WO2023272370A1 - Composição de vacina veterinária contra helmintos, método para tratamento e prevenção de infecção causada por helmintos e uso - Google Patents
Composição de vacina veterinária contra helmintos, método para tratamento e prevenção de infecção causada por helmintos e uso Download PDFInfo
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- WO2023272370A1 WO2023272370A1 PCT/BR2022/050243 BR2022050243W WO2023272370A1 WO 2023272370 A1 WO2023272370 A1 WO 2023272370A1 BR 2022050243 W BR2022050243 W BR 2022050243W WO 2023272370 A1 WO2023272370 A1 WO 2023272370A1
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- A61P33/10—Anthelmintics
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- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/43504—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from invertebrates
- C07K14/43536—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from invertebrates from worms
- C07K14/43559—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from invertebrates from worms from trematodes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Definitions
- the present invention relates to a veterinary vaccine composition based on fatty acid binding proteins (Fatty Acid Binding Proteins, FABPs) of parasites.
- FABPs fatty Acid Binding Proteins
- the invention features a veterinary vaccine composition based on the rSm14 protein from Schistosoma mansoni or or homologous proteins from Fasciola hepatica (FhFABPs) that provide a homogeneous and long-lasting immune response against helminths.
- the invention also aims to provide a method for treating and preventing infection caused by helminths, particularly Fasciola hepatica, as well as the use of these proteins in a vaccine composition against helminths.
- Vaccines are used to prevent disease in animals.
- the effectiveness of a vaccine depends on many variables, such as the nature and amount of antigen administered and, especially, the presence of adjuvants to enhance immunogenicity.
- the digenetic flukes comprise more than 100 families. Most of them are relatively non-aggressive parasites that live in the gut and other organs of vertebrates and, consequently, have received little attention from parasitologists who make use of applied parasitology. Those flukes that cause serious illness in man are the bloodstream flukes the Schistosomas and the liver and lung flukes which are very important parasites that infect animals.
- Fasciola which is the most important liver fluke, is the preferred parasite in domestic ruminants and is responsible for serious economic losses worldwide as it affects cattle, sheep and goats.
- the main characteristic of the disease is based on the destruction of the hepatic tissue of the host as a result of the damage caused to the bile ducts where the adult specimen of Fasciola lives.
- THE Morbidity is high in young animals that are especially infected by Fasciola hepatica and die as a result.
- Fasciola on some occasions, can also parasitize humans, when there is an opportunity for them to come into contact with the habitat of the animal disease, and this is more frequent in Cuba and in some Latin American countries.
- the real human liver fluke is another parasite, called Clonorchis sinensis, which is widespread in China, Japan, Korea, Vietnam, and India.
- the pathology is basically caused by the thickening of the walls of the bile ducts and, in more severe cases, cause cirrhosis of the liver and death.
- Fasciola and Clonorchis enter the host passively as a larval form called metacercariae ingested with food (grass and raw fish for Fasciola and Clonorchis, respectively), but their route of migration in the vertebrate host organism is through the ducts bile and differ from each other. While Clonorchis gains the biliary tree through the intestine and through the ampulla of Vater, Fasciola migrates through the abdominal cavity actively penetrating the liver wall through its capsule, gaining the parenchyma and then the biliary system causing serious damage to host tissues.
- Fasciola gigantica is another fluke so closely related to F. hepatica in terms of genetics, behavior, and morphological and anatomical structures that it is notoriously difficult to tell them apart. These worm species infect the liver of many mammals, including humans. Fascioliasis is one of the most important diseases of ruminant animals and affects millions of people, inducing chronic liver pathologies.
- Adjuvants are generally defined as compounds that can enhance and/or modulate the intrinsic immunogenicity of an antigen. Adjuvants are therefore needed to help new vaccines induce potent and persistent immune responses. In addition, adjuvants need to offer advantages, including more heterologous antibody responses, encompassing diversity of pathogens, induction of potent functional antibody responses, ensuring the killing or neutralization of pathogens and induction of more effective T cell responses, for direct and indirect pathogens, particularly the induction of cytotoxic T cells that are part of a Th1 immune response.
