排序方式: 共有8条查询结果,搜索用时 15 毫秒
1
1.
本文资料表明:(1)纯化 AFP 有抑制巨噬细胞功能的作用。(2)AFP 阳性肝癌血清同样显示这种抑制作用,当去除 AFP 后抑制作用得到不同程度的解除。(3)患肝癌大鼠淋巴组织内,AFP 有特异性聚集的现象。根据以上实验,本文认为 AFP是一种免疫抑制因子,并推测这种抑制作用与 AFP 改变巨噬细胞表面电荷有关。 相似文献
2.
3.
本文对肝细胞癌的手术切除标本和少数尸检的肝癌不伴肝硬化者142例,作为对照用的肝细胞癌伴有肝硬化者50例的肝标本进行组织学研究,探讨肝癌不伴肝硬化的病因和组织发生学。结果:(1)两组肝癌有相似的肝病背景,NCH组合并乙型肝炎51.41%、地衣红阴性肝炎48.59%。CH组合并乙型肝炎58.00%、地衣红阴性肝炎42.00%。两组有原发性多发癌5例。认为人体肝癌在发病学上为综合因素所致。设想NCH为致癌物作用弱,对肝实质破坏较轻,但机体对肝癌的易感性强,癌前期较短,故发癌年龄较早。(2)NCH组卵圆细胞增殖为80.99%,CH组增殖为100%,两组存在显著差别。它的增殖可能是一种修复反应。但在致癌物作用下,由于卵圆细胞发育障碍可能为分化差的肝癌和腺管型肝癌的来原。因此,在肝癌组织发生中应得到重视。(3)NCH组的肝细胞不典型增生29.57%,CH组为70.00%,两组存在显著差别,它的增生可能是癌前病变。 NCH组中的卵圆细胞增殖和肝细胞不典型增生明显低于CH组,说明NCH组肝实质受损较轻,因而NCH发生率较CH低。 相似文献
4.
5.
6.
Oncogene(以下简为One)是从Onc gene和Transforming gene等词形和词意演化而来,国内一般译为“癌基因”或“致癌基因”。 Onc本质上是DNA片段。这种DNA片段有特定的核苷酸排列顺序,能在体外把培养的易感细胞(最常用的是处于癌前阶段的NIH/3T3小鼠成纤维母细胞株)转化为具有类似体内瘤细胞表型特征的转化细胞。最先仅在逆转录病毒基因组内发现了Onc,总称为V-Onc,V表示病毒。各种Onc的 相似文献
7.
This work was undertaken to investigate the etiology and histo-genesis of non-cirrhotic hepatocellular car-cinoma(NCH)in humanbeings.Among the 142 cases of NCH studied,135 were samplesobtained from surgical resection and 7 from autopsy.Fifty speci-mens from cirrhotic hepatocellular carcinoma(CH)were taken ascontrol(42 from operated material and 8 from autoptic material.,The results were as follows:1.Hepatitis B liver diseases and Orcein negative hepatitis liverdiseases accounted for 51.41% and 48.59% in NCH group,and 58.00%and 42.00% in CH group,suggesting that the two groups had asimilar background of liver diseases.2.The proliferation of oval cells was found to be 80.99% inNCH group and 100% in CH group(the difference was statisticallysignificant).It is suggested that oval cells exposed to carcinogensmight develop into poorly differentiated and adenoid type of livercancer.3.Hepatocyte dysplasia was found to be 29.57% and 70.00%in NCH and CH group respectively,and there was a significantdifference between the two groups of HCC.We believe that dys-plasia may be a precancerous disorder. 相似文献
8.
本文采用22厘米长管和一定比例的Ampholyte等电聚焦—交叉电泳和等电聚焦—交叉电泳放射自显影术分析了人体胎儿血清和肝癌患者血清AFP的变种。胎儿AFP可以有十个变种,pI值分别为AFP1 4.70,AFP2 4.85,AFP3 5.12,AFP4 5.28,AFP5 5.48,AFP6 5.62,AFP7 5.76,AFP8 5.81,AFP9 5.95和AFP10 4.56。原发性肝癌血清的AFP仅四个变种,分别相当于胎儿的AFP1,AFP2,AFP5和AFP6。此外还观察了AFP1—5各变种对神经氨酸酶的敏感性、热失活的动力学行为等,彼此性质并不一致。根据上述结果,本文认为AFP各变种不是假象,并对可能的应用前景进行了讨论。 相似文献
1