| [Zn2+]i | intracellular free zinc |
| HIF-1α | hypoxia-induced factor 1α |
| TRPA1 | transient receptor potential ankyrin 1 |
| FLSs | human fibroblast-like synoviocytes |
| TNF-α | tumor necrosis factor-α |
| IL-1α | interleukin-1α |
| NF-κB | nuclear factor-κB |
| [Zn2+]e | extracellular free Zn2+ |
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