43 results about "Pneumococcal conjugate vaccine" patented technology

The invention relates to a high-efficiency 14-valent pneumococcal conjugate vaccine, which is formed by coupling and combining capsular polysaccharide extracted from fourteen types of serotype pneumococcuses and carrier protein; the fourteen types of the serotype pneumococcuses are 1, 2, 4, 5, 6A, 6B, 7F, 9N, 9V, 14, 18C, 19A, 19F and 23F; and the carrier protein is diphtherin non-toxic mutated protein CRM197, tetanus toxin protein and influenza haemophilus protein D. Compared with the prior pneumococcal conjugate vaccine, the high-efficiency 14-valent pneumococcal conjugate vaccine has the advantages that: (1) the cross-protection rate of the pneumococcuses of fourteen serotypes (1, 2, 4, 5, 6A, 6B, 7F, 9N, 9V, 14, 18C, 19A, 19F and 23F) reaches more than 90 percent; and (2) the high-efficiency 14-valent pneumococcal conjugate vaccine can generate effective protection on senior citizens which are susceptible to pneumonia and is suitable for children under two years old.

The invention relates to a novel pneumococcal conjugate vaccine and a preparation method thereof. The novel pneumococcal conjugate vaccine comprises a dual-valent serum type pneumococcal capsular sugar-protein combination and/or a multi-valent serum type pneumococcal capsular sugar-protein combination. The dual-valent serum type capsular sugar-protein combination is a combination formed by combining two different serum types of capsular sugar with a protein carrier through chemical bonds, and the two different serum types of capsular sugar form links in the structure according to the combination with the protein carrier through the chemical bonds. The multi-valent serum type capsular sugar-protein combination is a combination formed by combining two different serum types of capsular sugar with a protein carrier through chemical bonds, and the two different serum types of capsular sugar form links in the structure according to the combination with the protein carrier through the chemical bonds. In addition, the invention also provides a method of preparing the bacterial capsular sugar-protein conjugate 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. In the invention, tetanus toxoid is 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 tetanus toxoid carrier protein, and the capsular saccharide, and wherein the patient has been pre-immunised with a tetanus toxoid.

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).

This disclosure relates to vaccine formulations comprising an immunogenic composition for inducing antibodies to both S. pneumoniae and N. meningitides in a subject. In a preferred aspect, the immunogenic composition comprises covalently conjugated recombinant PsaA (“rPsaA”) from S. pneumoniae and capsular polysaccharide from N. meningitidis serogroup C. This disclosure further relates to methods for producing the immunogenic composition as well as methods for their use.

The present invention relates to a multivalent Pneumococcal conjugate vaccine (PCV) composition comprising: 1) at least 12 capsular polysaccharides selected from serotypes 1, 3, 4, 5, 6B, 7F, 9N, 9V, 15B, 14, 18C, 19A, 19F, 22F, 23F and 33F of S. pneumoniae activated with CDAP and conjugated to carrier protein selected from CRM₁₉₇, pneumococcal surface protein A (PspA), pneumococcal adhesin protein (PsaA) or combination thereof and 2) a pharmaceutically acceptable carrier, wherein the composition does not contain capsular polysaccharide from serotype 6A.

The invention relates to pneumococcal conjugate combinations. High-immune conjugates are prepared with selected combination methods suitable for different polysaccharide types and constitute one combination which is the pneumococcal conjugate combination with high immunogenicity, and the combination is used for preventing infectious diseases caused by pneumococcus. The combination vaccine is prepared from pneumococcal conjugate combinations selected from pneumococcus serotypes 1, 2, 3, 4, 5, 6A, 6B, 7F, 8, 9N, 9V, 10A, 11A, 12F, 14, 15B, 17F, 18C, 19A, 19F, 20, 22F, 23F and 33 F.

The present invention provides capsular polysaccharides from Streptococcus pneumoniae serotypes identified using NMR. The present invention further provides polysaccharide-protein conjugates in which capsular polysaccharides from one or more of these serotypes are conjugated to a carrier protein such as CRM197. Polysaccharide-protein conjugates from one or more of these serotypes may be included in multivalent pneumococcal conjugate vaccines having polysaccharides from multiple additional Streptococcus pneumoniae serotypes.

The present invention provides capsular polysaccharides from Streptococcus pneumoniae serotypes identified using NMR. The present invention further provides polysaccharide-protein conjugates in which capsular polysaccharides from one or more of these serotypes are conjugated to a carrier protein such as CRM197. Polysaccharide-protein conjugates from one or more of these serotypes may be included in multivalent pneumococcal conjugate vaccines having polysaccharides from multiple additional Streptococcus pneumoniae serotypes.

