PE-22-28

Cognition, Mood & Neuroprotection
Preclinical

PE-22-28 is a synthetic seven-amino-acid peptide designed to block a specific potassium channel (TREK-1) in the brain. Research in animal models focuses on antidepressant-like effects and cognitive enhancement through brain growth factor support and increased brain cell adaptability.

Last updated February 22, 2026
31 PubMed-Verified Studies
Moderate
Research-Driven Dosage Reports
RouteIntranasal · Subcutaneous (SC)
Dose100–500 mcg (estimated from preclinical data)
Frequency1× daily
Duration2–4 weeks

Based on published research literature.

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Overview of PE-22-28

Inhibits TREK-1 potassium channels to enhance serotonergic neurotransmission and rapidly upregulate BDNF, producing antidepressant and cognitive-enhancing effects.

Mood / antidepressant

Blocks TREK-1 (TWIK-Related K+ Channel 1), a background potassium channel whose deletion in mice produces a depression-resistant phenotype.

TREK-1 inhibition increases serotonergic neurotransmission in the dorsal raphe nucleus (proposed), mimicking effects of SSRIs with faster onset.

Produces antidepressant-like effects within days in preclinical models, faster than the typical 2-4 week onset of conventional antidepressants.

Neuro / cognition

Rapidly upregulates BDNF expression in the hippocampus (proposed), promoting synaptogenesis and neuroplasticity.

May enhance hippocampal neurogenesis (proposed), supporting memory formation and cognitive resilience.

Smaller and more stable than parent compound spadin, with improved pharmacokinetic properties (proposed)

Read Full PE-22-28 Dosage Guide

Research-backed dosing protocols, timing, and administration details

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Cognition, Mood & Neuroprotection