“…Periostin has a typical signal sequence, followed by a cysteine-rich domain, four repeated and conserved domains and a C-terminal hydrophilic domain (Takeshita et al, 1993;Horiuchi et al, 1999). A similar structure was reported for fasciclin I, a cell adhesion molecule involved in the development of the central nervous system of insects (Zinn et al, 1988), and for the big-h3 molecule, a secreted protein induced by TGF-b1 which promotes the attachment and spreading of fibroblasts (Skonier et al, 1992;LeBaron et al, 1995). Periostin was found to be overexpressed in various types of human cancer such as lung (Sasaki et al, 2001a), brain (Sasaki et al, 2002), ovary (Gillan et al, 2002), breast (Shao et al, 2004) and colon cancers Tai et al, 2005) and elevated levels have been detected in sera of patients with thymoma (Sasaki et al, 2001b), non-small lung carcinoma (Sasaki et al, 2001c) and breast cancer (Sasaki et al, 2003).…”