Tissue Repair · Research Compound
TB-500
A synthetic fragment of Thymosin Beta-4 studied in preclinical models of cell migration and tissue regeneration.
TB-500 is a synthetic peptide based on an active region of Thymosin Beta-4 (Tβ4), a naturally occurring protein involved in actin regulation and cell migration. In the research community it is one of the most referenced tissue-repair peptides, frequently studied together with BPC-157 in tissue-repair research.
Research interest centers on Tβ4’s documented roles in actin sequestration, cell migration, and angiogenesis. As with most peptides in this category, the evidence is preclinical — cell-culture and animal models — and TB-500 itself is not an approved drug for human use.
Research areas
Cell Migration & Actin
Tβ4's best-characterized function is binding G-actin; research examines how this influences cell migration during tissue repair.
Cardiac & Fibrosis Research
Recent publications explore the parent protein's role in cardiac tissue models and reduction of fibrosis.
Wound Healing
Studied for promotion of cell migration and new blood-vessel formation in wound-model research.
Anti-Inflammatory Signaling
Investigated for modulation of inflammatory pathways in preclinical injury models.
Recent research findings
- 2024Research continued on the Ac-SDKP fragment of Tβ4 and its vascular and anti-fibrotic signaling.
- 2023Reviews summarized Tβ4's cardiac-regeneration and corneal-healing model data.
- 2022Interest grew in traumatic brain injury models exploring Tβ4-related neurorestorative effects.
Published Research & Citations
The research summarized above is drawn from published, peer-reviewed studies. Explore the 6 sources below — links open the abstract or, where marked, the full free article on the U.S. National Library of Medicine (PubMed / PMC).
- Xing Y, et al. Progress on the Function and Application of Thymosin β4. Frontiers in Endocrinology, 2021. Free full text Open-access review of Tβ4's roles in actin regulation, angiogenesis, wound repair, and tissue regeneration.
- Goldstein AL, et al. Thymosin beta4: actin-sequestering protein moonlights to repair injured tissues. Trends in Molecular Medicine, 2005. Foundational review establishing Tβ4 as the major actin-sequestering molecule with tissue-repair roles.
- Malinda KM, et al. Thymosin beta4 accelerates wound healing. Journal of Investigative Dermatology, 1999. Rat full-thickness wound model; 42-61% faster re-epithelialization vs. controls.
- Bock-Marquette I, et al. Thymosin beta4 activates integrin-linked kinase and promotes cardiac cell migration, survival and cardiac repair. Nature, 2004. Landmark study reporting Tβ4-driven cardiac cell survival and repair after injury in mice.
- Goldstein AL, et al. Thymosin β4: a multi-functional regenerative peptide. Basic properties and clinical applications. Expert Opinion on Biological Therapy, 2012. Review of Tβ4 mechanisms across dermal, corneal, and cardiac repair models.
- Sosne G, et al. Thymosin Beta 4: A Potential Novel Therapy for Neurotrophic Keratopathy, Dry Eye, and Ocular Surface Diseases. Vitamins and Hormones, 2016. Reviews Tβ4's anti-inflammatory and wound-healing activity in ocular-surface research.