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1.
瑞芬太尼预处理对大鼠肝脏缺血再灌注损伤的影响及机制   总被引:1,自引:0,他引:1  
Zhao G  Chen ZC  Shen X  Chen YL  Lv Y 《南方医科大学学报》2011,31(12):2016-2020
目的研究瑞芬太尼预处理对大鼠肝脏缺血再灌注损伤的保护作用及其可能的作用机制。方法健康SD大鼠96只,随机分为Sham组(S组)和缺血组,缺血组包括缺血再灌注组(I/R组)、瑞芬太尼预处理组(RPC组)、p38丝裂原活化蛋白激酶(p38MAPK)阻滞剂SB203580(SB)+RPC组。各组分别于再灌注末抽取静脉血、处死大鼠,收集肝组织。观察血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)水平;ELISA法检测血清肿瘤坏死因子α(TNF-α)及IL-1β水平;TUNEL法测定肝细胞凋亡情况;HE染色观察肝组织病理学改变;Western blotting法测定肝组织p38MAPK及其磷酸化组分pp38MAPK的表达水平。结果与S组相比,I/R组血清ALT、AST、TNF-α及IL-1β水平均明显升高,出现明显肝组织损伤,肝细胞凋亡增加;与I/R组相比,RPC组血清ALT、AST、TNF-α及IL-1β水平均明显下降,组织病理学损伤明显减轻,肝细胞凋亡减少,肝组织pp38MAPK表达明显升高;应用p38MAPK阻断剂SB203580,肝损伤加重。结论瑞芬太尼预处理通过激活p38MAPK通路,使p38MAPK磷酸化,减轻炎症因子的产生,对大鼠肝脏缺血再灌注损伤起保护作用。这种保护作用可以被SB 203580阻断。  相似文献   

2.
Lü H  Yang LQ  Yu WF  Li Q  Ren HM  Zhu M  Xu LY 《中华医学杂志》2007,87(35):2468-2471
目的 探讨乳化异氟醚预处理对大鼠肝脏缺血再灌注损伤的保护作用,并且证明这一作用由库普弗(Kupffer)细胞介导。方法 将SD大鼠32只,制成肝脏缺血再灌注损伤模型,随机分为脂肪乳剂对照组(C组)、库普弗细胞阻断对照组(KC组)、乳化异氟醚预处理组(IP组)和库普弗细胞阻断后乳化异氟醚预处理组(IK组),每组8只,观察肝脏缺血30rain再灌注2h后血清中丙氨酸转氨酶(AIJT)、天门冬氨酸转氨酶(AST)、肝细胞匀浆丙二醛(MDA)、超氧化物歧化酶(SOD)和肝组织病理学改变。结果 与C组相比,IP组肝脏缺血再灌注后血清ALT和AST含量显著降低,肝细胞匀浆MDA含量减少,SOD含量增加,肝组织病理学损害明显减轻;而KC组和IK组与C组相比肝脏缺血再灌注后血清ALT和AST含量,肝细胞匀浆MDA、SOD含量,肝组织病理学损害均无明显变化。结论 乳化异氟醚预处理对肝脏缺血再灌注损伤有保护作用,并且这一作用由库普弗细胞介导。  相似文献   

3.
【目的】探讨缺血预处理对大鼠肝缺血再灌注肾损伤的影响及可能机制。【方法】30只SD大鼠,随机分为假手术对照组(Sham组)、肝缺血再灌注组(IR组)和缺血预处理组(IPC组),每组10例。Sham组仅分离肝门区;IR组用无损伤血管夹夹闭门静脉和肝动脉的分支,阻断肝左、中叶血流,缺血40 min,再灌注6 h;IPC组先缺血5 min,再灌注5 min,然后操作同IR组。肝缺血再灌注6 h,断头处死大鼠,于下腔静脉抽取血样并取左肾和左肝。血样离心测定血清谷丙转氨酶(ALT)、谷草转氨酶(AST)、尿素氮(BUN)和肌酐(Cr)的含量。左肾一半制成匀浆,测定肾组织匀浆超氧化物歧化酶(SOD)、丙二醛(MDA)、肿瘤坏死因子-α(TNF-α)和白细胞介素-6(IL-6)的含量,另一半和左肝观察组织病理改变。【结果】与Sham组比较,IR组和IPC组ALT、AST、BUN、Cr、MDA、TNF-α和IL-6含量升高,SOD含量降低(P<0.05),肾组织病理损伤明显;与IR组比较,IPC组ALT、AST、BUN、Cr、MDA、TNF-α和IL-6含量降低,SOD含量升高(P<0.05),肾组织病理损伤减轻。【结论】缺血预处理对肝缺血再灌注导致的肾损伤有保护作用,其保护机制可能与减少氧自由基的释放和抑制炎症反应有关。  相似文献   