The present invention provides capsular polysaccharides from Streptococcus pneumoniae serotypes identified using NMR. The present invention further provides polysaccharide-protein conjugates in which capsular polysaccharides from one or more of these serotypes are conjugated to a carrier protein such as CRM197. Polysaccharide-protein conjugates from one or more of these N serotypes may be included in multivalent pneumococcal conjugate vaccines having polysaccharides from multiple additional Steptococcus pneumoniae serotypes.

The present invention provides capsular polysaccharides from Streptococcus pneumoniae serotypes identified using NMR. The present invention further provides polysaccharide-protein conjugates in which capsular polysaccharides from one or more of these serotypes are conjugated to a carrier protein such as CRM197. Polysaccharide-protein conjugates from one or more of these serotypes may be included in multivalent pneumococcal conjugate vaccines having polysaccharides from multiple additional Steptococcus pneumoniae serotypes.

The present invention provides pneumococcal conjugate vaccine formulations comprising surfactant systems incorporating polysorbate 20 or a combination of a poloxamer and a polyol.

The present invention provides polysaccharide-protein conjugate vaccine formulations comprising a buffer, surfactant, sugar, alkali or alkaline salt, aluminum adjuvant, optionally a bulking agent, and optionally a polymer.

The invention relates to a method for detecting the contents of various types of specific sugar in polyvalent pneumococcal conjugate vaccine. The method comprises the following steps: step I: preparing solutions of certain concentrations from various types of monovalent capsular polysaccharide-protein conjugates according to sugar concentrations; step II: taking several parts of pneumococcal conjugate vaccine, adding the conjugate solutions obtained in the first step into the parts of pneumococcal conjugate vaccine except the first part, and diluting all the samples with a solvent to the same volume, wherein the volumes of the conjugate solutions added into the parts of pneumococcal conjugate vaccine increase from the second art to the last part in sequence; step III: adding alkali into each sample for desorption, and then adding acid for neutralization to obtain standards; step IV: carrying out reactions between the standards and a detection reagent, and drawing a standard curve by taking the sugar contents of the conjugate solutions as horizontal coordinates and taking reacting values as vertical coordinates; step V: pushing the standard curve outwards to the content axis, and taking the intercepts on the content axis as the sugar contents of monovalent capsular polysaccharide-protein conjugates in the polyvalent pneumococcal conjugate vaccine.

The present invention provides a number of process improvements related to the conjugation of capsular polysaccharides from Streptococcus pneumoniae to a carrier protein. These process are serotype specific and include acid hydrolysis, addition of sodium chloride to the reductive amination reaction, and addition of sucrose to dissolve polysaccharides. Polysaccharide-protein conjugates prepared using the processes of the invention can be included in multivalent pneumococcal conjugate vaccines.

The invention provides a preparation combination of multivalence pneumococcal conjugate vaccine, a preparation method thereof and application in medicine preparation for preventing and treating diseases caused by pneumococcus. The invention further discloses a control method for conjugate molecular weight in the preparation combination of the multivalence pneumococcal conjugate vaccine. The seruminhibition problem in the multivalence pneumococcal conjugate vaccine is solved by the provided pneumococcal conjugate vaccine, and the immunogenicity in the preparation combination can be effectivelyimproved. The preparation method for the preparation combination of the multivalence pneumococcal conjugate vaccine can effectively control the molecular weight in the conjugate, and free protein andfree polysaccharide which do not join in conjugation can be easily removed.

The invention discloses a numerical and statistical modeling method for medical intervention. The method discusses the use of more realistic observation of the impact of vaccination distribution to formulate more effective vaccine policy suggestions. With the 13-valent pneumococcal conjugate vaccine (PCV13) as an example, the method discusses the timeliness and outcome of vaccination. One dose ofPCV13 is recommended to adults more than 65 years old recently so as to replace the existing 23-valence pneumococcal polysaccharide vaccine (PPV23) plan. The suggestion to the 65 age is consistent with that of most other developed countries.

The present invention provides capsular polysaccharides from Streptococcus pneumoniae serotypes identified using NMR. The present invention further provides polysaccharide-protein conjugates in whichcapsular polysaccharides from one or more of these serotypes are conjugated to a carrier protein such as CRM197. Polysaccharide-protein conjugates from one or more of these serotypes may be included in multivalent pneumococcal conjugate vaccines having polysaccharides from multiple additional Steptococcus pneumoniae serotypes.