缺氧早期大鼠心肌细胞微管损害的观察

目的 了解缺氧早期心肌细胞微管损害程度。方法将分离培养的Wistar大鼠心肌细胞分为正常组、缺氧组（建立缺氧细胞模型并设缺氧10、20、30、60min为观察时相点）。用激光共聚焦显微镜及扫描电镜观察2组细胞微管分布、形态变化，对微管蛋白荧光强度进行半定量分析．用蛋白质印迹法检测2组细胞游离d微管蛋白的表达。结果 与正常组比较，缺氧10min后，缺氧组细胞微管念珠状结构消失，但排列尚有规律、数量无明显减少；缺氧20min不仅念珠状结构消失，而且微管排列散乱，远离胞核区出现微管缺失；缺氧30、60min时微管发生扭曲、断裂，纹理紊乱，完全丧失规律性。缺氧组心肌细胞微管蛋白荧光强度较正常组下降，且随缺氧时间延长愈加明显；缺氧组心肌细胞内游离的α微管蛋白表达（缺氧10min为46644±145）高于正常组（13357±98），两组比较，差异有统计学意义（P〈0．01），随缺氧时间的延长此升高趋势愈加明显。结论在缺氧状态下，心肌细胞微管发生解聚时间较早，其结构和分布规律被破坏。微管解聚在缺氧所致心肌细胞早期病理损害中的作用值得深入研究。     

氟伐他汀对环孢素A所致大鼠成纤维细胞肾毒性的保护作用

目的 观察免疫抑制剂环孢素Ａ（CsA）对大鼠肾脏成纤维细胞增殖及细胞因子表达的影响以及氟伐他汀的干预作用，探讨氟伐他汀对CsA肾毒性的保护作用。 方法 体外培养大鼠肾脏成纤维细胞，四甲基偶氮唑盐（MTT）比色法测定CsA及氟伐他汀对细胞增殖的影响。RT-PCR方法检测转化生长因子β1（TGF-β1）、结缔组织生长因子（CTGF）及c-fos mRNA水平。Western印迹检测纤连蛋白(FN)的表达。 结果 CsA可明显抑制成纤维细胞增殖，且呈剂量和时间依赖效应（P < 0.05）。氟伐他汀与CsA合用后，对细胞增殖有明显的抑制作用（P < 0.01）。CsA刺激成纤维细胞TGF-β1、CTGF、c-fos及FN的产生（P < 0.05），氟伐他汀可下调这些改变（P < 0.05）。 结论 氟伐他汀可减轻CsA所致的大鼠肾脏成纤维细胞毒性     

老年人免疫功能异常变化的临床观察及其评价(Ⅰ)

老年人生理适应与防卫能力进行性下降,对有害因子易伤性增加,导致多种老年病的发生。因此,免疫系统功能与衰老的关系问题,已是现代老年病学和免疫学进行多方深入研究的重要内容。我们近两年多来对老年人免疫功能变化做了临床观察检测与统计分析。现报告如下。 1.临床资料     

Morphometrically estimated variation in nuclear size

Summary At present there are several grading systems for prostatic carcinoma. Most are difficult to reproduce. An objective method of grading seems to be necessary and could make comparisons between various groups of patients easier and grading more reliable.In the present study morphometrically estimated nuclear size and variation in nuclear size are matched with the survival rates of 207 patients who underwent total perineal prostatetomy for cancer. On the basis of morphometrically estimated variation in nuclear size the patients could be divided into two groups with significantly differing survival rates. In this way it was possible to split the group of patients with grade 2 carcinoma (Mostofi's grading system) into two groups of patients with significantly different survival rates. The survival rates in these two groups did not differ significantly from those in the patients with Grade 1 and Grade 3 tumors respectively.The results are discussed in the light of the recent literature on the subject. Morphometry seems to be a valuable tool in grading prostatic cancer.     

