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1.
 目的 观察白藜芦醇(Res)对脂多糖(LPS)所致大鼠黑质多巴胺能(DA)神经元损伤的保护作用。方法 黑质内注射LPS制作帕金森病(PD)大鼠模型。应用Res对实验动物进行处理。通过行为学、酪氨酸羟化酶(TH)、核因子κB(NF-κB)等免疫组化及免疫印迹技术观察Res对DA能神经元损伤的作用。结果 对照组大鼠无行为学变化,PD组大鼠平均旋转圈数为(196.90±9.52)圈,Res组为(106.57±7.89)圈,差异有统计学意义(P<0.01)。TH免疫组化结果表明,对照组大鼠黑质TH阳性神经元数量较多,胞体较大,突起明显;PD组神经元数量明显减少(P<0.01),甚至消失,神经元胞体萎缩,突起亦不清晰。Res组TH阳性神经元数量与PD组相比明显增加(P<0.01),神经元形态变化亦不明显。NF-κB免疫组化结果表明,对照组黑质仅见少数NF-κB阳性细胞,无明显核转位现象;PD组黑质NF-κB阳性细胞较多,胞质呈黄褐色,部分细胞核也着色,有明显核转位现象;与PD组相比,Res组NF-κB阳性细胞数明显减少(P<0.01)。小胶质细胞特异性抗体(OX-42)免疫组化结果表明,对照组大鼠黑质小胶质细胞多呈静止的“分枝样”状态,PD组多为激活状态,呈典型的“阿米巴样”;Res组激活状态的小胶质细胞与PD组相比明显减少,形态介于静止和激活状态之间。Western blot分析结果显示,与对照组相比,PD组TH蛋白表达减少,NF-κB P65蛋白表达明显增高(P<0.01);与PD组相比,Res组TH蛋白表达增加,NF-κB P65蛋白表达显著下降(P<0.01)。结论 Res可对LPS所致黑质DA能神经元损伤起防护作用,具有抗炎及神经保护作用。  相似文献   

2.
目的 观察塞来昔布(CB)对脂多糖(LPS)所致大鼠黑质多巴胺能(DA)神经元损伤的保护作用.方法 黑质内注射LPS制作帕金森病(PD)大鼠模型.应用CB对实验动物进行处理.采用行为学、酪氨酸羟化酶(TH)、环氧化酶-2(COX-2)等免疫组化及免疫印迹技术观察CB的神经保护作用.结果 对照组大鼠无行为变化,PD组大鼠平均旋转圈数为196.90±9.52,CB组为109.30±9.38,差异非常显著(P<0.01).TH免疫组化表明,对照组TH阳性神经元数量较多,胞体较大,突起明显;PD组神经元数量明显减少或消失(P<0.01),神经元胞体萎缩,突起不清晰;CB组TH阳性神经元数与PD组相比明显增加(P<0.01),神经元形态变化亦不明显.COX-2免疫组化表明,对照纽黑质偶见COX-2阳性细胞,PD组见大量COX-2阳性细胞;CB组COX-2阳性细胞数与PD组相比明显减少(P<0.01).小胶质细胞特异性抗体(OX-42)免疫组化表明,对照组小胶质细胞多呈静止的"分枝样"状态;PD组多为激活状态,呈典型的"阿米巴样";CB组激活状态的小胶质细胞与PD组相比明显减少,形态为高度分枝状态.Western blotting分析结果相同.结论 CB可防护LPS所致黑质DA能神经元损伤,具有神经保护作用.  相似文献   

3.
目的应用ESWAN序列测量正常大鼠和帕金森病(PD)模型大鼠脑黑质R2*值,探讨R2*值与多巴胺能神经元标志酶酪氨酸羟化酶(TH)阳性面积的相关性。方法将60只雄性SD大鼠,随机抽取20只为对照组,剩余40只大鼠通过向左侧黑质输注6-羟基多巴胺(6-OHDA)诱导PD模型,于造模后第15天进行旋转实验以验证模型,最终造模成功23只,作为模型组;期间每隔10d对两组大鼠的一般情况进行观察,第45天对两组大鼠进行旋转实验、MRI测量黑质R2*值及TH免疫组化染色。结果模型组大鼠损伤侧黑质R2*值较对照组显著升高(P<0.05);模型组大鼠损伤侧多巴胺能神经元TH的表达较对照组减低,差异有统计学意义(P<0.01);模型组、对照组大鼠黑质R2*值与TH阳性面积之间呈负相关。结论ESWAN序列可以成功测量PD大鼠黑质R2*值,对早期评价PD黑质多巴胺能神经元损伤情况有指导作用。  相似文献   

