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1.
目的:研究IL-4mRNA和IL-4蛋白在哮喘大鼠CD34+细胞中的转录表达及孟鲁司特(montelukast,MK)对其表达的影响.方法:将SD大鼠随机分为3组:哮喘组、MK组和正常对照组.用卵白蛋白制备大鼠哮喘模型.应用双抗体夹心酶联免疫吸附试验测定血浆中IL一4和γ-干扰素(IFN-γ)浓度;用MinjMACS磁珠分选系统分离骨髓CD34+细胞;采用sYBR GREEN I荧光实时定量PcR法测定CD34+细胞中IL-4 mJRNA的相对表达量.采用免疫组化技术测定CD34+细胞中IL-4蛋白的表达量.结果:哮喘组骨髓CD34+细胞中IL-4mR NA和IL-4蛋白的表达量高于其它各组(P＜0.01);哮喘组除了IFN-γ水平低外,IL-4浓度和嗜酸性粒细胞(Eos)绝对值都是三组中最高的(P＜0.01);除哮喘组外,其余组的各项指标相近(P＞0.05).IL-4 mRNA表达量与IL-4浓度、Eos绝对值呈正相关(P＜0.01),与IFN-γ浓度呈负相关(P＜0.01).结论:哮喘大鼠骨髓CD34+细胞中IL-4mRNA的表达增强;孟鲁司特可以下调IL-4mRNA的表达.可能成为其抑制哮喘气道炎症形成的重要机制之一. 相似文献
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目的 通过6周运动和魔芋多糖干预,研究其对2型糖尿病大鼠的血糖、胰岛素水平、血脂、肝功能酶、抗氧化指标的影响.方法 本实验将大鼠分为5组:正常对照组(A组),2型糖尿病对照组(B组),2型糖尿病运动组(C组),2型糖尿病魔芋多糖组(D组),2型糖尿病联合强度运动组(E组);每组各10只.测试指标包括:(1)大鼠腹主动脉取血测试空腹血糖、胰岛素水平、TG、TC、HDL-c、LDL-c、ALT、AST;(2)肝组织中SOD和MDA含量.结果 (1)6周运动和魔芋多糖干预明显改善2型糖尿病大鼠血糖和血脂指标,联合干预较单一因素干预效果更加显著(P＜0.05);(2)6周运动和魔芋多糖干预均有效降低血清ALT (P＜0.01)含量,AST各组均降低(P＜0.05);(3)6周运动和魔芋多糖干预有效升高SOD水平、降低MDA水平,联合干预组抗氧化效果更好(P＜0.01).结论 通过6周运动和魔芋多糖单独或联合的干预方式,血糖、胰岛素水平和血指标表明:通过干预明显改善2型糖尿病糖、脂代谢紊乱,减少了脂质沉积,降低了转氨酶含量,提高了大鼠抗氧化功能. 相似文献
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山药多糖对糖尿病大鼠胰岛素及血小板数的影响 总被引：4，自引：0，他引：4
目的:观察山药多糖对四氧嘧啶诱导的糖尿病大鼠胰岛素以及血小板数的影响.方法:将四氧嘧啶糖尿病大鼠分成正常大鼠对照组、糖尿病模型对照组及治疗组,其中治疗组包括二甲双胍组和山药多糖小、中、大三个剂量组,二甲双胍组大鼠每日每只灌服二甲双胍剂量为0.8mg/kg,山药多糖小、中、大剂量组大鼠每日每只分别灌服50mg/kg、75mg/kg、100mg/kg的山药多糖精品.正常大鼠对照组、糖尿病模型大鼠对照组每日每只灌服等体积的生理盐水.灌服15d后进入实验程序的大鼠进行血糖测量.结果:与正常对照组比较,模型对照组大鼠血清胰岛素水平显著降低(P<0.01);山药多糖各剂量组的胰岛素水平无明显变化;与二甲双胍组比较,山药多糖各组胰岛素水平明显增高.山药多糖三个剂量组的血小板数与模型对照组比较有显著差异(P<0.01),与正常对照组比较无明显差异(P>0.05).结论:山药多糖对糖尿病大鼠的胰岛功能具有保护作用,能抑制血小板的异常激活和聚集. 相似文献
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目的:探讨H2S对大鼠局灶性脑缺血后神经元的保护作用.方法:将SD大鼠随机分为正常组、假手术组、模型组和硫氢化钠(NaHS)组,采用线栓法制作局灶性脑缺血模型,测定脑组织中丙二醛(MDA)、超氧化物歧化酶(SOD)、谷胱甘肤(GSH)含量,免疫组化法检测caspase-3的表达水平,原位末端标记(TUNEL)法检测凋亡水平.结果:与模型组比较,NaHS组大鼠脑组织中MDA含量明显下降(P＜0.05),GSH、SOD含量则显著升高(P＜0.01),脑组织caspase-3免疫阳性细胞和凋亡细胞数显著减少(P＜0.01).结论:H2S对大鼠局灶性脑缺血损伤的脑组织具有的作用,与H2S明显的抗氧化应激、减少神经细胞凋亡有关. 相似文献
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研究大鼠脑出血给予三七总皂甙治疗后,神经元Bcl-2和Bax的表达有无变化,并观察脑出血大鼠在不同时间点相干/湿重法测定脑含水量的变化.神经行为学检测结果表明,脑出血组大鼠的神经功能评分分值升高;2d后治疗组大鼠与脑出血组相比分值下降（P＜0.01）.免疫组织化学结果显示,治疗组Bcl-2的阳性表达较脑出血组高（P＜0.01）、Bax的阳性表达较脑出血组低（P＜0.01）,Bcl-2/Bax蛋白比值增高;脑含水量即12 h开始增加,24 h后比较明显,48 h达高峰,7d之后与正常组无明显差异.三七总皂甙治疗组48 h ～72h干预后,脑含水量明显低于其脑出血组（P＜0.05）. 相似文献
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目的:利用Bannisterr建立的颈动脉引流法制作大鼠急性脑缺血再灌注模型研究缺血预处理对一氧化氮(NO)代谢的影响.方法:将18只大鼠分为模型组、缺血预处理(IPC)组和对照组,观察血清和脑皮质中NO的变化.结果:模型组大鼠脑内及血清NO水平升高,较对照组有统计学差异(P＜0.01).IPC组和模型组相比血浆中NO含量增加(P＜0.01),脑皮质中NO含量降低(P＜0.01).结论:缺血预处理可通过抗自由基功能影响NO代谢并保护神经细胞. 相似文献
