老年男性心肌缺血患者心率变异分析（附67例报告）

采用正常搏动ＲＲ间期的标准差（ＳＤ）及心率变异指数（ＨＲＶ ｉｎｄｅｘ）作为指标，分析６７例老年男性心肌缺血患者的心率变异，并与正常老年男性组及正常青壮年男性组进行了对比，发现前组的ＲＲ间期ＳＤ、ＨＲＶｉｎｄｅｘ均明显低于后两组，其结果有显著性差异（Ｐ均〈０．０１）。提示心肌缺血可破坏交感与迷走神经的均衡性，造成心率变异降低。     

幽门螺杆菌粘附作用的体外研究

置幽门螺杆菌(HP)悬液于含人喉癌上皮细胞(Hep-2)或人胃癌上皮细胞(MKN-28)的培养瓶内,经2h或3.5h培养后观察HP对细胞的粘附情况。结果发现HP能成丛地粘附在上皮细胞表面,少数侵入胞浆内。HP对MKN-28粘附率明显高于对Hep-2细胞者。随菌龄的延长或菌株的变异,HP的粘附作用明显减弱。1%D-甘露糖对HP的粘附性有部分阻抑作用。     

肝动脉变异及其在肝癌介入治疗中的意义

本文收集１９９２年１月至１９９５年５月在我科作肝动脉化疗栓塞术和肝动脉化疗灌注术的中晚期肝癌１６０例，将每例病人的肝动脉造影所见与临床资料及随访结果一起进行分析。     

少见的椎体缘变异—爱神弓形椎

本文随机抽出500例腰椎片发现弓形椎变异45例,41个腰椎标本发现4个。对这种椎体下终板的对称性双凹形变异,所引起的X 线异常投影进行了观察、分级和鉴别.特别指出临床的重要性是避免与病理性椎体终板缺损相混淆。笔者结合国外首位报告文献,对发生率和发生机制进行了探讨。     

鸡柔嫩艾美耳球虫疫苗候选基因在大肠杆菌中的表达

目的构建柔嫩艾美耳球虫子孢子表面抗原原核表达载体，并且在大肠杆菌中表达。方法将本室构建的pMD-Mz5-7克隆质粒酶切回收目的片段定向亚克隆到pET-28b( )载体上，构建成原核表达载体pET-28b-Mz5-7，酶切鉴定正确后，在Escherichia coli BL21(DE3)中用IPTG诱导表达，并经SDS-PAGE及Western blotting鉴定。结果成功构建了目的抗原基因的原核重组表达质粒pET-28b-Mz5-7，IPTG诱导表达该融合蛋白，SDS-PAGE电泳表明，其能表达一分子质量约为37ku的融合蛋白，与预测分子质量相符，最佳反应条件为1mol／LIPTG诱导4h后表达量最高。薄层扫描显示表达的融合蛋白占菌体蛋白总量的18％，Western blotting结果显示，表达产物可被抗柔嫩艾美尔球虫的多克隆抗体识别，说明该融合蛋白具有很好的反应原性。结论在原核细胞融合表达Mz5-7成功，为鸡球虫病重组苗的研究奠定了基础。     

日、美、英科学家发现禽流感变异关键部位

据医药网12月20日报道，日、美、英三国科研人员对H5N1高致病性禽流感病毒的研究获重大突破，他们确定了病毒基因中两处关键部分，只要这两处发生变异，H5N1病毒就能更容易地感染人类。[第一段]     

冠脉的狭窄程度对冠心病患者心率变异性的影响

目的 :比较分析不同的冠脉狭窄程度对冠心病患者心率变异性 (HRV)的影响。方法 :观察经冠脉造影证实的 32例冠脉直径狭窄率≥ 5 0 %而 <90 %的病人 ,48例狭窄率≥ 90 %的病人及 41名健康人 2 4h白天及夜间段心率变异长程时域。结果 :冠心病患者HRV中的指标SDNN、SDANN均低于健康对照组 (P <0 .0 5 ) ,狭窄程度不同的 2组冠心病患者之间的HRV无显著性差异。结论 :冠心病患者的HRV降低 ;HRV的降低和冠脉的狭窄程度无直接关系。     

桡骨茎突处永存骨骺误诊为陈旧骨折1例分析

永存骨骺的解剖变异，常在胸、腰椎中见到，发生在桡骨茎突处少见。笔者曾遇1例桡骨茎突处永存骨骺误诊为陈旧骨折，现分析报告如下。     

NK／LAK细胞对人口腔癌耐细胞药株杀伤活性的观察

OBJECTIVE: To understand the relation between cytotoxic activity of immunologic effector cells and multidrug resistance of the tumor cells. METHODS: Continuous observation of the morphological changes and MTT colorimetry were employed to evaluate the cytotoxic activity of lymphokine-activated killer (LAK) cells and natural killer (NK) cells against multidrug-resistant (MDR) human oral carcinoma cell line-KBV200 (before and after reversal of MDR) and parental drug-sensitive cell line KB. The morphologic changes of LAK cells and the 3 target cell lines were observed continuously under inverted microscope 3 h after co-culture of LAK cells with one of three target cell lines respectively. The lysis rates of three tumor cell lines in response to co-culture with LAK or NK cells were determined using MTT colorimetry. RESULTS: In comparison with the parental drug-sensitive cell line KB, both KBV200 and its reserved cell line by verapamil (KBVV) showed earlier adherence and greater number of cells lysed by LAK. In MTT colorimetry assay, the cytotoxicity of both LAK and NK cells against the 3 cell lines was associated with the effector-to-target (E/T) cell ratio; the lysis rates of KBV200 and reversed KBV200 cells by verapamil in response to LAK and NK cells were higher than that of KB cells (P<0.05), but KBV200 and KBVV did not significantly differ (P>0.05). At the same E/T ratio, LAK cells possessed stronger cytotoxicity than NK cells against all the tumor cell lines (P<0.05). CONCLUSIONS: Immunologic effector cells possess strong cytotoxic activity against multidrug-resistant cell line KBV200. Modulation of MDR does not decrease the cytotoxic activity of the immunologic effector cells. The results of this study suggest that adoptive cell immunotherapy with immunologic effector cells may be of value in controlling the progress of MDR tumors.     

真菌病

20 0 4 0 779　唑类药物体外诱导白念珠菌耐药的初步研究/宋晓静(浙大一附院皮肤科)…∥临床皮肤科杂志.- 2 0 0 3,32 (10 ) .- 575～576将质控株及敏感白念珠菌在含不同抑菌浓度的氟康唑(FCZ)、酮康唑(K CZ)、伊曲康唑(ICZ)的液体培养基中进行人工传代诱导耐药。结果白念珠菌在高浓度的唑类药物培养基中能诱导耐药,且为交叉耐药,而在低浓度中经传2 0代仍不能诱导耐药,诱导后的耐药菌株在无药物培养基中传代可恢复敏感性。提示唑类药物能诱导耐药白念珠菌的产生,但与诱导药物的浓度有关,且为不稳定耐药。(汤亚娥)2 0 0 4 0 780　白念珠…