WO2014129412A1 - 免疫原性ポリペプチド表層発現ビフィズス菌 - Google Patents
免疫原性ポリペプチド表層発現ビフィズス菌 Download PDFInfo
- Publication number
- WO2014129412A1 WO2014129412A1 PCT/JP2014/053560 JP2014053560W WO2014129412A1 WO 2014129412 A1 WO2014129412 A1 WO 2014129412A1 JP 2014053560 W JP2014053560 W JP 2014053560W WO 2014129412 A1 WO2014129412 A1 WO 2014129412A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- amino acid
- acid sequence
- seq
- polypeptide
- peptide
- Prior art date
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/12—Viral antigens
- A61K39/29—Hepatitis virus
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/66—Microorganisms or materials therefrom
- A61K35/74—Bacteria
- A61K35/741—Probiotics
- A61K35/744—Lactic acid bacteria, e.g. enterococci, pediococci, lactococci, streptococci or leuconostocs
- A61K35/745—Bifidobacteria
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/02—Bacterial antigens
- A61K39/05—Actinobacteria, e.g. Actinomyces, Streptomyces, Nocardia, Bifidobacterium, Gardnerella, Corynebacterium; Propionibacterium
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/12—Viral antigens
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
- A61P31/14—Antivirals for RNA viruses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
- A61P37/04—Immunostimulants
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/195—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N7/00—Viruses; Bacteriophages; Compositions thereof; Preparation or purification thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/51—Medicinal preparations containing antigens or antibodies comprising whole cells, viruses or DNA/RNA
- A61K2039/52—Bacterial cells; Fungal cells; Protozoal cells
- A61K2039/523—Bacterial cells; Fungal cells; Protozoal cells expressing foreign proteins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/54—Medicinal preparations containing antigens or antibodies characterised by the route of administration
- A61K2039/541—Mucosal route
- A61K2039/542—Mucosal route oral/gastrointestinal
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/58—Medicinal preparations containing antigens or antibodies raising an immune response against a target which is not the antigen used for immunisation
- A61K2039/585—Medicinal preparations containing antigens or antibodies raising an immune response against a target which is not the antigen used for immunisation wherein the target is cancer
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2770/00—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA ssRNA viruses positive-sense
- C12N2770/00011—Details
- C12N2770/24011—Flaviviridae
- C12N2770/24211—Hepacivirus, e.g. hepatitis C virus, hepatitis G virus
- C12N2770/24234—Use of virus or viral component as vaccine, e.g. live-attenuated or inactivated virus, VLP, viral protein
Definitions
- the present invention relates to an immunogenic polypeptide surface-expressing bifidobacteria, and more specifically, to an immunogenic polypeptide surface-expressing bifidobacteria capable of producing, for example, a hepatitis C vaccine composition.
- HCV hepatitis C virus
- Interferon treatment is mainly performed as treatment for hepatitis C.
- the combination therapy combining pegylated interferon ⁇ and the antiviral drug ribavirin is more effective because the type 1 virus exclusion rate is 50% or less and the treatment period is long and the side effects are heavy. Drug development and treatment need to be established.
- HCV is a positive-strand RNA virus belonging to the Flaviviridae family, and includes four structural protein regions (C-E1-E2-P7) and six nonstructural protein regions (NS2-NS3-NS4A-NS4B-NS5A-NS5B). ).
- NS3 protein has serine protease activity in 1/3 of the N-terminal side, and 2/3 of C-terminal side has RNA helicase activity.
- Non-patent Document 1 the three-dimensional structure of NS3 protein having two protease-helicase activities has been investigated.
- Non-patent Document 2 NS3 specific strong immune response was observed in patients with cured HCV infection.
- NS3 protein is genetically highly conserved, and numerous cytotoxic T cell (CTL) epitopes have been identified (Non-patent Document 3).
- CTL cytotoxic T cell
- Patent Document 1 describes a polypeptide comprising or consisting of at least 8 consecutive amino acids derived from amino acids 1188 to 1463 of the NS3 region of HCV and comprising a T cell stimulating epitope.
- Patent Document 2 describes that a yeast cell that expresses an HCV fusion protein containing at least a part of HCV NS3 protease linked to at least a part of an HCV core sequence is used as a vaccine base.
- Patent Document 3 describes that a vaccine platform is a bacterium such as attenuated Listeria monocytogenes that expresses and secretes a full-length protein such as NS3 or an immunogenic protein.
- Patent Document 5 An oral vaccine consisting of acid-resistant capsules containing transformed Bifidobacterium longum that expresses or secretes flagellin from Salmonella, Vibrio cholerae, or Shigella dysenteriae.
- the present inventors pay attention to the immunogenicity of non-structural protein 3 (NS3), which is a region related to HCV replication, and design a synthetic polypeptide containing a CD4 epitope and a CD8 epitope derived from NS3 protein.
- NS3 non-structural protein 3
- a bifidobacteria that expresses and displays the HCV antigen polypeptide on the surface, and induces an NS3-specific immune response in an animal orally administered with the HCV antigen polypeptide surface-expressed bifidobacteria (ie, NS3 Induction of specific intestinal mucosal immunity, systemic humoral immunity, and cellular immunity).
- a bifidobacterial surface expression gene that can be widely used for an immunogenic polypeptide can be provided.
- the present invention provides a bifidobacteria surface expression gene for expressing an immunogenic polypeptide on the surface of bifidobacteria,
- the gene comprises a gene encoding the immunogenic polypeptide;
- the immunogenic polypeptide is a hepatitis C virus antigen polypeptide comprising a base domain and at least one antigenic peptide;
- the base domain is (1) a polypeptide comprising the amino acid sequence of SEQ ID NO: 16 or a polypeptide comprising an amino acid sequence having at least 90% sequence identity to the amino acid sequence; (2) a polypeptide comprising the amino acid sequence of SEQ ID NO: 17 or a polypeptide comprising an amino acid sequence having at least 90% sequence identity to the amino acid sequence; (3) a polypeptide comprising the amino acid sequence of SEQ ID NO: 18 or a polypeptide comprising the amino acid sequence having at least 90% sequence identity to the amino acid sequence; and (4) a polypeptide comprising the amino acid sequence of SEQ ID NO: 19
- the base domain is a polypeptide comprising the amino acid sequence of SEQ ID NO: 16 or a polypeptide comprising an amino acid sequence having at least 90% sequence identity to the amino acid sequence, on the N-terminal side of the base domain, QSFLATCINGVCWTVYHGAG (SEQ ID NO: 4) or a region containing a peptide consisting of an amino acid sequence having at least 90% sequence identity with the amino acid sequence is linked, and EIPFYGKAI (SEQ ID NO: 7) or at least 90 with the amino acid sequence is linked to the C-terminal side.
- the base domain is a polypeptide comprising the amino acid sequence of SEQ ID NO: 17 or a polypeptide comprising an amino acid sequence having at least 90% sequence identity to the amino acid sequence, on the N-terminal side of the base domain, QSFLATCINGVCWTVYHGAG (SEQ ID NO: 4) or a region containing a peptide consisting of an amino acid sequence having at least 90% sequence identity with the amino acid sequence
- the base domain is a polypeptide comprising the amino acid sequence of SEQ ID NO: 18 or a polypeptide comprising an amino acid sequence having at least 90% sequence identity to the amino acid sequence, on the N-terminal side of the base domain, QSFLATCINGVCWTVYHGAG (SEQ ID NO: 4) or a region comprising a peptide comprising an amino acid sequence having at least 90% sequence identity with the amino acid sequence is linked, and at the C-terminal side, TPAETSVRLRAYLNTPG (SEQ ID NO: 15) or the amino acid sequence and at least 90 Or (4) the base
- the Bifidobacterium surface layer expression gene further comprises a gene encoding a GNB / LNB substrate-binding membrane protein derived from Bifidobacterium, and the gene encoding the immunogenic polypeptide is derived from the Bifidobacterium. It is located on the 3 ′ end side of the GNB / LNB substrate binding membrane protein.
- the present invention also provides a gene expression plasmid containing the above-mentioned bifidobacteria surface expression gene in a manner capable of expression.
