"Evaluation of localization of WRN signals demonstrated that WRN does not leave the nucleolus after irradiation. The WRN signal was not detected at the telomere sides but H2AX was detected at the telomeric sides. Thus the WRN protein is not involved in irradiation-induced DNA damage/repair even at telomeric sides in human mesenchymal stem cells (hMSC) and hMSC-telomere 1."xsd:string