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1.
张军  胡大海  折涛  刘佳琦  张战凤 《医学争鸣》2008,29(20):1911-1914
目的:研究早期应用褪黑素对于深Ⅱ度烫伤大鼠的抗氧化和抗炎的作用.方法:雄性sD大鼠30只,分为假烫组,烫伤组和烫伤 褪黑素治疗组(治疗组)每组10只动物.烫伤组和治疗组大鼠在背部造成30%体表总面积(TBSA)的深Ⅱ度烫伤,烫伤组和治疗组伤后平衡盐补液治疗.治疗组分别于伤后1 min,6 h,以10 mg/kg的剂量给予腹腔注射褪黑素溶液.各组于12 h采集血清标本检测丙二醛(MDA)、还原型谷胱甘肽(GSH)等反映自由基水平的指标;用ELISA方法检测TNF-α,IL-1β等炎症因子指标.于伤后12 h采集烫伤皮肤组织,用TUNEL和cagpase-3免疫组织化学检测残留毛囊细胞的凋亡情况.结果:与假烫组比较,烫伤组伤后12 h血清MDA显著升高,GSH明显下降;TNF-α,IL-1β含量显著增加(P<0.01).与烫伤组比较,治疗组12 h血清MDA含量降低了34%;GSH增加了37%;TNF-α下降了29%;IL-1β降低了35%(P<0.05).TUNEL显示烫伤组伤后12 h残留毛囊凋亡细胞率为(30.9±2.5)%,高于假烫组的(3.8±1.9)%,(P<0.01).而治疗组的毛囊凋亡细胞率降低为(20.2±2.4)%,低于烫伤组(P<0.05).caspase-3免疫组织化学显示了相似的凋亡趋势.结论:深Ⅱ度烫伤大鼠早期应用褪黑素,可以改善机体氧化应激水平、降低炎症反应进而具有保护毛囊细胞的作用.  相似文献   

2.
目的观察丙酮酸钠对烫伤休克大鼠肾通透性的影响。方法采用50%TBSAⅢ度烫伤大鼠模型,大鼠随机分为假烫组、烫伤组、氯化钠组和丙酮酸钠组,每组6只。应用伊文斯蓝法测定伤后4h肾组织通透性及含水量的变化,检测血肌酐(Cr)及血细胞压积(HCT)变化。结果烫伤后4h单纯烫伤组,氯化钠组肾伊文斯兰含量、Cr、HCT及含水量较假烫组明显增加(P〈0.05),丙酮酸钠组伊文斯兰含量、Cr、HCT及含水量较单纯烫伤组、氯化钠组明显降低(P〈0.05),而与假烫组无明显统计学差异。结论丙酮酸钠能明显减轻烧伤早期血管通透性的增加,有助于烧伤后休克及并发症的防治。  相似文献   

3.
目的 观察富氢林格液(富氢液)对延迟复苏严重烧伤大鼠肠组织的保护作用.方法 制备富氢液,采用随机数字表法将36只SD大鼠随机分为3组(每组12只),即假烫组、烫伤十普通林格液组和烫伤十富氢液组,在后两组大鼠背部造成占体表面积(TBSA) 30%的Ⅲ度烫伤,并于烫伤后7h、9h、17h,分别经腹腔补给相当于总补液体积1/2、1/4、1/4的普通林格液或富氢液,假烫组不补液.24 h后取小肠组织做H-E染色,观察病理变化,并检测肠组织中丙二醛(MDA)含量和髓过氧化物酶(MPO)、超氧化物歧化酶(SOD)活性,以及促炎细胞因子IL-1β和TNF-α的含量.结果 相对于普通林格液组,富氢液组小肠黏膜损伤减轻,肠组织MDA含量(P<0.05)及MPO和SOD活性均降低(P<0.01);促炎细胞因子IL-1β和TNF-α含量在富氢液组均显著低于普通林格液组(P<0.01).结论 富氢液对烧伤延迟复苏后肠组织具有保护作用,可能主要从两方面体现:一是降低大面积烧伤及延迟复苏所带来的氧化损伤;二是抑制延迟复苏大鼠肠组织促炎因子IL-1β和TNF-α的生成.  相似文献   