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目的:检测CD44v6mRNA和HSP70mRNA在胃癌组织中的表达,探讨CD44v6mRNA和HSP70mRNA在胃癌发生发展中的作用.方法:利用核酸原位杂交技术对39例胃癌组织进行检测.结果:CD44v6mRNA和HSP70mRNA在胃癌组织表达的阳性率都为61.54%(24/39),CD44v6mRNA和HSP70mRNA在高分化管状腺癌与低分化管状腺癌中的表达都有显著性差异(P＜0.05),但HSP70mRNA在胃癌组织的表达与性别、年龄、浸润深度及淋巴结有无转移都无关(P＞0.05),而CD44v6mRNA与淋巴结有无转移有关(P＜0.05).结论:CD44v6mRNA和HSP70mRNA在胃癌组织都有较高的表达,两者均可作为评估胃癌预后的指标. 相似文献
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通过游泳方法建立运动模型,观察不同运动负荷状态下大鼠肾脏组织病理变化.一般负荷运动组肾小管排列略紊乱,肾小球轻度肿大,超负荷运动组肾小管排列紊乱,肾小囊变小甚至消失,而对照组无变化.应用免疫组化法检测Bcl-2蛋白在不同负荷运动组的表达情况.超负荷运动组Bcl-2蛋白的表达比一般负荷组及对照组有显著性的降低(P＜0.05),一般负荷运动组Bcl-2蛋白表达与对照组相比没有显著性差异.应用末端脱氧核苷转移酶介导的缺口标记法检测大鼠肾脏组织细胞凋亡情况.一般负荷组细胞凋亡比对照组有显著性增加(P＜0.05),超负荷组与一般负荷组相比有显著性增加(P＜0.05),细胞凋亡的可能机制是:超负荷的运动刺激导致线粒体膜受到损伤,促使其释放了促凋亡因子,诱导了细胞的凋亡.研究结果表明:过度训练对肾脏组织结构造成一定损伤,使肾脏细胞凋亡增加,这或许是过度训练导致运动疲劳的原因之一. 相似文献
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目的观察滋阴潜阳法对模型大鼠的降压作用,探讨滋阴潜阳法发挥调节的作用机制.方法随机分为模型组、滋阴潜阳组、氯沙坦组、假手术组和正常对照组共5组,每组10只大鼠.结果血压变化:造模后2周,与假手术组相比,模型组大鼠动脉收缩压(SBP)明显升高,有统计学意义(P＜0.05).经过4周的用药,与模型组相比,氯沙坦组和滋阴潜阳组大鼠SBP明显降低,有统计学意义(P＜0.05).模型组与假手术组比较,胸腺、脾脏中淋巴细胞(少量的巨噬细胞)IL-6均表达显著升高(P＜0.001).滋阴潜阳组和氯沙坦组与模型组比较,IL-6的表达明显下调(P＜0.01).结论滋阴潜阳法能降低肾性高血压大鼠的血压,下调胸腺和脾脏中淋巴细胞IL-6表达可能是其降压机制之一. 相似文献
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王伟宝 《河北北方学院学报(医学版)》2010,27(6)
目的:研究糖尿病视网膜病变患者血小板参数、CD62p及hs-CRP水平,探讨这些指标的意义.方法:流式细胞技术测定100名糖尿病患者CD62p,免疫比浊法测定hs-CRP,SysmexXE2100测定血小板参数,并与正常对照组比较.结果:T2DM组MPV、PDW明显增大,PLT计数降低,CD62p表达明显增强,高敏C反应蛋白水平增高(P＜0.05).PDR组MPV、PDW、CD62p、高敏C反应蛋白水平均高于NPDR(P＜0.05).结论:糖尿病患者在高糖作用下血管内皮的损伤而引起血小板过度活化加速血管病变、炎症反应. 相似文献
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Jin-jing Wang Feng Ye Li-jia Cheng Yu-jun Shi Ji Bao Huai-qiang Sun Wei Wang Peng Zhang Hong Bu 《Journal of Zhejiang University. Science. B》2009,10(5):355-367
Objective: Large segmental bone defect repair remains a clinical and scientific challenge with increasing interest focusing on combining gene transfection with tissue engineering techniques. The aim of this study is to investigate the effect of connective tissue growth factor (CTGF) on the proliferation and osteogenic differentiation of the bone marrow mesenchymal stem cells (MSCs). Methods: A CTGF-expressing plasmid (pCTGF) was constructed and transfected into MSCs. Then expressions of bone morphogenesis-related genes, proliferation rate, alkaline phosphatase activity, and mineralization were examined to evaluate the osteogenic potential of the CTGF gene-modified MSCs. Results: Overexpression of CTGF was confirmed in pCTGF-MSCs. pCTGF transfection significantly enhanced the proliferation rates of pCTGF-MSCs (P<0.05). CTGF induced a 7.5-fold increase in cell migration over control (P<0.05). pCTGF