TB-500

Mechanism

TB-500 is a synthetic version of the active region (amino acids 17-23, Ac-SDKP related sequence) of thymosin beta-4, a 43-amino acid protein that is the primary intracellular G-actin sequestering peptide. By binding to and sequestering monomeric G-actin, TB-500 regulates actin polymerization, which is essential for cell migration, cytokinesis, and cytoskeletal organization. This actin regulation promotes the migration of endothelial cells, keratinocytes, and stem/progenitor cells to sites of injury. TB-500 also promotes angiogenesis by upregulating VEGF expression and stimulates the production of extracellular matrix proteins. Additionally, it possesses anti-inflammatory properties through downregulation of inflammatory cytokines.

What the literature has looked at

• Studies have investigated tissue repair mechanisms through cell migration promotion
• Research has examined cardiac repair signaling and cardiomyocyte survival after ischemic injury in research models
• Studies have explored corneal tissue repair signaling and anti-inflammatory effects
• Research has assessed hair follicle stem cell migration and hair regrowth signaling pathways

Research context, not a claim about what this compound does. Research Use Only — not for human or animal consumption. 21+.

Cited work

• Malinda KM, et al. Thymosin beta 4 accelerates wound healing. J Invest Dermatol. 1999;113(3):364-368.

  Research investigated thymosin beta-4-mediated tissue repair mechanisms in rats, observing enhanced keratinocyte migration, collagen deposition signaling, and angiogenesis at the application site.

• Smart N, et al. Thymosin beta 4 and angiogenesis: modes of action and therapeutic potential. Angiogenesis. 2007;10(4):229-241.

  Reviewed thymosin beta-4's pro-angiogenic mechanisms, demonstrating its role in endothelial cell migration, survival, and tubule formation, with particular relevance to cardiac repair signaling after ischemia in research models.

Properties

type

Peptide (synthetic thymosin beta-4 fragment)