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目的?基于慢性压力应激抑郁小鼠模型,考察不同配伍比例的开心散对皮层与海马神经营养因子调控的影响,探讨开心散治疗抑郁症的作用机制。方法?采用一系列慢性应激压力构建小鼠抑郁症模型,给予不同配伍比例的开心散,应用ELISA法分别检测小鼠大脑皮层与海马中神经生长因子NGF与脑源性神经营养因子BDNF含量,利用qPCR与Western blot技术检测皮层与海马神经营养因子受体TrkA、TrkB、TrkC的表达。结果?不同配伍比例的开心散均能提升抑郁小鼠的糖水饮用量,延长强迫游泳时间,表现出显著的抗抑郁作用,其中以D-652配伍比例效用最佳。同时提升NGF、BDNF含量与相关受体的表达。结论?开心散调控神经营养因子系统是其抗抑郁的重要作用机制。 相似文献
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目的 研究睡眠剥夺对抑郁样模型大鼠探索行为的影响,并从脑源性神经营养因子(BDNF)的角度探讨其机制.方法 30只SD大鼠随机分为正常组、抑郁组和剥夺组,慢性不可预知性刺激法制备抑郁样模型;在第6,12,18,24天运用多平台水环境法对剥夺组进行连续24h的全睡眠剥夺,剥夺干预后随即对各组大鼠进行敞箱实验;免疫组织化学和逆转录聚合链式反应法测海马神经元BDNF表达水平.结果 第6,12,18,24天四次行为测试得分显示,剥夺组大鼠的探索行为得分呈现先降低后升高趋势,第24天探索行为得分与抑郁组比较差异有统计学意义(P<0.01),而与正常组比较差异无统计学意义(P>0.05).免疫组化结果显示,与抑郁组[积分光密度:108.53±4.45,阳性面积比:0.0747±0.0262]相比,剥夺组[积分光密度:116.00 ±5.61,阳性面积比:0.2034±0.0352]大鼠海马神经元BDNF蛋白表达明显增高(P<0.05),而与正常组[积分光密度:117.27±10.66,阳性面积比:0.2252±0.1143]相比差异无统计学意义(P>0.05).RT-PCR结果和免疫组化结果相符.结论 睡眠剥夺能改善抑郁模型大鼠的探索行为能力,其机制可能与提高海马组织BDNF的含量有关. 相似文献
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目的研究慢性不可预见性应激和孤养结合对大鼠外显行为及海马各亚区结构和BDNF表达的影响.方法应激组经过21d慢性应激后,观察所有大鼠行为学改变,用ABC法检测海马各亚区的BDNF表达.结果慢性应激后,应激组大鼠出现同抑郁症患者相似的行为改变;正常组大鼠BDNF在DG区(光密度为40.53±2.62,阳性面积比为2.013±0.074)和CA3区(光密度为39.09±3.19,阳性面积比为1.910±0.056)表达明显;海马各亚区BDNF同对照组相比明显下降(P<0.01).结论慢性不可预见性应激同孤养结合可建立较稳定的抑郁症模型;慢性应激可以使海马亚区BDNF表达下降;DG区和BDNF在海马可塑性上起到重要作用. 相似文献
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慢性应激对大鼠外显行为及海马亚区脑源性神经营养因子表达差异性的影响 总被引:8,自引:3,他引:5
目的研究慢性不可预见性应激和孤养结合对大鼠外显行为及海马各亚区结构和BDNF表达的影响。方法应激组经过 2 1d慢性应激后 ,观察所有大鼠行为学改变 ,用ABC法检测海马各亚区的BDNF表达。结果慢性应激后 ,应激组大鼠出现同抑郁症患者相似的行为改变 ;正常组大鼠BDNF在DG区 (光密度为 40 .5 3± 2 .62 ,阳性面积比为 2 .0 13± 0 .0 74)和CA3区 (光密度为 3 9.0 9± 3 .19,阳性面积比为 1.910± 0 .0 5 6)表达明显 ;海马各亚区BDNF同对照组相比明显下降 (P <0 .0 1)。结论慢性不可预见性应激同孤养结合可建立较稳定的抑郁症模型 ;慢性应激可以使海马亚区BDNF表达下降 ;DG区和BDNF在海马可塑性上起到重要作用。 相似文献
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目的探讨芒果苷(Mangiterin)对慢性应激抑郁模型(chronicunpredictablestress,CUS)小鼠行为学的改善作用及对海马脑源性神经营养因子(brain—derivedneurotrophicfactor,BDNF)表达的影响。方法将大鼠随机分为正常对照组,慢性应激模型组,氟西汀组,芒果苷低、中和高剂量组,共6组,每组10只。采用慢性轻度不可预见性应激配合孤养复制抑郁模型,通过旷场及悬尾实验观察行为学改变,并运用免疫印迹检测海马BDNF的表达。结果与正常对照组比,模型组体质量增长缓慢[(5.33±1.20)g],水平穿格次数减少[(102±18)~/5min],活动距离缩短[(3425±112)mm],悬尾不动时间延长,行为学明显处于抑郁状态,同时降低海马BDNF的表达(0.45±0.03),差异有统计学意义(P〈0.01);而中药芒果苷组较模型组可显著改善行为学指标,体质量增长较快,升高海马BDNF的表达,差异有统计学意义(P〈0.01)。芒果苷高剂量组与氟西汀组比较,差异无统计学意义泸〉0.05)。结论芒果苷能够改善慢性应激抑郁模型小鼠的抑郁行为,可能与其上调海马BDNF的表达有关。 相似文献
