OA20315A - Multivalent pneumococcal polysaccharide-protein conjugate vaccine. - Google Patents

Multivalent pneumococcal polysaccharide-protein conjugate vaccine. Download PDF

Info

Publication number
OA20315A
OA20315A OA1202100236 OA20315A OA 20315 A OA20315 A OA 20315A OA 1202100236 OA1202100236 OA 1202100236 OA 20315 A OA20315 A OA 20315A
Authority
OA
OAPI
Prior art keywords
pneumococcal
polysaccharide
serotypes
psaa
kda
Prior art date
Application number
OA1202100236
Inventor
Narender Dev MANTENA
Mahima DATLA
Ramesh Venkat Matur
Rajendar Burki
Balamurali MASILAMANI
Rajan Sriraman
Vivek Babu KANDIMALLA
Veerapandu SANGAREDDY
Original Assignee
Biological E Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Biological E Limited filed Critical Biological E Limited
Publication of OA20315A publication Critical patent/OA20315A/en

Links

Abstract

The present invention relates to multivalent pneumococcal polysaccharide-protein conjugates vaccine composition comprising pneumococcal capsular polysaccharide of one or more Streptococcus pneumoniae serotypes conjugated to one or more carrier proteins.

Description

MULTIVALENT PNEUMOCOCCAL POLYSACCHARIDE-PROTEIN CONJUGATE
VACCINE
FIELD OF THE INVENTION
The présent invention relates to multivalent pneumococcal polysaccharide-protein conjugates vaccine composition comprising pneumococcal capsuiar polysaccharide of one or more Streptococcus pneumoniae serotypes conjugated to one or more carrier proteins. BACKGROUND OF THE INVENTION
Streptococcus pneumoniae (“pneumococcus”) is a gram-positive bacterium that causes invasive diseases, such as pneumonia, bacteremia and meningitis, and diseases associated with colonization, such as acute otitis media (e.g., colonization of middie ear). These pneumococcus-induced diseases resuit in morbidity and mortality, particulariy in persons less than 24 months old and greater than 60 years old. The rate of pneumococcal pneumonia in the U.S. for persons over 60 years of âge is estimated to be 3 to 8 per 100,000. In 20% of cases, pneumococcal pneumonia leads to bacteremia and meningitis collectively having a mortality rate close to 30% despite antibiotic treatment.
Pneumococcal vaccines may be administered to prevent infections. Current vaccines include multivalent pneumococcal polysaccharide vaccines (comprises pneumococcal polysaccharides from two or more serotypes) and pneumococcal conjugate vaccines. The protective efficacy of the pneumococcal polysaccharide vaccine is known to be related to the concentration of antibody generated against a capsuiar polysaccharide. Pneumococcus cells are encapsulated with a polysaccharide giving rise to more than 90 different pneumococcus serotypes. The capsule is the principal virulence déterminant for pneumococci - it not only protects the ce!!’s inner surface from complément mediated cell lysis, it is also poorly immunogenic.
Merck’s Pneumovax®23 is a multivalent pneumococcal polysaccharide vaccine and contains unconjugated capsuiar polysaccharides from 23 pneumococcal serotypes including serotypes 1,2, 3, 4, 5, 6B, 7F, 8, 9N, 9V, 10A, 11A, 12F, 14, 15B, 17F, 18C, 19F, 19A, 20, 22F, 23F and 33F. In addition to Pneumovax®23, the multivalent pneumococcal polysaccharide vaccines that hâve been licensed so far proved valuable in preventing pneumococcal disease in adults, particulariy, the eiderly and those at high-risk. However, infants and young children respond poorly to these unconjugated pneumococcal polysaccharide vaccines.
Prevnar®-7 is a pneumococcal polysaccharide-protein conjugate vaccine and includes the seven most frequently isolated polysaccharide serotypes (e.g., 4, 6B, 9V, 14, 18C, 19F, and 23F conjugated to CRM197). Since the use of Prevnar®-7 began in the United States in 2000, there has been a significant réduction in invasive pneumococcal disease (IPD) in children. A 13-valent conjugale vaccine Prevenar-13®, containing thirteen serotypes 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F conjugated to CRM197,was deveioped and approved due to the limitations in serotype coverage with Prevnar®-7 in certain régions of the world.
Synflorix® is a pneumococcal vaccine that includes ten polysaccharide serotypes 1, 4, 5, 6B, 7F, 9V, 14, 23F - conjugated to protein D (PD), serotype 180 conjugated to tetanus toxoid (TT) and serotype 19F conjugated to diphtheria toxoid (DT). Each of the serotype polysaccharides is coupled utilizing 1-cyano-4-dimethylamino-pyridinium tetrafluoroborate (CDAP) under controlled pH.
U.S. Patent No. 5,360,897 discloses pneumococcal vaccines wherein an immunogenic conjugale comprising a reductive amination product of an intact capsular polymer of the bacterial pathogen Streptococcus pneumoniae having at least two carbonyl groups and a bacterial toxin or toxoid, said conjugale comprising a cross-linked conjugale in which there is a direct covalent linkage between the capsular polymer and the toxin or toxoid.
U.S. Patent No. 5,693,326 provides a generalized method for preparing a conjugale vaccine wherein for activating viral, fungal or bacterial polysaccharides, an organic cyanylating agent is used selected from the group 1-cyano-4-(d!methylam!no)-pyridinium tetrafluoroborate, N-cyanotriethyl-ammonium tetrafluoroborate, and p-nitrophenylcyanate, to form an activated carbohydrate and is subsequently coupled to the protein or carrier protein.
U.S. Patent No. 5,854,416 discloses amino acid and DNA sequences of 37-kDa protein from Streptococcus pneumonia known as PsaA (Pneumococcal surface adhesion A).
U.S. Patent No. 7,862,823 discioses a multivalent conjugale vaccine composition comprising pneumococcal capsular polysaccharides with at least two different carrier proteins, such as DT and TT.
U.S. Patent No. 8,192,746 discloses a 15-valent pneumococcal polysaccharideprotein conjugale vaccine composition having capsular polysaccharides from serotypes 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F, and 33F conjugated ίο CRIVW
U.S. Patent No. 8,557,250 B2 discloses a method comprising contacting a mixture of a plurality of cyanate activated immunogenic distinct polysaccharides with at least one hydrazide activated protein.
U.S. Patent No. 8,808,708 and U.S. Patent No. 8,603,484 describes a 13-valent immunogenic composition consisting of polysaccharide-protein conjugales wherein serotypes consist of 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F and carrier protein CRM197.
U.S. Patent Publication No. 2010/0074922 A1 discloses an immunogenic composition containing 10 or more serotypes wherein 19F capsular saccharide is conjugated to DT, serotype 18C capsular saccharide is conjugated to tetanus toxoid and serotypes 1, 4, 5, 6B, 7F, 9V, 14 and 23F capsular saccharides are conjugated to Protein D isolated from Haemophilus influenzae.
U.S. Patent Publication No. 2010/0239604 describes an immunogenic composition comprising multivalent Streptococcus pneumoniae capsular saccharide conjugales from serotypes 19A and 19F wherein serotype 19A is conjugated to a first bacterial toxoid and 19F is conjugated to a second bacterial toxoid and 2-9 of the Streptococcus pneumoniae capsular saccharides are conjugated to protein D.
U.S. Patent Publication No. 2012/321658 A1 discloses an immunogenic composition wherein serotypes 1,3, 19A and 19F linked to protein carrier(s) either directly or indirectly through a chemistry other than reductive amination, and one or more different saccharides is/are selected from a second group consisting of serotypes 4, 5, 6A, 6B, 7F, 9V, 14, 18C and 23F which is/are linked to a protein carrier(s) by reductive amination.
IN 140/DEL/2011 provides a Streptococcus pneumonia vaccine comprising either of (a) 7 or more (b) 10 or more polysaccharides from serotypes conjugated to at least 2 or more carrier proteins selected from a group comprising DT, diphtheria toxoid, CRM197, and tetanus toxoid.
WO Publication No. 2013/191459 A1 discloses a 15 valent pneumococcal conjugale composition comprising different serotypes of Streptococcus pneumoniae derived from a capsular polysaccharide 1, 2, 3, 4, 5, 6A, 6B, 7F, 9N, 9V, 14, 18C, 19A, 19F and 23F conjugated to CRM197.
WO Publication No. 2014/092377 A1 discloses a 13 valent pneumococcal conjugale composition wherein 12 serotypes are selected from 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F and the last serotype is either 2 or 9N conjugated to CRM197.
WO Publication No. 2014/092378 A1 describes an immunogenic pneumococcal conjugate composition where 12 serotypes are selected from 1,3,4, 5,6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F and remaining one from 22F or 33F conjugated to CRM197.
WO Publication No. 2016/207905 A2 discîoses 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, 18Q, 19A, 19F, 22F, 23F and 33F of Streptococcus pneumoniae activated with CDAP and conjugated to carrier protein
CRMi97, and 2) a pharmaceutically acceptable carrier, wherein the composition does not contain capsular polysaccharide from serotype 6A.
WO 2018/064444A1 of the présent applicant describes a pneumococcai vaccine composition, the composition comprising two or more capsular pneumococcai polysaccharide serotypes each individualiy conjugated to a carrier protein pneumococcai surface adhesion protein A (PsaA) or combination of PsaA and CRM-197.
Chinese Patent Application Publication No. CN 101590224 describes a 14 valent pneumococcai polysaccharide-protein conjugate vaccine containing serotypes 1, 2, 4, 5, 6A, 6B, 7F, 9N, 9V, 14, 18C, 19A, 19F and 23F conjugated to CRM197.
Chinese Patent Application Publication No. CN 103623401 discloses a 14 valent pneumococcai capsular polysaccharide - protein conjugate composition wherein said 14 different serotypes are 1, 3, 4, 5, 6A, 6B, 9V, 14,18C, 19A, 19F, 22F, 23F and 33F conjugated to CRM197.
Chinese Patent Application Publication No. CN 103656631 provides a multivalent pneumococcus capsular polysaccharide-protein conjugate composition and a préparation method thereof. The conjugate composition is prepared from capsular polysaccharides of pneumococcus of 24 different serotypes and a carrier protein in a covalent linkage manner, wherein the 24 different serotypes are 1, 2, 3, 4, 5, 6A, 6B, 7F, 8, 9N, 9V, 10A, 11 A, 12F, 14, 15B, 17F, 18C, 19A, 19F, 20, 22F, 23F and 33F conjugated to CRMi97.
Chinese Patent Application Publication No. CN 103656632 discloses a multivalent pneumococcai capsular polysaccharide composition containing serotype 6A and at least one extra serotype selected from the group consisting of 1, 2, 3, 4, 5, 6B, 7F, 8, 9N, 10A, 11A, 12F, 14, 15B, 17F, 18C, 19A, 19F, 20, 22F, 23F and 33F conjugated to CRM197.
Chinese Patent Application Publication No. CN 104069488 discloses a multivalent pneumococcus capsular polysaccharide vaccine of 14 different serotypes and carrier protein, wherein the 14 serotypes include 1, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F conjugated to CRM197.
Anderson P et al, (2003, Vaccine; 21 (13-14):1554-9) discloses a comparative study of tetravalent pneumococcai conjugate vaccines with each polysaccharide types 6A, 14, 19F, and 23F separately coupled to tetanus toxoid or diphtheria CRM197 or a mixture of halved doses of polysaccharide types 6A, 14, 19F, and 23F separately coupled to tetanus toxoid and diphtheria CRM197.
Nurkka et al. (2004, Ped. Inf. Dis. J., 23:1008-1014) discloses a study of the immunogenicity and safety of an 11-valent pneumococcai protein D conjugate vaccine where no priming effect was observed for serotype 3 in infants who had received three doses of the vaccine followed by a booster dose of either the same vaccine or a pneumococcal polysaccharide vaccine.
The above-mentioned référencés disclose, amongst other compositions, methods, and the like, multivalent pneumococcal conjugale vaccines comprising polysaccharides from one or more serotypes as well as conjugation of these polysaccharides with carrier proteins. In viewof the different serotypes that are prévalent across various régions, there is a need for additionai multivalent pneumococcal vaccines comprising noveî conjugales of polysaccharide serotypes with improved immune response, as well as to develop simple and efficient production thereof.
Surprisingly, the multivalent pneumococcal conjugale vaccine compositions of the présent invention offer an improved immune response over the naive multivalent pneumococcal vaccines and existing pneumococcal conjugale vaccines.
SUMMARY OF THE INVENTION
The présent invention provides a 24-valent pneumococcal polysaccharide protein conjugate vaccine composition comprising one or more Streptococcus pneumoniae serotypes conjugated to one or more carrier protein(s).
In another embodiment, the présent invention provides a pneumococcal conjugate vaccine composition comprising capsuiar polysaccharide from serotypes of Streptococcus pneumoniae conjugated to one or more carrier proteins, wherein the serotypes comprise 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B.
In yet another embodiment, the présent invention also provides a pneumococcal conjugate vaccine composition comprising capsuiar polysaccharide from serotypes of Streptococcus pneumoniae conjugated to one or more carrier proteins, wherein the serotypes comprises of 1,3, 4,5,6^66, 7F, 8,9V, 10A, 11A, 12F, 14, 15A, 18C 19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B and the carrier protein is selected from CRM197 or combination of CRM197 and PsaA or combination of CRM197 and Tetanus toxoid or combination of PsaA and Tetanus toxoid or combination of CRM197, PsaA and Tetanus toxoid or combination of CRM197, PsaA, Protein D, Diphtheria toxid and Tetanus toxoid.
In an embodiment, the présent invention provides a pneumococcal conjugate vaccine composition comprising capsuiar polysaccharide from serotypes of Streptococcus pneumoniae conjugated to a carrier protein, wherein the serotypes comprise 1,3,4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B and the carrier protein is CRMi97.
In an embodiment, the présent invention provides a pneumococcal conjugate vaccine composition comprising capsuiar polysaccharide from serotypes of Streptococcus