- the aqueous phase contains:
- aqueous vehicle 0 to 10% aqueous vehicle (preferred: saline); and,
- the oil phase contains:
- oily vehicle 50-70% oily vehicle (preferred: mineral oil); and,
- Formulation 3 of document BR102012026503 contains: "a mixture of mineral oil plus Cetyl PEG/PPG-10/1 Dimethicone", in the proportion of 40% water with 60% oil plus surfactant. Formulations 1 and 2 were made with other ingredients for purposes of comparison with formulation 3 which represents the invention described therein. However, despite document BR102012026503 mentioning that its composition contains 0-1% saponin adjuvant, formulation 3 does not contain saponin.
- Fascioliasis which contains adjuvants that, among other safety aspects, induce potent and persistent immune responses.
- the present invention provides a veterinary vaccine composition based on fatty acid binding proteins (Fatty Acid Binding Proteins, FABPs) of parasites.
- FABPs fatty Acid Binding Proteins
- the invention features a veterinary vaccine composition based on the rSm14 protein from Schistosoma mansoni or homologous proteins from Fasciola hepatica (FhFABPs) that provides a homogeneous and long-lasting immune response against helminths.
- the invention also aims to provide a method for treating and preventing infection caused by helminths, particularly Fasciola hepatica.
- Figure 1 shows the titer of total IgG antibodies in individual sera from animals immunized with the different formulations.
- Figure 2 shows the titer of IgG1 and IgG2 antibodies in individual sera from animals immunized with the different formulations.
- Figure 3 shows the mean ELISA readings of anti-rSm14 IgG antibodies in individual sera from the ovine oil formulation comparison experiment (1/2000 dilution).
- Figure 4 shows the titer pool of sera of the experimental groups for IgG anti-Sm14 antibodies.
- Figure 5 shows the analysis by Western Blotting of the recognition of the protein Sm 14 and FhFABP-3 of Fasciola hepatica by the pool of sera from animals immunized with Formula B, time of 42 days (dilution of 1/10 000) .
- Figures 6A and 6B show the mean ELISA readings of anti-Sm14 IgG antibodies in individual sera from cattle immunized with 80ug (Fig. 6A) and 160ug (Fig. 6B) of the rSm14 antigen (1/800 dilution) .
- Figure 7 shows the analysis by SDS-PAGE and Western Blot of the rSm14 protein of Formula B after 20 months of storage at room temperature (22°C).
- Figure 8 shows the rSm14 protein analysis in Formula B stored for one month at different temperatures.
- Figure 9 shows the titer pool of sera for anti-Sm14 IgG antibodies of the time of 42 days of two immunization experiments performed with the same batch of vaccine, with a difference of one year.
- Figures 10A, 10B and 10C show models of the proteins Sm 14, FhFABP-3 and FhFABP-V, structural alignment between them and percentage of identity between the sequences and RMSD between the structures of Sm 14 and the two FABPs of Fasciola hepatica.
- the antigen used in the composition of the veterinary vaccine described herein includes, in a very preferential way, the rSm14 proteins of Schistosoma mansoni or FhFABP-3 and FhFABP-V, the latter two from Fasciola hepatica, homologous to the rSm14 protein.
- the veterinary vaccine formulation of the present invention uses the rSm14 protein as antigen, obtained according to Brazilian patents
- the Brazilian patent PP1100551 (DOC01 is the same as US5730984), granted to one of the inventors named here, provides an antigen to confer protective immunity against helminth infections.
- the antigen of said patent is a recombinant protein with protective activity against infections caused by pathogenic helminths in humans and animals.
- patent PP1100551 teaches obtaining the recombinant form of Sm 14, rSm14, which is a fusion protein with the capsid protein of bacteriophage T7.