- the present invention further provides a transformed bifidobacteria that retains the above plasmid and displays the immunogenic polypeptide on the cell surface.
- the present invention further provides a transformed bifidobacteria that contains the bifidobacteria surface expression gene in the genome in a manner capable of expression, and presents the immunogenic polypeptide on the cell surface.
- the present invention also provides a hepatitis C vaccine composition comprising a transformed bifidobacteria that presents the hepatitis C virus antigen polypeptide on the cell surface.
- the vaccine composition is an oral vaccine.
- the invention further provides a method of designing an immunogenic polypeptide for expression on the surface of Bifidobacteria, the method comprising: A step of selecting a base domain and at least one antigenic peptide having a three-dimensional structure and having a cell secretory ability; and linking the at least one antigenic peptide to either the N-terminal side or the C-terminal side of the basement domain Designing the synthesized polypeptide.
- the base domain comprises at least one CD4 epitope or CD8 epitope or both.
- the present invention also provides a transformed bifidobacteria that expresses a polypeptide specifically expressed on the surface of cancer cells on the cell surface.
- the transformed bifidobacteria further includes a gene encoding a GNB / LNB substrate-binding membrane protein derived from bifidobacteria.
- the present invention also provides a cancer vaccine containing the transformed bifidobacteria.
- an immunogenic polypeptide can be expressed and presented on the cell surface of bifidobacteria.
- immunity specific to hepatitis C virus antigen is induced in an animal orally administered with bifidobacteria presenting an immunogenic hepatitis C virus antigen polypeptide on the surface layer of bifidobacteria And thus can be utilized as a vaccine composition (eg, an oral vaccine).
- HCV-1b type polypeptide GenBank: BAA08120.1.
- An amino acid sequence as an example of a synthetic NS3 polypeptide in which an NS3-derived antigen peptide is linked to the N-terminus and C-terminus of the base domain based on the NS3 linker site and the N-terminal ⁇ - ⁇ - ⁇ domain of the HCV-1b type polypeptide 1 and 2 are shown. It is a photograph which shows the result of the Western blot regarding the expression of synthetic NS3 protein in wild type Bifidobacterium longum 245, Bifidobacterium longum 2164, and Bifidobacterium longum 2165.
- Bright field micrographs (1-3) of Bifidobacterium longum 245 (1, 4), Bifidobacterium longum 2164 (2, 5), and Bifidobacterium longum 2165 (3, 6) and Fluorescence micrographs (4-6) are shown. It is a graph which shows the daily change of NS3 antigen specific IgA antibody contained in the mouse
- FIG. 2 shows an amino acid sequence which is an example of a synthetic NS3 polypeptide in which an NS3-derived antigen peptide is linked to the N-terminus and C-terminus of the base domain based on the ⁇ -helical domain of NS3 of the HCV-1b polypeptide.
- the amino acid sequence which is an example of a synthetic NS3 polypeptide in which an NS3-derived antigen peptide is linked to the N-terminus and C-terminus of the base domain based on the ⁇ - ⁇ - ⁇ -domain of NS3 of HCV-1b type polypeptide, is shown.
- An amino acid sequence which is an example of a synthetic NS3 polypeptide in which an NS3-derived antigen peptide is linked to the C-terminal of the base domain based on the ⁇ -barrel domain of NS3 in which a part of the NS4A region of the HCV-1b polypeptide is linked to the N-terminus Show.
- the construction of plasmid pBApo-CMVNeo / NS3 / 4A is shown.
- the detection of NS3 / 4A fragment by RT-PCR is shown.
- the detection of NS3 / 4A by Western blotting is shown.
- the effect of NS3 expression bifidobacteria vaccine regarding the growth suppression of EL4 cell which expresses NS3 / 4A is shown.
- Bifidobacteria refers to a microorganism belonging to the genus Bifidobacterium.
- Bifidobacterium for example, Bifidobacterium adolescentis, B. angulatum, Bifidobacterium animalis subsp. Animalis (B. animalis subsp. Animalis), B. animalis subsp. Lactis, B. asteroides, B. bifidum, Bifidobacterium boum ( B. boum), Bifidobacterium breve, B. catenulatum, B.
- B. choerinum Bifidobacterium coryneform (B coryneforme), B. cuniculi ), B. denticolens, B. dentium, B. gallicum, B. gallinarum ), B. globosum, B. indicum, B. infantis, Bifidobacterium inopinatum (B. inopinatum), B. lactis, B. longum, B. magnum, B. merycicum , Bifidobacterium minimum (B. minimum), Bifidobacterium pervulorum, Bifidobacte B. pseudocatenulatum, B. pseudolongum subsp. Globosum, B. pseudolongum subsp.
- B. pseudocatenulatum B. pseudocatenulatum pseudolongum subsp. pseudolongum
- B. pullorum B. ruminale
- B. ruminantium Bifidobacterium sexual (B. saeculare)
- B. scardovii B. subtile
- B. suis Bifidobacterium thermacid film
- B. thermophilum B. thermophilum And the like.
- strains are either commercially available or can be easily obtained from depository institutions.
- B. longum JCM1217 ATCC 15707
- B. bifidum ATCC 11863 Bifidobacterium longum 105-A strain (Biosci. Biotechnol. Biochem., 61) Volume, pages 1211-1212, 1997).
- GNB / LNB substrate binding membrane protein GNB / LNB substrate binding membrane protein
- GNB / LNB substrate binding membrane protein is a lacto-N-biose (ie, N-acetyl-3-O- ( ⁇ -D-galactopyranosyl) -D-glucosamine) and galacto- It is a membrane protein belonging to the ABC protein (ATP Binding Cassette protein) family that transports N-biose (ie, N-acetyl-3-O- ( ⁇ -D-galactopyranosyl) -D-galactosamine).
- ABC protein is an important membrane protein that uses energy called ATP (adenosine triphosphate) and actively transports specific substances on the cell membranes of all living organisms. Is present.
- GLBP which is an ABC protein
- Bifidobacteria Bifidobacterium bacterium having a cell function for GLBP surface expression.
- GLBP derived from Bifidobacterium longum JCM1217 has the amino acid sequence shown in SEQ ID NO: 2 in the sequence listing (the corresponding base sequence is shown in SEQ ID NO: 1).
- GLBP The structure of GLBP is not limited to the naturally occurring GLBP, and if it has the ability to be expressed on the cell surface of bifidobacteria, one or more substitutions (for example, one or several) in the amino acids constituting the GLBP, It may have an insertion or a deletion.
- an immunogenic polypeptide for expression on the surface layer of bifidobacteria is composed of a base domain that retains a three-dimensional structure and has the ability to secrete cells, and at least one antigenic peptide.
- the at least one antigenic peptide is linked to either the N-terminal side or the C-terminal side of the base domain.
- Immunogenic means that the antigen can induce an antigen-specific T cell response (CD4 + and / or CD8 +).
- the base domain retains a three-dimensional structure (for example, forms a secondary structure (for example, ⁇ -sheet or ⁇ -helix) on the crystal structure) and has a cell secretory ability (for example, a continuous basic amino acid) Regions that do not contain or have been modified not to contain residues can be used. Examples of domains that retain a three-dimensional structure include ⁇ - ⁇ - ⁇ domain, ⁇ -barrel domain, ⁇ -helix domain and the like.
- the three-dimensional structure of the protein can be determined, for example, by X-ray crystal structure analysis that is commonly used by those skilled in the art, and the base domain can be selected based on known or estimated X-ray structure analysis information (for example, Protein Data Bank (http://www.rcsb.org/pdb/home/home.do); Bioinformatics, Vol.22, 195-201, 2006; and Protein Science, 2, 305-314, 1993) .
- the base domain preferably comprises at least one CD4 and / or CD8 epitope within the domain.
- Cell secretion ability means that the polypeptide (protein) has the ability to be secreted outside the cell by a transport device on the cell membrane of Bifidobacterium.
- the region does not contain two or more amino acids consecutively in basic amino acids (histidine, lysine, and arginine) (that is, amino acids before and after the basic amino acids in the region Other amino acids) are desirable.
