Effects of silymarin on p65 NF-κB, p38 MAPK and CYP450 in LPS-induced hoof dermal inflammatory cells of dairy cows.

Summary

# Editorial Summary Laminitis remains a significant cause of lameness and economic loss in dairy cattle, yet its underlying inflammatory mechanisms remain incompletely understood, particularly at the cellular level in hoof tissue. Researchers isolated primary hoof dermal cells from dairy cows, induced inflammation using lipopolysaccharide (LPS), and examined whether silymarin—a bioactive compound from milk thistle—could modulate key inflammatory pathways and cellular viability. Silymarin treatment demonstrated a protective effect on inflamed dermal cells, reducing pro-inflammatory cytokine release (IL-1β and TNF-α levels), suppressing phosphorylation of the transcription factor p65 NF-κB and the stress-response kinase p38 MAPK, and modulating expression of the drug-metabolising enzymes CYP3A4 and CYP1A1. These findings suggest that silymarin may have genuine anti-inflammatory utility in managing hoof inflammation through multiple molecular pathways, offering a potentially valuable herbal intervention to reduce reliance on conventional antimicrobial treatments in dairy cow foot health protocols. Further in vivo studies are warranted to determine whether oral or topical silymarin supplementation translates these cellular benefits into clinical improvements in laminitis prevention and treatment.

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Key Findings

• •Silymarin reduced inflammatory cytokine production (IL-1β and TNF-α) in LPS-stimulated hoof dermal cells
• •Silymarin inhibited p65 NF-κB and p38 MAPK phosphorylation, suppressing key inflammatory signaling pathways
• •Silymarin maintained dermal cell viability and modulated CYP3A4 and CYP1A1 expression in inflammatory conditions

Conditions Studied

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