NRK-52E缺血再灌注损伤时Kim-1、NO变化及虫草对其的干预作用

目的通过抗霉素A(Antimycin A,AA)刺激大鼠肾小管上皮细胞(NRK-52E)模拟体外缺血再灌注损伤过程,观察缺血再灌注损伤时NRK-52E中肾损伤分子-1(kidney injury molecule-1,Kim-1)及NO表达的变化及冬虫夏草对其的干预作用。方法将体外培养的NRK-52E分为对照组、模型组和虫草组。虫草组予含40 mg/L虫草原液的培基预处理。培养72 h后NRK-52E去除培基,予10-10 mol/L抗霉素A(AA)刺激1 h,模拟体外缺血过程,1 h后再加入培基,模拟体外再灌注损伤过程。分别在AA刺激前,AA刺激后1 h,加入培基再灌注10 min,30 min,60 min,120 min共6个时间点终止实验。用流式细胞仪以Annexin V/PI双染法检测细胞凋亡;分别用硝酸还原酶法和ELISA检测细胞上清液Kim-1与NO浓度;用RT-PCR法观察Kim-1 mRNA表达。结果 NRK-52E细胞经AA刺激后,细胞凋亡率显著增高,同时Kim-1表达上调;缺血60 min较缺血前Kim-1蛋白水平增加了3.1倍,再灌注10 min增加了3.6倍(P<0.05)。Kim-...     

不动杆菌感染的药敏分析

目的了解不动杆菌感染在本院的耐药现状。方法采用美国(MicroScan autoScan4)细菌分析系统对40株不动杆菌进行体外鉴定及药敏敏感性的分析。按美国国家临床实验的标准化委员会(NCCLS)制定的标准进行。结果标本来源以痰标本为主,占70%。40株不动杆菌中氨基糖苷类的药物最敏感,其次复方新诺明、亚胺培南、头孢曲松、氨苄青霉素/舒巴坦。结论不动杆菌主要引起呼吸道感染,虽然耐药率还不是很严重,但不能忽视多重耐药菌株的出现,要减少多重耐药菌株的产生,就必须合理应用抗菌药物。     

聚苯乙烯在环己烷、甲基环己烷系统中的液液平衡 Ⅰ．雾点线和旋节线的实验测定

建立了高分子溶液雾点线和旋节线的测定方法及其实验装置，测定了环己烷－聚苯乙烯（Ｍ＿ｗ＝１９００００；Ｍ＿ｗ／Ｍ＿ｎ＝１．０４）、甲基环己烷－聚苯乙烯（Ｍ＿ｗ＝３７９００；Ｍ＿ｗ／Ｍ＿ｎ＝１．０１）系统的雾点线和旋节线，经与文献数据比较，表明本方法及其装置是可行的。     

急性重症肝炎小鼠肝脏趋化因子IP-10 mRNA的表达及意义

目的 探讨急性重症肝炎小鼠肝脏趋化因子IP-10 mRNA的表达及意义。方法 通过腹腔注射3型鼠肝炎病毒（MHV-3）建立急性重症肝炎小鼠模型,常规HE染色后进行肝组织HAI积分评估,常规生化检测感染后各时间点血清ALT的水平,实时定量PCR技术检测感染MHV-3 0、24、48、72 h后的Babl/cJ小鼠肝内趋化因子IP-10 mRNA的表达水平。结果 感染后的Balb/cJ小鼠血清ALT的水平以及肝脏HAI积分均显著升高,肝内IP-10 mRNA水平也显著上升,在48h和72h分别为感染前的 99倍和150倍。Persion相关分析证实感染后肝内趋化因子IP-10 mRNA的表达与血清ALT及肝组织HAI积分显著正相关(P<0.05)。结论 趋化因子IP-10在小鼠急性重症肝炎肝内淋巴细胞的募集及随后的坏死性炎症和急性肝衰竭中可能发挥着重要作用。     

肥胖并子宫内膜癌病人腹部脂肪组织芳香化酶mRNA的表达

①目的　了解绝经后肥胖并子宫内膜癌病人腹部脂肪组织芳香化酶mRNA的表达水平 ,并探讨其在子宫内膜癌发病中的作用及与胰岛素抵抗的关系。②方法　术中留取绝经后肥胖并子宫内膜癌、单纯肥胖妇女及正常体质量妇女腹部皮下及大网膜脂肪组织 ,进行总RNA提取 ,并应用半定量逆转录 聚合酶链反应技术检测芳香化酶mRNA的表达水平。同时测定空腹血糖及空腹真胰岛素水平。③结果　绝经后肥胖并子宫内膜癌病人脂肪组织芳香化酶mRNA的表达水平高于正常体质量妇女 (F =9.2 2、1 3.6 1 ,q =5 .39、6 .32 ,P <0 .0 1 ) ;与绝经后单纯肥胖女性比较无显著差异 (q =0 .2 6、0 .1 3,P >0 .0 5 )。绝经后肥胖并子宫内膜癌和单纯肥胖妇女脂肪组织芳香化酶mRNA的表达与空腹血清胰岛素水平呈正相关 (r =0 .6 37- 0 .737,P <0 .0 5 )。④结论　绝经后肥胖并子宫内膜癌病人腹部脂肪组织芳香化酶mRNA表达水平增高可能与子宫内膜癌发生无关 ,但是可能与高胰岛素血症有关     