- the rSm14 protein contains a polypeptide chain consisting in whole or in part of the amino acid sequence of SEQ ID NO: 1, shown below, with protective antigenicity determined by the formation of discontinuous epitopes that are located primarily at the C-terminal portion of Sm14 .
- SEQ ID NO: 1 - corresponds to the Sm14M20C62 protein
- the Brazilian patent PI0303266 (DOC02, including DOC02-SEQUENCIAS), granted to one of the inventors named here, provides new mutant forms of the Sm 14 protein for the production of larger production volumes of said protein.
- the recombinant Sm 14 proteins (rSm14), obtained according to the patent PI0303266, are defined by the sequences SEQ ID NO:2, SEQ ID NO:3, SEQ ID NO:4, and, SEQ ID NO:5. The aforementioned sequences are presented below.
- SEQ ID NO:2 - corresponds to the Sm14T20C62 protein Met Ser Ser Phe Leu Gly Lys Trp Lys Leu Ser Glu Ser His Asn Phe Asp Ala Val Thr Ser Lys Leu Gly Val Ser Trp Ala Thr Arg Gln lle Gly Asn Thr Val Thr Pro Thr Val Thr Phe Thr Met Asp Gly Asp Lys Met Thr Met Leu Thr Glu Ser Thr Phe Lys Asn Leu Ser Cys Thr Phe Lys Phe Gly Glu Glu Phe Asp Glu Lys Thr Ser Asp Gly Arg Asn Val Lys Ser Val Val Glu Lys Asn Ser Glu Ser Lys Leu Thr Gln Thr Gln Val Asp Pro Lys Asn Thr Thr Val Ile Val Arg Glu Val Asp Gly Asp Thr Met Lys Thr Thr Val Thr Val Gly Asp Val Thr Ala Ile Val Arg Glu Val Asp Gly Asp
- SEQ ID NO:6 has the sequence below: Met Ala Asn Phe Val Gly Ser Trp Lys Leu Glu Gln Ser Glu Asn Met Asp Ala Val Leu Gln Lys Leu Gly lle Asn Val lle Lys Arg Lys Leu lle Thr Ser Ser Lys Pro Glu lle Thr Phe Thr Leu Glu Gly Asn Lys Met Thr Met Lys Thr Val Ser Ala Leu Lys Thr Thr Val lle Ser Phe Thr Phe Gly Glu Phe Lys Glu Thr Ala Asp Gly Arg Thr Val Met Thr Thr Phe Thr Lys Asp Ser Asp Ser Lys lle Ser Gln Val Gln Lys Cys Pro Glu Asn Thr His Val Val Arg Glu Val Thr Gly Gly Lys Met le Ala Thr Val Thr Val Gly Asp Val Lys Ala Val Asn Asn Tyr His Lys Val SEQ ID NO:7 - F
- SEQ ID NO:7 has the sequence below: Met Ser Gly Phe lle Gly Lys Trp Lys Leu Val Asp Ser Arg Asp Phe Asp Lys Val Met Val Glu Leu Gly Val Gly Tyr Met Thr Arg Lys lle Ala Glu Asn Thr Lys Pro Thr Val Thr lle Thr Lys Phe Gly Glu Asp Gly Leu Thr Met Lys Thr Glu Ser Thr Phe Lys Thr Ser Glu lle Ser Phe Gln Phe Gly Val Glu Phe Asp Glu Thr Thr Ala Asp Gly Arg Gln Val Lys Ser Thr Val Thr Lys Asp Ser Asp Tyr Arg lle Thr Gln Val Gln Lys His Pro Asn Ala Asp Thr His lle Val Arg Gln Val Glu Asn Asp Arg Tyr Gln Arg Arg Arg lle Lys His Pro Asn Ala Asp Thr His lle Val Arg
- the present invention can use any of the proteins defined by SEQ ID Nos: 1 to 7.
