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RESEARCH NOTE · 06

TB-500: understanding the thymosin beta-4 fragment

What the research literature says about thymosin beta-4 and the separate compound commonly called TB-500.

JOURNAL TYPEResearch NoteSUBJECTTB-500
01
“TB-500” is commonly used to refer to the peps fragment LKKTETQ associated with thymosin beta-4 research. It is important not to treat the terms thymosin beta-4 and TB-500 as automatically interchangeable: they are related but chemically distinct research materials.

RESEARCH SNAPSHOT

Research-associated effects

Areas of effect or outcome that researchers have investigated or reported in the literature. These are research associations, not guarantees of a particular result.

RESEARCH AREACell migration
RESEARCH AREATissue-repair processes in experimental models
RESEARCH AREAAngiogenic and vascular signaling
RESEARCH AREAInflammatory-response and wound-healing research

Evidence varies by compound, model, formulation, route, endpoint, and study design. Component-level findings do not automatically establish the same effect for a blend.

02

RESEARCH NOTE

What researchers study

Thymosin beta-4 has been investigated in laboratory and clinical research involving cell migration, tissue repair, angiogenesis, and other biological processes. Human studies have also examined recombinant or synthetic thymosin beta-4 formulations for pharmacokinetics and safety.

For example, a first-in-human study of recombinant human thymosin beta-4 evaluated single and repeated intravenous doses in healthy volunteers and reported pharmacokinetic and tolerability findings.

03

RESEARCH NOTE

TB-500 is not an established therapy

The existence of human research on thymosin beta-4 does not establish the safety or effectiveness of TB-500 for a particular human use. FDA has specifically identified the thymosin beta-4 fragment (LKKTETQ), also known as TB-500, as having important gaps in human exposure and safety information.

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Source: PubMed; U.S. FDA.