Glossary

Thymosin Alpha-1

Compound

Thymosin Alpha-1 — A 28-amino acid peptide originally isolated from thymus tissue, studied extensively for its immunomodulatory properties and T-cell activation effects.

What Is Thymosin Alpha-1?

Thymosin alpha-1 is a 28-amino acid peptide originally isolated from thymic tissue by Dr. Allan Goldstein at George Washington University in the 1970s. It is an acetylated peptide with a molecular weight of 3108 Da. It is the most extensively clinically studied thymic peptide, with regulatory approval in over 35 countries.

Mechanism of Action

Thymosin alpha-1 acts primarily through Toll-like receptors TLR2, TLR7, and TLR9 on dendritic cells and macrophages. Activation of these receptors triggers MyD88-dependent signaling cascades that enhance antigen presentation, promote T-cell maturation, and stimulate cytokine production including IL-2, IL-12, and interferon-alpha.

The peptide drives differentiation of CD4+ T-helper cell precursors and enhances natural killer (NK) cell cytotoxicity. It also modulates the Th1/Th2 balance, promoting cell-mediated immunity over humoral responses.

Clinical and Preclinical Research

Hepatitis B: Thymosin alpha-1 (marketed as Zadaxin) has been studied in multiple Phase III clinical trials for chronic hepatitis B, showing improved viral clearance rates
Hepatitis C: Combination studies with interferon demonstrated enhanced sustained virological response rates
Immunodeficiency: Research demonstrated restoration of T-cell subsets in immunocompromised models
Vaccine adjuvant: Studies showed enhanced antibody responses and T-cell immunity when co-administered with influenza and hepatitis B vaccines

Storage and Reconstitution

Store lyophilized thymosin alpha-1 at -20°C. Reconstitute with sterile water or bacteriostatic water. Due to its larger size (28 residues), allow adequate time for complete dissolution. Use reconstituted solutions within 14 days at 2-8°C.

Frequently Asked Questions

What is Thymosin Alpha-1?

A 28-amino acid peptide originally isolated from thymus tissue, studied extensively for its immunomodulatory properties and T-cell activation effects.

Why is Thymosin Alpha-1 important in peptide research?

Thymosin Alpha-1 is a fundamental concept in compound as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.

Authority Sources

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