Open AccessChondrobags: A high throughput alginate-fibronectin micromass platform for in vitro human cartilage formation
Author(s) -
Kimia Witte,
María C. de Andrés,
Julia Wells,
Matthew J. Dalby,
Manuel Salmerón-Sánchez,
Richard O.C. Oreffo
Publication year - 2020
Publication title -
biofabrication
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.328
H-Index - 80
eISSN - 1758-5090
pISSN - 1758-5082
DOI - 10.1088/1758-5090/abb653
Subject(s) - chondrogenesis , microbiology and biotechnology , fibronectin , extracellular matrix , cartilage , mesenchymal stem cell , chondrocyte , sox9 , tissue engineering , biomedical engineering , materials science , chemistry , biology , anatomy , medicine , biochemistry , gene expression , gene
The maintenance and expansion of the cells required for formation of tissue-engineered cartilage has, to date, proven difficult. This is, in part, due to the initial solid phase extracellular matrix demanded by the cells inhabiting this avascular tissue. Herein, we engineer an innovative alginate-fibronectin microfluidic-based carrier construct (termed a chondrobag) equipped with solid phase presentation of growth factors that support skeletal stem cell chondrogenic differentiation while preserving human articular chondrocyte phenotype. Results demonstrate biocompatibility, cell viability, proliferation and tissue-specific differentiation for chondrogenic markers SOX9, COL2A1 and ACAN . Modulation of chondrogenic cell hypertrophy, following culture within chondrobags loaded with TGF-β1, was confirmed by down-regulation of hypertrophic genes COL10A1 and MMP13 . MicroRNAs involved in the chondrogenesis process, including miR-140, miR-146b and miR-138 were observed. Results demonstrate the generation of a novel high-throughput, microfluidic-based, scalable carrier that supports human chondrogenesis with significant implications therein for cartilage repair-based therapies.