94581
Hirudin recombinant from yeast
lyophilized powder, white, >1500 U/vial
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About This Item
biological source
synthetic
yeast (Pichia pastoris)
Quality Level
form
lyophilized powder
specific activity
>1500 U/vial
mol wt
Mr ~6963.5
color
white
solubility
0.1 M Tris, 0.2 M NaCl, pH 8.4: 1 vial/mL, clear, colorless
storage temp.
−20°C
Application
Recombinant hirudin from yeast has been used in mannan-binding lectin serine protease 2 (MASP2) activation assay. It has also been used in pre-treating the nanosheets in phosphate buffered saline (PBS) for platelet adhesion assay.
Biochem/physiol Actions
Recombinant hirudin appears to be antigenic. Independent studies have found that 50-70% of patients treated for several days with recombinant hirudin develop at least one hirudin antibody isotype. The antibodies reduce the anticoagulant effect of hirudin, but prolong its plasma half-life by reducing renal filtration.
The anticoagulant, hirudin, is the most potent natural inhibitor of both soluble and clot-bound thrombin. It binds thrombin with high affinity, covering more than 20% of its surface area and occluding both the active site and exosite I (fibrinogen and PAR recognition site). Hirudin blocks thrombus growth and platelet activation. It is not metabolized in the bloodstream of humans and is eliminated unchanged via kidney filtration.
Unit Definition
1 U corresponds to 1 ATU (antithrombin unit; 1 ATU is defined as the amount of inhibitor that neutralizes 1 NIH unit of thrombin).
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
Regulatory Information
常规特殊物品
Certificates of Analysis (COA)
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A few immobilized thrombins are sufficient for platelet spreading
Okamura Y, et al.
Biophysical Journal, 100(8), 1855-1863 (2011)
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Carroll MV, et al.
Molecular Immunology, 46(16), 3367-3378 (2009)
Volker Liebe et al.
Seminars in thrombosis and hemostasis, 28(5), 483-490 (2002-11-07)
This article provides an overview of the clinically relevant characteristics of antibodies directed toward recombinant (r) hirudin, with emphasis on the different ways in which these antibodies may influence pharmacokinetics and pharmacodynamics of r-hirudin. A high incidence of anti-hirudin antibody
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