53 results about "Diptheria toxoid" patented technology

The present invention is in the field of pneumococcal capsular saccharide conjugate vaccines. Specifically, a multivalent Streptococcus pneumoniae immunogenic composition is provided with various conjugated capsular saccharides from different S. pneumoniae serotypes conjugated to 2 or more different carrier proteins, where the composition comprises serotype 19F capsular saccharide conjugated to diphtheria toxoid (DT) or CRM197, optionally wherein 19F is the only saccharide in the composition conjugated to diphtheria toxoid (DT) or CRM197.

A multi-component vaccine composition is described comprising acellular pertussis vaccine components, diphtheria toxoid, tetanus toxoid and inactivated poliovirus. The composition also may contain a conjugate of a capsular polysaccharide on Haemophilus influenzae type b and tetanus toxoid or diphtheria toxoid, which may be reconstituted from a lyophilized state by the other component. The administration of the multiple component vaccine resulted in no diminution of the immunogenicity of any component as a result of interference by other components of the vaccine.

The invention discloses a combined vaccine and a preparation method thereof. The combined vaccine is formed by a component A and a component B, wherein the component A is a liquid preparation and composed of pertussis toxin, filamentous hemagglutinin, pertussis adhesion, diphtheria toxoid, tetanus toxoid, aluminium hydroxide and sodium chloride; the component B is a freeze-drying preparation and composed of A-group meningitis polysaccharide conjugate, C-group meningitis polysaccharide conjugate, b-type haemophilus influenzae polysaccharide conjugate and lactose. The preparation method of the vaccine includes the steps of preparing of acellular pertussis-diphtheria-tetanus vaccine semi-finished products, A-group and C-group meningococcocci and b-type haemophilus influenzae combined vaccine semi-finished products, split charging and packaging. The vaccine has the characteristics of being safe, effective, controllable and capable of preventing diseases through an injection, the preparation method is easy to operate, preparation is facilitated, cost is low, and the combined vaccine is suitable for industrialized mass production.

The present invention is pneumococus polysaccharide protein coupling vaccine comprising covalently connected pneumococus capsule polysaccharide and recombinant pneumolysin without hemolytic activity modification and its preparation process. The vaccine has pneumolysin without hemolytic activity as protein carrier, no need of eliminating hemolysis toxicity of pneumolysin with formalin and ensured safety, and may be used for infant below 2 yeas old to prevent tympanitis. Owing to the pneumolysin as the self protein, the vaccine has no probable immune interference reaction and strengthened immune protecting effect. The vaccine has cross immunizing protection effect on various kinds of serum type pneumococus and raised immune memory response to pneumococus infection.

The invention provides a multivalent immunogenic composition containing enterovirus antigens. The composition comprises inactivated EV71 antigens and/or inactivated CA16 antigens, and inactivated polio antigens. The composition can further comprise antigens selected from hepatitis A antigens, hepatitis B antigens, acellular pertussis antigens, tetanus toxoid, diphtheria toxoid, Haemophilus influenzae type b capsular polysaccharide, and meningococcal polysaccharide antigens, as well as physiologically acceptable carriers combined with bacterial polysaccharide antigens. The invention also provides a preparation method of the composition. The composition can prevent invasion of a plurality of pathogens simultaneously without interference among the antigens, and the immunogenicity is no less than that of individually activated antigens. With the composition, vaccination processes are significantly simplified, and the vaccination efficiency is improved with reduced costs.

The present invention relates to a fermentation medium for cultivating Corynebacterium diphtheriae. The present invention also relates to the use of the fermentation medium in processes for obtaining diphtheria toxin from the Corynebacterium diphtheriae bacteria being cultivated and the preparation of vaccines using the diphtheria toxin obtained in the processes. The present invention further relates to a purification and detoxification processes specifically adapted for preparing a diphtheria toxoid for inclusion into a vaccine.

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.

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 present invention relates to immunogenic compositions comprising a conjugate of a saccharide from Streptococcus pneumoniae serotype 8 and a carrier protein, and a mixture consisting of capsular polysaccharides from Streptococcus pneumoniae serotypes 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F individually conjugated to CRM₁₉₇ carrier protein, or a mixture consisting of capsular polysaccharides from Streptococcus pneumoniae serotypes 1, 4, 5, 6B, 7F, 9V, 14, 18C, 19F and 23F individually conjugated to a carrier protein, wherein the capsular polysaccharides from Streptococcus pneumoniae serotypes 1, 4, 5, 6B, 7F, 9V, 14, and 23F are individually conjugated to protein D, the capsular polysaccharide from Streptococcus pneumoniae serotype 18C is conjugated to tetanus toxoid and the capsular polysaccharide from Streptococcus pneumoniae serotype 19F is conjugated to diphtheria toxoid. Said compositions are useful for the prevention and/or treatment of diseases caused by Streptococcus pneumoniae.