4.
目的探询“双固一通”针法对帕金森病模型大鼠黑质多巴胺能神经元的保护作用。方法将Wistar大鼠40只,随机分为正常对照组、假手术对照组、模型组、双固一通组等4组,每组10只。采用6-OHDA单侧纹状体立体定向微量注射法制备大鼠旋转帕金森病模型。双固一通组在造模成功后取关元、足三里、风府、太冲四穴行电针治疗2周。然后,取各组动物中脑,采用流式细胞技术检测各组大鼠黑质多巴胺能神经元教量和细胞凋亡率。结果双固一通组毁损侧黑质TH阳性细胞百分比显著高于模型组(P〈0.01),黑质细胞凋亡率显著低于模型组(P〈0.01)。结论双固一通针法能提高帕金森病模型大鼠黑质多巴胺能神经元教量,降低凋亡率。对多巴胺能神经元具有明显保护作用。  相似文献   

5.
安冉  刘卿卿  李国忠 《四川医学》2019,40(3):237-240
目的 利用大鼠同种异体嗅鞘细胞移植的方式对帕金森病模型大鼠进行治疗,初步探究在PD模型大鼠脑内移植嗅鞘细胞能否成为治疗帕金森病的一种有效手段。方法 提取和培养原代OECs,利用6-OHDA两点注射法建立帕金森病动物模型,通过APO诱导方式验证模型及检测治疗效果,通过HE染色进行大鼠黑质细胞形态学观察,利用抗TH荧光染色细胞计数对比治疗前后TH阳性神经元表达情况差异。结果 从嗅鞘细胞移植后的第4周开始,PD模型的行为学诱导旋转圈数明显减少。HE染色结果示:PD模型大鼠毁损侧的黑质致密部的神经元变性明显,且TH阳性神经元数量降低,经OECs治疗后的帕金森大鼠的患侧黑质部位神经元变性改善,且TH阳性神经元含量明显增高。结论 嗅鞘细胞能够改善帕金森模型大鼠的行为学变化。嗅鞘细胞能够提高帕金森模型大鼠患侧黑质部位多巴胺神经元含量。  相似文献   

6.
目的 探讨成功建立帕金森病(Parkinson's disease,PD)大鼠模型的快速有效方法.方法 将Wistar大鼠92只,随机分为实验组(80只)及对照组(12只),采用脑立体定向术,实验组在大鼠右侧中脑腹侧被盖区(ventral tegmental area,VTA)注入6-OHDA,经阿朴吗啡(Apomorphine,APO)诱导表现为恒定左侧旋转且旋转圈数﹥210 r/30 min的视为成功PD大鼠模型,对照组则在脑部相应位置注入生理盐水.免疫组化法观察成功模型毁损侧黑质酪氨酸羟化酶(TH)阳性神经元的形态及数量变化.结果 (1)行为学检测:模型组与对照组手术后分别死亡2只及1只,实验组78只大鼠中36只左侧恒定旋转圈数﹥210 r/30 min,造模成功率为46.2%,并且维持时间长.(2)免疫组化:成功大鼠模型毁损侧黑质区TH阳性的神经元较对侧及对照组明显减少(P&lt;0.01).结论 大鼠中脑VTA单点注射6-OHDA制作PD大鼠模型,易于定位,操作简单,动物死亡率低,模型成功率较高,成本较低,是较快建立稳定PD大鼠模型的可行方法.  相似文献   

