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1.
目的 探讨硫化氢(H2S)对大鼠急性百草枯(PQ)中毒肺过氧化损伤的影响.方法 30只SD大鼠分成对照组、模型组、治疗组.模型组、治疗组采用PQ(80mg/kg)灌胃染毒,模型组染毒后腹腔注射生理盐水,治疗组染毒后,腹腔注射NaHS(1.4 μmol/kg),2次/d;对照组采用生理盐水灌胃,灌胃后腹腔注射生理盐水.72 h后,观察肺组织病理改变;计算肺湿/千质量比值(W/D);测定肺组织匀浆内丙二醛(MDA)水平、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活力.结果 模型组肺组织损伤明显,治疗组较模型组减轻;模型组肺W/D较对照组增高(P<0.05),治疗组较模型组降低(P<0.05);模型组MDA高于对照组(P<0.05),SOD、GSH-Px低于对照组(P<0.05);治疗组中MDA较模型组降低(P<0.05),SOD、GSH-Px较模型组升高(P<0.05).结论 H2S对急性PQ中毒大鼠肺过氧化损伤具有一定的保护作用.  相似文献   

2.
生脉注射液对百草枯中毒大鼠急性肺损伤的保护作用   总被引:1,自引:0,他引:1  
目的 探讨生脉注射液对急性百草枯中毒大鼠所致肺损伤(ALI)的保护作用.方法 将50只SD大鼠随机分成5组,空白组、阴性对照组、阳性对照组、生脉低剂量组和生脉高剂量组.观察大体标本,组织病理以及生物学标志:肺湿/干重比、肺泡灌洗液(BALF)中性粒细胞比和蛋白含量.同时测定血清和BALF中MDA含量、SOD和GSH-Px活力,以及肺组织核因子-κB和iNOS活性.结果 与阴性对照组相比,生脉低剂量组肺组织病理显示肺淤血、肺水肿明显减轻;而且血浆和BALF中MDA含量下降,差异有显著性(P<0.01);GSH-Px和SOD活力升高,差异有显著性(P<0.01);核因子-κB和iNOS降低(★P<0.05,★★P<0.01). 结论 急性百草枯中毒可以引起肺组织脂质过氧化损害,而且核因子-κB及iNOS在百草枯所致肺损伤中起重要作用.生脉注射液可使急性百草枯中毒引起的脂质过氧化损害得到改善,并且能降低核因子-κB及iNOS水平,减轻百草枯中毒大鼠肺组织损伤.  相似文献   

3.
目的 探讨槲皮素对百草枯所致急性肺损伤的治疗作用。方法 雄性SD大鼠45只随机分为对照组(5只)、百草枯组(20只)和槲皮素组(20只),后两组均再分为8,24,48和72 h四个小组(每组5只)。百草枯组和槲皮素组大鼠腹腔注射百草枯(50 mg/kg),槲皮素组在百草枯注射后3 h再腹腔注射槲皮素(100 mg/kg)。分别测定百草枯中毒后8,24,48,72 h大鼠血浆和支气管肺泡灌洗液(BALF)中丙二醛(MDA)含量、超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GSH-Px)的活力,并观察肺组织结构改变,测定肺组织湿/干重比(W/D),采用免疫组化方法测定肺组织核转录因子κB(NF-κB)p65的表达。结果 与对照组比较,百草枯组血浆及BALF中MDA含量均显著升高;血浆中SOD活力呈下降趋势,24 h后明显下降;GSH-Px活力呈增加趋势,在48 h后明显升高;BALF中SOD、GSH-Px活力均下降,但48 h后SOD活力显著升高。槲皮素组与百草枯组比较,血浆和BALF中MDA含量下降,GSH-Px和SOD活力升高。百草枯组肺泡壁充血、增厚,炎症细胞浸润,并有局灶性出血;槲皮素组肺泡壁充血、出血均有减轻。槲皮素组肺组织NF-κB p65的表达及W/D值较百草枯组明显下降。结论 槲皮素对百草枯诱导的急性肺损伤具有治疗作用。  相似文献   

