74 results about "Diphtheria vaccination" patented technology

The disclosure relates to cancer ribonucleic acid (RNA) vaccines, as well as methods of using the vaccines and compositions comprising the vaccines. In particular, the disclosure relates to concatemeric mRNA cancer vaccines encoding several cancer epitopes on a single mRNA construct, i.e. poly-epitope mRNA constructs or poly-neo-epitope constructs. The disclosure further relates to p53 and KRAS mutations, as well as incorporation of immune enhancers such as STING, e.g. mRNA constructs further encoding an immune stimulator or adjuvant. The disclosure further relates to inclusion of universal T cell epitopes, such as tetanus or diphtheria toxins to elicit an enhanced immune response.

The present application relates to compositions of modified diphtheria toxin and fusion proteins containing modified diphtheria toxin that reduce binding to vascular endothelium or vascular endothelial cells, and therefore, reduce the incidence of Vascular Leak Syndrome, as well as methods of making the compositions. The present application also relates to a polypeptide toxophore from a modified diphtheria toxin, where the modification is at least one amino acid residue at the amino acid residues 6-8, 28-30 or 289-291 of an unmodified native diphtheria toxin. Also described are fusion proteins which contain a modified diphtheria toxin and a non-diphtheria toxin fragment which contains a cell binding portion. The modified diphtheria toxins described can be used for the treatment of a malignant disease or a non-malignant disease.

Processes for preparing combination vaccines that include diphtheria and tetanus toxoids, where these two toxoids are used in the processes as a single component containing both toxoids, and also containing 1-hydroxy-2-phenoxyethane.

Immunogenic compositions, cancer vaccines and methods for treating cancer are provided. Compositions comprising: (a) a glycan such as Globo H or an immunogenic fragment thereof, wherein the glycan is conjugated with a carrier protein by a linker such as para-nitrophenyl; and (b) an adjuvant comprising glycolipid capable of binding CDId on a dendritic cell, such as an a-galactosyl-ceramide derivative, wherein the immunogenic composition induces an immune response that induces a higher relative level of IgG isotype antibodies as compared to IgM isotype antibodies, are provided. Immunogenic compositions comprising the carrier protein diphtheria toxin cross-reacting material 197 (DT-CRM 197) and the adjuvant C34 are provided. Antibodies generated by immunogenic compositions disclosed herein further neutralize at least one of the antigens Globo H, stage-specific embryonic antigen-3 (SSEA-3) and stage-specific embryonic antigen-4 (SSEA-4). Therapeutics against breast cancer stem cells comprising immunogenic compositions comprising Globo H, SSEA-3 or SSEA-4 conjugated with DT-CRM 197.

Conjugated meningococcal capsular saccharides will be introduced into immunisation schedules in the near future, but the phenomenon of “carrier suppression” must first be addressed, particularly where multiple conjugates are to be used. It has been found that diphtheria toxoid and its derivatives (such as CRM197) can safely be used as the carrier protein, even where multiple meningococcal conjugates are administered at the same time and where a patient has previously been exposed to the carrier protein, either in the form of a previous immunogen (e.g. in a DTP vaccine) or as a previous carrier protein (e.g. in a Hib or pneumococcal conjugate vaccine). The invention provides a method for immunising a patient, comprising administering multiple conjugates of meningococcal capsular saccharides, wherein each conjugate comprises a diphtheria toxoid (or derivative thereof) carrier protein, and the capsular saccharide, and wherein the patient has been pre-immunised with a diphtheria toxoid (or derivative thereof).

The invention relates to a process for improving the purity of diphtheria toxin. The manufacture process comprises the following steps of solid culture medium transfer, culture in a liquid culture medium fermentor, removal of thalli by centrifugation, primary salting-out, secondary salting-out, ultrafiltration desalting, gel filtration, aseptic filtration, removal of toxin, detection and storage stock solution, preparation of semi-finished products, finished products, wherein the liquid culture medium in the liquid culture medium fermentor is treated to remove proteins with the molecular weight of more than 50,000, and the culture products are almost diphtheria toxin with the molecular weight of more than 50,000; and by salting out and gel filtration, the proteins and other impurity proteins of which the molecular weight is less than 50,000 in the liquid product are further removed, so that the diphtheria toxin with high purity is obtained.

