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Circular RNA TLK1Aggravates NeuronalInjury andNeurological Deficitsafter Ischemic Strokevia miR-335-3p/TIPARP Fangfang WuBing HanShusheng Wu2019 год

Circular RNA TLK1 Aggravates Neuronal Injury and Neurological Deficits after Ischemic Stroke via miR-335-3p/TIPARP
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Аннотация: Circular RNAs (circRNAs) are expressed at high levels in the brain and are involved in various CNS diseases. However, the potential role of circRNAs in ischemic stroke-associated neuronal injury remains largely unknown. Here, we investigated the important functions of circRNA TLK1 (circTLK1) in this process. The levels of circTLK1 were significantly increased in brain tissues in a mouse model of focal cerebral ischemia and reperfusion. Knockdown of circTLK1 significantly decreased infarct volumes, attenuated neuronal injury, and improved neurological deficits. Furthermore, circTLK1 functioned as an endogenous miR-335-3p sponge to inhibit miR-335-3p activity, resulting in the increase of 2,3,7,8-tetrachlorodibenzo-p-dioxin-inducible poly (ADP-ribose) polymerase expression and a subsequent exacerbation of neuronal injury. Clinical studies confirmed increased levels of circTLK1 in the plasma of patients with acute ischemic stroke (59 males and 12 females). Our findings reveal a detrimental role of circTLK1 in ischemic brain injury. SIGNIFICANCE STATEMENT The extent of neuronal injury after brain ischemia is a primary factor determining stroke outcomes. However, the molecular switches that control the death of ischemic neurons are poorly understood. While our previous studies indicated the involvement of circRNAs in ischemic stroke, the potential role of circRNAs in neuronal injury remains largely unknown. The levels of circTLK1 were significantly increased in the brain tissue and plasma isolated from animal models of ischemic stroke and patients. Knockdown of circTLK1 significantly decreased infarct volumes, attenuated neuronal injury, and improved subsequent long-term neurological deficits. To our knowledge, these results provide the first definitive evidence that circTLK1 is detrimental in ischemic stroke.
Год издания: 2019
Авторы: Fangfang Wu, Bing Han, Shusheng Wu, Li Yang, Shuo Leng, Mingyue Li, Jiefeng Liao, Guangtian Wang, Qingqing Ye, Yuan Zhang, Haifeng Chen, Xufeng Chen, Zhong Ming, Yun Xu, Qiang Liu, John H. Zhang, Honghong Yao
Издательство: Society for Neuroscience
Источник: Journal of Neuroscience
Ключевые слова: Circular RNAs in diseases, MicroRNA in disease regulation, Cancer-related molecular mechanisms research
Другие ссылки: Journal of Neuroscience (PDF)
Journal of Neuroscience (HTML)
Europe PMC (PubMed Central) (PDF)
Europe PMC (PubMed Central) (HTML)
PubMed Central (HTML)
PubMed (HTML)