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Compounds / Thymosin Beta-4 (full)

Thymosin Beta-4 (full)

Full name
Thymosin Beta-4 (Tβ4, full 43-residue peptide)
Mechanism
Endogenous 43-amino-acid actin-sequestering peptide. Promotes cell migration, angiogenesis, anti-apoptosis, and modulates inflammation/fibrosis; studied in cardiac repair and corneal/dermal wound healing.
Half-life
~hours systemic
Administration
topical/ophthalmic (trials), subcutaneous (research), intravenous (trials)
Typical dosage*
low: trial-defined · typical: investigational (e.g. ophthalmic drops in trials) · high: trial-defined
Researched for
wound-healing and cardiac-repair research, dry-eye/corneal research (RGN-259 in trials)
Reported side effects
ophthalmic trials: generally well tolerated, systemic safety data limited
Interactions
theoretical caution with active malignancy (pro-angiogenic)
Commonly combined
research/clinical-trial use; distinct from grey-market 'TB-500'
Scheduling
🇦🇺 AUNot ARTG-registered; research; WADA prohibited (as TB-500/Tβ4)
🇺🇸 USInvestigational; WADA prohibited
🇬🇧 UKNot licensed; WADA prohibited
Regulatory status
WADA-prohibited. Investigational in formal trials (e.g. ophthalmic RGN-259); not an approved therapeutic.

*Doses are commonly-reported figures from public sources, not a recommendation. Educational only.

20studies
9faqs
tissue-repaircardiovascularresearch

Studies (20)

YearTitle / venueSource
2025Identification of glutamine as a potential therapeutic target in dry eye disease
Signal transduction and targeted therapy · preclinical
PMID 39837870
2025Recombinant human thymosin beta 4 improves ischemic cardiac dysfunction in mice and patients with acute ST-segment elevation myocardial infarction after reperfusion
Cardiovascular research · preclinical
PMID 41229390
2025Thymosin Beta-4 Modulates Cardiac Remodeling by Regulating ROCK1 Expression in Adult Mammals
International journal of molecular sciences · preclinical
PMID 40362372
2023Thymosin beta-4 participate in antibacterial immunity and wound healing in black tiger shrimp, Penaeus monodon
Fish & shellfish immunology · preclinical
PMID 37689229
2023Thymosin beta-4 denotes new directions towards developing prosperous anti-aging regenerative therapies
International immunopharmacology · preclinical
PMID 36709593
2021Thymosin beta-4 prenatal administration improves fetal development and halts side effects due to preterm delivery
European review for medical and pharmacological sciences · preclinical
PMID 33506933
2018Thymosin beta 4 and the eye: the journey from bench to bedside
Expert opinion on biological therapy · preclinical
PMID 30063853
2018Thymosin Beta-4 and Ciprofloxacin Adjunctive Therapy Improves Pseudomonas aeruginosa-Induced Keratitis
Cells · preclinical
PMID 30241380
2018Expression and localisation of thymosin beta-4 in the developing human early fetal heart
PloS one · preclinical
PMID 30412598
2016Cardioprotection by Thymosin Beta 4
Vitamins and hormones · preclinical
PMID 27450736
2016Thymosin Beta 4: A Potential Novel Therapy for Neurotrophic Keratopathy, Dry Eye, and Ocular Surface Diseases
Vitamins and hormones · preclinical
PMID 27450739
2016Thymosin β4 Promotes Dermal Healing
Vitamins and hormones · preclinical
PMID 27450738
2014Thymosin β 4 gene silencing decreases stemness and invasiveness in glioblastoma
Brain : a journal of neurology · preclinical
PMID 24355709
2012Thymosin β4: a multi-functional regenerative peptide. Basic properties and clinical applications
Expert opinion on biological therapy · preclinical
PMID 22074294
2012Thymosin beta 4 is dispensable for murine cardiac development and function
Circulation research · preclinical
PMID 22158707
2007beta-Thymosins
Annals of the New York Academy of Sciences · preclinical
PMID 17468232
2007Thymosin beta-4 and the eye: I can see clearly now the pain is gone
Annals of the New York Academy of Sciences · preclinical
PMID 17495249
2007Thymosin beta-4 is essential for coronary vessel development and promotes neovascularization via adult epicardium
Annals of the New York Academy of Sciences · preclinical
PMID 17495252
2003Thymosin beta(4) reduces lethality and down-regulates inflammatory mediators in endotoxin-induced septic shock
International immunopharmacology · preclinical
PMID 12860178
2002Thymosin beta 4 promotes corneal wound healing and decreases inflammation in vivo following alkali injury
Experimental eye research · preclinical
PMID 11950239

Questions (9)

What is Thymosin Beta-4 (full)?

Thymosin Beta-4 (full) (Thymosin Beta-4 (Tβ4, full 43-residue peptide)). Endogenous 43-amino-acid actin-sequestering peptide. Promotes cell migration, angiogenesis, anti-apoptosis, and modulates inflammation/fibrosis; studied in cardiac repair and corneal/dermal wound healing.

What is Thymosin Beta-4 (full) used for?

Commonly discussed uses: wound-healing and cardiac-repair research, dry-eye/corneal research (RGN-259 in trials). There is both human and animal/preclinical research, though the depth and quality vary by indication. Note: most uses are not approved indications.

How does Thymosin Beta-4 (full) work?

Mechanism: Endogenous 43-amino-acid actin-sequestering peptide. Promotes cell migration, angiogenesis, anti-apoptosis, and modulates inflammation/fibrosis; studied in cardiac repair and corneal/dermal wound healing.

Is Thymosin Beta-4 (full) safe?

Reported considerations: ophthalmic trials: generally well tolerated, systemic safety data limited. There is both human and animal/preclinical research, though the depth and quality vary by indication. WADA-prohibited. Investigational in formal trials (e.g. ophthalmic RGN-259); not an approved therapeutic. This is not a safety endorsement; safety data for unapproved compounds is incomplete.

What is the typical dose of Thymosin Beta-4 (full)?

Commonly cited ranges (educational reference, not a recommendation): low trial-defined, typical investigational (e.g. ophthalmic drops in trials), high trial-defined. Administration: topical/ophthalmic (trials), subcutaneous (research), intravenous (trials). Half-life: ~hours systemic.

Is Thymosin Beta-4 (full) legal in Australia?

Australian status: Not ARTG-registered; research; WADA prohibited (as TB-500/Tβ4). WADA-prohibited. Investigational in formal trials (e.g. ophthalmic RGN-259); not an approved therapeutic. General regulatory context: most active peptides are Schedule 4 and require a prescription; import via the Personal Importation Scheme requires a valid Australian prescription for prescription-only goods.

How do you store Thymosin Beta-4 (full)?

Reconstitution/storage reference: research/trial-defined; storage: refrigerated.

What is Thymosin Beta-4 (full) commonly stacked with?

Commonly discussed combinations (anecdotal for unapproved compounds): research/clinical-trial use; distinct from grey-market 'TB-500'. Stacking increases interaction/safety uncertainty.