7.
邢海霞  马晓君  王晓萃  付文玉 《浙江实用医学》2011,16(4):242-244,256,313
目的研究大鼠骨髓间充质干细胞(MSCs)体外培养后移植治疗帕金森病(PD)大鼠的作用及机制。方法采用全骨髓贴壁培养法分离、体外培养大鼠骨髓MSCs,采用免疫细胞化学法鉴定第3代MSCs,将第3代MSCs作为移植实验组,磷酸盐缓冲液(PBS)作为对照组,分别注射到6-OHDA制备的PD大鼠模型损毁侧纹状体内,观察移植术后PD大鼠不同时间段的行为变化,并检测PD大鼠黑质酪氨酸羟化酶(TH)的表达变化。结果骨髓MSCs定向移植术后,PD大鼠旋转行为从移植前的(11.08±2.47)r/min,降到移植后4周(3.75±0.96)r/min,移植后1周,2周,4周分别较移植前和对照组行为明显改善(P〈0.05),注射PBS后,大鼠在1周,2周,4周旋转行为无明显改善,MSCs移植术后2周黑质TH阳性细胞表达较PBS对照组明显增多(P〈0.05)。结论骨髓间充质干细胞移植后可能影响黑质多巴胺功能的神经元的改变,有助于改善PD大鼠的旋转行为。  相似文献   

8.
目的 利用大鼠脑室内注射低剂量脂多糖(lipopolysaccharide,LPS)(10μg)诱导全脑炎症,长时间观察大鼠行为学、黑质部位小胶质细胞激活及多巴胺(Dopamine,DA)能神经元的变化,研究小胶质细胞激活与DA能神经元损害的关系,探讨炎症在帕金森病(Parkinson's disease,PD)发病机制中的作用.方法 50只雄性SD大鼠分为生理盐水对照组和10 μg LPS组.大鼠右侧脑室内注射生理盐水或10 μgLPS,术后不同时间观察大鼠行为学改变,免疫组化方法观察大鼠黑质部位小胶质细胞激活情况及酪氨酸羟化酶( tyrosine hydroxylase,TH)阳性神经元的变化.Fluoro-Jade B(FJB)染色检测大鼠黑质部位神经元变性情况.结果 ①注射后4周至36周两组大鼠平均运动速度相近.注射后40周时10μg LPS组大鼠平均运动速度比生理盐水对照组降低24.6% (P>0.05).②注射后24周和40周,10 μg LPS组大鼠黑质部位可见明显激活的OX-42阳性小胶质细胞,生理盐水对照组未见明显激活的OX-42阳性小胶质细胞.两组大鼠黑质部位均未发现OX-6阳性小胶质细胞.③注射后24周和40周,10 μg LPS组大鼠黑质部位TH阳性神经元数目比生理盐水对照组分别减少了24.2% (t=4.803,P<0.01)和27.6% (t=3.212,P<0.01).④两组大鼠黑质部均未见FJB阳性染色神经元.结论 低剂量LPS脑室内注射可造成大鼠黑质部位小胶质细胞长期慢性激活及DA能神经元慢性损害.LPS诱导的全脑炎症在短时间内不会引起黑质DA能神经元变性坏死.脑室内注射10μg LPS模型能很好模拟DA能神经元慢性变性的特点,是研究PD的较好模型.  相似文献   

9.
目的:观察雌激素对去卵巢大鼠中脑黑质多巴胺能神经元的作用,探讨雌激素对帕金森病防治的可能性.方法:对成年雌性大鼠行卵巢切除术,应用立体定向技术注射6-羟基多巴胺(6-OHDA)于大鼠中脑黑质,采用免疫组织化学的方法对黑质TH(酷氨羟化酶)阳性神经元进行标记、记数;同时,对大鼠的行为学进行观测.结果:在没有给予雌激素的卵巢大鼠组,阿朴吗啡(APO) 诱导的旋转次数与其他对照组相比有显著性差异(P<0.05),大鼠中脑黑质TH阳性神经元的数目与其他对照组比较也有显著性差异(P<0.05).结论:雌激素对雌性大鼠中脑黑质多巴胺能神经元具有保护作用,除了经过雌激素受体途径以外,还有其他的作用机制.  相似文献   

