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一种简便可靠大鼠肾移植模型的建立 总被引:1,自引:0,他引:1
目的 为开展器官移植的实验研究,建立一种简便可靠的大鼠肾移植模型。方法 用雄性Wistar大鼠作为供体和受体,左肾原位移植,HGA离体肾保存液原位低温灌注。供体肠系膜上动脉套叠吻合于受体左肾动脉;供体下腔静脉与受体左肾静脉端端吻合;供体输尿管保留直径约3mm的膀胱瓣,与受体膀胱吻合。结果 供、受体手术时间共约100~120min,成功率为89%。34例术后6~30d病理检查显示移植肾动静脉通畅,无缺血性损伤。结论 此模型可以在条件比较简陋的实验室开展,手术成功率高。 相似文献
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杜凡 《中国现代药物应用》2016,(6):279-282
目的探寻简便易行的慢性脊髓损伤模型建立方法 ,为探索脊髓型颈椎病的损伤机制、病理及进一步为治疗奠定基础。方法 56只成年wistar雌性大鼠,随机分为实验组和对照组,各28只。根据大鼠脊柱解剖结构特点自行设计一种大鼠脊髓压迫复合体,用以制作大鼠慢性压迫模型。运用行为学、病理组织观察等方法评价模型的可靠性。结果脊髓压迫后两组大鼠行为学评分(BBB)比较差异有统计学意义(P<0.05);观察两组病理切片,可见实验组明显出现尼氏体减少,细胞核崩解,神经元坏死、减少,泡沫细胞形成,神经纤维脱髓鞘。结论本方法提供了一种理想的制作鼠慢性脊髓压迫损伤方法。 相似文献
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目的:建立一种控制性皮层撞击脑损伤大鼠模型。方法:采用BenchmarkTM颅脑损伤撞击器制备大鼠创伤性脑损伤,并在伤后1、3、5、7、28 d借助Morris水迷宫评价其认知功能,同时观察损伤部位及其邻近区域的形态学改变。结果:脑损伤大鼠寻找隐藏平台所用时间显著高于假手术组。损伤部位及海马回可见神经细胞肿胀、坏死,胶质细胞明显增生。经铜银染色可见神经元及其轴突溃变。结论:建立的大鼠控制性皮层撞击脑损伤模型重复性好,适合脑保护药物的药效学筛选。 相似文献
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不同时程吗啡给药大鼠部分脑区超微病理变化观察 总被引:3,自引:0,他引:3
目的:观察不同时程吗啡依赖大鼠依赖相关脑区超微病理结构变化。方法:背部皮下递增注射吗啡建立不同时程吗啡依赖大鼠模型,应用透射电镜对吗啡依赖大鼠依赖相关脑区LC、中脑导水管周围灰质、黑质、豆状核、杏仁核、海马进行观察,并与空白对照组进行比较。结果:吗啡依赖大鼠依赖相关脑区部分神经细胞肿胀或固缩,神经毡灶性水肿,有髓神经纤维髓鞘分离,线粒体肿胀、畸形,内质网扩张,多聚核糖体解聚,轴突、树突灶性水肿,细胞器稀疏,突触小泡密集并向活性区聚集。空白对照组未见异常。结论:吗啡依赖大鼠依赖相关脑区神经细胞呈缺血、缺氧性及退行性改变。 相似文献
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目的:探讨哮喘时肺组织炎症、中性粒细胞(PMN)、肺泡Ⅱ型(AT-Ⅱ)细胞等的病理改变和转化生长因子-β1(TGF-β1)的表达及地塞米松对其的影响.方法:建立哮喘大鼠模型,支气管肺泡灌洗液(BALF)行细胞计数,光镜、电镜观察肺组织病理改变,免疫组化法检测肺组织TGF-β1的表达.结果:BALF中A组细胞总数、EOS计数显著性高于C组(P<0.01),D组显著性高于C组但低于A组(均P<0.01).肺组织中A组PMN计数显著性高于C组(P<0.01),D组显著性高于A组(P<0.01).A组AT-Ⅱ细胞变性、坏死、崩解、板层体空泡化现象.TGF-β1的表达水平在A组显著性高于C组(P<0.01),D组显著性高于C组但低于A组(分另为P<0.01,0.05).结论:哮喘大鼠肺组织炎症细胞浸润、气道黏膜损伤、AT-Ⅱ细胞损伤、表达水平增加;地塞米松可减少上述病理改变,但对肺组织中PMN数目有增加作用,可能会加重对肺组织的损伤. 相似文献
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目的探讨左肺切除联合野百合碱注射建立大鼠肺动脉高压模型的可行性。方法无特定病原体(SPF)级雄性sD大鼠22只,完全随机分为研究组(12只)和对照组(10只)。研究组大鼠切除左全肺,术后1周皮下注射野百合碱;对照组行假手术(仅单纯开胸),术后1周皮下注射0.9%氯化钠注射液。4周后比较2组大鼠平均肺动脉压(mPAP)、右心室肥大指数(RVHI)、肺小动脉管壁中膜厚度占血管外径百分比(WT%)、血管梗阻指数,并取右肺,比较2组病理学特征差异。结果研究组大鼠mPAP明显高于对照组[(42.4±2.8)mmHg(1mmHg=0.133kPa)比(19.0±2.6)mmHg],差异有统计学意义(P〈0.05);光镜下,肺小血管肌化程度增强,研究组RVHI、WT%、血管梗阻指数均明显大于对照组[(0.61±0.10)比(0.27±0.05)、(4.52-±1.19)比0、(26.38±4.27)比(1.82±0.13)],差异均有统计学意义(均P〈0.05)。结论左肺切除联合野百合碱注射用于建立大鼠肺动脉高压模型,模型大鼠肺血管结构发生明显变化。 相似文献
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目的:应用颅内高压法建立大鼠脑死亡模型,并将爆发式和渐进式颅内高压脑死亡模型进行比较.方法:SD大鼠60只,随机分为对照组(A组)20只、爆发式脑死亡组(B组)20只和渐进式脑死亡组(C组)20只,在呼吸机维持下,生物机能实验系统监测大鼠脑死亡状态6 h,实验过程中监测动脉压及心率的变化,并比较手术成功率.结果:脑死亡组诱导成功32只,诱导后期动脉压及心率骤然升高后,又逐渐下降,其中B组急剧下降,幅度明显,有5只因动脉压过低剔除研究,而C组下降幅度缓慢;与A组比较,脑死亡组谷值和峰值时动脉压及心率的差异均有统计学意义(P<0.05),手术成功率B组70%(14/20)小于C组90%(18/20).结论:应用颅内高压法能成功建立稳定可靠的大鼠脑死亡模型,其中渐进式颅内高压脑死亡模型有更高的手术成功率. 相似文献
