索拉非尼在肝癌治疗中的应用

肝细胞癌是最常见的恶性肿瘤之一,死亡率高,预后不理想。近年来,应用分子靶向药物治疗肝癌取得重大突破,特别是多靶点、多激酶抑制药索拉非尼在肝癌的治疗取得的成功。     

以眼部症状为突出表现的鼻NK/T细胞淋巴瘤

目的:探讨以眼部症状为突出表现的鼻NK/T细胞淋巴瘤的临床特点及误诊原因。方法:回顾性分析2009-2011年诊治的11例以眼部症状为突出表现的鼻NK/T细胞淋巴瘤患者的临床资料。结果:首诊误诊率为72.7%,1次病理检查误诊率为27.3%。以眼部症状为突出表现的鼻NK/T细胞淋巴瘤发病较快,影像学表现相对特异。结论:以眼部症状为突出表现的鼻NK/T细胞淋巴瘤易误诊;结合临床特点、影像学表现,经病理学检查有助于尽早确诊。     

Exosomes with FOXP3 from gene-modified dendritic cells ameliorate the development of EAE by regulating the balance of Th/Treg

Objective: To investigate the efficiency and potential mechanisms of exosomes from dendritic cells (DCs) transfected with Forkhead box protein P3 (FOXP3) in the development of experimental autoimmune encephalomyelitis (EAE).Method: Mouse bone marrow-derived immature DCs were loaded with adenovirus carrying FOXP3 gene, and exosomes were generated. Then the exosomes with FOXP3 (FOXP3-EXOs) were co-cultured with CD4+T cell in vitro to evaluate their potential on CD4+T cell proliferation and differentiation, and injected into EAE mice to assess their effects on the development of EAE.Result: FOXP3-EXOs were effective to inhibit the CD4⁺T cell proliferation and the production of Interferon gamma (IFN-γ), interleukin (IL)-6, and IL-17, while they promoted the production of IL-10 in vitro. Moreover, FOXP3-EXOs treatment significantly decreased the neurological scores, reduced the infiltration of inflammatory cells into the spinal cord, and decreased demyelination in comparison to saline and Con-EXOs treated EAE mice. Moreover, the FOXP3-EXOs treatment resulted in obvious increases in the levels of regulatory T (Treg) cells and IL-10, whereas levels of T helper 1 (Th1) cells, Th17 cells, IFN-γ, IL-6, and IL-17 decreased significantly in the splenocyte culture of EAE mice.Conclusion: The present study preliminarily investigated the effects and potential mechanisms of FOXP3-EXOs in EAE and revealed that the FOXP3-EXOs could inhibit the production of Th1 and Th17 cells and promote the production of Treg cells as well as ameliorate the development of EAE. The neuroprotective effects of FOXP3-EXOs on EAE are likely due to the regulation of Th/Treg balance.     

2型糖尿病早期血管内皮功能改变的临床研究

目的：探讨2型糖尿病（T2DM）早期患者血管内皮功能的变化及影响因素。方法：选取45例新诊断无并发症的T2DM患者（T2DM组）,另设正常对照组38例（NC组）,比较两组的一般情况、血脂、糖代谢等生化指标和可溶性血管细胞黏附分子1（SVCAM-1）的差异。结果：①T2DM组SVCAM-1高于NC组[（47.51±13.84）mmol/L vs（27.99±11.66）mmol/L],差异有高度统计学意义（P〈0.01）。②相关分析显示,血清SVCAM-1与体重指数（BMI,r=0.432,P〈0.01）、舒张压（DBP,r=0.229,P〈0.05）、空腹血糖（FPG,r=0.409,P〈0.01）、三酰甘油（TG,r=0.226,P〈0.05）、总胆固醇（TC,r=0.237,P〈0.05）、低密度脂蛋白胆固醇（LDL-C,r=0.241,P〈0.05）呈显著正相关,与高密度脂蛋白胆固醇（HDL-C,r=-0.259,P〈0.01）呈显著负相关。结论：T2DM早期患者即存在血管内皮功能损伤。     

