title: Delivery of a Cell Patch of Cocultured Endothelial Cells and Smooth Muscle Cells Using Thermoresponsive Hydrogels for Enhanced Angiogenesis.
abstract: Cell-based therapy has been studied as an attractive strategy for therapeutic angiogenesis. However, obtaining a stable vascular structure remains a challenge due to the poor interaction of transplanted cells with native tissue and the difficulty in selecting the optimal cell source. In this study, we developed a cell patch of cocultured human umbilical vein endothelial cells (HUVECs) and smooth muscle cells (SMCs) using thermosensitive hydrogels for regeneration of mature vasculatures. In vitro characterization of HUVECs in the cocultured group revealed the formation of a mesh-like morphology over 5 days of culture. Vascular endothelial growth factor expression was also upregulated in the cocultured group compared with HUVECs only. The cell patch seeded with HUVECs, SMCs, or both cell type was prepared on the synthetic thermosensitive and cell interactive hydrogels, and readily detached from the hydrogel within 10 min by expansion of the hydrogel when the temperature was decreased to 4°C. We then investigated the therapeutic effect of the cell patch using a hind limb ischemic model of an athymic mouse. Overall, the group that received a cell patch of cocultured HUVECs and SMCs had a significantly retarded rate of necrosis with a significant increase in the number of arterioles and capillaries for 4 weeks compared with the groups transplanted with only HUVECs or SMCs. Dual staining of smooth muscle alpha actin and human nuclear antigen showed that the implanted cell patch was partially involved in vessel formation. In summary, the simple transplantation of a cocultured cell patch using a hydrogel system could enhance therapeutic angiogenesis through the regeneration of matured vascular structures.
authors.affiliation: 1 Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University , Seoul, Republic of Korea.|2 BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team , Seoul, Republic of Korea.
authors.forename: Seongwoo
authors.initials: S
authors.lastname: Bak
authors.affiliation: 1 Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University , Seoul, Republic of Korea.|2 BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team , Seoul, Republic of Korea.
authors.forename: Taufiq
authors.initials: T
authors.lastname: Ahmad
authors.affiliation: 1 Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University , Seoul, Republic of Korea.|2 BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team , Seoul, Republic of Korea.
authors.forename: Yu Bin
authors.initials: YB
authors.lastname: Lee
authors.affiliation: 1 Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University , Seoul, Republic of Korea.|2 BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team , Seoul, Republic of Korea.
authors.forename: Joong-yup
authors.initials: JY
authors.lastname: Lee
authors.affiliation: 1 Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University , Seoul, Republic of Korea.|2 BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team , Seoul, Republic of Korea.
authors.forename: Eun Mi
authors.initials: EM
authors.lastname: Kim
authors.affiliation: 1 Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University , Seoul, Republic of Korea.|2 BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team , Seoul, Republic of Korea.
authors.forename: Heungsoo
authors.initials: H
authors.lastname: Shin
mesh_terms: D000818:Animals; D018920:Coculture Techniques; D005260:Female; D064593:Heterografts; D061307:Human Umbilical Vein Endothelial Cells / Q000378:metabolism / Q000637:transplantation; D006801:Humans; D020100:Hydrogels / Q000737:chemistry*; D051379:Mice; D008819:Mice, Nude; D032389:Myocytes, Smooth Muscle / Q000378:metabolism / Q000637:transplantation; D018919:Neovascularization, Physiologic
chemical_list: D020100:Hydrogels