“…Other substances formulated as hydrogels include chitosan from crustacean shells, fibrin (a blood-clotting polymer), alginate extracted from seaweed [Eiselt et al, 2000;Kuo and Ma, 2001;Chen et al, 2003;Wang et al, 2003] and Puramatrix, a synthetic polypeptide hydrogel [Bokhari et al, 2005]. Hydrogels prepared from tissue extracts include Amgel [Siegal et al, 1993], Humatrix [Kedeshian et al, 1998] and Matrigel [Kleinman et al, 1982[Kleinman et al, , 1986Kleinman and Martin, 2005]. Small intestinal submucosa, an ECM scaffold containing endogenous growth factors, has been used for several other tissue engineering applications [Hoddle, 2002;Cimini et al, 2005;Zhang et al, 2005] and may also be suitable for adipose engineering, as adipose tissue has grown into the scaffold in other applications [Badylak et al, 2003].…”