四年中裸鼠人体鼻咽癌生物学特性的稳定性——流式细胞分析术的应用

鼻咽癌是我国最常见的头颈部恶性肿瘤之一,至今仍有不少关于鼻咽癌生物学特性的问题尚未清楚。 将人体恶性肿瘤组织移植到先天性无胸腺裸小鼠来形成裸鼠人体肿瘤已成为当前癌症研究工作的重要方法之一;它的主要基础是裸鼠人体肿瘤具有其原发人体肿瘤相     

A STUDY OF THE BIOLOGICAL CHARACTERISTICS OF HUMAN HEPATOMA XENOGRAFTS IN NUDE MICE AFTER IRRADIATION

Cell growth kinetics and changes in AFP in nude mice with human hepatoma xenografts were evaluated using the flow cytometry method. After receiving 10 Gy of radiation, the mice showed a marked delay in tumor growth; approximately 1 Gy of radiation caused a tumor growth delay of one day. Irradiation altered various phases of the cell cycle. An acute and temporary block of G2 cells was characteristic; FCM measurements demonstrated that about 58% of cells were blocked in the G2 phase and this blocking effect lasted 90 hours after an irradiation of 10 Gy. This indicated that human hepatoma xenografts in nude mice were quite sensitive to irradiation. It was also noted that the AFP decreased for 96 hours after irradiation. Changes in G2 cells after irradiation may be closely related to changes in AFP.     

人体鼻咽癌裸鼠移植瘤若干异质性的测定

应用流式细胞计检测第33代人鼻咽癌裸鼠移植瘤的中心与外周部位DNA含量。结果表明:较大肿瘤(瘤重≥0.59g)的中心部位DNA含量高于外周部位(P<0.05),而较小肿瘤(瘤重<0.59g)不同部位的DNA含量无明显差异;且瘤重≥0.27g的肿瘤,其中心部位的增殖指数低于周边部位(P<0.05)。     

肺癌细胞AgNOR计数与DNA含量测定之间相关性研究

目的研究肺癌细胞ＤＮＡ倍体类型和核仁组织区嗜银蛋白（ＡｇＮＯＲ）及两者之间的相互关系。方法对３６例肺癌石蜡标本进行细胞ＡｇＮＯＲ定量计数和ＤＮＡ含量的流式细胞术（ＦＣＭ）检测。检测结果进行ｔ检验和Ｘ２检验。结果二倍体肺癌细胞ＡｇＮＯＲ计数（１．６５±０．８７）显著低于异倍体肺癌细胞者（３．０９±１．０３）细胞周期中Ｓ期细胞＜２０％的肺癌细胞ＡｇＮＯＲ计数（１．３８±１．０２）显著低于Ｓ期细胞≥２０％者（２．７７±１．１４）。在二倍体肿瘤中，分化Ⅱ级和Ⅲ级细胞的ＡｇＮＯＲ计数显著高于分化Ⅰ级者，但在Ⅱ、Ⅲ级之间ＡｇＮＯＲ计数则无显著差异；分化Ⅲ级肿瘤的异倍体检出率显著高于分化Ⅰ、Ⅱ级肿瘤，但在Ⅰ、Ⅱ级之间异倍体检出率则无显著差异。结论细胞ＤＮＡ含量和ＡｇＮＯＲ计数与肺癌细胞的增殖状态、恶性程度及预后有密切相关性；在病理分级中以上两种检测具有互补性。