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Research summary: TB-500 is a synthetic analogue of Thymosin Beta-4 (Tβ4), a naturally occurring 43-amino-acid protein abundant in blood platelets and wound fluid. TB-500 corresponds to the active region fragment (amino acids 17–23) that retains actin-binding properties. Its most-studied role in the research literature is as a primary G-actin sequestering molecule involved in cytoskeletal dynamics and cellular migration. Sold for laboratory research use only.
TB-500 is a synthetic analogue of Thymosin Beta-4 (Tβ4), a naturally occurring protein found in high concentrations in blood platelets and wound fluid. It is one of the most abundant proteins in mammalian cells and has accumulated a substantial research literature examining its role in actin regulation and cellular migration.
The Science Behind Thymosin Beta-4
Thymosin Beta-4 is a 43-amino acid protein first isolated in thymus tissue, now known to be produced in virtually all cell types. TB-500 specifically refers to the active region fragment of Tβ4 (amino acids 17-23) that retains actin-binding and cellular signaling properties.
Actin Regulation Research
One of the most studied properties of Tβ4 is its role as a primary G-actin (monomeric actin) sequestering molecule. Research has examined how this function relates to cytoskeletal dynamics and cellular motility — processes fundamental to tissue response following injury.
Wound Tissue Studies
Research in animal models has examined Tβ4’s effects following tissue injury. Studies published in the Annals of the New York Academy of Sciences have observed effects on keratinocyte migration in skin wound models and endothelial cell activity in vascular biology studies.
Cardiac Research
Research led by Dr. Deepak Srivastava and published in Nature Medicine has examined Tβ4’s role in cardiac progenitor cell activation in mouse models — representing a notable direction in regenerative biology research.