Objective To study the changes of the nitric oxide(NO) in process of neonate hypoxic－ ischemic encephalopathy(HIE) and the relations between the concentrations of NO and HIE. Methods Tested the concentrations of NO i...Objective To study the changes of the nitric oxide(NO) in process of neonate hypoxic－ ischemic encephalopathy(HIE) and the relations between the concentrations of NO and HIE. Methods Tested the concentrations of NO in CSF of newborn infants suffered HIE the third day and in plasma of newborn infants suffered HIE just attacked instant(within 2 hours), the first day ,the third day and restoring stage and compared with them of normal contrast term. We tried to analyse the reasons and significance of NO change .Results The NO concentration is the highest in plasma of newborn infants suffered HIE the first day. There is significant difference(P<0.01) after comparing the NO concentrations in plasmas of newborn infants suffered HIE just attacked instant, the first day, the third day with of normal contrast team respectively. But there is not significant difference(P >0.05) between NO in plasmas of restoring stage and of normal contrast team. There is positive correlation between the NO concentration in plasma and in CSF of newborn infants suffered HIE the third day. The more serious the disease is, the higher the NO concentration is, the worse the prognosis is. Conclusion NO play along with the course of HIE and play an important role in neonate HIE. Testing the concentration of NO in plasma and in CSF can also help to judge the degree of disease.展开更多
Perinatal hypoxic-ischemic-encephalopathy significantly contributes to neonatal death and life-long disability such as cerebral palsy. Advances in signal processing and machine learning have provided the research comm...Perinatal hypoxic-ischemic-encephalopathy significantly contributes to neonatal death and life-long disability such as cerebral palsy. Advances in signal processing and machine learning have provided the research community with an opportunity to develop automated real-time identification techniques to detect the signs of hypoxic-ischemic-encephalopathy in larger electroencephalography/amplitude-integrated electroencephalography data sets more easily. This review details the recent achievements, performed by a number of prominent research groups across the world, in the automatic identification and classification of hypoxic-ischemic epileptiform neonatal seizures using advanced signal processing and machine learning techniques. This review also addresses the clinical challenges that current automated techniques face in order to be fully utilized by clinicians, and highlights the importance of upgrading the current clinical bedside sampling frequencies to higher sampling rates in order to provide better hypoxic-ischemic biomarker detection frameworks. Additionally, the article highlights that current clinical automated epileptiform detection strategies for human neonates have been only concerned with seizure detection after the therapeutic latent phase of injury. Whereas recent animal studies have demonstrated that the latent phase of opportunity is critically important for early diagnosis of hypoxic-ischemic-encephalopathy electroencephalography biomarkers and although difficult, detection strategies could utilize biomarkers in the latent phase to also predict the onset of future seizures.展开更多