- sequences SEQ ID NO:6 and SEQ ID NO:7 correspond to FABPs from Fasciola hepatica with greater homology to Sm 14 (Morphew RM, et al. Exploring and Expanding the Fatty-Acid-Binding Protein Superfamily in Fasciola Species J Proteome Res. 2016. 15(9):3308-21 ).
- the proteins initially used in the present invention are those defined by SEQ ID NO:5, SEQ ID NO:6 and SEQ ID NO:7 and were obtained from a strain of Pichia pastoris genetically manipulated, according to the teachings of the patent Brazilian BRP 11005855.
- the steps for the purification process of the recombinant protein expressed in Pichia pastoris comprise the following steps:
- step (b) clarifying the lysate obtained in step (a)
- step (c) loading the clarified lysate onto anion exchange resin and after loading the protein, the protein is eluted by pH shift on the column.
- the Brazilian patent P11005855 teaches the production process of recombinant Sm 14 protein in Pichia pastoris, to be used in the present invention, which consists of:
- step (b) cloning of the gene synthesized in step (a) in the pPIC9K vector, through the BamHI site and reconstituting the Kozak sequence of the AOXI gene before the start codon of the Sm 14 protein, for expression of the Sm 14 protein in intracellular form;
- the production process developed for the Sm 14 protein can be used for the recombinant production of homologous proteins from Fasciola hepatica, such as FABP type 3 and type V (SEQ ID NO: 07 and 08), which have physical- chemical properties similar to the Sm 14 protein (in terms of molecular mass and isoelectric point (pl)).
- the Brazilian patent application BR102017001309 provides a process for producing proteins in recombinant form using a synthetic gene for high protein expression in Pichia pastoris. More specifically, the invention describes the production of protein Sm 14 from Schistosoma mansoni in recombinant form, where a synthetic gene was created for high expression of this protein, a gene that was cloned under the control of two types of promoters from Pichia pastoris: promoter inducible by methanol (AOX1) and constitutive promoter (GAP). With these constructions were strains of Pichia pastoris have been genetically engineered to efficiently produce the vaccine antigen Sm 14. Processes for producing and purifying this protein from P. pastoris cells have also been improved, which can be scaled up for industrial production.
- the protein of interest is the protein with the construct pGAP-9k/Sm14-M20V62, corresponding to SEQ ID NO:5.
- the veterinary vaccine composition of the present invention comprises the antigen and adjuvants.
- saponin comprises surfactant glycosides and can be obtained from plants, and the most effective saponins as adjuvants are those obtained from the South American tree Quillaja saponaria, preferably from the bark of that tree.
- Quillaja saponaria a saponin obtained from Quillaja saponaria
- an extract is obtained which in partially purified form is known as "Quil A", also included within the scope of the invention.
- the W/O emulsion of the invention comprises adjuvants such as saponin or Quil-A, Tris-HCl Buffer, Thimerosal and water.
- the oil phase comprises at least one of Marcol52TM Oil, Cetyl PEG/PPG-10/1 Dimethicone, Span 80 or Tween 80.
- the amount of antigen used in the composition can vary within the range of 50 ug to 200 ug, preferably 80 ug for sheep and 160 for bovine.
- composition of the invention for a dose volume of 2ml, where the aqueous phase corresponds to 40% of the dose (0.8 ml) and the oil phase corresponds to 60% of the dose (1.2 ml ).
- step (b) clarifying the lysate obtained in step (a)
- the purpose of the following example is to evaluate different formulations of the Sm 14 protein to select the one with the best performance in terms of stimulating the immune response.
- Group 2 immunized only with the Sm14 antigen in aqueous solution, served as Formulation control.
- the immunization of Group 3 shows the effect of mineral oil in stimulating the immune response, in an oil-in-water (O/W) formulation.
- Group 4 shows the effect of adding Imiquimod, a Toll Like Recepto 7 (TLR-7) agonist, in the oil formulation.