检测胞浆抗原用于急性白血病免疫分型

目的:探讨胞浆抗原在急性白血病免疫分型中的临床意义。方法:用流式细胞仪检测42例初治急性白血病患者胞浆抗原CyCD_3,CyCD_(22),CyCD_(79a)和MPO。结果:T—ALL阳性胞浆抗原主要表达在CyCD_3,阳性率占88.9％。B—ALL阳性胞浆抗原主要表达在CyCD_(79a),AML主要表达CyMPO。结论:CyCD_3和CyCD_(79a),及MPO可分别作为T—ALL,B—ALL和AML系列特异性标志,对正确诊断白血病提供非常有价值的依据。     

脑水肿对大鼠血脑屏障内皮细胞膜表面ICAM—1表达量的影响

采用液氮冷冻Ｗｉｓｔａｒ大鼠－侧大脑制成血管源性脑水肿模型，将大怀脑冷冻中心制成冠状面冰冻切片，运用免疫组化染色观察脑水肿组及对照组白质脑屏障内皮细胞表面ＩＣＡＭ－１蛋白表达量的变化 。     

天麻素对缺血再灌注神经细胞膜的保护作用

用新生Wistar大鼠大脑皮层进行神经细胞培养 ,将培养 8d的神经细胞置于模拟“缺血”状态下 ,5h后神经细胞发生肿胀 ,胞内乳酸脱氢酶 (LDH)漏出增加 ,膜流动性下降、脂质过氧化(LPO)含量增加 ;将经过“缺血”损伤神经细胞置 1 8h模拟“再灌注” ,“再灌注”后细胞数目明显减少 ,LDH的漏出、膜流动性下降和LPO增加继续加重 ,说明细胞损伤进一步加重。经过天麻素孵育后的神经细胞“缺血”或“再灌注”后LDH的漏出及LPO含量明显低于损伤组 ,而膜流动性则明显高于损伤组。表明 :天麻素对体外培养神经细胞的缺血再灌注损伤有保护作用     

评价酶联免疫检测血清CYFRA21—1对非小细胞肺癌的诊断价值

目的评价检测ＣＹＦＲＡ２１┐１对非小细胞肺癌的诊断价值。方法用ＥＬＩＳＡ法测定７０例肺癌（ＬＣ）其中４７例非小细胞肺癌（ＮＳＣＬＣ），３例小细胞肺癌（ＳＣＬＣ）和２０例未分型肺癌、６４例肺部良性疾病患者及４０例健康人血清ＣＹＦＲＡ２１┐１浓度。试验的诊断性能用相对操作特征（ＲＯＣ）分析法估测之。结果测得全阈诊断准确率（ＯｖｅｒａｌＤｉａｇ┐ｎｏｓｔｉｃＡｃｃｕｒａｃｉｅｓ）ＬＣ为０．７５、ＮＳＣＬＣ为０．７６，ＳＱＣ为０．８３，ＡＤＥ为０．６７和ＳＣＬＣ为０．３８。在相应于特异性为０．９５的界定值３．４７μｇ／Ｌ处，各型的灵敏度分别为ＳＱＣ０．６２，ＬＣ０．５３，ＮＳＣＬＣ０．５１，ＡＤＥ０．４８和ＳＣＬＣ０．００。结论结果显示ＣＹＦＲＡ２１┐１是ＮＳＣＬＣ较灵敏和特异的一个标志物。未观察到ＴＮＭ各期间该标志物的平均水平有明显的差异；然而异常升高水平的患者的比例随病期的进展而显著增加，提示一系列检测ＣＹＦＲＡ２１┐１水平可能有助于监查ＮＳＣＬＣ患者的疗效。     

Cholinesterases and peanut agglutinin binding related to cell proliferation and axonal growth in embryonic chick limbs

Embryonic cholinesterases are assigned important functions during morphogenesis. Here we describe the expression of butyrylcholinesterase and acetylcholinesterase, and the binding of peanut agglutinin, and relate the results to mitotic activity in chick wing and leg buds from embryonic day 4 to embryonic day 9. During early stages, butyrylcholinesterase is elevated in cells under the apical ectodermal ridge and around invading motoraxons, while acetylcholinesterase is found in the chondrogenic core, on motoraxons and along the ectoderm. Peanut agglutinin binds to the apical ectodermal ridge and most prominently to the chondrogenic core. Measurements of thymidine incorporation and enzyme activities were consistent with our histological findings. Butyrylcholinesterase is concentrated near proliferative zones and periods, while acetylcholinesterase is associated with low proliferative activity. At late stages of limb development, acetylcholinesterase is concentrated in muscles and nonexistent within bones, while butyrylcholinesterase shows an inverse pattern. Thus, as in other systems, in limb formation butyrylcholinesterase is a transmitotic marker preceding differentiation, acetylcholinesterase is found on navigating axons, while peanut agglutinin appears in non-invaded regions. These data suggest roles for cholinesterases as positive regulators and peanut-agglutinin-binding proteins as negative regulators of neural differentiation.