- the region can be modified by substituting with another amino acid as described below.
- Antigenic peptide means any peptide that exhibits antigenicity.
- Peptides that exert antigenicity include CD4 epitope (helper T cell recognition epitope) and CD8 epitope (cytotoxic T cell recognition epitope).
- CD4 epitope helper T cell recognition epitope
- CD8 epitope cytotoxic T cell recognition epitope
- an antigenic peptide has one or more (for example, one or several) substitutions, insertions, and / or deletions in the amino acids constituting the epitope, as long as it has the ability to exert desired properties (particularly antigenicity). May be.
- an antigenic peptide is composed of one or more amino acids (preferably 1-5 amino acids) derived from a region extending to the N-terminus and / or C-terminus of the epitope within the protein from which the epitope is derived (ie, naturally present).
- amino acids preferably within 3 amino acids
- One or more amino acids may be substituted, or a combination thereof may be included.
- the desired action (three-dimensional structure of the base domain) And may be substituted with another amino acid so as to exhibit a secretory capacity. It is not necessary to replace all basic amino acids that are continuous for two or more amino acids, and the remaining amino acids may be replaced except for one basic amino acid.
- the amino acid after substitution may be other than basic amino acids, for example, alanine, methionine, glutamic acid, glutamine and leucine, preferably glutamic acid, glutamine and leucine, more preferably in the order of glutamine and leucine. Can be substituted as arranged.
- the base domain has one or more (for example, one or several) substitutions, insertions, and / or deletions in amino acids as long as it can retain the three-dimensional structure of the domain and has the ability to secrete cells. May be.
- a plurality of types of infrastructure domains may be used.
- amino acid sequence consisting of one or more amino acids (preferably 1 to 5 amino acids) derived from the N-terminal and / or C-terminal region of the base domain in the protein from which the base domain is derived (that is, naturally exists) is further added.
- One or more amino acids preferably within 3 amino acids
- variants having one or more amino acid substitutions, insertions, and / or deletions are preferably conservatively modified variants. “Conservatively modified variants” applies to both amino acid and nucleic acid sequences. Conservatively modified variants for a particular nucleic acid sequence include nucleic acids that encode the same amino acid sequence and amino acid sequences that have one or more conservative substitutions.
- An example of a conservative substitution is the exchange of an amino acid in one of the following groups with another amino acid in the same group: (1) Hydrophobicity: isoleucine, valine, leucine, phenylalanine, methionine, alanine, tryptophan, glycine; (2) Neutral hydrophilicity: cysteine, serine, threonine, asparagine, glutamine, tyrosine; (3) Acidity: aspartic acid, glutamic acid; (4) Basic: histidine, lysine, arginine; (5) Residues affecting chain orientation: glycine, proline; (6) Aromatic: tryptophan, tyrosine, phenylalanine; and (7) Small amino acids: glycine, alanine, serine.
- the amino acid sequence of such a variant is at least 90%, more preferably at least 95%. More preferably, it has at least 99% sequence identity.
- the terms “percent sequence identity” and “% sequence identity” mean the percentage of sequence identity found by comparison or alignment of two or more amino acid or nucleic acid sequences. Percent identity is a direct comparison of sequence information between two molecules by aligning the sequences, calculating the exact number of matches between the two aligned sequences, dividing by the length of the short sequence and multiplying the result by 100. Can be determined by The algorithm for calculating percent identity is the Smith-Waterman homology search algorithm (eg, Proteins, 48, 367-376, 2002; Bioinformatics, 17, 327-337, 2001).
- the antigenic peptide can exhibit immunogenicity by being expressed and presented on the surface of bifidobacteria cells in combination with the base domain. At least one antigenic peptide can be added to one or both sides of the N-terminal side and the C-terminal side of the base domain. For example, if more than one antigenic peptide is added, the base domain can add each antigenic peptide on one or both sides.
- the antigen peptide to be linked can be selected so as to exhibit immunogenicity by the epitope by the antigen peptide and the epitope in the base domain.
- HCV hepatitis C virus
- FIG. 1 shows an amino acid sequence (SEQ ID NO: 3) including the full-length NS3 protein region of HCV-1b type polypeptide (GenBank: BAA08120.1).
- the amino acid sequence at positions 1027 to 1657 in FIG. 1 is the entire length of NS3 (in the present specification, unless specifically indicated about the amino acid position number, this is based on the position in the entire length of the HCV-1b polypeptide).
- NS3 protein consists of a ⁇ -barrel domain (positions 1027 to 1195), a linker site (positions 1196 to 1215), two ⁇ - ⁇ - ⁇ -domains (N-terminal domain 1216 to 1350 and a C-terminal domain). 1351 position to 1509 position) and an ⁇ -helical domain (positions 1510 to 1657) (Non-patent Document 1).
- FIG. 1 also shows the distribution of CD8 epitope (indicated by underline in FIG. 1) and CD4 epitope (indicated by double underline in FIG. 1) in the NS3 protein region.
- the CD8 epitope is 1067 to 1086: QSFLATTCINGVCWTVYHGAG (CD8 epitope 1: SEQ ID NO: 4), 1169th to 1177th: LLCPSGHHVV (CD8 epitope 2: SEQ ID NO: 5), 1291 to 1298: ITYSTYGK (CD8 epitope 3: SEQ ID NO: 6), 1372 to 1380: EIPFYGKAI (CD8 epitope 4: SEQ ID NO: 7), 1391 to 1399: LIFCHSKKKK (CD8 epitope 5: SEQ ID NO: 8), 1406 to 1414: KLSALGVNA (CD8 epitope 6: SEQ ID NO: 9), 1435 to 1454: VATALLMTGYTGDFDSVIDC (CD8 epitope 7: SEQ
- HCV hepatitis C virus immunogenic polypeptide
- the hepatitis C virus (HCV) immunogenic polypeptide expressed on the surface of bifidobacteria can include one or more of the above-mentioned base domains (1) to (4) as a base domain.
- the base domains (1) to (4) can be used alone or in combination with one or more other base domains.
- the base domain (1) is, for example, ETTMRSPVFTDNSTPPAVP (positions 1202 to 1220, CD4 epitope 2: SEQ ID NO: 13), ITYSTYKK (positions 1291 to 1298, CD8 epitope 3: SEQ ID NO: 6), and GGCSGGAYDIIICDECHSTDSTSILGIG (positions 1303 to 1330) Position, CD4 epitope 3: SEQ ID NO: 14).
- the base domain (2) includes, for example, TPAETSVRLRAYLNTPG (positions 1531 to 1547, CD4 epitope 4: SEQ ID NO: 15), and GAVQNEVTL (positions 1629 to 1637, CD8 epitope 8: SEQ ID NO: 11).
- the base domain (3) is, for example, EIPFYGKAI (positions 1372 to 1380, CD8 epitope 4: SEQ ID NO: 7), LIFCHSKQL (positions 1391 to 1399, CD8 epitope 5 with KK replaced by QL: SEQ ID NO: 21) , KLSALGVNA (positions 1406-1414, CD8 epitope 6: SEQ ID NO: 9), and VATALLMTGYTGDFDSVIDC (positions 1435-1454, CD8 epitope 7: SEQ ID NO: 10).
- the base domain (4) is, for example, QSFLATTCINGVCWTVYHGAG (positions 1067 to 1086, CD8 epitope 1: SEQ ID NO: 4), LYLVTRHADVPVRRQLGDSR (positions 1130 to 1149, RR in CD4 epitope 1 is replaced by QL: SEQ ID NO: 22 ), And LLCPSGHVV (positions 1169 to 1177, CD8 epitope 2: SEQ ID NO: 5).
- At least one HCV antigen peptide is linked to the N-terminal side and / or the C-terminal side of the base domain.