The invention discloses a preparation method of a type B haemophilus influenzae capsular polysaccharide. The preparation method comprises the steps of fermentation culture, sterilization and precipitation, polysaccharide extraction and purification, polysaccharide derivatization and polysaccharide protein conjugate preparation. The invention further discloses a multivalent combined vaccine which is prepared through the steps that an acellular pertussis stock solution, refined diphtheria toxoid and refined tetanus toxoid are added into aluminum hydroxide to be adsorbed and then added into a type B haemophilus influenzae capsular polysaccharide stock solution, and the mixed solution is diluted with normal saline. According to the preparation method, the prior art is optimized, and the high-purity low-impurity-content type B haemophilus influenzae capsular polysaccharide can be obtained; meanwhile, the type B haemophilus influenzae capsular polysaccharide is combined with multiple component vaccines to form the multivalent vaccine, the multivalent vaccine can be immune to multiple diseases simultaneously, the inoculating times are decreased, the medical risk is reduced, and the better immune effect can be obtained through one-time inoculating.

The invention discloses a corynebacterium diphtheriae culture medium. The corynebacterium diphtheriae culture medium consists of a basic culture medium, an I liquid and an II liquid, wherein the basic culture medium consists of the materials of HyPep5630, Amisoy, Na2HPO4.12H2O, lactic acid, yeast powder and calcium chloride; the I liquid is L-cystine solution; the II liquid consists of the materials of magnesium sulfate, beta-alanine, niacin, pimelic acid, copper sulfate pentahydrate, zinc sulfate heptahydrate and manganese chloride tetrahydrate. The method for preparing diphtheria toxoid by applying the corynebacterium diphtheriae culture medium is culture enabling, two-generation culturing, three-generation culturing, four-generation culturing and fermentation tank culturing. The culture medium is the animal-free culture medium; good culture recovery and multiplication culture are carried out during culture passage; and the toxin production can also reach the requirement of the existing pharmacopoeia criterion. The method for preparing the diphtheria toxoid by using the culture medium has the advantages of being simple to operate, convenient to produce, easy in taking of materials and low in cost.

The invention discloses a method for monitoring tetanus toxoid or diphtheria toxoid. The method comprises the following steps of: (1) carrying out enzymolysis of a standard substance; (2) carrying outsolid-phase extraction to enrich a target peptide fragment; (3) performing high performance liquid chromatography tandem mass spectrometry analysis; (4) drawing a standard characteristic peptide fragment table to obtain relative response intensity of each characteristic peptide fragment of a standard variety; (5) detecting a sample, and calculating to obtain the relative response intensity and arecovery rate of each characteristic peptide fragment in the sample; and (6) evaluating the detoxification effect according to the number of peptide fragments with good characteristic peptide fragmentrecovery rate. According to the monitoring method of the invention, the method for quantitatively monitoring the process stability of tetanus toxoid and diphtheria toxoid is implemented for the firsttime, the problem that a formaldehyde detoxification protein process lacks a monitoring method is solved, effective quantitative data is provided for production optimization of tetanus vaccine, tetanus-diphtheria bivalent vaccine, pertussis-diphtheria-tetanus triple vaccine, pentavaccine and proteoglycan protein conjugate vaccine and research and development of novel proteoglycan protein conjugate vaccine, and the vaccine quality improvement process and new product research and development are accelerated.

An immunogenic composition comprising of Diphtheria toxoid antigen (D), tetanus toxoid (T) antigen, Hepatitis B surface antigen (HBsAg), inactivated whole-cell B. pertussis (wP) antigen, Haemophilus influenzae type B (Hib) capsular saccharide conjugated to a carrier protein, Inactivated Polio Virus (IPV) antigen and additionally one or more antigens and the method of preparing the same. A fully liquid combination vaccine, showing improved immunogenicity, reduced reactogenicity and improved stability. Improved methods of formaldehyde inactivation, improved adsorption profile of Diphtheria toxoid antigen (D), tetanus toxoid (T) antigen and Hepatitis B (HepB) surface antigen adsorbed individually onto aluminium phosphate adjuvant, minimum total aluminum content (Al³⁺) and optimized concentration of 2-phenoxyethanol (2-PE) as preservative.