title: In vitro ovine articular chondrocyte proliferation: experiments and modelling.
abstract: This study focuses on analysis of in vitro cultures of chondrocytes from ovine articular cartilage. Isolated cells were seeded in Petri dishes, then expanded to confluence and phenotypically characterized by flow cytometry. The sigmoidal temporal profile of total counts was obtained by classic haemocytometry and corresponding cell size distributions were measured electronically using a Coulter Counter. A mathematical model recently proposed (1) was adopted for quantitative interpretation of these experimental data. The model is based on a 1-D (that is, mass-structured), single-staged population balance approach capable of taking into account contact inhibition at confluence. The model's parameters were determined by fitting measured total cell counts and size distributions. Model reliability was verified by predicting cell proliferation counts and corresponding size distributions at culture times longer than those used when tuning the model's parameters. It was found that adoption of cell mass as the intrinsic characteristic of a growing chondrocyte population enables sigmoidal temporal profiles of total counts in the Petri dish, as well as cell size distributions at 'balanced growth', to be adequately predicted.
authors.affiliation: Dipartimento di Ingegneria Chimica e Materiali, Università degli Studi di Cagliari, Cagliari, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Mancuso
authors.forename: M I
authors.initials: MI
authors.lastname: Liuzzo
authors.forename: S
authors.initials: S
authors.lastname: Fadda
authors.forename: M
authors.initials: M
authors.lastname: Pisu
authors.forename: A
authors.initials: A
authors.lastname: Cincotti
authors.forename: M
authors.initials: M
authors.lastname: Arras
authors.forename: G
authors.initials: G
authors.lastname: La Nasa
authors.forename: A
authors.initials: A
authors.lastname: Concas
authors.forename: G
authors.initials: G
authors.lastname: Cao
mesh_terms: D000465:Algorithms; D000818:Animals; D002358:Cartilage, Articular / Q000166:cytology* / Q000502:physiology*; D002452:Cell Count; D018929:Cell Culture Techniques; D049109:Cell Proliferation; D002478:Cells, Cultured; D019902:Chondrocytes / Q000166:cytology* / Q000502:physiology*; D019044:Image Cytometry / Q000379:methods; D055641:Mathematical Concepts; D008962:Models, Theoretical; D034561:Sheep, Domestic
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