Osteoarthritis (OA) is the most prevalent degenerative joint disorder that affects millions of patients worldwide. There is currently no effective and standardised treatment available, neither for repair nor for prevention of onset or progression of this disease. In this study, 40 Traditional Chinese Medicine (TCM) compounds were screened for potential anabolic and anti-inflammatory properties on human OA chondrocytes
After induction of inflammation in our in vitro model, pro-inflammatory and catabolic genes were upregulated, and extracellular matrix content was decreased. After two weeks of treatment with certain compounds (Vanilic acid, Epimedin C, Psoralidin, Protocatechuicaldehyde, 4-Hydroxybenzoicacid and 5-Hydroxymethylfurfural), extracellular matrix was restored compared with the negative control group. Immunohistochemistry and Safranin-O staining confirmed superior amounts of cartilaginous matrix in treated pellets.
The compounds also exhibited anti-catabolic and anti-inflammatory effects and prevented the upregulation of pro-inflammatory markers including metalloproteinases and cyclooxygenase 2. Pathway analysis by bioinformatics tools, analyzing the most potent compounds, showed that osteoarthritic and inflammatory pathways tended to be downregulated. In conclusion, Vanilic acid and Epimedin C showed promising anti-inflammatory and anabolic effects in our inflammatory model on human OA chondrocytes. A local drug delivery system for the bioactive compound is envisioned and their efficacy for cartilage repair will be tested.
Swiss-China Joint project (SNF) ARI funding: CHF 250'000, Period: 2015-2019
Cao H-J, Li C-R, Wang L-Y, Ziadlou R, Grad S, Zhang Y, Cheng Y, Lai Y-X, Yao X-S, Alini M, Qin L, Wang X-L. Effect and mechanism of psoralidin on promoting osteogenesis and inhibiting adipogenesis. Phytomedicine 152860, 2019.
Zhang S, Hu P, Liu T, Li Z, Huang Y, Liao J, Hamid MR, Wen L, Wang T, Mo C, Alini M, Grad S, Wang T, Chen D, Zhou G. Kartogenin hydrolysis product 4-aminobiphenyl distributes to cartilage and mediates cartilage regeneration. Theranostics. 21;9(24):7108-7121, 2019.
Ziadlou R, Barbero A, Stoddart MJ, Wirth M, Li Z, Martin I, Wang XL, Qin L, Alini M, Grad S. Regulation of Inflammatory Response in Human Osteoarthritic Chondrocytes by Novel Herbal Small Molecules. Int J Mol Sci. 20(22). pii: E5745, 2019.
Ziadlou R, Grad S, Stoddart M, Wang X, Qin L, Barbero A, Martin I, Alini M. Regulation of Inflammatory Response by Novel Herbal Small Molecules in Human Osteoarthritic Chondrocytes. TERMIS-EU 2019, Rhodes, GR
Martin I (Prof), University of Basel, CH
Wang X (PhD), Shenzhen University, PR China
Qin L (Prof), The Chinese University of Hong Kong, HK
Lai Y (PhD), Shenzhen University, PR China
Huang Y (PhD), Shanghai Institute for Biological Sciences, PR China