丁酸对人肺癌细胞的生长,细胞周期和形态的影响

运用鉴别细胞群体生物学特性的常规方法和流式细胞光度术(FCM),我们研究了正了酸对人肺癌细胞(PLA-801D)的某些生物学作用。当培养液中含2或3mmol/L丁酸时,细胞分裂和增生受到明显抑制,群体倍增时间几乎延长1倍,细胞周期行进受阻,大多数细胞阻断在G1期,平皿集落形成率从23.9％降为1.9％,饱和密度从237.4万/ml降至48.8万/ml,细胞群体提前3d进入饱和状态。与此同时,细胞变扁平,几乎丧失叠堆生长能力,表面膜活动减弱,核形趋于规则,染色质颗粒分散变稀疏,细胞间粘着连接明显增多。以上发现提示丁酸可使PLA-801D肺癌细胞获得一些相对正常的生长特性和表型,显示丁酸对该细胞有一定程度的分化诱导作用和潜在的抗癌作用。     

血清淀粉样蛋白A—一种新的载脂蛋白ApoSAA

血清淀粉样蛋白Ａ── 一种新的载脂蛋白ＡｐｏＳＡＡ余立清，余铭鹏血清淀粉样蛋白Ａ（ｓｅｒｕｍａｍｙｌｏｉｄＡ，ＳＡＡ）是由同一簇基因编码的一组多形性蛋白。它们存在于各种哺乳动物和禽类中。急性和许多慢性炎症时，血浆８ＡＡ水平明显升高。过去偏重研究ＳＡＡ?..     

Quantitative analysis of butyric acid-induced nuclear ultrastructural alterations in cells of human lung giant cell carcinoma in vitro

The effects of butyric acid(BA)on the nuclear ultrastructure of humanlung giant cell carcinoma(Strain PLA-801 D)were observed with digital imageprocessing.It was found that the length of the nuclear circumference of the tu-mor cells incubated with 2mmol of BA was approximately equal to that of thecontrol whereas the nuclear area was increased by 1.4times,which implies thatthe nuclear profile tends to become more regular after BA treatment.In addition,the optical density of the nuclei of the experimental group decreased significantlyas compared with that of the control,which indicates that the chromatin in thenuclei was decreased by BA.It was concluded on the basis of the findings thatBA may have a biological effect of reverse-transformation on the malignant cells.     

Advances in the pathogenesis of atherosclerosis.

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脑心通灵治疗冠心病血液流变指标观察

脑心通灵为纯中药制剂，由三七、丹参、栀子、党参、酸枣仁等十余味中药组成。经动物毒理实验证实无毒副作用，动物和人群药物试验表明：该药能明显扩张血管，改善微循环，抑制血小板聚集。而无凝血酶原时间延长，且能提高血氧饱和度，具有抗缺氧、抗休克作用，对缺氧状态心脏具有保护作用，提高心肌作功效率，降低心肌氧耗。经初步临床研究表明该药对冠心病有较好疗效。本研究较详细观察了脑心通灵对冠心病的治疗作用。     

丁酸引起人肺巨细胞癌胞核超微结构变化的定量分析——数字图象处理

本文旨在应用数字图象处理技术研究丁酸对人肺巨细胞癌PLA-801D细胞株胞核超微结构的影响。癌细胞在含2 mmol丁酸的条件下培养4天后,同对照组相比,胞核的周长无明显变化,但胞核面积比对照组者约大1.4倍,说明丁酸处理后癌细胞核外形趋向规则。实验组胞核的光密度比对照组者明显降低(后者比前者大2.7倍),表明丁酸作用后胞核中的染色质颗粒减少。结果提示丁酸可能具有促使恶性细胞胞核的某些恶性表型逆转化的生物学效应。