96 results about "Passive immunity" patented technology

A prophylactic regimen for passively preventing infection with a pathogen which has a typical route of infection through the nasopharynx region of a subject, e.g., an airborne virus typically transmitted through coughing or sneezing. The method involves specifically targeting a subject's nasopharynx with a viral vector comprising an AAV capsid and carrying a nucleic acid sequence encoding an anti-viral neutralizing antibody construct operably linked to expression control sequences, in order to provide for high levels of expression of the anti-viral neutralizing antibody construct in the nasal airway cells. Optionally, the neutralizing antibody construct is expressed under a promoter which is regulated or induced by a small molecule which is delivered separately from the viral vector. In one embodiment, the method permits transfection of a subject's nasopharynx even where the subject has circulating neutralizing antibodies against the AAV capsid.

The invention relates to bacterial choline binding proteins (CBPs) which bind choline. Such proteins are particularly desirable for vaccines against appropriate strains of Gram positive bacteria, particularly streptococcus, and more particularly pneumococcus. Also provided are DNA sequences encoding the bacterial choline binding proteins or fragment thereof, antibodies to the bacterial choline binding proteins, pharmaceutical compositions comprising the bacterial choline binding proteins, antibodies to the bacterial choline binding proteins suitable for use in passive immunization, and small molecule inhibitors of choline binding protein mediated adhesion. Methods for diagnosing the presence of the bacterial choline binding protein, or of the bacteria, are also provided. In a specific embodiment, a streptococcal choline binding protein is an enolase, which demonstrates strong affinity for fibronectin.

IgG and IgM autoantibody levels against phosphorylcholine in subjects with hypertension (diastolic pressure>95 mmHg) were determined at baseline in order to determine the importance of antibodies for the development of atherosclerosis. The results show that increases in intima-media thickness (IMT) at a follow-up four years after baseline were significantly less prevalent in subjects having high IgM autoantibodies to phosphorylcholine. The presence or absence of IgM autoantibodies against phosphorylcholine is thus related to an increased or decreased risk of developing ischemic cardiovascular diseases. A method to determine IgM antibodies toward phosphorylcholine is proposed in this invention to identify subjects at risk of developing ischemic cardiovascular diseases. Animal experiments show that medium to high levels of IgM antibodies can be detected in plasma after active immunization with a keyhole limpet hemocyanin (KLH)-phosphorylcholine conjugate. A pharmaceutical composition comprising a phosphorylcholine conjugate (active immunization) or a monoclonal antibody with specificity to a phosphorylcholine conjugate (passive immunization) is proposed and the use of these compositions as active or passive immunogens in the treatment or prevention of atherosclerosis.

Embodiments concern methods and compositions for treating or preventing a bacterial infection, particularly infection by a Staphylococcus bacterium. Aspects include methods and compositions for providing a passive immune response against the bacteria. In certain embodiments, the methods and compositions involve an antibody that binds Staphylococcal protein A (SpA).

The present invention relates to novel methods for combating cell degeneration or dysfunction resulting from neuroinflammatory conditions. The invention especially relates to the use, in the preparation of a medicament for the treatment of neurodegenerative disease associated with neuroinflammation, of an immunogenic compound which is capable of inducing an immune response against a proapoptotic neurotrophin, or an effective amount of a hapten combined with appropriate carriers and/or adjuvants to render the resulting combination capable of inducing an immune response against a proapoptotic neurotrophin. Also disclosed are compositions for the active or passive immunization against neuronal or glial cell apoptosis caused by neuroinflammation as well as methods and means useful for said active or passive immunization.

Polynucleotide sequences are provided for the diagnosis of the presence of retroviral infection in a human host associated with lymphadenopathy syndrome and/or acquired immune deficiency syndrome, for expression of polypeptides and use of the polypeptides to prepare antibodies, where both the polypeptides and antibodies may be employed as diagnostic reagents or in therapy, e.g., vaccines and passive immunization. The sequences provide detection of the viral infectious agents associated with the indicated syndromes and can be used for expression of antigenic polypeptides.

