The effect of thymosin beta4 on articular cartilage chondrocyte matrix metalloproteinase expression

Blain EJ, Mason DJ, Duance VC · Biochemical Society Transactions

Thymosin β4 increased expression and activation of pro-MMP-9, a matrix-degrading enzyme — a cautionary signal that in cartilage the peptide may be catabolic rather than regenerative.

Population

Primary articular cartilage chondrocytes

Intervention

Thymosin β4 2–4 µg/mL in culture

Comparator

Untreated cultures

Limitations

Short-exposure culture study; but it is the most direct cartilage-specific TB4 datum available and it points the wrong way.