运动对两种外周动脉疾病小鼠模型骨骼肌中mRNA表达的急性和慢性影响。
Acute and chronic effects of exercise on mRNA expression in the skeletal muscle of two mouse models of peripheral artery disease.
作者信息
Nagase Hiroki, Yao Shuhei, Ikeda Shota
机构信息
Cardiovascular and Metabolic Drug Discovery Unit, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, Fujisawa, Japan.
Integrated Technology Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, Fujisawa, Japan.
出版信息
PLoS One. 2017 Aug 3;12(8):e0182456. doi: 10.1371/journal.pone.0182456. eCollection 2017.
Endurance exercise improves walking performance in patients with peripheral artery disease (PAD), which is characterized by skeletal muscle dysfunction caused by lower extremity ischemia. Although transcriptional analyses of exercise-induced changes in normal animals and healthy volunteers have been reported, no detailed study has explored exercise-induced alterations in gene expression in PAD animal models. Here, we determined the acute and chronic effects of exercise on mRNA expression in the skeletal muscles of two mouse models of PAD. Three particular gene categories were investigated: known exercise-responsive genes (Pgc1a, Il6, Nr4a1, Nr4a2, and Nr4a3); myogenic and muscle regeneration-related genes (Myf5, Myogenin, Myomaker, and Myh3); and Gpr56 and its ligand Col3a1. PAD was induced by bilateral femoral artery ligation in normal C57BL/6 and diabetic KK-Ay mice. From 1 week after surgery, repetitive twice-weekly 30-min treadmill endurance exercise sessions were applied. Altered mRNA expression in the soleus muscles was measured in both the acute and chronic phases. In the acute phase, transcript levels of exercise-inducible genes showed significant increases in both C57BL/6 and diabetic KK-Ay PAD mice; levels of regeneration-related genes showed little alteration, and those of Gpr56 increased immediately and significantly after exercise in both models. In the chronic phase, transcript levels of Pgc1a, Myf5, Myogenin, Myomaker, Myh3, Gpr56, and Col3a1 were upregulated significantly in sedentary C57BL/6 PAD mice compared with that in sham-operated mice. Exercise training inhibited the upregulation of Col3a1, Myf5, and Myogenin significantly. In KK-Ay PAD mice, only Gpr56 mRNA levels increased significantly compared with those in sham-operated mice. RNA sequence analysis revealed 33 and 166 differentially upregulated, and 363 and 99 downregulated, genes after exercise training in C57BL/6 PAD and KK-Ay PAD mice, respectively. In summary, we detected significant alterations of skeletal muscle genes after exercise in PAD mouse models and characterized their expression patterns.
耐力运动可改善外周动脉疾病(PAD)患者的行走能力,外周动脉疾病的特征是下肢缺血导致骨骼肌功能障碍。尽管已经报道了对正常动物和健康志愿者运动诱导变化的转录分析,但尚未有详细研究探讨PAD动物模型中运动诱导的基因表达变化。在此,我们确定了运动对两种PAD小鼠模型骨骼肌中mRNA表达的急性和慢性影响。研究了三个特定的基因类别:已知的运动反应基因(Pgc1a、Il6、Nr4a1、Nr4a2和Nr4a3);生肌和肌肉再生相关基因(Myf5、Myogenin、Myomaker和Myh3);以及Gpr56及其配体Col3a1。通过双侧股动脉结扎在正常C57BL/6和糖尿病KK-Ay小鼠中诱导PAD。从手术后1周开始,每周进行两次、每次30分钟的重复性跑步机耐力运动训练。在急性和慢性阶段均测量比目鱼肌中mRNA表达的变化。在急性期,运动诱导基因的转录水平水平在C57BL/6和糖尿病KK-Ay PAD小鼠中均显著增加;再生相关基因的水平变化不大,并且在两种模型中运动后Gpr56的水平立即显著增加。在慢性期,与假手术小鼠相比,久坐不动的C57BL/6 PAD小鼠中Pgc1a、Myf5、Myogenin、Myomaker、Myh3、Gpr�6和Col3a1的转录水平显著上调。运动训练显著抑制了Col3a1、Myf5和Myogenin的上调。在KK-Ay PAD小鼠中,与假手术小鼠相比,只有Gpr56 mRNA水平显著增加。RNA序列分析显示,在C57BL/6 PAD和KK-Ay PAD小鼠中,运动训练后分别有33个和166个基因差异上调,363个和99个基因下调。总之,我们在PAD小鼠模型中检测到运动后骨骼肌基因的显著变化,并对其表达模式进行了表征。