Research Paper Volume 16, Issue 1 pp 685—700
ZIP4 upregulation aggravates nucleus pulposus cell degradation by promoting inflammation and oxidative stress by mediating the HDAC4-FoxO3a axis
Figure 4. ZIP4 upregulation aggravates ECM degradation in NP cells undergoing IL-1β treatment. NP cells transfected with the vector and ZIP4 overexpression plasmids were subjected to IL-1β (20 ng/ml) treatment for a 24-hour period. (A) The cytotoxicity detection kit evaluated LDH release in NP cells following IL-1β treatment. (B, C) TNF-α and IL-6 profiles in the cells verified by ELISA. (D) Western blot showing the expression levels of COX2 and iNOS in the cells. (E–G) MDA, SOD, and ROS levels in the cells. Scale bar=100 μm. (H) MMP-3, MMP-13, collagen II and aggrecan levels in the cells confirmed by western blot. N=3. **P<0.01, ***P<0.001 (vs. CON); +P<0.05, ++P<0.01 (vs. vector+IL-1β).