Acute myocardial infarction (AMI) is an acute cardiovascular emergency. This study was undertaken to assess the effect of tumor necrosis factor-a (TNF-a) on ventricular arrhythmias induced byAMI in rats in vivo. ...Acute myocardial infarction (AMI) is an acute cardiovascular emergency. This study was undertaken to assess the effect of tumor necrosis factor-a (TNF-a) on ventricular arrhythmias induced byAMI in rats in vivo. Two hundred and forty male Wistar rats were randomized into a sham- operation group, an AMI group, and a recombinant human tumor necrosis factor receptor:Fc fusion protein(rhTNFR:Fc) group. Acute anterior wall myocardial infarction was produced in the AMI group by ligating the left anterior descending coronary artery (LAD), and there was no ligation but operation in the sham-operation group. The rhTNFR:Fc group was treated with rhTNFR:Fc(10 mg/kg), a TNF-a antagonist, 24 hours before LAD ligation. The spontaneous and induced programmed electrical stimulation ventricular arrhythmias were recorded at baseline and 10 minutes, 20 minutes, 30 minutes, 60 minutes, 3 hours, 6 hours and 12 hours after ligation. At the same time the protein and mRNA expression levels of TNF-a among different groups were detected by histochemistry and real-time fluorescent quantitative PCR. Expression of TNF-a increased markedly from 10 minutes after infarction, peaked at 20-30 minutes, and returned to baseline gradually in the AMI group and rhTNFR:Fc group. The time- windows of spontaneous and induced ventricular arrhythmias were similar. Compared with the AMI group, the rhTNFR:Fc group showed a lesser expression of TNF-a protein and a lower incidence of ventricular arrhythmias (P〈0.05). There was no obvious change in the sham-operation group. The expression of TNF-a induced by AMI could contribute to the onset of ventricular arrhythmias.展开更多
目的:通过大鼠下颌骨缺损再植的实验动物模型,基于Janus激酶-信号转导与转录激活因子(Janus kinase-signal transducers and activators of transcription,JAK-STAT)通路探讨注射重组人源肿瘤坏死因子受体融合蛋白(recombinant human tu...目的:通过大鼠下颌骨缺损再植的实验动物模型,基于Janus激酶-信号转导与转录激活因子(Janus kinase-signal transducers and activators of transcription,JAK-STAT)通路探讨注射重组人源肿瘤坏死因子受体融合蛋白(recombinant human tumor necrosis factor receptor:Fc fusion protein,rhTNFR:Fc)对下颌骨缺损大鼠的干预效果。方法:将70只(雌雄各半)7~8周龄的健康SD大鼠随机分为3组,分别为空白组(10只)、对照组(30只)和实验组(30只)。实验组:于大鼠骨缺损处注入含有Rh TNFR:Fc(45 mg/kg)的Bio-Oss骨颗粒,其上覆盖Bio-Gide胶原膜;对照组:于大鼠缺损处注入含25μL 0.9%氯化钠溶液的Bio-Oss骨颗粒,同样覆盖Bio-Gide胶原膜;空白对照组为健康大鼠。取所有大鼠下颌骨组织,观察其形态学变化,行组织形态计量学测定。实验组和对照组大鼠于术后3、6、9周时被分批处死,取其左侧下颌骨进行炎症因子白细胞介素-6(interleukin-6,IL-6)和肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)表达水平的检测,同时检测组织中凋亡相关分子Bax、Bcl-2、p-JAK2和p-STAT3蛋白的表达。结果:与对照组比较,实验组的缺损面积显著减少,IL-6和TNF-α的浓度显著下降,而凋亡相关分子Bax、p-JAK2和p-STAT3的表达显著下降,Bcl-2表达显著升高(P<0.05);与空白组比较,对照组和实验组缺损面积显著增加,缺损模型建立成功。结论:局部注射rh TNFR:Fc与Bio-Oss骨颗粒能够有效地促进下颌骨缺损修复,并且效果显著优于只使用Bio-Oss骨颗粒的组别,其修复作用与抑制细胞凋亡的能力相关,通过实验我们发现JAK2-STAT3细胞信号通路在其中发挥了重要作用。展开更多