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Wistar大鼠心气虚证模型的建立与评价 总被引:10,自引:0,他引:10
目的:用强迫跑步、控食及大剂量心得安等复合因素建立Wistar大鼠心气虚证动物模型。方法:造模组实验全过程控食、强迫跑步,以翻正反射消失为疲劳标准。第17天起每日灌服大剂量心得安溶液,连续4天。第21天进行指标测定。然后将余下的大鼠灌服补心气口服液作为药物反证组,连续12天。结果:动物一般症状与体征符合气虚证表现,血流动力学显示平均 dp/dtmax、平均Vpm等指标均低于正常组,平均-dp/dtmax等指标均高于正常组,提示心室的收缩舒张功能有所降低,此外SOD也显著降低,心肌超微结构受到损伤,经补气治疗后以上指标均有改善。结论:强迫跑步、控食及大剂量心得安等复合因素可以复制基本符合中医理论的心气虚证动物模型。 相似文献
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目的建立9L/F344大鼠颅内脑胶质瘤模型,用增强MRI动态观察肿瘤生长。方法应用大鼠立体定向仪,在F344大鼠右侧尾状核区接种9L胶质瘤细胞1×105个;观察大鼠的生存状态、体重及活动等情况;分别于大鼠接种后第8、12、17、20、23天在小动物线圈下行大鼠头部强化MRI检查,动态观察肿瘤的生长情况;第20天,取肿瘤标本做组织病理学和神经胶质细胞纤维酸性蛋白(GFAP)免疫组化检查。结果大鼠平均生存期25d。大鼠成瘤率100%。增强MRI动态观察显示同一时期内大鼠的肿瘤体积均一,肿瘤的生长速度和形态符合胶质瘤生长特性;肿瘤组织病理学上接近人恶性脑胶质瘤的病理特点。结论该方法建立的9L/F344大鼠脑胶质瘤动物模型稳定性好,移植瘤生长均一,适合用于胶质瘤的基础研究。 相似文献
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Mohammad Hossein Boskabady Sayed Abas Tabatabai Tahereh Farkhondeh 《Environmental toxicology》2016,31(4):452-460
The association between lead exposure and respiratory diseases including asthma is controversial. Some studies indicate that exposure to environmental lead pollution may cause asthma; however, there is not sufficient data in this regard. The effect of lead on lung pathological findings and serum inflammatory mediators in sensitized and non‐sensitized guinea pigs exposed to inhaled lead was examined. Eleven animal groups including control, sensitized, three groups of non sensitized animals, three groups during sensitization, and three groups after sensitization exposed to aerosol of three lead concentrations (n = 6 for each group) were studied. Serum inflammatory mediators levels and lung pathological changes were evaluated. All pathological changes and serum ET‐1, EPO, NO levels were significantly higher in the sensitized and non sensitized animals exposed to lead than control group (p < 0.05 to p < 0.001). There was no significant difference between non sensitized groups exposed to high lead concentration and sensitized group. Serum inflammatory mediators levels and pathological findings in sensitized groups exposed to lead both during and after sensitization were significantly higher than sensitized non exposed group (p < 0.05 to p < 0.001). The data of exposed animals to high lead concentration were significantly higher than those of medium and low concentrations; those of medium concentration were also higher than low concentration (p < 0.05 to p < 0.001). In summary, the present study indicates that exposure to inhaled lead is able to induce respiratory changes similar to asthma. In addition, the results indicated that exposure to environmental lead is able to aggravate asthma severity both during development of asthma or after its manifestation. © 2014 Wiley Periodicals, Inc. Environ Toxicol 31: 452–460, 2016. 相似文献