- the antigenic peptide includes, for example, a peptide comprising an amino acid sequence selected from the group consisting of: QSFLATTCINGVCWTVYHGAG (SEQ ID NO: 4), LYLVTRHADVPVRRRRGDSR (SEQ ID NO: 12), LLCPSGHVV (SEQ ID NO: 5), ETTMRSPVFTDNSTPPAVP (SEQ ID NO: 13), ITYSTYGK (SEQ ID NO: 6), GGCSGGAYDIIICDECHSTDSTSILGIG (SEQ ID NO: 14), EIPFYGKAI (SEQ ID NO: 7), LIFCHSKKKK (SEQ ID NO: 8), KLSALGVNA (SEQ ID NO: 9), VATALLMTGYTGDFDSVIDC (SEQ ID NO: 10), TPAETSVRLRAYLNTPG (SEQ ID NO: 15), and GAV
- the peptide is a CD4 epitope or a CD8 epitope derived from the NS3 protein of the HCV-1b type antigen polypeptide.
- the CD4 epitope and the CD8 epitope are arranged as shown in FIG. 1, but the kind and number of epitopes of the antigen peptide linked to the base domain, the position (N-terminal side or C-terminal side) to be linked to the base domain, and The order of connection in the case where a plurality of terminals are connected is not particularly limited.
- an antigen peptide a region containing an epitope such as the above-mentioned base domains (1) to (4) can also be used.
- the antigenic peptide may overlap with an epitope located in the base domain.
- the antigen peptide to be linked can be selected such that it can exert immunogenicity by an epitope by the antigen peptide and an epitope in the base domain.
- the CD4 epitope or CD8 epitope within the antigenic peptide has one or more (eg, one or several) substitutions, insertions, and / or deletions in amino acids as long as they have the ability to exert antigenicity. May be.
- the antigenic peptide is one or more amino acids (preferably 1 to 5 amino acids) derived from a region extending to the N-terminus and / or C-terminus of the epitope within the NS3 protein from which the epitope is derived (ie, naturally present).
- the antigenic peptide used for the HCV antigen polypeptide for expressing Bifidobacteria surface layer has the ability to exert antigenicity, it is at least 90% with respect to the amino acid sequence of the peptide of the CD4 epitope or CD8 epitope, more preferably At least 95%. More preferably, it may have an amino acid sequence having at least 99% sequence identity.
- the desired action (the three-dimensional structure of the base domain and the cell secretory ability) is exhibited. May be substituted with another amino acid.
- the amino acid after substitution may be other than basic amino acids, for example, alanine, methionine, glutamic acid, glutamine and leucine, preferably glutamic acid, glutamine and leucine, more preferably in the order of glutamine and leucine. Can be substituted as arranged.
- the base domain has one or more (for example, one or several) substitutions, insertions, or deletions in amino acids as long as the three-dimensional structure of the domain can be maintained and the cell secretory ability for surface expression is present. May be.
- a base domain is one or more amino acids (preferably 1 or more) derived from a region extending from the N-terminal and / or C-terminal of the corresponding region in the NS3 protein from which the base domain is derived (ie, naturally present).
- the amino acids of the base domains (1) to (4) At least 90% relative to the sequence, more preferably at least 95%. More preferably, it may have an amino acid sequence having at least 99% sequence identity.
- a region containing QSFLATCINGVCWTVYHGAG (positions 1067 to 1086, CD8 epitope 1: SEQ ID NO: 4) can be linked to the N-terminal side of the base domain, and to the C-terminal side , EIPFYGKAI (positions 1372 to 1380, CD8 epitope 4: SEQ ID NO: 7), KLSALGVNA (positions 1406 to 1414, CD8 epitope 6: SEQ ID NO: 9) and VATALLMTGYTGDFDSVID (positions 1435 to 1454, CD8 epitope 7: SEQ ID NO: 10) ), More preferably a region containing EIPFYGKAI (positions 1372 to 1380, CD8 epitope 4: SEQ ID NO: 7), or EIPFYGKAI (positions 1372 to 1380).
- CD8 epitope 4 SEQ ID NO: 7
- KLSALGVNA positions 1406-1414, CD8 epitope 6: SEQ ID NO: 9
- VATALLMTGYTGDFDSVIDC positions 1435-1454, CD8 epitope 7: SEQ ID NO: 10
- synthetic protein in the case of the base domain (1) are, for example, as shown in amino acid sequences 1 and 2 of FIG. 2 (in FIG. 2, the base domain sequence is shown in upper case letters and the antigen peptide region sequence is shown in lower case letters)
- each of the CD8 and CD4 epitopes is underlined and double underlined).
- a region containing QSFLATCINGVCVCTVYHGAG (positions 1067 to 1086, CD8 epitope 1: SEQ ID NO: 4) can be linked to the N-terminal side of the base domain.
- EIPFYGKAI positions 1372 to 1380, CD8 epitope 4: SEQ ID NO: 7
- KLSALGVNA positions 1406 to 1414, CD8 epitope 6: SEQ ID NO: 9
- VATALLMTGYTGDFDSVIDC positions 1435 to 1454, CD8 Epitope 7: a region comprising at least one of SEQ ID NO: 10) in any order, more preferably, EIPFYGKAI (positions 1372 to 1380, CD8 epitope 4: SEQ ID NO: 7), KLSALGVNA (positions 1406 to 1414, CD8 epitope) 6: SEQ ID NO: 9), and a region containing VATALLMTGYTGDFDSVIDC (positions 1435-1454, CD8 epitope 7: SEQ ID NO: 10) (preferably in this order), which may be antigenic
- a region containing QSFLATCINGVCVCTVYHGAG (positions 1067 to 1086, CD8 epitope 1: SEQ ID NO: 4) can be preferably linked to the N-terminal side of the base domain.
- a region containing TPAETSVRLRAYLNTPG (positions 1531 to 1547, CD4 epitope 4: SEQ ID NO: 15) can be linked to the C-terminal side (as long as they have the ability to exert antigenicity, the amino acids described in the specified SEQ ID NO: A peptide having an amino acid sequence with at least 90%, more preferably at least 95%, more preferably at least 99% sequence identity to the sequence).
- An example of a synthetic protein in the case of the base domain (3) is, for example, as shown in the amino acid sequence of FIG. 9 (in FIG. 9, the base domain sequence is represented in upper case letters, the antigen peptide region sequence is represented in lower case letters, Each of the CD8 epitope and CD4 epitope is underlined and double underlined; bold “QL” indicates the amino acid after substitution).
- the base domain (4) preferably, no antigen peptide is linked to the N-terminal side of the base domain, and ETTMRSPVFTDNSTPPAVP (positions 1202 to 1220, CD4 epitope 2: SEQ ID NO: 13), ITYSTYGK ( 1291 to 1298, CD8 epitope 3: SEQ ID NO: 6) and GGCSGGAYDIIICDECHSTDSTSILGIG (positions 1303 to 1330, CD4 epitope 3: SEQ ID NO: 14) (1) (or the three-dimensional structure of the domain can be retained, As long as it has the ability to secrete cells for surface expression, it has at least 90%, more preferably at least 95%, more preferably at least 99% sequence identity with respect to the amino acid sequence of the base domain (1).
- EIPFYGKAI positions 1372 to 1380, CD8 epitope 4: SEQ ID NO: 7
- KLSALGVNA positions 1406 to 1414, CD8 epitope 6: SEQ ID NO: 9
- VATALMTGGYTGDFDSVIDC 1355.
- An example of a synthetic protein in the case of the base domain (4) is, for example, as shown in the amino acid sequence of FIG. 10 (in FIG. 10, the base domain sequence is represented in upper case letters, the antigen peptide region sequence is represented in lower case letters, Each of the CD8 epitope and CD4 epitope is underlined and double underlined; bold “QL” indicates the amino acid after substitution).
- the immunogenic polypeptide expressed / presented on the surface of bifidobacteria is expressed as a fusion protein with GLBP. This fusion protein is linked in the order of GLBP and the immunogenic polypeptide of interest from the N-terminus.
- the gene for expressing this fusion protein includes a gene encoding the target immunogenic polypeptide and a gene encoding GLBP (also referred to as an immunogenic polypeptide surface expression cassette gene).
- the gene encoding the target immunogenic polypeptide is located on the 3 'end side of the gene encoding GLBP.
