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1.
【目的】探索硒诱导金属硫蛋白及其对大鼠肝纤维化防护作用的蛋白质指纹图谱改变。【方法】利用表面增强的激光解析离子化-飞行时间-质谱(SELDI-TOF-MS)技术测定硒对金属硫蛋白的诱导,寻找大鼠肝纤维化的异常蛋白表达标志并评估硒代金属硫蛋白的防护作用。【结果】IMAC-Cu蛋白质芯片6279 Da和6650Da处特征性MT蛋白质表达增强证实硒对MT的高诱导作用;肝组织点样的WCX2芯片5 140Da综合峰的两峰与正常组相对应处比较明显倒置,血清点样的H4芯片7 105 Da左右的蛋白质出现高表达,4 820Da左右的蛋白质表达受抑,三种图谱变化是大鼠酒精性肝纤维化的相关信号蛋白;硒诱导MT增高后上述异常表达均有改善,说明有机硒对肝纤维化有防护作用。【结论】组织和血清的蛋白质指纹图谱可以作为肝纤维化疗效监测和评价的一类标志物,为今后进行更多的药物或方法筛选奠定了一种可以尝试的试验模式。  相似文献   

2.
高脂饲料和酒精诱导大鼠肝纤维化的实验研究   总被引:2,自引:0,他引:2  
目的:探讨高脂饮食与酒精对肝纤维化的形成机制,寻求新的肝纤维化动物模型。方法:采用高脂饲料喂养,同时灌服白酒,持续时间3个月,建立大鼠高脂酒精性肝纤维化模型。结果:肝脏羟脯氨酸(HYP)、丙二醛(MDA)含量较正常组显著升高,谷胱甘肽(GSH)、金属硫蛋白(MT)含量降低,模型组肝细胞呈现出不同程度纤维化变性,伴局灶性肝细胞坏死和炎症细胞浸润。结论:给予大鼠高脂饮食和酒精可以建立肝纤维化动物模型。  相似文献   

3.
大鼠酒精性肝纤维化复合模型的建立   总被引:11,自引:2,他引:11  
目的:采用复合因素制备大鼠酒精性肝纤维化模型。方法:Wistar雄性大鼠随机分为空白对照组、酒精性肝纤维化模型组和微量CCl4处理组。酒精性肝纤维化模型组大鼠予以喂食酒精、玉米油、吡唑,结合微量CCl4腹腔注射造模。微量CCl4处理组仅予以微量CCl4腹腔注射。观察各组大鼠血清丙氨酸氨基转移酶(alanine aminotransferase,ALT)、天门冬氨酸氨基转移酶(aspartate aminotransferase,AST)、γ谷氨酰转肽酶(gamma-glutamyltransferase,γ-GT)水平和肝组织病理学的变化。结果:造模第12周,成功建立大鼠酒精性肝纤维化模型。在造模期间,肝脏组织病理学依次表现为酒精性脂肪肝、肝炎、肝纤维化。酒精性肝纤维化模型组大鼠肝/体比值,血清ALT、AST及γ-GT水平与正常对照组比较,差异均有统计学意义。结论:酒精灌胃结合微量CCl4腹腔注射制备酒精性肝纤维化动物模型,具有模型稳定、成功率高的特点,并可提供不同阶段酒精性肝病的实验模型。  相似文献   

4.
目的 观察抗纤复方Ⅰ号对酒精性肝病大鼠脂质过氧化产物的影响.方法 90只大鼠随机分为正常组、酒精组和中药组.酒精组采用乙醇灌胃法制备酒精性肝病大鼠模型,中药组预防性给予抗纤复方Ⅰ号水煎剂灌胃,共12 W.实验4、8、12 W末HE染色观察肝脏组织学改变,同时应用TBA比色法检测肝组织内丙二醛(MDA)含量,羟胺法检测超氧化物歧化酶(SOD)含量.结果 与酒精组相比,中药组大鼠肝细胞脂肪变性、坏死明显减轻,无纤维化形成.酒精组MDA含量随乙醇摄入量的增加而进行性升高,与正常组及中药组比较差异显著(P<0.05).酒精组和中药组SOD活性在实验4 W末均有升高,但随着实验进程,酒精组SOD活性进行性下降(P<0.05),而中药组仍维持较高水平,与酒精组比较差异显著(P<0.05).结论 抗纤复方Ⅰ号能够抑制脂质过氧化反应从而阻止酒精性肝纤维化的形成.  相似文献   

5.
目的:探讨调肝理脾方对实验性酒精性肝纤维化模型大鼠的抑制作用及作用机制。方法:Wistar雄性大鼠以"白酒-吡唑-玉米油"混合液灌胃16周制备酒精性肝纤维化模型,将存活大鼠随机分成4组:模型组、中药(调肝理脾方)治疗组、西药(安珐特)对照组和中药(复方鳖甲软肝片)对照组,另设正常组,分别给予相应药物和生理盐水。4周后,经HE染色、Mallory染色和转化生长因子-β1(TGF-β1)蛋白表达免疫组化染色,光镜观察大鼠肝组织病理学变化。结果:调肝理脾方能显著降低大鼠肝组织纤维化程度,下调大鼠肝组织中TGF-β1蛋白含量。结论:病理学实验研究证实调肝理脾方能有效阻止和逆转酒精性肝纤维化的进程。  相似文献   

