Selank

What is Selank?

Selank is a synthetic heptapeptide with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro (TKPRPGP). It was designed as an analogue of tuftsin, a short immunopeptide involved in the functioning of the immune system. The addition of Pro-Gly-Pro is intended to increase stability and prolong its action.

Selank was developed in a Russian academic environment, where it was studied mainly in connection with anxiety, stress and immune modulation. In Russia it is registered for certain indications, but in the EU it is not approved as a medicine.

What does the research show?

Preclinical studies have reported:

• reduced anxious behaviour in animal models;
• an effect on BDNF expression and neuroplasticity;
• modulation of GABAergic and monoaminergic signalling pathways;
• changes in immune markers, which makes sense given its origin from tuftsin.

GABA is the main inhibitory neurotransmitter in the brain, so the hypothesis of anxiolytic activity is biologically plausible. However, the path from receptors to a feeling of calm is long, with many intervening variables.

What matters when interpreting the evidence?

A large part of the literature comes from a limited number of research groups, often with small samples and specific methodological approaches. This does not exclude a real effect, but it means that the results must be treated with caution.

In anxiety studies, it is particularly important:

• whether validated scales and blinded assessment were used;
• whether concurrent treatment and behavioural factors were controlled for;
• whether the results are reproducible in an independent laboratory;
• what the effect size is compared with placebo.

Selank is not a medicine for anxiety

This needs to be stated clearly. Anxiety disorders are serious conditions treated with evidence-based methods — psychotherapy, medicines and other interventions. Research peptides are not a substitute for professional care and are not approved for this indication.

Our site does not offer dosing, self-treatment or advice on use in humans. The content is informational.

Quality and storage

The batch is declared with a purity of ≥ 98 % (HPLC). Store the lyophilizate at −20 °C, protected from light and moisture; after reconstitution, at 2–8 °C in accordance with the protocol.

Conclusion

Selank is an interesting Russian neuropeptide with a clear biological hypothesis and limited independent clinical support. Its research value lies in the study of stress and neuroimmune interactions, not in replacing treatment.