“…Gemcitabine (2′,2′-difluoro-2′-deoxycytidine, abbreviated as dFdCyd) is a nucleoside analog that is clinically used to treat patients with different types of cancer such as pancreatic, non-small cell lung and metastatic breast cancer (Bernhard et al, 2008;Burris et al, 1997;Chew et al, 2009;Crino et al, 1998;Yardley et al, 2008;Zatloukal et al, 1998). In vitro studies have demonstrated that dFdCyd can enhance cell killing by ionizing radiation (termed "radiosensitization") in colorectal, breast, pancreatic, ovarian, and non-small cell lung cancer cell lines McGinn et al, 1996;Robinson and Shewach, 2001;Robinson et al, 2003;Shewach et al, 1994).…”