TB-500 (Thymosin Beta-4)

Thymosin beta-4 (TB4) is a naturally occurring, 43-amino acid regenerative peptide found in high concentrations in various human tissues and body fluids, particularly in platelets and white blood cells. Its primary intracellular function is to sequester G-actin monomers, thereby regulating actin polymerization and the structural dynamics of the cell’s cytoskeleton, which is crucial for cell movement, division, and differentiation. When released outside the cell, TB4 acts as a potent signaling molecule (a “moonlighting” protein), promoting tissue repair and regeneration through diverse mechanisms, including stimulating cell migration and angiogenesis (new blood vessel formation), reducing inflammation and apoptosis (programmed cell death), and activating adult stem/progenitor cells. These multi-functional properties provide the scientific basis for its ongoing investigation in clinical trials for treating injuries to the skin, eye, and heart