二氧化碳和氦气气腹对幼猪红细胞免疫及腹腔液中肿瘤坏死因子α的影响

目的:分别以二氧化碳、氦气模拟气腹动物模型,观察其红细胞免疫功能及腹腔液中肿瘤坏死因子α含量的变化,探讨腹腔镜手术中气腹状态对机体红细胞免疫功能的影响。方法:实验于2004-12/2006-12在西京医院实验外科完成。①实验动物:清洁级幼猪30只,随机数字表法分为3组:二氧化碳气腹组、氦气气腹组、正常对照组,10只/组。②实验方法:幼猪麻醉后,于剑突下正中作小切口,刺入气腹针后连接气腹机,二氧化碳气腹组、氦气气腹组分别注入二氧化碳和氦气,保持气腹压力为1.33～1.60kPa,气体流量为0.3L/min,持续性膨腹30min。正常对照组未进行造模。③实验评估:造模后1,4d,ELISA法检测各组幼猪腹腔灌洗液中细胞数量及其释放肿瘤坏死因子α的含量。各组幼猪分别于造模前1d、造模后1,4d采集外周静脉血,测定红细胞C3b受体花环率(高倍镜下计数200个红细胞,以1个红细胞上结合2个或2个以上酵母菌为阳性花环)、红细胞免疫复合物花环率(结果判断同前)、肿瘤红细胞花环率(高倍镜下计数100个癌细胞,以结合3个或3个以上红细胞为阳性花环)。结果:幼猪30只全部进入结果分析。①腹腔液细胞数量及肿瘤坏死因子α含量检测:造模后氦气气腹组腹腔液中细胞数明显多于二氧化碳气腹组、正常对照组[(10628±326),(5721±271),(5648±262)个/L;t=1.7×10-23,P均<0.05]。与正常对照组腹腔细胞释放肿瘤坏死因子α的含量比较,二氧化碳气腹组明显减少,氦气气腹组明显增多[(462±51),(273±28),(785±68),P均<0.05]。②红细胞免疫功能检测:造模前各组红细胞C3b受体花环率、红细胞免疫复合物花环率、肿瘤红细胞花环率均基本相似(t=0.61～0.92,P均>0.05);造模后1,4d,二氧化碳气腹组红细胞C3b受体花环率、红细胞免疫复合物花环率、肿瘤红细胞花环率均显著低于氦气气腹组和正常对照组(t=8.22×10-5～1.2×10-3,P均<0.05)。二氧化碳气腹组造模后1,4d红细胞C3b受体花环率、红细胞免疫复合物花环率、肿瘤红细胞花环率均明显低于造模前(t=1.9×10-6,1.7×10-4,6.12×10-4,P均<0.05)。结论:不同气体产生的气腹对机体及腹腔内局部免疫功能影响各异,二氧化碳气腹对红细胞免疫功能和腹腔细胞释放肿瘤坏死因子α功能强于氦气气腹。     

苏皖地区汉族人群不稳定型心绞痛患者与血小板反应素4基因A387P多态性的关系

目的:观察血小板反应素4基因G29926C(A387P)多态性与中国苏皖地区汉族人群不稳定型心绞痛的可能关系。方法:选择2004-11/2006-05在南京医科大学第一附属医院和江苏大学附属武进医院住院不稳定型心绞痛患者110例,病例均符合2002年AHA/ACC关于不稳定型心绞痛诊断指南的诊断标准,同期选择337例非冠心病者为对照。酚-氯仿法提取白细胞DNA,应用聚合酶链反应-限制性片段长度多态性方法分析血小板反应素4A387P多态性,取部分PCR扩增产物进一步测序鉴定,比较两组间多态性频率分布差异,探讨血小板反应素4基因多态性与不稳定型心绞痛发病的可能关系。结果:447例均进入结果分析。GC基因型在不稳定型心绞痛组和对照组的分布无统计学差异(5.5%,7.1%,P=0.54),未检测到CC纯合子。C等位基因频率在不稳定型心绞痛组和对照组分别为2.7%,3.6%(P=0.55)。GC基因型与不稳定型心绞痛无显著性关联(OR=0.75,95%CI:0.30￣1.89,P=0.54)。结论:血小板反应素4基因387A→P不是中国苏皖地区汉族人群常见的多态位点,且与不稳定型心绞痛的发病无显著相关性。     

