依托咪酯对幼龄大鼠癫痫的神经保护作用     

冀中豪  赵佳琪  权福实 《兽医大学学报》2014,(11):1839-1841

研究了癫痫对幼龄大鼠中枢神经元的损伤以及应用依托咪酯后的影响,旨在探讨依托咪酯对癫痫大鼠神经元的保护作用。大鼠随机分为试验组（72只）和对照组（C组,6只）,试验组分为模型组（KA组）、依托咪酯治疗组（Et组）,采用海仁酸（KA）诱导幼龄大鼠癫痫模型,通过甲酚紫染色观察受损的神经细胞以及热休克蛋白HSP-70的免疫反应阳性结果作为神经元损伤程度的指标,通过电镜观察海马神经元。结果显示,在KA组海马的CA3和DG区两种反应的阳性细胞数明显增多,而注射依托咪酯的大鼠海马相应区域阳性细胞数目明显减少。电镜观察结果显示依托咪酯组海马神经元损伤被抑制。结果表明,依托咪酯具有对海仁酸癫痫模型神经毒性的抑制作用,对海马神经元起到一定的保护作用。  相似文献   

Sequential alterations of glucocorticoid receptors in the hippocampus of STZ-treated type 1 diabetic rats     

Jae Hoon Shin  Je Kyung Seong  Sun Shin Yi 《Journal of veterinary science (Suw?n-si, Korea)》2014,15(1):19-26

Type 1 diabetes is a common metabolic disorder accompanied by increased blood glucose levels along with glucocorticoid and cognitive deficits. The disease is also thought to be associated with environmental changes in brain and constantly induces oxidative stress in patients. Therefore, glucocorticoid-mediated negative feedback mechanisms involving the glucocorticoid receptor (GR) binding site are very important to understand the development of this disease. Many researchers have used streptozotocin (STZ)-treated diabetic animals to study changes in GR expression in the brain. However, few scientists have evaluated the hyperglycemic period following STZ exposure. In the present study, we found GR expression in the hippocampus varied based on the period after STZ administration for up to 4 weeks. We performed immunohistochemistry and Western blotting to validate the sequential alterations of GR expression in the hippocampus of STZ-treated type 1 diabetic rats. GR protein expression increased significantly until week 3 but decreased at week 4 following STZ administration. GR expression after 70 mg/kg STZ administration was highest at 3 weeks post-treatment and decreased thereafter. Although STZ-induced increase in GR expression in diabetic animals has been described, our data indicate that researchers should consider the sequential GR expression changes during the hyperglycemic period following STZ exposure.  相似文献   

Differential expression of genes encoding neurotrophic factors and their receptors along the septal‐temporal axis of the rat hippocampus     

Atsushi Toyoda  Wataru Iio  Tatsuhiko Goto  Hiroaki Koike  Takamitsu Tsukahara 《Animal Science Journal》2014,85(12):986-993

The hippocampus plays a key role in learning and emotional regulation. The hippocampus’ function varies along its septotemporal axis, with the septal pole being more frequently involved in spatial learning and memory, and the temporal pole playing a greater role in emotional behaviors. In this study, we present findings aimed at checking the expression level of the genes encoding neurotrophins and their receptors, including nerve growth factor (NGF), brain‐derived neurotrophic factor (BDNF), neurotrophin‐3 (NT‐3), and their receptors (TrkA, TrkB and TrkC) in the hippocampus along the septotemporal axis. Using real‐time PCR, several different expression patterns were observed. Remarkably, the expression of both NT‐3 and TrkA genes in the septal hippocampus was higher than in the middle and temporal hippocampus. Higher expression of NT‐3 and TrkA may implicate active neurogenesis in the dentate gyrus (DG) of the septal hippocampus because more neurogenesis occurs in the septal than the temporal DG of rats. Finally, the results obtained in this study emphasize the importance of choosing the hippocampal portion along its septotemporal axis for any hippocampal molecular and biochemical experimental studies.  相似文献   

Differential patterns of nestin and glial fibrillary acidic protein expression in mouse hippocampus during postnatal development     