10.
目的研究氯化锂(LiCl)对KM小鼠中脑黑质受损伤的多巴胺(DA)能神经元的保护作用。方法利用1-甲基4-苯基1,2.3,6四氢吡啶(MPTP)腹腔注射构建帕金森病(PD)动物模型,将实验动物分为MPTP组、NS组(生理盐水组)、LiCl组、PBS组(磷酸盐生理盐水缓冲液组)。模型动物存活1周后,一部分取其中脑黑质节段,固定、包埋做连续冠状石蜡切片,以免疫组织化学染色方法,显示各组酪氨酸羟化酶(TH)和钙结合蛋白(CB)表达阳性细胞,光镜观察并细胞计数,统计学分析;另一部分取其中脑黑质组织匀浆,行TH、CB的Western blot免疫印迹方法检测.用LabWorks软件分析处理。结果免疫组织化学染色结果显示LiCl组、NS组小鼠黑质致密部TH与CB阳性神经元数量分别显著多于PBS组(P〈0.01)、MPTP组(P〈0.01);Western blot免疫印迹结果显示LiCl组TH、CB表达水平显著高于PBS组(P〈0.05)。结论LiCl对成年PD小鼠黑质DA能神经元具有保护作用,且这种保护作用可能与细胞内CB表达增加有关。  相似文献   

11.
Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P< 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P< 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.  相似文献   

12.
Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.  相似文献   

13.
Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.  相似文献   

14.
A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care(~'4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.  相似文献   

15.
Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.  相似文献   

16.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

17.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

18.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

19.
Objective To measure Derpl and Blot5 allergen levels in asthmatics' homes in Hongkong.Methods Seventy houses were enrolled for a mite indoor environment study. Dust samples were obtained from two sites of each patients' house: bed and floor. Derpl and Blot5 levels were quantified by a two-site monoclonal antibody-based ELISA technique.Results The levels of Derpl allergens found in bed (geometric mean (GM) 3.43 μg/g of dust; 95%CI, 1.89-4.96 μg/g)and on the floor (GM 1.12 μg/g of dust; 95%CI, 0.71-1.53 μg/g) indicated significant differences (P=0.005). However, the levels of Blot5 allergens found in bed (GM 19.00 μg/g of dust; 95%CI, 0.89-38.90 μg/g) and on the floor (GM 6.14 μg/g of dust; 95%CI, 0.40-11.90 μg/g) showed no statistically significant difference. In addition, in regards to the exposure index for Derpl and Blot5 allergens found in bed and on the floor, 17.6% in bed and 8.6% on the floor had levels of Blot5 ≥ 10 μg/g of dust, higher than those obtained for Derp1 (7.2% and 0% in bed and on the floor respectively, P< 0.05); higher percentages in bed and on the floor (25.0% and 35.7%) were observed for levels of Blot5 =0 μg/g of dust as compared with Derpl in bed and on the floor (4.3% and 14.5% respectively, P< 0.05).Conclusions Derpl and Blot5 are the major allergens found in this regional study, Blot5 is a more potent allergen in Hongkong, probably reflecting the high level of exposure to Blomia tropicalis (Bt). Bt and Dermatophagoides pteronyssinus (Dp) allergens should be included for precise diagnosis and effective immuno-therapeutic treatment of mite allergy in Hongkong.  相似文献   

20.
ANTI-PROLIFERATION EFFECT OF ORIDONIN ON HL-60 CELLS AND ITS MECHANISM   总被引:4,自引:0,他引:4  
Objcetive To investigate the anti-proliferation effect of oridonin on leukemic HL-60 cells and its mechanism. Methods HL-60 cells in vitro in culture medium were given different concentrations of oridonin. The inhibitory rate of cells were measured by microculture tetrazolium (MTT) assay, cell apoptotic rate was detected by flow cytometry (FCM), morphology of cell apoptosis was observed by hoechst 33258 fluorescence staining, and the activity of telomerase was detected using telomere repeat amplification protocol (TRAP) PCR-ELISA before and after apoptosis occurred. Results Oridonin could decrease telomerase activity, inhibit growth of HL-60 cells, and cause apoptosis significantly. The suppression was both in time- and dose-dependent manner. Marked morphological changes of cell apoptosis including condensation of chromatin and nuclear fragmentation were observed clearly by hoechst 33258 fluorescence staining especially after cells were treated 48-60 hours by oridonin. Conclusions Oridonin has apparent anti-proliferation and apoptotic effects on HL-60 cells in vitro, decreasing telomerase activity of HL-60 cells may be one of its most important mechanisms. These results will provide strong laboratory evidence of oridonin for clinical treatment of acute leukemia.  相似文献   

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