Role of angiotensin Ⅱ and JAK2 signal pathway in transdifferentation of renal tubular cells in mice after acute ischemic followed by reperfusion

Objective To investigate the effect of angiotensin (Ang) Ⅱ and its Janns-activated kinase-2 (JAK2) signal pathway in transdifferentiation of renal tubular cells under the challenge of acute ischemic reperfusion injury.Methods Models of acute ischemic reperfusion injury were established and the level of local Ang Ⅱ ,a key element of renin-angiotensin system (RAS),in kidney was measured using radioimmunity technique.The expression of α-smooth muscle actin (α-SMA),a phenotype of mesenchymal cells,was detected by RT-PCR and inununohistochemistry methods.Renal tubule cells ( NRK-52E) were cultured with various concentration of Ang Ⅱ ,followed by blocking of PD123319,Ang U receptor 2 antagonist,and AG490,an inhibitor of JAK2 signal pathway.Results Ang 0 of kidney tissue increased immediately after acute ischemic-reperfusion injury,in time dependent fashion.Expression of α-SMA in renal tubule cells was found at 48 hours after ischemic-reperfusion injury and in NRK-52E cells treated by high concentration of Ang Ⅱ and was dose and time dependent.The peak of α-SMA expression was seen after 30 minute treatment at the dose of 10-9'mol/L,which was interrupted by both of PD123319 and AG490.Conclusions Transdifferentiarion of renal tubular epithelial cells occurs under acute ischemic- reperfusion injury.Local renin-angiotensin system may play a role in the transdifferentiation of TEC through AT2 receptor and its JAK2 signal pathway.     

Role of angiotensin Ⅱ and JAK2 signal pathway in transdifferentation of renal tubular cells in mice after acute ischemic followed by reperfusion

Objective To investigate the effect of angiotensin (Ang) Ⅱ and its Janns-activated kinase-2 (JAK2) signal pathway in transdifferentiation of renal tubular cells under the challenge of acute ischemic reperfusion injury.Methods Models of acute ischemic reperfusion injury were established and the level of local Ang Ⅱ ,a key element of renin-angiotensin system (RAS),in kidney was measured using radioimmunity technique.The expression of α-smooth muscle actin (α-SMA),a phenotype of mesenchymal cells,was detected by RT-PCR and inununohistochemistry methods.Renal tubule cells ( NRK-52E) were cultured with various concentration of Ang Ⅱ ,followed by blocking of PD123319,Ang U receptor 2 antagonist,and AG490,an inhibitor of JAK2 signal pathway.Results Ang 0 of kidney tissue increased immediately after acute ischemic-reperfusion injury,in time dependent fashion.Expression of α-SMA in renal tubule cells was found at 48 hours after ischemic-reperfusion injury and in NRK-52E cells treated by high concentration of Ang Ⅱ and was dose and time dependent.The peak of α-SMA expression was seen after 30 minute treatment at the dose of 10-9'mol/L,which was interrupted by both of PD123319 and AG490.Conclusions Transdifferentiarion of renal tubular epithelial cells occurs under acute ischemic- reperfusion injury.Local renin-angiotensin system may play a role in the transdifferentiation of TEC through AT2 receptor and its JAK2 signal pathway.     

核素骨显像在识别骨质疏松椎体压缩性骨折黑线信号中的价值分析

目的 探讨核素骨显像在识别骨质疏松椎体压缩性骨折(OVCF)黑色线性信号中的价值与作用。方法 回顾性分析2018年9月1日至2021年7月1日我院48例OVCF患者X片、QCT、MRI和核素骨显像病例资料。根据MRI上信号不同表现分为黑色线性信号组(A组20例)和非黑色线性信号组(B组28例),比较两组患者一般资料、MRI黑色线性信号和核素骨显像浓聚形态及特征之间的相关性。结果 两组患者共涉及新鲜和陈旧性骨折椎体共56个,其中MRI诊断出新鲜骨折椎体43个,骨显像诊断出45个,结合患者临床和影像学表现最终确认责任椎体42个,对MRI和骨显像诊断结果采取Kappa检验(Kappa>0.75),表明两者诊断一致性较高。两组患者年龄、性别、骨密度值差异无统计学意义(P>0.05)。对比核素骨显像上造影剂汇聚形态及浓度与MRI上黑色线性信号的表现之间未见明显相关性(P>0.05)。结论 骨显像与MRI在诊断新鲜骨质疏松椎体压缩性骨折上具有高度一致性。MRI黑色线信号的作为一种可以早期预测OVCF患者预后的危险因素,骨显像在发现伴MRI黑色线性信号表现的OVCF患者时未见明显特异性。     

