title: A comparative analysis of cartilage engineered from different perinatal mesenchymal progenitor cells.
abstract: We sought to compare engineered cartilaginous constructs derived from different perinatal mesenchymal progenitor cell (MPC) sources. Ovine MPCs isolated from amniotic fluid (AF, n = 8), neonatal bone marrow (BM, n = 6), and preterm umbilical cord blood (CB, n = 12) were expanded and comparably seeded onto synthetic scaffolds. Constructs were maintained in chondrogenic media containing transforming growth factor-beta. After 12-15 weeks, specimens were compared with native fetal hyaline and elastic cartilage by gross inspection, histology, immunohistochemistry, and quantitative extracellular matrix (ECM) assays. MPCs from AF proliferated significantly faster ex vivo when compared to MPCs from the other sources. Chondrogenic differentiation was evident in all groups, as shown by toluidine blue staining and expression of aggrecan, cartilage proteoglycan link protein, and collagen type II. Quantitatively, all engineered specimens had significantly lower levels of glycosaminoglycans than native hyaline cartilage. Elastin levels in AF-based constructs (156.0 +/- 120.4 microg/mg) were comparable to that of native elastic cartilage (235.8 +/- 54.2 microg/mg), both of which were significantly higher than in BM- and CB-based specimens. We conclude that the ECM profile of cartilage engineered from perinatal MPCs is highly dependent on cell source. ECM peculiarities should be considered when designing the optimal cartilaginous bioprosthesis for use in perinatal surgical reconstruction.
authors.affiliation: Department of Surgery, Children's Hospital Boston & Harvard Medical School, Boston, Massachusetts 02115, USA.
authors.forename: Shaun M
authors.initials: SM
authors.lastname: Kunisaki
authors.forename: Julie R
authors.initials: JR
authors.lastname: Fuchs
authors.forename: Shaun A
authors.initials: SA
authors.lastname: Steigman
authors.forename: Dario O
authors.initials: DO
authors.lastname: Fauza
mesh_terms: D053674:Aggrecans / Q000378:metabolism; D000653:Amniotic Fluid / Q000166:cytology*; D000818:Animals; D001854:Bone Marrow Cells / Q000166:cytology*; D002356:Cartilage / Q000737:chemistry / Q000166:cytology* / Q000502:physiology; D018929:Cell Culture Techniques / Q000379:methods; D002454:Cell Differentiation; D049109:Cell Proliferation; D024043:Collagen Type II / Q000378:metabolism; D003470:Culture Media / Q000737:chemistry / Q000494:pharmacology; D004247:DNA / Q000032:analysis; D004549:Elastin / Q000032:analysis; D005109:Extracellular Matrix / Q000737:chemistry; D005260:Female; D006025:Glycosaminoglycans / Q000032:analysis; D007150:Immunohistochemistry; D059630:Mesenchymal Stem Cells / Q000166:cytology*; D011247:Pregnancy; D011509:Proteoglycans / Q000378:metabolism; D012756:Sheep; D023822:Tissue Engineering / Q000379:methods*; D014048:Tolonium Chloride / Q000378:metabolism; D016212:Transforming Growth Factor beta / Q000494:pharmacology
chemical_list: D053674:Aggrecans; D024043:Collagen Type II; D003470:Culture Media; D006025:Glycosaminoglycans; D011509:Proteoglycans; D016212:Transforming Growth Factor beta; D014048:Tolonium Chloride; D004247:DNA; D004549:Elastin