PE-22-28

PE-22-28 is a synthetic TREK-1 antagonist peptide studied for rapid antidepressant-like and neuroprotective effects in preclinical models, with no human clinical trials available.

Profile · 01

Overview

PE-22-28 is a synthetic heptapeptide discussed as a selective antagonist of the TREK-1 potassium channel. In the source literature it is positioned as a rapid-acting mood and neuroplasticity research peptide rather than a general stimulant or nootropic.

This page is necessarily more experimental than common semax- or selank-style entries because the evidence base remains preclinical. The source emphasizes potency, long duration relative to the dose, and the need for conservative measurement because the volumes are very small.

At a Glance

Goal

Support mood, neuroplasticity, and neuroprotection research through TREK-1 channel modulation

Protocol

Suggested once-daily titration approach starting low and increasing every two to four weeks.

Reconstitute

Add 3.0 mL bacteriostatic water to a 10 mg vial for about 3.33 mg/mL concentration

Typical daily range

50-200 mcg once daily

Start

50 mcg daily for Weeks 1-2

Target

100-150 mcg daily by Weeks 3-12

Frequency

Once daily (subcutaneous)

Cycle Length

8-12 weeks with optional extension to 16 weeks

Timing

Any consistent time; rotate injection sites

Route

Subcutaneous

Cycle

8-12 weeks on, 4 weeks off

Inject once daily subcutaneously at conservative doses. The source notes high potency, roughly day-long duration, and the fact that many researchers stay in the 100-150 mcg range. Because the measured volumes are tiny, smaller-capacity syringes may improve practical accuracy.

Dose progression

Weeks 1-2

50 mcg (0.05 mg) · 1.5 units (0.015 mL)

Weeks 3-8

100 mcg (0.10 mg) · 3 units (0.03 mL)

Weeks 9-12

150 mcg (0.15 mg) · 4.5 units (0.045 mL)

Weeks 13-16

200 mcg (0.20 mg) · 6 units (0.06 mL)

Important: This guide is for educational purposes only and is not medical advice. For research use only. Not for human consumption.

Science · 01

How PE-22-28 works.

PE-22-28 is discussed as a selective TREK-1 antagonist. By reducing TREK-1 channel activity, the source explains enhanced neuronal excitability and downstream signaling through pathways tied to serotonergic firing, BDNF expression, synaptic plasticity, and neurogenesis.

The source also highlights preclinical stroke and neuroprotection findings, plus a lack of hERG-channel or broad hemodynamic liabilities in animal work. Even so, all of that remains preclinical and does not replace human safety data.

Science · 02

Effects

Observations from clinical or preclinical literature.

Preclinical models suggest rapid antidepressant-like behavioral effects

Animal and cell work also suggest increased neurogenesis, synaptogenesis, and BDNF signaling

May have neuroprotective relevance in injury or stroke-related preclinical models

Human efficacy and safety data are absent

Mild injection-site irritation may occur

Very small injection volumes make measurement accuracy especially important

Science · 03

Caution

Not recommended during pregnancy or breastfeeding because safety data is absent

Use caution with antidepressants or other CNS-active compounds due to uncertain interaction effects

Use caution in psychiatric or neurologic conditions without qualified oversight

All dosing here is extrapolated from preclinical work rather than human trials

Important: This guide is for educational purposes only and is not medical advice. For research use only. Not for human consumption.

Lifestyle · 01

CoFactors

Omega-3 fatty acids

Support neuronal membrane function and inflammatory balance.

B vitamins

Support neurotransmitter synthesis and methylation.

Magnesium

Supports neuronal signaling and stress resilience.

Vitamin D

Relevant to mood and neuroprotective biology.

Lifestyle · 02

Life Factors

Complementary strategies for best outcomes.

