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Progressive transformation of immortalized esophageal epithelial cells

World Journal of Gastroenterology 2002年第6期8卷 976-981页

作者： Zhong-Ying Shen Li-Yan Xu Min-Hua Chen Jian Shen WeiJia Cai,Department of Tumor Pathology Medical College of Shantou University,Shantou 515031,Guangdong Province,China Yi Zeng,Institute of Virology,Chinese Academy of Preventive Medicine.Beijing 100052,China Department of Tumor Pathology Medical College of Shantou University Guandong Province China. zhongyingshen@***

AIM: To investigate the progressive transformation of immortal cells of human fetal esophageal epithelium induced by human papillomavirus, and to examine biological criteria of sequential passage of cells, including cellular phenotype, proliferative rate, telomerase, chromosome and ***: The SHEE cell series consisted of immortalized embryonic esophageal epithelium which was in malignant transformation when cultivated over sixty passages without co-carcinogens. Cells of the 10th, 31st, 60th and 85th passages were present in progressive development after being transfected with HPV. Cells were cultivated in a culture flask and 24-hole cultural plates. Progressive changes of morphology, cell growth, contact-inhibition, and anchoragedependent growth characteristics were examined by phase contrast microscopy. The cell proliferation rate was assayed by flow cytometry. The modal number of chromosomes was analyzed. HPV18E6E7 was detected by Western blot methods and activities of telomerase were analyzed by *** of cells was detected with soft agar plates cultivated and with tumor formation in SCID ***: In morphological examination the 10th passage cells were in good differentiation, the 60th and 85th passages cells were in relatively poor differentiation, and the 31st passage cells had two distinct differentiations. The characteristics of the 85th and 60th passage cells were weakened at contact-inhibition and anchorage-dependent growth. Karyotypes of four stages of cells belonged to hyperdiploid or hypotriploid, and bimodal distribution of chromosomes appeared in the 31st and 60th passage cells. All of these characteristics combined with a increasing trend. The activities of telomerase were expressed in the latter three passages. Four fourths of SCID mice in the 85th passage cells and one fourth of SCID mice in the 60th passage cells developed tumors, but the cells in the 10th and 31st passage displayed no tumor ***

关键词：人胚食管上皮细胞进行性转化细胞遗传学变化端粒酶肿瘤发生

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