About TB-500
TB-500 is a synthetic version of Thymosin Beta-4, a naturally occurring 43-amino acid peptide found in high concentrations in blood platelets, wound fluid, and other tissues. Thymosin Beta-4 was originally isolated from thymus extracts in the 1960s and has since been identified as a major actin-sequestering protein with significant roles in cell migration, differentiation, and cellular pathway. TB-500 represents a truncated, active region of the full Thymosin Beta-4 molecule, making it more practical for research applications while retaining the key biological activity associated with the parent molecule.
Mechanism of Action
TB-500's biological effects stem from several well-characterized mechanisms that have been studied extensively in laboratory and preclinical settings:
Actin Sequestration: TB-500's primary function involves binding to G-actin (monomeric actin), preventing its polymerization into F-actin filaments. This regulation of actin dynamics is crucial for cell motility and morphological changes during cellular pathway.
Cell Migration Promotion: By modulating the actin cytoskeleton, TB-500 promotes cell migration—a critical process in wound-model research, angiogenesis, and cellular-pathway research. Research shows enhanced migration of endothelial cells, keratinocytes, and other cell types.
Angiogenesis Stimulation: Studies demonstrate TB-500's ability to promote new blood vessel formation. This involves upregulation of VEGF and other angiogenic factors, along with direct effects on endothelial cell proliferation and migration.
Inflammatory Pathway Research: Research indicates TB-500 may modulate cytokine expression and inflammatory cell activity in laboratory studies. Studies show altered expression of inflammatory markers in various experimental models.
Stem Cell Recruitment: Some research suggests TB-500 may influence the mobilization and differentiation of stem and progenitor cells, potentially contributing to its observed cellular-pathway effects.
Research Highlights
Cardiac Research
TB-500/Thymosin Beta-4 has been extensively studied in cardiac research. Studies in animal models of myocardial infarction have shown reduced scar formation, improved cardiac function, and enhanced survival of cardiomyocytes. Clinical trials have explored its potential in cardiac cellular-pathway research following heart attack.
Corneal Healing Studies
Significant research has focused on TB-500's effects on corneal healing. Studies demonstrate accelerated corneal wound closure, reduced inflammation, and improved outcomes in various corneal injury models. This research led to clinical development of Thymosin Beta-4-based eye drops.
Dermal Cellular Research
Research has examined TB-500's effects on skin wounds, including burns, incisions, and chronic wounds. Studies report accelerated wound closure, enhanced epithelialization, improved collagen organization, and reduced scarring in various experimental models.
Musculoskeletal Research
Preclinical studies have investigated TB-500's effects on muscle, tendon, and ligament injuries. Research shows potential benefits for muscle strain recovery, tendon healing, and joint health, with observations of reduced inflammation and accelerated cellular pathway.
Product Specifications
Research Usage Guidelines
Reconstitution Protocol
1Allow vial to reach room temperature before reconstitution 2Use bacteriostatic water for multi-use applications 3Add solvent gently down the inside wall of the vial 4Allow to dissolve naturally or gently swirl—never shake 5Typical reconstitution: 2mL per 5mg vial yields 2.5mg/mL concentration
Storage Guidelines
•Lyophilized TB-500 (normal): Refrigerate at 2–8°C •Lyophilized TB-500 (long-term, until expiry): Store at −20°C for optimal stability •Reconstituted: Refrigerate at 2–8°C, stable for 2–3 weeks •Protect from light exposure •Avoid multiple freeze-thaw cycles—aliquot for long-term storage
Frequently Asked Questions
Research References
[1] Goldstein AL, et al. Thymosin beta4: a multi-functional structural peptide. Expert Opin Biol Ther. 2012;12(suppl 1):S37-S51. [2] Sosne G, et al. Thymosin beta 4 promotes corneal wound-model research and decreases inflammation in vivo following alkali injury. Exp Eye Res. 2002;74(2):293-299. [3] Bock-Marquette I, et al. Thymosin beta4 activates integrin-linked kinase and promotes cardiac cell migration, survival and cardiac repair. Nature. 2004;432(7016):466-472. [4] Hinkel R, et al. Thymosin beta4: a key factor for protective effects of eEPCs in acute and chronic ischemia. Ann N Y Acad Sci. 2010;1194:105-111.
Learn More
Explore our comprehensive research guides for detailed information on peptide handling, storage, and research protocols.