Thymulin

Pro-inflammatory myeloid cells producing IL-1, IL-1, IL-6, and TNF- are increased in aged mice and humans, enriched in the breast tumor microenvironment, and associated with accelerated tumor progression.; Age-associated myeloid inflammatory activation is suppressed by non-bone marrow-derived circulating factors present in young hosts, as shown by heterochronic parabiosis and bone marrow chimeras.; Thymulin, a thymus-derived peptide that declines with age, suppresses pro-inflammatory cytokine production by inhibiting NF-κB signaling.; Thymulin enhances antitumor T-cell immunity, improves tumor control and survival, and sensitizes tumors to anti-PD-L1 therapy in an age-dependent manner.

Thymic peptide hormones (thymosin, thymulin, thymopoietin) circulate to impact peripheral immune cells and tumor biology.; Intrathymic T cell differentiation is regulated by stromal cell-derived hormones and cytokines.; Manipulating the thymic microenvironment may improve cancer treatment responses and reduce adverse effects.; Evidence from clinical and preclinical studies shows complex immunoendocrine interactions in anti-tumor immunity.

Thymic peptides have two known categories of effects: influence on immune cells and interconnection with neuroendocrine systems.; A third, previously unclear aspect involves intranuclear precursors of thymic peptides that are ubiquitous and highly abundant in all somatic cells.; Under stress-related conditions, these precursors are cleaved to form immunologically active peptides that leave the nucleus and intracellular spaces.; These peptides act as 'distress signals' to the immune system, functioning as stress sensors and potentially linking somatic cells to immune and neuroendocrine systems.

In the first 2 weeks of booster immunization, thymulin was repressed when reproductive hormones were severely reduced.; Later immune stages showed rising circulating thymulin that upregulated LH, FSH, and hypothalamic GnRH, though levels remained lower than controls.; Thymulin produced a feedback effect on GnRH neurons in astrocytes, while in the arcuate nucleus and median eminence, glial cells were directly affected by reproductive hormones.; Immunization against GnRH distinctly stimulated glial fibrillary acidic protein expression in the arcuate nucleus and median eminence.

Thymulin production and secretion are strongly influenced by the neuroendocrine system.; Thymulin and its synthetic analog exhibit anti-inflammatory and analgesic effects in the central nervous system and other organs.; Gene therapy with a bidirectional Tet-Off vector expressing metFTS can prevent hormonal and reproductive abnormalities in congenitally athymic mice.; Novel biotechnological tools may enable restoration of circulating thymulin levels in thymodeficient models and potentially humans.

Thymulin, thymosin-alpha, and thymopoietin show anti-inflammatory potential based on clinical and experimental studies.; Thymic hormones regulate inflammatory processes via effects on peripheral immune cell activities.; Bidirectional coupling exists between thymic hormones and the hypothalamic-pituitary-adrenal axis.; Thymic hormones may be suitable as therapeutic agents for inflammation given their roles in immune and neuroendocrine systems.

Thymulin has consistent beneficial effects in experimental models of lung diseases.; It broadly inhibits pro-inflammatory cytokines, suppresses p38 (a MAPK family member), and inhibits activation of the NF-kappaB signal pathway.; It has no toxicity even at high doses and, when expressed by adenoviral vectors, reduces immune response against viral proteins, making it attractive for lung gene therapy.; Its broad anti-inflammatory effects across several animal models make it a good candidate for future clinical trials.

Thymulin is a thymic hormone produced exclusively by thymic epithelial cells, consisting of a nonapeptide coupled to zinc, which confers biological activity.; Thymulin production and secretion is strongly influenced by the neuroendocrine system, and thymulin itself appears to act as a hypophysotropic peptide.; Thymulin has demonstrated anti-inflammatory and analgesic properties in the brain.; Adenoviral delivery of a synthetic thymulin gene into the rat brain produced much longer expression than other adenovirally mediated brain genes, suggesting thymulin's anti-inflammatory activity protects transduced brain cells; thymulin gene therapy may also help prevent endocrine and metabolic alterations in thymus-deficient animal models.

What is Thymulin?

**Mechanism of Action** Thymulin (Facteur Thymique Serique, FTS) is a zinc-dependent nonapeptide secreted by thymic epithelial cells. Its biological activity requires chelation of zinc ions, which stabilizes its conformation for binding to high-affinity receptors on T-cell precursors and mature lymphocytes. Thymulin pr

How does Thymulin work?

Zinc-dependent thymic nonapeptide that regulates T-cell differentiation and has analgesic and anti-inflammatory effects.

What is the research status of Thymulin?

Thymulin is currently classified as preclinical, with 374 research references on record. This is for research purposes only and is not medical advice.

What is the molecular weight of Thymulin?

Thymulin has a molecular weight of approximately 858.9 g/mol (formula C33H54N12O15).