Joong-Sun Kim  Juhwan Kim  Yujin Kim  Miyoung Yang  Hyosun Jang  Sungwoon Kang  Jong-Choon Kim  Sung-Ho Kim  Taekyun Shin  Changjong Moon 《Journal of veterinary science (Suw?n-si, Korea)》2011,12(1):1-6

Intermediate filaments, including nestin and glial fibrillary acidic protein (GFAP), are important for the brain to accommodate neural activities and changes during development. The present study examined the temporal changes of nestin and GFAP protein levels in the postnatal development of the mouse hippocampus. Mouse hippocampi were sampled on postnatal day (PND) 1, 3, 6, 18, and 48. Western blot analysis showed that nestin expression was high at PND 1 and markedly decreased until PND 18. Conversely, GFAP expression was acutely increased in the early phase of postnatal development. Nestin immunoreactivity was localized mainly in the processes of ramified cells at PND 1, but expression subsequently decreased. In contrast, GFAP was evident mainly in the marginal cells of the hippocampus at PND 1, but immunoreactivity revealed satellite, radial, or ramified shapes of the cells from PND 6-48. This study demonstrates that the opposing pattern of nestin and GFAP expressions in mouse hippocampus during postnatal development occur in the early development stage (PND 1-18), suggesting that the opposing change of nestin and GFAP in early postnatal development is important for neural differentiation and positioning in the mouse hippocampus.  相似文献   

Immunohistochemical analysis of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) toxicity on the developmental dentate gyrus and hippocampal fimbria in fetal mice     

Yoshihiro KOBAYASHI  Tetsushi HIRANO  Takuya OMOTEHARA  Rie HASHIMOTO  Yuria UMEMURA  Hideto YUASA  Natsumi MASUDA  Naoto KUBOTA  Kiichi MINAMI  Shogo YANAI  Mitsuko ISHIHARA-SUGANO  Youhei MANTANI  Toshifumi YOKOYAMA  Hiroshi KITAGAWA  Nobuhiko HOSHI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(11):1355-1361

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中年CD-1小鼠背海马syntaxin 1水平的改变     

姚明仁  何燕  陈贵海 《安徽农业大学学报》2013,40(2):196

应用免疫组化技术检测13月龄(中年)和5月龄CD-1小鼠背海马突触前蛋白syntaxin 1的表达水平.结果显示,13月龄小鼠齿状回、CA1及CA3区各层syntaxin 1的相对含量较5月龄均显著下降.表明中年CD-1小鼠背海马syntaxin 1含量全面下调.  相似文献   

哺乳期锌缺乏对小鼠海马锌离子含量影响的研究     

李成  姚品  徐赫 《吉林林学院学报》2011,(3):304-306

目的检测哺乳期母鼠锌缺乏对其仔鼠大脑海马内锌离子含量的影响.方法 CD-1母鼠产后即喂以缺锌饲料（锌含量为0.85μg/g）以及去离子水,它们未断乳的仔鼠即作为锌缺乏组模型,在小鼠生后7、14、21 d,应用金属自显影技术检测海马中游离锌离子含量变化.结果与对照组相比,锌缺乏组未断乳仔鼠海马中的锌离子含量明显减少.结论哺乳期母鼠锌缺乏会导致仔鼠海马中游离锌离子含量显著减少.  相似文献   

