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长期低剂量皮下注射鱼藤酮制作大鼠帕金森病模型 总被引:8,自引:0,他引:8
目的研究长期低剂量皮下注射鱼藤酮制作Lew is大鼠帕金森病模型。方法Lew is大鼠随机分为正常对照组和模型组,以1.0 mg.kg-1.d-1的剂量皮下注射鱼藤酮,早晚2次注射,连续给药30 d,每周停药1 d。给药结束后,心脏灌注多聚甲醛固定,断头取脑,免疫组化和尼氏染色检测黑质(SN)多巴胺神经元损伤情况,并在共聚焦显微镜下观察α-synuc le in的聚集。结果模型组大鼠3只出现震颤。SN处酪氨酸羟化酶(TH)阳性细胞数也出现不同程度的减少,尼氏染色显示SN神经元减少,并伴有胶质细胞增生,黑质多巴胺能细胞胞浆内有-αsynuc le in阳性聚集体,模型成功率约为58%。结论长期皮下注射鱼藤酮(1.0 mg.kg-1.d-1)可复制大鼠帕金森病病理模型。 相似文献
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目的观察鱼藤酮对大鼠中脑α-突触核蛋白(α-SYN)的影响。方法SD大鼠长期低剂量皮下注射1.0mg·kg-1·d-1的鱼藤酮,建立帕金森病(PD)动物模型。采用旷场实验评价动物行为学改变,观察大鼠5min的活动情况。免疫荧光化学方法检测中脑部位TH阳性神经元数目的变化。免疫组织化学和Western blot方法检测中脑部位α-SYN的蛋白水平的改变。结果同对照组相比,鱼藤酮实验组动物5min的正中格停留时间明显延长(P<0.05),方格穿行次数明显减少(P<0.05),竖起时间和次数明显减少(P<0.01);中脑部位TH阳性神经元数目明显减少(P<0.05),α-SYN蛋白水平明显增加(P<0.05)。结论给予鱼藤酮能够使SD大鼠出现运动障碍,中脑部位TH阳性神经元数目减少,该现象可能与大鼠中脑部位α-SYN蛋白水平增加有关。 相似文献
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目的:探讨人参皂苷Rg3对鱼藤酮纳米脂质载体诱导的帕金森病模型大鼠黑质神经元的保护作用。方法:采用雄性成年大鼠(SD)36只,随机分为对照组、模型组、低剂量组、中剂量组、高剂量组和阳性药物组,每组6只,分别编号1~6号。各组大鼠均于造模前3 d开始给药,每天1次,连续31 d,低剂量组给予3 mg/kg Rg3灌胃,中剂量组给予6 mg/kg Rg3灌胃,高剂量组给予12 mg/kg Rg3灌胃,阳性药物组给予11 mg/kg司来吉兰灌胃,对照组及模型组给予同等剂量羧甲基纤维素钠(CMC-Na)灌胃。灌胃3 d后,除对照组外其余5组大鼠均皮下注射鱼藤酮纳米脂质载体(R-NLC),首剂量给予0.5 mg/kg,第2次给予0.8 mg/kg,此后每次1 mg/kg, 2 d一次,连续28 d,对照组皮下注射同等剂量空白纳米脂质载体。采用肌僵直实验和外观行为表现评分考察外观行为学表现;黑质HE染色和透射电镜观察神经元形态和细胞超微结构情况。结果:给药28 d后,模型组外观行为表现评分高于对照组(P<0.05),Rg3低、中、高剂量干预后,外观行为表现评分低于模型组(P<0.05)... 相似文献
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《沈阳药科大学学报》2017,(10):893-898
目的观察鱼藤酮对帕金森模型大鼠各脏器的损伤,探讨牛蒡苷元对其缓解与治疗作用。方法采用颈背部皮下注射鱼藤酮葵花油乳化液4周的方法建立大鼠帕金森模型,并灌胃给予不同剂量的牛蒡苷元进行干预治疗,观察各组大鼠脏器指数。采用HE染色法和电镜法观察大鼠脏器损伤程度,检测血清中丙氨酸转移酶(alanine aminotransferase,ALT)、肌酐(creatinine,CRE)与尿素氮(urea nitrogen,BUN)的含量。结果模型组大鼠的肝指数和肾指数与正常组相比显著升高,血清中ALT与BUN的含量显著升高(P≤0.01),肝脏切片显示肝脏内存在着中央静脉扩张、慢性炎症细胞浸润等病理改变,肾皮质和髓质内均有慢性出血和炎性浸润,并可见肾小球固缩。牛蒡苷元治疗后肝肾指数显著降低,血清中ALT与BUN明显降低(P≤0.01),肝肾相应损伤有所缓解。结论牛蒡苷元能有效抑制鱼藤酮所致的大鼠肝脏和肾脏肿大,可缓解和治疗鱼藤酮所引起肝和肾的损伤。 相似文献
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目的 观察莱菔硫烷(sulforaphane,SF)对帕金森(PD)病大鼠模型脑内黑质多巴胺能神经元的保护作用.方法 健康成年雄性Wistar大鼠背部皮下注射鱼藤酮制备PD大鼠模型,药物治疗组同时给予大鼠腹腔注射EGCG.采用分光光度法检测大鼠脑内丙二醛(MDA)和还原型谷胱甘肽(GSH),免疫细胞化学和免疫印记检测大鼠中脑黑质及纹状体中络氨酸羟化酶(TH)的表达变化.结果 Western blot结果显示试验组大鼠脑内中脑和纹状体中TH蛋白表达都比对照组有明显降低(P<0.05);莱菔硫烷药物干预后TH蛋白在中脑和纹状体比试验组明显增高(P<0.05),但是较对照组仍有明显减少(P<0.05).实验组大鼠在给予鱼藤酮背部皮下注射后导致大鼠脑内纹状体中脂质代谢产物MDA含量比对照组明显增加(P<0.01).莱菔硫烷药物干预组大鼠脑内纹状体中MDA明显减少(P<0.05),但较对照组仍明显增加(P<0.05).同时我们发现鱼藤酮背部皮下注射可以导致实验组大鼠脑内纹状体中GSH的含量比对照组明显减少(P<0.01);莱菔硫烷药物干预后大鼠脑内纹状体中GSH含量较实验组明显增加(P<0.05),但较对照组仍明显减少(P<0.05).结论 氧化应激在PD发病中起着非常重要的作用,抗氧化治疗能有效减轻大鼠脑内多巴胺能神经元损伤情况,同时改善PD样症状,为PD的治疗提供了新的靶点. 相似文献
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目的:研究黄芩苷对阿霉素所致心脏毒性的预防性作用及可能的机制。方法:64例接受CAF化疗方案的乳腺癌患者被随机分为预防组和对照组,预防组化疗前及化疗同时口服黄芩苷胶囊,对照组单用化疗。化疗1个周期后比较患者心电图(electro-cardiograph,ECG)、左室射血分数(left ventricular ejection fraction,LVEF)变化、血浆超氧化物歧化酶(superoxide dismutase,SOD)、血浆心肌肌钙蛋白I(cardiac troponin I,cTnI)。结果:预防组ECG异常改变较少、SOD、LVEF降低少,cTnI增加少。结论:黄芩苷可能通过降低自由基抗阿霉素所致心脏毒性。 相似文献
