首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 93 毫秒
1.
目的探讨5-羟色胺1A(5-HT1A)受体与匹罗卡品诱导的癫痫大鼠合并抑郁海马齿状回神经发生的关系。方法从匹罗卡品诱导的慢性自发性颞叶癫痫大鼠中筛选出合并抑郁的大鼠3 2只,随机分成模型组、卡马西平(CBZ)组、CBZ+8-OH-DPAT低剂量(0.1 mg/kg)组、CBZ+8-OH-DPAT高剂量(1.0 mg/kg)组,每组8只。对照组8只,注射生理盐水(1 0 m l/kg)。药物干预后,制备大鼠脑片,利用免疫组织化学方法检测大鼠的神经发生。结果模型组海马齿状回神经发生较对照组明显增多,差异有统计学意义(P<0.0 5)。CBZ组、CBZ+8-OH-DPAT低剂量组、CBZ+8-OH-DPAT高剂量组较模型组神经发生明显增多,差异有统计学意义(P<0.0 5)。CBZ+8-OH-DPAT高剂量组较CBZ组、CBZ+8-OH-DPAT低剂量组神经发生明显增多,差异有统计学意义(P<0.0 5)。但CBZ组与CBZ+8-OH-DPAT低剂量组比较神经发生的差异没有统计学意义(P>0.0 5)。结论高剂量的5-HT1A受体激动剂8-OH-DPAT在实验的过程中能够增加癫痫合并抑郁大鼠的神经发生。  相似文献   

2.
目的 探讨慢性不可预见性轻度应激(CUMS)模型大鼠各脑区(海马、中缝核、前额叶及纹状体)5-HT1A受体表达及与旷场行为变化的关系;西酞普兰对5-HT1A受体表达的影响.方法 将24只雄性SD大鼠随机分为3组(n=8):A组为对照组;B组为CUMS应激组;C组为CUMS应激+西酞普兰用药组(每天腹腔注射西酞普兰水溶液2 ml,10mg/kg).实验为期6周,通过旷场试验评价大鼠行为,6周后处死大鼠获取脑组织,采用Real-Time PCR检测各脑区5-HT1A mRNA表达水平,并分析其与矿场行为的相关性.结果 B组海马5-HT1A mRNA表达较A组有增高趋势(P=0.05),其余各脑区5-HT1A mRNA表达均差异无统计学意义(P>0.05).海马5-HT1AmRNA表达大鼠移动次数、转身次数呈正相关,与总不动时间呈负相关;中缝核、纹状体5-HT1A mR-NA表达与中心移动距离呈正相关,纹状体5-HT1A mRNA表达与中心停留时间呈正相关(P均<0.05).结论 慢性应激可能会引起海马5-HT1A受体表达增高;抗抑郁剂西酞普兰对5-HT1A受体表达无影响.5-HT1A mRNA表达与旷场行为变化有相关性.  相似文献   

3.
目的 观察文拉法辛对慢性应激抑郁大鼠海马区可塑性相关蛋白mRNA表达的影响.方法 用慢性不可预见应激(CUS)方法建立大鼠抑郁模型,给予2种剂量(5 mg/kg体质量和10 mg/kg体质量)的抗抑郁剂文拉法辛,用反转录-聚合酶链反应检测大鼠海马区脑源性神经营养因子(BDNF)、转录因子环磷腺苷反应元件结合蛋白(CREB)及神经细胞黏附分子(NCAM)mRNA表达的变化.正常对照组、抑郁模型组、抑郁模型后注射生理盐水14 d组及28 d组各10只,抑郁模型后小剂量文拉法辛(5 mg/kg体质量)治疗14 d组及28 d组、抑郁模型后大剂量文拉法辛(10 mg/kg体质量)治疗14 d组及28 d组各11只.结果 抑郁模型大鼠体质量、蔗糖水消耗量及旷场实验结果均明显低于正常对照组,提示抑郁模型大鼠在第28天建立成功.慢性不可预见应激28 d后,抑郁模型大鼠海马区BDNF(0.18±0.09)、CREB(0.10±0.05)及NCAM(0.08±0.04)mRNA表达水平均明显低于正常组[吸光度比值分别为(0.41±0.12)、(0.26±0.05)及(0.24±0.08);P均<0.05 ].5 mg/kg体质量文拉法辛明显增加海马区3种可塑性相关蛋白mRNA的表达;10 mg/kg文拉法辛轻度降低海马区3种可塑性相关蛋白mRNA的表达.结论 文拉法辛在一定剂量范围内调节海马区的神经可塑性,BDNF、CREB及NCAM在抑郁症的病因及治疗中发挥重要作用.  相似文献   

