Selank: A Synthetic Tuftsin Analog — Research Overview
Selank: A Synthetic Tuftsin Analog — Research Overview
Selank (TP-7) is a synthetic heptapeptide with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro. It was developed at the Institute of Molecular Genetics of the Russian Academy of Sciences by combining the endogenous immunomodulatory tetrapeptide tuftsin (Thr-Lys-Pro-Arg) with a C-terminal Pro-Gly-Pro sequence, which stabilizes the molecule against enzymatic degradation. Selank was designed as a dual-purpose compound, intended to retain tuftsin's immunomodulatory properties while introducing anxiolytic and nootropic activity through its interaction with the central nervous system (Seredenin et al., Bulletin of Experimental Biology and Medicine, 1998; PMID: 9783195).
Mechanism of Action
Selank's mechanism of action involves multiple neurotransmitter systems:
GABAergic modulation: In preclinical studies, Selank has been observed to allosterically modulate GABA-A receptors, enhancing GABAergic transmission without directly binding to the benzodiazepine site. This mechanism is distinct from classical benzodiazepines and may account for the observed anxiolytic effects without associated sedation or dependence in animal models (Seredenin & Gudasheva, CNS Neuroscience & Therapeutics, 2011).
Monoamine regulation: Selank has been observed to influence the metabolism of serotonin (5-HT), dopamine (DA), and norepinephrine (NE) in brain regions including the hypothalamus, hippocampus, and frontal cortex. Researchers have reported altered expression of enzymes involved in monoamine catabolism following Selank administration.
BDNF expression: In rodent models, Selank has been associated with increased expression of brain-derived neurotrophic factor (BDNF) in the hippocampus. BDNF is a key neurotrophin involved in neuronal plasticity, survival, and memory formation (Inozemtseva et al., Bulletin of Experimental Biology and Medicine, 2008; PMID: 19110580).
Immune modulation: Through its tuftsin-derived component, Selank retains immunomodulatory properties. In laboratory studies, the peptide has been observed to influence the activity of natural killer cells, modulate cytokine expression (including IL-6 and IFN-α), and affect immunoglobulin levels.
Published Research
Anxiolytic effects: In elevated plus-maze and light-dark box paradigms (standard anxiety models in rodents), Selank administration was associated with increased exploratory behavior in anxiety-provoking zones, comparable to the effects of diazepam but without the motor coordination impairment observed with benzodiazepine treatment (Seredenin et al., Bulletin of Experimental Biology and Medicine, 1998; PMID: 9783195).
Cognitive function: In Morris water maze and passive avoidance paradigms, Selank-treated rodents demonstrated improved spatial learning and memory retention compared to controls. These effects correlated with increased hippocampal BDNF expression in treated groups (Inozemtseva et al., Bulletin of Experimental Biology and Medicine, 2008; PMID: 19110580).
Gene expression: Microarray studies in rodent brain tissue revealed that Selank modulates the expression of over 40 genes involved in GABAergic and serotonergic neurotransmission, neuronal plasticity, and inflammatory signaling (Zolotarev et al., Molecular Biology, 2016).
Immune function: Studies examining Selank's tuftsin-derived immunomodulatory activity have observed effects on innate immune cell function, including modulation of monocyte and natural killer cell activity in cell culture systems.
Purity and Quality Considerations
Selank is a heptapeptide containing two proline residues, which can influence secondary structure and chromatographic behavior during purity analysis. Researchers should verify purity by HPLC and confirm molecular weight by mass spectrometry. As with all research peptides, proper storage at recommended temperatures is important for maintaining integrity. Learn more about peptide purity testing and quality standards.
Available for Research
CALM Peptides offers research-grade Selank with third-party purity verification. Certificates of Analysis are available upon request. Browse all sleep & neurological peptides or explore our full catalog.
Frequently Asked Questions
What is Selank?
Selank is a synthetic heptapeptide created by combining the immunomodulatory peptide tuftsin with a stabilizing Pro-Gly-Pro tail. It was developed at the Institute of Molecular Genetics of the Russian Academy of Sciences and has been studied in preclinical models for anxiolytic, nootropic, and immunomodulatory properties.
How does Selank differ from benzodiazepines in research models?
In preclinical anxiety paradigms, Selank has been observed to produce anxiolytic effects comparable to diazepam without the motor impairment, sedation, or reinforcing properties associated with benzodiazepine administration in animal models.
What is tuftsin?
Tuftsin (Thr-Lys-Pro-Arg) is a naturally occurring tetrapeptide derived from the Fc region of immunoglobulin G (IgG). It plays a role in innate immune function, particularly in stimulating phagocytic activity. Selank incorporates the tuftsin sequence as its core structure.
How is Selank related to Semax?
Both Selank and Semax were developed at the same Russian research institute as regulatory peptides with CNS activity, but they have different parent sequences and mechanisms. Semax is derived from ACTH(4-10), while Selank is derived from tuftsin. They are sometimes studied in parallel as complementary neuropeptides.
The information presented in this article is for educational and informational purposes only and is not intended as medical advice. Selank is sold as a research chemical for laboratory use only. It is not intended for human consumption, and should not be used to diagnose, treat, cure, or prevent any disease. All references to published research are provided for informational context. Consult qualified professionals for guidance related to any health condition.
For research use only. Not for human consumption.
Related Reading: What Are Peptides? · Sleep & Neurological Peptides · Semax Research Overview · DSIP Research Overview · Quality & Purity Standards
The information presented in this article is for educational and informational purposes only and is not intended as medical advice. All products referenced are sold as research chemicals for laboratory use only. They are not intended for human consumption and should not be used to diagnose, treat, cure, or prevent any disease. All references to published research are provided for informational context. Consult qualified professionals for guidance related to any health condition.