Thymalin (Research Overview)
Thymalin is a polypeptide complex extracted from calf thymus. It was developed in Russia by the group of V. Khavinson, and the literature describes it as the thymic counterpart of Epithalamin, a pineal extract from the same research program. Unlike a single synthetic peptide, Thymalin is a mixture, so it has no single sequence or molecular weight.
Mechanism of Action
Reviews describe Thymalin as a natural thymic peptide fraction obtained by mild acid extraction of calf thymus. Two dipeptides, Glu-Trp (EW) and Lys-Glu (KE), are named in the literature as components of the preparation, and Glu-Trp was isolated from it by reversed-phase HPLC and later made synthetically.
Proposed mechanisms in the published work come mostly from one research school. They include effects on T-lymphocyte differentiation and cytokine release in cell culture, and a 2023 computational study that modeled how the EW and KE dipeptides might interact with double-stranded DNA and gene promoters. Those proposals are hypotheses from modeling and cell-based work and have not been widely replicated by independent laboratories.
Research Areas
Cell and organ culture: studies in rat thymus and spleen explants report age-dependent changes in explant growth with thymic peptides, and a 2020 report on cultured human hematopoietic stem cells measured changes in surface markers (CD44, CD117, CD28) after exposure.
Cytokine and signaling assays: a 2022 study in the THP-1 monocyte/macrophage cell line compared Thymalin with four other Khavinson peptides, including Epitalon, and reported changes in kinase phosphorylation and in LPS-stimulated TNF and IL-6 expression. A 2013 comparison in mice and blood-cell culture measured cytokine production.
Much of the published record comes from a single research school and its collaborators, and independent replication is limited, so the findings are best read as preliminary. Reports from other settings are not summarized or endorsed here.
Findings from animal or in-vitro systems do not establish safety or efficacy for any indication and should not be interpreted as medical claims.
Specification summary
Thymalin 10mg
Stated purity ≥99%. For laboratory research use only.
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Laboratory background
Education for people working with this material in the laboratory: guides on handling and analysis, definitions of terms, and arithmetic tools. It describes no use of the material.
Guides
Glossary terms
Calculators
References
- Morozov VG, Khavinson VK. Natural and synthetic thymic peptides as therapeutics for immune dysfunction. Int J Immunopharmacol. 1997;19(9-10):501-5. PMID 9637345 · DOI
- Khavinson VKh. Peptides and Ageing. Neuro Endocrinol Lett. 2002;23 Suppl 3:11-144. PMID 12374906
- Chalisova NI, Khavinson VKh, Penniiaĭnen VA, Grigor'ev EI. [Effect of thymus polypeptide fractions on the development of rat thymus and spleen in organ culture]. Tsitologiia. 1999;41(10):889-94. PMID 10591126
- Khavinson VK, Linkova NS, Kvetnoy IM, Polyakova VO, Drobintseva AO, Kvetnaia TV, et al. Thymalin: Activation of Differentiation of Human Hematopoietic Stem Cells. Bull Exp Biol Med. 2020;170(1):118-122. PMID 33237528 · DOI
- Avolio F, Martinotti S, Khavinson VK, Esposito JE, Giambuzzi G, Marino A, et al. Peptides Regulating Proliferative Activity and Inflammatory Pathways in the Monocyte/Macrophage THP-1 Cell Line. Int J Mol Sci. 2022;23(7). PMID 35408963 · DOI
- Linkova N, Khavinson V, Diatlova A, Petukhov M, Vladimirova E, Sukhareva M, et al. The Influence of KE and EW Dipeptides in the Composition of the Thymalin Drug on Gene Expression and Protein Synthesis Involved in the Pathogenesis of COVID-19. Int J Mol Sci. 2023;24(17). PMID 37686182 · DOI
- Kuznetsova TA, Besednova NN, Zaporozhets TS, Smolina TP, Kazha AK, Ivanushko LA. [Comparative study of immunomodulatory activity of peptides, tinrostim and thymalin]. Antibiot Khimioter. 2013;58(11-12):8-12. PMID 24734422
Cited literature is provided for scientific context only and does not describe or endorse any use of these products.
Thymalin FAQ
What is Thymalin?
Thymalin is a polypeptide complex extracted from calf thymus.
What is Thymalin?
Thymalin is a polypeptide complex extracted from calf thymus and developed by V. Khavinson's group in Russia. It is a mixture of peptides rather than a single defined peptide, so it has no single sequence or molecular weight.
How is Thymalin related to Epitalon?
Both come from the same Russian bioregulator research program. Epithalamin is the pineal extract and Epitalon (AEDG) is its short synthetic counterpart, while Thymalin is the thymus extract. They are separate materials.
What models appear in the Thymalin literature?
Cell and organ culture (rat thymus and spleen explants, human hematopoietic stem cells, THP-1 monocytes), cytokine assays and computational modeling of its component dipeptides. See the cited references; we summarize study designs only.
Is this material for human or veterinary use?
No. Sealed Peptides sells research compounds for laboratory research use only. They are not for human or veterinary use, and we give no use or dosing guidance.
Does Sealed Peptides list Thymalin?
Yes. Thymalin 10mg is listed as a lyophilized research compound with stated purity of at least 99%. Its product page lists sizes, specifications and storage.
Where are the studies cited on this page?
This overview cites 7 published papers, listed under References with PubMed links. Cited literature is scientific context only and does not describe any use of the product.
How are lyophilized research peptides usually stored?
Lyophilized powders are generally kept sealed, dry, protected from light and frozen (around -20°C). Each product page lists its stated storage condition, and our peptide storage guide explains the reasoning.
More answers: Site FAQ · Storage guide · Storage reference tables
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For laboratory research use only. Not for human or veterinary use. Not intended to diagnose, treat, cure, or prevent any disease.
