Abstract
The pro-inflammatory environment of the degenerated IVD represents a challenge for regenerative therapies. The study demonstrates that hyaluronan acts as an anti-inflammatory molecule by down-regulating IFNAR1 and IFNAR2, the signaling molecules STAT1, STAT2, JAK1 and the downstream apoptotic targets IGFBP3 and IFIT3. We also demonstrated that hyaluronan modulates the disc matrix environment by increasing aggrecan and collagen I synthesis and down-regulating ADAMTS4 that degrades the matrix under inflammatory conditions. The significance of this work lies in the fact that hyaluronan acts as an anti-inflammatory molecule by shifting the disc environment towards a more anabolic state and by promoting native IVD matrix production.
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