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目的:探讨小鼠卵巢切除后的不同时期脑源性神经营养因子(BDNF)在海马表达的变化。方法:用免疫组织化学染色结合图像分析检测BDNF在小鼠卵巢切除后海马CA各区与齿状回的表达。结果:在小鼠卵巢切除后4d BDNF的表达明显下降,14d BDNF的表达开始恢复,28d BDNF在海马的表达基本恢复到正常水平。结论:雌激素水平的下降在早期可减弱BDNF在小鼠海马的表达。 相似文献
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《新乡医学院学报》2019,(3):218-223
目的探讨急性心肌梗死(AMI)大鼠探索行为和海马神经元中脑源性神经营养因子(BDNF)表达的变化。方法将25只健康雄性Sprague Dawley大鼠依据分层抽样法分为对照组(n=5)和AMI组(n=20)。AMI组大鼠采用心脏左冠状动脉前降支结扎术制作AMI模型,对照组大鼠不做任何处理。采用旷场实验观察各组大鼠AMI前及AMI后3、7、10、14 d探索行为的变化,苏木精-伊红(HE)染色检测2组大鼠心肌组织变化;免疫组织化学染色法和Western blot法检测2组大鼠海马神经元中BDNF蛋白表达;实时荧光定量聚合酶链反应检测2组大鼠海马神经元中BDNF mRNA表达。结果旷场实验结果显示,AMI前2组大鼠潜伏期、水平运动次数、垂直运动次数比较差异无统计学意义(P> 0. 05); AMI后3、7、10、14 d,AMI组大鼠潜伏期长于对照组,水平运动次数、垂直运动次数少于对照组(P <0. 05)。HE染色结果显示,AMI组大鼠心肌组织梗死区及梗死边缘区的心肌细胞出现核固缩现象,且有炎细胞浸润;对照组大鼠心肌细胞呈粉红色。免疫组织化学染色和Western blot检测结果均显示,AMI后7、14 d,AMI组大鼠海马神经元中BDNF蛋白表达量低于对照组(P <0. 05); AMI组大鼠AMI后14 d海马神经元中BDNF蛋白表达量低于AMI后7 d (P <0. 05)。AMI后7、14 d,AMI组大鼠海马神经元中BDNF mRNA相对表达量低于对照组(P <0. 05); AMI后14 d,AMI组大鼠海马神经元中BDNF mRNA相对表达量低于AMI后7 d (P <0. 05)。结论大鼠AMI后伴发抑郁样行为,其机制可能与海马神经元中BDNF表达显著降低有关。 相似文献
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目的:观察大鼠脑缺血再灌流损伤后脑源性神经营养因子(BDNF)和睫状神经营养因子(CNTF)mRNA在海马中的分布及其表达。方法:大鼠颈总动脉夹闭造成脑缺血30min,于6,12,24,72h进行点杂交和原位杂交,72h时进行神经元尼氏小体染色。结果:脑缺血后,海马CAI区神经元大量死亡,BDNFmRNA表达于6h开始增加,72h恢复正常。24h时齿状回BDNFmRNA和CNTFmRNA的表达均增 相似文献
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目的:观察大鼠脑缺血再灌流损伤后脑源性神经营养因子(BDNF)和睫状神经营养因子(CNTF)mRNA在海马中的分布及其表达。方法:大鼠颈总动脉夹闭造成脑缺血30min,于6,12,24,72h进行点杂交和原位杂交,72h时进行神经元尼氏小体染色。结果:脑缺血后,海马CA1区神经元大量死亡,BDNFmRNA表达于6h开始增加,72h恢复正常。24h时齿状回BDNFmRNA表达高于CA1区。CNTFmRNA表达于12h开始持续增加。结论:脑缺血再灌流损伤后,海马BDNFmR-NA和CNTFmRNA的表达均增加。BDNF可能有利于齿状回神经元耐受缺血,CNTF可能在局部发挥神经营养作用 相似文献
