How it calms: GABA & enkephalin
Selank's anti-anxiety effect rests on two well-studied levers: an indirect influence on the GABA system and the inhibit…
Calming the brain without hijacking it
Selank's anti-anxiety effect rests on two well-studied levers: an indirect influence on the GABA system and the inhibition of enzymes that break down the body's own calming opioid peptides. Neither lever is the brute-force receptor activation a benzodiazepine uses.
This unit unpacks both mechanisms with their primary English-language evidence, showing how Selank turns up the brain's existing calm signals rather than forcing new ones.
Key terms
The indirect GABA lever
GABA is the brain's main calming neurotransmitter, and its GABA-A receptors are where benzodiazepines act. Selank influences this system too, but through a fundamentally indirect route: it modulates GABA binding at a non-benzodiazepine site and it changes the expression of GABA-related genes over hours.
The two routes reinforce a single theme: Selank re-tunes GABA signaling rather than seizing it. Radioligand work (Vyunova and colleagues) places its binding away from the benzodiazepine site. In rat frontal cortex, Volkova and colleagues found Selank moved GABA-A subunit transcripts (Gabrb3, Gabre and Gabrq were the largest shifts) in a pattern closely correlated with GABA's own. In IMR-32 neuroblastoma cells, Filatova and colleagues found the opposite for Selank alone, reporting no change in the mRNA levels of the genes studied, while Selank almost completely suppressed the changes GABA produced. That contrast is itself the argument for an indirect, modulatory action rather than a direct transcriptional one.
AdvancedSelank can even block a benzodiazepine
In some [3H]GABA binding assays, Selank does not simply add to benzodiazepine or olanzapine activity, it can block their modulatory effect. That cross-talk is strong evidence that Selank is acting at a distinct, non-benzodiazepine site. It also flags why combining Selank with benzodiazepines is pharmacologically unpredictable and should not be assumed to be simply additive.