CognitiveResearch profile

PE 22-28

Spadin Analog · Spadin-Derived Peptide 22-28

Think of it as a mood elevator for your brain's power grid.

PE 22-28 is like a little helper that tunes your brain's electrical system to lift your spirits. It targets a specific channel in your brain cells that usually acts like a dimmer switch, turning down the brightness on your mood. By blocking this channel, PE 22-28 helps dial up the activity of certain brain cells, which can lead to a quicker mood boost.

Unlike traditional mood lifters that might take weeks to kick in, this peptide shows promise in delivering faster results. Researchers have seen antidepressant-like effects in animal tests within hours, which is pretty impressive. Plus, it's designed to be more stable and effective than its predecessor, making it a potentially more efficient option for mood support.

Who it's for

Individuals looking for a rapid mood lift
Tech enthusiasts interested in cutting-edge brain science
People curious about alternatives to traditional mood boosters

Probably not for you if…

Those uncomfortable with experimental or early-stage compounds
People seeking a long-term solution without ongoing research
Individuals sensitive to potential mood fluctuations

Editorial summary for research context · Not medical advice

Mechanism of Action

PE 22-28 is a short 7-amino-acid peptide derived from the spadin sequence, itself a fragment of the propeptide of sortilin. Research suggests it selectively blocks the TREK-1 two-pore-domain potassium channel, which has been implicated in depression-related research based on TREK-1 knockout mouse phenotypes. By inhibiting TREK-1, PE 22-28 is hypothesized to increase serotonergic neuron excitability in the dorsal raphe, producing rapid antidepressant-like effects in rodent models without the delayed onset of SSRIs.

Researched Benefits

TREK-1 blockade

Preclinical electrophysiology confirms selective inhibition of TREK-1 currents, sparing other K2P channels.

[Veyssiere et al. 2015]

Rapid antidepressant-like activity (rodent)

Forced-swim and novelty-suppressed feeding paradigms show effects emerging within hours in mice.

[Mazella et al. 2010 (parent spadin)]

Improved drug-like properties vs parent spadin

Shorter sequence is reported to offer better stability and CNS penetration than full-length spadin in preclinical work.

Research Protocols

The following dosing ranges have appeared in published research protocols. Presented for informational purposes only — not a recommendation for human use.

Subcutaneous research (animal-model-derived)

Dosage: 250 mcg
Frequency: once daily
Timing: morning
Cycle: 2 weeks

No validated human protocol exists. Rodent research has used low-microgram/kg IP or SC dosing; human equivalents are extrapolation-only.

Reported Side Effects

Injection-site reactions
Headache or light-headedness reported anecdotally
Theoretical concern for mood shifts, insomnia, or overstimulation
No human safety data published

Contraindications

Pregnancy and lactation
Bipolar disorder (theoretical mania risk with antidepressant-like agents)
Concurrent SSRI, SNRI, or MAOI therapy without medical supervision
Active psychiatric illness

Stacking Partners

Peptides commonly paired with PE 22-28 in published research and protocol write-ups.

cognitive

Semax

BDNF / NGF upregulation

cognitive

Selank

Anxiolytic research

Vendor Pricing

74
Modern Research Peptides
Best $/mg
Size10mg
Total$44.99
/ mg$4.50/mg
In stock
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72
Limitless Biotech
Size10mg
Total$45.99
/ mg$4.60/mg
In stock
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Gear + Companions

Reconstitution supplies and research-backed supplement companions for PE 22-28. Editorial picks only — we earn a commission through Amazon on the click, no sponsorship.

Gear you'll need

· Reconstitution + storage essentials

Bacteriostatic Water 30mL (0.9% Benzyl Alcohol)
Empower Pharmacy / generic medical supply
Reconstitutes every lyophilized peptide. 28-day viability refrigerated.
View at Pantheon →
Insulin Syringes 31G × 5/16" × 0.5mL (100 count)
EasyTouch
31G × 0.5mL insulin syringes — the default size for sub-0.25mL peptide doses.
Buy on Amazon →
Alcohol Prep Pads (Sterile, 200 count)
Dynarex
Sterile 70% IPA prep pads — one per vial stopper + one per injection site.
Buy on Amazon →
1-Quart Sharps Disposal Container
BD / Becton Dickinson
FDA-cleared sharps container — pharmacies won't accept improvised disposal.
Buy on Amazon →

Stacks well with

· Supplement companions — independent evidence, not sponsored

Alpha-GPC 600mg (60 capsules)
Double Wood
Choline donor — upregulates acetylcholine synthesis. Cognitive peptides that boost neurotransmitter signaling still need the substrate.
Buy on Amazon →
Lion's Mane Mushroom Extract (120 capsules, 2g/serving)
Host Defense / Paul Stamets
Hericium erinaceus has direct NGF + BDNF evidence. Thematic stack-mate for any neuroprotective or neurogenesis peptide protocol.
Buy on Amazon →
Omega-3 Fish Oil (Molecularly Distilled, 240 softgels)
Nordic Naturals
DHA is the structural fat of neural membranes — cognitive peptide protocols benefit from optimized membrane lipids.
Buy on Amazon →

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Research Papers

A novel strategy for antidepressants: specific blockade of the TREK-1 potassium channel by spadin
Mazella J, et al. · PLoS Biology · 2010
PubMed 20231872 →
Retro-inverso analogues of spadin display increased antidepressant effects
Veyssiere J, et al. · Psychopharmacology · 2015
PubMed 25398466 →

PE 22-28

Mechanism of Action