4.
目的探讨氟西汀对癫痫合并抑郁大鼠海马齿状回自噬的影响。方法将60只SD大鼠随机分为对照组、模型组、氟西汀组、3-甲基腺嘌呤(3-MA)组。采用体重、摄食量、旷场试验评定大鼠抑郁水平;采用免疫组化测定大鼠海马齿状回beclin1、LC3-I、m ToR蛋白表达水平,荧光实时定量RT-PCR测定大鼠海马齿状回beclin1、LC3-I、m ToR基因表达水平。结果药物干预后,模型组体重、摄食量、垂直运动次数和水平运动次数明显低于对照组(P 0. 01);氟西汀组、3-MA组经药物治疗后以上指标高于模型组(P 0. 01,P 0. 05)。模型组海马齿状回beclin1、LC3-I表达显著升高,m ToR表达下降,与对照组相比有统计学意义(P 0. 01);氟西汀组、3-MA组大鼠海马齿状回beclin1、LC3-I表达下降,m ToR表达升高,与模型组相比差异有统计学意义(P 0. 01)。结论氟西汀可能通过改善癫痫合并抑郁大鼠海马齿状回区beclin1、LC3-I、m ToR表达,抑制细胞自噬。  相似文献   

5.
目的 探讨氟西汀对癫痫合并抑郁大鼠海马齿状回自噬的影响。方法 将60只SD大鼠随机分为对照组、模型组、氟西汀组、3-甲基腺嘌呤(3-MA)组。采用体重、摄食量、旷场试验评定大鼠抑郁水平;采用免疫组化测定大鼠海马齿状回beclin1、LC3-I、mToR蛋白表达水平,荧光实时定量RT-PCR测定大鼠海马齿状回beclin1、LC3-I、mToR基因表达水平。结果 药物干预后,模型组体重、摄食量、垂直运动次数和水平运动次数明显低于对照组(P<0.01);氟西汀组、3-MA组经药物治疗后以上指标高于模型组(P<0.01,P<0.05)。模型组海马齿状回beclin1、LC3-I表达显著升高,mToR表达下降,与对照组相比有统计学意义(P<0.01);氟西汀组、3-MA组大鼠海马齿状回beclin1、LC3-I表达下降,mToR表达升高,与模型组相比差异有统计学意义(P<0.01)。结论 氟西汀可能通过改善癫痫合并抑郁大鼠海马齿状回区beclin1、LC3-I、mToR表达,抑制细胞自噬。  相似文献   