A multi-component immunogenic composition confers protection on an immunized host against infection caused by Haemophilus influenzae. Such composition comprises at least three different antigens of Haemophilus influenzae, two of which are adhesins. High molecular weight (HMW) proteins and Haemophilus influenzae adhesin (Hia) proteins of non-typeable Haemophilus influenzae comprise the adhesin components while the other antigen is a non-proteolytic analog of Hin47 protein. Each component does not impair the immunogenicity of the others. The Haemophilus vaccine may be combined with DTP component vaccines, which may contain inactivated poliovirus, including type 1, type 2 and/or type 3, and/or a conjugate of a capsular polysaccharide of Haemophilus influenzae and tetanus or diphtheria toxoid, including PRP-T, to provide a multi-valent component vaccine without impairment of the immunogenic properties of the other antigens.

Belonging to the technical field of biology, the invention in particular relates to a pastevula mulfocida capsular polysaccharide-protein conjugate vaccine and a preparation method thereof. The pastevula mulfocida capsular polysaccharide-protein conjugate vaccine provided by the invention is formed by connection of pastevula mulfocida capsular polysaccharide and diphtheria toxoid carrier protein through nano-microspheres. The combination of pastevula mulfocida capsular polysaccharide with the carrier protein diphtheria toxoid enhances the immune efficacy of the vaccine, and also reaches a cross protection effect on the infection of homologous strains and heterologous strains. The preparation method of the pastevula mulfocida capsular polysaccharide-protein conjugate vaccine provided by theinvention has the characteristics of simple operation and cost saving, and has good application prospect.

The invention discloses an acellular pertussis combined vaccine and a preparation method thereof and belongs to the technical field of production and preparation of vaccines. The acellular pertussis combined vaccine is prepared from the following raw material components: 5-40Mu g of pertussis toxin, 5-40Mu g of filamentous hemagglutinin, 2-10Mu g of pertussis adhesin, 10-25lf of diphtheria toxoid, 4-10lf of tetanus toxoid, 1.0-2.0mg/ml of aluminium hydroxide and 7.5-9.5g/L of sodium chloride. The preparation method of the acellular pertussis combined vaccine comprises the following steps: preparing monovalent vaccine original fluids, mixing and diluting. The acellular pertussis combined vaccine is clear and definite in ingredients, quality control can be easily realized, the side effect is small, and the safety is high; and the preparation method of the acellular pertussis combined vaccine is simple to operate, convenient in preparation and low in cost, so that the acellular pertussis combined vaccine is applicable to industrial mass production.

The invention provides a preparation method of a diphtheria vaccine and aims at solving the problems of long production period of the diphtheria vaccine, ammonium sulfate pollution generated in production process, excessive impurity protein in the final product and over-large side reaction of the product in the prior art. The preparation method of the diphtheria vaccine is characterized by comprising the following steps of 1) carrying out resuscitation and fermentation cultivation of a corynebacterium diphtheriae strain, thereby preparing a diphtheria bacterial solution; 2) centrifuging the diphtheria bacterial solution, carrying out triple filtration treatment, and then carrying out ultrafiltration concentration, and dialysis and elution, thereby obtaining a diphtheria toxin; 3) detoxifying the diphtheria toxin, and then carrying out ultrafiltration concentration, and dialysis and elution by use of a tangential flow ultrafiltration system; 4) purifying the detoxified diphtheria toxin. High-speed centrifuging is used for removing bacteria, and ultrafiltration concentration and elution are used instead of adsorption by use of active carbon and salting out by use of ammonium sulfate, and the whole experimental steps can be finished by only one day, and therefore, the process steps are simplified, the production period is shortened, the production efficiency is improved and the controllability of the operation steps is improved.

This invention discloses fusion protein of diphtherin and GM-CSF, its coding gene, and its application. The fusion protein is selected from: (a) the protein shown in SEQ ID No.2; (b) the protein derived from SEQ ID No.2 by substituting, deleting and/or adding one or more amino acid residues, which can kill acute myeloid leukemia cells. The fusion protein can kill target cells, and has a high expression level.

Methods for producing quadrivalent meningococcal meningitis polysaccharide and conjugate vaccines for serotypes A, C, Y and W-135 disclosed. Neisseria meningitidis fastidious medium was designed to maximize the yield of capsular polysaccharides and generate minimal cellular biomass and endotoxin in a short duration of fermentation. The crude polysaccharides are isolated, purified, and mechanically depolymerized by sonication. These purified polysaccharides were found in human clinical trials to be safe and immunogenic against meningococcal disease caused by N. meningitidis A, C, Y and W-135 serogroups in sub-Saharan Africa. In the preferred embodiment, the polysaccharides are conjugated to carrier proteins of diphtheria or tetanus toxiod to an average molecular size of 5100 to 9900 Daltons and provide broad spectrum protection to humans of all ages. Accelerated polysaccharide production and the efficacy of the resulting vaccine are demonstrated.

