Huwentoxin-IV vs Didemnin B
Head-to-head comparison of Huwentoxin-IV (Huwentoxin-IV from Selenocosmia huwena venom) and Didemnin B (Didemnin B) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Huwentoxin-IV | Didemnin B |
|---|---|---|
| Category | Experimental | Experimental |
| Full Name | Huwentoxin-IV from Selenocosmia huwena venom | Didemnin B |
| Molecular Weight | 4,000 Da | 1112.4 Da |
| Half-Life | Minutes to hours | N/A |
| Amino Acids | 35 | N/A |
| Typical Dose | 0.01-1 nmol intrathecal|1-100 nM in vitro|single-dose rodent studies | 0.05-2 mg/m2 IV in early trials |
| Route | Intrathecal | Intravenous |
| Purity | ≥98% | ≥98% |
| Studies Count | 110 | 120 |
| Research Status | Pre-clinical | Clinical |
Huwentoxin-IV Benefits
- ✓Nav1.7 selectivity
- ✓pain-channel validation
- ✓action-potential research
- ✓analgesic lead optimization
Didemnin B Benefits
- ✓antineoplastic
- ✓antiviral
- ✓pro-apoptotic
- ✓immunomodulatory
Huwentoxin-IV Dosing
In vitro Nav1.7 electrophysiology|Intrathecal rodent analgesia studies|Single-bolus channel selectivity assays
Didemnin B Dosing
historic IV phase I/II oncology regimens|dose escalation in early trials|no approved dosing regimen
Huwentoxin-IV Side Effects
- ⚠Neurological impairment at high exposure
- ⚠off-target sodium-channel effects
- ⚠injection-site irritation
Didemnin B Side Effects
- ⚠nausea
- ⚠vomiting
- ⚠myelosuppression
Research Overview
Huwentoxin-IV
Studies show huwentoxin-IV can inhibit sodium-channel currents with notable selectivity, making it useful for dissecting pain-sensing neuron excitability. It is one of the better known spider-venom templates for Nav1.7-targeted drug discovery.
Didemnin B
Didemnin B showed strong cytotoxic and antiviral activity in early literature and became an important scaffold for later marine drug development. Its clinical progress was limited by toxicity, but it remains highly cited as a foundational marine depsipeptide.
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