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Chih-Chung Wu Wei-Lin Chang Chih-Huei Lu Yueh-Ping Chang Jyh-Jye Wang Shu-Ling Hsieh 《Yao wu shi pin fen xi = Journal of food and drug analysis.》2015,23(3):425
Gynura bicolor (Roxb. & Willd.) DC. is widely distributed in certain areas of Asia and is very popular in vegetarian cuisine in Taiwan. This study investigates the effects of G. bicolor extracts with different polarities of 80 mg/kg body weight (BW) G. bicolor alcohol extract, 80 mg/kg BW G. bicolor water extract, and 80 mg/kg BW G. bicolor ether extract on Fe bioavailability using the hemoglobin repletion efficiency assay. Wistar rats were assigned to five groups: a group receiving an iron-deficient (ID) diet; a group receiving an ID diet supplemented with ferrous sulfate (20 mg Fe/kg BW); and three groups receiving ID diets supplemented with ferrous sulfate and one of G. bicolor alcohol extract, G. bicolor water extract, or G. bicolor water extract. The results indicated that the levels of hemoglobin, serum iron, serum ferritin, liver ferritin, hemoglobin regeneration efficiency, relative biological value, and hepcidin all were significantly higher than those of the ID diet group. Besides, the iron transporter divalent metal transporter-1 was significantly reduced, but iron release protein expression of ferroportin was significantly increased. It was concluded that G. bicolor extracts may promote iron bioavailability and regulate the expressions of divalent metal transporter-1 and ferroportin. 相似文献
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Xixun Du Huamin Xu Hong Jiang Jun Wang Lei Wang Junxia Xie 《Frontiers of Medicine in China》2009,3(1):67-71
Divalent metal transporter 1 (DMT1) is a ferrous iron import protein. The improper expression of DMT1 is involved in neurodegenerative
diseases. In the present study, we constructed a recombinant adenovirus containing the gene of DMT1 without the iron response
element (DMT1-IRE) and investigated its expression and function in the C6 glioma cell line. The DMT1-IRE gene, obtained by
RT-PCR, was cloned into the shuttle plasmiding pAdTrack-CMV containing green fluorescent protein (GFP) reporter gene. Linearized
plasmid pAdTrack-CMV-DMT1-IRE was subsequently co-transformed into Escherichia coli (E. coli) BJ5183 cells along with an adenoviral backbone plasmid pAdEasy-1 after digestion with Pme I. Pac I-digested pAdEasy1-DMT1-IRE was then transfected into E1-transformed human embryonic kidney cells (HEK293 cells), in which
recombinant adenoviruses were generated within 7 to 10 days. The results demonstrated that we obtained the DMT1-IRE gene.