4.
目的探讨烫伤大鼠肾组织高迁移率族蛋白B1(HMGB1)表达的变化规律,并观察血必净注射液(简称血必净)对烫伤大鼠肾脏HMGB1及急性肾损伤的可能干预效果。方法采用大鼠30%总体表面积Ⅲ度烫伤模型,78只动物随机分为假伤组(n=18)、烫伤组(n=30)和血必净组(n=30),分别于伤后8、24、72h活杀取材。采用逆转录聚合酶链反应检测肾组织HMGB1mRNA表达、蛋白免疫印迹及免疫组织化学法检测肾组织HMGB1蛋白表达;同时用全自动生化分析仪测定血清肌酐(Cr)水平,采用苏木素-伊红(HE)染色、光镜下观察肾组织病理改变。结果与假伤组比较,烫伤组肾组织HMGB1基因和蛋白表达于伤后8、24、72h显著增强(P<0.05,P<0.01),血清Cr水平于伤后24、72h显著增高(P<0.05,P<0.01)。给予血必净治疗后24、72h动物肾组织HMGB1基因和蛋白表达均显著抑制(P<0.05,P<0.01),血清Cr水平亦显著降低(P<0.05)。光镜下观察烫伤组肾组织大量炎细胞浸润,其中以24h最重,血必净组24、72h病理形态改变则明显减轻。结论HMGB1作为晚期炎症因子参与严重烫伤后肾脏炎症反应及组织损害的病理生理过程,血必净治疗可显著下调肾组织HMGB1合成与释放,并减轻烫伤所致急性肾损伤。  相似文献   

5.
目的 炎性反应烫伤后脑损伤过程中发挥重要作用,观察严重烫伤后大鼠不同时间的脑组织炎性细胞因子、核因子-kappa B(nuclear factor-kappa B, NF-κB)和胶质细胞原纤维酸性蛋白(glial fibrillary acidic protein, GFAP)的变化,探讨已酮可可碱(pentoxifytlline, PTX)对严重烫伤后脑的保护作用.方法 成年雄性Wistar大鼠78只,随机分为对照组(n=6),烫伤组(n=36),烫伤+PTX治疗组(n=36).水烫法建立40%全身体表面积(total body surface area, TBSA)烫伤模型,烫伤组大鼠于烫伤15min后静脉输注等渗盐水10ml/kg,烫伤+PTX治疗组大鼠于烫伤15min后静脉输注给予PTX 50mg/kg,2组于烫伤0.5,1,2,4,8,16h后处死动物,每个时间点取6只大鼠测定脑肿瘤坏死因子-α(tumor necrosis factor-alpha, TNF-α)、白细胞介素-6(interleukin-6, IL-6) 和白细胞介素-10(interleukin-10, IL-10)的水平,16h测定NF-κB和GFAP表达.对照组于37℃水假烫15min后静脉输注等渗盐水10ml/kg,16h处死,测定上述指标.凝胶电迁移法(electrophoretic mobility shift assay,EMSA)测定脑组织NF-κB的活性,酶联免疫吸附法(enzyme linked immunosorbance assay,ELISA)测定TNF-α、IL-6和IL-10的水平,Western blot测定脑GFAP水平.结果 与对照组相比,烫伤组大鼠脑组织的NF-κB和GFAP的表达显著增强(P<0.01),TNF-α、IL-6和IL-10水平显著增高(P<0.01).与烫伤组相比,烫伤+PTX治疗组脑组织NF-κB和GFAP的表达减弱(P<0.01)、 TNF-α和IL-6的水平降低(P<0.01),但仍高于对照组(P<0.01).烫伤+PTX治疗组IL-10水平没有降低,反而显著增高于烫伤组(P<0.01).结论 早期给予PTX对严重烫伤后大鼠继发性脑损伤有保护作用.  相似文献   

