Immune System Support

Tymalin

Supports immune system function and T-cell differentiation

Overview

Tymalin (Thymulin) is a synthetic nonapeptide that mimics the activity of the thymic hormone originally isolated from the thymus gland. It plays a critical role in T-lymphocyte differentiation and immune regulation. This peptide is zinc-dependent and is studied for its potential to restore immune function in states of immunodeficiency, senescence, or post-viral fatigue. Supplied as a lyophilized peptide for research use only.

Chemical Information

IUPAC Name
Thymulin (Serum Thymic Factor)
Sequence
Pyroglutamyl-L-alanyl-L-lysyl-L-seryl-L-glutaminyl-glycyl-glycyl-L-seryl-L-asparagine.
Molecular Mass
858.9 Da
Formula
C33H54N12O15
Tymalin Chemical Structure

Mechanism of Action

Functions as a zinc‑dependent metallopeptide that requires binding with zinc ions to adopt its biologically active conformation, acting as a direct analogue to the native thymic hormone Thymulin. In T‑lymphocyte development, it activates the cyclic AMP (cAMP) signaling cascade within precursor cells. This upregulation of intracellular cAMP drives the expression of critical differentiation markers (Thy‑1, CD3, CD4, CD8), transforming naive thymocytes into fully functional, competent T‑cells capable of recognizing specific antigens. Functions as a neuroendocrine regulator by bridging the immune‑endocrine axis. It influences the release of pituitary hormones (such as ACTH and β‑endorphin), helping to mitigate stress‑induced immunodeficiency and normalize immune function during periods of high physiological stress. Functions as an immune‑modulator in inflammatory states by inhibiting the NF‑κB signaling pathway. By preventing the excessive nuclear translocation of NF‑κB in immune cells, it downregulates the production of pro‑inflammatory cytokines (IL‑1β, IL‑6, TNF‑α), effectively reducing chronic inflammation and 'inflammaging' without suppressing the acute response needed for viral defense

Potential Research Fields

ImmunosenescenceT-cell differentiationPost-viral recoveryAutoimmunity modelsAnti-aging

Recent Research

Recent research (2024–2025) has repositioned Tymalin from a simple immunostimulant to a key agent in combating immunosenescence (biological aging of the immune system). The central mechanism identified is the peptide's ability to reactivate the thymic-neuroendocrine axis. In aged models, Tymalin administration—specifically in the presence of adequate Zinc—has been shown to restore the output of naive T-cells, effectively 'retraining' an aging immune system to recognize new threats. Mechanistically, new studies highlight Tymalin’s role as a potent NF-κB inhibitor. By downregulating the nuclear translocation of NF-κB (p65 subunit) in immune cells, it dampens the 'inflammaging' cytokine loop (reducing IL-1β and TNF-α) without suppressing acute viral defense. This dual action is currently being investigated for post-viral fatigue syndromes, where persistent immune dysregulation prevents full recovery. Furthermore, clinical interest has grown regarding its potential to enhance vaccine efficacy in the elderly by correcting the CD4+/CD8+ ratio prior to inoculation.

Bibliography / Scientific References

Related Peptides

Peptide Information Guide
Administration Type
Injectable (Subcutaneous)

Injectable administration protocol for research.

Vial Strength
10mg
Reconstitution
Reconstitute with 2ml bacteriostatic water
Dosage Options
250 mcg
1x daily
Standard maintenance dose in research
500 mcg
1x daily
Acute protocol dose in research
Schedule
1x daily
Timing: One specific day.
Duration
According to the Doctor
Potential Side Effects
Zinc deficiency interaction
moderatecontext-dependent
Mild injection site reaction
lowoccasional
Research Use Only

This information is for research purposes only. Always consult with a healthcare professional before starting any peptide protocol. Individual responses may vary, and proper medical supervision is recommended for all peptide therapies.