黄体期内应用米非司酮对月经的影响

米非司酮（mifepristone，RU486）是人工合成的高效抗孕激素药物，主要用于抗早孕。国内外已有关于试用米非司酮治疗子宫内膜异位症（腺肌症）、子宫肌瘤、功能性子宫出血等伴月经过多症状疾病的文献报道。其方法为低剂量长疗程（连续3～6个月以上），使子宫内膜萎缩而形成闭经。为探讨不致闭经又对症状性月经量偏多有所改善的合适疗程，     

Role of angiotensin Ⅱ and JAK2 signal pathway in transdifferentation of renal tubular cells in mice after acute ischemic followed by reperfusion

Objective To investigate the effect of angiotensin (Ang) Ⅱ and its Janns-activated kinase-2 (JAK2) signal pathway in transdifferentiation of renal tubular cells under the challenge of acute ischemic reperfusion injury.Methods Models of acute ischemic reperfusion injury were established and the level of local Ang Ⅱ ,a key element of renin-angiotensin system (RAS),in kidney was measured using radioimmunity technique.The expression of α-smooth muscle actin (α-SMA),a phenotype of mesenchymal cells,was detected by RT-PCR and inununohistochemistry methods.Renal tubule cells ( NRK-52E) were cultured with various concentration of Ang Ⅱ ,followed by blocking of PD123319,Ang U receptor 2 antagonist,and AG490,an inhibitor of JAK2 signal pathway.Results Ang 0 of kidney tissue increased immediately after acute ischemic-reperfusion injury,in time dependent fashion.Expression of α-SMA in renal tubule cells was found at 48 hours after ischemic-reperfusion injury and in NRK-52E cells treated by high concentration of Ang Ⅱ and was dose and time dependent.The peak of α-SMA expression was seen after 30 minute treatment at the dose of 10-9'mol/L,which was interrupted by both of PD123319 and AG490.Conclusions Transdifferentiarion of renal tubular epithelial cells occurs under acute ischemic- reperfusion injury.Local renin-angiotensin system may play a role in the transdifferentiation of TEC through AT2 receptor and its JAK2 signal pathway.     

产科休克42例临床分析

产科休克４２例临床分析彭玉莲，周青松４３００１４武汉市第二医院产科休克是一种严重的产科并发症，一直是导致孕产妇死亡的主要原因。临床上如能早期预防，及时诊断，正确处理，对降低围产期孕产妇及胎婴儿死亡率有极为重要的作用。本文对我院４年来发生的产科休克４２...     

经脐腹腔镜技术治疗精索静脉曲张56例分析

目的：探讨改良与简化的经脐腹腔镜技术治疗精索静脉曲张的疗效与安全性。方法2011年7月至2013年1月,应用改良与简化的经脐腹腔镜技术治疗原发性精索静脉曲张患者56例。总结患者手术时间、术中出血量、住院时间,评估术后并发症、阴囊彩超、精液质量和症状改善等情况。结果所有患者手术均获成功,手术时间15～50 min,平均（25．7±9．2）min;平均出血小于10 mL;住院时间2～5 d,平均（3．5±1．2）d。术后随访3～24个月,患者症状和体征有显著改善,46例患者精液质量有显著提高,随访期间无严重并发症发生。结论改良与简化的经脐腹腔镜技术治疗精索静脉曲张安全、有效,并且能够降低设备成本和手术难度。     

29例米非司酮抗早孕并发症原因分析

２９例米非司酮抗早孕并发症原因分析彭玉莲，周青松４３００１４武汉市第二医院米非司酮（简称ＲＵ４８６）配伍前列腺素类药物应用于抗早孕被认为具有安全、高效、简便、易行等优点。但有越来越多的使用者出血时间长、出血量多，甚至并发宫外孕等问题，必须高度重视。本...     

Survivin在小鼠髓源性树突状细胞不同分化阶段中的差异性表达

目的:探讨不同分化阶段的树突状细胞(DC)sur-vivin的差异性表达。方法:制备骨髓细胞作为DC前体,以rmGM-CSF联合rmIL-4对前体细胞诱导培养,第5天时添加rmTNF-α继续孵育48 h以进一步刺激DC分化成熟。分别收集0、5、7 d的细胞(其中第5天的细胞为添加rmTNF-α前收集),扫描电镜观察DC形态、流式细胞术鉴定DC表型,RT-PCR、Western blot检测不同分化阶段DCsurvivin的表达。结果:扫描电镜下不同分化阶段的细胞均具有典型DC形态;流式细胞术分析表明,不同成熟阶段的DC均高表达小鼠髓源性DC相对特异性标志CD11c,经rmTNF-α刺激后的DC其细胞表面CD40、CD86、MHC-Ⅱ等分子呈高水平表达;RT-PCR、Western blot检测结果显示,随着DC的分化成熟,sur-vivinmRNA及蛋白的表达水平呈上升趋势。结论:不同诱导条件下,获得的DCsurvivin表达有差别,随着DC成熟,sur-vivin表达增加。