title: Tissue engineered cartilage from hTGF beta2 transduced human adipose derived stem cells seeded in PLGA/alginate compound in vitro and in vivo.
abstract: Chondrogenic potential of human adipose derived stem cells (hASCs) makes them a possible source of seeding cells for cartilage tissue engineering. We aim to examine the chondrogenic differentiation of human transforming growth factor beta2 (hTGF beta2) transduced hASCs seeded in three-dimensional scaffold in vitro and in vivo. In this study, hASCs were isolated from human subcutaneous adipose tissue and transduced with a replication deficient adenovirus carrying hTGF beta2 (Ad5-hTGF beta2), and then the transduced cells were seeded and cultured in PLGA/alginate compounds. RT-PCR analysis revealed that Ad5-hTGF beta2 transduced hASCs produced aggrecan and collagen type II after 7-day induction in vitro and continued throughout the culture period; this was also demonstrated by the positive staining of Alcian blue and immunohistochemistry for collagen type II. For in vivo study, Ad5-hTGF beta2 transduced hASCs seeded in PLGA/alginate compounds were implanted in subcutaneous pockets of nude mice; after 12 weeks, the implants were harvested and examined by haematoxylin and eosin staining, AB-PAS staining, and immunohistochemical analysis, and the results demonstrated the formation of cartilage tissue. As a control, all these were not observed in the constructs with Ad5-EGFP transduced hASCs. In conclusion, our study demonstrates that adenovirus-mediated hTGF beta2 gene transfer is able to induce the hASCs into chondrogenic lineage both in vitro and in vivo. Ad5-hTGF beta2 transduced hASCs combined with three-dimensional PLGA/alginate compound may be a viable method in treating injuries of cartilage.
authors: Orthopaedics Department, Peking University Third Hospital, Beijing, People's Republic of China.
authors: Xiao Bing
authors: XB
authors: Jin
authors: Yong Sheng
authors: YS
authors: Sun
authors: Ke
authors: K
authors: Zhang
authors: Jing
authors: J
authors: Wang
authors: Tai Ping
authors: TP
authors: Shi
authors: Xiao Dong
authors: XD
authors: Ju
authors: Si Quan
authors: SQ
authors: Lou
mesh_terms: D000256:Adenoviridae; D000273:Adipose Tissue / Q000166:cytology; D000368:Aged; D000464:Alginates / Q000494:pharmacology*; D000818:Animals; D002356:Cartilage / Q000187:drug effects / Q000378:metabolism*; D020219:Chondrogenesis / Q000187:drug effects / Q000235:genetics; D020723:Glucuronic Acid / Q000494:pharmacology; D006603:Hexuronic Acids / Q000494:pharmacology; D006801:Humans; D007150:Immunohistochemistry; D019344:Lactic Acid / Q000494:pharmacology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D008875:Middle Aged; D011100:Polyglycolic Acid / Q000494:pharmacology*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013234:Stem Cells / Q000166:cytology / Q000187:drug effects / Q000378:metabolism* / Q000648:ultrastructure; D023822:Tissue Engineering; D014161:Transduction, Genetic; D053781:Transforming Growth Factor beta2 / Q000378:metabolism*; D019076:Transgenes
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D053781:Transforming Growth Factor beta2; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D020723:Glucuronic Acid