6.
目的 探讨枳椇子提取物联合还原型谷胱甘肽片对大鼠酒精性肝纤维化的作用.方法 以无水酒精等药物灌胃,建立大鼠肝纤维化模型,造模后单用及合用枳椇子提取物和还原型谷胱甘肽片.检测大鼠血清透明质酸(HA)、层粘蛋白(LN)、Ⅲ型前胶原氨基末端肽、Ⅳ型胶原水平并行肝组织病理检查.结果 枳椇子和还原型谷胱甘肽片合用组对酒精性肝损害大鼠血4项指标和肝组织变性、炎症浸润及纤维增生的改善明显优于模型组和单用组.结论 枳椇子联合还原型谷胱甘肽片在保护大鼠肝细胞、减缓肝纤维化进展方面有一定作用.  相似文献   

7.
酒精复合性肝纤维化大鼠模型的建立及动态观察   总被引:1,自引:0,他引:1  
目的 建立大鼠酒精复合性肝纤维化动物模型,观察肝纤维化的动态病变情况.方法 雄性SD大鼠随机分成对照组、酒精性肝纤维化模型组.模型组大鼠灌胃酒精、橄榄油、吡唑的混悬液,并间断饲喂高脂饲料,结合微量CCl4腹腔注射的复合方式造模.分别于2、4、6、8周时检测造模大鼠血清丙氨酸转氨酶(ALT)、天冬氨酸转氨酶(AST)、胆固醇(TC)、甘油三酯(TG)水平,并根据肝脏病理切片分析肝脏纤维化病变程度.结果 在造模2周末,肝细胞轻、中度脂肪变:4周末,重度脂肪肝,轻度的纤维组织增生;6周末,肝细胞严重脂变,纤维隔形成,中度界面肝炎;8周末,多个假小体形成,达早期肝硬化程度.模型组大鼠的体重、血清ALT、AST、TG、TC水平与对照组比较,差异均有统计学意义.结论 运用酒精灌胃为主的复合方式造模,8周内可建立形成不同程度(酒精性脂肪肝、肝炎、肝纤维化)的酒精性肝纤维化的动物模型.该模型可靠且复制时间短,肝纤维化进展稳定.  相似文献   

8.
目的:研究黄芩茎叶总黄酮(SSTF)对大鼠纤维化肝脏转化生长因子β1(TGF-β1)表达的影响.方法:30只大鼠随机分为正常组、模型组、SSTF保护组,采用CCL4皮下注射制备大鼠慢性肝纤维化模型,SSTF保护组大鼠在造模的同时给予SSTF灌胃.检测各组大鼠血清丙氨酸氨基转移酶(ALT)活性和肝组织羟脯氨酸(Hyp)的含量,免疫组化法检测肝组织TGF-β1的表达,HE染色和Van-Gieson染色观察肝组织病理形态学的改变.结果:SSTF保护组肝纤维化程度显著低于模型组,血清ALT活性和肝组织Hyp含量明显减少(P<0.01);肝纤维化模型大鼠肝组织中TGF-β1呈强阳性表达,给予SSTF后肝组织中TGF-β1的表达明显降低.结论:SSTF能有效减轻大鼠肝脏损伤和肝纤维化的形成,其机理可能是通过抑制TGF-β1在肝内的表达,从而抑制了细胞外基质在肝脏的分泌和沉积,达到抗肝纤维化作用.  相似文献   

9.
[目的]研究葛根素对大鼠酒精性肝纤维化的干预作用以及对肝星状细胞增殖活化的影响。[方法]Wistar雄性大鼠85只被随机分为正常对照、模型、葛根素低、中、高剂量和阳性药(易善复)对照6组。除正常对照组之外,其余给予大鼠灌胃白酒辅以玉米油、吡唑的混合食料制备酒精性肝纤维化模型,12周后采用苏木精-伊红(HE)、Masson染色观察大鼠肝脏组织纤维化状况。采用免疫组化法检测大鼠肝组织内增殖细胞核抗原(PCNA)、α-平滑肌肌动蛋白(α-SMA)的表达,根据PCNA的表达,计算肝细胞的增殖指数。[结果]模型组和各给药组肝纤维化程度显著高于正常对照组,各给药组肝纤维化程度要轻于模型组,但低剂量组肝纤维化程度重于其他各给药组。模型组肝细胞增殖指数明显高于其他各组,各给药组肝细胞增殖指数高于正常组。模型组α-SMA的表达高于其他各组,葛根素中、高剂量组和阳性药组α-SMA的表达低于模型组,葛根素低剂量组α-SMA的表达与模型组没有显著性差异,但从数据趋势上看低于模型组。[结论]葛根素能通过抑制肝星状细胞的增殖活化从而达到防治酒精性肝纤维化的功效,以中、高剂量效果更明显。  相似文献   

10.
《延边医学院学报》2019,(4):238-242
[目的]探讨糜酶抑制剂(Chy-I)对肝纤维化模型大鼠肝组织病理改变及血管紧张素Ⅱ(AngⅡ)、转化生长因子β1(TGF-β1)表达的影响及其机制.[方法]取雄性Wistar大鼠,随机分为正常组、模型组和Chy-I组,模型组和Chy-I组利用四氯化碳制作肝纤维化大鼠模型,Chy-I组在建立模型的同时灌胃给予Chy-I,剂量为每日10 mg/kg.实验第56 d时采用HE染色法观察各组肝组织病理学改变,利用免疫组织化学染色法检测肝组织中AngⅡ,TGF-β1阳性细胞数,Western blot法测定各组肝组织中AngⅡ,TGF-β1蛋白表达水平.[结果]与模型组比较,Chy-I组肝纤维化明显减轻,AngⅡ,TGF-β1阳性细胞表达明显减少(P<0.01),肝组织中AngⅡ,TGF-β1蛋白表达水平明显下调(P<0.05).[结论] Chy-I对肝纤维化大鼠具有预防与治疗作用,其机制认为可能与调节AngⅡ,TGF-β1水平、抑制肝纤维化有关系.  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.
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   

13.
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   

14.
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   

15.
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   

16.
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   

17.
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   

18.
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   

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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