BACKGROUND: Mounting evidence suggests that tumors are histologically heterogeneous and are maintained by a small population of tumor cells termed cancer stem cells. CD133 has been identified as a candidate marker of cancer stem cells in laryngeal carcinoma. This study aimed to analyze the chemoresistance of CD133(+) cancer stem cells. METHODS: The response of Hep-2 cells to different chemotherapeutic agents was investigated and the expression of CD133 was studied. Fluorescence-activated cell sorting analysis was used to identify CD133, and the CD133(+) subset of cells was separated and analyzed in colony formation assays, cell invasion assays, chemotherapy resistance studies, and analyzed for the expression of the drug resistance gene ABCG2. RESULTS: About 1% - 2% of Hep-2 cells were CD133(+) cells, and the CD133(+) proportion was enriched by chemotherapy. CD133(+) cancer stem cells exhibited higher potential for clonogenicity and invasion, and were more resistant to chemotherapy. This resistance was correlated with higher expression of ABCG2. CONCLUSIONS: This study suggested that CD133(+) cancer stem cells are more resistant to chemotherapy. The expression of ABCG2 could be partially responsible for this. Targeting this small population of CD133(+) cancer stem cells could be a strategy to develop more effective treatments for laryngeal carcinoma.
BACKGROUND: Mounting evidence suggests that tumors are histologically heterogeneous and are maintained by a small population of tumor cells termed cancer stem cells. CD133 has been identified as a candidate marker of cancer stem cells in laryngeal carcinoma. This study aimed to analyze the chemoresistance of CD133(+) cancer stem cells. METHODS: The response of Hep-2 cells to different chemotherapeutic agents was investigated and the expression of CD133 was studied. Fluorescence-activated cell sorting analysis was used to identify CD133, and the CD133(+) subset of cells was separated and analyzed in colony formation assays, cell invasion assays, chemotherapy resistance studies, and analyzed for the expression of the drug resistance gene ABCG2. RESULTS: About 1% - 2% of Hep-2 cells were CD133(+) cells, and the CD133(+) proportion was enriched by chemotherapy. CD133(+) cancer stem cells exhibited higher potential for clonogenicity and invasion, and were more resistant to chemotherapy. This resistance was correlated with higher expression of ABCG2. CONCLUSIONS: This study suggested that CD133(+) cancer stem cells are more resistant to chemotherapy. The expression of ABCG2 could be partially responsible for this. Targeting this small population of CD133(+) cancer stem cells could be a strategy to develop more effective treatments for laryngeal carcinoma.
Authors: Tomasz Kolenda; Weronika Przybyła; Marta Kapałczyńska; Anna Teresiak; Maria Zajączkowska; Renata Bliźniak; Katarzyna M Lamperska Journal: Rep Pract Oncol Radiother Date: 2018-03-17
Authors: A Greco; Maria Ida Rizzo; A De Virgilio; A Gallo; M Fusconi; G Pagliuca; S Martellucci; R Turchetta; M De Vincentiis Journal: Eur Arch Otorhinolaryngol Date: 2015-11-19 Impact factor: 2.503
Authors: Stefanie Galbán; Yong Hyun Jeon; Brittany M Bowman; James Stevenson; Katrina A Sebolt; Lisa M Sharkey; Michael Lafferty; Benjamin A Hoff; Braeden L Butler; Susan S Wigdal; Brock F Binkowski; Paul Otto; Kris Zimmerman; Gediminas Vidugiris; Lance P Encell; Frank Fan; Keith V Wood; Craig J Galbán; Brian D Ross; Alnawaz Rehemtulla Journal: PLoS One Date: 2013-06-11 Impact factor: 3.240