34 results about "Haemophilia B" patented technology

The present invention aims at converting factor IX into a molecule with enhanced activity which provides an alternative for replacement therapy and gene therapy for hemophilia B. Using recombinant techniques, factor IX with replacement at positions 86, 277, and 338 exhibits better clotting activity than recombinant wild type factor IX.

The invention relates to a liquid, aqueous pharmaceutical composition comprising a Factor VII polypeptide (e.g. human Factor VIIa) and a buffering agent; wherein the molar ratio of non-complexed calcium ions (Ca²⁺) to the Factor VII polypeptide is lower than 0.5. The composition may further comprise a stabilizing agent (e.g. copper or magnesium ions, benzamidine, or guanidine), a non-ionic surfactant, a tonicity modifying agent, an antioxidant and a preservative. The composition is useful for treating a Factor VII-responsive syndrome, such as bleeding disorders, including those caused by clotting Factor deficiencies (e.g. haemophilia A, haemophilia B, coagulation Factor XI deficiency, coagulation Factor VII deficiency); by thrombocytopenia or von Willebrand's disease, or by clotting Factor inhibitors, and intra cerebral haemorrhage, or excessive bleeding from any cause. The preparations may also be administered to patients in association with surgery or other trauma or to patients receiving anticoagulant therapy.

The present invention relates to a method of treating an individual having a blood coagulation defect (e.g., hemophilia A, hemophilia B), comprising administering to the individual an effective amount of a DNA vector encoding modified Factor VII (FVII), wherein the modified Factor VII leads to generation of Factor VIIa in vivo. In a particular embodiment, the invention pertains to a method of treating an individual having a blood coagulation defect comprising administering to the individual an effective amount of a nucleic acid encoding a modified FVII wherein the modified FVII comprises a signal which codes for precursor cleavage by furin at the activation cleavage site of the modified FVII. The invention also relates to a method of treating an individual having a blood coagulation disorder comprising administering to the individual an effective amount of a nucleic acid encoding the light chain of human FVII and a nucleic acid encoding the heavy chain of human FVII operably linked to a leader sequence. Compositions, expression vectors and host cells comprising nucleic acid which encodes a modified Factor VII, wherein the modified Factor VII leads to generation of Factor VIIa in vivo is also encompassed by the present invention.

Protein replacement therapy for patients with hemophilia or other inherited protein deficiencies is often complicated by pathogenic antibody responses, including antibodies that neutralize the therapeutic protein or that predispose to potentially life-threatening anaphylactic reactions by formation of IgE. Using murine hemophilia B as a model, we have developed a prophylactic protocol against such responses that is non-invasive and does not include immune suppression or genetic manipulation of the patient's cells. Oral delivery of coagulation factor IX (F. IX) expressed in chloroplasts, bioencapsulated in plant cells, effectively blocked formation of inhibitory antibodies in protein replacement therapy. Inhibitor titers were mostly undetectable and up to 100-fold lower in treated mice when compared to controls. Moreover, this treatment eliminated fatal anaphylactic reactions that occurred after 4 to 6 exposures to intravenous F. IX protein. While only 20-25% of control animals survived after 6-8 F. IX doses, 90-95% of tolerized mice survived 12 injections without signs of allergy or anaphylaxis. This high-responder strain of hemophilia B mice represents the first hemophilic animal model to study anaphylactic reactions. The plant material was effective over a range of oral antigen doses (equivalent to 5-80 μg recombinant F.IX/kg), and controlled inhibitor formation and anaphylaxis long-term, up to 7 months. Oral antigen administration caused a deviant immune response that suppressed formation of IgE and inhibitory antibodies. This cost-effective and efficient approach to oral delivery of protein antigens to the gut should be applicable to several genetic diseases that are prone to pathogenic antibody responses during treatment.

The present invention relates to variants of factor IX (F.IX) or activated factor IX (F.IXa), wherein the variant is characterized in that it has clotting activity in absence of its cofactor. The present invention furthermore relates to variants of factor IX (F.IX) or activated factor IX (F.IXa), wherein the variant is characterized in that it has increased F.IX clotting activity compared to wildtype. The present invention furthermore relates to the use of these variants for the treatment and/or prophylaxis of bleeding disorders, in particular hemophilia A and/or hemophilia B or hemophilia caused or complicated by inhibitory antibodies to F.VIII. The present invention also relates to further variants of factor IX (F.IX) which have desired properties and can, thus be tailored for respective specific therapeutic applications.

The present invention relates to the use of FIXa and FVIII in the preparation of a composition for the treatment of haemophilia A or haemophilia B in a subject which does not present with anti-FVIII antibodies. The present invention further relates to a composition comprising FIXa and a composition comprising FVIII for simultaneous, simultaneous separate or sequential use in the treatment of haemophilia A or haemophilia B in a subject which does not present with anti-FVIII antibodies.

The invention relates to an adenovirus vector for gene therapy on hemophilia B and application thereof, and the adenovirus vector can simultaneously express hFIX and red fluorescent protein; both sides of a tandem gene cassette of the hFIX and the red fluorescent protein are respectively provided with a loxp site of a Cre integrase action site in the same direction, and an action site attB of site-specific integrase PhiC31 is arranged in the gene cassette. The invention obtains a recombinant adenovirus vector which can be cyclized by DNA marked by the red fluorescent protein, and lays the foundation for the recombinant adenovirus vector to be further integrated into a main genome through attb sequences to exert the lasting function for treating hemophilia B. The adenovirus vector or adenovirus particles packaged outside the adenovirus vector is applied in the treatment of hemophilia B.