Alongside clinical achievements,experiments conducted on animal models (including primate or non-primate) have been effective in the understanding of various pathophysiological aspects of perinatal hypoxic/ ischemic e...Alongside clinical achievements,experiments conducted on animal models (including primate or non-primate) have been effective in the understanding of various pathophysiological aspects of perinatal hypoxic/ ischemic encephalopathy (HIE).Due to the reasonably fair degree of flexibility with experiments,most of the research around HIE in the literature has been largely concerned with the neurodevelopmental outcome or how the frequency and duration of HI seizures could relate to the severity of perinatal brain injury,following HI insult.This survey concentrates on how EEG experimental studies using asphyxiated animal models (in rodents,piglets,sheep and non-human primate monkeys) provide a unique opportunity to examine from the exact time of HI event to help gain insights into HIE where human studies become difficult.展开更多
目的:探究阿魏酸钠(SF)通过miR-216b-3p/Nrf2通路对缺氧缺血性脑病(HIE)胚胎大鼠大脑的干预作用以及减轻氧化应激损伤的作用机制。方法:将成年雌性SD大鼠和雄鼠,按照3∶1比例合笼获得怀孕的雌鼠。然后将孕鼠分为假手术组(sham)、缺氧缺...目的:探究阿魏酸钠(SF)通过miR-216b-3p/Nrf2通路对缺氧缺血性脑病(HIE)胚胎大鼠大脑的干预作用以及减轻氧化应激损伤的作用机制。方法:将成年雌性SD大鼠和雄鼠,按照3∶1比例合笼获得怀孕的雌鼠。然后将孕鼠分为假手术组(sham)、缺氧缺血性脑病模型组(HIE)、SF低剂量组(HIE+SF-L)和SF高剂量组(HIE+SF-H)。通过无创止血钳夹闭子宫两侧动脉和卵巢血管法制备胚胎大鼠HIE模型。SF治疗组腹膜腔注射SF。采用HE染色观察胚胎大鼠大脑皮质的病理变化;免疫荧光观察核因子红细胞系2相关因子2(Nrf2)、过氧化还原酶1(PRDX1)的表达情况;Western Blot检测胚胎大鼠脑组织中Nrf2和PRDX1蛋白的表达;real time RT-PCR检测miR-216b-3p的表达以及Nrf2和PRDX1的mRNA表达;WST-8法和TBA法检测脑组织中的超氧化物歧化酶(SOD)活性和丙二醛(MDA)含量。结果:与sham组对比,HIE组胚胎大鼠的大脑损伤加重,病理改变明显;HIE组中Nrf2蛋白表达和mRNA水平降低(P<0.05),PRDX1的蛋白水平和mRNA水平显著上调(P<0.05),miR-216b-3p表达水平显著升高(P<0.05);并且Nrf2的平均荧光强度显著降低(P<0.05),PRDX1的平均荧光强度显著增加(P<0.05);SOD活性显著下调,MDA含量显著增加(P<0.05)。与HIE组对比,各剂量SF组的大脑皮质病理结构明显改善,脑损伤减轻;Nrf2和PRDX1的蛋白表达、mRNA水平以及平均荧光强度均显著上升(P<0.05);miR-216b-3p表达水平均显著下调,以SF高剂量组下调最为显著(P<0.05);并且SOD活性显著上调,MDA含量显著下调(P<0.05)。结论:SF通过miR-216b-3p/Nrf2信号通路在HIE的发生发展过程中发挥重要作用,并减轻胚胎大鼠受到的氧化应激损伤。展开更多
基金Foundation:Guangdong province board of health item (number 199906)
文摘Objective To study the changes of the nitric oxide(NO) in process of neonate hypoxic－ ischemic encephalopathy(HIE) and the relations between the concentrations of NO and HIE. Methods Tested the concentrations of NO in CSF of newborn infants suffered HIE the third day and in plasma of newborn infants suffered HIE just attacked instant(within 2 hours), the first day ,the third day and restoring stage and compared with them of normal contrast term. We tried to analyse the reasons and significance of NO change .Results The NO concentration is the highest in plasma of newborn infants suffered HIE the first day. There is significant difference(P<0.01) after comparing the NO concentrations in plasmas of newborn infants suffered HIE just attacked instant, the first day, the third day with of normal contrast team respectively. But there is not significant difference(P >0.05) between NO in plasmas of restoring stage and of normal contrast team. There is positive correlation between the NO concentration in plasma and in CSF of newborn infants suffered HIE the third day. The more serious the disease is, the higher the NO concentration is, the worse the prognosis is. Conclusion NO play along with the course of HIE and play an important role in neonate HIE. Testing the concentration of NO in plasma and in CSF can also help to judge the degree of disease.