6.
目的探究帕罗西汀与阿米替林联用对脑卒中后抑郁(post-stroke depression,PSD)大鼠额前皮质区与海马区的单胺类递质、脑源性神经营养因子(brain-derived neurotrophic factor,BDNF)水平的影响.方法SD大鼠被分为4组,即对照组、PSD组、帕罗西汀(Par)组和帕罗西汀+阿米替林(Par+Ami)组.通过"线栓法"和慢性不可预见性温和刺激建立PSD大鼠模型.Par组灌胃给予帕罗西汀1.8 mg·kg-1,Par+Ami组在Par基础上腹腔注射阿米替林10 mg·kg-1,干预3w.分别在干预前、PSD建模后和干预后检测大鼠体质量、停止游泳的时间和蔗糖偏爱度.在干预后分别通过酶联免疫吸附实验、qPCR和Western blot检测额叶皮质和海马体5-羟色胺(5-hydroxytryptamine,5-HT)、去甲肾上腺素(norepinephrine,NE)、多巴胺(dopamine,DA)以及BDNF mRNA和蛋白的水平.结果建模前各组大鼠体质量、行为学指标、皮质和海马体5-HT、NE、DA以及BDNF mRNA和蛋白的水平比较差异均无统计学意义(P>0.05).建模后大鼠的体质量和蔗糖偏爱度显著降低,停止游泳的时间显著升高(P<0.05).干预后PSD组大鼠的体质量、蔗糖偏爱度、质和海马体5-HT、NE、DA以及BDNF mRNA和蛋白的水平显著低于对照组,停止游泳的时间显著高于对照组(P<0.05).Par组和Par+Ami组的大鼠的体质量、蔗糖偏爱度、质和海马体5-HT、NE、DA以及BDNF mRNA和蛋白的水平显著高于PSD组,停止游泳的时间显著低于PSD组(P<0.05).并且Par+Ami组的大鼠的体质量、蔗糖偏爱度、质和海马体5-HT、NE、DA以及BDNF mRNA和蛋白的水平显著高于Par组,停止游泳的时间显著低于Par组(P<0.05).结论帕罗西汀联合阿米替林可更有效的提高皮质和海马体中5-HT等单胺类神经递质的水平,缓解PSD大鼠模型的抑郁程度,并且可促进BDNF的水平,改善神经功能,提高对PSD的疗效和预后.  相似文献   

7.
目的 探讨5-羟色胺1A(5-HT1A)受体激动剂8-OH-DPAT对左旋多巴诱发的运动并发症的细胞学与行为学效应.方法 通过6-羟基多巴胺立体定向注射至大鼠前脑内侧前脑束建立帕金森病(Parkinson disease,PD)动物模型.对模型成功的PD大鼠进行两套实验:第1套实验中3组PD大鼠接受每日2次左旋多巴甲酯(50 mg/kg加12.5 mg/kg苄丝肼)腹腔注射,持续22 d.在第23天左旋多巴注射前,3组PD大鼠先分别接受8-OH-DPAT、8-OH-DPAT+5-羟色胺1A(5-HT1A)受体阻断剂WAY-100635(0.1 mg/kg)及溶剂对照注射;第2套实验中2组PD大鼠每日2次分别接受左旋多巴/苄丝肼+8-OH-DPAT与左旋多巴/苄丝肼+溶剂,持续22 d.评估旋转时间、关期发生频率情况;采用蛋白印迹法检测纹状体区谷氨酸受体1(GluR1)亚细胞分布及GluR1的845位丝氨酸(GluR1Ser845)磷酸化的表达情况.结果 8-OH-DPAT逆转了左旋多巴所诱导的PD大鼠旋转时间的缩短,延长约27.8%±6.1%;并使关期发生频率减少约7.2%±1.7%.5-HT1A受体阻断剂WAY-100635与8-OH-DPAT联合应用则消除了8-OH-DPAT的效应,提示所观察到的8-OH-DPAT的效应是通过5-HT1A受体起作用的.此外,8-OH-DPAT能调节与运动并发症密切相关的GluR1的亚细胞分布,且使GluR1Ser845的磷酸化水平降低约22.1%±3.5%.结论 激动5-HT1A受体的药物可能是治疗及预防PD运动并发症有益的疗法.  相似文献   

