Purpose: Bursal inflammation is thought to be a major cause of pain in degenerative rotator cuff tears (RCTs). While the expression of proinflammatory mediators, such as COX-2, TNF-α, IL-1β, and IL-6, is crucial for...Purpose: Bursal inflammation is thought to be a major cause of pain in degenerative rotator cuff tears (RCTs). While the expression of proinflammatory mediators, such as COX-2, TNF-α, IL-1β, and IL-6, is crucial for the pathophysiology of osteoarthritis (OA), their role in degenerative RCTs remains unknown. The aim of this study was to determine the expression of COX-2 and proinflammatory mediators in the development of RCT-induced pain by comparing their levels in patients with hip OA or RCTs. Methods: We included samples obtained from 31 shoulders of 31 patients with RCTs and samples from 30 hips of 27 patients with hip OA. The mRNA levels of COX-2, TNF-α, IL-1β, and IL-6 were determined using RT-PCR, and were compared between the subacromial bursa and hip joints. We also analyzed IL-1β-induced COX-2 expression in the subacromial bursa and synovial blast of the hip. Results: COX-2, IL-1β, and IL-6 expression levels were significantly lower in the subacromial bursa of RCTs than in hip OA samples, while no significant difference was observed for TNF-α. No significant difference in the fold increase was observed between subacromial bursa and hip OA samples, even though IL-1β-induced COX-2 expression increased in both samples. Conclusion: Our findings suggest that the main mechanism underlying pain development differs between patients with RCTs and those with hip OA.展开更多
目的探讨乌司他丁(UTI)对大鼠心肺复苏(CPR)后脑组织白细胞介素(IL)-1β、肿瘤坏死因子(TNF)-α水平以及心功能的影响。方法随机将30只SD大鼠分为空白对照组、CPR组以及UTI组各10只。应用窒息法建立大鼠心脏骤停模型,进行CPR,自主循环恢...目的探讨乌司他丁(UTI)对大鼠心肺复苏(CPR)后脑组织白细胞介素(IL)-1β、肿瘤坏死因子(TNF)-α水平以及心功能的影响。方法随机将30只SD大鼠分为空白对照组、CPR组以及UTI组各10只。应用窒息法建立大鼠心脏骤停模型,进行CPR,自主循环恢复(ROSC)后6 h,检测各组左室收缩压(LVSP)、左心室舒张末期压(LVEDP)水平及左心室压力上升(+dp/dtmax)、下降最大速率(-dp/dtmax)。ROSC后24 h处死大鼠后取出心、脑组织,采用酶联免疫吸附法(ELISA)检测脑组织中IL-1β、TNF-α的含量,并采用投射电镜观察心肌细胞超微结构的变化。结果 ROSC后6 h CPR组、UTI组LVSP及±dp/dtmax明显降低(P<0.05),LVEDP明显升高(P<0.05)。与空白对照组相比,ROSC后6 h CPR组、UTI组LVSP、+dp/dtmax及-dp/dtmax均显著下降(P<0.05),而LVEDP显著上升(P<0.05);与CPR组相比,ROSC后6 h UTI组LVSP上升,LVEDP下降(P<0.05)。CPR组、UTI组IL-1β、TNF-α含量均显著高于空白对照组(P<0.05),而UTI组IL-1β、TNF-α含量均显著低于CPR组(P<0.05)。结论 UTI可以抑制体内IL-1β和TNF-α的表达,同时减轻心肌组织的损伤,改善CPR后心功能。展开更多
文摘Purpose: Bursal inflammation is thought to be a major cause of pain in degenerative rotator cuff tears (RCTs). While the expression of proinflammatory mediators, such as COX-2, TNF-α, IL-1β, and IL-6, is crucial for the pathophysiology of osteoarthritis (OA), their role in degenerative RCTs remains unknown. The aim of this study was to determine the expression of COX-2 and proinflammatory mediators in the development of RCT-induced pain by comparing their levels in patients with hip OA or RCTs. Methods: We included samples obtained from 31 shoulders of 31 patients with RCTs and samples from 30 hips of 27 patients with hip OA. The mRNA levels of COX-2, TNF-α, IL-1β, and IL-6 were determined using RT-PCR, and were compared between the subacromial bursa and hip joints. We also analyzed IL-1β-induced COX-2 expression in the subacromial bursa and synovial blast of the hip. Results: COX-2, IL-1β, and IL-6 expression levels were significantly lower in the subacromial bursa of RCTs than in hip OA samples, while no significant difference was observed for TNF-α. No significant difference in the fold increase was observed between subacromial bursa and hip OA samples, even though IL-1β-induced COX-2 expression increased in both samples. Conclusion: Our findings suggest that the main mechanism underlying pain development differs between patients with RCTs and those with hip OA.
文摘目的探讨乌司他丁(UTI)对大鼠心肺复苏(CPR)后脑组织白细胞介素(IL)-1β、肿瘤坏死因子(TNF)-α水平以及心功能的影响。方法随机将30只SD大鼠分为空白对照组、CPR组以及UTI组各10只。应用窒息法建立大鼠心脏骤停模型,进行CPR,自主循环恢复(ROSC)后6 h,检测各组左室收缩压(LVSP)、左心室舒张末期压(LVEDP)水平及左心室压力上升(+dp/dtmax)、下降最大速率(-dp/dtmax)。ROSC后24 h处死大鼠后取出心、脑组织,采用酶联免疫吸附法(ELISA)检测脑组织中IL-1β、TNF-α的含量,并采用投射电镜观察心肌细胞超微结构的变化。结果 ROSC后6 h CPR组、UTI组LVSP及±dp/dtmax明显降低(P<0.05),LVEDP明显升高(P<0.05)。与空白对照组相比,ROSC后6 h CPR组、UTI组LVSP、+dp/dtmax及-dp/dtmax均显著下降(P<0.05),而LVEDP显著上升(P<0.05);与CPR组相比,ROSC后6 h UTI组LVSP上升,LVEDP下降(P<0.05)。CPR组、UTI组IL-1β、TNF-α含量均显著高于空白对照组(P<0.05),而UTI组IL-1β、TNF-α含量均显著低于CPR组(P<0.05)。结论 UTI可以抑制体内IL-1β和TNF-α的表达,同时减轻心肌组织的损伤,改善CPR后心功能。
