NF-kB is a control protein inside cells that switches on inflammation-related genes when it moves into the nucleus. MMP13 is one of the genes it helps switch on.
Also called NF-κB, nuclear factor kappa B.
When a cell receives an inflammatory signal such as IL-1, NF-kB is released from its inhibitor and moves into the nucleus, where it switches on target genes. In cartilage cells, IL-1 needed NF-kB, along with p38 and JNK, to switch on MMP13 (Mengshol 2000). In rat cartilage cells, MMP13 and type II collagen were both described as NF-kB targets (Wang 2017).
Blocking NF-kB stopped fibronectin fragments raising MMP13 in human cartilage cells, and older cells made more of the NF-kB-controlled messenger IL-1 beta (Forsyth 2005).
Several compounds studied against MMP13 act on this switch. Curcumin blocked NF-kB activation in rat cartilage cells (Wang 2017). AKBA damped the HMGB1, TLR4 and NF-kB route in rats (Abo-Zalam 2025). A curcumin metabolite blocked MMP13 without affecting NF-kB-driven genes, showing there is more than one way in (Roy 2025).
Yes, in lab studies. The inflammatory messenger IL-1 raised MMP13 in human cartilage and cartilage cells in several studies, and TNF-alpha did too. To switch the MMP13...
Not on its own. In healthy ankle cartilage from 30 donors aged 16 to 75, all four collagen-cutting enzymes were present but did not change with age. What age changed was...
In lab and animal studies, yes. Curcumin lowered MMP13 in rat cartilage cells exposed to IL-1 beta, and a curcumin metabolite bound and blocked MMP13 directly and...