电针“委中”对多裂肌损伤模型大鼠钙调蛋白信号通路的影响          下载免费PDF全文

白玉琢  徐菁  陈洁  张佳怡  许玥  鲁曼  李欣怡  霍泽军  张莉 《勤云标准版测试》2019,39(4):503-506

目的 探讨多裂肌损伤后,电针"委中"干预对多裂肌损伤过程中钙调蛋白信号通路的影响。方法 SD大鼠随机分为空白组、模型1 d组、模型3 d组、电针1 d组、电针3 d组,每组8只。电针组双侧"委中"电针,于治疗的第1、3天各组同步取材,采用酶联免疫吸附法检测多裂肌、脊髓、海马组织中CaM、CaMKⅡ、iNOS的含量。结果 模型1 d和3 d组,多裂肌、脊髓、海马CaM、CaMKⅡ含量显著高于空白组（P<0.01）;多裂肌、脊髓、海马iNOS含量高于空白组（P<0.05或P<0.01）。电针1 d后,多裂肌、脊髓、海马CaM、CaMKⅡ、iNOS含量显著低于模型1 d组（P<0.05或P<0.01）。电针3 d后,多裂肌、脊髓、海马CaM、CaMKⅡ、iNOS含量低于模型3 d组（P<0.05或P<0.01）。电针3 d后,脊髓、海马CaM、CaMKⅡ及多裂肌CaMKⅡ含量显著低于电针1 d组（P<0.01）,多裂肌CaM、iNOS和脊髓、海马iNOS含量与电针1 d组比较差异无统计学意义（P>0.05）。结论 多裂肌损伤早期,电针"委中"干预可通过抑制CaM、CaMKⅡ的过度激活,减少组织中iNOS的过多产生,减轻组织炎症损伤。  相似文献   

针刺大椎、百会、人中穴对大鼠脑缺血再灌注损伤后不同时间点海马脑红蛋白表达的影响     

颜虹  贺平  武姿含  蒋素容  田浩梅  陈楚淘 《勤云标准版测试》2018,38(2):165-168

目的 观察针刺大椎、百会、人中穴对大鼠脑缺血再灌注损伤后不同时间点海马脑红蛋白（neuroglobin,Ngb）表达的影响,探讨其脑保护作用的部分作用机制。方法 采用线栓法制备MCAO模型,将40只雄性SD大鼠随机分为假手术组、模型组、对照点组、穴位组4大组,每组再根据再灌注后时间分为24 h、72 h组,每组5只。完成治疗后,先行神经功能缺损评分再处死大鼠,再采用Western Blot法检测大鼠缺血侧海马Ngb的表达水平。结果 神经功能缺损评分：与假手术组比较,模型组、对照点组及穴位组神经功能缺损评分均升高,差异有统计学意义（P<0.05,P<0.01）;模型组、对照点组、穴位组三组神经功能缺损评分差异无统计学意义（P>0.05）。与24 h组比较,72 h模型组神经功能缺损评分差异无统计学意义（P>0.05）;72 h对照点组及穴位组神经功能缺损评分均下降,差异有统计学意义（P<0.05）。Ngb：与假手术组比较,模型组Ngb的表达水平明显降低（P<0.01）;与模型组比较,对照点组及穴位组Ngb的表达水平均明显升高（P<0.01）;与对照点组比较,穴位组Ngb的表达水平有升高,但差异无统计学意义（P>0.05）。与24 h组比较,72 h假手术组、模型组及对照点组Ngb的表达水平均有下降,但差异无统计学意义（P>0.05）;72 h穴位组Ngb的表达水平下降明显,差异有统计学意义（P<0.05）。结论 针刺能降低脑缺血再灌注损伤大鼠神经功能缺损评分,并可上调海马Ngb的表达水平,从而实现脑保护作用。  相似文献   

SNAP-25在成年期甲减大鼠海马内表达变化及甲状腺素治疗效应   总被引：1，自引：1，他引：0  

王迅  徐永霞  朱德发 《安徽农业大学学报》2010,37(1)

观察成年期甲状腺功能减退症(简称甲减)大鼠海马内突触相关蛋白SNAP-25(synaptosomal associated protein of 25 kD)改变及不同剂量甲状腺素治疗后的恢复状况,探讨甲减脑损伤及恢复可能的分子机制。结果显示,甲减大鼠血清T3、T4水平显著低于正常对照组(P<0.05),背侧海马突触小体内SNAP-25的表达水平显著高于正常对照组(P<0.05);常规剂量替代治疗组大鼠血清T3、T4恢复至正常水平,SNAP-25表达水平与甲减组比较未见明显改变(P>0.05);经大剂量替代治疗后血清T3、T4高于正常;SNAP-25的表达恢复到正常水平(P<0.05)。这些结果提示,成年期甲减大鼠海马内SNAP-25表达增加,甲状腺素治疗能使其恢复,大剂量替代治疗使SNAP-25表达恢复至正常水平。  相似文献