scholarly journals Neoplastic human embryonic stem cells as a model of radiation resistance of human cancer stem cells

Oncotarget ◽  
2015 ◽  
Vol 6 (26) ◽  
pp. 22258-22269 ◽  
Author(s):  
Steve Dingwall ◽  
Jung Bok Lee ◽  
Borhane Guezguez ◽  
Aline Fiebig ◽  
Jamie McNicol ◽  
...  
2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Van Nguyen ◽  
Irina V. Panyutin ◽  
Igor G. Panyutin ◽  
Ronald D. Neumann

Ionizing radiation (IR) is a known mutagen that is widely employed for medical diagnostic and therapeutic purposes. To study the extent of genetic variations in DNA caused by IR, we used IR-sensitive human embryonic stem cells (hESCs). Four hESC cell lines, H1, H7, H9, and H14, were subjected to IR at 0.2 or 1 Gy dose and then maintained in culture for four days before being harvested for DNA isolation. Irradiation with 1 Gy dose resulted in significant cell death, ranging from 60% to 90% reduction in cell population. Since IR is often implicated as a risk for inducing cancer, a primer pool targeting genomic “hotspot” regions that are frequently mutated in human cancer genes was used to generate libraries from irradiated and control samples. Using a semiconductor-based next-generation sequencing approach, we were able to consistently sequence these samples with deep coverage for reliable data analysis. A possible rare nucleotide variant was identified in theKITgene (chr4:55593481) exclusively in H1 hESCs irradiated with 1 Gy dose. More extensive further studies are warranted to assess the extent and distribution of genetic changes in hESCs after IR exposure.


2016 ◽  
Vol 01 (03) ◽  
pp. 201-208 ◽  
Author(s):  
Malini Krishnamoorthy ◽  
Brian Gerwe ◽  
Jamie Heimburg-Molinaro ◽  
Rachel Nash ◽  
Jagan Arumugham ◽  
...  

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