Provided is a method of treating an immune system disorder not involving T cell proliferation, comprising administering to the animal an immunotoxin comprising a mutant diphtheria toxin moiety linked to an antibody moiety which routes by the anti-CD3 pathway, or derivatives thereof under conditions such that the disorder is treated. Thus, the present method can treat graft-versus-host disease. Also provided is a method of inhibiting a rejection response by inducing immune tolerance in a recipient to a foreign mammalian donor tissue or cells, comprising the steps of: a) exposing the recipient to an immunotoxin so as to reduce the recipients's peripheral blood T-cell lymphocyte population by at least 80%, wherein the immunotoxin is anti-CD3 antibody linked to a diphtheria protein toxin, wherein the protein has a binding site mutation; and b) transplanting the donor cells into the recipient, whereby a rejection response by the recipient to the donor organ cell is inhibited, and the host is tolerized to the donor cell.

The present invention relates to the field of vaccines for protecting against polio, and in particular to combination vaccines for protecting against polio, diphtheria, tetanus, and pertussis diseases. Specifically, vaccines comprising reduced dose inactivated poliovirus (IPV) is provided, which can maintain an adequate or improved level of protection against polio.

The invention discloses a traditional Chinese medicine air disinfectant for a clinical laboratory and a preparation method thereof, and belongs to the field of traditional Chinese medicine. The medicine effective components of the air disinfectant comprise the following raw materials: pyrola calliantha, folium mori, haliotidis concha, eupatorium fortune, pyrrosia lingua, dendranthema indicum, gentiana scabra, glycyrrhiza uralensis, achyranthes aspera, dark plum, plantago asiatica, fructus forsythia, adina pilulifera, agastache rugosa, rhus chinensis, atractylodes rhizome, folium artemisiae argyi, platycladus orientalis, coriandrum sativum, piper longum, cortex moutan radicis, rubia cordifolia, rosmarinus officinalis and aristolochia debilis. The air disinfectant belongs to a pure traditional Chinese medicine material preparation, is poisonless and harmless, has obvious bacteriostatic or bactericidal effect on staphylococcus aureus, pneumococcus, mycobacterium tuberculosis, typhoid bacillus, corynebacterium diphtheria, escherichia coli and pseudomonas aeruginosa, has a certain inhibiting effect on other pathogenic bacteria, influenza virus and fungi, is good in sterilization effect,does not have stimulation for human body, does not have extraneous odor and has vegetation fragrance, can perform refreshment and purify and refresh the air, and does not affect the normal work of inspection personnel after sterilization.

The invention discloses a traditional Chinese medicine for treating diphtheria, belonging to the technical field of medicaments. Gypsum, rhizoma anemarrhenae, fritillaria thunbergii, radix isatidis, subprostrate sophora, viola yedoensis, honeysuckle, dried rhizome of rehmannia, radix scrophulariae, forsythia, ophiopogon japonicus, radix paeoniae alba, cortex moutan, mint, liquorice and fresh olive are used as raw materials; and the raw materials are prepared according to different characteristics and different proportioning of each traditional Chinese medicine. The traditional Chinese medicine has unique prescription, is used for treating the diphtheria with obvious effect, and has simple and convenient processing and preparation and convenient taking.

The invention discloses a preparation method of a traditional Chinese medicine spray, and in particular relates to a preparation method of a traditional Chinese medicine spray related with traditional Chinese medicine. The traditional Chinese medicine spray provided by the invention comprises the following traditional Chinese medicine raw materials of eupatorium, Agastache rugosus, rhizoma atractylodis, Mangnolia officinalis, radix sophorae flavescentis and folium artemisiae argyi at the weight ratio of 10 to 10 to 20 to 10 to 20 to 7. The medicine liquid prepared by the invention is capable of effectively killing and restraining multiple viruses such as a common cold virus, a staphylococcus, a streptococcus, a dysentery bacillus, a Bacillus anthraci, alpha-streptococcus hemolyticus, a corynebacterium diphtheria, a lung class diplococcus, staphylococcus aureus; the use is safe, the smell is fragrance, the medicine liquid is harm for a human body, and does not corrode an article.