transfection enhanced the expression of bone matrix proteins, such as bone sialo-protein, osteocalcin, and collagen type I in MSCs. The levels of alkaline phosphatase (ALP) activities of pCTGF-MSCs at the 1st and 2nd weeks were 4.0- and 3.0-fold higher than those of MSCs cultured in OS-medium, significantly higher than those of mock-MSCs and normal control MSCs (P<0.05). Overexpression of CTGF in MSCs enhanced the capability to form mineralized nodules. Conclusion: Overexpression of CTGF could improve the osteogenic differentiation ability of MSCs, and the CTGF gene-modified MSCs are potential as novel cell resources of bone tissue engineering. 相似文献
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INTRODUCTIONHypertensionisalwaysaccompaniedbyin creasesinarterywallthickness,mainlycausedbyproliferation ,hypertrophy ,migrationandap optosisofvascularsmoothmusclecells(VSMC) ,andelevatedcontentofconnectivetissue .Thesestructuralchangesinbloodvesselsarekn… 相似文献
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INTRODUCTION Bronchioloalveolar carcinoma (BAC) is a par-ticular subtype of pulmonary adenocarcinoma de-rived from clara cell and type II pneumocyte. BAC cells grow along and within alveolar spaces while the alveolar framework of the lung is preserved. The incidence of BAC appears to be rising recently. The etiology and pathogenesis of this unique neoplastic disease are still unclear; many studies of oncogene and tumor suppressor gene expression include BAC with all adenocarcinoma o… 相似文献
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目的:在康脑液方剂干预下观察皮质区内源性神经细胞干细胞因子(SCF)mRNA在大鼠脑缺血再灌注损伤后不同时间的表达情况。方法:成年SD大鼠,以线栓法建立大脑中动脉缺血再灌注模型,随机分为模型组、药物干预组和假手术组。原位杂交技术检测脑缺血1.5h再灌注1～14d后,脑皮质区SCFmRNA表达情况。结果:脑缺血再灌注后,药物干预组、模型组SCFmRNA的表达在皮质区均明显高于假手术组,于第7天达高峰,第14天下降。结论:药物干预后脑缺血再灌注脑皮质区SCFmRNA表达在不同时间点与模型组具备相同的表达规律,两组SCFmRNA的表达无显著性差异。 相似文献
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目的：通过康脑液干预观察其对脑缺血再灌注损伤大鼠血管内皮生长因子（vascular endothelial growth factor,VEGF）、脑源性神经生长因子（brain derived neurotrophic factor,BDNF）、基质金属蛋白酶（matrix metalloproteinase-9,MMP-9）表达的影响,探讨康脑液对脑缺血再灌注损伤的保护机制.方法：将雄性SD大鼠随机分为假手术组、脑缺血再灌注模型组及康脑液28.6、14.3、7.15 g·kg-1·d-1剂量组（灌胃给药7 d）,改进Longa等线栓法制备大鼠右侧大脑中动脉阻塞（middle cerebral artery occlusion,MCAO）再灌注模型.于缺血2h后再灌注（分别于再灌注后6h、12h、24 h、72 h、7d处死大鼠）;采用TTC染色法观察大鼠的脑梗死面积;免疫组织化学法观察大鼠脑组织VEGF、BDNF、MMP-9的表达.结果：比较各组缺血再灌注24 h大鼠脑梗死灶面积,发现28.6、14.3 g·kg--1·d-1剂量组较脑缺血再灌注模型组明显减小（P＜0.05）;与脑缺血再灌注模型组相比,28.6、14.3 g·kg--1·d-1剂量组各时间点的VEGF、BDNF表达量明显上调（P＜0.01）,MMP-9表达的阳性细胞明显减少（P＜0.01）,差异有统计学意义.结论：康脑液可促进大鼠局灶性脑缺血后脑组织中VEGF,BDNF的表达,同时抑制脑内MMP-9的表达,缩小脑梗死面积,发挥对神经血管单元（neurovascular unit,NVU）的保护作用,减轻脑缺血再灌注损伤. 相似文献
