One of the promising approaches for enhancing the cellularresponse of chitosan is to blend it with the highly cationic polymerPoly-l-lysine (PLL) in order to improve cell attachment and prolif-eration. PLL is a homopolymer of the essential amino acid l-lysineand has been used as a standard tissue culture coating to promotecellular adhesion through electrostatic interactions. Films formedby blending PLL and chitosan have been previously fabricated toenhance cellular attachment to chitosan (Cheng et al., 2004; Zheng,Wei et al., 2009; Zheng, Zhang et al., 2009). However, no crosslink-ing was employed to stabilize the chitosan/PLL blends and noneof these investigations reports on how the repulsive forces of twopositively charged polymers might lead to leaching out of PLL.The aim of this study was to assess the chitosan/PLL blendsstability and investigate whether or not PLL leaches out from ofchitosan/PLL in an aqueous environment if no crosslinking wasapplied. The presence of highly cationic PLL in solution disruptscellular membranes and has adverse affects on cellular viability.Therefore, genipin crosslinking was applied to the chitosan/PLLblends to prepare a 2 D gel that prevents PLL dissolution, thereby toprovide a more adequate 2D culture environment for cell growthand proliferation.