基金supported by the Auckland Medical Research Foundation,No.1117017(to CPU)
文摘Perinatal hypoxic-ischemic-encephalopathy significantly contributes to neonatal death and life-long disability such as cerebral palsy. Advances in signal processing and machine learning have provided the research community with an opportunity to develop automated real-time identification techniques to detect the signs of hypoxic-ischemic-encephalopathy in larger electroencephalography/amplitude-integrated electroencephalography data sets more easily. This review details the recent achievements, performed by a number of prominent research groups across the world, in the automatic identification and classification of hypoxic-ischemic epileptiform neonatal seizures using advanced signal processing and machine learning techniques. This review also addresses the clinical challenges that current automated techniques face in order to be fully utilized by clinicians, and highlights the importance of upgrading the current clinical bedside sampling frequencies to higher sampling rates in order to provide better hypoxic-ischemic biomarker detection frameworks. Additionally, the article highlights that current clinical automated epileptiform detection strategies for human neonates have been only concerned with seizure detection after the therapeutic latent phase of injury. Whereas recent animal studies have demonstrated that the latent phase of opportunity is critically important for early diagnosis of hypoxic-ischemic-encephalopathy electroencephalography biomarkers and although difficult, detection strategies could utilize biomarkers in the latent phase to also predict the onset of future seizures.
基金supported by the Auckland Medical Research Foundation,No.1117017(to CPU)
文摘Alongside clinical achievements,experiments conducted on animal models (including primate or non-primate) have been effective in the understanding of various pathophysiological aspects of perinatal hypoxic/ ischemic encephalopathy (HIE).Due to the reasonably fair degree of flexibility with experiments,most of the research around HIE in the literature has been largely concerned with the neurodevelopmental outcome or how the frequency and duration of HI seizures could relate to the severity of perinatal brain injury,following HI insult.This survey concentrates on how EEG experimental studies using asphyxiated animal models (in rodents,piglets,sheep and non-human primate monkeys) provide a unique opportunity to examine from the exact time of HI event to help gain insights into HIE where human studies become difficult.
文摘目的:探究阿魏酸钠(SF)通过miR-216b-3p/Nrf2通路对缺氧缺血性脑病(HIE)胚胎大鼠大脑的干预作用以及减轻氧化应激损伤的作用机制。方法:将成年雌性SD大鼠和雄鼠,按照3∶1比例合笼获得怀孕的雌鼠。然后将孕鼠分为假手术组(sham)、缺氧缺血性脑病模型组(HIE)、SF低剂量组(HIE+SF-L)和SF高剂量组(HIE+SF-H)。通过无创止血钳夹闭子宫两侧动脉和卵巢血管法制备胚胎大鼠HIE模型。SF治疗组腹膜腔注射SF。采用HE染色观察胚胎大鼠大脑皮质的病理变化;免疫荧光观察核因子红细胞系2相关因子2(Nrf2)、过氧化还原酶1(PRDX1)的表达情况;Western Blot检测胚胎大鼠脑组织中Nrf2和PRDX1蛋白的表达;real time RT-PCR检测miR-216b-3p的表达以及Nrf2和PRDX1的mRNA表达;WST-8法和TBA法检测脑组织中的超氧化物歧化酶(SOD)活性和丙二醛(MDA)含量。结果:与sham组对比,HIE组胚胎大鼠的大脑损伤加重,病理改变明显;HIE组中Nrf2蛋白表达和mRNA水平降低(P<0.05),PRDX1的蛋白水平和mRNA水平显著上调(P<0.05),miR-216b-3p表达水平显著升高(P<0.05);并且Nrf2的平均荧光强度显著降低(P<0.05),PRDX1的平均荧光强度显著增加(P<0.05);SOD活性显著下调,MDA含量显著增加(P<0.05)。与HIE组对比,各剂量SF组的大脑皮质病理结构明显改善,脑损伤减轻;Nrf2和PRDX1的蛋白表达、mRNA水平以及平均荧光强度均显著上升(P<0.05);miR-216b-3p表达水平均显著下调,以SF高剂量组下调最为显著(P<0.05);并且SOD活性显著上调,MDA含量显著下调(P<0.05)。结论:SF通过miR-216b-3p/Nrf2信号通路在HIE的发生发展过程中发挥重要作用,并减轻胚胎大鼠受到的氧化应激损伤。
