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BACKGROUND:Cartilage tissue engineering is a promising way to repair cartilage defects. Different materials have been applied in the preparation of cartilage hydrogels, but all with various disadvantages.OBJECTIVE:The aim of this study was to prepare cartilage hydrogel using type II collagen, chondroitin sulfate and hyaluronic acid, to explore their gelation effect and compressive strength, and to analyze the feasibility of their application in cartilage tissue engineering.METHODS:Type II collagen (Col II), hyaluronic acid (HA) and chondroitin sulfate (CS) were mixed in a certain proportion to prepare gel scaffolds; changes in chemical groups were detected by Fourier transform infrared. After the hydrogel was prepared, its compressive strength was measured. Umbilical cord stem cells were co-cultured with hydrogel scaffolds to observe its cytocompatibility and analyze whether stem cells had cellular activity during co-culture; histological staining was applied to observe the hydrogel loaded with stem cells.RESULTS:Cartilage hydrogels were successfully prepared with good compressive strength, and Fourier transform infrared analysis showed that Schiff base reaction occurred during the preparation process and tight chemical cross-linking was formed. The results of umbilical cord stem cell co-culture showed that the hydrogel had good cytocompatibility and the stem cells had good activity in the hydrogel.CONCLUSIONS:Cartilage hydrogels with stable structures were successfully prepared and had good compressive strength. Hydrogel scaffold could provide a suitable living environment for umbilical cord stem cells, so that they maintain normal cell morphology and activity, and has a good application potential in cartilage tissue engineering.
Bio-Medical Materials and Engineering – IOS Press
Published: Nov 2, 2022
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