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目的:观察丁苯酞(NBP)对血管性痴呆(VD)大鼠海马CA1区脑源性神经营养因子(BDNF)表达的影响,探讨丁苯酞对VD的保护作用。方法:将80只健康Wistar大鼠按随机区组法分为假手术组、NBP对照组(假手术+NBP注射剂)、VD组(VD模型)和NBP处理组(VD模型+NBP注射剂),每组20只,每组又分为4个亚组,即术后1、2、4和8周组,每个亚组5只。永久性双侧颈总动脉结扎法制备VD大鼠模型。NBP对照组和NBP处理组大鼠腹腔注射NBP注射剂5 mg·kg-1·d-1,连续给药7 d。假手术组和VD组大鼠每次腹腔注射4 mL生理盐水,连续注射7 d。各组大鼠在术后各时间点(1、2、4和8周)留取海马组织,应用实时定量PCR和免疫组织化学法检测各组大鼠海马CA1区BDNF表达水平。结果:定时定量PCR法,术后2、4和8周,VD组大鼠海马BDNF mRNA表达水平明显高于假手术组(P < 0.05),术后4和8周,NBP处理组大鼠海马BDNFmRNA表达水平明显高于VD组(P < 0.05);免疫组织化学法,VD组大鼠4周时BDNF表达水平明显高于假手术组(P < 0.05),术后8周时NBP组大鼠CA1区BDNF蛋白表达水平明显高于VD组(P < 0.05)。结论:VD模型大鼠海马CA1区神经元在遭受缺血损伤后,BDNF反应性表达增加,而NBP则可明显提高VD大鼠海马CA1区BDNF的表达,发挥神经保护作用。 相似文献
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目的:研究新型抗抑郁药沃替西汀对环磷酸腺苷/环磷酸腺苷反应元件结合蛋白/脑源性神经营养因子(cAMP/CREB/BDNF)信号转导通路的影响。方法将昆明小鼠随机分为对照组和慢性不可预知性温和应激(CUMS)造模组进行造模,采用糖水偏爱试验考察模型是否成功建立。造模结束后将CUMS组小鼠随机分为模型组、氟西汀组和沃替西汀组。采用悬尾试验、强迫游泳试验和旷场试验,考察沃替西汀对抑郁小鼠的抗抑郁作用。采用ELISA试剂盒检测小鼠海马组织中cAMP的含量。采用蛋白免疫印迹法检测小鼠海马组织中磷酸化CREB(pCREB)和BDNF的蛋白表达。结果沃替西汀显著缩短小鼠在悬尾和强迫游泳试验中的不动时间(P<0.01),而对其在旷场试验中的自主活动行为没有影响(P>0.05),表明沃替西汀可改善抑郁小鼠的抑郁样行为;ELISA结果显示沃替西汀能显著增加小鼠海马组织内cAMP的含量(P<0.01);蛋白免疫印迹结果表明沃替西汀可以促进pCREB和BDNF的蛋白表达(P<0.01)。结论沃替西汀产生抗抑郁作用机制可能与影响cAMP/CREB/BDNF信号转导通路有关。 相似文献
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proBDNF对培养的海马神经元存活的影响及其机制 总被引:4,自引:0,他引:4
目的:初步探讨proBDNF(precursor of brain-derived neurotrophic factor)对海马神经元的可能作用及其机制.方法:采用体外培养胚鼠海马神经元,并给予proBDNF,preBDNF(propeptide of proBDNF)和抗proBDNF血清处理;30 min,1 h和48 h后行尼氏染色,ELK-p(Ets domain protein),ErK2(extracellular signal regulated kinase)和c-fos免疫细胞化学染色.结果:给予proBDNF处理后,可见培养细胞内ELK-p,ErK2和c-fos表达明显上调,部分细胞核深染;而用抗血清中和内源性proBDNF后,ELK-p、ErK2和c-fos均下调,且细胞出现肿胀、空泡样变化.preBDNF处理组细胞与正常对照组类似.结论:proBDNF可维持海马神经元的存活,其机制可能与激活ErK和ELK信号通路有关. 相似文献
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目的:观察电针对抑郁模型大鼠5-羟色胺(5-HT)、脑源性神经营养因子(BDNF)表达水平的影响,探讨电针改善大脑功能可能存在的机制.方法:采用慢性应激抑郁模型,将大鼠分为空白对照组、抑郁模型组、阳性西药组、电针治疗组(以电针刺激百会、印堂穴);Elisa法检测各组大鼠海马内5-HT含量、Western-blot法检测海马内BDNF蛋白表达水平.结果:给予慢性应激刺激后,模型组大鼠海马5-HT含量较正常组显著减少(P<0.01),电针组大鼠海马5-HT含量较模型组显著增加(P<0.01).Western-blot印迹结果显示与正常组相比,模型组BDNF蛋白表达量显著降低(P<0.01);电针组BDNF蛋白表达量较模型组显著增加(P<0.01).结论:提高海马内5-HT含量及BDNF表达,增强神经可塑性是电针抗抑郁可能的机制. 相似文献