The invention relates to the preparation of recombinant human coagulation factor IX and an application thereof. The recombinant hFIX protein and hFIX of human blood source have the same molecular composition and biological activity and can be eased by being used for hemophilia B mouse model. The recombinant hFIX protein can be used as a standard in the tests for clinically detecting hFIX and the like, and can also cure diseases requiring supplementing hFIX, such as hemophilia B, etc.

The invention discloses a pharmaceutical composition of hemocoagulase. The pharmaceutical composition is characterized in that the pharmaceutical composition is prepared from 0.00005 to 0.0005 percentof a hemocoagulase composition and the balance of a pharmaceutically acceptable carrier. The composition is applied to preparation of a medicine for treating Haemophilia B (coagulation factor IX deficiency). Active components in the hemocoagulase comprise hemocoagulase, i.e., a thrombin-like enzyme (batroxobin), and a phospholipid dependent coagulation factor X activating agent (FXA). A bleedingstopping process of the hemocoagulase does not depend on a coagulation factor IX and is mainly used for fibrin and an activated coagulation factor X, and has the effect of treating bleeding of the haemophilia B. After the hemocoagulase is used for treating, platelet aggregation can be remarkably enhanced, and the formation of blood clots or fibrin clots in a patient with the haemophilia B is recovered.

The invention relates to modified Factor IX polypeptides such as Factor IX polypeptides with one or more amino acid substitutions. The invention also relates to methods of making modified Factor IX polypeptides, and methods of using modified Factor IX polypeptides, for example, to treat patients afflicted with hemophilia B.

The invention deals with the gene drugs for therapy Hemophilia B and its method of preparation. It contains human source gene vector-FIX recombinant constructed using DNA sequence as leading sequence of therapy gene without important physiological function-related gene on the short arms of human group D,G chromosomes or to which DNA sequence is homologous. This invention also provides the method of preparing gene drug. The therapy gene of gene drug for hemophilia B has a high stability of expression, safety, high expression efficiency and no immunogenecity.

The present invention relates to modified Factor IX polypeptides such as Factor IX polypeptides with one or more introduced glycosylation sites. The modified Factor IX polypeptides may exhibit increased in vitro or in vivo stability such as a longer plasma half-life. The invention also relates to methods of making modified Factor IX polypeptides, and methods of using modified Factor IX polypeptides, for example, to treat patients afflicted with hemophilia B.

Provided herein, are compositions based on retroviruses (e.g., lentiviruses) comprising one or more nucleic acid molecules encoding retroviral Pol polyprotein components and a nucleic acid molecule comprising one or more transgene sequences flanked by long terminal repeat sequences, for delivery of the one or more transgenes to a target cell ex vivo or in vivo. The compositions are useful for delivering to a target cell (e.g., hematopoietic stem cells (HSCs), liver cells, ocular cells, muscle cells, epithelial cells, T cells, etc.) and/or stably expressing any transgene (e.g., beta-globin, Factor VIII, RP GTPase regulator (RPGR), dystrophin, cystic fibrosis transmembrane conductance regulator (CFTR), a chimeric antigen receptor, etc.) with a biological effect to treat and/or ameliorate the symptoms associated with any disorder related to gene expression (e.g., sickle cell disease, beta-thalassemia, haemophilia B, retinitis pigmentosa, Duchenne muscular dystrophy, cystic fibrosis, cancer, etc.).

Compositions and regimens useful in treating hemophilia B are provided. The method involves administering to the human subject via a peripheral vein by infusion of a suspension of replication deficient recombinant adeno-associated virus (rAAV).

The invention belongs to the field of gene engineering, and particularly relates to a vector for expressing a recombinant blood coagulation factor FIX and a construction method and applications thereof. Aiming at the problems of insecurity of viruses and packaging complexity of adeno-associated viruses, the invention provides a safe cell which is not integrated into a host genome, can be copied incells and is used for hemophilia gene therapy and a construction method and applications of the cell. The plasmid vector comprises an EBV gene for encoding EBV nucleoprotein EBNA-1, an oriP replication starting point of EBV, a blood coagulation factor hFIX encoding sequence and the like. The recombinant vector disclosed by the invention is a gene therapy product which introduces the blood coagulation factor into cells to treat hemophilia for the first time, and lays a foundation for the vector to further safely treat hemophilia B.

The present invention relates to the treatment of haemophilia. More specifically, the invention relates to a new method of inducing an immune tolerance against at least one blood factor used to treat haemophilia through the epicutaneous route by application of a skin patch device comprising a blood factor in order to continue haemophilia treatment. The present invention also relates to the skin patch device containing Factor VIII.

The present invention relates to the use of FIXa and FVIII in the preparation of a composition for the treatment of haemophilia A or haemophilia B in a subject which does not present with anti-FVIII antibodies. The present invention further relates to a composition comprising FIXa and a composition comprising FVIII for simultaneous, simultaneous separate or sequential use in the treatment of haemophilia A or haemophilia B in a subject which does not present with anti-FVIII antibodies.