8.
目的:探讨5-HT1A受体激动剂8-OH-DPAT对左旋多巴诱发的异动症细胞学与行为学效应。方法:6-羟基多巴胺立体定向注射至大鼠前脑内侧束建立帕金森病(PD)动物模型。对模型成功的PD大鼠进行两套实验:第1套实验中3组PD大鼠接受每日2次左旋多巴(50mg穔g-1加苄丝肼12.5mg穔g-1)腹腔注射,持续22d。在第23天左旋多巴注射前,3组PD大鼠先分别接受8-OH-DPAT、8-OH-DPAT 5-HT1A受体阻断剂WAY-1006350.1mg穔g-1及溶剂;第2套实验中2组PD大鼠每日2次分别接受左旋多巴/苄丝肼 8-OH-DPAT与左旋多巴/苄丝肼 溶剂,持续22d。评估剂峰旋转次数;采用蛋白印迹法检测纹状体区谷氨酸受体亚型GluR1亚细胞分布及GluR1Ser831磷酸化的表达情况。结果:8-OH-DPAT减轻了PD大鼠的剂峰旋转次数。5-HT1A受体阻断剂WAY-100635与8-OH-DPAT联合应用则消除了8-OH-DPAT的效应。此外,8-OH-DPAT能调节与异动症相关的GluR1的亚细胞分布且明显降低GluR1Ser831的磷酸化水平。结论:8-OH-DPAT是通过5-HT1A受体起作用的,激动5-HT1A受体的药物可能对于PD异动症治疗及预防有益。  相似文献   

9.
脑卒中后抑郁大鼠海马齿状回5-羟色胺1A受体的表达   总被引:2,自引:0,他引:2  
目的 观察脑卒中后抑郁(PSD)大鼠海马齿状回5-羟色胺1A(5-HT1A)受体的表达.方法 将SD雄性大鼠分为正常对照组、卒中组、应激抑郁对照组和PSD组,每组6只.应用左侧大脑中动脉阻塞(MCAO)联合不可预见的慢性温和应激(CMS)刺激及孤养法建立PSD大鼠模型,采用荧光实时定量聚合酶链反应和Western印迹法检测并比较各组大鼠CMS第19天和第28天齿状回5-HT1A受体(mRNA)和蛋白表达水平.结果 (1)CMS第19天,PSD组5-HT1A受体mRNA表达(O.012±0.001)低于正常对照组(0.361±0.010)和卒中组(0.039±0.002;P<0.001);其5-HT1A受体蛋白表达(0.400±0.030)低于正常组(1.320±0.060)和卒中组(0.610±0.060;均P<0.001).(2)CMS第28天,PSD组5-HT1A受体mRNA(0.013±0.001)低于正常对照组(0.336±0.011)、卒中组(0.063±0.006;均P<0.001);其5-HT1A受体蛋白表达(0.080±0.020)低于正常组(0.620 ±0.030)、卒中组(0.260±0.040)和应激抑郁组(0.320±0.020;均P<0.001).结论 PsD大鼠海马齿状回5-HT1A受体表达水平降低,此改变可能是PSD发病的分子机制之一.  相似文献   

10.
目的 观察酸枣仁汤对抑郁模型大鼠海马Wnt-1 基因和蛋白表达的影响。方法 制作慢 性轻度不可预见性应激抑郁大鼠模型,实验分成对照组、模型组、氟西汀组、酸枣仁汤低、中、高剂量 组,分别采用酸枣仁汤和氟西汀治疗抑郁模型大鼠,测定其体重、糖水消耗、旷场实验行为活动前后得 分变化情况,以及Western blot 和Real-time PCR 分别检测大鼠海马中Wnt-1 蛋白和基因的表达情况。结 果 抑郁模型大鼠体重增长速度减慢,糖水消耗和旷场实验行为活动得分减少,海马内Wnt-1 蛋白和基 因表达也减少;酸枣仁汤治疗后,大鼠体重增长明显,糖水消耗量明显增多,旷场实验行为活动得分也 增加明显,Wnt-1 蛋白和基因表达上调。结论 酸枣仁汤可增加大鼠抑郁模型海马Wnt-1 基因和蛋白的 表达,减少神经元细胞凋亡,具有抗抑郁作用。  相似文献   