目的:探究重组人Ⅱ型肿瘤坏死因子(TNF)受体-抗体融合蛋白联合风湿骨痛片对类风湿性关节炎(RA)患者的疗效。方法:将90例RA患者随机分为观察组和对照组,每组各45例。对照组给予注射重组人Ⅱ型TNF受体-抗体融合蛋白;观察组注射重组人Ⅱ型...目的:探究重组人Ⅱ型肿瘤坏死因子(TNF)受体-抗体融合蛋白联合风湿骨痛片对类风湿性关节炎(RA)患者的疗效。方法:将90例RA患者随机分为观察组和对照组,每组各45例。对照组给予注射重组人Ⅱ型TNF受体-抗体融合蛋白;观察组注射重组人Ⅱ型TNF受体-抗体融合蛋白联合口服风湿骨痛片。比较两组患者的血清炎症因子、炎性指标、临床疗效、美国健康评估问卷(HAQ)、RA28处关节疾病活动度评分(DAS28)。结果:治疗后,两组患者的IL-6、TNF-α水平比治疗前低,IL-10比治疗前高( P <0.05),观察组的IL-6、TNF-α水平低于对照组,IL-10水平高于对照组( P <0.05);两组患者的类风湿因子(RF)、红细胞沉降率(ESR)、C反应蛋白(CRP)炎性指标均较治疗前更低( P<0.05),且观察组低于对照组(P <0.05);观察组患者临床疗效总有效率为93.33%,高于对照组的73.33%( P <0.05);两组患者HAQ 评分、DAS28及症状积分较治疗前更低( P <0.05),且观察组患者HAQ 评分、DAS28 评分及症状积分低于对照组( P <0.05)。结论:对RA患者采用注射重组人Ⅱ型TNF受体-抗体融合蛋白联合口服风湿骨痛片治疗,提高了临床治疗效果和患者生活质量,减轻了患者的痛苦。展开更多
文摘Acute myocardial infarction (AMI) is an acute cardiovascular emergency. This study was undertaken to assess the effect of tumor necrosis factor-a (TNF-a) on ventricular arrhythmias induced byAMI in rats in vivo. Two hundred and forty male Wistar rats were randomized into a sham- operation group, an AMI group, and a recombinant human tumor necrosis factor receptor:Fc fusion protein(rhTNFR:Fc) group. Acute anterior wall myocardial infarction was produced in the AMI group by ligating the left anterior descending coronary artery (LAD), and there was no ligation but operation in the sham-operation group. The rhTNFR:Fc group was treated with rhTNFR:Fc(10 mg/kg), a TNF-a antagonist, 24 hours before LAD ligation. The spontaneous and induced programmed electrical stimulation ventricular arrhythmias were recorded at baseline and 10 minutes, 20 minutes, 30 minutes, 60 minutes, 3 hours, 6 hours and 12 hours after ligation. At the same time the protein and mRNA expression levels of TNF-a among different groups were detected by histochemistry and real-time fluorescent quantitative PCR. Expression of TNF-a increased markedly from 10 minutes after infarction, peaked at 20-30 minutes, and returned to baseline gradually in the AMI group and rhTNFR:Fc group. The time- windows of spontaneous and induced ventricular arrhythmias were similar. Compared with the AMI group, the rhTNFR:Fc group showed a lesser expression of TNF-a protein and a lower incidence of ventricular arrhythmias (P〈0.05). There was no obvious change in the sham-operation group. The expression of TNF-a induced by AMI could contribute to the onset of ventricular arrhythmias.
文摘目的:探究重组人Ⅱ型肿瘤坏死因子(TNF)受体-抗体融合蛋白联合风湿骨痛片对类风湿性关节炎(RA)患者的疗效。方法:将90例RA患者随机分为观察组和对照组,每组各45例。对照组给予注射重组人Ⅱ型TNF受体-抗体融合蛋白;观察组注射重组人Ⅱ型TNF受体-抗体融合蛋白联合口服风湿骨痛片。比较两组患者的血清炎症因子、炎性指标、临床疗效、美国健康评估问卷(HAQ)、RA28处关节疾病活动度评分(DAS28)。结果:治疗后,两组患者的IL-6、TNF-α水平比治疗前低,IL-10比治疗前高( P <0.05),观察组的IL-6、TNF-α水平低于对照组,IL-10水平高于对照组( P <0.05);两组患者的类风湿因子(RF)、红细胞沉降率(ESR)、C反应蛋白(CRP)炎性指标均较治疗前更低( P<0.05),且观察组低于对照组(P <0.05);观察组患者临床疗效总有效率为93.33%,高于对照组的73.33%( P <0.05);两组患者HAQ 评分、DAS28及症状积分较治疗前更低( P <0.05),且观察组患者HAQ 评分、DAS28 评分及症状积分低于对照组( P <0.05)。结论:对RA患者采用注射重组人Ⅱ型TNF受体-抗体融合蛋白联合口服风湿骨痛片治疗,提高了临床治疗效果和患者生活质量,减轻了患者的痛苦。