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肝硬变与胆囊病变的研究 总被引:3,自引:0,他引:3
目的研究肝硬变合并胆囊病变的发病率及发病机理。方法对150例肝硬变患进行胆囊研究。结果肿囊正常仅占38.67%,胆囊异常占61.33%,胆囊壁增厚占31.33%,胆囊肿大占4.00%,胆囊萎缩占3.33%,胆囊收缩功能减退占1.33%。胆囊结石患87.5%发生于肝硬变失代偿期,74.19%的胆结石病例伴有脾功能亢进。结论肝硬变并发胆囊病变发生率超过61%,值得临床重视。 相似文献
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《Environmental toxicology and pharmacology》2014,37(2):580-591
An experiment was conducted to determine the toxic effects of zearalenone (ZEN) on oxidative stress, inflammatory cytokines, biochemical and pathological changes in the kidney of pregnant rats, and to explore the possible mechanism in ZEN induced kidney damage. The rats were fed a normal diet treated with 0.3, 48.5, 97.6 or 146 mg/kg ZEN in feed on gestation days (GDs) 0 through 7, and then all the rats were fed with a normal diet on GDs 8 through 20. The results showed that ZEN induced kidney dysfunction, oxidative damage, pathological changes and increased mRNA and protein expression of TLR4 and inflammatory cytokines in kidney in dose-dependent manner. The results indicated that ZEN caused kidney damage of pregnant rats and TLR4-mediated inflammatory reactions signal pathway was one of the mechanisms of ZEN mediated toxicity in kidney. 相似文献
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Objective To explore the diagnostic value of color doppler ultrasound on anery of lower extremity pathological changes in diabetes.1iltthtMs Through observing their blood vessel shape,IMT thickness,gruel type hardening plaque,stenosis or blocking up and blood stream dynamics cbange situation,we tried to inspect the double lower limb artery and compare the diabetes group with the nonin the observed group were more than those in control group,and there was significant difference between them(P<0.05)Conclusion The diagnostic of color doppler ultrasound on artery of lower extremity pathological changes in diabetes has the advantages of high sensitivity,good intuitive and repetitive,noninvasive and inexpansive,so it should be one of regular routine inspection projects for DM patient and deserve to clinical application. 相似文献
