Longevity & aging

Thymosin Alpha-1

A 28-amino-acid peptide derived from prothymosin alpha, studied in immunology.

About

Thymosin alpha-1 is a 28-amino-acid peptide originally isolated from thymic tissue, where it is produced by cleavage of the precursor prothymosin alpha. It has one of the more substantial clinical literatures of any compound in this catalogue and is approved as a medicine in a number of countries, though not universally. Regulatory status should be confirmed for the relevant jurisdiction.

Mechanism

Research describes Thymosin alpha-1 as a modulator of T-lymphocyte maturation and function, with reported interaction with Toll-like receptors on dendritic cells. Published work associates it with shifts in cytokine signalling and with dendritic-cell maturation, positioning it as an immunomodulator rather than a direct stimulant or suppressant. The described activity is context-dependent, varying with the immune state of the system studied.

What research has examined

Thymosin alpha-1 has been investigated in clinical settings including chronic viral hepatitis and as an adjuvant in immunocompromised populations.