“…Numerous clinical and experimental data indicated that IGF-IR is involved in the tumorigenesis of breast (Surmacz, 2000), prostate (Djavan et al, 2001;Nickerson et al, 2001), pancreas (Korc, 1998), lung (Wu et al, 2000), colon (Giovannucci, 2001), liver (Scharf et al, 2001), ovary (Burroughs et al, 2002;Druckmann and Rohr, 2002), brain (Zumkeller and Schwab, 1999), and bladder (Hursting et al, 2001). The tumorigenic potential of IGF-IR usually relies on hyperactivation of IGF-I signaling.…”