- the immunogenic polypeptide surface expression cassette gene may be a fusion gene in which the gene encoding the immunogenic polypeptide of interest is linked to the 3 ′ end side of the gene encoding GLBP, or encodes GLBP
- a gene encoding a linker having an appropriate length may be disposed between the gene to be encoded and the gene encoding the target immunogenic polypeptide.
- a gene encoding GLBP and a gene encoding a target immunogenic polypeptide can be obtained based on known gene sequence or amino acid sequence information, respectively.
- a genomic DNA or cDNA prepared from any bifidobacteria is used as a template, and amplified by polymerase chain reaction (PCR) using a primer pair prepared based on the sequence information of the structural gene of GLBP of the bifidobacteria. obtain. Since there are generally multiple types of genetic code for one amino acid, it may be a gene having a base sequence different from a known base sequence or a base sequence based on a known amino acid sequence.
- the gene encoding GLBP of B. longum is the structural gene of GLBP of Bifidobacterium longum described in Acta Crystallographica Section F., Vol. Available from sequence.
- Bifidobacterium longum chromosomal DNA or cDNA can be used as a template, and amplified by PCR using a primer pair prepared based on sequence information.
- the gene encoding the target immunogenic polypeptide is determined from the designed amino acid sequence based on known or estimated gene sequence information, and the gene sequence encoding the target immunogenic polypeptide is determined.
- an optimized gene sequence can be obtained in consideration of the codon frequency of the host.
- the gene sequences 1 and 2 encoding each of the amino acid sequences 1 and 2 in FIG. 2 which are examples of the synthetic protein based on the base domain (1) are derived from a base sequence optimized based on the codon frequency of bifidobacteria. Become.
- the nucleotide sequences of gene sequences 1 and 2 are as shown in SEQ ID NOs: 25 and 27, respectively (the corresponding amino acid sequences are shown in SEQ ID NOs: 26 and 28, respectively).
- the base sequence of the gene encoding the amino acid sequence of FIG. 8 which is an example of the synthetic protein based on the base domain (2) and optimized based on the codon frequency of bifidobacteria is as shown in SEQ ID NO: 33 (The corresponding amino acid sequence is shown in SEQ ID NO: 34).
- the base sequence of the gene encoding the amino acid sequence of FIG. 9 which is an example of a synthetic protein based on the base domain (3) and optimized based on the codon frequency of bifidobacteria is as shown in SEQ ID NO: 35 (The corresponding amino acid sequence is shown in SEQ ID NO: 36).
- the base sequence of the gene encoding the amino acid sequence of FIG. 10 which is an example of the synthetic protein based on the base domain (4) and optimized based on the codon frequency of bifidobacteria is as shown in SEQ ID NO: 39 (The corresponding amino acid sequence is shown in SEQ ID NO: 40).
- the gene to be encoded can be obtained by, for example, known chemical synthesis.
- the chemical synthesis method include a chemical synthesis method using a DNA synthesizer utilizing the phosphoramidite method.
- primers prepared based on the 5′-end and 3′-end base sequences of the base sequence to be obtained and synthesized from mRNA contained in tissues or cells of various derived organisms or cDNA selected from a cDNA library The above gene can also be obtained by amplifying DNA using PCR as a template.
- a cDNA or a cDNA library synthesized from mRNA contained in tissues or cells of various derived organisms using a DNA or polynucleotide chemically synthesized as a whole or a part thereof as a probe.
- the above gene can also be obtained by performing colony hybridization or plaque hybridization.
- the genes encoding the above proteins can be easily obtained from known amino sequence information.
- the above cDNA library can be obtained by PCR using a synthetic DNA primer having a partial base sequence of the gene encoding the known amino sequence.
- a method for amplifying a target gene from the above, or a gene incorporated in an appropriate vector, and a DNA fragment or synthetic DNA labeled (probe) that encodes part or all of the gene encoding each of the above proteins And a method of sorting by hybridization.
- the gene encoding each protein may be a DNA that hybridizes with the gene obtained as described above under stringent conditions.
- DNA that can hybridize under stringent conditions means DNA obtained by colony hybridization, plaque hybridization, Southern blot hybridization, or the like using the above DNA as a probe. Specifically, hybridization was performed at about 65 ° C. in the presence of about 0.7 to 1.0 M sodium chloride using a filter on which DNA derived from colonies or plaques was immobilized, and then about 0.1 A DNA that can be identified by washing a filter under a condition of about 65 ° C. using a ⁇ 2-fold SSC solution (the composition of a 1-fold SSC solution consists of 150 mM sodium chloride and 15 mM sodium citrate). It is done.
- the hybridizable DNA is a DNA having at least 80% sequence identity with the base sequence of a gene encoding each protein obtained based on the above-mentioned known base sequence information or amino acid sequence information, preferably Include DNA having at least 90% sequence identity, more preferably DNA having at least 95% homology.
- immunogenic polypeptide surface expression cassette gene and bifidobacteria transformation vector Immunogenic polypeptide surface expression cassette gene or the immunogenic polypeptide surface layer from the gene encoding each protein prepared as described above
- a recombinant DNA containing an expression cassette gene is prepared.
- the immunogenic polypeptide surface expression cassette gene is prepared so that the gene encoding the target immunogenic polypeptide is located on the 3 ′ end side of the gene encoding GLBP.
- the recombinant DNA can be an expression vector or a chromosomal integration vector (for example, a homologous recombination vector).
- the plasmid used for the preparation of such a vector is not particularly limited as long as it is a plasmid that can be expressed in bifidobacteria.
- plasmids derived from Bifidobacterium include pTB6, pBL67, pBL78, pNAL8H, pNAL8M, pNAC1, pBC1, pMB1, and pGBL8b.
- Complex plasmids of these plasmids and E. coli plasmids can also be used, and examples thereof include pBLES100, pKKT427, and pRM2.
- a composite plasmid synthesized from a Bifidobacterium longum plasmid and an Escherichia coli plasmid is preferable from the viewpoint of the stability of expression and the ease of preparation of DNA for preparing a transformant.
- the expression vector preferably has a selection marker such as antibiotic resistance or amino acid requirement from the viewpoint of selecting a transformed strain.
- the expression vector is preferably added with a regulatory sequence for the expression of a fusion protein of GLBP and the target immunogenic polypeptide or so as to be advantageous for the expression.
- regulatory sequences include promoter sequences, leader sequences, propeptide sequences, enhancer sequences, signal sequences, terminator sequences, and the like. There are no particular restrictions on the origin of these regulatory sequences as long as they are expressed in bifidobacteria.
- the promoter sequence is not particularly limited as long as it is expressed in bifidobacteria. From the viewpoint of expression efficiency, a Bifidobacterium longum histone-like protein (HU) promoter sequence, LDH promoter, and the like are preferably used.
- HU Bifidobacterium longum histone-like protein
- the terminator sequence of the HU gene is preferably used.
- a leader sequence, a propeptide sequence, an enhancer sequence, a signal sequence, etc. can be arranged as necessary.
- a gene encoding a linker having an appropriate length may be arranged between a gene encoding GLBP and a gene encoding a target immunogenic polypeptide.
- a cloning vector is prepared by introducing a regulatory sequence such as a promoter sequence and a terminator sequence and a selectable marker gene into the above-described plasmid as necessary.
- Selectable markers include spectinomycin (SPr), ampicillin (Ampr), tetracycline (TETr), kanamycin (KMr), streptomycin (STr), neomycin (NEOr) and other antibiotic resistance markers; green fluorescent protein (GFP), Examples include fluorescent markers such as red fluorescent protein (REP); enzymes such as LacZ.
- a linker having a multicloning site downstream of the promoter of the cloning vector.
- the gene (DNA) encoding the fusion protein is incorporated so that the fusion protein can be expressed downstream of the promoter and in frame.
- plasmids for cloning vectors include pBLES100 and pBREM100 (Japanese Patent No. 3642755).
- a vector for expressing the fusion protein on the surface of Bifidobacteria by incorporating the obtained HU promoter sequence, the gene encoding GLBP, and the gene encoding the target immunogenic polypeptide into this plasmid pBLES100 in frame. Is obtained.
