title: Dynamic compression modulates chondrocyte proliferation and matrix biosynthesis in chitosan/gelatin scaffolds.
abstract: It is well-documented that dynamical compression stimulates biosynthesis of extracellular biomacromolecules in cartilage explant or in chondrocyte/hydrogel systems. The object of this study was to apply high-strain dynamic compression to cell-seeded elastic scaffolds for articular cartilage tissue engineering. Rabbit chondrocytes had been cultured in chitosan/gelatin scaffolds for 3 days before dynamic compression. The chondrocyte/scaffold constructs were subjected to short-term (3 or 9 h) or long-term (6 h/day for 3 weeks) cyclic compression with 40% strain and 0.1 Hz. The expression of type II collagen and aggrecan was upregulated after 3-h of compression when compared with the free-swelling samples. Furthermore, long-term culture under dynamic compression facilitated cellular proliferation and deposition of glycosaminoglycan. Our results suggest that high-strain dynamic compression combined with elastic scaffolds might benefit articular cartilage tissue engineering.
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan.
authors.forename: Peng-Yuan
authors.initials: PY
authors.lastname: Wang
authors.forename: Hsiang-Hong
authors.initials: HH
authors.lastname: Chow
authors.forename: Juin-Yih
authors.initials: JY
authors.lastname: Lai
authors.forename: Hsuan-Liang
authors.initials: HL
authors.lastname: Liu
authors.forename: Wei-Bor
authors.initials: WB
authors.lastname: Tsai
mesh_terms: D053674:Aggrecans / Q000235:genetics / Q000378:metabolism; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry / Q000378:metabolism; D018929:Cell Culture Techniques / Q000379:methods; D049109:Cell Proliferation; D002478:Cells, Cultured; D048271:Chitosan / Q000737:chemistry / Q000378:metabolism; D019902:Chondrocytes / Q000166:cytology / Q000502:physiology*; D024043:Collagen Type II / Q000235:genetics / Q000378:metabolism; D019245:Compressive Strength; D004548:Elasticity; D005109:Extracellular Matrix / Q000737:chemistry / Q000378:metabolism*; D005780:Gelatin / Q000737:chemistry / Q000378:metabolism; D005786:Gene Expression Regulation; D006025:Glycosaminoglycans / Q000378:metabolism; D008422:Materials Testing; D016062:Porosity; D011817:Rabbits; D013314:Stress, Mechanical; D023822:Tissue Engineering / Q000295:instrumentation / Q000379:methods*; D054457:Tissue Scaffolds
chemical_list: D053674:Aggrecans; D001672:Biocompatible Materials; D024043:Collagen Type II; D006025:Glycosaminoglycans; D005780:Gelatin; D048271:Chitosan