Description
Selank is a synthetic heptapeptide carrying the amino acid sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro (TKPRPGP) [8]. It belongs to a class of peptide-based research compounds derived from tuftsin, a naturally occurring tetrapeptide known for its immunomodulatory properties [3]. The structural extension of the tuftsin scaffold into Selank was carried out by the Institute of Molecular Genetics of the Russian Academy of Sciences, producing a molecule with a distinct pharmacological profile suited to neurochemical and immunological investigation [8].
In laboratory settings, Selank is studied primarily as a tool for probing neurochemical signaling pathways. Preclinical research has examined its influence on brain-derived neurotrophic factor (BDNF) expression and related neuroplasticity-associated mechanisms, positioning it alongside other neuroactive peptides in investigations of HGF/c-Met signaling [1]. Its structural roots in tuftsin also make it a subject of interest in studies that sit at the intersection of neuroendocrine and immune system regulation [3].
Researchers have additionally employed Selank in animal model experiments exploring functional connectivity and peptide-mediated effects on anxiety-related circuitry. Resting-state neuroimaging work has examined how Selank modulates connectivity between the amygdala and temporal cortical regions, providing a systems-level view of its neurological activity [2]. Parallel rodent studies have investigated its interaction with GABAergic pathways, including comparisons with benzodiazepine compounds in behavioral paradigms [5].
Beyond purely neurological questions, Selank's tuftsin-derived architecture makes it relevant to research on cellular immune responses. Animal model studies have assessed its effects on leukocyte profiles and neutrophil phagocytic activity under experimental stress conditions [7], reflecting the broad scope of mechanistic questions that researchers apply this peptide to in controlled, preclinical contexts.
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References
[1] Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions. Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews, 2026. https://pubmed.ncbi.nlm.nih.gov/41490200/
[2] Functional Connectomic Approach to Studying Selank and Semax Effects. Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections, 2020. https://pubmed.ncbi.nlm.nih.gov/32342318/
[3] Tuftsin - Properties and Analogs. Current medicinal chemistry, 2017. https://pubmed.ncbi.nlm.nih.gov/28745220/
[5] Combined Action of Benzodiazepine Tranquilizers and the Peptide Anxiolytic Selank on BALB/c Mice. Нейрохимия / Neurochemical Journal, 2025. https://www.semanticscholar.org/paper/8c0573e6dee5540bd200a76a201a22a94f18a3c5
[7] Role of Semax and Selank neuropeptides in modulating cell-mediated immunity in the setting of skin burn injury. RUDN Journal of Medicine, 2024. https://journals.rudn.ru/medicine/article/download/39719/23516
[8] Selank. Wikipedia. https://en.wikipedia.org/wiki/Selank
