The Definitive Peptide Research Reference Guide — Compound Review

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TB-500 Research Overview

TB-500 research overview: Thymosin Beta-4 fragment mechanism, actin regulation, cell migration, and research protocols.

What Is TB-500?

TB-500 is the synthetic analogue of the active region of Thymosin Beta-4 (Tβ4) — specifically the actin-binding domain (amino acids 17–23: Ac-LKKTETQ). It promotes cell migration, angiogenesis, and anti-inflammatory signaling throughout the body.

Mechanism of Action

TB-500 binds G-actin monomers, sequestering them from polymerization. This modulates the actin cytoskeleton in ways that promote cell motility — the fundamental mechanism underlying wound healing, tissue repair, and stem cell migration.

Key Research Applications

Cardiac repair: TB-500 promoted cardiomyocyte survival and reduced infarct size in rodent MI models. Wound healing: accelerated re-epithelialization and reduced inflammation. Tendon/ligament repair: promoted fibroblast migration to injury sites.