A.
pneumoniae conjugated to a carrier protein, wherein the serotypes comprise 1,3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11 A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B and the carrier protein is PsaA.
In an embodiment, the présent invention provides a pneumococcal conjugale vaccine composition comprising capsuler polysaccharide from serotypes of Streptococcus pneumoniae conjugated to one or more carrier proteins, wherein the serotypes comprise 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B and the carrier protein isCRMia?, PsaA or combination thereof.
In an embodiment, the présent invention provides a pneumococcal conjugate vaccine composition comprising capsular polysaccharide from serotypes of Streptococcus pneumoniae conjugated to one or more carrier proteins, wherein the serotypes comprise 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B and the carrier protein is CRM197, PsaA, Tetanus toxoid or combination thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 SEC-HPLC chromatogram illustrating conjugation reaction kinetics of (A) serotype 3 and (B) serotype 6B with PsaA.
Figure 2 SEC-HPLC chromatogram illustrating conjugation reaction kinetics of (A) serotype 6A-CRM197 and (B) serotype 6A with PsaA.
Figure 3 SEC-HPLC chromatogram illustrating conjugation reaction kinetics of (A) serotype 8-CRM197 and (B) serotype 8-PsaA.
Figure 4 SEC-HPLC chromatogram illustrating conjugation reaction kinetics of (A) serotype 10A-CR*vT97 and (B) serotype 10A-PsaA.
Figure 5 SEC-HPLC chromatogram illustrating conjugation reaction kinetics of (A) serotype 11A-CRMigz and (B) serotype 11A-PsaA.
Figure 6 SEC-HPLC chromatogram illustrating conjugation reaction kinetics of (A) serotype 12F-CRM197 and (B) serotype 12F-PsaA.
Figure 7 SEC-HPLC chromatogram illustrating conjugation reaction kinetics of (A) serotype 15A-CRM197 and (B) serotype 15A-PsaA
Figure 8 SEC-HPLC chromatogram illustrating conjugation reaction kinetics of (A) serotype 23A-CRMi97 and (B) serotype 23A-PsaA.
Figure 9 SEC-HPLC chromatogram illustrating conjugation reaction kinetics of (A) serotype 23B-CRM197 and (b) serotype 23B-PsaA.
Figure 10 SEC=HPLC chromatogram illustrating conjugation reaction kinetics of (A) serotype 24F-CRMi97 and (b) serotype 24F-PsaA.
Figure 11 SEC-HPLC chromatogram illustrating conjugation reaction kinetics of (A) serotype 35B-CRMi3? and (B) serotype 35B-PsaA.
Figure 12A . Sérum antibody tiiers in rabbïts immunized with Formulation I
Figure 12B: Sérum antibody titers in rabbits immunized with Formulation II. DEFINITIONS
Throughout this invention, the singular terms “a,* an, and the include plural référants unless the context clearly indicates otherwise. Similarly, unless the word or is expressly limited to mean only a single item exclusive from the other items in reference to a list of two or more items, then the use of ΒοΓ in such a lîst is to be interpreted as including (a) any single item in the list, (b) ail of the items in the list, or (c) any combination of the items in the list. Additionally, the terms comprising and the like are used throughout this invention to mean including at ieast the recited feature(s) such that any greater number of the same feature(s) and/or one or more additional types of features are not precluded. Reference herein to one embodiment, an embodiment,” or similar formulations means that a particuiar feature of a composition, a composition, a method, or a characteristic described in connection with the embodiment may be included in at least one embodiment of the présent technology. Thus, the appearances of such phrases or formulations herein are not necessarily ail referring to the same embodiment. Furthermore, various particular features, compositions, methods, or characteristics may be combined in any suitable manner in one or more embodiments.
This invention is not intended to be exhaustive or to limit the présent technology to the précisé forms disclosed herein. Although spécifie embodiments are disclosed herein for illustrative purposes, various équivalent modifications are possible without deviating from the présent technology, as those of ordinary skill in the relevant art will recognize. In some cases, welkknown structures and functions hâve not been shown and/or described in detail to avoid unnecessarily obscuring the description of the embodiments of the présent technology. Although steps of methods may be presented herein in a particular order, in alternative embodiments the steps may hâve another suitable order. Similarly, certain embodiments of the présent technology disclosed in the context of particular embodiments may be combined or eliminated in other embodiments. Furthermore, while advantages associated with certain embodiments may hâve been disclosed in the context of those embodiments, other embodiments may also exhibit such advantagês, and not ali embodiments need necessarily exhibit such advantages or other advantages disclosed herein to faH within the scope of the présent technology. Accordingly, this disclosure and associated technology may encompass other embodiments not expressly shown and/or described herein,
Unless defined otherwise, ail technical and scientific terms used herein hâve the same meaning as commonly understood by one of ordinary skill in the art to which the methods belong. Although any immunogenic compositions, vaccine compositions or methods similar or équivalent to those described herein can also be used in the practice or testing ofthe embodiments ofthe présent invention, représentative illustrative methods and compositions are now described.
Where a range of values is provided, it is understood that each intervening value between the upper and lower limit of that range and any other stated or intervening value in that stated range, is encompassed within by the methods and compositions. The upper and lower limits of these smaller ranges may independently be included in the smaller ranges and are also encompassed within by the methods and compositions, subject to any specifically exciuded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included in the methods, compositions and combinations.
As used herein, the term “capsular polysaccharide” refers to a layer of polysaccharide extemal to but contiguous with the cell wall of Streptococcus pneumoniae serotypes 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B.
The term “sized” or “sizing” as used herein refers to reducing the size of a native polysaccharide by various methods. The methods may include mechanical methods, such as homogenization. Reducing the size of a native polysaccharide or “sizing” provides various advantages which include: (1) imparting high immunogenicity as compared to the native polysaccharides (2) the ratio of polysaccharide to protein in the conjugale can be altered (3) sized polysaccharides may provide greater stability to the composition.
The term Molecular weight or Molecular size or Average Molecular size or Average molecular weight of a polysaccharide as used herein refers to the weightaverage molecular weight (Mw) of the polysaccharide measured by MALLS (Multi-Angle Laser Light Scattering).
As used herein, the terms “immunogenic composition” and “vaccine composition” are used interchangeably.
As used herein, the term “carrier protein” refers to any protein or fragment thereof to which the haptens (weak antigens) is coupled or attached orconjugated, typically for the purpose of enhancing or facilitating détection of the antigen by the immune System. Exemples of carrier proteins include,. but are not limited to CRMig/, PsaA, Tetanus toxoid and fragments thereof.
The term “conjugate” or “conjugated” as used herein is used to mean that a Streptococcus pneumoniae capsular polysaccharide is covalently bonded to a carrier protein.
As used herein, the term “adjuvant” refers to the non-antigenic component of the vaccine that enhances the immune response of the antigens of the vaccine by facilitating the contact between the antigen and the immune System by influencing the type and the quality of the immune response generated against an antigen. The adjuvant causes prolonged immune responses against the antigens and also may serve to decrease the toxicity of certain antigens or provide solubility to certain antigens.
As used herein, the term “pharmaceutically acceptable carrier(s) refers to one or more optional components which may be added to the vaccine formulation for administration of the antigens and/or viruses which does not itself induce the production of antibodies harmful to the individual receiving the composition, and which may be administered without undue toxicity. Suitable carriers may be large, slowly metabolized macromolecules such as proteins, polysaccharides, polylactic acids, polyglycolic acids, polymeric amino acids, amino acid copolymers, and inactive virus particles. The term includes one or more excipient, stabilizer, diluents, buffers or surfactants, lyophilization excipient or a combination thereof. By pharmaceutically acceptable or pharmacologically acceptable is meant a material which is not biologically or otherwise undesirabie, Le., the material may be administered to an individual in a formulation or composition without causing any undesirabie biological effects or interacting in a deleterious manner with any of the components ofthe composition in which it is contained.
DETAILED DESCRIPTION OF THE INVENTION
The présent invention provides a 24 valent pneumococcal polysaccharide-protein conjugate vaccine composition comprising polysaccharides from 24 different serotypes of Streptococcus pneumoniae conjugated to one or more carrier proteins.
In an embodiment, the présent invention also provides a pneumococcal conjugate vaccine composition comprising capsular polysaccharide from 24 different serotypes of Streptococcus pneumoniae conjugated to a carrier protein, wherein the serotypes comprise 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B wherein the carrier protein is selected from CRM197 or combination of CRM197 and PsaA or combination of CRM197 and Tetanus toxoid or combination of PsaA and Tetanus toxoid or combination of CRM-197, PsaA and Tetanus toxoid.
In an embodiment, the présent invention provides a 24 valent pneumococcal polysaccharide-protein conjugate vaccine composition selected from serotypes of
Streptococcus pneumoniae 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11 A, 12F, 14, 15A, 18C, 19A, 19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B wherein at least thirteen serotypes are conjugated to CRM197 and remaining serotypes are conjugated to PsaA.
In a preferred embodiment, the présent invention provides a 24 valent pneumococcal polysaccharide-protein conjugate vaccine composition comprising capsular polysaccharide from serotypes of Streptococcus pneumoniae 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B, wherein capsular polysaccharide from serotypes 1, 4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F are conjugated to CRM197 carrier protein and capsular polysaccharide from serotypes 3, 6A, 8, 10A, 11 A, 12F, 15A, 23A, 23B, 24F and 35B are conjugated to PsaA.
In an embodiment, the présent invention provides a 24 valent pneumococcal polysaccharide-protein conjugate vaccine composition comprising capsular polysaccharide from different selected from serotypes of Streptococcus pneumoniae 1,3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 180, 19A, 19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B conjugated to CRM197 carrier protein.
In an embodiment, the présent invention provides a 24 valent pneumococcal polysaccharide-protein conjugate vaccine composition comprising capsular polysaccharide from different selected from serotypes of Streptococcus pneumoniae 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C, 19A, 19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B conjugated to PsaAcarrier protein.
In a preferred embodiment, the présent invention provides a 24 valent pneumococcal polysaccharide-protein conjugate vaccine composition comprising capsular polysaccharide from serotypes of Streptococcus pneumoniae 1,3,4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B, wherein capsular polysaccharide from serotypes 3, 6A, 8, 10A, 11A, 12F, 15A, 23A, 23B, 24F and 35B are conjugated to PsaA and capsular polysaccharide from serotypes 1, 4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F are conjugated to combination of CRM197 and Tetanus toxoid.
In an embodiment, the présent invention provides a pneumococcal vaccine composition comprising pneumococcal polysaccharides wherein one or more of the pneumococcal polysaccharides are native pneumococcal polysaccharides.
fn another embodiment, the présent invention provides a pneumococcal vaccine composition comprising pneumococcal polysaccharides wherein one or more of the pneumococcal polysaccharides are fragmented, each fragmented pneumococcal polysaccharide having an average molecular weight less than that of a native pneumococcal polysaccharide and may range from 50 to 1000 kDa.
In yet another embodiment, the invention provides an isolated and purified capsular polysaccharides from serotypes of Streptococcuspneumoniae 1,3,4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B wherein each polysaccharide having a molecuiar weight between about 50 and 1000 kDa, preferably, having an average size (Mw) of between 100-1000, 200-800, 250-600, or 300400, 70-150, or 75-125 kDa.
In yet other embodiments, the présent invention provides pneumococcal polysaccharide-protein conjugate vaccine compositions comprising polysaccharides from 24 different serotypes of Streptococcus pneumoniae 1,3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11 A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B, conjugated to carrier protein selected from CRMi97 or combination of CRM197 and PsaA or combination of CRM197 and Tetanus toxoid or combination of PsaA and Tetanus toxoid or combination of CRM197, PsaA and Tetanus toxoid, wherein the polysaccharide-protein conjugates having a molecuiar weight ranging between about 500 kDa to about 5000 kDa; 1,000 kDa to about 10,000 kDa; about 1,500 kDa to about 15,000 kDa; about 2,000 kDa to about 20,000 kDa; about 2,500 kDa to about 25,000 kDa; or about 3,000 kDa to about 30,000 kDa.