New conjugates comprising fragments of amyloid proteins, which may be used in vaccines for the treatment, prevention and/or amelioration of diseases associated with deposition of amyloid proteins, such as, e.g. Alzheimers disease. Methods for treating, preventing and/or ameliorating amyloid-related diseases, by administering a conjugate comprising fragments of an amyloid protein to a subject in need thereof, thereby enabling the production of antibodies in the subject. Antibodies—being capable of interacting with pathological regions within an amyloid protein, and thereby preventing e.g. the formation of amyloid fibrils, plaques and/or deposits, and methods for passive immunization wherein an antibody as described above is administered to a subject in need thereof. Furthermore is provided specific fragments of the C-terminal part of amyloid beta (1-42), that when administered to a mammal generates antibodies, which specifically targets the soluble form of the highly amyloidogenic amyloid beta (1-42).

A composition is provided to prevent, limit the effects of, delay the onset of, or treat one or more of the causes, symptoms or complications of gestational hypertension, preeclampsia, eclampsia and/or intrauterine growth restriction. The composition comprises a therapeutically effective amount of an antibody that reacts immunologically with or binds digoxin and has a high dose of digoxin binding capacity as the active ingredient. There is also provided a method of preventing, limiting the effects of, delaying the onset of, or treating a cause, symptom or complication of gestational hypertension, preeclampsia, eclampsia or intrauterine growth restriction, comprising the step of administering to a mammal a composition comprising a therapeutically effective amount of an antibody that reacts immunologically with or binds digoxin and has a high dose of digoxin binding capacity.

The invention discloses a preparation method and application of Newcastle disease virus infected immune complex vaccines. The preparation method comprises the following steps of: (1) preparing antigens and inactivated vaccines by using Newcastle disease virus Shanghai strains as seed viruses; (2) transferring antibodies in chicken blood serum to yolk to form yolk antibodies IgY; and (3) mixing the prepared inactivated vaccines and the yolk antibodies IgY in equal volume, and hatching to obtain the immune complex vaccines. By combining passive immune (vaccine) and active immune (specific antibody) measures, animals are protected from the infection of pathogenic microbes in time for a long time.

Disclosed are the dbp gene and dbp-derived nucleic acid segments from Borrelia burgdorferi, the etiological agent of Lyme disease, and DNA segments encoding dbp from related borrelias. Also disclosed are decorin binding protein compositions and methods of use. The DBP protein and antigenic epitopes derived therefrom are contemplated for use in the treatment of pathological Borrelia infections, and in particular, for use in the prevention of bacterial adhesion to decorin. DNA segments encoding these proteins and anti-(decorin binding protein) antibodies will also be of use in various screening, diagnostic and therapeutic applications including active and passive immunization and methods for the prevention of Borrelia colonization in an animal. These DNA segments and the peptides derived therefrom are contemplated for use in the preparation of vaccines and, also, for use as carrier proteins in vaccine formulations, and in the formulation of compositions for use in the prevention of Lyme disease.

The present invention concerns methods and compositions for treating or preventing a bacterial infection, particularly infection by a Staphylococcus bacterium. The invention provides methods and compositions for providing a passive immune response against the bacteria. In certain embodiments, the methods and compositions involve an antibody, such as a recombinant antibody, that binds IsdA and/or IsdB polypeptides.

The invention discloses a completely humanized neutralizing antibody for anti-rabies viruses. The amino acid sequence of a heavy chain of the antibody is shown in sequence table SEQ ID NO1, the amino acid sequence of a light chain of the antibody is shown in sequence table SEQ ID NO5, the complementary determining region (CDR) of a variable region of the heavy chain of the antibody is shown as follows: CDR1: SEQIDNO2, CDR2:SEQIDNO3 and CDR3: SEQIDNO4, and the complementary determining region (CDR) of a variable region of the light chain of the antibody is shown as follows: CDR1:SEQIDNO6, CDR2:SEQIDNO7, and CDR3: SEQIDNO8. The beneficial effects of the completely humanized neutralizing antibody are that: the completely humanized neutralizing antibody disclosed by the invention ahs the advantages of being completely humanized, good in specificity, high in affinity, good in neutralizing effect, and low in price, can be used as a biological engineering antibody drug to quickly establish immune protection force against rabies virus, can be used for passive immunotherapy of acute infection, and also can be used for preparing detection reagents for detecting the rabies virus, finding effective neutralization antigen epitope and developing recombinant proteins and subunit vaccines for the rabies virus.