6.
大剂量维生素C对外周血细胞活性的影响   总被引:3,自引:0,他引:3  
目的 观察大剂量维生素C(VC)对外周血淋巴细胞增殖活性、抗DNA氧化损伤能力以及红细胞膜流动性的影响.方法 将48只Wistar大鼠随机分为对照组、A、B、C共4组,分别给予含VC为0、2 000、5 000、10 000 mg/kg的饲料,实验期为8周.实验结束后无痛处死动物并取血,测定血浆VC、超氧化物歧化酶(SOD)和丙二醛(MDA)含量,红细胞膜谷胱甘肽过氧化物酶(GSH-Px)活性、红细胞膜流动性、淋巴细胞增殖活性,单细胞凝胶电泳计数彗星细胞测量DNA氧化损伤水平.结果 与对照组比较,A组血浆SOD活性明显增高(F=2.987,q=4.24,P<0.05),血浆MDA含量明显降低(F=4.176,q=4.23,P<0.05),红细胞膜流动性和外周血淋巴细胞增殖活性均明显增高(F=2.278~2.763,q=3.67-3.84,P<0.05);C组的血浆VC含量明显升高(F=3.235,q=4.63,P<0.01),SOD和红细胞膜GSH-Px活性明显降低(F=2.987、3.478,q=3.68~4.13,P均<0.05),MDA含量明显增高(q=4.08,P<0.05).10 μmol/L H2O2诱发DNA损伤B组和C组较对照组均加重(F=4.137,q=3.94、4.25,P<0.05).结论 较高剂量VC(2 000 mg/kg)可明显增高大鼠机体的抗氧化损伤水平,改善红细胞膜流动性,提高淋巴细胞的增殖活性;当VC剂量超过5 000 mg/kg时,反而会加重淋巴细胞的DNA氧化损伤.  相似文献   

7.
目的:定量分析静脉吸毒人群HIV感染者CD3~ CD4~ CD8~ T淋巴细胞水平。方法:采用流式细胞技术(FCM)对76例无症状HIV阳性的静脉吸毒者,165例HIV阴性的静脉吸毒者及61例正常对照组分别检测CD3~ 、CD4~ 、CD8~ 淋巴细胞绝对计数和CD4~ /CD8~ 比值。结果:HIV感染组与静脉吸毒组及健康对照组各项指标间存在有不同程度的统计学差异性(F=105.02,F=159.13,F=220.08,P<0.01=;CD4~ 细胞计数和CD4~ /CD8~ 比值表现为HIV感染组<静脉吸毒组<健康对照组(q=18.4,q=24.6,q=11.1,q=51.8,q=56.7,q=13.3,P<0.01),CD3~ 细胞计数呈现为HIV感染组>健康对照组>静脉吸毒组(q=19.8,q=6.5,q=10.8,P<0.01),CD8~ 细胞计数表现为HIV感染组>静脉吸毒组>健康对照组(q=27.2,q=24.9,P<0.01;q=3.48,P<0.05)。结论:HIV感染和/或静脉吸毒均可不同程度的导致CD4 和CD8 细胞水平的改变,有关静脉吸毒合并HIV感染对免疫细胞水平的影响尚需进一步深入研究。  相似文献   

8.
羧乙基锗倍半氧化物对大鼠肺缺血再灌注损伤的保护作用   总被引:2,自引:0,他引:2  
①目的 观察羧乙基锗倍半氧化物 (CGS)对大鼠实验性肺缺血再灌注损伤的影响。②方法 采用Wistar大鼠原位肺缺血再灌注损伤模型 ,测定再灌注后左肺动脉压、左肺湿干质量比值 ,肺组织中丙二醛 (MDA)含量、超氧化物歧化酶 (SOD)及ATPase活性。③结果 同对照组比较 ,预防性静注CGS(5 0mg/kg体质量 )后 ,可显著降低再灌注肺组织中MDA和左肺动脉压及肺湿干质量比值 (F =3.85~ 6 .37,q=4 .2 1~ 8.98,P <0 .0 5 ,0 .0 1) ;明显提高肺组织中SOD及ATPase活性 (F =4 .39,5 .86 ,q =8.6 4 ,10 .2 1,P <0 .0 5 ,0 .0 1)。 ④结论 CGS对大鼠实验性肺缺血再灌注损伤具有保护作用  相似文献   