4.
目的探讨四君子汤联合缺血预处理(ischemia preconditioning,IPC)对大鼠肝脏缺血再灌注损伤的保护作用及机制。方法将SD大鼠100只随机分成假手术组、空白对照组、四君子汤预处理组、IPC组、四君子汤预处理+IPC组。肝脏缺血再灌注术后检测血清天门冬氨酸氨基转移酶(AST)、丙氨酸氨基转移酶(ALT);检测肝细胞原位凋亡;检测肝组织中丙二醛(MDA)和超氧化物歧化酶(SOD)。结果四君子汤预处理+IPC组ALT和AST水平与空白对照组、四君子汤预处理组、IPC组三组比较,明显降低,差异有统计学意义(P〈0.05)。四君子汤预处理组及IPC组ALT和AST水平与空白对照组比较,明显降低,差异有统计学意义(P〈0.05)。四君子汤预处理组、IPC组、四君子汤预处理+IPC组三组中肝细胞凋亡指数和MDA水平均显著低于空白对照组,差异有统计学意义(P〈0.05)。四君子汤预处理+IPC组中SOD水平显著高于其余四组,差异有统计学意义(P〈0.05)。四君子汤预处理组、IPC组SOD水平显著高于空白对照组,差异有统计学意义(P〈0.05)。结论四君子汤联合IPC,在大鼠肝脏缺血再灌注时减轻过氧化损伤,抑制细胞凋亡,从而起到保护作用。  相似文献   

5.
目的 探讨肢体缺血预处理( LIPC)对肝硬化兔肝缺血再灌注损伤(HIRI)是否有保护作用及其可能的作用机制.方法 建立稳定的新西兰兔肝硬化模型,将28只肝硬化兔随机分为4组,分别为假手术组(Sham 组)、缺血-再灌注组(IR组)、肝脏缺血预处理组(IPC组)、肢体缺血预处理组(LIPC组),每组7只,各组处理结束(再灌注2 h)后取血测肝功能ALT、AST水平,取肝组织测定MDA、SOD的含量.结果 LIPC、IPC组肝硬化兔血清的ALT、AST水平显著低于IR组,差别有统计学意义(P<0.05);且与IR组相比,LIPC、IPC组兔肝组织MDA显著降低(P<0.05),而SOD活性明显增加(P<0.05).LIPC组与IPC组无论是血清ALT、AST水平,还是肝组织MDA、SOD的含量差异均无统计学意义.结论 LIPC能够减轻氧自由基介导的脂质过氧化反应对肝脏的IR损伤,加速自由基的清除,对伴有肝硬化的肝脏IRI也有明显的保护作用.这为伴肝硬化的患者行肝脏手术的围手术期处理中如何减轻术后肝脏IR损伤,加快患者术后肝功能的恢复提供了新的视角.  相似文献   

6.
目的:观察大蒜素对大鼠肝缺血再灌注损伤的保护作用及大蒜素对肝缺血再灌注后肝脏细胞凋亡和p53、bcl-2蛋白的影响。方法:SD大鼠,随机分为假手术组、缺血再灌注组(I/R组)和I/R加大蒜素处理组。肝脏缺血再灌注后,分别观察血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)及乳酸脱氢酶(LDH)丙二醛(MDA)含量和超氧化物歧化酶(SOD)活性的变化;HE染色光镜下观察肝细胞的病理形态学变化;TUNEL染色观察细胞凋亡的情况;免疫组化观察肝组织bcl-2、p53蛋白含量变化。结果:经大蒜素处理后,与缺血再灌注组相比较,血清中ALT、AST、LDH、MDA含量均降低,而SOD活性增高(P<0.05);肝细胞形态学异常改变明显减轻;肝凋亡细胞减少,p53蛋白降低,bcl-2蛋白表达增加。结论:大蒜素可能通过拮抗脂质过氧化反应,清除自由基的生成,调节bcl-2、p53蛋白发挥抗凋亡作用,从而减轻缺血再灌注所造成的肝脏损伤。  相似文献   

