title: Heparin-modified gelatin scaffolds for human corneal endothelial cell transplantation.
abstract: Although one of the most transplanted tissues, a shortage of cadaveric corneas for transplantation still exists in the western society and elsewhere. The goal of this study was to develop a biological scaffold to support transfer of cultured human corneal endothelial cells (HCECs) into the anterior chamber of the eye, potentially a replacement for cadaveric donor tissue. A series of transparent scaffolds were fabricated from gelatin and modified with heparin. Mechanical parameters of the scaffolds, such as stiffness, affected cell proliferation, phenotype and cell surface marker expression were determined. The heparin-modified scaffolds had a greater capacity to absorb basic fibroblast growth factor (bFGF) and showed better release kinetics for up to 20 days. The release of bFGF from the scaffolds improved HCECs survival and reduced cellular loss. The scaffolds were flexible and could be folded and implanted in rabbits' eyes, through a small incision in the cornea. The scaffolds adhered to the inner surface of the corneal stroma and gradually integrated with the surrounding tissue. These results indicate that gelatin based corneal scaffolds modified to absorb and release growth factors and seeded with HCECs, might be a suitable alternative for cadaveric cornea transplantation.
authors: Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Wake Forest Baptist Medical Center, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
authors: Guoguang
authors: G
authors: Niu
authors: Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Wake Forest Baptist Medical Center, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
authors: Jin-San
authors: JS
authors: Choi
authors: Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Wake Forest Baptist Medical Center, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
authors: Zhan
authors: Z
authors: Wang
authors: Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Wake Forest Baptist Medical Center, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
authors: Aleksander
authors: A
authors: Skardal
authors: Department of Ophthalmology, Wake Forest School of Medicine, Wake Forest Baptist Medical Center, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
authors: Matthew
authors: M
authors: Giegengack
authors: Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Wake Forest Baptist Medical Center, Medical Center Boulevard, Winston-Salem, NC 27157, USA. Electronic address: ssoker@wakehealth.edu.
authors: Shay
authors: S
authors: Soker
mesh_terms: D000818:Animals; D049109:Cell Proliferation; D017690:Cell Transplantation / Q000379:methods*; D002478:Cells, Cultured; D004285:Dogs; D004728:Endothelium, Corneal / Q000166:cytology*; D004847:Epithelial Cells / Q000166:cytology*; D005780:Gelatin / Q000737:chemistry*; D006493:Heparin / Q000737:chemistry*; D006801:Humans; D051379:Mice; D008807:Mice, Inbred BALB C; D054457:Tissue Scaffolds / Q000737:chemistry*
chemical_list: D005780:Gelatin; D006493:Heparin
keywords: Basic fibroblast growth factor; Cross linking; Gelatin; Heparin