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Objective To explore the diagnostic value of color doppler ultrasound on anery of lower extremity pathological changes in diabetes.1iltthtMs Through observing their blood vessel shape,IMT thickness,gruel type hardening plaque,stenosis or blocking up and blood stream dynamics cbange situation,we tried to inspect the double lower limb artery and compare the diabetes group with the nonin the observed group were more than those in control group,and there was significant difference between them(P<0.05)Conclusion The diagnostic of color doppler ultrasound on artery of lower extremity pathological changes in diabetes has the advantages of high sensitivity,good intuitive and repetitive,noninvasive and inexpansive,so it should be one of regular routine inspection projects for DM patient and deserve to clinical application. 相似文献
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目的探讨用影像叠加技术诊断颅底病变。方法对检查组40例需颅脑横断扫描患者进行相邻层面CT薄层横断扫描进行融合叠加,与对照组40例单层法扫描影像进行比较。结果检查组叠加法伪影少各项指标无显著性差异,说明叠加法测量误差比较小,而单层法的各项测量数值有显著性差异,说明其重复性差。结论采用图像叠加技术能减少测量误差,有利于脑组织疾病的正确诊断。 相似文献
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Objective To explore the diagnostic value of color doppler ultrasound on anery of lower extremity pathological changes in diabetes.1iltthtMs Through observing their blood vessel shape,IMT thickness,gruel type hardening plaque,stenosis or blocking up and blood stream dynamics cbange situation,we tried to inspect the double lower limb artery and compare the diabetes group with the nonin the observed group were more than those in control group,and there was significant difference between them(P<0.05)Conclusion The diagnostic of color doppler ultrasound on artery of lower extremity pathological changes in diabetes has the advantages of high sensitivity,good intuitive and repetitive,noninvasive and inexpansive,so it should be one of regular routine inspection projects for DM patient and deserve to clinical application. 相似文献
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目的 分析常规心电图有缺血性ST -T改变的导联与病变冠状动脉的对应关系。 方法 选择 6 1例经冠脉造影证实为单支病变的患者 ,与常规心电图对照 ,对比分析缺血性ST -T改变的导联与病变冠状动脉的对应关系 ,并采用 χ2 检验 ,P <0 0 5为有显著性差异。 结果 有A组心电图 (Ⅱ、Ⅲ、avL)改变者共 2 3例 ,其中右冠状动脉 (RCA)病变者 12例 ,与左前降支 (LAD)及左回旋支 (LCX)相比 ,差异具有显著性 (P <0 0 5及P <0 0 1) ;B组心电图 (ⅠavL)改变 12例 ,RCA病变者为 0 ,LAD与LCX对比分析无显著性差异 (P >0 0 5 ) ;C组心电图 (V1-V6 )改变共 39例 ,LAD病变 2 9例 ,与RCA相比差异显著 (P <0 0 1) ,与LCX相比无显著性差异(P >0 0 5 )。 结论 A组心电图改变与RCA病变、C组心电图改变与LAD病变均有良好的相关性 ;单纯B组心电图改变可除外RCA病变 ,但不能判断病变血管是LAD还是LCX。 相似文献
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目的探讨后腹腔镜手术治疗肾脏占位性病变的方法和效果。方法使用后腹腔镜保留肾单位的肾部分切除术,肿瘤剜除术及去顶减压术。结果48例手术全部成功,手术时间43~124min,平均手术时间77min;术中失血30~410mL,平均术中失血115mL,术后住院6~12d,平均住院时间9d,无严重并发症。48例随访3~37月。结论后腹腔镜下保留肾单位手术(nephron sparing surgery)及去项减压术治疗肾脏占位性病变具有暴露充分、出血少、恢复快等优势,值得临床推广。 相似文献
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目的总结糖尿病性视网膜病变的护理体会。方法回顾性分析本院收治的42例糖尿病性视网膜病变患者的临床护理资料。结果通过治疗与精心细致的护理,本组42例糖尿病性视网膜病变患者均在10~18d后治愈或好转出院,无一例出现失明。结论对糖尿病性视网膜病变患者临床应当采取多方面的护理措施,以有效防止糖尿病视网膜病变的发生和发展,减少失明的风险。 相似文献