7.
七氟烷和异氟烷对肝脏缺血再灌注损伤的影响   总被引:3,自引:0,他引:3  
 【目的】探讨七氟烷和异氟烷预处理对大鼠肝脏缺血再灌注损伤(I/R)的保护作用及机制。【方法】96只SD大鼠随机分为假手术对照组(Sham)、肝脏缺血再灌注组(IR)、七氟烷预处理(Sev)和异氟烷预处理组(Iso),于肝脏缺血30min,再灌注30min、120min测各组大鼠血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、乳酸脱氢酶(LDH)的含量以及肝脏组织中谷胱甘肽(GSH)、丙二醛(MDA)含量和超氧化物歧化酶(SOD)活性。【结果】肝脏缺血再灌注后IR、Sev和Iso组血清ALT、AST和LDH含量均显著升高,肝组织SOD和GSH显著降低,而MDA明显升高,和Sham组相比有显著差异(P<0.01);Sev、Iso组和IR组比较,ALT、AST、LDH和MDA降低,而SOD和GSH显著升高(P<0.05或P<0.01),其中Sev组比Iso组效果更为明显(P<0.05或P<0.01)。【结论】七氟烷和异氟烷对肝脏缺血再灌注损伤有一定的保护作用,这可能与其抑制氧自由基生成,减少脂质过氧化有关。  相似文献   

8.
目的:研究二氮嗪对梗阻性黄疸肝脏的缺血再灌注损伤是否有保护作用。方法:采用胆总管结扎法制作梗阻性黄疸模型,雄性S-D大鼠60只,分5组:缺血再灌注损伤组(对照组),缺血30 min和再灌注120 min:GSH活性氧(清除剂)处理组,缺血再灌注前10 min静脉注射GSH 50 mg/kg;二氮嗪预处理组(A、B、c)缺血再灌注前10 min分别静脉注射1 mg/kg、5 mg/kg、10 mg/kg。结果:与时照组相比,二氮嗪预处理各组血清中ALT、AsT、LDH含量,细胞内MDA含量和SOD活性,肝细胞凋亡指数差异无显著性(P>0.05),而GSH组与对照组相比,各组血清中ALT、AST、LDH含量,细胞内MDA含量和SOD活性,肝细胞凋亡指数差别具有显著性(P<0.05)。结论:二氮嗪预处理对大鼠梗阻性黄疸肝脏缺血30 min再灌注120 min无保护作用,GSH预处理对大鼠梗阻性黄疸肝脏缺血再灌注损伤能提供保护作用。  相似文献   

9.
周军 《中国现代医生》2009,47(18):34-35
目的 探讨复方丹参对兔肝脏热缺血再灌注损伤的保护作用及其相关机制.方法 采用Pringle's肝脏缺血再灌注模型,48只SD大鼠随机分成三组:假手术组(A组),肝脏缺血冉灌注组(B组)和复方丹参预处理组(c组).测定各组缺血30 min(T1)、再灌注120 min(T2)肝功能(ALT、AST)、肝组织的抗氧化能力(SOD)、脂质过氧化产物丙二醛(MAD)含量、肝指数(湿重/干重%),比较肝组织形态学改变.结果 (1)T1、T2相,B、C组与A组比较肝组织损害重:ALT、AST均升高(P<0.05);肝组织匀浆SOD含量降低;MDA含量升高(P<0.05);肝脏水肿程度上升(P<0.05);肝组织出现不同程度的病理学改变.2)在T1、T2相,C组与B组比较肝组织损害轻:ALT、AST均较低(P<0.05);肝组织匀浆SOD含量高,MDA含量减少(P<0.05);肝脏水肿程度较轻(P<0.05);肝组织出现较轻的病理学改变.结论 复方丹参通过改善肝脏微循环状况,改善缺血肝脏组织的能量代谢,提高肝组织抗氧化能力,减少肝脏细胞的变性坏死程度而对肝脏热缺血再灌注起保护作用.  相似文献   

10.
目的:研究二氮嗪对梗阻性黄疸肝脏的缺血再灌注损伤是否有保护作用。方法:采用胆总管结扎法制作梗阻性黄疸模型,雄性S—D大鼠60只,分5组:缺血再灌注损伤组(对照组),缺血30min和再灌注120min;GSH活性氧(清除剂)处理组,缺血再灌注前10min静脉注射GSH50mg/kg;二氮嗪预处理组(A、B、C)缺血再灌注前10min分别静脉注射1mg/kg、5mg/kg、10mg/kg。结果:与对照组相比,二氮嗪预处理各组血清中ALT、AST、LDH含量,细胞内MDA含量和SOD活性,肝细胞凋亡指数差异无显著性(P〉0.05),而GSH组与对照组相比,各组血清中ALT、AST、LDH含量,细胞内MDA含量和SOD活性,肝细胞凋亡指数差别具有显著性(P〈0.05)。结论:二氮嗪预处理对大鼠梗阻性黄疸肝脏缺血30min再灌注120min无保护作用,GSH预处理对大鼠梗阻性黄疸肝脏缺血再灌注损伤能/提供保护作用。  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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