Peripheral nerve injury has been shown to result in ectopic spontaneous discharges on soma and injured sites of sensory neurons, thereby inducing neuropathic pain. With the increase of membrane proteins on soma and in...Peripheral nerve injury has been shown to result in ectopic spontaneous discharges on soma and injured sites of sensory neurons, thereby inducing neuropathic pain. With the increase of membrane proteins on soma and injured site neurons, the negatively charged sialic acids bind to the external domains of membrane proteins, resulting in an increase of this charge. We therefore speculate that the electrophoretic velocity of injured neurons may be faster than non-injured neurons. The present study established rat models of neuropathic pain via chronic constriction injury. Results of the cell electrophoresis test revealed that the electrophoretic velocity of injured neuronal cells was faster than that of non-injured （control） cells. We then treated cells with divalent cations of Ca2＋ and organic compounds with positive charges, polylysine to counteract the negatively charged sialic acids, or neuraminidase to specifically remove sialic acids from the membrane surface of injured neurons. All three treatments significantly reduced the electrophoretic velocity of injured neuronal cells. These findings suggest that enhanced sialic acids on injured neurons may accelerate the electrophoretic velocity of injured neurons.展开更多
Temporal lobe epilepsy is associated with astrogliosis. Notchl signaling can induce astrogliosis in glioma. However, it remains unknown whether Notchl signaling is involved in the pathogenesis of epilepsy. This study ...Temporal lobe epilepsy is associated with astrogliosis. Notchl signaling can induce astrogliosis in glioma. However, it remains unknown whether Notchl signaling is involved in the pathogenesis of epilepsy. This study investigated the presence of Notchl, hairy and enhancer of split-l, and glial fibrillary acidic protein in the temporal neocortex and hippocampus of lithium-pilocar- pine-treated rats. The presence of Notchl and hairy and enhancer of split-1 was also explored in brain tissues of patients with intractable temporal lobe epilepsy. Quantitative electroencephalo- gram analysis and behavioral observations were used as auxiliary measures. Results revealed that the presence of Notchl, hairy and enhancer of split-l, and glial fibriUary acidic protein were en- hanced in status epilepticus and vehicle-treated spontaneous recurrent seizures rats, but remain unchanged in the following groups： control, absence of either status epilepticus or spontaneous recurrent seizures, and zileuton-treated spontaneous recurrent seizures. Compared with patient control cases, the presences of Notch1 and hairy and enhancer of split- 1 were upregulated in the temporal neocortex of patients with intractable temporal lobe epilepsy. Therefore, these results suggest that Notchl signaling may play an important role in the onset of temporal lobe epilepsy via astrogliosis. Furthermore, zileuton may be a potential therapeutic strategy for temporal lobe epilepsy by blocking Notchl signaling.展开更多
背景:目前认为低氧诱导因子1α是维持机体细胞内氧稳态的最重要调控因子之一,骨形态发生蛋白6是成骨活性最强的骨形态发生蛋白之一,实验拟构建二者共表达的骨髓间充质干细胞系,以研究细胞在低氧状态下的耐受及功能受益问题。目的:探讨...背景:目前认为低氧诱导因子1α是维持机体细胞内氧稳态的最重要调控因子之一,骨形态发生蛋白6是成骨活性最强的骨形态发生蛋白之一,实验拟构建二者共表达的骨髓间充质干细胞系,以研究细胞在低氧状态下的耐受及功能受益问题。目的:探讨体外模拟低氧环境下低氧诱导因子1α和骨形态发生蛋白6协同过表达骨髓间充质干细胞的成骨和成血管生物学特性。方法:分离培养鉴定SD大鼠骨髓间充质干细胞,将已构建好的携带有骨形态发生蛋白6和低氧诱导因子1α双基因的腺病毒真核表达载体共同感染骨髓间充质干细胞,在体积分数为21%O_2,2%O_2条件下分别进行培养,并以常氧状态下未转染的骨髓间充质干细胞作为对照组,RT-qPCR检测各组细胞HIF-1α、VEGF、BMP-6、GLUT-1、SIRT-1、OCN、RUNX2、AKP的m RNA水平。各组骨髓间充质干细胞与人脐静脉内皮细胞共培养后,观察体外小管形成能力;各组骨髓间充质干细胞经成骨诱导培养基干预后,碱性磷酸酶染色及茜素红染色鉴定成骨效果。结果与结论:(1)流式细胞仪检测结果显示第4代骨髓间充质干细胞高表达CD29、CD90、CD44,低表达CD45、CD11、CD34;(2)低氧组骨髓间充质干细胞VEGF、GLUT-1、SIRT-1、OCN、RUNX2、AKP m RNA表达水平高于常氧组(P<0.01);(3)低氧组小管形成数量要明显高于对照组,差异有非常显著性意义(P<0.01);(4)低氧组细胞出现更多的钙结节及圆形矿化结节;(5)上述结果表明,低氧诱导因子1α与骨形态发生蛋白6协同过表达骨髓间充质干细胞在体外低氧环境下具有更强的血管生成及成骨分化能力。展开更多
Surface modified nanostructured ZnO was prepared by means of ultrasonic induced reaction within microemulsion croemulsion system consisting of surfactants such as PEG, Span 80 and cyclohaxane/H2O. The morphology, inte...Surface modified nanostructured ZnO was prepared by means of ultrasonic induced reaction within microemulsion croemulsion system consisting of surfactants such as PEG, Span 80 and cyclohaxane/H2O. The morphology, interaction between nano ZnO particles and surfactants, UV-absorption behaviors were characterized by TEM, IR and UV.展开更多
基金supported by the Natural Science Foundation of Shanxi Province in China,No.2012011042-3
文摘Peripheral nerve injury has been shown to result in ectopic spontaneous discharges on soma and injured sites of sensory neurons, thereby inducing neuropathic pain. With the increase of membrane proteins on soma and injured site neurons, the negatively charged sialic acids bind to the external domains of membrane proteins, resulting in an increase of this charge. We therefore speculate that the electrophoretic velocity of injured neurons may be faster than non-injured neurons. The present study established rat models of neuropathic pain via chronic constriction injury. Results of the cell electrophoresis test revealed that the electrophoretic velocity of injured neuronal cells was faster than that of non-injured （control） cells. We then treated cells with divalent cations of Ca2＋ and organic compounds with positive charges, polylysine to counteract the negatively charged sialic acids, or neuraminidase to specifically remove sialic acids from the membrane surface of injured neurons. All three treatments significantly reduced the electrophoretic velocity of injured neuronal cells. These findings suggest that enhanced sialic acids on injured neurons may accelerate the electrophoretic velocity of injured neurons.