In yet another preferred embodiment, the présent invention provides a 24 valent pneumococcal polysaccharide-protein conjugate vaccine composition comprising about 2.2 to 2.4 pg of each capsular polysaccharide from serotypes of Streptococcus pneumoniae 1, 3, 4, 5, 6A, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B and about 4.4 pg 6B, wherein each capsular polysaccharide from serotypes 1, 4, 5, 6B, 7F, 9 V, 14, 18C, 19A, 19F, 22F, 23F and 33F are conjugated to about 30 to 35 pg of CRM197 carrier protein and each capsular polysaccharide from serotypes 3, 6A, 8, 10A, 11 A, 12F, 15A, 23A, 23B, 24F and 35B are conjugated to about 20 to 30 pg of PsaA.
In yet another preferred embodiment, the présent invention provides a 24 valent pneumococcal polysaccharide-protein conjugate vaccine composition comprising about 2.2 to 2.4 pg of each capsular polysaccharide from serotypes of Streptococcus pneumoniae 1, 3, 4, 5, 6A, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B and about 4.4 pg 6B, wherein each capsular polysaccharide is conjugated to about 40 to 80 pg of PsaA.
In yet another preferred embodiment, the présent invention provides a 24 valent pneumococcal polysaccharide-protein conjugate vaccine composition comprising about 2.2 to 2.4 pg of each capsular polysaccharide from serotypes of Streptococcus pneumoniae 1, 3, 4, 5, 6A, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A,
23B, 23F, 24F, 33F and 35B and about 4.4 pg 6B, wherein each capsuiar polysaccharide is conjugated to about 40 to 80 pg of CRM197.
In a further aspect, the présent disclosure provides an isolated Streptococcus pneumoniae serotype 15A having an average molecular weight between 50 to 1000 kDa and glycerol content in the range of 5-18%.
The presence of glycerol phosphate side chains can be determined by measurement of glycerol using high performance anion exchange chromatography with pulsed amperometric détection (HPAEC-PAD) after its release by treatment of the polysaccharide with hydrofluoric acid (HF).
In a further aspect, the présent disclosure provides an isolated Streptococcus pneumoniae serotype 35B capsuiar polysaccharide having an average molecular weight between 50 to 1000 kDa and acetate content in the range of 2-10%, preferably 2 to 8%.
In another embodiment, the présent invention provides a pneumococcal conjugate vaccine composition comprising pneumococcal polysaccharides where each of the pneumococcal polysaccharides is activated with 1-cyano-4-dimethylamino-pyridinium tetrafluoroborate (CDAP) to form a cyanate ester prior to conjugation to the carrier protein.
In another embodiment, the présent invention provides a pneumococcal conjugate vaccine composition comprising pneumococcal polysaccharides where one or more of the pneumococcal polysaccharides are directly coupled to an amino group of the carrier protein or are coupled to the amino group by a spacer.
In another embodiment, the présent invention provides a pneumococcal conjugate vaccine composition comprising pneumococcal polysaccharides wherein the spacer is cystamine, cysteamine, hexane diamine, adipic acid dihydrazide (ADH), EDAC or EDC.
PsaA carrier protein according to the présent invention is a modified PsaA and does not include wild-type hydrophobie N-terminal leader peptide.
The présent invention provides a pneumococcal conjugate vaccine composition comprising pneumococcal polysaccharides of one or more serotypes and a carrier protein wherein the PsaA carrier protein comprise 290 amino acids.
The pneumococcal conjugate vaccine composition comprising capsuiar pneumococcal polysaccharide serotypes each individually conjugated to a carrier protein, referred to herein as polysaccharide-protein conjugates and/or conjugales. When included in the pneumococcal vaccine composition described herein is a multivalent pneumococcal polysaccharide-protein conjugate vaccine (also referred to herein as multivalent conjugate vaccine, conjugate vaccine, and/or polysaccharide-protein conjugate vaccine). In addition to the multivalent conjugate vaccine, the présent invention provides a process for preparing and/or administering the same to a subject in need thereof.
Carrier proteins are non-toxic and non-reactogenic proteins that are obtainable in a sufficient amount and purity. In some embodiments, the présent invention provides a pneumococcal conjugale vaccine composition comprising one or more carrier proteins conjugated to one or more Streptococcus pneumoniae polysaccharides (also referred to herein as “pneumococcal polysaccharides”). By conjugating a pneumococcal polysaccharide to a carrier protein, the pneumococcal polysaccharide has increased immunogenicity over the unconjugated pneumococcal polysaccharide.
In some embodiments of the présent invention, a combination of the carrier protein used, which includes two or more carrier proteins, such as PsaA, CRM197, Protein D, Diphtheria toxoid and tetanus toxoid (TT).
In another embodiment, the pneumococcal polysaccharide-protein conjugate compositions of the présent invention further comprise one or more of the following: a pharmaceutically acceptable carrier, a pharmaceutically acceptable diluent, a buffer, a preservative, a slabiiizer, an adjuvant, surfactants, solvents, and/or a lyophilization excipient. Suitable buffers include, but not limited to, Tris(trimethamine), phosphate, acetate, borate, citrate, glycine, histidine and succinate and the like. Suitable surfactants include but not limited to Polysorbate-20, Polysorbate-40, Polysorbate-60 (Tween 60), Polysorbate-80 (Tween 80), copolymers of ethylene oxide (EO), propylene oxide (PO), and/or butylène oxide (B0), poloxamer 124, poloxamer 188, poloxamer 237, poloxamer 338 and poloxamer 407.octoxynols, sorbitan trioleate (Span 85), and sorbitan monolaurate and the like at a concentration from about 0.001% to about 2%.
The composition of the présent invention is formulated in buffered saline solution having a pH in the range from 5.0 to 8.0.
In some embodiments, the pneumococcal polysaccharides may be extracted from one or more microorganisms (e.g. Streptococcus pneumoniae) according to conventional methods. For example, pneumococcal polysaccharides may be prepared according to known procedures. Furthermore, purification of the pneumococcal polysaccharides may be performed according to the procedure described in PCT publication WO 2016/174683 A1.
The extracted pneumococcal polysaccharides may be purified according to conventional methods and may be used in its native form. In other embodiments, the extracted and purified pneumococcal polysaccharides may be fragmented to obtain one or more portions of the pneumococcal polysaccharide, each portion of the pneumococcal polysaccharide having an average molecular weight less than that of the extracted and purified pneumococcal polysaccharides.
In other embodiments, the extracted and purified pneumococcal polysaccharides may be activated prior to conjugation to one or more carrier proteins. For example, the extracted and purified pneumococcai polysaccharides may be activated (e.g., chemically) prior to conjugation to one or more carrier proteins. Each activated pneumococcai polysaccharide may be each individuaiîy conjugated to a carrier protein forming a polysaccharide-protein conjugate (e.g., a glycoconjugate). In other embodiments, one or more of the activated pneumococcai polysaccharides may be conjugated to an individual carrier protein. The conjugales may be prepared by known techniques.
In some embodiments, the pneumococcai polysaccharides may be chemically activated and subsequently conjugated to carrier proteins according to known techniques, such as those described in U.S. Pat. Nos. 4,365,170, 4,673,574 and 4,902,506. For example, pneumococcai polysaccharides can be activated by oxidation of a terminal hydroxyl group to an aldéhyde with an oxidizing agent, such as periodate (e.g., sodium periodate, potassium periodate, or periodic acid) by random oxidative cleavage of one or more vicinal hydroxyl groups of the carbohydrates and formation of one or more reactive aldéhyde groups.
The pneumococcai polysaccharides may also be activated by CDAP (1-cyano-4dimethylamino-pyridinium tetrafluoroborate) and subsequently conjugated to one or more carrier proteins such as PsaA, CRM197, PspA, or combination thereof. In other embodiments, pneumococcai polysaccharides activated with CDAP to form a cyanate ester may be directly conjugated to one or more carrier proteins or conjugated using a spacer (e.g., linker). The spacer may couple to an amino group on the carrier protein. In some embodiments, the spacer may be cystamine or cysteamine, which generates a thiolated polysaccharide that may be coupled to the carrier protein through a thioether linkage to a maleimide-activated carrier protein (e.g., using GMBS) or a haioaceiylated carrier protein (e.g., using iodoacetimide, ethyl iodoacetimide HCl, SIAB, SIA, SBAP, and/or Nsuccinimidyl bromoacetate. in other embodiments, the cyanate ester is coupled using hexane diamine or adipic acid dihydrazide (ADH) and an amino-derivitized saccharide is conjugated to a camer protein using carbodiimide (e.g. EDAC or EDC) chemistry via a carboxyl group on the protein carrier. Such conjugales are described in PCT Publication No. WO 93/15760, PCT Publication No. WO 95/08348, PCT Publication No. WO 96/29094, and Chu et al., 1983, Infect. Immunity 40:245-256.
Other suitable activation and/or coupling techniques for use with the polysaccharide-protein conjugales and vaccine compositions of the présent invention include the use of carbodiimides, hydrazides, active esters, norborane, p-nitrobenzoic acid, N-hydroxysuccinimide, S—NHS, EDC, TSTU, and other methods described in PCT Publication No. WO 98/42721. For example, conjugation may involve a carbonyl linker which may be formed by reaction of a free hydroxyl group ofthe saccharide with CDI (See
Bethell étal., 1979. J. Biol. Chem. 254:2572-4; Hearn étal., 1981, J. Chromatogr. 218:50918) followed by coupling with a protein to form a carbamate linkage. In some embodiments, the anomeric terminus may be reduced to a primary hydroxyl group, optional protection/deprotection of the primary hydroxyl group, reaction of the primary hydroxyl 5 group with GDI to form a GDI carbamate intermediate and coupling the GDI carbamate intermediate with an amino group on a protein.
For example, another suitable activation and/or coupling techniques for use with the polysaccharide-protein conjugates and vaccine compositions of the présent invention include the following method: sized pneumococcal polysaccharides (e.g., about 6 mL of 10 sized polysaccharide at a concentration of about 10 mg/mL) and CDAP (e.g., about 100 mg/mL in acetonitrile (w/v)) can be mixed in a glass vial in a ratio of about 1 to about 1 (e.g., by stirring for about 1 minute). The pH of the polysaccharide solution may be adjusted as necessary (e.g., to about 9.25 with about 0.2M triethylamine and stirred for 3 min at room température). In addition, PsaA (e.g., about 4 mL of a solution having a concentration 15 of about 15 mg/mL) may be added slowly to the activated pneumococcal polysaccharides (e.g., in a ratio of about 1 to about 1 (Ps: Carrier protein)), The pH of the reaction may be adjusted (e.g., to about 9.05 using 0.2M trimethylamine) and the reaction may be continued (e.g., by stirring for 5 hours at room température). The reaction mixture may be quenched (e.g., by addition of an excess concentration of glycine).
In some embodiments, the reaction mixture may be diafiltered using a membrane (e.g., a 100 K MWCO membrane) and may be purified by size-exclusion chromatography. The diafiltered and purified fractions may be analyzed using SEC-MALLS, and an anthrone method. The analyzed fractions containing conjugates may be pooled and stérile filtered (e.g., using 0.2 pm filters).
Following conjugation of pneumococcal polysaccharides to one or more carrier proteins, the polysaccharide-proteinconjugates may be purified (e.g., enriched with respect to the amount of polysaccharide-protein conjugate) by a variety of techniques. These techniques include, but are not limited to concentration/diafiltration operations, precipitation/eiution, column chromatography, and depth filtration. For example, after the 30 conjugates are purified, the conjugates may be compounded to formulate the pneumococcal polysaccharide-protein conjugate compositions of the présent invention, which may be used as vaccines.
In some embodiments, the présent invention provides a method for preparing a polysaccharide-protein conjugate of the pneumococcal vaccine composition described 35 herein wherein the method further comprises formuiating the polysaccharide-protein conjugale into the pneumococcal vaccine composition including an adjuvant, an excipient, and a butter.
In some embodiments, the présent invention provides a method for preparing a polysaccharide-protein conjugale of the pneumococcal vaccine composition described herein wherein the adjuvant is aluminum phosphate.
In some embodiments, the présent invention provides a method of preventing or treating a subject in need thereof comprising, administering a pneumococcal vaccine composition described herein to the subject in need thereof.
In some embodiments, the subject has a disease mediated by Streptococcus pneumoniae, such as invasive pneumococcal disease (IPD).
In one embodiment, the subject is a human, such as an infant (îess than about 1 year of âge), a toddler (about 12 months to about 24 months of âge), a young child (about 2 years to about 5 years of âge), an older child (about 5 years to about 13 years of âge), an adolescent (about 13 years to about 18 years of âge), an aduît (about 18 years to about 65 years of âge), or an elder (more than about 65 years of âge).
