乙醛脫氫酶1作為喉癌Hep-2細(xì)胞系腫瘤干細(xì)胞標(biāo)志物的實驗研究及初步臨床分析
[Abstract]:Objective to investigate the expression of acetaldehyde dehydrogenase 1 (aldehyde dehydrogenase1,ALDH1) in human laryngeal carcinoma Hep-2 cell line and to observe the growth characteristics of different ALDH1 subsets in vitro. Methods fluorescent cytochemical staining and flow cytometry were used to observe and detect the expression of ALDH1 in Hep-2 cell line of laryngeal carcinoma, and ALDH1~ (br) subsets were isolated by flow sorting, and the proliferative ability of different subsets of ALDH1 was detected by MTT assay. The extracellular differentiation ability of ALDH1~ (br) subpopulations was detected by dynamic flow cytometry. Results the expression of ALDH1 was different in Hep-2 cell line of laryngeal carcinoma, among which 2.9 鹵0.6% of the cells showed high expression of ALDH1. The proliferation ability of ALDH1~ (br) subsets was higher than that of ALDH1low subsets and unsorted cells, and in the culture medium containing serum, the proliferation ability of ALDH1~ (br) subsets was higher than that of unsorted cells. After 6 days of culture, ALDH1 ~ (br) subsets decreased from 94.2 鹵3.8% to pre-sorting level. Conclusion the ratio of ALDH1 ~ (br) subsets in laryngeal carcinoma Hep-2 cell lines is less than that of ALDH1 ~ (br) subsets, which has strong ability of differentiation and proliferation in vitro. Objective to detect the tumorigenic ability of different expression subsets of ALDH1 and to establish ALDH1 as a marker of tumor stem cells in Hep-2 cell line of laryngeal carcinoma. Methods the cell growth of different subsets was observed by HE staining and the cell cycle distribution of ALDH1~ (br) subgroup and ALDH1low subgroup were detected by flow cytometry. Three groups of cells were injected subcutaneously into shoulder and nape of nude mice with the order of 5 脳 10 ~ 4 to observe the tumorigenesis of each group. Results the cells in each group were similar in growth state and had the basic growth morphology of tumor cells, and the cell cycle distribution of each group was not different. The tumorigenic time of ALDH1 ~ (br) subgroup cells was shorter, and the tumor growth rate was faster than that of the other two groups. There was statistical difference (P < 0.05). Conclusion compared with ALDH1low subsets and unsorted cells, ALDH1~ (br) subsets have strong tumorigenic ability. ALDH1 can be used as a marker of tumor stem cells in Hep-2 cell line of laryngeal carcinoma. Objective to investigate the expression of acetaldehyde dehydrogenase 1 in laryngeal carcinoma and its clinicopathological significance. Methods from January 2004 to December 2006, 86 cases of laryngeal carcinoma and their normal laryngeal tissues were detected by immunohistochemical Elivision method. The correlation was analyzed with clinicopathological features. Results there was no or low expression of ALDH1 in normal laryngeal tissues, but no significant correlation was found between the expression of ALDH1 in 25 cases of laryngeal carcinoma and age, the location of laryngeal carcinoma, the extent of invasion, and the clinical stage (P0.05). The expression of ALDH1 in patients with lymph node metastasis was significantly higher than that in patients with negative lymph nodes (P0.05), and the 5-year survival rate in patients with positive ALDH1 was significantly lower than that in patients with negative ALDH1 (P0.05). Conclusion the high expression of ALDH1 in laryngeal carcinoma is related to lymph node metastasis and can be used as an important prognostic factor to evaluate the prognosis of laryngeal carcinoma.
【學(xué)位授予單位】:蚌埠醫(yī)學(xué)院
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2011
【分類號】:R739.65
【共引文獻】
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