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| Primary information |
|---|
| ID | 10742 |
| Therapeutic ID | Th1171 |
| Protein Name | C1 Esterase Inhibitor (Human) |
| Sequence | NA
|
| Molecular Weight | 68000 |
| Chemical Formula | NA |
| Isoelectric Point | NA |
| Hydrophobicity | NA |
| Melting point | NA |
| Half-life | Following intravenous administration of a single dose, the half-life was 56 ± 36 hours.3 Subcutaneous administration produces a half-life of 199.6 hours |
| Description | Recombinant human C1 esterase inhibitor is a human protein developed through Pharming’s proprietary technology where the human protein is expressed in milk of transgenic rabbits. Hereditary Angioedema (HAE) is a human genetic disorder caused by a shortage of C1 inhibitor activity and results in an overreaction of the immune system. The disease is characterized by acute attacks of painful and in some cases fatal swelling of several soft tissues (edema), which may last up to five days when untreated. |
| Indication/Disease | For routine prophylaxis against angioedema attacks in adolescent and adult patients with Hereditary Angioedema (HAE). |
| Pharmacodynamics | In clinical studies, intravenous administration demonstrated an increase in plasma levels of C1 inhibitor within approximately one hour or less of administration. |
| Mechanism of Action | C1 inhibitor is a normal constituent of human blood and is one of the serine proteinase inhibitors (serpins). The primary function of C1 inhibitor is to regulate the activation of the complement and intrinsic coagulation (contact system) pathway. C1 inhibitor also regulates the fibrinolytic system. Regulation of these systems is performed through the formation of complexes between the proteinases and the inhibitor, resulting in inactivation of both and consumption of the C1 inhibitor. HAE patients have low levels of endogenous or functional C1 inhibitor. Although the events that induce attacks of angioedema in HAE patients are not well defined, it is thought by some that increased vascular permeability and the clinical manifestation of HAE attacks are primarily mediated through contact system activation. Suppression of contact system activation by C1 inhibitor through the inactivation of plasma kallikrein and factor XIIa is thought to modulate this vascular permeability by preventing the generation of bradykinin1. Administration of C1 Esterase Inhibitor increases plasma levels of C1 inhibitor activity. |
| Toxicity | NA |
| Metabolism | NA |
| Absorption | NA |
| NA |
| Clearance | NA |
| Categories | NA |
| Patents Number | NA |
| Date of Issue | NA |
| Date of Expiry | NA |
| Drug Interaction | Cyproterone acetate may increase the thrombogenic activities of C1 Esterase Inhibitor (Human); Danazol may increase the thrombogenic activities of C1 Esterase Inhibitor (Human); Desogestrel may increase the thrombogenic activities of C1 Esterase Inhibitor (Human); Dienogest may increase the thrombogenic activities of C1 Esterase Inhibitor (Human); Drospirenone may increase the thrombogenic activities of C1 Esterase Inhibitor (Human); Estradiol may increase the thrombogenic activities of C1 Esterase Inhibitor (Human); Estropipate may increase the thrombogenic activities of C1 Esterase Inhibitor (Human); Ethinyl Estradiol may increase the thrombogenic activities of C1 Esterase Inhibitor (Human); Ethynodiol may increase the thrombogenic activities of C1 Esterase Inhibitor (Human); Etonogestrel may increase the thrombogenic activities of C1 Esterase Inhibitor (Human). |
| Target | Plasma protease C1 inhibitor |
| Brand Name | NA |
| Company | NA |
| Brand Description | NA |
| Prescribed For | NA |
| Chemical Name | NA |
| Formulation | NA |
| Physical Appearance | NA |
| Route of Administration | NA |
| Recommended Dosage | NA |
| Contraindication | NA |
| Side Effects | NA |
| Useful Link 1 | NA |
| Useful Link 2 | NA |
| Remarks | NA |