In some embodiments, the présent disclosure provides a method of inducing an immune response comprising administering an immunologically effective amount of the pneumococcal conjugate vaccine composition described herein to a subject.
In one embodiment, method of inducing an immune response comprising administering the pneumococcal conjugate vaccine composition described herein to the subject systemically, subcutaneously, and/or mucosally.
In some embodiments, an amount of each conjugate in a dose of the vaccine compositions of the présent invention is in an amount sufficient to induce an immunoprotective response, such as an immunoprotective response without significant, adverse effects. While the amount of each conjugate may vary depending upon the pneumococcal serotype, each dose of the vaccine compositions may comprise about 0.1 ug to about 50 ug of each pneumococcal polysaccharide, about 0.1 ug to about 10 pg, or about 1 pg to about 5 pg of each pneumococcal polysaccharide conjugated to each carrier protein comprising about 1.5 pg to about 5 pg of carrier protein.
In another embodiment, the présent invention provides a pneumococcal conjugate vaccine composition comprising pneumococcal polysaccharides and carrier proteins, the pneumococcal conjugale vaccine composition having a percent ratio of protein to polysaccharide (protein/PS) of about 0.3 to about 2.0 protein/PS, preferably, 0.5 to 1.5.
In some embodiments, the purified polysaccharides before conjugation hâve a molecular weight of between 10 kDa and 2,000 kDa. In other such embodiments, the polysaccharide has a molecular weight of between 50 kDa and 2,000 kDa. between 50 kDa and 2,000 kDa; between 50 kDa and 1,750 kDa; between 50 kDa and 1,500 kDa; between 50 kDa and 1,250 kDa; between 50 kDa and 1,000 kDa; between 50 kDa and 750 kDa; between 50 kDa and 500 kDa; b 100 kDa and 2,000 kDa; between 100 kDa and 2,000 kDa; between 100 kDa and 1,750 kDa; between 100 kDa and 1,500 kDa; between 100 kDa and 5 1,250 kDa; between 100 kDa and 1,000 kDa; between 100 kDa and 750 kDa; between 100 kDa and 500 kDa.
In other embodiments. the présent invention provides pneumococcal polysaccharide-protein conjugate vaccine compositions comprising one or more polysaccharide-protein conjugates having a molecular weight ranging between about 1,000 10 kDa to about 10,000 kDa, about 1,500 kDa to about 15,000 kDa, about 2,000 kDa to about 20,000 kDa, about 2,500 kDa to about 25,000 kDa, or about 3,000 kDa to about 30,000 kDa.
The pneumococcal polysaccharide-protein conjugate vaccine compositions of the présent invention may be manufacturée using known methods. For example, the 15 pneumococcal polysaccharide-protein conjugate vaccine compositions may be formulated with a pharmaceutically acceptable diluent or vehicle, e.g. water or a saline solution. In addition, the pneumococcal polysaccharide-protein conjugate vaccine compositions may further include one or more of the following: a buffer, a preservative or a stabilizer, polysorbate, an adjuvant such as an aluminum compound, e.g. an aluminium hydroxide, 20 an aluminium phosphate or an aluminium hydroxyphosphate, and/or a lyophilization excipient. Inclusion of any one of the above compounds in the pneumococcal polysaccharide-protein conjugate vaccine compositions of the présent invention may be selected as a function ofthe mode and route of administration to a subject in need thereof and may further be based on standard pharmaceutical practices.
In yet another preferred embodiment, the présent invention provides a 24 valent immunogenic composition comprising pneumococcal capsular polysaccharides from serotypes 1, 3, 4, 5, 6A, 6B, 7F, 8,9V, 10A, 14, 18C, 19A, 19F, 23F, 11A, 12F, 15A, 22F, 23A, 23B, 24F, 33F and 35B each individually conjugated to CRMi97, wherein the composition has pH from 4 to 7 and comprise: about 4.4 pg/0.5mL of 6B; about 2.2 to 4 30 pg/0.5mL of ail other polysaccharides; about 40 to 80 pg/0.5mL CRM197; 0.2 to 2 mg/0.5mL of aluminum phosphate; about 1 to 10 mM succinate buffer, about 0.5 to 25% sodium cnioride; 0.002 to 0.2% polysorbate 80; and 4 mg/mL and 10 mg/0.5mL of 2phenoxyethanol.
In yet another preferred embodiment, the présent invention provides a 24 valent 35 immunogenic composition comprising pneumococcal capsular polysaccharides from serotypes 1, 4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F conjugated to CRM197 carrier protein and capsular polysaccharide from serotypes 3, 6A, 8, 10A, 11A, 12F, 15A, 23A, 23B, 24F and 35B conjugated to PsaA, wherein the composition has pH from 4 to 7 and comprise: about 4.4 pg/0.5mL of 6B; about 2.2 to 4 pg/0.5mL of ail other polysaccharides; from 20 to 40 pg/0.5mL CRM197; from 20 to 40 pg/0.5ml_ PsaA; 0.2 to 2 mg/0.5mL of aluminum phosphate; about 1 to 10 mM sodium buffer; about 0.5 to 25% sodium chloride; 0.002 to 0.2% polysorbate 80; and 4 mg/mL and 10 mg/0.5mL of 2phenoxyethanol.
In yet another preferred embodiment, the présent invention provides a 24 valent immunogenic composition comprising pneumococcal capsular polysaccharides from serotypes 1, 3, 4, 5, 6A, 6B, 7F, 8,9V, 10A, 14, 18C, 19A, 19F, 23F, 11A, 12F, 15A, 22F, 23A, 23B, 24F, 33F and 35B each individually conjugated to PsaA , wherein the composition has pH from 4 to 7 and comprise: about 4.4 pg/0.5mL of 6B; about 2.2 to 4 pg/0.5mL of ail other polysaccharides; about 40 to 80 pg/0.5 mL of PsaA; 0.2 to 2 mg/0.5mL of aluminum phosphate; about 1 to 10 mM succinate buffer; about 0.5 to 25% sodium chloride; 0.002 to 0.2% polysorbate 80; and 4 mg/mL and 10 mg/0.5mL of 2phenoxyethanol.
In some embodiments, the présent invention provides a method for preparing a 24 valent pneumococcal polysaccharide-protein conjugate composition comprising pneumococcal polysaccharides selected from serotypes 1, 3, 4, 5, 6A, 6B, 7F, 8,9V, 10A, 14, 18C, 19A, 19F, 23F, 11A, 12F, 15A, 22F, 23A, 23B, 24F, 33F and 35B wherein the carrier protein is CRMi97. The method for preparing the 24 valent pneumococcal polysaccharide-protein conjugate composition comprises the steps of;
(a) individually conjugating each of the twenty-four activated pneumococcal polysaccharides to CRM197 carrier protein, (b) diafiltering and purifying the conjugales using size exclusion chromatography, (c) analyzing the purified fractions using SEC-MALLS, pooling fractions containing each of the twenty-four conjugates, and filter sterilizing the monovalent conjugate fractions, and (d) formulating the 24 conjugates obtained in step (c), an adjuvant, one or more excipients, and buffer to préparé the 24 valent pneumococcal polysaccharidê-proiein conjugale composition.
In some embodiments, the présent invention provides a method for preparing a twenly four valent pneumococcal polysaccharide-protein conjugate composition comprising pneumococcal polysaccharides selected from serotypes 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B
IS wherein capsular polysaccharide from serotypes 3, 6A, 8, 10A, 11A, 12F, 15A, 23A, 23B, 24F and 35B are conjugated to PsaA and capsular polysaccharide from serotypes 1,4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F are conjugated to CRM197. The method for preparing the 24 valent pneumococcal polysaccharide-protein conjugate composition comprises the steps of;
(a) individually conjugating polysaccharide from serotypes 3, 6A, 8, 10A, 11 A, 12F, 15A, 23A, 23B, 24F and 35B to PsaA and capsular polysaccharide from serotypes 1,4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F are to CRM197, (b) diafiltering and purifying the conjugates using size exclusion chromatography, (c) analyzing the purified fractions using SEC-MALLS, pooling fractions containing each of the twenty-four conjugates, and filter sterilizing the monovalent conjugate fractions, and (d) formulating the twenty-four conjugates obtained in step (a), an adjuvant, one or more excipients, and buffer into the twenty-four valent pneumococcal polysaccharide-protein conjugate composition.
In some embodiments, the twenty-four-valent pneumococcal polysaccharideprotein conjugate composition may be filtered (e.g., aseptically).
In one embodiment, the pneumococcal polysaccharides are activated utilizing CDAP. In another embodiment, the adjuvant used is aluminum phosphate.
Each conjugate of the 24-valent may be adsorbed separately or together as a mixture onto an aluminium sait such as aluminium hydroxide, aluminium phosphate and the like or mixture of both aluminium hydroxide and aluminium phosphate. The adsorbent may be prepared in situ or may be added during the manufacturing process. The préparation of 24 valent conjugate may be carried out by adding each conjugate to a vessel or container successively or preparing separate solution containing CRM197 conjugates (part 1) and PsaA conjugates (part 2) and adding either part 1 to part 2 or vice versa.
The compositions of the présent invention may be formulated into a unit dose, for example, a unit dose vial, into a multiple dose, for example, a multiple dose vial, or a prefilled syringe. The compositions of the présent invention may further comprise of one or more preservative(s) selected from thiomersal, 2-phenoxyethanol and the like, in an amount which may range from about 4 mg/mL to about 20 mg/mL.
In some embodiments, the présent invention also provides an immunogenic composition (e.g., a vaccine), such as a pneumococcal polysaccharide-protein conjugate composition, administered as a single dose of about 0.5 mL formulated to contain at least the following: about 2.2 to 4.4 pg of two or more pneumococcal polysaccharide serotypes, about 1 pg to about 10 pg of PsaA per serotype, about 2 pg to about 5 pg of CRM197 for each serotype, about 0.2 mg to about 1 mg of an adjuvant (e.g., aluminum phosphate), and one or more excipients (e.g., sodium chloride, and/or a buffer).
Compositions of the présent invention may be administered to a subject in need thereof by any number of conventional routes used in the field of vaccines. For example, compositions of the présent invention may be administered systemically, such as parenterally (e.g. subcutaneously, intramuscularly, intradermally and/or intravenously) or mucosally (e.g., orally and/or nasally).
In some embodiments, the présent invention also provides methods of inducing an immune response in a subject in need thereof to one or more Streptococcus pneumoniae capsuiar polysaccharides conjugated to one or more carrier proteins. The methods for inducing the immune response comprise administering an immunologically effective amount of the compositions described herein to the subject in need thereof.
According to the methods of the présent invention, the subject to whom the compositions described herein is a human, such as an infant (less than about 1 year of âge), a toddler (about 12 months to about 24 months of âge), a young child (about 2 years to about 5 years of âge), an older child (about 5 years to about 13 years of âge), an adolescent (about 13 years to about 18 years of âge), an adult (about 18 years to about 65 years of âge), or an eider (more than about 65 years of âge).
As used herein, an effective amount of the compositions described in the présent disclosure refers to an amount required to elicit an immune response in the subject to which the composition was administered. The immune response is characterized by the presence of one or more Streptococcus pneumoniae antigen-specific antibodies in the host that during a subséquent challenge.
The following examples are provided to illustrate the invention and are mereîy for iilustrative purpose only and should not be construed to limit the scope of the invention. EXAMPLE 1: Préparation of Pneumococcal Capsuiar Polysaccharide-CRMis? Coniugates
Pneumococcal capsuiar polysaccharide-CRMi97 conjugales for pneumococcal serotypes 1, 3, 4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F were prepared as per the procedure described in PCT publication No. WO 2016/207905.
Polysaccharide CRM197 conjugales for pneumococcal serotypes 6A, 8, 10A, 11 A, 12F, 15A, 23A, 23B, 24F and 35B were prepared as per the procedure mentioned below:
a) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 6A with CRM197 protein using CDAP chemistry.
lOOOmg (68.5mL of 14.6mg/mL concentration) mechanicaliy size reduced polysaccharide serotype 6A and 5.0mL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:0.5(PS: CDAP) and stirred for 1 minute. The pH of the polysaccharide solution was adjusted to 9.0 with 8.0mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). lOOOmg of CRM197 (66.7mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:1.0 (PnPs: CRM).
The pH of the reaction was adjusted to 9.0 with 1 .OmL of 0.2M triethylamine and the reaction was continued under stirring for 3 - 5 hours at room température followed by quenching of the réaction by adding excess concentration of glycine (100 mM). The conjugation kinetics (Figure 2A) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugales were pooled and stérile filtered with 0.2 pm filters.
b) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 8 with CRM197 protein using CDAP chemistry.
1000mg (200.OmL of 5.0mg/mL concentration) mechanicaliy size reduced polysaccharide serotype 8 and 4.0mL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a gïass bottle in the ratio of 1.0:0.4 (PS: CDAP) and stirred for 1 Min. The pH of the polysaccharide solution was adjusted to 9.0 with 7.7mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 800mg of CRMigz (53.33mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.8 (PnPs: CRM).
The pH of the reaction was adjusted to 9.0 with 1,5mL of 0.2M triethylamine and the reaction was continued under stirring for 3 - 5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 3A) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2 pm filters.
c) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 10A with CRMisr protein using CDAP chemistry.