11.
Background Dementia occurs in the majority of patients with Parkinson’s disease (PD). Late onset of PD has been reported to be associated with a higher risk for dementia. However, age at onset (AAO) and age at baseline assessment are often correlated. The aim of this study was to explore whether AAO of PD symptoms is a risk factor for dementia independent of the general effect of age. Methods Two community-based studies of PD in New York (n = 281) and Rogaland county, Norway (n = 227) and two population-based groups of healthy elderly from New York (n = 180) and Odense, Denmark (n = 2414) were followed prospectively for 3–4 years and assessed for dementia according to DSM-IIIR. All PD and control cases underwent neurological examination and were followed with neurological and neuropsychological assessments. We used Cox proportional hazards regression based on three different time scales to explore the effect of AAO of PD on risk of dementia, adjusting for age at baseline and other demographic and clinical variables. Findings In both PD groups and in the pooled analyses, there was a significant effect of age at baseline assessment on the time to develop dementia, but there was no effect of AAO independent of age itself. Consistent with these results, there was no increased relative effect of age on the time to develop dementia in PD cases compared with controls. Interpretation This study shows that it is the general effect of age, rather than AAO that is associated with incident dementia in subjects with PD. Received in revised form: 22 December 2005  相似文献   

12.
BONDY, S. C., M. E. HARRINGTON AND C. L. ANDERSON. Effects of prevention of afferentation on the developmentof the chick optic lobe. BRAIN RES. BULL. 3(5) 411–413, 1978.—The effects of unilateral extirpation of the right optic cup of the three-day incubated chick embryo upon the rate of synthesis and the stability of DNA in the non-innervated optic lobe, have been studied. This surgical procedure prevents innervation of the optic lobe contralateral to the removed eye, while the other optic lobe is normally innervated by retinal ganglion cells of the remaining eye. At the 20th day of incubation, the DNA content of the non-innervated lobe was below that of the paired lobe receiving normal innervation. This deficiency of cell number was caused by two events; death of an excess number of neurons formed early in embryogenesis and a reduced rate of glial proliferation in the later stages of incubation.  相似文献   

13.
2018年,国家卫生健康委员会等10部委联合发布《关于印发全国社会心理服务体系建设试点工作方案的通知》,四川省绵阳市被列为全国第一批试点地区。绵阳市人民政府依据《中华人民共和国精神卫生法》等相关法律法规和文件精神,结合前期调查研究和社会心理服务工作的试点实际,编制出台了《绵阳市社会心理服务工作管理办法》,并于2021年12月25日起施行。本文围绕社会心理服务的相关概念、办法总则、重点内容、保障措施等方面进行解读,以期为社会心理服务工作的规范、持续和有效开展提供参考。  相似文献   

14.
目的探讨腺垂体功能减退症患者的病因结构变化及临床表现。方法回顾性分析我院2013-01—2016-12住院及门诊78例腺垂体功能减退症患者的临床资料。结果男32例(41.03%),女46例(58.97%);诊断时年龄11~89岁,平均62.5岁;鞍区占位(包括术前及术后)52例(66.67%),席汉综合征8例(10.26%),空泡蝶鞍9例(11.65%),病因不明8例(10.26%),垂体-下丘脑发育不良1例(1.28%)。首次就诊科室:纳差厌食、恶心呕吐就诊于消化内科36例(46.15%)最常见。ACTH+TSH+Gn+G激素缺乏为19例最多,占24.36%,ACTH+TSH+Gn缺乏15例,占19.23%。结论腺垂体功能减退症病因结构发生变化,发病人群、首发症状及受累激素也不同,患者女性多于男性,发病年龄偏高,症状不典型,分布于临床多个科室,其中以低钠血症为首发临床表现就诊消化内科最多。  相似文献   

15.
《Clinical neurophysiology》2020,131(1):243-258
Standardization of Electromyography (EMG) instrumentation is of particular importance to ensure high quality recordings. This consensus report on “Standards of Instrumentation of EMG” is an update and extension of the earlier IFCN Guidelines published in 1999. First, a panel of experts in different fields from different geographical distributions was invited to submit a section on their particular interest and expertise. Then, the merged document was circulated for comments and edits until a consensus emerged.The first sections in this document cover technical aspects such as instrumentation, EMG hardware and software including amplifiers and filters, digital signal analysis and instrumentation settings. Other sections cover the topics such as temporary storage, trigger and delay line, averaging, electrode types, stimulation techniques for optimal and standardised EMG examinations, and the artefacts electromyographers may face and safety rules they should follow. Finally, storage of data and databases, report generators and external communication are summarized.  相似文献   

