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SAGE Publications, Cartilage, 2_suppl(13), p. 920S-924S, 2020

DOI: 10.1177/1947603520908658

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The Viability and Anti-Inflammatory Effects of Hyaluronic Acid-Chitlac-Tracimolone Acetonide-β-Cyclodextrin Complex on Human Chondrocytes

This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Objective To compare the effects of the complex triamcinolone acetonide-hydroxypropyl-β-cyclodextrin (TA-CD) on in vitro inflamed primary human articular chondrocytes in the presence or absence of the mixture hyaluronic acid-Chitlac, a lactose-modified chitosan (HA-CTL). Design Changes in cell viability and pro-inflammatory cytokines gene expression were analyzed in human chondrocytes using an in vitro model of macrophage-mediated inflammation. Human monocytes U937 were differentiated to macrophages by phorbol 12-myristate 13-acetate (PMA) and lipopolysaccharides (LPS). The anti-inflammatory effects of the complex TA-CD and HA-CTL mixture were assessed on chondrocytes exposed for 24 hours to U937 conditioned medium (CM), by quantitative polymerase chain reaction analysis. Results The TA-CD viability was enhanced by the presence of the HA-CTL mixture in chondrocyte cultures. The exposure of cells to CM significantly increased interleukin-1β and interleukin-6 gene expression, and when the complex TA-CD was added to the inflamed cells, gene transcription of cytokines was restored to near baseline values, both in the presence or in the absence of HA-CTL mixture. Conclusion The addition of HA-CTL mixture significantly attenuated cytotoxicity induced by TA and preserved the anti-inflammatory effects, thus confirming the chondroprotective role of the HA-CTL mixture.