pAdEasy1-DMT1-IRE yielded a large fragment, plus a smaller fragment of 4.5 kb after digestion with Pac I. PCR confirmed pAdEasy1-DMT1-IRE contained gene DMT1-IRE, indicating the successful construction of recombinant adenovirus
plasmid containing DMT1-IRE. GFP fluorescence further confirmed the generation of recombinant AdDMT1-IRE adenovirus. AdDMT1-IRE
could efficiently infect C6 glioma cells. And cell viability decreased in AdDMT1-IRE infected cells after iron overload compared
to the control. These results suggest that the over expressed DMT1-IRE can aggravate the iron induced cell death due to its
iron influx function.
Both authors contributed equally to the work. 相似文献
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黄芩苷对STZ糖尿病大鼠肾脏的保护及其与VEGF的关系 总被引:1,自引:0,他引:1
目的:探讨黄芩苷对糖尿病大鼠肾脏病变的影响。方法:将实验大鼠随机分为3组,正常对照组(A)、糖尿病对照组(B)和糖尿病黄芩苷灌胃组(C),所用黄芩苷剂量为200mg.kg-1。实验为期4周,观察血糖、糖化血红蛋白、体质量/肾质量比和尿白蛋白排泄率,用免疫组化法检测肾小球血管内皮生长因子(VEGF)的表达。结果:1.糖尿病大鼠血糖和糖化血红蛋白增高、肾质量/体质量比增加,肾小球节段性系膜细胞增生,肾小管空泡变性,少数肾小管上皮细胞坏死,肾小球VEGF表达增加;2.C组和B组相比血糖无明显变化,肾质量/体质量比无明显变化,但糖化血红蛋白明显降低,尿白蛋白排泄率降低,肾小球无明显异常,肾小管上皮轻度空泡变性,VEGF表达减少。结论:本实验初步研究表明,黄芩苷对STZ糖尿病大鼠肾脏病变具有一定的保护作用,其机理可能与抑制蛋白糖化及VEGF表达减少有关。 相似文献
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目的观察硝苯地平对慢性铁过负荷大鼠肝、肾和脾组织铁沉积与营养代谢的影响,探讨硝苯地平治疗铁过负荷等代谢疾病的可能性。方法雄性SD大鼠连续8周喂饲铁含量为3.5 g.kg-1的高铁饲料,制备慢性铁过负荷动物模型。8周后,模型大鼠ip给予硝苯地平1,3和5 mg.kg-1,连续7 d。组织学染色观察肝、肾和脾组织铁沉积,用试剂盒分别测定血脂、脂质过氧化及抗氧化指标,同时测定血清铁蛋白(SF)和总铁结合力(TIBC);用全自动生化分析仪或荧光分光光度计检测血清中营养元素铁、钙、锌和硒的含量。结果与正常对照组比较,慢性铁过负荷模型组大鼠肝、肾和脾组织中铁沉积明显;与模型组比较,硝苯地平5 mg.kg-1组组织中铁沉积明显降低(P<0.05,P<0.01)。与正常对照组比较,模型组血清甘油三酯(TG)含量由1.25±0.21升高到(1.86±0.75)mmol.L-1,总胆固醇(TC)由1.52±0.17升高到(1.91±0.34)mmol.L-1,丙二醛(MDA)由11.2±2.8升高到(15.3±3.6)μmol.L-1,谷胱甘肽过氧化物酶(GSH-Px)活性由204±52升高到(286±75)kU.L-1(P<0.05),高密度脂蛋白(HDL)、低密度脂蛋白(LDL)含量和超氧化物歧化酶(SOD)活性无明显变化;与模型组比较,硝苯地平5 mg.kg-1组TC降低到(1.65±0.36)mmol.L-1,LDL由1.14±0.15降低到(0.86±0.16)mmol.L-1,MDA含量降低到(11.9±3.5)μmol.L-1(P<0.05),TG,HDL,SOD和GSH-Px无明显变化;硝苯地平1和3 mg.kg-1对上述指标无明显影响。与正常对照组比较,模型组血清中铁含量由1.21±0.11升高到(1.57±0.25)mg.L-1,SF由232±17升高到(348±46)mg.L-1,锌、硒和钙含量分别由1.8±0.6,0.096±0.018和(120±26)mg.L-1降低到1.4±0.4,0.072±0.012和(77±15)mg.L-1(P<0.05,P<0.01),TIBC无明显变化;与模型组比较,硝苯地平5 mg.kg-1组血清铁含量降低到(1.32±0.14)mg.L-1,硒含量升高到(0.087±0.017)mg.L-1,钙含量升高到(97±16)mg.L-1(P<0.05),对SF,TIBC和锌含量无明显影响;硝苯地平1和3 mg.kg-1对上述指标无明显影响。结论硝苯地平能减少铁沉积,改善慢性铁过负荷大鼠的营养代谢,对铁过负荷等代谢疾病可能具有一定的治疗作用。 相似文献