- the expression vector obtained by such a method is used for transformation of bifidobacteria.
- Examples of bifidobacteria surface expression vectors include plasmid pJT101 (Patent Document 4 and Non-Patent Document 4), and E. coli-Bifidobacterium shuttle vector pJW241 (Patent Document 4 and Non-Patent Document 4).
- the plasmid pJT101 contains a GLBP gene (SEQ ID NOs: 1 and 2: Patent Document 4 and Non-patent Document 4) derived from Bifidobacterium longum JCM1217 (ATCC 15707), and a target immunogen downstream of the GLBP gene.
- a gene encoding a sex polypeptide can be incorporated in frame.
- a ligated product (immunogenic polypeptide surface expression cassette gene) encoding the GLBP gene incorporated into pJT101 and the immunogenic polypeptide of interest can be excised and incorporated into the E. coli-Bifidobacterium shuttle vector pJW241.
- Recombinant DNA for example, the expression vector prepared as described above, can be introduced into the host bifidobacteria to prepare the transformed bifidobacteria.
- a gene homologous recombination method using a plasmid replicable in bifidobacteria can also be used.
- an immunogenic polypeptide surface expression cassette gene for example, a fusion gene in which a gene encoding an immunogenic polypeptide of interest is linked to the 3 ′ end of a gene encoding GLBP
- a temperature-sensitive plasmid having a homologous site with the bifidobacterial chromosomal gene (a plasmid that does not replicate at a high temperature (eg, 42 ° C. or higher)) can be used (for example, Appl. Microbiol. Biotechnol., 95, 499-509, year 2012).
- an immunogenic polypeptide surface expression cassette gene is inserted between the homologous sites of a temperature-sensitive plasmid having a homologous site with the bifidobacterial chromosome gene, this plasmid is introduced into bifidobacteria and cultured at high temperature.
- bifidobacteria in which the gene of interest is integrated into the chromosome by gene homologous recombination can be selectively cultured.
- any known method can be used for introducing an expression vector for transformation or a plasmid capable of replicating in Bifidobacteria.
- Specific examples include an electroporation method (electroporation method), a calcium phosphate method, a lipofection method, a calcium ion method, a protoplast method, a microinjection method, and a particle gun method.
- an electroporation method it is preferable to use an electroporation method.
- the electroporation method it can be performed under conditions of 0.5 to 20 kV / cm and 0.5 ⁇ sec to 10 msec. For example, it is performed at 2 to 10 kV / cm and 50 ⁇ sec to 5 msec.
- the transformed strain is selected by utilizing the selection marker possessed by the fusion protein expression vector, the property of the plasmid that can replicate in Bifidobacteria (for example, temperature sensitivity), and the like.
- a medium for cultivating the transformed strain a medium suitable for each host microorganism, for example, glucose blood liver (BL) agar medium, De Mann-Logosar sharp (MRS) agar medium, Gifu University anaerobic (GAM) agar Medium, modified GAM (TGAM) agar medium, Briggs agar medium, and yeast extract glucose peptone (YGP) agar medium.
- Antibiotics are added to these media according to the selection marker, or amino acids are deleted or added to obtain a selective pressure.
- the culture conditions are preferably anaerobic culture in which bifidobacteria can be cultured. By culturing under anaerobic conditions, the growth of aerobic bacteria can be prevented.
- the anaerobic condition is in a sealed container that can maintain an anaerobic degree to which bifidobacteria can grow, and examples include conditions that are possible in an anaerobic chamber or an anaerobic box.
- the culture temperature may be any temperature at which bifidobacteria can be cultured, and is usually 4 ° C to 45 ° C, preferably 15 ° C to 40 ° C, more preferably 24 ° C to 37 ° C.
- a transformed bifidobacteria in which not only a vector for displaying a fusion protein of GLBP and a target protein or peptide on the surface but also a vector for displaying a fusion protein of GLBP and a protein having an adjuvant function are simultaneously introduced. May be prepared.
- the introduction of the gene encoding the fusion protein may be confirmed by electrophoresis after extracting the plasmid from the transformed bifidobacteria and treating with the restriction enzyme, or the sequence of the restriction enzyme-treated fragment may be directly sequenced.
- Confirmation of expression of the fusion protein of the obtained transformed bifidobacteria can be performed, for example, by Western blotting.
- the transformed bifidobacteria are lysed using, for example, a nonionic surfactant.
- Nonionic surfactants include polyoxyethylene sorbitan esters (Tween® 20, 40, 60, 65, 80, 85), sorbitan esters (Span® 20, 40, 60, 65, 80). , 85).
- the target immunogenic polypeptide is easily displayed on the surface of bifidobacteria by an immunoantibody method using an antibody against the target protein or peptide and a FITC-labeled anti-IgG antibody against the transformed bifidobacteria. Can be confirmed.
- the immunogenicity of bifidobacteria expressed on the surface of the immunogenic polypeptide is based on antigen-specific IgA antibody (induction of local mucosal immunity) contained in stool, antigen-specific IgG antibody contained in serum (systemic immunity) Induction) as well as induction of intracellular cytokine (eg, interferon ⁇ (IFN- ⁇ )) production by antigen stimulation.
- IgA antibody induction of local mucosal immunity
- serum systemic immunity
- IFN- ⁇ interferon ⁇
- the transformed bifidobacteria in which the surface layer of the target immunogenic polypeptide has been confirmed may be cultured and recovered by a method commonly used by those skilled in the art and used directly in the preparation of the preparation. Or you may dry and use. Drying is performed by a treatment method that allows growth when exposed to growth conditions such as intestinal environment or culture medium by performing low-temperature treatment such as freeze-drying and low-temperature drying.
- the transformed bifidobacteria may be post-treated by a known method. For example, rough purification may be performed by centrifugation or the like. In addition, if desired, after rough purification, it may be dissolved or suspended in a solvent conventionally used in the art such as physiological saline, phosphate buffered saline (PBS), or lactic acid-containing Ringer's solution. Moreover, you may freeze-dry or spray-dry as needed, and you may make it a powdery thing or a granular material.
- a solvent conventionally used in the art
- physiological saline such as physiological saline, phosphate buffered saline (PBS), or lactic acid-containing Ringer's solution.
- PBS phosphate buffered saline
- the vaccine composition of the present invention contains the transformed bifidobacteria as an active ingredient.
- the vaccine composition of the invention can be administered to a patient in an amount that sufficiently induces an appropriate immune response against HCV infection.
- the transformed bifidobacteria can be stored as frozen, lyophilized, suspension, or cell pastes of the live bacteria, or in combination with a solid or gel or liquid medium.
- the dosage form of the administration preparation is not limited, but a powder, a liquid in which the lyophilized powder is suspended, a capsule in which the lyophilized powder is enclosed, and the like are preferable.
- As the capsule for example, an acid-resistant capsule described in Patent Document 5 can be suitably used.
- the administration route is not particularly limited, and examples thereof include oral administration and parenteral administration. Oral administration or nasal administration is preferred, and oral administration is more preferred.
- preparations suitable for oral administration include, for example, granules, fine granules, powders, syrups, solutions, capsules or suspensions.
- preparations suitable for parenteral administration include, for example, injections, drops, inhalants, sprays, suppositories, transdermal absorbents, transmucosal absorbents, and the like.
- liquid preparations for oral administration for example, sugars such as water, sucrose, sorbit, fructose; glycols such as polyethylene glycol and propylene glycol; oils such as sesame oil, olive oil and soybean oil; p-hydroxybenzoic acid Additives for preparations such as preservatives such as acid esters can be used.
- excipients such as lactose, glucose, sucrose and mannitol
- disintegrants such as starch and sodium alginate
- magnesium stearate such as magnesium stearate, talc Lubricants such as polyvinyl alcohol, hydroxypropyl cellulose, gelatin and other binders; fatty acid esters and other surfactants; and glycerin and other plasticizers.
- preparations for intravascular administration such as injections and infusions can be prepared preferably using an aqueous medium isotonic with human blood.
- an injection can be prepared as a solution, suspension or dispersion with an appropriate auxiliary agent using an aqueous medium selected from a salt solution, a glucose solution, or a mixture of a salt solution and a glucose solution according to a conventional method.
