What Is TB-500? A Quick Research Overview
Written by NorthPeptide Research Team | Reviewed March 21, 2026
TB-500 is a synthetic peptide fragment of thymosin beta-4, a naturally occurring 43-amino-acid protein found in nearly all human and animal cells. It is one of the most studied peptides in tissue repair and regeneration research, particularly for its role in promoting cell migration and blood vessel formation.
What Is TB-500 and How Does It Work?
Thymosin beta-4 (Tβ4) is a member of the beta-thymosin family, originally isolated from the thymus gland. It is the primary intracellular G-actin sequestering protein — meaning it regulates actin, one of the most abundant proteins in human cells and a critical component of cell structure and movement.
TB-500 represents the active region of Tβ4, specifically the amino acid sequence responsible for actin binding, cell migration, and wound healing activity. By promoting G-actin polymerization into F-actin, TB-500 enables cells to move, proliferate, and form new tissues — processes fundamental to wound healing and tissue remodeling.
Research has identified several pathways through which TB-500 exerts its effects: upregulation of cell surface integrins, promotion of angiogenesis (new blood vessel formation), and reduction of inflammatory cytokines (PMID: 20100610).
Explore NorthPeptide's research-grade TB-500 — verified ≥98% purity with full COA documentation. View product details and COA →
Key Research Highlights
Wound Healing: Tβ4/TB-500 has been shown to accelerate wound closure in dermal wound models. A landmark study demonstrated that topical application of Tβ4 promoted dermal wound repair through enhanced angiogenesis and keratinocyte migration (PMID: 20100610).
Cardiac Research: Research in cardiac injury models showed Tβ4 activated epicardial progenitor cells and promoted neovascularization following myocardial infarction, suggesting a role in cardiac tissue repair (PMID: 22513374).
Anti-inflammatory Effects: TB-500 research has shown downregulation of inflammatory cytokines in multiple tissue models, contributing to reduced inflammation in injury zones.
Hair Growth: In animal models, Tβ4 stimulated hair follicle stem cells and promoted hair growth, suggesting effects on stem cell differentiation.
Corneal Healing: Tβ4 has advanced the furthest clinically in ophthalmology, with studies on corneal wound healing showing promising results.
Quick Reference
| Property | Detail |
|---|---|
| Full Name | Thymosin Beta-4 Fragment (TB-500) |
| Parent Protein | Thymosin beta-4 (43 amino acids) |
| Molecular Weight | ~4963 Da (Tβ4) |
| Primary Mechanism | Actin sequestration, cell migration |
| Research Areas | Wound healing, cardiac repair, anti-inflammation |
| Key Pathway | G-actin → F-actin polymerization |
| Storage | Lyophilized: -20°C | Reconstituted: 2-8°C |
| Purity Standard | ≥98% by HPLC |
Further Reading
For a comprehensive analysis including full mechanism breakdowns and complete reference tables, see our Full TB-500 Research Guide →
Also relevant: BPC-157 vs TB-500 Comparison | Wound Healing Peptides Overview
Written by NorthPeptide Research Team
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Disclaimer: This article is for informational and educational purposes only. All peptides mentioned are intended for laboratory and research use only. Not for human consumption. NorthPeptide products are research chemicals and are not approved for medical use. Always consult applicable laws and regulations in your jurisdiction.