1000mg (142.8mL of 7.0mg/mL concentration) mechanically size reduced polysaccharide serotype 10A and 8.0 mL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:0.8 (PS: CDAP) and stirred for 1 Min. The pH of the polysaccharide solution was adjusted to 9.0 with 13.0mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 900mg of CRM197 (60,0mL of 15,0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.9 (PnPs: CRM).
The pH of the reaction was adjusted to 9.0 with 2.5mL of 0.2M triethylamine and the reaction was continued under stirring for 3 - 5 hours at room température followed by quenching ofthe reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 4A ) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugales were pooled and stérile filtered with 0.2 pm filters.
d) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 11A with CRM197 protein using CDAP chemistry.
1000mg (125.0mL of 8.0mg/mL concentration) mechanically size reduced polysaccharide serotype 11A and 5.0mL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:0.5 (PS: CDAP) and stirred for 1 minute. The pH of the polysaccharide solution was adjusted to 9.0 with 10.0mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 1000mg of CRMig- (66.7mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:1.0 (PnPs: CRM).
The pH of the reaction was adjusted to 9.0 with 2.5mL of 0.2M triethylamine and the reaction was continued under stirring for 3 - 5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 5A) of reactions were monitored using SEC- HPLC at each hourofthe reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugales were pooled and stérile filtered with 0.2 pm filters.
e) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 12F with CRMw protein using CDAP chemistry.
1000mg (100.OmL of lO.Omg/mL concentration) mechanicaîly size reduced polysaccharide serotype 12F and 5.0mL of CDAP (100 mg/mL in Acetonitrile (w/v)) was mixed in a glass boitte in the ratio of 1.0:0.5 (PS: CDAP) and stirred for 1 minute. The pH of the polysaccharide solution was adjusted to 9.0 with 10.6mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 800mg of CRM197 (53.3mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.8 (PnPs: CRM).
The pH of the reaction was adjusted to 9.0 with 1 .OmL of 0.2M triethylamine and the reaction was continued under stirring for 3-5 hours at room température followed by quenching of the réaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 6A) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2 pm filters.
f) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 15A with CRM197 protein using CDAP chemistry.
1000mg (66.7mL of 15.0mg/mL concentration) mechanicaîly size reduced polysaccharide serotype 15A and 10.OmL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a glass bottie in the ratio of 1.0:1.0 (PS: CDAP) and stirred for 1 minute. The pH of the polysaccharide solution was adjusted to 9.0 with 18.OmL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 1000mg of CRMig? (53.3mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.8 (PnPs: CRM).
The pH of the reaction was adjusted to 9.0 with 1.0mL of 0.2M triethylamine and the reaction was continued under stirring for 3-5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 7.A) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0,2pm filters.
g) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 23A with CRMist protein using CDAP chemistry.
1000mg (83.3mL of 15.0mg/mL concentration) mechanicalïy size reduced polysaccharide serotype 23A and 10.0mL of CDAP (100 mg/mL in Acetonitrile (w/v)) was mixed in a glass bottie in the ratio of 1.0:1.0 (PS: CDAP) and stirred for 1 minute. The pH of the polysaccharide solution was adjusted to 9.0 with 14.9mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 800mg of CRM197 (53.3mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.8 (PnPs: CRM).
The pH of the reaction was adjusted to 9.0 with 1.7mL of 0.2M triethylamine and the reaction was continued under stirring for 3-5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 8A) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane, The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2pm filters.
h) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 23B with CRM197 protein using CDAP chemistry.
1000 mg (100.0mL of 10.0mg/mL concentration) of mechanicalïy size reduced polysaccharide serotype 23B and 2.0 mL of CDAP (1 OOmg/mL in Acetonitrile (w/v)) was mixed in a glass bottie in the ratio of 1.0:0.2 (PS: CDAP) and stirred for 1 Min. The pH of the polysaccharide solution was adjusted to 9.0 with 3.5mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). lOOOmg of CRMig- (66.7mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:1.0 (PnPs: CRM).
The pH of the reaction was adjusted to 9.0 with 2.2mL of 0.2M triethylamine and the reaction was continued under stirring for 3 - 5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 9A) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2 pm filters.
i) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 24F with CRMts? protein using CDAP chemistry.
1000 mg (100.0 mL of 10.0mg/mL concentration) of mechanically size reduced polysaccharide serotype 24F and 5.0mL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:0.5 (PS: CDAP) and stirred for 1 Min. The pH of the polysaccharide solution was adjusted to 9.0 with 10.6mL of 0.2M triethylamine and stirred for 1 Min at room température (RT). 800mg of CRM197 (53.3mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.8 (PnPs: CRM).
The pH of the reaction was adjusted to 9.0 with 1.0mL of 0.2M triethylamine and the reaction was continued under stirring for 3 - 5 hours at room température followed by quenching of the réaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 10A) of reactions were monitored using SEC- HPLC ateach hourofthe reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane, The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugales were pooled and stérile filtered with 0.2pm filters.
j) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 35B with CRM197 protein using CDAP chemistry.
1000mg (lOO.OmL of 10.0mg/mL concentration) mechanically size reduced polysaccharide serotype 35B and 5.0mL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a giass bottle in the ratio of 1.0:0.5 (PS: CDAP) and stirred for 1 minute. The pH of the polysaccharide solution was adjusted to 9.0 with 5.0mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 1000mg of CRM197 (66.7mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:1.0 (PnPs: CRM).
The pH of the reaction was adjusted to 9.0 with 1,6mL of 0.2M triethylamine and the reaction was continued under stirring for 3-5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 11 A) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analysed by SEC-MALLS, anthrone method and fractions containing conjugales were pooled and stérile filtered with 0.2pm filters.
EXAmPLE 2: Préparation of Pneumococcal Capsular Polysaccharide-PsaA Conjurâtes
A) PsaA Préparation:
The PsaA gene was PCR amplified from Streptococcus pneumoniae Serotype 4, without its hydrophobie leader peptide sequence. The gene sequence was verified and cioned into Escherichia coii using a vector constructed in-house (pBE66) for higher expression.
Glycerol stock culture encoding the PSaA gene was revived on a 20 mL LB Media containing 1 mL of Glycerol Stock in a 150 mL conical flask. The culture was incubated for about 6 hrs at 37° C under 200 rpm to a final OD œonm of 3.5 OD. The revived culture was transferred to I L seed culture in a 5 L conical flask. The culture was grown for about 10 hrs at 37° C under 200 rpm to a final CD 600nm of 3. The seed culture was transferred aseptically to a 20 L fermenter containing the following media components, HyPeptone 6 g/L , Yeast extract 12/L, di Potassium Hydrogen ortho phosphate 13.5 g/L , ammonium phosphate di basic 4 g/L, Citric acid 1.7 g/L, MgSO4.7H2O1.2 g/L, Glucose 4 g/L , thamine HCL 10 mg/L along with 1 mL/L trace éléments (e.g., trace éléments for 100mL composition FeCI32.7 g, ZnCLO-Sg, COCI2-6H2O 0.2g, Na2MoO4.2H2O 0.2 g, CuSO4 5H2O 0.1 g, Boric Acid 0.05 g, CaCfe 2H2O 0.1g, Conc., HCL 10mL.) The initial fermentation started with ODe.oonm 0.2 OD. The pH was maintained at 7± 0.2 throughout the fermentation with 20% ortho-phosphoric acid and 12.5% ammonium hydroxide. When the glucose level falls below 0.5 g/L the feed batch was înitiated at a steady rate of 3 - 4 g/L/hr, the DO% was maintained > 20% throughout the fermentation with oxygen enrichment. Cells were grown in the fermenter and the cell pellet was harvested by centrifugation. The cells were lysed using cell-disruption device (Panda). The lysate was centrifuged at 10000g, the clarified supematant was subject to purification.
PsaA purification was performed similar to the procedure described in Larentis et.al, 2011 (Protein expression and Purification 78 (2011) 38). Purification was further optimized by using mixed mode chromatography (Ceramic Hydroxyapatite Type-il) after DEAE to achieve higher purity of PsaA.
Anion exchange chromatography: 30 mL of DEAE Sepharose (GE) resin was packed in XK16/20 column. The resin was washed with 5 column volumes of stérile distilled water followed by 10 column volumes of 20mMTris, 1mM EDTA, p’ri 8.0 (Equilibration buffer). 30 mL of supematant was diluted to 100 mL with équilibration buffer and loaded onto column and flow through was coltecied. The column was washed with 5 volumes of équilibration buffer. PsaA was eluted wîth 12 volumes of linear gradient of (0-100%B). (Buffer A containing 20 mM Tris, 1 mM EDTA pH 8.0; Buffer B-20 mM Tris, 1 mM EDTA,
250 mM NaCl pH 8.0.) This was followed by washing the columns with 20 mM Tris, 1mM EDTA, 1 M NaCl pH8.0.
Mixed mode Chromatography: 25mi of Ceramic Hydroxyapatite Type II (CHT-II) was packed in column. The resin was washed with volumes of stérile distilled water followed by 10 volumes of 20 mM Tris pH 6.8. Elution fractions from DEAE resin that showed clear major visible band of approximately 37 KD good concentration of PsaA on SDS PAGE were pooled and loaded onto CHT-IÎ resin. The flow through was collected and the column was washed with 5 column volumes of équilibration buffer. Protein was eluted with 5 column volumes step gradients of (15%B, 20%B, 50%B and 100%B). Buffer A contains 20 mM Tris pH 6.8, while the Buffer B contains 250 mM Phosphate buffer pH 6.8.
AH the elution fractions showing a clean band at the expected size of PsaA were pooled, concentrated by 10 kDa MWCO cassette and diafiltered against 20mM Phosphate buffer pH 7.5. The purified protein was loaded on SDS-PAGE gel to assess purity.
B) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 3 with PsaA
The size reduced polysaccharide of serotype 3 (concentration of 5 mg/mL) and 1.5 mL of CDAP (100 mg/mL in acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1:0.5 (PS: CDAP) and stirred for 1 minute. The pH of the polysaccharide solution was adjusted to 9.0 with 3.5 mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 210 mg of PsaA (14.0 mL of 15.0 mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1:0.7 (PnPs: PsaA).
The pH of the reaction was adjusted to about 9.01 with 0.7 mL of 0.2M triethylamine and the reaction was continued under stirring for 5 hours at room température followed by quenching of the reaction by adding excess concentration of glycine (100 mM). The conjugation kinetics (Figure 1 A) of reactions were monitored using SEC-HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugales were pooled and stérile filtered with 0.2 pm filters.
C) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 6A with PsaA
The size reduced polysaccharide Type 6A (concentration of 14.6 mg/mL) and 400 pL of CDAP (100 mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1: 1 (PS: CDAP) and stirred for 1 minute. The pH ofthe polysaccharide solution was adjusted to 9.5 with 800 pL of 0.2M triethylamine and stirred for 1 minute at room température (RT).
mg of PsaA (3.78 mL of 11.0 mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1:1 (PnPs: PsaA).
The pH of the réaction was adjusted to about 9.01 with 0.7mL of 0.2M triethylamine and the reaction was continued under stirring for 5 hours at room température followed by quenching of the reaction by adding excess concentration of glycine (100 mM). The conjugation kinetics (Figure 2B) of reactions were monitored using SEC-HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were anaiyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2pm filters.
D) Activation and Conjugation of Pneumococcai Polysaccharide Serotype 6B with PsaA.
The size reduced polysaccharide Type 6B (concentration of 14.97 mg/mL) and 4.0 mL of CDAP (100 mg/mL in acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1: 2 (PS: CDAP) and stirred for 1 minute. The pH of the polysaccharide solution was adjusted to 9.1 with 8.0 mL of 0.2M Triethylamine and stirred for 1 minute at room température (RT). 340 mg of PsaA (22.66 mL of 15.0 mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1:1.7 (PnPs: PsaA).
The pH ofthe reaction was adjusted to about 9.01 with 0.7mL of 0.2M triethylamine and the reaction was continued under stirring for 5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 1 B) of reactions were monitored using SECHPLC at each hour of the reaction.
The réaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2pm filters.
E) Activation and Conjugation of Pneumococcai Polysaccharide Serotype 8 with PsaA.
1000 mg (200.OmL of 5.0mg/mL concentration) of mechanically size reduced polysaccharide serotype 8 and 4.0 mL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:0.4 (PS: CDAP) and stirred for 1 minute. The pH of the polysaccharide solution was adjusted to 9.0 with 8.0 mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 800mg of PsaA (53.33mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.8 (PnPs: PsaA).
The pH of the reaction was adjusted to 9.0 with 0.1 mL of 0.2M triethylamine and the reaction was continued under stirring for 3 - 5 hours at room température followed by quenching of the réaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 3B) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2pm filters.
F) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 10A with PsaA.
1000 mg (142,8mL of 7.0mg/mL concentration) of mechanically size reduced polysaccharide serotype 10A and 6.0 mL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:0.6 (PS: CDAP) and stimed for 1 minute. The pH of the polysaccharide solution was adjusted to 9.0 with 8.0mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 800mg of PsaA (53.33mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.8 (PnPs: PsaA).
The pH of the reaction was adjusted to 9.0 with 1.3mL of 0.2M triethylamine and the reaction was continued under stirring for 3 - 5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 4B) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2pm filters.
G) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 11A with PsaA.
1000mg (lOO.OmL of 10.0 mg/mL concentration) mechanically size reduced polysaccharide serotype 11A and 8.0mL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:0.8 (PS: CDAP) and stirred for 1 Min. The pH of the polysaccharide solution was adjusted to 9.0 with 14.0mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 800 mg of PsaA (53.3mL of l5.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.8 (PnPs: PsaA).
The pH of the reaction was adjusted to 9.0 with 1.1 mL of 0.2M triethylamine and the reaction was continued under stirring for 3 - 5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 5B) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugales were pooled and stérile filtered with 0.2pm filters.
H) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 12F with PsaA.
1000mg (142.8mL of 7.0mg/mL concentration) mechanically size reduced polysaccharide serotype 12F and 4.0mL of CDAP (100 mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:0.4 (PS: CDAP) and stirred for 1 Min. The pH of the polysaccharide solution was adjusted to 9.0 with 9.0mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 700 mg of PsaA (46.6mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.7 (PnPs: PsaA).
The pH of the reaction was adjusted to 9.0 with 1.7mL of 0.2M triethylamine and the reaction was continued under stirring for 3-5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 6B) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2pm filters.
I) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 15A with PsaA.
1000mg {71.4mL of 14.0mg/mL concentration) mechanically size reduced polysaccharide serotype 15A and 10.0mL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:1.0 (PS: CDAP) and stirred for 1 Min. The pH of the polysaccharide solution was adjusted to 9.0 with 20.5mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 1000mg of PsaA (66.6mL of 15.0mg/mL 30 concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:1.0 (PnPs: PsaA).
The pH of the reaction was adjusted to 9.0 with 0.9mL of 0.2M triethylamine and the reaction was continued under stirring for 3-5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 7B) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2pm filters.
J) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 23A with PsaA.
1000mg (83.3mL of 12.0mg/mL concentration) mechanically size reduced polysaccharide serotype 23A and 10.0mL of CDAP (100 mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:1.0 (PS: CDAP) and stirred for 1 Min. The pH of the polysaccharide solution was adjusted to 9.0 with 20.3mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 600mg of PsaA (40.0mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.6 (PnPs: PsaA).
The pH of the reaction was adjusted to 9.0 with 1.1 mL of 0.2M triethylamine and the reaction was continued under stirring for 3-5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 8B) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2pm filters.
K) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 23B with PsaA
1000mg (lOO.OmL of 10,0mg/mL concentration) mechanically size reduced polysaccharide serotype 23B and 2.0 mL of CDAP (100 mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:0.2 (PS: CDAP) and stirred for 1 min. The pH of the polysaccharide solution was adjusted to 9.0 with 3.0mL of 0.2M triethylamine and stirred for 1 Min at room température (RT). 1000mg of PsaA (66.6mL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide m a ratio of 1.0:1.0 (PnPs: PsaA).
The pH of the reaction was adjusted to 9.0 with 2.4 mL of 0.2M triethylamine and the reaction was continued under stirring for 3-5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 9B) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2pm filters.
L) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 24F with PsaA
1000mg (125,OmL of 8,0mg/mL concentration) mechanicaliy size reduced polysaccharide serotype 24F and 3.0mL of CDAP (100 mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:0.3 (PS: CDAP) and stirred for 1 min. The pH of the polysaccharide solution was adjusted to 9.0 with 10.OmL of 0.2M triethylamine and stirred for 1 Min at room température (RT). 600mg of PsaA (40.OmL of 15.0mg/mL concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:0.6 (PnPs: PsaA).
The pH of the reaction was adjusted to 9.0 with 3.5mL of 0.2M triethylamine and the reaction was continued under stirring for 3-5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 10B) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugates were pooled and stérile filtered with 0.2pm filters.
M) Activation and Conjugation of Pneumococcal Polysaccharide Serotype 35B with PsaA.
lOOOmg (142.8 mL of 7.0 mg/mL concentration) mechanicaliy size reduced polysaccharide serotype 35B and 6.OmL of CDAP (100mg/mL in Acetonitrile (w/v)) was mixed in a glass bottle in the ratio of 1.0:0.6 (PS: CDAP) and stirred for 1 minute. The pH of the polysaccharide solution was adjusted to 9.0 with 7.0 mL of 0.2M triethylamine and stirred for 1 minute at room température (RT). 1000 mg of PsaA (66.6 mL of 15.0 mg/mL 32 concentration) was added slowly to the activated polysaccharide in a ratio of 1.0:1.0 (PnPs: PsaA).
The pH of the reaction was adjusted to 9.0 with 2.2rnL of 0.2M triethylamine and the reaction was continued under stirring for 3-5 hours at room température followed by quenching of the reaction by adding an excess concentration of glycine (100 mM). The conjugation kinetics (Figure 11 B) of reactions were monitored using SEC- HPLC at each hour of the reaction.
The reaction mixture was diafiltered and concentrated using 100 kDa MWCO TFF membrane. The concentrate was purified by size-exclusion chromatography. The fractions were analyzed by SEC-MALLS, anthrone method and fractions containing conjugales were pooled and stérile filtered with 0.2pm filters.
EXAMPLE 3: 24-valent Pneumococcal Capsular Polysaccharide-protein conjugate vaccine composition (Formulation I)
A 24 valent conjugated vaccine (0.5 mL) containing 2.2 pg of each pneumococcal polysaccharide from serotypes 1, 4, 5, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F and 4.4 pg of serotype 6B, conjugated to about 35 pg CRM197; and 2.2 pg of each pneumococcal polysaccharide from serotypes 3, 6A, 8, 10A, 11 A, 12F, 15A, 23A, 23B, 24F and 35B conjugated to about 25 pg of PsaA was prepared in 5 mM succinic acid and about 0.07% w/v polysorbate 20 by adding each conjugate sequentialiy into blending vessel. To the blended solution, aluminum phosphate gel équivalent to 0.5 mg Al3+ per dose of 0.5 mL was added. The pH of the formulation was adjusted to 6.0 using 1N hydrochloric acid and under constant stirring. After 2 hours of blending, the formulated blend was aseptically filled at 0.58 mL fill volume per vial into the 3 mL stérile non-siliconized vials, closed with stérile 13 mm rubber stoppers and sealed with 13 mm stérile pink colored flip off aluminum seals, followed by optical inspection and labelling of filled vials. From the lot, some vials were randomly picked and sent for analyzing the appearance, pH, Osmolality, total poly and protein content (pg/SHD), %Adsorption, aluminum content (mg/SHD) (Single Human Dose).
Table I: Characterization of Formulation (I)
PH Appearance Total Ps (pg/SHD) % Adsorptio n Protein (pg/SHD)
6.1 Whitish Suspension in which minera carrier tends to settle down slowly 52 76 56
Osmolality (mOsmoI/kg) Succinic Acid (pg/SHD) Polysorbate 20 (pg/SHD) Aluminum Content (mg/SHD)
299 260 300 0.52
EXAMPLE 4: 24-valent Pneumococcal Capsular Polysaccharide-protein conjugate vaccine composition (Formulation il)
A 24 valent conjugated vaccine (0.5 mL) containing 2.2 pg of each pneumococcal polysaccharide from serotypes 1,3, 4, 5, 6A, 7F, 8, 9V, 10A, 11A, 12F,14, 15A, 18C, 19A, 19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B and 4.4 pg of 6B, conjugated to 60 pg CRMi97 was prepared in 5 mM succinic acid and about 0.07% w/v polysorbate 20 by adding each conjugate sequentially into blending vessel. To the blended solution, aluminum phosphate gel équivalent to 0.5 mg Al3+ per dose of 0.5 mL was added. The pH of the formulation was adjusted to 6.0 using 1N hydrochloric acid and under constant stirring. After 2 hours of blending, the formulated blend was aseptically filled at 0.58 mL fill volume per vial into the 3 mL stérile non-siliconized vials, closed with stérile 13 mm rubber stoppers and sealed with 13 mm stérile pink colored flip off aluminum seals, followed by optical inspection and labeîiing of filled vials. From the lot, some vials were randomly picked and sent for analyzing the appearance, pH, Osmolality, total poly and protein content (pg/SHD), %Adsorption, aluminum content (mg/SHD) (Single Human Dose).
Table il: Characterization of Formulation (II)
pH Appearance Total Ps (pg/SHD) % Adsorptio n Protein (pg/SHD)
6.0 Whitish Suspension in which minerai carrier tends to settle down slowly 50 78 52
Osmolality (mOsmol/kg) Succinic Acid (pg/SHD) Polysorbate 20 (pg/SHD) Aluminum Content (mg/SHD)
293 275 285 0.51
EXAMPLE 5: Immune response in rabbits immunized with two conjugate vaccines carrying different carrier proteins
In order to evaluate immunogenicity, Rabbits were immunized with the Formulation I and II. The study design consisted of two groups of 7 rabbits each. Animais were immunized with three doses of each formulation. Bleeding and immunization schedule along with the group details are given in table below:
Table III: Assessment of immune response in rabbits to regular and reduced antigen formulation
Formulations / Comparators Group size Immunization schedule Bleeding schedule
Formulation I 7 1, 15 and 29 0, 14, 28 and 36
Formulation II 7
Sérum from the immunized rabbits were collected at specified interval. Serotype spécifie IgG titer levels were estimated in an ELISA, which is adapted from a WHO recommended ELISA to assess sérum antibody titers in human sérum. Antibody titers were estimated as - maximum dilution of the sérum that gave OD450nm value above the cut-off limit. The IgG titer value of pre-vaccinated animal was used to calculate Géométrie Mean Fold Rise (GMFR) in sérum IgG titer. Tne GMFR titer values were pîotted in a graph (Figure 12A& 12B).
Titer is estimated as maximum sérum dilution that produced ELISA OD45onm (Optical Density at the wavelength of 450nm) above the cut-off value (2 x OD450nm observed in preimmune sera; OD value of about 0.1. Géométrie Mean Fold Rise (GMFR) for each serotype was plotted. The sera obtained after 3 dose of immunization (Post dose 3) was used to assess the immunogenicity. Solid black bars indicate pneumococcal polysaccharides conjugated to CRM197, while colored bars indicate pneumococcal polysaccharides conjugated to PsaA.
The sérum IgG titers in rabbits vaccinated with either PCV24 (Formulation I) or PCV24 (Formulation II) were found to be very similar. Except Serotypes 23A and 23B in Formulation I immunized group had slightly lower GMFR response when compared to Formulation IL Most importantly ali rabbits immunized with either Polysorbate containing one carrier protein (CRMig7; Formulation II) or two carrier proteins (CRMig7+PsaA; Formulation I) gave above four-fold rise in GMFR. The four-fold rise in antibody concentration is an acceptance criteria set by WHO for pneumococcal vaccine. Thus, the study shows that there is no négative influence on immune response in presence of another carrier protein on vaccine formulation.
This invention is not intended to be exhaustive or to limit the présent technology to the précisé forms disclosed herein. Although spécifie embodiments are disclosed herein for illustrative purposes, various équivalent modifications are possible without deviating from the présent technology, as those of ordinary skill in the relevant art will recognize. In some cases, well-known structures and functions hâve not been shown and/or described in detail to avoid unnecessarily obscuring the description of the embodiments of the présent technology. Although steps of methods may be presented herein in a particular order, in alternative embodiments the steps may hâve another suitable order. Similarly, certain embodiments of the présent technology disclosed in the context of particular embodiments may be combined or eliminated in other embodiments. Furthermore, while advantages associated with certain embodiments may hâve been disclosed in the context of those embodiments, other embodiments may also exhibit such advantages, and not ail embodiments need necessarily exhibit such advantages or other advantages disclosed herein to fall within the scope of the présent technology. Accordingly, this disclosure and associated technology may encompass other embodiments not expressly shown and/or described herein.
From the foregoing, it will be appreciated that spécifie embodiments of the invention hâve been described herein for purposes of illustration, but that various modifications may 10 be made without deviating from the scope of the invention.
ADVANTAGES OF THE INVENTION
The multivalent pneumococcai conjugate vaccine compositions of the présent invention offer an improved immune response over the naive multivalent pneumococcai 15 vaccines and existing pneumococcai conjugate vaccines.