16.
目的分析帕金森病(PD)患者运动症状进展特点。方法采用PD统一评分量表(UPDRS)Ⅲ对912例PD患者进行评估。结果与病程1年的患者比较,除病程1~2年的患者外,其他病程患者的UPDRSⅢ评分、强直分、姿势或步态异常分、轴性症状总分、言语分、步态分显著升高(均P0.05),病程5~6年及14年患者的震颤分,病程5~6年、7~8年、9~13年、14年患者的运动迟缓分、姿势分显著升高(P0.05~0.01)。轴性症状进展速度高于UPDRSⅢ评分。结论 PD患者病程早期UPDRSⅢ评分进展快,震颤症状进展独立于其他症状,轴性症状评分较UPDRSⅢ更敏感地反映疾病加重趋势。  相似文献   

17.
18.
Summary The frequency of accumulation of 6-nm filaments in the adaxonal cytoplasm of Schwann cells in the 6th lumbar dorsal and ventral roots was evaluated in 4-, 8-, 26- and 45-week-old Sprague-Dawley rats. The frequency was higher in 4- and 8-week-old (growing) rats than in 26- and 45-week old (mature) rats, and also higher in ventral than in dorsal roots in 4-, 8- and 26-week old rats. There were no clusters on certain groups of myelinated fibers according to the size of transverse axonal area, in both the ventral and dorsal roots. Therefore, this accumulation may reflect certain functions of the adaxonal cytoplasm of Schwann cell during natural growth and maturation of the axon and myelin sheath.  相似文献   

19.
Introduction: An important consideration in treating acute mania is the promptness with which a chosen therapy can bring symptom amelioration. This article reviews the available published data from controlled, blinded studies regarding the latency of responses to antipsychotics in patients with acute mania.

Methods: Articles for this review were obtained from a search of the Medline database (1966–1999), using the following keywords and phrases: antipsychotic, atypical, bipolar disorder, mania, neuroleptic, typical. The bibliographic sections of articles gleaned from this search were used to direct further inquiries.

Results: Although information regarding the onset of action of antipsychotics is limited, we discovered data for four typical and three atypical antipsychotics. Drugs with the fastest onsets include haloperidol, risperidone, and olanzapine, with onsets appearing in 2–6 days. Chlorpromazine and thiothixene were at the slowest end of the continuum, with onsets of 2 weeks or longer. Data regarding pimozide are mixed, with some studies showing an onset equivalent to that of the 'fast' compounds and others showing one similar to that of the 'slow' compounds.

Conclusions: Choice of therapy should consider not only efficacy and safety, but also onset speed. Atypical antipsychotics appear to offer safer, faster, and more effective therapies.  相似文献   

20.
Nearly 400 years ago, Thomas Willis described the arterial ring at the base of the brain (the circle of Willis, CW) and recognized it as a compensatory system in the case of arterial occlusion. This theory is still accepted. We present several arguments that via negativa should discard the compensatory theory. (1) Current theory is anthropocentric; it ignores other species and their analog structures. (2) Arterial pathologies are diseases of old age, appearing after gene propagation. (3) According to the current theory, evolution has foresight. (4) Its commonness among animals indicates that it is probably a convergent evolutionary structure. (5) It was observed that communicating arteries are too small for effective blood flow, and (6) missing or hypoplastic in the majority of the population. We infer that CW, under physiologic conditions, serves as a passive pressure dissipating system; without considerable blood flow, pressure is transferred from the high to low pressure end, the latter being another arterial component of CW. Pressure gradient exists because pulse wave and blood flow arrive into the skull through different cerebral arteries asynchronously, due to arterial tree asymmetry. Therefore, CW and its communicating arteries protect cerebral artery and blood–brain barrier from hemodynamic stress.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号