Life Sciences in Vivo X-ray Imaging for Osteoarthritis Drug Research
β-Hydroxyisovalerylshikonin inhibits IL-1β-induced chondrocyte inflammation via Nrf2 and retards osteoarthritis in mice
X-ray images of mice were capture on the XPERT 80 from KUBTEC to study β-Hydroxyisovalerylshikonin inhibition for IL-1β-induced chondrocyte inflammation via Nrf2
It is the fourth most disabling disease worldwide and is currently incurable. Inflammation and extracellular matrix(ECM) degradation are considered to be substantial reasons for accelerating the progression of OA. β-Hydroxyisoamylshikonin (β-HIVS) is a natural naphthoquinone compound with anti-inflammatory and antioxidant activity.However, the effect of β-HIVS on OA is still unclear. In this study, we found that β-HIVS can down-regulate the expression of NO, PEG2, IL-6, TNF-α, COX-2,and iNOS, suggesting its anti-inflammatory effects in chondrocytes; we also found that β-HIVS may down-regulate the expression of ADAMTS5 and MMP13 and up-regulate the expression of aggrecan and collagen II to inhibit the degradation of ECM. Mechanistically, β-HIVS inhibited the NFκB pathway by activating the Nrf2/HO-1 axis, thereby exerting its anti-inflammatory and inhibitory effects on ECM degradation. In vivo experiments also proved the therapeutic effects of β-HIVS on OA in mice, and Nrf2 is the target of β-HIVS.These findings indicate that β-HIVS may become a new drug for the treatment ofOA.
Ximiao Chen, Mingbao Gu, Jie Jin, Chenghao Ren, Zongyou Pan, Yaosen Wu, Naifeng Tian, Aimin Wu, Liaojun Sun, Weiyang Gao, Xiangyang Wang, Chaoyong Bei, Yifei Zhou, and Xiaolei Zhang