Leu-enkephalin vs Insulin Glargine
Head-to-head comparison of Leu-enkephalin (Tyr-Gly-Gly-Phe-Leu) and Insulin Glargine (Insulin glargine (A21Gly,B31Arg,B32Arg human insulin analog)) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Leu-enkephalin | Insulin Glargine |
|---|---|---|
| Category | Pain Management | Diabetes & Metabolic |
| Full Name | Tyr-Gly-Gly-Phe-Leu | Insulin glargine (A21Gly,B31Arg,B32Arg human insulin analog) |
| Molecular Weight | 555.63 Da | 6063.6 Da |
| Half-Life | 1-5 minutes in plasma | About 12-24 hours |
| Amino Acids | 5 | 51 |
| Typical Dose | 0.1-5 ug per animal | 0.1-0.2 U/kg once daily |
| Route | Intrathecal / intracerebroventricular | Subcutaneous |
| Purity | ≥98% | ≥98% |
| Studies Count | 1000 | 13000 |
| Research Status | Pre-clinical | Approved |
Leu-enkephalin Benefits
- ✓delta-opioid activity
- ✓endogenous analgesic model
- ✓receptor-selective pharmacology
- ✓nociception pathway research
Insulin Glargine Benefits
- ✓Once-daily basal coverage
- ✓Smooth action profile
- ✓Lower nocturnal hypoglycemia risk
- ✓Improves fasting glucose control
Leu-enkephalin Dosing
Intrathecal 0.1-5 ug per animal|Intracerebroventricular 0.1-2 ug per animal|In vitro 1-100 nM
Insulin Glargine Dosing
Inject SC once daily at the same time each day|Titrate every 3-4 days to fasting glucose targets|Can be combined with prandial insulin
Leu-enkephalin Side Effects
- ⚠sedation
- ⚠constipation-like opioid effects
- ⚠very short plasma stability
Insulin Glargine Side Effects
- ⚠Hypoglycemia
- ⚠Injection-site reactions
- ⚠Weight gain
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.
Insulin Glargine
Clinical and translational studies support its use as a basal comparator because of prolonged absorption and stable glycemic control. It is heavily used in basal-bolus regimen research and insulin-delivery optimization studies.
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