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Study on the neurotoxic effects of low-level lead exposure in rats 总被引：10，自引：0，他引：10
Objective: To investigate effects of developmental lead exposure on nitric oxide synthase (NOS) activity in different brain regions and on N-methyl-D-aspartate (NMDA) receptor mRNA expression in the hippocampus of rats. On the basis of these observations, we explored possible mechanisms by which lead exposure leads to impaired learning and memorizing abilities in children. Methods: A series of rat animal models exposed to low levels of lead during the developing period was established (drinking water containing 0.025%, 0.05% and 0.075% lead acetate). NOS activities in the hippocampus, the cerebral cortex, the cerebellum and the brain stem were determined with fluorescence measurement and levels of mRNA expression of the NMDA receptor 2A (NR2A) subunit and NMDA receptor 2B (NR2B) subunit in the rat hippocampus were measured with Retro-translation (RT-PCR). Results: There were no differences in the body weight of rat pups between any of the groups at any given time (P>0.05). The blood lead level of Pb-exposed rat pups showed a systematic pattern of change: at 14 d of age, it was lower than that at 7 d of age, then rising to the peak level at 21 d and finally falling to lower levels at 28 d. The hippocampal NOS activities of lead-exposed groups were all lower than that of the control group on the 21st and 28th day (P<0.01). NOS activities in the cerebellum of lead-exposed groups were all lower than that of the control group on the 21st and 28th day (P<0.001) and the NOS activity of the 0.025% group was significantly lower than that of the 0.05% and 0.075% groups on the 28th day (P<0.05). NOS activity in the cerebral cortex of the 0.075% group was significantly lower than that of the control, 0.025% and 0.05% groups on the four day spans (P<0.001). There was no significant difference of NOS activity in the brain stem between any lead-exposed group and the control group on the four day spans. In the 0.05% and the 0.075% groups, the level of NR2A mRNA expression was higher than that in the control group at 7 d and 14 d of age (P<0.05). In the 0.025% group, the level of NR2A was found to be higher than that in the control group at 7 d of age only (P<0.05). No significant differences were found for the levels of NR2B mRNA expression between any of the groups at any given time. Conclusions: NOS activity in the hippocampus, the cerebral cortex and the cerebellum are inhibited by lead exposure. The degree of the inhibitory effect depends on the time span of exposure and the lead concentration. Developmental low-level lead exposure was found to raise the level of NR2A mRNA expression in the hippocampus of rats. Developmental low-level lead exposure does not affect the level of NR2B mRNA expression in the hippocampus. 相似文献