- Groups 5 and 6 allowed to study the synergism of the addition of Quil-A (fraction derived from saponin) and MDP (Muramyl Dipeptide, NOD receptor agonist).
- Group 7 was immunized with a water-in-oil formulation containing saponin.
- mice were immunized at times of 0 and 28 days. Serum samples were collected every 14 days, up to 98 days after the first dose, to assess the immune response.
- Figure 1 shows the result of the analysis of the titer of total IgG antibodies against the Sm 14 protein.
- Figure 1 we have the titer of IgG antibodies totals in individual sera of animals immunized with the different formulations. The points show the mean of each group with its respective standard deviation.
- Figure 2 shows the IgG1 and IgG2 antibody titers against the Sm 14 protein.
- Figure 2 we have the IgG1 and IgG2 antibody titers in individual sera of animals immunized with the different formulations. The points show the mean of each group with its respective standard deviation.
- the water-in-oil and saponin formulation showed a superior response (by two orders of magnitude) compared to the oil-in-water formulations, in terms of total antibody titer (rectangle) in Figures 1), and of the IgG1 and IgG2 subtypes against the Sm14 protein (rectangle) in Figure 2).
- the fact of having a high response to these two IgG subtypes indicates that this formulation is capable of inducing both humoral and cellular immune responses.
- the water-in-oil formulation with Quil-A/saponin is used in the veterinary vaccine based on the Sm 14 and FhFABP-3 proteins of the present invention.
- EXAMPLE 2 Comparison of water-in-oil oily formulations
- Table 2 Composition of the 2ml dose of the W/O formulations for the vaccine containing the Sm 14 antigen
- Formula C was obtained by simply mixing the components in aqueous solution.
- Figure 3 shows the mean ELISA readings of anti-Sm14 IgG antibodies in individual sera from the experiment comparing oily formulations in sheep (dilution 1/2000). The points show the mean of each group with its respective standard deviation.
- the ELISA values of the times 42 and 56 days of Formulas A and B were at the upper limit of detection. To differentiate the responses of these two formulations, we performed the titration of IgG antibodies in the pool of sera of these groups in times from 0 to 42 days
- Figure 4 shows the titer of the pool of sera of the experimental groups for IgG anti-Sm14 antibodies.
- Figure 5 shows the analysis by Western Blotting of the recognition of the protein Sm 14 and the FhFABP-3 of Fasciola hepatica by the pool of sera of animals immunized with Formula B, time of 42 days (dilution of 1/10-000 ).
- Fascioliasis is especially important for the livestock industry, for this reason the immunization of adult cattle with Formula B was studied.
- Figure 6B shows that increasing the dose volume of Sm14 protein in Formula B, from 2 ml (80ug of Sm14) to 4 ml (160 ug of Sm 14) resulted in a more intense and more homogeneous immune response in cattle.
- Trichloracetide Acid (TCA) to a final concentration of 10% and incubate at -20°C to precipitate the protein.
- the protein thus obtained can be analyzed by SDS-PAGE and Western Blot.
- a vial sample (primary packaging) with Formulation B was kept at room temperature (about 22°C) for 20 months without showing breakage of the emulsion during storage in this condition. After breaking the emulsion, the antigen present in this vaccine was analyzed. Figure 7 shows the result of the analysis.
- Figure 7 is the SDS-PAGE and Western Blot analysis of the Sm 14 protein of Formula B after 20 months of storage at room temperature, where A.- SDS-PAGE; B.- Western Blot. 1.- Control protein, 2.- Protein extracted from emulsion breakage.
- Figure 8 shows the Sm 14 protein analysis in Formula B stored for one month at different temperatures, where A.- SDS-PAGE; B.- Western Blot. 1.- Vaccine stored at room temperature, 2.- Vaccine stored at 4°C, 3.- Vaccine stored at 37°C, 4.- Control. [092] Figure 8 indicates that there were no differences in stability at the three temperatures studied after one month of storage. Again, there was no degradation of the protein, as this phenomenon would show bands of lower molecular mass being recognized by anti-Sm14 antibodies. It is observed, however, the formation of multimeters, which can be generated by treating the breakdown of the emulsion with the organic solvent, or trichloroacetic acid.
