DADLE vs DPDPE
Head-to-head comparison of DADLE ([D-Ala2, D-Leu5]-enkephalin) and DPDPE ([D-Pen2, D-Pen5]-enkephalin) — benefits, dosing, side effects, research data, and where to buy.
| Property | DADLE | DPDPE |
|---|---|---|
| Category | Pain Management | Pain Management |
| Full Name | [D-Ala2, D-Leu5]-enkephalin | [D-Pen2, D-Pen5]-enkephalin |
| Molecular Weight | 569.67 Da | 645.79 Da |
| Half-Life | 5-20 minutes in plasma | 15-60 minutes in plasma |
| Amino Acids | 5 | 5 |
| Typical Dose | 0.01-2 ug per animal | 0.01-1 ug per animal |
| Route | Intrathecal / intracerebroventricular | Intrathecal / intracerebroventricular |
| Purity | ≥98% | ≥98% |
| Studies Count | 450 | 800 |
| Research Status | Pre-clinical | Pre-clinical |
DADLE Benefits
- ✓delta-opioid agonism
- ✓enhanced peptide stability
- ✓spinal analgesia models
- ✓research on tolerance mechanisms
DPDPE Benefits
- ✓delta-opioid selectivity
- ✓improved conformational stability
- ✓analgesic receptor mapping
- ✓useful in chronic pain models
DADLE Dosing
Intrathecal 0.01-2 ug per animal|Intracerebroventricular 0.01-1 ug per animal|In vitro 0.1-50 nM
DPDPE Dosing
Intrathecal 0.01-1 ug per animal|Intracerebroventricular 0.01-0.5 ug per animal|In vitro 0.1-20 nM
DADLE Side Effects
- ⚠sedation
- ⚠motor suppression at higher doses
- ⚠opioid tolerance with repeated exposure
DPDPE Side Effects
- ⚠sedation
- ⚠nausea-like opioid effects
- ⚠tolerance with repeated dosing
Research Overview
DADLE
DADLE has been studied for analgesic, neuroprotective, and receptor-selective opioid effects in animal and tissue models. It remains important as a mechanistic probe because it is more stable than endogenous enkephalins but still peptide-like in its delivery constraints.
DPDPE
DPDPE is widely cited in opioid pharmacology because it helped establish the functional role of delta-opioid receptors in pain control. Its constrained structure is also used to explore how peptide cyclization changes potency, stability, and tissue selectivity.
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