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宫颈鳞癌中耐药标志物HSP27和MT的表达及意义 总被引：1，自引：0，他引：1
目的:探讨子宫颈癌变过程中,耐药标志物热休克蛋白27(heat shock protein 27,HSP27)和金属硫蛋白(metallothionein MT)的表达特点,为指导子宫颈癌患者化疗方案制定和提示预后积累资料.方法:集子宫颈切除及活检标本118例,其中有正常宫颈组织13例;子宫颈上皮内瘤变(cervical intraepithelial neoplasia,CIN)25例;子宫颈鳞状细胞癌80例.在鳞癌组中高分化鳞癌13例、中分化鳞癌53例、低分化鳞癌14例.以S-P免疫组织化学方法,显示HSP27和MT的表达水平.结果:染色显示细胞核或细胞浆被染呈大小不一,深浅不等的棕黄色颗粒.HSP27在正常宫颈上皮、CIN和宫颈鳞癌中阳性率分别为7.69%、24.00%和46.25%,三组间差异有统计学意义(P＜0.01).在正常宫颈中MT阳性率为7.69%(1/13),CIN中阳性率为28.00%(7/25),在宫颈鳞癌中阳性率为56.25%(45/80),三者间有显著性差异(P＜0.01).HSP27和MT的阳性表达率在不同分化程度的宫颈鳞癌间无显著差异.结论:HSP27和MT在正常宫颈、宫颈上皮内瘤变、宫颈鳞癌的阳性表达率逐渐升高(P＜0.01).HSP27和MT的过度表达可分别或联合作为临床上早期诊断宫颈癌或判断CIN预后的参考指标. 相似文献
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文章以清洁级纯系雄性SD大鼠为实验模型,应用组织病理学、RT—PCR技术,研究高脂饮食诱发动脉粥样硬化过程中血管内膜细胞大电导钙激活的钾通道（large conductance Ca—activated K＋ channels,BKCa）、中电导钙激活的钾通道（Intermediate condutance Ca—activated K＋ channels,IKCa）基因表达的动态改变情况,从基因表达水平探讨高脂饮食诱发动脉粥样硬化的作用机制。同时指出,IKCa可能为动脉粥样硬化的早期启动因子,此观点有助于动脉粥样硬化的早期检测与防治。 相似文献
20.
Angiogenesis is required for solid tumor growth and facilitates tumor progression and metastasis. The inhibition effects of O-（chloroacetyl-carbamoyl） fumagillol （TNP-470）, an angiogenesis inhibitor, and gemcitabine, a chemotherapeutic agent, on expression of growth factors were investigated using human pulmonary adenocarcinoma cell line, A549. The A549 cells were divided into four groups： control group, 10^-6 mg/ml gemcitabine treated group, 10^-4 mg/ml TNP-470 treated group and gemcitabine＋TNP-470 treated group. The mRNA and protein expression of vascular endothelial growth factor （VEGF） and its receptors, FMS-like tyrosine kinase-l （FLT-1） and kinase insert domain-containing receptor （KDR）, in different groups were measured. The growth of A549 cell cultured with gemcitabine or TNP-470 was inhibited in an almost dose-dependent manner. Although gemcitabine （10^-6 mg/ml） alone and TNP-470 （10^-4 mg/ml） alone had no effect on the mRNA and protein expression of VEGF and its receptors （FLT-1, KDR） in A549 cells compared to the control （P〉0.05）, 10^-6 mg/ml gemcitabine in combination with 10^-4 mg/ml TNP-470 had significant effect （P〈0.01）. Moreover, combination of the two drugs significantly inhibited the mRNA expression of VEGF, FLT-1 and KDR compared to either drug alone （P〈0.05）. This study suggests that combined treatment with TNP-470 plus gemcitabine may augment the antiangiogenic and antineoplastic effects in lung cancer cells in vitro. 相似文献