“…The mostly use somatic cells are fibroblasts, but different groups generated also iPS cells from other somatic cells providing evidence that is possible to reprogram cells of different origins (Deng, 2010;Ebben et al, 2011;Patel and Yang, 2010;Uemura et al, 2012;Vitale et al, 2011;Walia et al, 2012;Wong and Chiu, 2011;Zeng and Zhou, 2011). Other sources of iPSCs that can be easily reprogrammed are human keratinocytes (Aasent et al, 2008;Petit et al, 2012), oral mucosa fibroblasts (Miyoshi et al, 2010), dermal papilla cells (Tsai et al, 2010), pancreatic beta cells (Stadtfeld et al, 2008), neural stem cells (Kim et al, 2009), mature B lymphocytes (Hanna et al, 2008), liver and stomach cells (Aoi et al, 2008) and cord blood cells (Cai et al, 2010;Takenaka et al, 2009). For example, human keratinocytes have been shown to be 100-fold more efficient and 2-fold faster than human fibroblasts (Aasent et al, 2008).…”