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目的:研究糖尿病对血管性痴呆大鼠海马CA1区神经元脑源性神经营养因子(BDNF)的影响.方法:STZ诱导产生慢性实验性糖尿病,1 wk后行双侧颈总动脉永久性结扎制作糖尿病血管性痴呆大鼠模型,采用免疫组织化学方法和RT-PCR方法分别检测大鼠海马BDNF和BDNF mRNA水平的变化.结果:手术2 wk后,假手术组大鼠海马CA1区BDNF免疫反应阳性信号面积密度(%)为21.32±1.38,糖尿病组、血管性痴呆组和糖尿病血管性痴呆组BDNF水平均有下降,分别为15.12±1.41,17.32±1.11和9.62±0.87,其中糖尿病血管性痴呆组与单纯血管性痴呆组之间存在显著差异(P<0.01).手术后4 wk和8 wk时,这种差异更为显著.在各个时间点上,糖尿病血管性痴呆组大鼠海马CA1区BDNF mRNA的相对表达量均少于单纯血管性痴呆组(P<0.05).结论:糖尿病加重血管性痴呆大鼠认知功能障碍至少部分是由于BDNF的缺乏引起的. 相似文献
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氟西汀对卒中后抑郁模型大鼠海马BDNF mRNA表达的影响 总被引:1,自引:0,他引:1
目的 探讨抗抑郁剂氟西汀对卒中后抑郁( post-stroke depression,PSD)模型大鼠海马脑源性神经营养因子(brain-derived neurotrophic factor,BDNF)表达水平的影响.方法 大脑中动脉新线栓法建立局灶脑缺血模型;加以慢性不可预知温和应激结合孤养法建立PSD大鼠模型,... 相似文献
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To investigate the in vitro and in vivo proangiogenic effects of brain-derived neurotrophic factor (BDNF), human umbilical vein endothelial cells (HUVECs) were isolated and cultured in primary culture. The effect of BDNF on the proliferation of HUVECs was examined by MTT assay. The effects of BDNF on HUVEC migration and tube formation were studied by modified Boyden cham- ber assay and tube formation assay, respectively. Matrigel plug assay and chorioallantoic membrane assay were used to evaluate the effects of BDNF on angiogenesis in vivo. Our results showed that BDNF substantially stimulated the migration and tube formation of HUVECs in vitro, although it did not induce HUVEC proliferation. BDNF also induced angiogenesis both in matrigel plug of mouse model and in chick chorioallantoic membrane. In conclusion, BDNF can promote angiogenesis both in vitro and in vivo, and may be a proangiogenic factor. 相似文献
18.
目的:观察快速眼球转动期睡眠剥夺(RSD)及恢复睡眠(RS)对大鼠海马脑源性神经营养因子(BDNF)表达及学习、记忆能力的影响.方法:大鼠分为空白对照组、环境对照组、RSD 1 d组、RSD 3 d组、RSD 5 d组、RSD 7 d组以及RSD 7 d后RS6 h、RS 12 h组,每组12只;RSD大鼠模型采用改良多平台法建立.Y-型迷宫试验评定各组大鼠学习、记忆能力;实时定量RT-PCR及免疫组化方法检测各组大鼠海马区BDNF mRNA及蛋白表达水平.结果:Y-型迷宫评定结果表明RSD各组以及RS 6 h、12 h组错误反应次数明显高于空白对照组和环境对照组(P<0.05);与空白对照组相比,RSD 1 d、3 d大鼠总反应时间降低(P<0.05),RSD 7 d组明显增加(P<0.05).与空白对照组相比,RSD 1 d组大鼠海马BDNF mRNA表达明显上升(P<0.05),RSD 3 d组达到高峰(P<0.01).RSD 1 d、3 d组海马CA1、CA3、齿状回区以及RSD 5 d、RS 6 h组齿状回区BDNF蛋白表达显著高于空白对照组(P<0.05).结论:睡眠剥夺会导致机体学习、记忆能力下降,RS后可部分改善;机体可能会通过促进BDNF表达来代偿相对较短时间的睡眠剥夺,保护自身的认知能力,然而随着剥夺时间的延长,这种代偿机制也会被打破. 相似文献
19.