- Suppositories for enteral administration can be prepared, for example, using a carrier such as cacao butter, hydrogenated fat or hydrogenated fatty acid.
- the spray uses a carrier that does not irritate the human oral cavity and airway mucosa, and can promote absorption by dispersing the transformed bifidobacteria as an active ingredient as fine particles.
- a carrier for example, lactose or glycerin can be used.
- lactose or glycerin can be used.
- it can be prepared as a preparation in the form of an aerosol or dry powder.
- a preparation for parenteral administration for example, one or more selected from a diluent, a fragrance, a preservative, an excipient, a disintegrant, a lubricant, a binder, a surfactant, a plasticizer and the like
- a diluent for example, one or more selected from a diluent, a fragrance, a preservative, an excipient, a disintegrant, a lubricant, a binder, a surfactant, a plasticizer and the like
- a surfactant for example, one or more selected from a diluent, a fragrance, a preservative, an excipient, a disintegrant, a lubricant, a binder, a surfactant, a plasticizer and the like
- plasticizer for example, one or more selected from a diluent, a fragrance, a preservative, an excipient, a disintegrant, a
- the content of the transformed bifidobacteria in the vaccine composition of the present invention is appropriately determined according to the type or dosage form of the preparation, the age, sex, body weight or disease state of the administration subject, method of administration or intake, timing or time, etc. Can be set.
- the immunogenic polypeptide is an HCV antigen polypeptide (for example, NS3-derived antigen polypeptide)
- the transformed bifidobacteria of the present invention is an effective oral vaccine against HCV infection.
- the vaccine composition containing the immunogenic HCV antigen polypeptide surface-expressing transformed bifidobacteria of the present invention can be used for either prevention or treatment of HCV infection.
- the present vaccine composition can be used in combination with existing interferon therapy and the like.
- the transformed bifidobacteria of the present invention suppressed the growth of tumor cells expressing NS3 / 4A (Example 9, FIG. 14).
- This is considered to mean that the transformed bifidobacteria of the present invention functioned as a vaccine and activated cellular immunity against NS3. That is, by orally administering the bifidobacteria of the present invention, NS3 protein-specific cytotoxic T cells (cytotoxic T lymphocyte; CTL) are induced, and the CTL attacks the tumor cell EL4 expressing NS3 / 4A. It is thought that tumor growth was suppressed. This confirmed that antigen peptide-specific cellular immunity was induced by the oral vaccine containing the bifidobacteria of the present invention.
- CTL cytotoxic T lymphocyte
- the transformed bifidobacteria of the present invention can also be used for the purpose of suppressing the growth of tumor cells.
- administration of B. longum 2165 expressing NS3 protein inhibited the growth of tumors expressing NS3 protein. This is considered to be because NS3 expressed in the surface layer of B. longum 2165 functions as an antigen, induces induction of NS3-specific CTL, and the CTL suppresses the growth of a tumor expressing NS3.
- a tumor-specific cellular immunity is elicited by expressing and administering a polypeptide that is tumor-specifically expressed on the cell surface and not expressed at all in normal cells on the surface of bifidobacteria. It is thought that the growth of is suppressed.
- cancer antigens that are specifically expressed on the surface of the tumor and not expressed at all in normal cells have been reported so far, for example, in MAGE, MART-1, and breast cancer in malignant melanoma HER2 / neu, CEA in colorectal cancer, WT1, NY-ESO-1 and PSMA in various leukemias and various cancers are well known, but not limited thereto.
- the cancer antigen can be identified by in-silico or wet experiments. It is possible to perform primary screening for cancer antigens by identifying genes that are presumed to be expressed on the cell surface in Insilico, creating microarrays, and examining expression patterns.
- Presence or absence of cancer antigen gene expression can be confirmed by preparing mRNA and performing RT-PCR.
- antibodies are prepared and protein expression is performed by methods well known to those skilled in the art, such as Western blotting and ELISA. Can be confirmed.
- cancer antigen proteins are expressed on the cell surface of bifidobacteria and can be used orally for cancer prevention and treatment as a cancer vaccine.
- Example 1 Design of HCV NS3 polypeptide gene for surface expression of bifidobacteria
- NS3 derived antigen peptide at the N-terminal and C-terminal of the base domain based on the NS3 linker site (positions 1196 to 1215) and upstream ⁇ - ⁇ - ⁇ domain (positions 1216 to 1350) of the HCV-1b polypeptide
- Two amino acid sequences shown in FIG. 2 were designed to be linked.
- Amino acid sequence 1 (> 1: SEQ ID NO: 23 in FIG. 2) links a region containing QSFLATCINGVCVCTVYHGAG (positions 1067 to 1086, CD8 epitope 1: SEQ ID NO: 4) to the N-terminal side of the base domain, and the C-terminal side.
- EIPFYGKAI (positions 1372 to 1380, CD8 epitope 4: SEQ ID NO: 7)
- KLSALGVNA positions 1406 to 1414, CD8 epitope 6: SEQ ID NO: 9
- VATALLMTGYTGDFDSVID (positions 1435 to 1454, CD8 epitope 7: SEQ ID NO: 10) are connected in this order.
- Amino acid sequence 2 (> 2 in FIG. 2: SEQ ID NO: 24) links a region containing QSFLATCCINGVCVCTVYHGAG (positions 1067 to 1086, CD8 epitope 1: SEQ ID NO: 4) to the N-terminal side of the base domain, and the C-terminal side. Is linked to a region containing EIPFYGKAI (positions 1372 to 1380, CD8 epitope 4: SEQ ID NO: 7).
- the base domain is a region corresponding to positions 1196 to 1350 of the HCV-1b type antigen polypeptide, and the base domain itself is ETTMRSPVFTDNSTPPAVP (positions 1202 to 1220, CD4 epitope 2: SEQ ID NO: 13), ITYSTYGK (1291) Positions 1298, CD8 epitope 3: SEQ ID NO: 6), and GGCSGGAYDIIICDECHSTDSTSILGIG (positions 1303-1330, CD4 epitope 3: SEQ ID NO: 14).
- Example 2 Preparation of NS3 protein surface expression transformed bifidobacteria
- a gene matched to the codon usage frequency of Bifidobacterium http://www.kazusa.or.jp/codon/
- Sequences 1 and 2 SEQ ID NOs: 25 and 27, respectively; the corresponding amino acid sequences are shown in SEQ ID NOs: 26 and 28, respectively
- the respective gene fragments were totally synthesized (the former “ Long type ", the latter also called” short type "). The total synthesis of gene fragments was commissioned to GenScript.
- the obtained gene fragment was treated with XhoI and SalI, and inserted into a recombinant plasmid pJT101 (Patent Document 4 and Non-Patent Document 4) similarly treated with XhoI and SalI.
- the plasmid pJT101 contains a GLBP gene (SEQ ID NOs: 1 and 2: Patent Document 4 and Non-patent Document 4) derived from Bifidobacterium longum JCM1217 (ATCC 15707). Through the above insertion, a “long” or “short” gene fragment was ligated downstream of the GLBP gene.
- a forward primer (5'-GGAAAACTGTCCATAGATGGCGAGGCGAACGCCACGGT-3 ': SEQ ID NO: 29) and reverse primer (5'-TTTCATCTGTGCATAGTCGACTTCAGGTGTTGCAGTCGA-3': SEQ ID NO :) using a plasmid containing a fusion gene of "long" gene downstream of the GLBP gene as a template PCR was performed using the primer pair of 30).
- a forward primer (5'-GGAAAACTGTCCATAGATGGCGAGGCGAACGCCACGGT-3 ': SEQ ID NO: 29) and reverse primer (5'-TTTCATCTGTGCATATTCACAGCGGGATGGCCTTGCCGTAGA-3': PCR was performed using the primer pair of SEQ ID NO: 31).
- E. coli-Bifidobacterium shuttle vector pJW241 (Patent Document 4 and Non-Patent Document 4) was cleaved with NdeI, and the resulting PCR amplified fragment was cloned into this site by the In-fusion method (Clontech Laboratories, Inc .: Clontech Laboratories, Inc. .).