Maintain consistent sleep because sleep strongly shapes mood and neuroplasticity outcomes

Use regular exercise to reinforce BDNF and resilience pathways

Prioritize a nutrient-dense diet rich in omega-3s and B-vitamin sufficiency

Track mood and cognition with context rather than reacting to daily noise

Lifestyle · 03

Metrics

Day-to-day metrics worth tracking through the protocol.

Mood and cognitive clarity - useful for observing trend changes
Sleep quality - an important confounder and outcome marker
Stress and anxiety levels - helpful for protocol context
Injection-site reactions - note redness, swelling, or discomfort

Lifestyle · 04

Labs

Baseline and periodic bloodwork to monitor systemic health during the protocol.

CBC (Complete Blood Count)

General baseline and follow-up monitoring.

CMP (Comprehensive Metabolic Panel)

Assesses liver and kidney function during the protocol.

TSH and thyroid panel

Useful broader neurologic and metabolic baseline context.

Vitamin D, B12, folate

Ensure key neuro-support cofactors are not low.

Calculators · 01

Supplies Calculator

Estimates assume the schedule defined for this peptide.

Length

Vial size

Bac. water

Syringe

Vials

0 × 10 mg each…

Syringes

Bac. water

0 mL

Swabs

02 per syringe

Calculators · 02

Dose Calculator

Vial

Bac. water

Syringe

Dose

Concentration

0mcg/mL

Volume per dose

0mL

…

Practice · 01

Preparation

Careful technique preserves potency. Solution should be clear — do not shake.

Allow vial to reach room temperature for 15–20 minutes before reconstitution.
Draw the chosen bacteriostatic water volume with a sterile syringe.
Inject slowly down vial wall; avoid foaming.
Gently swirl/roll until dissolved (do not shake).
Label with reconstitution date and refrigerate at 2–8 °C (35.6–46.4 °F), protected from light.
Use within 30 days; discard any unused solution after 30 days.

Practice · 02

Technique

General subcutaneous guidance from clinical best-practice resources.

Clean the vial stopper and injection site with alcohol and allow them to dry fully

Pinch a skinfold and insert the needle at 45-90 degrees into subcutaneous tissue

Do not aspirate for subcutaneous injections; inject slowly and steadily

Consider smaller-capacity insulin syringes because the measured volumes are tiny

Rotate sites across the abdomen, thighs, and upper arms and discard syringes safely

Important: This guide is for educational purposes only and is not medical advice. For research use only. Not for human consumption.

Practice · 03

Storage

Lyophilized

Store at room temp in dry, dark conditions; minimize moisture exposure.

Reconstituted

Refrigerate at 2–8 °C (35.6–46.4 °F); avoid freeze–thaw cycles. Discard reconstituted vials after 30 days.

Notes

Allow vials to reach room temperature before opening to reduce condensation uptake.

Reference · 01

Notes

Use a new sterile insulin syringe for each injection and dispose of it safely

Many practical doses are only a few units or less, so measurement precision matters

This is a highly experimental neuropeptide entry with no human clinical trials

Document dose, timing, and cognitive or mood observations carefully for consistency

PepTribe is an educational platform. This information is for research and learning purposes only and is not medical advice.

Reference · 02

References

PNAS
Bhatt et al. on PE-22-28 rapid antidepressant-like effects and neurogenesis in mice.
https://pubmed.ncbi.nlm.nih.gov/28559317/
Neuropharmacology
Spadin and TREK-1 channel antagonism in antidepressant design.
https://pubmed.ncbi.nlm.nih.gov/20170666/
Molecular Psychiatry
TREK-1 deletion and depression-resistant phenotype work.
https://pubmed.ncbi.nlm.nih.gov/16924269/
Frontiers in Pharmacology
Review of TREK-1 channels in mood disorders and neuroprotection.
https://www.frontiersin.org/journals/pharmacology
CDC
Subcutaneous injection route guidance.
https://www.cdc.gov/vaccines/hcp/admin/downloads/YCTS-VaxAdmin-Subcut-injection.pdf