竹红菌甲素敏化E．coli菌体蛋白光氧化反应及机制

本工作利用ＳＤＳ聚丙烯酰胺胶电泳技术分析了甲素对Ｅ．ｃｏｌｉ菌体蛋白光氧化的敏化作用。实验结果表明，甲素结合光照可引起菌体蛋白降解及交联。甲素敏化菌体蛋白光氧化反应可放单线态氧淬灭剂──ＮａＮ３抑制，但不被各种氧自由基、羟自由基抑制剂所阻断，提示甲素敏化的菌体蛋白光氧化反应属Ⅱ型机制。     

不同冻存液冻存慢病毒转染后稳转肝癌细胞株 HepG2的效果比较

目的筛选冻存慢病毒转染后稳转肝癌细胞株HepG2的最佳冻存液。方法采用甘油和二甲基亚砜(DMSO)2种不同冻存保护剂,以4种不同比例的冻存液分别冻存慢病毒转染后肝癌细胞HepG2及未转染的HepG2细胞,并对上述细胞复苏后的存活率及增殖能力进行比较分析。结果采用甘油为冻存保护剂时,冻存液[DMEM∶胎牛血清(FBS)∶甘油]比例为0∶9∶1的转染后细胞存活率最高(P=0.001);未转染细胞存活率与冻存液比例无关(P=0.293)。采用DMSO为冻存保护剂时,转染后细胞存活率为0%;未转染细胞存活率在60%及以上,且与冻存液比例无关(P=0.487)。冻存液中血清含量越高,复苏后细胞的增殖能力越强(P<0.05)。结论冻存慢病毒转染后的稳转肝癌细胞株HepG2的最佳冻存液为90%FBS+10%甘油。     

胫骨交锁髓内钉术后感染分析

目的：探讨胫腌骨骨折交锁髓内钉术后感染的预防与治疗方法。方法;对12例术后感染的病例进行回顾性分析。3例经过抗菌素治疗,9例经过闭式滴不引流加抗菌素治疗,结果;全部病例获随访,随访时间10个月－2年,感染控制,骨折愈合,结论：对胫骨交锁髓内钉术后感染的病人,不必急于取出内固定,采用闭式滴注引流加抗菌素治疗可获得满意效果。     

心房颤动患者心房肌组织AT1-R、AT2-RmRNA的表达及研究

目的:分析血管紧张素Ⅱ受体1型(AT1-R)和受体2型(AT2-R)mRNA在心房颤动心房肌组织中的表达情况,并探讨其与心房结构重构的关系.方法:38例因心脏疾患住院接受开胸手术的患者,男18例,女20例,平均年龄(51.97±13.87)岁(18～77岁),分为3组:窦性心律组(SR组,11例),阵发性心房颤动组(pAF组,心房颤动持续时间小于6个月,13例),慢性心房颤动组(cAF组,心房颤动持续时间大于6个月,14例).半定量聚合酶链式反应技术测定AT1-RmRNA、AT2-RmRNA和免疫组织化学技术测定AT1-R受体蛋白在心房肌组织中的表达情况.结果:与SR组和pAF组相比,cAF组患者的平均左心房直径明显增大(P＜0.01),左心室射血分数降低(P＜0.05);心房肌组织中AT1-RmRNA表达明显下调(P＜0.01～0.05),AT2-R mRNA表达明显上调(P＜0.05).AT1-R mRNA表达与左心房直径负相关(P＜0.005);AT2-R mRNA表达与左心房直径正相关,与左心室射血分数负相关.AT1-R蛋白阳性染色在SR组主要见于细胞膜,在cAF组患者主要见于成纤维细胞和血管平滑肌细胞.结论:cAF时,AT1-RmRNA表达下调,AT2-R mR-NA表达上调,说明存在组织肾素-血管紧张素系统(RAS)激活,RAS可能是通过促进心房结构重构形成,从而影响心房颤动的发生.