Leu-enkephalin vs Histatin-5
Head-to-head comparison of Leu-enkephalin (Tyr-Gly-Gly-Phe-Leu) and Histatin-5 (Human histatin 5) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Leu-enkephalin | Histatin-5 |
|---|---|---|
| Category | Pain Management | Dental & Oral |
| Full Name | Tyr-Gly-Gly-Phe-Leu | Human histatin 5 |
| Molecular Weight | 555.63 Da | 3035 Da |
| Half-Life | 1-5 minutes in plasma | minutes in saliva |
| Amino Acids | 5 | 24 |
| Typical Dose | 0.1-5 ug per animal | 1-100 µM in research formulations |
| Route | Intrathecal / intracerebroventricular | Topical/Oral rinse |
| Purity | ≥98% | ≥98% |
| Studies Count | 1000 | 120 |
| Research Status | Pre-clinical | Pre-clinical |
Leu-enkephalin Benefits
- ✓delta-opioid activity
- ✓endogenous analgesic model
- ✓receptor-selective pharmacology
- ✓nociception pathway research
Histatin-5 Benefits
- ✓anti-Candida activity
- ✓biofilm suppression
- ✓mucosal wound support
- ✓oral innate immunity
Leu-enkephalin Dosing
Intrathecal 0.1-5 ug per animal|Intracerebroventricular 0.1-2 ug per animal|In vitro 1-100 nM
Histatin-5 Dosing
topical rinse or gel|short contact exposure|repeat applications in research protocols
Leu-enkephalin Side Effects
- ⚠sedation
- ⚠constipation-like opioid effects
- ⚠very short plasma stability
Histatin-5 Side Effects
- ⚠local irritation
- ⚠proteolytic instability
- ⚠dose-dependent cytotoxicity in vitro
Research Overview
Leu-enkephalin
Leu-enkephalin is a standard tool in opioid receptor and pain-transmission research because it helps distinguish delta- from mu-preferring signaling. Its research value is high, but its clinical utility is limited by rapid enzymatic breakdown and delivery challenges.
Histatin-5
Histatin-5 is a major salivary defense peptide that can kill Candida species and influence oral microbial communities. It is also investigated for wound-healing and xerostomia-associated oral infection models.
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