大鼠中幼、晚幼红细胞与小鼠浆细胞瘤SP 2/0细胞融合后的光镜和电镜观察

本文报道大鼠中幼或晚幼红细胞与小鼠浆细胞瘤sP2/0细胞异种杂交后的光镜和电镜观察结果。融合后杂交细胞体积变大,微绒毛、指状突和皱褶突起减少。细胞的核质比明显变小,核内异染色质增多,核仁数目减少或消失。少数杂交细胞出现线粒体肿胀,核固缩甚至排核。长期传代的杂交细胞保持较少的表面微绒毛及皱褶突起、核质比例变小等现象,某些细胞的胞质中可见有空泡或致密颗粒。上述现象为杂交细胞去恶性提供了细胞形态以及超微结构变化的根据。本文并对杂交后细胞核、胞质及细胞表面的形态变化与去恶性之间的可能关系进行了讨论。

LIGHT AND ELECTRON MICROSCOPIC STUDIES ON HYBRIDS CROSSED BETWEEN RAT INTERMEDIATE OR LATE ERYTHROBLASTS AND MOUSE SP2/0 CELL LINE

The present study reported the observations with light and electronic micros copy on hybrid cells crossed between rat intermediate or late erythroblasts and mouse SP2/0 plasmocytoma cells. In a short period after fusion, the cell size and the ratio of nuclear heterochromatin in hybrid cells appeared to be increased, but the number of nucleoli, as well as the number of microvilli, finger-like processes, and nuclear cytoplasmic ratio were decreased. Swelling mitochondria, pycnotic nuclei and/or process of enucleation also could be seen in some hybrid cells. The subcul tured hybrid cells were characterized with less microvilli and cellular surface membrane processes, and showing marked changes in nuclear size, as well as the appearance of cytoplasmic vesicles and dense granules in some cells. The observations mentioned above provide morphological and ultrastructural evidences for the regulation of malignant phenotype of hybrid cell model we reported previously. The possible relationship between the deeancerization and the morphological changes of hybrid cell nucleus, cytoplasm and cell surface were briefly discussed.