Claims (14)

  1. Claims:
    Claims:
    1. A 24 valent pneumococcal conjugate vaccine composition comprising capsular polysaccharide from serotypes of Streptococcus pneumoniae conjugated to a carrier protein, wherein the serotypes comprise 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, IIA, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B.
  2. 2, A pneumococcal conjugate vaccine composition as claimed in claim 1, wherein the carrier protein is selected from CRM197 or PsaA or combination of CRM197 and PsaA or combination of CRM197 and Tetanus toxoid or combination of PsaA and Tetanus toxoid or combination of CRM197, PsaA and Tetanus toxoid.
  3. 3. A pneumococcal conjugate vaccine composition as claimed in claim 1, wherein capsular polysaccharide from serotypes of Streptococcus pneumonie 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B are conjugated to carrier protein selected from CRM197, PsaA or a combination thereof.
  4. 4. A pneumococcal conjugate vaccine composition as claimed in claim 1, wherein the vaccine composition is a 24 valent pneumococcal polysaccharide-protein conjugate vaccine composition wherein at least thirteen serotypes are conjugated to CRM197 and remaining serotypes are conjugated to PsaA.
  5. 5. A pneumococcal conjugate vaccine composition as claimed in claim 4, wherein capsular polysaccharide from serotypes 1, 4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F are conjugated to CRM197 and capsular polysaccharide from serotypes 3, 6A, 8, 10A, 11 A, 12F, 15A, 23A, 23B, 24F and 35B are conjugated to PsaA.
  6. 6. A 24 valent pneumococcal conjugate vaccine composition comprising about 2.2 pg of each capsular polysaccharide from serotypes of Streptococcus pneumoniae 1, 3, 4, 5, 6A, 7F, 8, 9V, 10A, 11A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B and about 4.4 μα of polysaccharide from serotype 6B, wherein each capsular polysaccharide from serotypes 1, 4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F are conjugated to about 25 to 40 pg of CRM197 carrier protein and each capsular polysaccharide from serotypes 3, 6A, 8, 10A, 11A, 12F, 15A, 23A, 23B, 24F and 35B are conjugated to about 25 to 40 pg of PsaA.
  7. 7. A 24 valent pneumococcal conjugate vaccine composition comprising about 2.2 to 2.4 pg of each capsular polysaccharide from serotypes of Streptococcus pneumoniae 1, 3, 4, 5, 6A, 7F, 8, 9V, 10A, 11 A, 12F, 14, 15A, 18C,19A,19F, 22F, 23A, 23B, 23F, 24F, 33F and 35B and about 4.4 pg 6B, wherein each capsular polysaccharide is conjugated to about 40 to 80 pg of PsaA or about 40 to 80 pg of CRM197.
  8. 8. A pneumococcal vaccine composition as claimed in any of the preceding daims, wherein:
    (a) one or more of the pneumococcal polysaccharides are fragmented, each fragmented pneumococcal polysaccharide has an average molecular weight less than that of a native pneumococcal polysaccharide and range from about 50 to 1000 kDa, preferably, hâve an average size (Mw) of between 100-1000, 200-800, 250-600, or 300-400, 70-150, or 75-125 kDa:
    (b) the polysaccharide-protein conjugales hâve a molecular weight ranging between 500 kDa to 5000 kDa; 1,000 kDa to 10,000 kDa; 1,500 kDa to 15,000 kDa; 2,000 kDa to 20,000 kDa; 2,500 kDa to 25,000 kDa; or 3,000 kDa to 30,000 kDa;
    (c) the percent ratio of protein to polysaccharide (protein/PS) is of 0.3 to 2.0 protein/PS, preferably, 0.5 to 1.5;
    (d) the pneumococcal vaccine composition comprises of one or more preservative(s) selected from thiomersal, 2-phenoxyethanol, in an amount ranges from about 4 mg/mL to about 20 mg/mL; and/or the pneumococcal vaccine composition further comprises of a pharmaceutically acceptable carrier, a pharmaceutically acceptable diluent, a buffer, a preservative, a stabilizer, an adjuvant, and/or a lyophilization excipient.
  9. 9. A pneumococcal conjugate vaccine composition as claimed in claim 6 or claim 7, wherein serotype 15A has a glycerol content in the range of 5-18% and serotype 35B has a glycerol content in the range of 2-10 %, preferably 2-8%.
  10. 10. A pneumococcal conjugate vaccine composilion as claimed in claim 8, wherein the adjuvant is aluminum phosphate.
  11. 11. A method for preparing a 24 valent pneumococcal polysaccharide-protein conjugate composition as claimed in claim 3, wherein the method comprises the steps of:
    (a) individuaily conjugating one or more of twenty-four activated pneumococcal polysaccharides to carrier protein selected from CRM197 or PsaA, (b) diafiltering and purifying the conjugales using size exclusion chromatography, (c) analyzing the purified fractions using SEC-MALLS, pooling fractions containing each of the twenty-four conjugales, and filter sterilizing the monovalent conjugate fractions, and (d) formulating the 24 conjugales obtained in step (a), an adjuvant, one or more excipients, and buffer to préparé the 24 valent pneumococcal polysaccharideprotein conjugate composition.
  12. 12. A 24 valent immunogenic composition comprising pneumococcal capsular polysaccharides from serotypes 1, 3, 4, 5, 6A, 6B, 7F, 8,9V, 10A, 14, 18C, 19A, 19F, 23F, 11 A, 12F, 15A, 22F, 23A, 23B, 24F, 33F and 35B each individually conjugated to CRM197OS PsaA, wherein the composition has pH from 4 to 7 and comprise: about 4.4 pg/0.5mL of 6B; about 2.2 to 4 pg/0.5mL of ail other serotypes; about 40 to 80 pg/0.5mL CRM197 or PsaA; 0.2 to 2 mg/0.5mL of aluminum phosphate; about 1 to 10 mM succinate buffer; about 0.5 to 2.5% w/v sodium chloride; 0.002 to 0.2% w/v polysorbate 80; and 4 mg/mL and 10 mg/0.5mL of 2-phenoxyethanol.
  13. 13. A 24 valent immunogenic composition comprising pneumococcal capsular polysaccharides from serotypes 1, 4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F conjugated to CRM1S7 and capsular polysaccharide from serotypes 3, 6A, 8, 10A, 11 A, 12F, 15A, 23A, 23B, 24F and 35B conjugated to PsaA, wherein the composition has pH from 4 to 7 and comprise: about 4.4 pg/0.5mL of 6B; about 2.2 to 4 pg/0.5mL of ail other serotypes ; from 20 to 40 pg/0.5 mL CRM197; from 20 to 40 pg/0.5 mL PsaA; 0.2 to 2 mg/0.5mL of aluminum phosphate; about 1 to 10 mM succinate buffer; about 0.5 to 2.5% w/v sodium chloride; 0.002 to 0,2% w/v polysorbate 80; and 4 mg/mL and 10 mg/0.5mL of 2-phenoxyethanol.
  14. 14. Pneumococcal conjugale vaccine composition or an immunogenic composition as claimed in any of the preceding claims, wherein the vaccine or the immunogenic composition is useful for preventing or treating a disease mediated by Streptococcus pneumoniae, such as invasive pneumococcal disease (IPD), in a subject;
    wherein, the subject is a human, such as an infant (less than about 1 year of âge), a toddler (about 12 months to about 24 months of âge), a young child (about 2 years to about 5 years of âge), an older child (about 5 years to about 13 years of âge), an adolescent (about 13 years to about 18 years of âge), an adult (about 18 years to about 6or5 years of âge), or an elder (more than about 65 years of âge);
    and wherein the pneumococcal conjugale vaccine composition is administered to the subject as parenterally (e.g. subcutaneously, intramuscularly, intradermally and/or intravenously) or mucosally (e.g., orally and/or nasally).
OA1202100236 2018-10-12 2019-10-11 Multivalent pneumococcal polysaccharide-protein conjugate vaccine. OA20315A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN201841038835 2018-10-12