目的:检测脑源性神经营养因子(BDNF)靶向药物对阿耳茨海默病(AD)转基因鼠的治疗作用。方法:将BDNF与抗胰岛素受体单克隆抗体(2984)相结合,制备嵌舍肽BDNF-PEG-2984/SA。药物静脉注入AD转基因鼠tg2576体内。应用ELISA方法检测AD转基因鼠脑内BDNF的粥样蛋白(At3)的含量。结果:AD鼠脑内的BDNF浓度较高和平稳。可以有效降低AD转基因鼠脑内AB含量。结论:BDNF-PEG-2984/SA可以通过主动转运进入血脑屏障,对AD转基因鼠有治疗作用。 相似文献
20.
Effects of delayed brain-derived neurotrophic factor application on cochlear pathology and auditory physiology in rats 总被引:1,自引:0,他引:1
Background The development and maintenance of spiral ganglion cells (SGCs) appear to be supported by neurotrophins Removal of this support leads to their gradual degeneration. Intracochlear infusion with neurotrophins can provide trophic support to SGCs in animal deafness models if given shortly after deafening. However, it is not known whether delayed intervention will provide similar protection, which might be clinically relevant. The present research was conducted to determine the effects of brain-derived neurotrophic factor (BDNF) administration on the capacity of the peripheral processes to resprout.
Methods The left cochlea of 20 profoundly deafened rats, which were divided into 2 groups equally, was implanted with an electrode and drug-delivery system 30 days after deafening. Either BDNF or artificial perilymph (AP) was delivered continuously for 28 days. Electrically evoked auditory brainstem responses (EABRs) were recorded during the period. SGC body and peripheral process density were measured.
Results The EABR thresholds of AP increase continually. Those of BDNF increase slowly at the beginning then decrease, and were significantly less than those of the AP group from day 14 to 28 (P 〈0.01). In terms of SGC and peripheral process density, the difference between the treated and control ears of BDNF group was clearly significant (P 〈0.01), but not in AP group (P 〉0.05). Analysis of the left cochlea between the two groups demonstrated that SGC/peripheral process density of the BDNF group was significantly greater than that of the AP group. Finally, a functional formula was developed relating the last EABR threshold and SGC density and process density, which was as follows: T= 466.184-2.71 (F.B.L).
Conclusions Under the conditions of delayed intervention following 30 days after deafening in rats, it can be concluded that BDNF enhances SGC bodies and peripheral processes survival after differentiation and so improves auditory sensitivity. SGC peripheral processe 相似文献
Methods The left cochlea of 20 profoundly deafened rats, which were divided into 2 groups equally, was implanted with an electrode and drug-delivery system 30 days after deafening. Either BDNF or artificial perilymph (AP) was delivered continuously for 28 days. Electrically evoked auditory brainstem responses (EABRs) were recorded during the period. SGC body and peripheral process density were measured.
Results The EABR thresholds of AP increase continually. Those of BDNF increase slowly at the beginning then decrease, and were significantly less than those of the AP group from day 14 to 28 (P 〈0.01). In terms of SGC and peripheral process density, the difference between the treated and control ears of BDNF group was clearly significant (P 〈0.01), but not in AP group (P 〉0.05). Analysis of the left cochlea between the two groups demonstrated that SGC/peripheral process density of the BDNF group was significantly greater than that of the AP group. Finally, a functional formula was developed relating the last EABR threshold and SGC density and process density, which was as follows: T= 466.184-2.71 (F.B.L).
Conclusions Under the conditions of delayed intervention following 30 days after deafening in rats, it can be concluded that BDNF enhances SGC bodies and peripheral processes survival after differentiation and so improves auditory sensitivity. SGC peripheral processe 相似文献