Neoplastic transformation of human diploid fibroblasts (KMST‐6) by treatment with 60Co gamma rays

Neoplastic transformation of human diploid fibroblasts (KMST‐6) by treatment with 60Co gamma rays
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60Co 伽马射线处理人二倍体成纤维细胞 (KMST-6) 的肿瘤转化

DOI:
--
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发表时间:
1985
影响因子:
6.4
通讯作者:
T. Kimoto
T. Kimoto
中科院分区:
医学1区
文献类型:
--
作者:
M. Namba;K. Nishitani;F. Hyodoh;F. Fukushima;T. Kimoto

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通过用60 Co γ射线照射重复处理,将来自人胚胎的正常成纤维细胞(KMS-6)在培养物中转化为肿瘤细胞(KMST-6)。重复处理是必要的,以获得转化。对照正常细胞显示正常核型(46,XX),并且在第40代时由于细胞老化而停止分裂。转化细胞目前无限生长(第140代),并表现出明显的核畸变,包括数量和结构。这两个特征,无限生长和异常核型,被认为是人类成纤维细胞肿瘤转化的最重要参数。其他不可或缺的参数是融合细胞片上存在活跃的有丝分裂像和集落类型形态。转化的细胞生长成具有相对光滑边缘的集落,而正常的成纤维细胞由于生长的成纤维细胞的突出而形成具有锯齿状边缘的集落。其他参数,如提高平板接种效率,增强软琼脂中的菌落形成,低血清生长,高饱和密度,和收购的可移植性,是不可靠的转化的早期阶段。这些参数可能出现在相当晚的阶段的转化后,几个细胞分裂。除其他特征外,转化的KMST-6细胞显示葡萄糖-6-磷酸脱氢酶的B-型同工酶谱、人源乳酸脱氢酶同工酶谱、无病毒感染证据且不产生C-型病毒颗粒。
Normal fibroblasts (KMS‐6) derived from a human embryo were transformed in culture into neoplastic cells (KMST‐6) by repeated treatment with 60Co gamma ray irradiation. Repeated treatment was necessary to obtain transformation. Control normal cells exhibited normal karyotype (46, XX) and stopped dividing due to cellular ageing at the 40th passage. The transformed cells are presently growing indefinitely (140th passage) and exhibit prominent karyologic aberrations, both numerical and structural. These 2 characteristics, indefinite growth and abnormal karyotype, are thought to be the most important parameters for neoplastic transformation of human fibroblasts. Other indispensable parameters are the presence of active mitotic figures on confluent cell sheets and colony‐type morphology. Transformed cells grow into colonies with relatively smooth edges, while normal fibroblasts form colonies with jagged edges, due to the protrusion of growing fibroblasts. Other parameters, such as elevated plating efficiency, enhanced colony formation in soft agar, low serum requirement for growth, high saturation density, and acquisition of transplantability, are not reliable in the early stages of transformation. These parameters probably appear at rather later stages of transformation following several cell divisions. Among other characteristics, the transformed KMST‐6 cells exhibit a B‐type isozyme pattern of glucose‐6‐phosphate dehydrogenase, lactate‐dehydrogenase isozyme pattern of human origin, no evidence of viral infection and no production of C‐type virus particles.
着色性干皮病细胞中紫外线诱导的二倍体人成纤维细胞肿瘤转化的频率高于正常细胞。
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