Biological features of CD90+ tumor stem cells in ovarian cancer
10.3969/j.issn.2095-4344.2016.10.014
- VernacularTitle:卵巢癌CD90+肿瘤干细胞的生物学特性
- Author:
Zhihui LIU
;
Zhihui XIANG
- Publication Type:Journal Article
- Keywords:
Neoplastic Stem Cels;
Ovarian Neoplasms;
Antigens,Thy-1;
Tissue Engineering
- From:
Chinese Journal of Tissue Engineering Research
2016;20(10):1468-1473
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND:Thinking from ovarian cancer stem cel theory shows that: in the tumor cels, there are a fraction of stem cels with self-renewing ability and multipotent differentiation, which are the root causes of ovarian cancer recurrence and drug resistance. Studies have shown that CD90 can be used as a surface marker of mesenchymal stem cels and stem cels of other cancers.
OBJECTIVE:To explore the biological features of CD90+ tumor cels from ovarian cancer tissues.
METHODS: Primary ovarian cancer cels were isolated from the abdominal dropsy of ovarian cancer patients to sort CD90+ and CD90- cels using flow cytometry. RT-PCR was used to detect expressions of stem cel-related genes and epithelial to mesenchymal transition-related genes. Cel invasion was observed by Transwel invasion assay, cel proliferation and differentiation observed by clone formation assay, stem cel potential observed by suspension sphere-forming assay, and tumor formation rate observed byin vivo tumorigenicity experiment.
RESULTS AND CONCLUSION:Compared with the CD90- cels, the expressions of CD44, CD133, ALDH1, N-cad and Vimentine were significantly higher in the CD90+cels (P < 0.05), but the expression of E-cad was significantly decreased in the CD90+ cels (P < 0.05). Tumor formation rates of CD90- and CD90+ cels were increased significantly with the increase of seeded cel number, which was more obvious in CD90+ cels. The number of transmembrane cels, the number of cel clones and the number of suspended spheres were significantly higher in the CD90+ cels than the CD90- cels (P < 0.05). Experimental findings from this study show that CD90+ cels highly express epithelial to mesenchymal transition-related genes and stem cel-related genes, with higher invasion, proliferation and differentiation, in vivo tumorigenicity and potential of stem cels. CD90+ cel separation may be a new method to separate ovarian cancer stem cels.
