МЕТОДОЛОГІЧНІ ПІДХОДИ ОДЕРЖАННЯ ФАКТОРА VIII ЗСІДАННЯ КРОВІ

Abstract

The article deals with basic methods used by modern technology to obtain coagulation factor VIII (FVIII).
 The blood plasma fractionation remains the only biotechnological approach to make life-saving protein therapy to treat human diseases. The biological medicines from human plasma play a vital role in the treatment of patients with different diseases. These products include a range of coagulation factors (FVIII, FIX, the prothrombin complex, Von Willebrand factor, fibrinogen etc.), immunoglobulins, protease inhibitors, anticoagulants and albumin. 
 Four plasma proteins are commercially important for production: albumin, IgG, factor VIII, and factor IX. VIII is a coagulation factor in the blood, which is missing or defective in patients with Hemophilia A. Replacement therapy with FVIII concentrates constitutes the basis for hemophilia care.
 Cryoprecipitate was described in the mid 60's of the XX century as a first concentrate of antihemophilic FVIII.The main indications for the clinical use of cryoprecipitate were hypofibrinogenemia or disfibrinogenemia. Previously, cryoprecipitate was used for treatment of hemophilia A and von Willebrand’s disease.
 Traditional FVIII production methods included deposition steps, which were aimed at elimination of protein impurities such as fibrinogen, fibronectin and immunoglobulins. These technologies could use the combination of methods at low temperatures or the addition of protein precipitating substances (PEG, polyvinylpyrrolidone, dextran, ficol, percol etc.). Using chromatographic methods in FVIII production technology allowed receiving high purity and specific activity concentrate of FVIII. Ion exchange chromatography techniques are often used in order to isolate coagulation FVIII. These techniques include methods of affinity chromatography as well as the use of monoclonal antibodies to bind of FVIII.
 Nowadays, production of plasma concentrate of FVIII is used in combination with different chromatographic techniques.