What Is Thymosin Beta-4 (TB-500)?
Thymosin Beta-4 (Tβ4) is a naturally occurring 43-amino-acid actin-sequestering protein ubiquitously expressed in virtually all mammalian cells. It was first identified in thymic tissue but has since been found throughout the body, with especially high concentrations in platelets and wound fluids. TB-500 is a synthetic analogue corresponding to the conserved actin-binding domain fragment LKKTETQ (residues 17–23 of the full 43-AA sequence, MW ≈4,963 Da as the full analogue) that retains the primary biological activities documented for full-length Thymosin Beta-4 in preclinical research.
EdgeChems stocks TB-500 (Thymosin Beta-4 analogue) 5mg vials at ≥99% HPLC purity with batch Certificate of Analysis.
Mechanism of Action
1. Actin Dynamics and G-Actin Sequestration
Thymosin Beta-4 is quantitatively the most abundant G-actin sequestering peptide in mammalian cells. By binding G-actin monomers, Tβ4 regulates the free pool of actin available for polymerisation into F-actin filaments, thereby controlling cell migration, morphology, and cytoskeletal dynamics. This mechanism underpins Tβ4’s effects on wound healing, as cell migration is rate-limiting in tissue repair.
2. Angiogenesis
Multiple in-vivo wound-healing models have shown that exogenous Tβ4/TB-500 promotes blood vessel formation (angiogenesis) in injured tissue, accelerating vascular regrowth as part of the tissue repair cascade. The mechanism involves up-regulation of VEGF and activation of endothelial cell migration pathways dependent on actin dynamics.
3. Anti-inflammatory Signalling
Tβ4 down-regulates NF-κB-dependent inflammatory pathways and reduces neutrophil infiltration at wound sites in rodent models. This anti-inflammatory component helps explain the accelerated wound closure and reduced scarring observed in treated animal subjects.
4. Stem Cell Activation
Cardiac and neuronal injury models show Tβ4-stimulated migration of progenitor cells to injury sites, implicating Tβ4 in stem cell recruitment as part of regenerative responses.
TB-500 vs Full-Length Thymosin Beta-4
Researchers searching for thymosin beta 4 for sale, buy thymosin beta-4, or thymosin beta 4 tb 500 should understand the relationship between these names:
- Thymosin Beta-4 — the full 43-amino-acid endogenous protein (not readily available as a synthetic research compound due to complexity)
- TB-500 — the synthetic LKKTETQ fragment (residues 17–23) that reproduces the primary research activities of full-length Tβ4 and is the form used in published preclinical protocols
TB-500 and Thymosin Beta-4 are used interchangeably in research context: when researchers write buy thymosin beta-4 or thymosin beta 4 for sale, they are typically seeking the TB-500 synthetic fragment available at EdgeChems.
Research Applications
- Wound healing — Dermal and subcutaneous wound models; full-thickness excision assays in rodents showing accelerated re-epithelialisation and increased tensile strength
- Tendon and ligament repair — Rotator cuff, ACL, and tendon-to-bone attachment repair models in equine and rodent subjects
- Cardiac repair — Myocardial infarction models examining cardiomyocyte survival and angiogenesis
- Neurological injury — Stroke and TBI models showing neuronal migration promotion and axonal outgrowth
- Ocular healing — Corneal wound healing models (Tβ4 is present at high levels in tears)
TB-500 + BPC-157 Research Stack
The most frequently studied tissue repair combination pairs TB-500 with BPC-157 (Body Protection Compound 157). The two peptides act via complementary mechanisms — BPC-157 through VEGF-independent angiogenesis and GI protection, TB-500 through actin dynamics and G-actin sequestration — making their combination a standard in pre-clinical repair protocols. EdgeChems offers the pre-blended BPC-157 + TB-500 blend (5mg/5mg vial) for convenience. A triple blend ARA-290 + BPC-157 + TB-500 is also available.
Specification
| Parameter | Value |
|---|---|
| Common name | TB-500 / Thymosin Beta-4 analogue |
| Core fragment | LKKTETQ (residues 17–23 of Tβ4) |
| Format | Lyophilised vial (white powder) |
| Vial size | 5mg |
| Purity | ≥99% by HPLC |
| Reconstitution | Sterile or bacteriostatic water |
| Storage | −20°C (lyophilised); 4°C up to 7 days (reconstituted) |
| CoA | Batch HPLC CoA available |
Where to Buy Thymosin Beta-4 (TB-500)
- TB-500 (Thymosin Beta-4) 5mg vial: buy Thymosin Beta-4 for sale — EdgeChems
- BPC-157 + TB-500 blend (5mg/5mg): buy BPC-157 + TB-500 blend — EdgeChems
- Recovery & Repair catalog: edgechems.com — Recovery & Repair
For laboratory and research use only. Not for human or veterinary consumption. EdgeChems supplies this compound exclusively for licensed preclinical research applications.