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Intestinal absorption of cadmium is associated with divalent metal transporter 1 in rats. 总被引:4,自引:0,他引:4
The intestinal absorption of cadmium (Cd) increases when the body iron (Fe) stores are depleted. The depletion of Fe upregulates the expression of divalent metal transporter 1 (DMT1), which is located at the apical membrane of enterocytes lining the small intestine. DMT1 has been shown to transport Fe and other divalent metal ions in vitro. However, it is not known whether DMT1 mediates the intestinal absorption of Cd. To investigate DMT1 involvement in Cd absorption, rats were fed a diet for 4 weeks either deficient in Fe (FeD diet, 2-6 mg Fe/kg) or supplemented with Fe (FeS diet, 120 mg Fe/kg), followed by a single oral administration of 109 CdCl2. Body Fe status, hemoglobin, and tissue Cd concentration were determined at 48 h after Cd administration. Also, DMT1 mRNA levels were quantified in duodenum, kidney, and liver by the branched DNA signal amplification method. Animals fed the FeD diet exhibited a reduced body weight gain, depletion of body Fe, and Fe deficiency anemia. Tissue Cd concentration was significantly higher in FeD than in FeS diet-fed rats, especially in the duodenum. The amount of Cd retained in the body was 10-fold higher in rats fed the FeD diet than in those fed the FeS diet. DMT1 mRNA was highly expressed in duodenum and was 15-fold higher in the FeD diet group. The levels of DMT1 mRNA were significantly lower in kidney and liver than in duodenum, but were 30 and 40% higher, respectively, in rats fed the FeD diet than in rats fed the FeS diet. These findings suggest that functional DMT1 protein is likely upregulated in the small intestine at the mRNA level by body iron depletion and increases Cd uptake from the gastrointestinal tract with subsequent transfer of Cd to the circulation and body tissues. Furthermore, the data from this study may indicate that DMT1 is a nonspecific metal transporter, which can transport not only Fe, but probably the toxic metal as well. 相似文献