Dysregulation of the TGF-β Postreceptor Signaling Pathway in Cell Lines Derived from Primary or Metastatic Ovarian Cancer

Transforminggrowthfactor β (TGF β)isamul tifunctionalhomodimeric polypeptide ,whichmaycausecellcyclearrest ,terminaldifferentiation ,orapoptosisandactsasanegativegrowthregulatorinmostnormalepithelialandendothelialcelltypes ,whereasmostmalignantcelllines…     

Molecular mechanism of Chuanxiong Rhizoma in treating coronary artery diseases

ObjectiveMost of the studies on the herb Chuanxiong Rhizoma (CR) have focused on the l-arginine-nitric oxide (NO) pathway, but the nitrate-nitrite-NO (NO₃⁻–NO₂⁻–NO) pathway was rarely investigated. Therefore, the aim of this study was to evaluate the effects and mechanisms of action of CR in coronary artery disease (CAD).MethodsThe NO₃⁻, NO₂⁻ and NO levels were examined in the NO₃⁻–NO₂⁻–NO pathway. High-performance ion chromatography was used to quantify NO₃⁻ and NO₂⁻ levels. Then, NO was quantified using a multifunctional enzyme marker with a fluorescent probe. The tension of aortic rings was measured using a multi myograph system.ResultsHigh content of NO₃⁻ and low content of NO₂⁻ was found in CR, and which could potently convert NO₃⁻ to NO₂⁻ in the presence of endogenous reductase enzyme. Incubating human coronary artery endothelial cells (HCAECs) with CR-containing serum showed that CR significantly decreased the NO₃⁻ content and increased the levels of NO₂⁻ and NO in the cells under hypoxic conditions. In addition, CR significantly relaxed isolated aortic rings when the l-arginine –NO pathway was blocked. The optimal concentration of CR for relaxation was 200 mg/mL.ConclusionCR supplements large amounts of NO in cells and vessels to achieve relaxation via the NO₃⁻–NO₂⁻–NO pathway, thereby making up for the deficiency caused by the lack of NO after the l-arginine-NO pathway is suppressed. This study also supports the potential use of a traditional Chinese herb for future drug development.     

A new model to predict acute kidney injury after cardiac surgery in patients with renal insufficiency

ObjectiveTo establish a simple model for predicting postoperative acute kidney injury (AKI) requiring renal replacement therapy (RRT) in patients with renal insufficiency (CKD stages 3–4) who underwent cardiac surgery.MethodsA total of 330 patients were enrolled. Among them, 226 were randomly selected for the development group and the remaining 104 for the validation group. The primary outcome was AKI requiring RRT. A nomogram was constructed based on the multivariate analysis with variables selected by the application of the least absolute shrinkage and selection operator. Meanwhile, the discrimination, calibration, and clinical power of the new model were assessed and compared with those of the Cleveland Clinic score and Simplified Renal Index (SRI) score in the validation group. Results: The rate of RRT in the development group was 10.6% (n = 24), while the rate in the validation group was 14.4% (n = 15). The new model included four variables such as postoperative creatinine, aortic cross‐clamping time, emergency, and preoperative cystatin C, with a C-index of 0.851 (95% CI, 0.779–0.924). In the validation group, the areas under the receiver operating characteristic curves for the new model, SRI score, and Cleveland Clinic score were 0.813, 0.791, and 0.786, respectively. Furthermore, the new model demonstrated greater clinical net benefits compared with the Cleveland Clinic score or SRI score.ConclusionsWe developed and validated a powerful predictive model for predicting severe AKI after cardiac surgery in patients with renal insufficiency, which would be helpful to assess the risk for severe AKI requiring RRT.     

PLUNC基因启动子区荧光素酶报告载体的构建与鉴定

目的构建人PLUNC(palate,lung and nasal epithelium clone)基因启动子区C-1888T SNP位点不同单倍型荧光素酶报告基因表达载体。方法利用PCR技术得到1888位点不同基因型的PLUNC基因启动子区目的片段,将其分别插入到pMD18-T载体和pGL3-enhancer荧光素酶报告基因载体中并测序。结果成功构建了人类PLUNC基因C-1888T SNP位点上的2种不同纯合子基因型(CC型和TT型)的荧光素酶报告载体(pGL3-enhancer-T型和pGL3-enhancer-C型),且测序得以证实。结论成功构建出的荧光素酶报告载体,为研究PLUNC基因不同的1888SNP位点能否调控不同的PLUNC基因表达提供了基本实验条件。     

插入式微波天线阵列诱导高温原位灭活治疗肢体恶性或侵袭性骨肿瘤

目的：评价插入式微波天线阵列诱导高温原位灭活治疗肢体恶性或侵袭性骨肿瘤保肢诉临床应用。方法：应用插入式微波天线阵列诱导高温原位灭活治疗肢体恶性或侵袭性骨肿瘤１９０例,从手术技术、肿瘤学、关节功能并发症等方面全面综合评价此方法的临床应用效果。结果：恶性骨肿瘤１３４例,术后平均随访４７ｍｏ,因远隔脏器转移死亡者３２例,另有３例虽有肺部转移,但经转移病灶切除后现仍无瘤存活;存活率为７４．２％;１０２例存