Publications (1)

Publication Number Publication Date
OA20315A true OA20315A (en) 2022-05-10

Family

ID=

Similar Documents

Publication Publication Date Title
JP7403576B2 (en) Multivalent pneumococcal vaccine composition comprising a polysaccharide-protein conjugate
KR102486891B1 (en) Polyvalent pneumococcal polysaccharide-protein conjugate composition
JP6808658B2 (en) Multivalent pneumococcal conjugate vaccine
US12048739B2 (en) Purified capsular polysaccharides of Streptococcus pneumoniae
US20220143166A1 (en) Multivalent pneumococcal polysaccharide-protein conjugate vaccine
JP2020533299A (en) Formulation method of Streptococcus pneumoniae polysaccharide for conjugation to carrier protein
JP2020533437A (en) Its use in pneumococcal polysaccharides and immunogenic polysaccharides-carrier protein conjugates
JP2020533439A (en) Its use in pneumococcal polysaccharides and immunogenic polysaccharides-carrier protein conjugates
JP2022515098A (en) Compositions Containing Streptococcus pneumoniae Polysaccharide-Protein Conjugates and Methods of Use
WO2020157772A1 (en) Multivalent pneumococcal polysaccharide-protein conjugate vaccine compositions
WO2020152706A1 (en) Multivalent pneumococcal conjugate vaccine compositions
OA20315A (en) Multivalent pneumococcal polysaccharide-protein conjugate vaccine.
US20230101892A1 (en) Multivalent pneumococcal vaccine compositions comprising polysaccharide-protein conjugates
EA047156B1 (en) MULTIVALENT VACCINE BASED ON PNEUMOCOCCAL POLYSACCHARIDE-PROTEIN CONJUGATE
OA20178A (en) Purified capsular polysaccharides of streptococcus pneumoniae.
EA040051B1 (en) POLYVALENT PNEUMOCOCCAL VACCINE COMPOSITIONS CONTAINING POLYSACCHARIDE-PROTEIN CONJUGATES
OA19223A (en) Multivalent pneumococcal vaccine compositions comprising polysaccharideprotein conjugates.