Thymosin Alpha-1 Peptide

Thymosin Alpha-1 (TA1 or Tα1) is a peptide fragment widely studied for its potential role in immune system regulation. Researchers suggest it may support T-cell production, helping the body respond to infections and limit bacterial spread.

It is a naturally occurring polypeptide found in the thymus gland and is believed to help restore and strengthen immune function. Thymosin Alpha-1 is also a component of Thymosin Fraction 5, a thymus-derived extract.

A synthetic version, known as Thymalfasin, has also been developed for research. It consists of 28 amino acids and is derived from a larger precursor protein called Prothymosin Alpha.

Overview

Early research focused on Thymosin Alpha-1’s ability to modulate immune responses. Studies suggest it may enhance immune activity by increasing cytokine production, boosting major histocompatibility complex (MHC) class I expression, and improving T-cell function.

The peptide is also believed to support natural killer (NK) cell activity, promote T-cell differentiation, and enhance interleukin-2 receptor expression, which may lead to stronger immune responses. Additionally, it may improve macrophage function and influence inflammation-related pathways.

Specifications

• Molecular Formula: C129H215N33O55

• Molecular Weight: 3108.31 g/mol

• Other Known Titles: TA1, Tα1, Thymalfasin

Research and Clinical Studies

In one clinical study involving individuals with immune dysfunction, participants showed reduced baseline immune activity compared to healthy controls. After administration of Thymosin Alpha-1, only a small number of subjects showed moderate improvement, while most exhibited minimal change, suggesting variable response depending on individual conditions.