首页> 外文期刊>Oral diseases >Genistein attenuates genioglossus muscle fatigue under chronic intermittent hypoxia by down-regulation of oxidative stress level and up-regulation of antioxidant enzyme activity through ERK1/2 signaling pathway.
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Genistein attenuates genioglossus muscle fatigue under chronic intermittent hypoxia by down-regulation of oxidative stress level and up-regulation of antioxidant enzyme activity through ERK1/2 signaling pathway.

机译:金雀异黄素通过下调氧化应激水平和通过ERK1 / 2信号通路上调抗氧化酶活性来减轻慢性间歇性缺氧下的舌肌疲劳。

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OBJECTIVE: This study aims to investigate the effects of genistein on contractile properties of genioglossus under chronic intermittent hypoxia (CIH) conditions and its relationship with oxidative stress, antioxidant enzyme, and ERK1/2 signaling pathway. MATERIALS AND METHODS: Fifty female Sprague-Dawley rats were randomly divided into five groups 1 week after ovariectomy: the normal control group, the CIH group, the CIH with low-dose, medium-dose, and high-dose genistein groups. Rats in the latter four groups were exposed to CIH for 5 weeks. Twitch tension, tetanic tension, and fatigue resistance of genioglossus were investigated. Malondialdehyde (MDA) and mitochondrial reactive oxygen species (ROS), enzymatic activity of superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT), and ERK1/2 were detected. RESULTS: Muscle fatigue resistance and enzymatic activity of GPx, CAT, and SOD were reduced after CIH exposure and improved by different doses of genistein at different degrees. CIH increased the level of ROS and MDA, and they were returned to normal by genistein. The expression of phospho-ERK1/2 is opposite to the changes in muscle fatigue resistance. CONCLUSION: Chronic intermittent hypoxia decreases fatigue resistance of genioglossus, and genistein treatment reverses the fatigability of genioglossus by down-regulation of oxidative stress level and up-regulation of antioxidant enzymatic activity probably through ERK1/2 signaling pathway.
机译:目的:研究染料木黄酮对慢性间歇性缺氧(CIH)条件下舌肌收缩特性的影响及其与氧化应激,抗氧化酶和ERK1 / 2信号通路的关系。材料与方法:50只雌性Sprague-Dawley大鼠在卵巢切除术后1周随机分为五组:正常对照组,CIH组,低剂量,中剂量和高剂量染料木黄酮CIH组。后四组的大鼠暴露于CIH 5周。研究了glo舌肌的抽搐张力,强直张力和抗疲劳性。检测丙二醛(MDA)和线粒体活性氧(ROS),超氧化物歧化酶(SOD),谷胱甘肽过氧化物酶(GPx),过氧化氢酶(CAT)和ERK1 / 2的酶活性。结果:CIH暴露后GPx,CAT和SOD的肌肉抗疲劳性和酶活性降低,不同剂量的染料木黄酮在不同程度上改善了肌肉的抗疲劳性和酶活性。 CIH增加了ROS和MDA的水平,染料木黄酮使它们恢复正常。磷酸化-ERK1 / 2的表达与肌肉抗疲劳性的变化相反。结论:慢性间歇性缺氧会降低舌肌的疲劳抵抗力,而染料木黄酮治疗可能通过ERK1 / 2信号通路下调氧化应激水平和上调抗氧化酶活性而逆转舌肌的易疲劳性。

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