Thymosin Alpha-1
10mgVolume Pricing
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About Thymosin Alpha-1
Thymosin Alpha-1 (Tα1) is a naturally occurring 28-amino acid peptide originally isolated from thymic tissue (Thymosin Fraction 5). It is a potent immunomodulator studied for its ability to enhance T-cell maturation, dendritic cell function, and innate immune responses. Thymosin Alpha-1 is investigated in clinical research for its roles in immune reconstitution, viral hepatitis, immunodeficiency states, and as an adjunct in vaccine immunogenicity studies.
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Published Study Findings on Thymosin Alpha-1
Detailed Research & Citations
In-depth findings from peer-reviewed preclinical and clinical studies
Thymosin Alpha-1 (Tα1) is a naturally occurring 28-amino acid peptide originally isolated from Thymosin Fraction 5 of calf thymus tissue. It is a potent immunomodulator that enhances T-cell differentiation, dendritic cell maturation, and toll-like receptor signaling. Approved in over 35 countries as Zadaxin® for chronic hepatitis B, it is one of the most extensively studied immunomodulatory peptides in clinical research.
T-Cell Maturation & Differentiation
Thymosin Alpha-1 promotes the maturation and differentiation of T lymphocytes from bone marrow progenitors, enhancing both CD4+ helper and CD8+ cytotoxic T-cell populations. It restores T-cell function in immunocompromised states and augments T-cell receptor signaling.
Expert Opinion on Biological Therapy (2010)Dendritic Cell & Innate Immunity Enhancement
Tα1 activates dendritic cells through toll-like receptor (TLR) 2 and TLR9 signaling, enhancing antigen presentation, cytokine production (IL-12, IFN-α), and bridging innate and adaptive immunity. It also increases natural killer (NK) cell cytotoxicity.
Expert Opinion on Biological Therapy (2010)Chronic Hepatitis B Treatment
In multiple randomized controlled trials, Thymosin Alpha-1 demonstrated sustained virological response rates of 26–41% in chronic HBV patients, with HBeAg seroconversion and HBV DNA suppression. It was approved as Zadaxin® for this indication in over 35 countries.
Hepatology Research (2002)Hepatitis C Combination Therapy
Clinical studies showed Thymosin Alpha-1 combined with interferon-alpha produced higher sustained virological response rates in chronic HCV patients compared to interferon monotherapy, particularly in difficult-to-treat genotype 1 populations.
Hepatology Research (2002)Immune Adjunct in Cancer Immunotherapy
Thymosin Alpha-1 has been investigated as an immune adjunct in hepatocellular carcinoma (HCC), melanoma, and non-small cell lung cancer. Studies showed enhanced immune reconstitution after chemotherapy, improved vaccine immunogenicity, and increased tumor-specific immune responses when combined with standard therapies.
International Immunopharmacology (2000)Extensive Clinical Safety Profile
With over 30 years of clinical use across 35+ countries, Thymosin Alpha-1 has demonstrated an excellent safety profile. It does not cause immune overstimulation or autoimmune reactions, and side effects are generally limited to mild injection site reactions. No drug-drug interactions have been reported.
Expert Opinion on Biological Therapy (2010)View All 3 Sources
All findings above are sourced from peer-reviewed journals for educational reference. This product is for research purposes only — not for human consumption. Preclinical results may not translate to human outcomes.
Chemical Identity
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