The present invention relates to a streptococcus antigen C5a and a preparation method thereof. The streptococcus protective antigen C5a is an SEZC5a recombinant protein, which consists of 571 amino acids and has a molecular weight of 60.3kDa; a forward primer has one BamHI restriction enzyme cutting site, and a reverse primer has one EcoRI restriction enzyme cutting site. According to the preparation method of the streptococcus protective antigen C5a, the SEZ C5a recombinant protein is treated with cloning, expression and purification; and a series of biological engineering technologies and experiments on mice are applied to conduct system analysis on an rSCPZ. After vaccination, the rSCPZ can provide high protective efficacy; an anti-rSCPZ mice double-immunized serum has significant passive immune protection on mice; and the mice immunized by the rSCPZ show high level of antibody titer in serum. The anti-rSCPZ antibody can induce high level of bactericidal capability; an scpZ gene has a transcription level in SEZ (Streptococcus zooepidemicus) infected mice higher than that of culture in vitro; and the rSCPZ can adhere to hep-2 cells and inhibit cell infection ability of SEZ.

The invention aims at providing a rabies virus resistant neutralizing antibody, and particularly provides a humanized or completely humanized monoclonal antibody to meet the requirement for clinically diagnosing and/or treating rabies. A phage antibody library is prepared by adopting a phage antibody library technology and taking 32 parts of high-potency healthy human peripheral blood inoculated with rabies vaccines as a raw material; 7 ELISA positive antibodies are obtained through three rounds of screening from the phage antibody library; and furthermore, the neutralizing activity of the 7 ELISA positive antibodies is measured through an RFFIT method, wherein four ELISA positive antibodies, namely R5, R7, R8 and R9, have higher neutralizing activity in all. The rabies virus resistant neutralizing antibody with high affinity, which is provided by the invention, can be used for substituting ERIG and HRIG to carry out active and/or passive immune therapy on rabies virus seriously-exposed persons.

The present invention relates to immunomodulatory compositions comprising mammalian colostrum-derived immunoglobulin preparation and optionally further colostrums, milk or milk product component/s and any adjuvants for treating immune-related disorders. More specifically, the invention provides compositions comprising colostrum-derived anti-insulin immunoglobulin preparations for the treatment of Metabolic Syndrome. The invention further provides methods and uses of the immunomodulatory compositions for an active or passive immunization in a disease-antigen specific or non specific manner.

Compositions and methods useful in modulating the innate and adaptive immune systems in a subject, including activation of natural killer (NK) cells and/or CD8+ cytotoxic T lymphocytes. The method typically comprises: administering to the subject a composition comprising a therapeutic peptide or a multivalent structured polypeptide comprising multiple copies of the therapeutic peptide described herein in an amount sufficient to increase activity of NK cells and/or CD8+ cytotoxic T lymphocytes in the subject. Preferred therapeutic compositions comprise a carrier; at least one agent selected from the group consisting of: an anti-inflammatory agent, a cytotoxic T cell proliferation agent, or a NK cell proliferation agent; and a therapeutic peptide or a multivalent structured polypeptides of the invention. In certain embodiments, the composition further comprises an immunoglobulin admixed therewith in an amount sufficient to enhance passive immunoprotection in the subject. In other embodiments, the compositions are administered in a therapeutically effective amount to a subject in need thereof to treat rheumatoid arthritis.

The invention relates to the treatment and/or prevention of cancerous and/or, precancerous conditions of the liver, lung and esophagus by actively and/or passively immunizing a patient against the peptide hormone gastrin and/or a gastrin receptor, e.g., the CCK-B/gastrin receptor. The immunizations of the invention may be employed as a monotherapy, an adjunctive therapy, or as part of a combination therapy.

The invention provides streptococcus protective antigen SAP and a preparation method thereof. The antigen SAP is SAP recombination protein of SEZ. The preparation method comprises the following steps: firstly obtaining a target gene through a PCR technology, connecting the target gene to a carrier and converting escherichia coli, and performing purification on an expression product induced by escherichia coli, so as to finally obtain target recombination protein. The streptococcus protective antigen SAP has high conservatism, vaccine prepared from the protein is high in specificity, a series of bioengineering technologies and mouse experimental analysis prove that the SAP can provide higher protective efficacy after immunization, anti-SAP mice second immune serum has obvious passive immune protection to mice, and high-level antibody titer is expressed in mice serum of the SAP after immunization. The transcriptional level of SAP gene in mice body infected by SEZ is higher than that of SAP gene cultured in vitro, and an SAP antibody can induce high-level bactericidal ability.

Antibodies and molecules derived therefrom that bind to 58P1D12 protein and variants thereof, are described wherein 58P1D12 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, 58P1D12 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The 58P1D12 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 58P1D12 can be used in active or passive immunization.