- Figure 9 is shown the titer pool of sera for IgG anti-Sm14 antibodies of the time of 42 days of two immunization experiments performed with the same batch of vaccine, with a difference of one year. In both immunization experiments adult sheep were used.
- Figures 10 are intended to demonstrate that there is high structural conservation including immunogenic epitopes between Sm 14 proteins and FABPs from Fasciola hepatica.
- Figure 10A is a cartoon representation of the Sm 14 protein resolved by crystallography (PDB ID 1VYF, in black, left) and models of the structures of FhFABP-3 (grey, center) and FhFABP-V (white, right) constructed by l-TASSER server [J Yang, Y Zhang.
- I-TASSER server new development for protein structure and function predictions, Nucleic Acids Research, 43: W174-W181 , 2015] Highlighted in sphere representation and colored in CPK for conserved residues between the structures of immunogenic peptides 1.1 and 2.1 [Vilar MM , Barrientos F, Almeida M, et al., An experimental bivalent peptide vaccine against schistosomiasis and fascioliasis. Vaccine 2003;22(1): 137-44.
- Figure 10B shows the structural alignment (Match-Align) performed with the UCSF Chimera software [Pettersen EF, Goddard TD, Fluang CC, et al. UCSF Chimera-a visualization system for exploratory research and analysis. J Comput Chem 2004;25(13):1605-12.], showing consensus sequence, qualitative sequence conservation index and amino acid charge variation. Immunogenic peptides 1.1 (highlighted in blue) and 2.1 (highlighted in red) with residues in yellow with representation of spheres in (A).
- Figure 10C shows the percent sequence identity and RMSD between the Sm 14 structures and the two Fasciola hepatica FABPs. The identity between the sequences is around 50%, but showing great structural conservation, with mean square deviation below 0.5 A calculated by the Match-Align algorithm of the UCSF Chimera software.
- composition of the present invention is administered parenterally. Still optionally, the composition of the present invention is administered by parenteral injection. Still optionally, said composition is administered subcutaneously. Still optionally, the composition of the present invention is administered by subcutaneous injection. Optionally, the composition of the present invention is administered orally, including sublingually, sublabial and/or buccally and/or nasally.
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AU2022303622A AU2022303622A1 (en) | 2021-06-29 | 2022-06-28 | Veterinary vaccine composition against parasitic worms, method for treating and preventing infection by parasitic worms, and use |
EP22831085.0A EP4364753A1 (en) | 2021-06-29 | 2022-06-28 | Veterinary vaccine composition against parasitic worms, method for treating and preventing infection by parasitic worms, and use |
CN202280046614.6A CN117979989A (zh) | 2021-06-29 | 2022-06-28 | 针对蠕虫的兽用疫苗组合物、用于治疗和预防由蠕虫引起的感染的方法和用途 |
CA3225555A CA3225555A1 (en) | 2021-06-29 | 2022-06-28 | Veterinary vaccine composition against helminths, method for treatment and prevention of infection caused by helminths and use |
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-
2021
- 2021-06-29 BR BR102021012953-0A patent/BR102021012953A2/pt unknown
-
2022
- 2022-06-28 EP EP22831085.0A patent/EP4364753A1/en active Pending
- 2022-06-28 WO PCT/BR2022/050243 patent/WO2023272370A1/pt active Application Filing
- 2022-06-28 CA CA3225555A patent/CA3225555A1/en active Pending
- 2022-06-28 CN CN202280046614.6A patent/CN117979989A/zh active Pending
- 2022-06-28 AU AU2022303622A patent/AU2022303622A1/en active Pending
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