What is Selank?
Selank is a synthetic heptapeptide with the amino-acid sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro. It was designed as a stabilized analog of tuftsin, a naturally occurring immunomodulatory tetrapeptide, extended with a Pro-Gly-Pro tripeptide to slow enzymatic breakdown and prolong its activity. In the scientific literature Selank is most often described as an anxiolytic and nootropic peptide studied in laboratory models.
Selank was developed by researchers at the Institute of Molecular Genetics and the V.V. Zakusov Research Institute of Pharmacology of the Russian Academy of Sciences, and most of the published work on it originates from that research tradition. Throughout this guide the compound is discussed strictly as a research material — it is intended exclusively for laboratory use and is not a medicine.
The essentials at a glance
Tuftsin-derived heptapeptide
A stabilized analog of the immunopeptide tuftsin, extended with Pro-Gly-Pro for a longer half-life.
GABAergic angle
Research characterizes Selank as a positive allosteric modulator of GABA-receptor binding in model systems.
Research use only
Studied in anxiety, stress, and cognition models — never for human or animal use.
99%+ verified purity
HPLC-verified and confirmed by LC-MS, with a batch-specific certificate of analysis.
Explore research-grade Selank
HPLC-verified to 99%+ purity, batch-specific COA, fast U.S. shipping — for laboratory research use only.
View SelankHow Selank is studied: mechanism in research models
Because Selank is a short peptide, researchers have examined several parallel pathways to characterize its activity. No single mechanism fully accounts for the effects reported in the literature, but a few recurring themes appear across studies:
- GABA-receptor system — radioligand-binding research has characterized Selank as a concentration-dependent positive allosteric modulator of GABA binding, distinct from how classical benzodiazepines act.
- Enkephalin / opioid system — studies have reported that Selank influences enkephalin activity and that its effects can be altered by opioid-receptor antagonists such as naloxone.
- Neurotrophic and immune signaling — as a tuftsin analog, Selank has been investigated for effects on neurotrophic factors and cytokine/immune-related gene expression in model systems.
One frequently cited feature is that Selank has been studied alongside benzodiazepines such as diazepam, where preclinical research has evaluated how the peptide modulates their activity. This combined-signaling profile is a major reason Selank draws interest as a distinct research tool.
Selank and related research peptides
Selank is frequently discussed alongside Semax, another synthetic peptide from the same Russian research programs. Both are short, proline-rich peptides studied in neuroscience models, but they derive from different parent molecules and are characterized differently in the literature:
| Peptide | Sequence origin | Primary research framing | Class |
|---|---|---|---|
| Selank | Tuftsin analog | Anxiolytic / stress models | Regulatory heptapeptide |
| Semax | ACTH(4-10) analog | Nootropic / neuroprotective models | Regulatory heptapeptide |
| Tuftsin | Endogenous fragment | Immunomodulatory research | Immunopeptide |
Peptora carries research-grade versions of several related peptides, including Selank and Semax, each accompanied by its own batch-specific certificate of analysis.
What the research explores
In laboratory settings, Selank has most often been studied across a handful of interconnected areas:
- Anxiety models — behavioral paradigms such as the elevated plus maze have been used to evaluate anxiolytic-like activity in rodents.
- Stress and withdrawal models — preclinical research has examined Selank in chronic-stress and substance-withdrawal paradigms.
- Cognition and memory — some studies report nootropic-like effects and changes in learning-related behavior.
- Neurochemical signaling — GABAergic, enkephalinergic, and neurotrophic pathways have all been examined to explain the observed effects.
Purity, testing, and certificates of analysis
In research, the reliability of a result depends on the identity and purity of the material behind it. Every batch of Selank from Peptora is HPLC-verified to 99%+ purity, confirmed by LC-MS identity testing, and screened across a full quality-control panel before release. Each order ships with a lot-specific certificate of analysis (COA) so the material can be matched to its documentation.
Researchers often choose Peptora precisely because this documentation is standard rather than optional. To understand what each figure on a report means, see the guide on the certificate of analysis.
Handling Selank in the laboratory
Selank is supplied as a lyophilized (freeze-dried) powder. Before research use it is reconstituted with bacteriostatic water, which is sold separately. Proper handling preserves peptide integrity and the validity of downstream work:
- 1Allow the sealed vial to reach room temperature before opening.
- 2Add bacteriostatic water slowly against the vial wall; swirl gently and do not shake.
- 3Let the powder dissolve fully before drawing.
- 4Store the reconstituted solution refrigerated and protected from light.
Full step-by-step protocols live in the reconstitution guide. Following them consistently is one of the simplest ways to keep research reproducible.
Scientific references
Selank has been studied in cell-culture, animal, and some clinical research over roughly two decades. The literature below is provided for educational context, per PubMed, and describes model-system and clinical research on the compound — not the laboratory research product supplied by Peptora.
- 1Vyunova TV, Andreeva L, Shevchenko K, Myasoedov N. Peptide-based Anxiolytics: The Molecular Aspects of Heptapeptide Selank Biological Activity. Protein Pept Lett. 2018;25(10):914-923. doi:10.2174/0929866525666180925144642.
- 2Kasian A, Kolomin T, Andreeva L, et al. Peptide Selank Enhances the Effect of Diazepam in Reducing Anxiety in Unpredictable Chronic Mild Stress Conditions in Rats. Behav Neurol. 2017;2017:5091027. doi:10.1155/2017/5091027.
- 3Kolik LG, Nadorova AV, Kozlovskaya MM. Efficacy of peptide anxiolytic selank during modeling of withdrawal syndrome in rats with stable alcoholic motivation. Bull Exp Biol Med. 2014;157(1):52-55. doi:10.1007/s10517-014-2490-4.
- 4Panikratova YR, Lebedeva IS, Sokolov OY, et al. Functional Connectomic Approach to Studying Selank and Semax Effects. Dokl Biol Sci. 2020;490(1):9-11. doi:10.1134/S001249662001007X.
- 5Medvedev VE, Tereshchenko ON, Kost NV, et al. Optimization of the treatment of anxiety disorders with selank. Zh Nevrol Psikhiatr Im S S Korsakova. 2015;115(6):33-40. doi:10.17116/jnevro20151156133-40.
Explore research-grade Selank
HPLC-verified to 99%+ purity, batch-specific COA, fast U.S. shipping — for laboratory research use only.
View SelankKey takeaways
- Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro), a stabilized analog of the immunopeptide tuftsin.
- It has been investigated in research as an anxiolytic and nootropic peptide, most often in stress and cognition models.
- Published work characterizes its interaction with the GABA-receptor system, the enkephalin/opioid system, and neurotrophic signaling.
- Much of the literature originates from a single Russian research tradition and remains evolving rather than clinically established.
- Peptora's Selank is HPLC-verified to 99%+ purity with a lot-specific certificate of analysis, supplied for research use only.
Frequently asked questions
This article is intended solely as an educational summary of publicly available scientific literature. Products offered by Peptora are supplied exclusively for laboratory research purposes and are not approved for human or veterinary use. The information presented should not be interpreted as medical advice, treatment recommendations, or clinical guidance.