4.
钙稳态失衡在百草枯中毒肺损伤中的作用   总被引:3,自引:0,他引:3  
目的检测肺组织的细胞内钙离子浓度变化,探讨胞内钙稳态失衡在百草枯中毒肺损伤中的作用.方法取SD大鼠42只,分3组,1组一次性腹腔内注入百草枯20mg/kg,另1组加用金属离子螯合剂EDTA,第3组使用生理盐水,观察在6个不同时间点肺组织的细胞内钙离子浓度变化,及肺损伤程度.结果发现肺组织细胞的胞浆内钙离子浓度明显升高,与阴性组相比,钙离子荧光强度为(82.91±28.68)vs(55.42±29.61),差异有显著性(P<0.01);且有时间点的区别,以第2~4天明显.给予EDTA后,肺泡壁充血、出血均有减轻.结论百草枯中毒肺损伤机制可能与联吡啶阳离子产生胞内钙稳态失衡有关,最终导致不可逆的肺间质纤维化.  相似文献   

5.
目的探讨血必净注射液对大鼠百草枯(PQ)中毒急性肺损伤(ALI)的保护作用及其机制。方法SD大鼠60只,随机分为对照组、百草枯组和血必净组,每组30只。百草枯组和血必净组大鼠腹腔内注射百草枯,对照组注射等体积无菌生理盐水,血必净组同时给予血必净治疗。3d后测支气管肺组织NF-κB活性细胞、支气管肺泡灌洗液(BALF)中炎症细胞、中性粒细胞弹性蛋白酶(NE)活性和肺叶湿/干重比。结果百草枯组和血必净组支气管肺组织NF-κB活性细胞、支气管肺泡灌洗液中总细胞数、中性粒细胞数、巨噬细胞数、BALF-NE和肺叶湿/干重比均较对照组增高,差异有统计学意义(P<0.05),血必净组各指标明显低于百草枯组,差异有统计学意义(P<0.05)。结论血必净可抑制NF-κB及炎性细胞活性,对百草枯中毒大鼠急性肺损伤有治疗作用。  相似文献   

6.
目的观察百草枯中毒大鼠血浆和肺组织匀浆中的IL-17A的动态变化,探讨大鼠百草枯中毒肺损伤的机制。方法将雄性SD大鼠24只随机分成百草枯中毒模型组和生理盐水对照组,分别给予20 mg/kg百草枯或等体积生理盐水1次性灌胃染毒,并在给药后7 d和14 d处死大鼠,观察其肺的病理变化。肺组织匀浆和血浆中IL-17A的含量。结果百草枯中毒后大鼠肺部病理切片表现为肺泡炎,肺纤维化等不同程度的肺损伤改变。血浆和组织匀浆中IL-17A在中毒后与对照组大鼠比较明显升高,并随时间变化,比较差异有统计学意义(P<0.05)。结论在百草枯中毒肺损伤中,IL-17A可能发挥了重要作用。  相似文献   

7.
目的 自由基清除剂依达拉奉(Edaravone)在临床用于治疗急性脑梗死,其抗氧化作用亦可保护肺损伤.文中研究探讨依达拉奉对急性百草枯(Paraquat, PQ)中毒致大鼠肺损伤的保护作用.方法 72只SD大鼠随机分为空白对照组、染毒组和依达拉奉治疗组.空白对照组:8只,一次性给予与染毒组等量的等渗盐水;染毒组:32只,一次性腹腔注射百草枯溶液18mg/kg,染毒后不进行任何治疗;依达拉奉治疗组:32只,PQ染毒后即刻给予依达拉奉腹腔注射6mg/kg,1次/d,连续7d,每组按1、3、5和7d分为4个观察时段,测定不同时段大鼠肺组织匀浆与支气管肺泡灌洗液(bronchoalveolar lavage fluid, BALF)中丙二醛(malondialdehyde,MDA)含量、超氧化物歧化酶(superoxide dismutase, SOD)活力和组织匀浆中谷胱甘肽过氧化物酶(glutathione peroxidase, GSH-PX)活力,以及肺组织匀浆和支气管肺泡灌洗液中的白细胞介素-6(interleukin, IL-6)、肿瘤坏死因子(tumor necrosis factor, TNF-α)的含量,并观察3组大鼠的肺损伤表现及光镜下肺组织的病理学改变.结果 染毒组各时段的大鼠肺组织匀浆和BALF中的MDA含量较空白对照组明显升高,SOD、GSH-PX活力下降,差异有统计学意义(P<0.01);肺组织匀浆和BALF中的IL-6、TNF-α均较空白对照组明显升高,差异有统计学意义(P<0.05或P<0.01).依达拉奉治疗组与染毒组比较,各时段大鼠肺组织匀浆和BALF中MDA含量下降,SOD活力升高,差异有统计学意义(P<0.05或P<0.01);BALF中的GSH-PX升高,差异有统计学意义(P<0.05或P<0.01);肺组织匀浆和BALF中的IL-6、TNF-α的含量也有不同程度降低,差异有统计学意义(P<0.05或P<0.01).依达拉奉治疗后光镜下肺损伤的表现较染毒组减轻,未观察到早期纤维化改变.结论 依达拉奉是一种新型的自由基清除剂,能减轻百草枯中毒后氧自由基损伤,抑制脂质过氧化反应,降低肺损伤早期的炎症介质水平,改善百草枯中毒后所引起的弥漫性肺损伤,可能成为一种新的治疗急性PQ中毒的药物.  相似文献   

