PACAP-38 vs BDNF
Head-to-head comparison of PACAP-38 (Pituitary Adenylate Cyclase-Activating Polypeptide-38 (human PACAP-38)) and BDNF (Brain-Derived Neurotrophic Factor (mature BDNF)) — benefits, dosing, side effects, research data, and where to buy.
| Property | PACAP-38 | BDNF |
|---|---|---|
| Category | Cognitive Enhancement | Cognitive Enhancement |
| Full Name | Pituitary Adenylate Cyclase-Activating Polypeptide-38 (human PACAP-38) | Brain-Derived Neurotrophic Factor (mature BDNF) |
| Molecular Weight | 4534 Da | 13,700 Da |
| Half-Life | minutes | minutes to hours |
| Amino Acids | 38 aa | 119 aa |
| Typical Dose | 10-100 µg preclinical range | research-only microgram range |
| Route | Intranasal | Intranasal |
| Purity | ≥98% | ≥98% |
| Studies Count | 650 | 8000 |
| Research Status | Pre-clinical | Pre-clinical |
PACAP-38 Benefits
- ✓synaptic plasticity
- ✓BDNF upregulation
- ✓neuroprotection
- ✓memory consolidation
BDNF Benefits
- ✓neurogenesis
- ✓synaptogenesis
- ✓LTP support
- ✓neuronal survival
PACAP-38 Dosing
0.1-1 nmol ICV in rodents|10-100 µg intranasal in preclinical studies|single-dose or short repeated protocols
BDNF Dosing
0.1-1 µg local or intranasal research delivery|viral or protein infusion models|acute or repeated plasticity protocols
PACAP-38 Side Effects
- ⚠headache-like effects
- ⚠flushing
- ⚠hypotension
BDNF Side Effects
- ⚠off-target neuroexcitation
- ⚠headache-like effects
- ⚠unknown systemic protein effects
Research Overview
PACAP-38
PACAP-38 is one of the most studied endogenous neuropeptides for protecting neurons from ischemic and excitotoxic damage. Preclinical literature also links it to hippocampal plasticity and learning-related signaling, including increased BDNF expression.
BDNF
BDNF is repeatedly associated with learning, long-term potentiation, and recovery from neurologic injury in preclinical literature. Direct protein delivery is difficult, so most studies focus on pathways that raise endogenous BDNF or on localized experimental administration.
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