基金funded by the Natural Science Foundation of Hubei Province in China,No.02.02.040458
文摘Temporal lobe epilepsy is associated with astrogliosis. Notchl signaling can induce astrogliosis in glioma. However, it remains unknown whether Notchl signaling is involved in the pathogenesis of epilepsy. This study investigated the presence of Notchl, hairy and enhancer of split-l, and glial fibrillary acidic protein in the temporal neocortex and hippocampus of lithium-pilocar- pine-treated rats. The presence of Notchl and hairy and enhancer of split-1 was also explored in brain tissues of patients with intractable temporal lobe epilepsy. Quantitative electroencephalo- gram analysis and behavioral observations were used as auxiliary measures. Results revealed that the presence of Notchl, hairy and enhancer of split-l, and glial fibriUary acidic protein were en- hanced in status epilepticus and vehicle-treated spontaneous recurrent seizures rats, but remain unchanged in the following groups： control, absence of either status epilepticus or spontaneous recurrent seizures, and zileuton-treated spontaneous recurrent seizures. Compared with patient control cases, the presences of Notch1 and hairy and enhancer of split- 1 were upregulated in the temporal neocortex of patients with intractable temporal lobe epilepsy. Therefore, these results suggest that Notchl signaling may play an important role in the onset of temporal lobe epilepsy via astrogliosis. Furthermore, zileuton may be a potential therapeutic strategy for temporal lobe epilepsy by blocking Notchl signaling.
文摘背景:目前认为低氧诱导因子1α是维持机体细胞内氧稳态的最重要调控因子之一,骨形态发生蛋白6是成骨活性最强的骨形态发生蛋白之一,实验拟构建二者共表达的骨髓间充质干细胞系,以研究细胞在低氧状态下的耐受及功能受益问题。目的:探讨体外模拟低氧环境下低氧诱导因子1α和骨形态发生蛋白6协同过表达骨髓间充质干细胞的成骨和成血管生物学特性。方法:分离培养鉴定SD大鼠骨髓间充质干细胞,将已构建好的携带有骨形态发生蛋白6和低氧诱导因子1α双基因的腺病毒真核表达载体共同感染骨髓间充质干细胞,在体积分数为21%O_2,2%O_2条件下分别进行培养,并以常氧状态下未转染的骨髓间充质干细胞作为对照组,RT-qPCR检测各组细胞HIF-1α、VEGF、BMP-6、GLUT-1、SIRT-1、OCN、RUNX2、AKP的m RNA水平。各组骨髓间充质干细胞与人脐静脉内皮细胞共培养后,观察体外小管形成能力;各组骨髓间充质干细胞经成骨诱导培养基干预后,碱性磷酸酶染色及茜素红染色鉴定成骨效果。结果与结论:(1)流式细胞仪检测结果显示第4代骨髓间充质干细胞高表达CD29、CD90、CD44,低表达CD45、CD11、CD34;(2)低氧组骨髓间充质干细胞VEGF、GLUT-1、SIRT-1、OCN、RUNX2、AKP m RNA表达水平高于常氧组(P<0.01);(3)低氧组小管形成数量要明显高于对照组,差异有非常显著性意义(P<0.01);(4)低氧组细胞出现更多的钙结节及圆形矿化结节;(5)上述结果表明,低氧诱导因子1α与骨形态发生蛋白6协同过表达骨髓间充质干细胞在体外低氧环境下具有更强的血管生成及成骨分化能力。
文摘Surface modified nanostructured ZnO was prepared by means of ultrasonic induced reaction within microemulsion croemulsion system consisting of surfactants such as PEG, Span 80 and cyclohaxane/H2O. The morphology, interaction between nano ZnO particles and surfactants, UV-absorption behaviors were characterized by TEM, IR and UV.
