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Peptide Database

Immune research

Thymulin (Facteur Thymique Sérique): Research Overview

Zinc-dependent thymic hormone studied in T-cell development and immune ageing research.

Also known as FTS · facteur thymique sérique · Facteur Thymique Sérique

Research use onlyStrongest evidence: review or meta-analysisReviewed
DatabaseReferences

What is Thymulin?

Thymulin is a nonapeptide hormone exclusively secreted by thymic epithelial cells, discovered by Jean-François Bach in the 1970s. Unlike thymalin (a peptide extract mixture), thymulin is a single, defined 9-amino-acid peptide that requires zinc binding for biological activity. It plays a crucial role in T-cell differentiation and maturation within the thymus.

What is Thymulin researched for?

  • Age-related decline in thymulin correlates with reduced immune function; supplementation may restore T-cell parameters.
  • Promotes differentiation and maturation of T-lymphocytes in thymus.
  • Thymulin activity depends on zinc; studied in zinc-depleted conditions.
  • Research shows thymulin suppresses pro-inflammatory cytokines and mediators.
  • Investigated for potential to restore immune balance in autoimmune states.
  • Studied for effects on pancreatic beta cells and immune modulation in diabetes models.
  • Thymulin influences hypothalamic-pituitary-adrenal axis function.
  • Some research suggests protective effects on neural tissue.

How does Thymulin work?

Thymulin exerts its effects through binding to high-affinity receptors on T-lymphocytes and other immune cells. The zinc-thymulin complex is the biologically active form - without zinc, the peptide has no immunological activity.

References

  1. Thymulin (FTS) - A Thymic Hormone Bach JF, Dardenne M Clinics in Immunology and Immunopathology

    1989

    Comprehensive review of thymulin discovery, structure, and immunological functions.

    Review or meta-analysis

  2. The neuroendocrine role of thymulin

    Journal of Neuroimmunology · 2000

    Thymulin modulates hypothalamic-pituitary-adrenal axis and has neuroendocrine effects beyond immunity.

  3. Zinc and thymulin Advances in Experimental Medicine and Biology Zinc is essential for thymulin biological activity; zinc deficiency causes functional thymulin deficiency.

  4. Zinc is essential for thymulin biological activity; zinc deficiency causes functional thymulin deficiency.

  5. Thymulin and aging Mechanisms of Ageing and Development Serum thymulin levels decline dramatically with age, correlating with immunosenescence and increased infection susceptibility.

  6. Serum thymulin levels decline dramatically with age, correlating with immunosenescence and increased infection susceptibility.

Common questions

Is Thymulin different from Thymalin or Thymosin Alpha-1?

Yes, Thymulin (FTS - Serum Thymic Factor) is a unique 9-amino-acid nonapeptide hormone naturally secreted by thymic epithelial cells, discovered by Jean-François Bach. Thymalin is a peptide mixture; Thymosin Alpha-1 is a 28-amino-acid synthetic peptide. All three are thymic-derived but structurally distinct.

Does Thymulin require zinc supplementation to work?

Yes, Thymulin absolutely requires zinc (Zn2+) for biological activity - the zinc-thymulin complex is the active form. Without adequate zinc, the peptide has zero immunological activity. Ensure sufficient zinc intake during Thymulin use (zinc supplements or dietary sources like oysters, beef, pumpkin seeds).

How does Thymulin address age-related immune decline?

Serum Thymulin levels decline dramatically with age, correlating with immunosenescence. Thymulin supplementation promotes T-cell differentiation, modulates cytokine release, regulates T-helper/T-suppressor balance, and enhances NK cell activity - essentially restoring youthful T-cell function in aging individuals.