8.
邢雁彬 《基层医学论坛》2013,(31):4152-4153
目的探讨激动剂激活Nrf2/ARE信号通路在百草枯中毒后对肾脏氧化应激反应的影响。方法建立百草枯中毒大鼠动物模型,分为生理盐水对照组,激活剂(叔丁基对苯二酚tBHQ)干预组和正常对照组,研究不同组大鼠相关指标变化情况。结果百草枯中毒后生理盐水对照组血尿素氮(BUN)、24h尿蛋白量、血清及肾组织匀浆丙二醛(MDA)浓度明显高于正常对照组,实施激动剂干预组大鼠血BUN、24h尿蛋白量及血清及肾组织匀浆MDA浓度明显较生理盐水对照组降低,生存时间延长(P〈O.01)。结论百草枯中毒后Nrf2激动剂tBHQ干预能够明显延长实验动物的存活时间,增强机体细胞内源性抗氧化活性,减轻中毒后的肾脏损伤,为百草枯中毒性肾脏损伤的防治提供了新的思路与科学的理论依据。  相似文献   

9.
目的:探讨急性肺损伤(ALI)大鼠模型超氧化物歧化酶(SOD)和丙二醛(MDA)的变化及氨溴索对ALI的保护作用。方法:将36只Wistar大鼠随机分成对照组、油酸模型组、氨溴索组3组。氨溴索组在注入油酸前30min腹腔内注入氨溴索50mg/kg。以上各组均在注油酸后4h采血测SOD,观察肺组织病理形态学变化,测定肺匀浆中MDA。结果:氨溴索组血清SOD含量2586±279KU/L与模型组血清SOD含量1898+256KU/L比较明显增高(P〈0.01);氨溴索组肺匀浆MDA含量(5.9±0.6nmol/m1)与模型组肺匀浆MDA(8.7±0.9nmol/m1)比较明显降低(P〈0.01)。病理组织学观察示氨溴索组肺组织病理改变较模型组减轻。结论:氨溴索对油酸致ALI大鼠模型有保护作用,这种保护作用可能与其抗氧化反应有关。  相似文献   

10.
目的:察丹芍化纤对肺纤维化大鼠肺组织匀浆中超氧化物歧化酶(Superoxide Dismutase,SOD)、的活性和丙二醛(Maleic Dialdehyde,MDA)含量的影响。方法:SD大鼠30只,随机分为正常对照组(对照组)、肺纤维化模型组(模型组)和丹芍化纤胶囊治疗组(治疗组)。模型组乖治疗组气管内注射博来霉素5mg/kg诱导肺纤维化,对照组气管内注射等量生理盐水。次日起治疗组大鼠给予丹芍化纤混悬液0.8g/(kg·d)灌胃,其余两组给予等量生理盐水灌胃。治疗第28d处死各组大鼠,取肺组织行病理学观察、肺系数测定、肺组织羟脯氨酸含量、超氧化物歧化酶(SOD)活性及丙二醛(MDA)含量检测。结果:①与对照组比较,肺纤组大鼠肺系数、肺组织Hyp含量明显升高;肺泡炎症、肺纤维化程度明显;MDA含量明显升高,而SOD酶活性明显降低。②与模型组比较,丹芍化纤胶囊预防性治疗组大鼠肺系数、肺组织Hyp含量明显降低;肺泡炎症、肺纤维化程度均有所改善;MDA含量明显降低,但仍较正常组高;SOD酶活性明显回升,但未恢复正常水平。结论:丹芍化纤具有较好的抗大鼠肺纤维化作用,其作用机制部分是通过抗氧化作用抑制肺纤维化的发展,对肺纤维化有预防性治疗作用。  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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