Enhanced cartilage tissue engineering by sequential exposure of chondrocytes to FGF-2 during 2D expansion and BMP-2 during 3D cultivation.

作者: Ivan Martin , R. Suetterlin , W. Baschong , M. Heberer , G. Vunjak-Novakovic

DOI: 10.1002/JCB.1203

关键词: Transforming growth factor betaFibroblastBone morphogenetic protein 2ScaffoldChemistryFibroblast growth factorAnatomyGlycosaminoglycanChondrocyteImmunostainingCell biology

摘要: Bovine calf articular chondrocytes, either primary or expanded in monolayers (2D) with without 5 ng/ml fibroblast growth factor-2 (FGF-2), were cultured on three-dimensional (3D) biodegradable polyglycolic acid (PGA) scaffolds 10 bone morphogenetic protein-2 (BMP-2). Chondrocytes FGF-2 exhibited high intensity immunostaining for smooth muscle alpha-actin (SMA) and collagen type I induced shrinkage of the PGA scaffold, thus resembling contractile fibroblasts. presence 6 weeks yielded engineered cartilage 3.7-fold higher cell number, 4.2-fold wet weight, 2.8-fold weight glycosaminoglycan (GAG) fraction than chondrocytes FGF-2. BMP-2 similar cellularity size, 1.5-fold GAG fraction, more homogenous distribution corresponding BMP-2. The during 3D culture had no apparent effect those In summary, 2D expansion reduced chondrocyte expression fibroblastic molecules responsiveness to cultivation scaffolds.

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