Central calcifying epithelial odontogenic tumour in the posterior maxilla: a case report

The calcifying epithelial odontogenic tumour (CEOT), or Pindborg tumour, is a rare, benign odontogenic tumour. CEOT is usually asymptomatic and an incidental radiological finding, often presenting as a mandibular radiolucency with flecks of calcific material. We report an unusual case of CEOT in the left posterior maxilla of a 46‐year‐old male that was associated with an unerupted tooth. The tumour in this case caused non‐specific sinus symptoms and appeared radiographically similar to an odontoma or ossifying fibroma due to its dense calcific contents. Diagnosis was confirmed histologically following surgical removal of the lesion, which showed classic CEOT histomorphology. We report this case to highlight the unusual clinico‐radiologic presentation and illustrate the diagnostic difficulties that can occur with radiolucent and/or radiopaque lesions in the jaws.     

血浆甘磷酰芥及代谢物的测定方法和大鼠口服药代动力学

利用甘磷酰芥与4-(4′-硝基苯甲基)-吡啶(NBP)呈显色反应建立了该药及其代谢物在血浆及尿中的定量测定方法。观察了血浆在体外对该药的代谢作用及种属差异。研究了大鼠口服该药的药代动力学。     

The Apex polyester fibre anterior cruciate ligament implant: operative procedure and early results

This paper describes the surgical method and instruments for placing and anchoring the Apex polyester fibre anterior cruciate ligament (ACL) reconstruction. It then reviews the early clinical findings and describes recent developments. At the time of review, 172 Apex replacements had been implanted in the UK in arthroscopically proven chronic ACL-deficient knees. These had been inserted at eight centres since 1987, and follow up was by a single observer assessing patients by questionnaire, clinical examination, stress X-ray and KT 1000 arthrometer. Patients less than 12 months from surgery were excluded, leaving 95 with a mean follow up of 27 months (range 13 to 66 months) on whom results are based. Assessment showed improved stability after operation and the Apex implant appears to provide a reliable method of stabilizing the ACL deficient knee within the confines of this short-term review. The authors feel that further trials are justified.     

Activation of ATP-Sensitive Potassium Channels Underlies Contractile Failure in Single Human Cardiac Myocytes During Complete Metabolic Inhibition

ATP-Sensitive Potassium Channels in Human Heart. Introduction: The purpose of this study was to examine the electrophysiologic derangements that underlie contractile failure in single human heart muscle cells exposed to metabolic inhibition. Methods and Results: Single myocytes were isolated from right atrial appendage specimens obtained intraoperatively from patients undergoing routine cardiac surgery. On exposure to lO-mM 2-deoxyglucose (to inhibit glycolysis) and 2-mM cyanide (to inhibit oxidative phosphorylation), twitch shortening decreased to undetectable levels over 5–6 minutes. The action potential duration declined in parallel with the contractile failure. Using voltage clamp depolarizations of a fixed duration the twitch was maintained in metabolic blockade until the development of maintained (rigor) contracture. At this time a large increase in K⁺ conductance, which can be attributed to the activation of ATP-sensitive K ⁺ channels (K _ATP channels), was measured. In isolated inside-out membrane patches, the ATP dependence of K_aTP channel activity was described by a sigmoid curve with K_i,_ATP (ATP concentration required for half-maximal inhibition of K _ATPchannel activity) = 8 μM and Hill coefficient (n_H) = 1.2. The single channel current-voltage relationship reversed close to the K ⁺ equilibrium potential and the conductance was approximately linear (g = 29 pS) over the voltage range included in the action potential (-60 m V to +20 mV). Conclusion: In human atrial cardiac myocytes subjected to complete metabolic inhibition, contractile failure is caused by action potential shortening resulting from an increase in K + conductance presumably through the activation of K_ATP channels. (J Cardiovasc Electrophysiol, Vol. 3, pp. 56–63, February 1992)     

泽兰合剂质量标准研究

目的；建立泽兰合剂质量控制方法。方法：采用TLC对金银花，红花进行定性鉴别，HPLC测定绿原酸的含量。结果：TLC鉴别方法专属性强。含量测定绿原酸在0.2-1.0μg间有良好的线性关系。回收率为98.67%,RSD为2.19%。结论：本法简便，准确，重现性好，可作为该制剂的质量控制方法。