9.
目的 探讨2型糖尿病大鼠血清及胃组织Ghrelin表达变化与胃排空的关系.方法 将大鼠随机分为糖尿病组、单纯肥胖组和对照组,通过高糖高脂饮食结合小剂量链脲佐菌素(STZ)的方法建立2型糖尿病大鼠动物模型.饲养8周后糖尿病组注射STZ后,检测并计算各组大鼠体质量、空腹血糖、胰岛素、胰岛素抵抗指数、胃排空、血清Ghrelin及胃组织Ghrelin mRNA表达.结果 糖尿病组和单纯肥胖组大鼠饲养8周后,体质量和胰岛素水平较对照组明显升高(F=63.90、16.72,q=12.76~14.51,P<0.01),血糖与对照组比较差异无显著性(P>0.05).注射STZ后,糖尿病组大鼠血糖水平升高,与对照组比较差异有显著性(F=129.00,q=20.50,P<0.05),而胰岛素水平与对照组差异无显著性(P>0.05).糖尿病组和单纯肥胖组大鼠液体胃排空低于对照组(F=123.00,q=19.49、18.52,P<0.05),血清Ghrelin、胃组织Ghrelin mRNA表达均明显下降(F=35.01、34.69,q=8.73~11.16,P<0.05).结论 2型糖尿病大鼠血清Ghrelin水平、胃组织Ghrelin mRNA表达的下降可能与糖尿病胃排空障碍有关.  相似文献   

10.
牛羊膜联合应用rb-bFGF对Ⅱ度烧伤创面的疗效   总被引:1,自引:0,他引:1  
目的 观察牛羊膜覆盖烧伤创面联合应用牛碱性成纤维细胞生长因子(rb-bFGF)对烧伤创面的临床治疗效果.方法 选择以Ⅱ度烧伤创面为主的中小面积热力烧伤病人43例,试验创面面积为1%~2%.将每例病人相同性质的创面等分为3份,分别应用有孔牛羊膜(治疗组)、牛羊膜(对照组1)、凡士林油纱布(对照组2)覆盖烧伤创面,3组均联合应用rb-bFGF.结果 治疗组与对照组1和对照组2相比,以深Ⅱ度烧伤创面为主的病人的创面愈合时间明显缩短(F=25.36,q=7.25、3.46,P<0.01);在治疗以浅Ⅱ度烧伤创面为主的病人过程中,治疗组与对照组2相比创面愈合时间明显缩短(F=12.29,q=5.21,P<0.01),而与对照组1相比没有明显差别(q=2.60,P>0.05).结论 有孔牛羊膜覆盖烧伤创面及联合应用rb-bFGF能加速烧伤创面的愈合.  相似文献   

11.
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   

12.
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   

13.
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   

14.
目的:评价使用安心颗粒对急诊经皮冠状动脉介入术(PPCI)术后生活质量的影响.方法:将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组(术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次)和对照组(仅接受基础药物治疗).所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表(MIDAS)、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果:入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异(P>0.05);出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低(P<0.05);组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低(P<0.05).两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血(P>0.05).两组发生轻度血小板减少症的患者数比较无差异(P>0.05).结论:PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.  相似文献   

15.
Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P<0.01);the MAP decreased(P<0.01)and the HR increased drastically(P<0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.  相似文献   

16.
Objective:To investigate the gene expression of osteoprotegerin(OPG) and osteoclast differentiation factor(ODF) in the bone tissue of patients with hip fracture due to osteoporosis. Methods:OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers(over 50 years old) with hip fracture(Observer Group) and 30 cases of hip facture sufferers with no osteoporosis(Control group) were analyzed with the Semi-Quantitative RT-PCR method. Results:The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion:Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.  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.
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   

19.
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   

20.
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   

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