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Tissue engineering of ureteral grafts by seeding urothelial differentiated hADSCs onto biodegradable ureteral scaffolds
Author(s) -
Shi JianGuo,
Fu WeiJun,
Wang XiaoXiong,
Xu YongDe,
Li Gang,
Hong BaoFa,
Wang Yan,
Du ZhiYan,
Zhang Xu
Publication year - 2012
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.34182
Subject(s) - tissue engineering , biocompatibility , urothelial cell , in vivo , in vitro , stem cell , polylactic acid , scaffold , cytokeratin , cell , biomedical engineering , materials science , microbiology and biotechnology , pathology , chemistry , biology , anatomy , urothelium , immunohistochemistry , medicine , biochemistry , urinary system , polymer , metallurgy , composite material
Abstract The study is aimed to evaluate the differentiation potential of human adipose‐derived stem cells (hADSCs) into urothelial lineage, and to assess possibility of constructing ureteral grafts using the differentiated hADSCs and a novel polylactic acid (PLA)/collagen scaffolds. HADSCs were indirectly cocultured with urothelial cells in a transwell coculture system for urothelial differentiation. After 14 days coculturing, differentiation was evaluated by detecting urothelial lineage markers (cytokeratin‐18 and uroplakin 2) in mRNA and protein level. Then the differentiated hADSCs were seeded onto PLA/collagen ureteral scaffolds and cultured in vitro for 1 week. The biocompatibility of the scaffolds was tested by scanning electron microscopy (SEM) and MTT analysis. At last, the cell/scafflod grafts were subcutaneously implanted into 4‐week‐old female athymic mice for 14 days. The results demonstrated that the hADSCs could be efficiently induced into urothelial lineage by indirect coculture. The differentiated cells seeded onto the PLA/collagen ureteral scaffolds survived up to 7 days and maintained proliferation in vitro , which indicated that the scaffolds displayed good biocompatibility. In vivo study showed that the differentiated cells in the grafts survived, formed multiple layers on the scaffolds and expressed urothelial lineage markers. In conclusion, hADSCs may serve as an alternative cell resource in cell‐based tissue engineering for ureteral reconstruction. These cells could be employed to construct a model of ureteral engineering grafts and be effectively applied in vivo , which could be a new strategy on ureteral replacement with applicable potential in clinical research. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 100A:2612–2622, 2012.