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Protective Effect of Fenofibrate on Oxidative Stress-Induced Apoptosis in Retinal-Choroidal Vascular Endothelial Cells: Implication for Diabetic Retinopathy Treatment.
Antioxidants ( IF 6.0 ) Pub Date : 2020-08-05 , DOI: 10.3390/antiox9080712
Ying-Jung Hsu , Chao-Wen Lin , Sheng-Li Cho , Wei-Shiung Yang , Chung-May Yang , Chang-Hao Yang

Diabetic retinopathy (DR) is an important microvascular complication of diabetes and one of the leading causes of blindness in developed countries. Two large clinical studies showed that fenofibrate, a peroxisome proliferator-activated receptor type α (PPAR-α) agonist, reduces DR progression. We evaluated the protective effects of fenofibrate on retinal/choroidal vascular endothelial cells under oxidative stress and investigated the underlying mechanisms using RF/6A cells as the model system and paraquat (PQ) to induce oxidative stress. Pretreatment with fenofibrate suppressed reactive oxygen species (ROS) production, decreased cellular apoptosis, diminished the changes in the mitochondrial membrane potential, increased the mRNA levels of peroxiredoxin (Prx), thioredoxins (Trxs), B-cell lymphoma 2 (Bcl-2), and Bcl-xl, and reduced the level of B-cell lymphoma 2-associated X protein (Bax) in PQ-stimulated RF/6A cells. Western blot analysis revealed that fenofibrate repressed apoptosis through cytosolic and mitochondrial apoptosis signal-regulated kinase-1 (Ask)-Trx-related signaling pathways, including c-Jun amino-terminal kinase (JNK) phosphorylation, cytochrome c release, caspase 3 activation, and poly (ADP-ribose) polymerase-1 (PARP-1) cleavage. These protective effects of fenofibrate on RF/6A cells may be attributable to its anti-oxidative ability. Our research suggests that fenofibrate could serve as an effective adjunct therapy for ocular oxidative stress-related disorders, such as DR.

中文翻译:

非诺贝特对氧化应激诱导的视网膜-脉络膜血管内皮细胞凋亡的保护作用:对糖尿病性视网膜病的治疗意义。

糖尿病性视网膜病(DR)是糖尿病的重要微血管并发症,并且是发达国家失明的主要原因之一。两项大型临床研究表明,非诺贝特是一种过氧化物酶体增殖物激活的α型受体(PPAR-α)激动剂,可降低DR进展。我们评估了非诺贝特在氧化应激下对视网膜/脉络膜血管内皮细胞的保护作用,并研究了使用RF / 6A细胞作为模型系统和百草枯(PQ)诱导氧化应激的潜在机制。非诺贝特预处理抑制活性氧(ROS)的产生,减少细胞凋亡,减少线粒体膜电位的变化,增加过氧化物酶(Prx),硫氧还蛋白(Trxs),B细胞淋巴瘤2(Bcl-2)的mRNA水平。以及Bcl-xl,并降低了PQ刺激的RF / 6A细胞中B细胞淋巴瘤2相关X蛋白(Bax)的水平。Western blot分析显示,非诺贝特通过细胞溶质和线粒体凋亡信号调节激酶-1(Ask)-Trx相关信号通路抑制凋亡,包括c-Jun氨基末端激酶(JNK)磷酸化,细胞色素c释放,胱天蛋白酶3活化,和聚(ADP-核糖)聚合酶-1(PARP-1)裂解。非诺贝特对RF / 6A细胞的这些保护作用可能归因于其抗氧化能力。我们的研究表明,非诺贝特可以作为眼部氧化应激相关疾病(例如DR)的有效辅助疗法。Western blot分析显示,非诺贝特通过细胞溶质和线粒体凋亡信号调节激酶-1(Ask)-Trx相关信号通路抑制凋亡,包括c-Jun氨基末端激酶(JNK)磷酸化,细胞色素c释放,胱天蛋白酶3活化,和聚(ADP-核糖)聚合酶-1(PARP-1)裂解。非诺贝特对RF / 6A细胞的这些保护作用可能归因于其抗氧化能力。我们的研究表明,非诺贝特可以作为眼部氧化应激相关疾病(例如DR)的有效辅助疗法。Western blot分析显示,非诺贝特通过细胞溶质和线粒体凋亡信号调节激酶-1(Ask)-Trx相关信号通路抑制凋亡,包括c-Jun氨基末端激酶(JNK)磷酸化,细胞色素c释放,胱天蛋白酶3活化,和聚(ADP-核糖)聚合酶-1(PARP-1)裂解。非诺贝特对RF / 6A细胞的这些保护作用可能归因于其抗氧化能力。我们的研究表明,非诺贝特可以作为眼部氧化应激相关疾病(例如DR)的有效辅助疗法。非诺贝特对RF / 6A细胞的这些保护作用可能归因于其抗氧化能力。我们的研究表明,非诺贝特可以作为眼部氧化应激相关疾病(例如DR)的有效辅助疗法。非诺贝特对RF / 6A细胞的这些保护作用可能归因于其抗氧化能力。我们的研究表明,非诺贝特可以作为眼部氧化应激相关疾病(例如DR)的有效辅助疗法。
更新日期:2020-08-05
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