Cobra Venom Factor
Based on 1 Customer Validation
Cobra Venom Factor (CVF) is a selective activator targeting complement components C3, C5, and factor B in the complement system. After binding to factor B, Cobra Venom Factor is cleaved by factor D, forming a stable C3/C5 convertase resistant to regulatory proteins H and I. This continuously hydrolyzes C3 and C5, depleting serum complement while inducing neutrophil migration, vascular leakage, and increased TNF-α levels. Cobra Venom Factor can be used to deplete complement and mimic complement activation-related pathological states, and is applied in animal models of complement-mediated diseases such as acute respiratory distress syndrome (ARDS), sepsis, and shock. Cobra Venom Factor can be isolated from the venom of cobras (e.g., Naja atra, Naja melanoleuca, Naja kaouthia, etc.).
For research use only. We do not sell to patients.
- Purity : 95.00%
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Storage:
Please store the product under the recommended conditions in the Certificate of Analysis.
Biological Activity
Description
In Vitro
Cobra Venom Factor (1 μM; 24 hours) incubated with human factor B, factor D, and Mg2+ activates factor B and cleaves it into Ba and Bb fragments[3].
Cobra Venom Factor incubated with guinea pig serum and guinea pig erythrocytes induces bystander hemolysis[3].
Cobra Venom Factor incubated with guinea pig serum consumes serum complement activity[3].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only. Further protocols information, click here.
Clinical Trial
| NCT Number | Sponsor | Condition | Start Date |
Phase
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|---|---|---|---|---|
| NCT01329991 | Plexxikon| | 2011-05 | PHASE1 |
Chemical Information
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Appearance Liquid
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Color Colorless to light yellow
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SMILES
[Cobra Venom Factor]
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Synonyms
CVF
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Shipping
Shipping with dry ice.
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Storage
Please store the product under the recommended conditions in the Certificate of Analysis.
Protocols
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LPS-Induced Endotoxemia/Systemic Inflammation
Lipopolysaccharide (LPS)-induced endotoxemia is a widely used in vivo model of acute systemic inflammation in which LPS, a Gram-negative bacterial endotoxin, activates innate immune signaling primarily through TLR4, leading to rapid and transient induction of pro-inflammatory cytokines such as TNF-α, IL-6, and IL-1β in circulation and tissues. This cytokine surge is commonly used as a measurable readout of systemic inflammatory activation and immune dysregulation, and is typically assessed within hours after intraperitoneal LPS administration in mouse models of endotoxemia. The model captures key features of systemic inflammatory response syndrome, including cytokine release, immune cell activation, and downstream tissue responses, and has been used to evaluate anti-inflammatory interventions such as cytokine modulation, lipid mediators, and immune cell-targeting therapies.
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Cell migration
Cell migration is a method that plays an important role in wound healing, cell differentiation, embryonic development, etc.
Purity & Documentation
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Data Sheet (265 KB)
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SDS (251 KB)
- English - EN (251 KB)
- Français - FR (251 KB)
- Deutsch - DE (251 KB)
- Norwegian - NO (251 KB)
- Español - ES (251 KB)
- Swedish - SV (251 KB)
- Italian - IT (251 KB)
- Korean - KR (251 KB)
- Portuguese - PT (251 KB)
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Handling Instructions (2659 KB)
References
[1]. Lu Z, et al. Nerve growth factor from Chinese cobra venom stimulates chondrogenic differentiation of mesenchymal stem cells. Cell Death Dis. 2017 May 18;8(5):e2801. [Content Brief]
[2]. Proctor LM, et al. Complement inhibitors selectively attenuate injury following administration of cobra venom factor to rats. Int Immunopharmacol. 2006 Aug;6(8):1224-32. [Content Brief]
[3]. Kock MA, et al. Structure and function of recombinant cobra venom factor. J Biol Chem. 2004 Jul 16;279(29):30836-43. [Content Brief]
Calculators
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)