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目的:观察黄芩苷对出血性大鼠脑内γ氨基丁酸运载蛋白1(GAT-1)和γ氨基丁酸A受体(GABAAR)表达的影响,探讨黄芩苷对大鼠脑损伤的保护机制。方法:采用胶原酶+肝素钠法诱导脑出血模型,并随机分为假手术组、对照组和给药组,分别灌胃给予生理盐水和黄芩苷。给药后12 h,24 h,72 h和7 d取出各组大鼠损伤侧脑组织制作冰冻切片进行免疫组化染色,测定标本中GAT-1和GABAAR阳性神经元的数目以及平均光密度值。结果:脑出血后GAT-1表达上调,GABAAR表达在出血后12 h有所上调,24 h后开始下降,d 7时GAT-1和GABAAR表达恢复到与假手术组比较无显著差异的水平。与模型组比较,给药组GAT-1阳性神经元数目明显下降,GABAAR阳性神经元数目明显增多。平均光密度值与阳性神经元数目变化成正相关。结论:GAT-1和GABAAR参与脑出血后神经元损伤的病理生理过程,黄芩苷可能通过抑制GAT-1的表达、增加GABAAR的表达挽救受损神经元。 相似文献
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目的:观察黄芩苷对出血性大鼠脑内γ氨基丁酸运载蛋白1(GAT-1)和γ氨基丁酸A受体(GABAAR)表达的影响,探讨黄芩苷对大鼠脑损伤的保护机制。方法:采用胶原酶+肝素钠法诱导脑出血模型,并随机分为假手术组、对照组和给药组,分别灌胃给予生理盐水和黄芩苷。给药后12 h,24 h,72 h和7 d取出各组大鼠损伤侧脑组织制作冰冻切片进行免疫组化染色,测定标本中GAT-1和GABAAR阳性神经元的数目以及平均光密度值。结果:脑出血后GAT-1表达上调,GABAAR表达在出血后12 h有所上调,24 h后开始下降,d 7时GAT-1和GABAAR表达恢复到与假手术组比较无显著差异的水平。与模型组比较,给药组GAT-1阳性神经元数目明显下降,GABAAR阳性神经元数目明显增多。平均光密度值与阳性神经元数目变化成正相关。结论:GAT-1和GABAAR参与脑出血后神经元损伤的病理生理过程,黄芩苷可能通过抑制GAT-1的表达、增加GABAAR的表达挽救受损神经元。 相似文献
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目的:观察黄芩苷对出血性大鼠脑内γ氨基丁酸运载蛋白1(GAT-1)和γ氨基丁酸A受体(GABAAR)表达的影响,探讨黄芩苷对大鼠脑损伤的保护机制。方法:采用胶原酶+肝素钠法诱导脑出血模型,并随机分为假手术组、对照组和给药组,分别灌胃给予生理盐水和黄芩苷。给药后12 h,24 h,72 h和7 d取出各组大鼠损伤侧脑组织制作冰冻切片进行免疫组化染色,测定标本中GAT-1和GABAAR阳性神经元的数目以及平均光密度值。结果:脑出血后GAT-1表达上调,GABAAR表达在出血后12 h有所上调,24 h后开始下降,d 7时GAT-1和GABAAR表达恢复到与假手术组比较无显著差异的水平。与模型组比较,给药组GAT-1阳性神经元数目明显下降,GABAAR阳性神经元数目明显增多。平均光密度值与阳性神经元数目变化成正相关。结论:GAT-1和GABAAR参与脑出血后神经元损伤的病理生理过程,黄芩苷可能通过抑制GAT-1的表达、增加GABAAR的表达挽救受损神经元。 相似文献
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目的:观察黄芩苷对出血性大鼠脑内γ氨基丁酸运载蛋白1(GAT-1)和γ氨基丁酸A受体(GABAAR)表达的影响,探讨黄芩苷对大鼠脑损伤的保护机制。方法:采用胶原酶+肝素钠法诱导脑出血模型,并随机分为假手术组、对照组和给药组,分别灌胃给予生理盐水和黄芩苷。给药后12 h,24 h,72 h和7 d取出各组大鼠损伤侧脑组织制作冰冻切片进行免疫组化染色,测定标本中GAT-1和GABAAR阳性神经元的数目以及平均光密度值。结果:脑出血后GAT-1表达上调,GABAAR表达在出血后12 h有所上调,24 h后开始下降,d 7时GAT-1和GABAAR表达恢复到与假手术组比较无显著差异的水平。与模型组比较,给药组GAT-1阳性神经元数目明显下降,GABAAR阳性神经元数目明显增多。平均光密度值与阳性神经元数目变化成正相关。结论:GAT-1和GABAAR参与脑出血后神经元损伤的病理生理过程,黄芩苷可能通过抑制GAT-1的表达、增加GABAAR的表达挽救受损神经元。 相似文献
20.
目的:观察黄芩苷对出血性大鼠脑内γ氨基丁酸运载蛋白1(GAT-1)和γ氨基丁酸A受体(GABAAR)表达的影响,探讨黄芩苷对大鼠脑损伤的保护机制。方法:采用胶原酶+肝素钠法诱导脑出血模型,并随机分为假手术组、对照组和给药组,分别灌胃给予生理盐水和黄芩苷。给药后12 h,24 h,72 h和7 d取出各组大鼠损伤侧脑组织制作冰冻切片进行免疫组化染色,测定标本中GAT-1和GABAAR阳性神经元的数目以及平均光密度值。结果:脑出血后GAT-1表达上调,GABAAR表达在出血后12 h有所上调,24 h后开始下降,d 7时GAT-1和GABAAR表达恢复到与假手术组比较无显著差异的水平。与模型组比较,给药组GAT-1阳性神经元数目明显下降,GABAAR阳性神经元数目明显增多。平均光密度值与阳性神经元数目变化成正相关。结论:GAT-1和GABAAR参与脑出血后神经元损伤的病理生理过程,黄芩苷可能通过抑制GAT-1的表达、增加GABAAR的表达挽救受损神经元。 相似文献