and 10 days postsurgery, PKCtheta immunoreactivity was observed in half the differentiating satellite cells labeling with myogenin. After 4 and 6 days, the localization of PKCtheta coincided with those of Pax7 and TGF-beta. Thus, PKCtheta may play an important role in inhibiting differentiation and maintaining the quiescent satellite cells in muscle regeneration.
机译:蛋白激酶C(PKC)是调节多种细胞功能的关键酶。 PKCtheta是骨骼肌中表达最丰富的PKC亚型。但是,尚未确定与肌肉再生有关的PKCtheta的功能作用。使用逆转录(RT)-PCR和免疫荧光分析,我们调查了正常和再生胫前肌(TA)大鼠的PKCtheta的表达模式。肌肉中PKCtheta mRNA的量从术后第4天增加到第6天。免疫荧光揭示了c-Met鉴定的静止卫星细胞中的PKCtheta蛋白。通过在再生肌肉中标记BrdU,在许多增殖的卫星细胞中未观察到PKCtheta免疫反应性。术后第4、6和10天,在用肌生成素标记的一半分化卫星细胞中观察到PKCtheta免疫反应性。 4天和6天后,PKCtheta的定位与Pax7和TGF-beta的定位一致。因此,PKCtheta可能在肌肉分化中抑制分化和维持静止卫星细胞中起重要作用。

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