- the surface expression vector containing the “long” fusion gene thus obtained was named pJW2165, and the surface expression vector containing the “short” fusion gene was named pJW2164.
- the resulting surface expression vector pJW2165 or pJW2164 was introduced into Bifidobacterium longum 105-A strain (Biosci. Biotechnol. Biochem., Vol. 61, pages 1211-1212, 1997) by electroporation. As a result, transformed Bifidobacterium longum was obtained.
- the transformed Bifidobacterium longum introduced with pJW2165 was named Bifidobacterium longum 2165
- the transformed Bifidobacterium longum introduced with pJW2164 was named Bifidobacterium longum 2164.
- Bifidobacterium longum (Bifidobacterium longum 2012) expressing only GLBP was produced.
- Example 3 NS3 protein surface expression of transformed Bifidobacterium longum
- PVDF polyvinylidene fluoride
- each lane is as follows: Molecular weight marker; 1. Wild type Bifidobacterium longum 245; 2. Bifidobacterium longum 2164; Bifidobacterium longum 2165.
- the molecular weight of the GLBP-NS3 fusion protein is 66 kDa for Bifidobacterium longum 2164 and 69 kDa for Bifidobacterium longum 2165, and the position of each band in FIG. 3 is indicated by an arrow.
- Both Bifidobacterium longum 2164 and Bifidobacterium longum 2165 can confirm a band at the target position (lanes 2 and 3, respectively) and express a protein with a molecular weight as designed. I understood.
- Bifidobacterium longum 2164 and Bifidobacterium longum 2165 were immunostained.
- Bifidobacterium longum 2164 and Bifidobacterium longum 2165 cultured anaerobically in GAM medium overnight were washed, diluted with PBS, and blocked with 1% -BSA / PBS at 37 ° C. for 30 minutes. . 50 times diluted rabbit anti-NS3 IgG (operon), 1000 times diluted Alexa Fluor 594 goat anti-rabbit IgG (H + L) (Invitrogen) in the order of 1 hour each at 37 °C Fluorescence development was observed.
- Example 4 Oral administration of transformed Bifidobacterium longum to mice
- the transformed Bifidobacterium longum was anaerobically cultured overnight in GAM medium and diluted with PBS to 5 ⁇ 10 8 CFU / ml. 100 ⁇ l of this bacterial solution was orally administered intragastrically to 8-week-old female BALB / C mice. Administration was performed 3 times a week for 4 weeks.
- a PBS administration group, a wild type Bifidobacterium longum 245 administration group, and a Bifidobacterium longum 2012 administration group expressing only GLBP were used, and administration was performed under the same conditions.
- the tail vein was collected on days 0, 14, and 28, and feces were collected.
- the mice were anesthetized and then euthanized by cervical dislocation, dissected and the spleen removed.
- NS3 antigen-specific IgA antibody contained in stool was detected by enzyme-linked immunosorbent (ELISA) method.
- ELISA enzyme-linked immunosorbent
- Feces were dissolved in 5% skim milk / 0.1 mg / ml soybean trypsin inhibitor / 2 mM phenylmethylsulfonyl fluoride / PBS to prepare a fecal solution.
- a 96-well immunoplate (NUNC) was coated with GST-NS3 antigen peptide and blocked with 5% skim milk / PBS at 37 ° C. for 1 hour.
- FIG. 5 shows the results of ELISA method for examining NS3 antigen-specific IgA antibody contained in stool. Symbols in FIG. 5 are as follows: Black square: PBS administration group; Black triangle: Bifidobacterium longum 245 administration group; Black circle: Bifidobacterium longum 2012 administration group; White triangle: Bifidobacteria Um longum 2164 administration group; and white circle: Bifidobacterium longum 2165 administration group. * Indicates that there is a significant difference at p ⁇ 0.05.
- the Bifidobacterium longum 2165 administration group had a significantly higher absorbance (OD 450) than the PBS, Bifidobacterium longum 245, and Bifidobacterium longum 2012 administration groups. (P ⁇ 0.05). On the other hand, although no significant difference was observed, Bifidobacterium longum 2164 also showed a slightly higher value.
- FIG. 6 shows the result of ELISA method for examining NS3 antigen-specific IgG antibody contained in serum.
- the symbols in FIG. 6 are the same as those in FIG. ** indicates that there is a significant difference at p ⁇ 0.01.
- the amount of IgG antibody increased with time
- PBS Bifidobacterium longum 245, Bifidobacterium longum 2012 on day 14 and 28 The value was significantly higher than that of the administration group (p ⁇ 0.01).
- Bifidobacterium longum 2164 and Bifidobacterium longum 2165 were confirmed to induce local mucosal immunity and systemic immune response by oral administration.
- the spleen was subdivided using a 70 ⁇ l cell strainer (BD), hemolyzed with 0.83% NH 4 Cl / PBS, and then washed.
- the cells were suspended in 10% FBS / RPMI medium to 4 ⁇ 10 5 cells / well and cultured in a 96-well microplate for 3 days while stimulating with 2 ⁇ g of GST-NS3 antigen peptide.
- mouse IFN- ⁇ Quantikine ELISA Kit R & D
- the amount of interferon ⁇ (IFN- ⁇ ) in the culture supernatant of spleen cells was measured.
- Results are shown in FIG.
- the vertical axis in FIG. 7 represents the amount of IFN- ⁇ (pg / ml) in the culture supernatant of spleen cells.
- Bifidobacterium longum 245 administration group Bifidobacterium longum 2012 administration group
- Bifidobacterium longum 2164 administration group Bifidobacterium longum 2165 administration group
- white bar graph represents NS3 antigen stimulation.
- IFN- ⁇ production was increased by antigen stimulation, and a significant difference was observed compared to the non-stimulated control group cultured under the same conditions (p ⁇ 0.01).
- In the Bifidobacterium longum 2164 administration group no significant difference was observed, but the IFN- ⁇ production increased due to antigen stimulation.
- Example 5 Design 2 of HCV NS3 polypeptide gene for surface expression of bifidobacteria
- the amino acid sequence shown in FIG. 8 was designed so that the NS3-derived antigen peptide was linked to the N-terminus and C-terminus of the base domain based on the NS3 ⁇ -helical domain (positions 1510 to 1657) of the HCV-1b type polypeptide.
- the amino acid sequence of FIG. 8 (SEQ ID NO: 32) links a region containing QSFLATCINGVCWTVYHGAG (positions 1067 to 1086, CD8 epitope 1: SEQ ID NO: 4) on the N-terminal side of the base domain, and EIPFYKKAI (1372) on the C-terminal side. Position-1380, CD8 epitope 4: SEQ ID NO: 7), KLSALGVNA (positions 1406-1414, CD8 epitope 6: SEQ ID NO: 9) and VATALLMTGYTGDFDSVIDC (positions 1435-1454, CD8 epitope 7: SEQ ID NO: 10) in this order Concatenate the areas to be included.
- the base domain is a region corresponding to positions 1510 to 1657 of the HCV-1b type antigen polypeptide, and the base domain itself is TPAETSVRLRAYLNTPG (positions 1531 to 1547, CD4 epitope 4: SEQ ID NO: 15), and GAVQNEVTL (1629). Positions 1637, CD8 epitope 8: SEQ ID NO: 11).
- the gene sequence (SEQ ID NO: 33; the corresponding amino acid sequence is SEQ ID NO: 34) matched to the codon usage frequency of Bifidobacterium (http://www.kazusa.or.jp/codon/) Designed).
- Example 6 Design 3 of HCV NS3 polypeptide gene for bifidobacteria surface expression
- the amino acids shown in FIG. 9 are linked so that the NS3-derived antigen peptide is linked to the N-terminus and C-terminus of the base domain based on the ⁇ 3- ⁇ - ⁇ -domain (positions 1351 to 1509) downstream of NS3 of the HCV-1b polypeptide.
- the sequence was designed. In the base domain, 3 amino acids from positions 1351 to 1353 were deleted, and two K (lysine) at positions 1398 to 1399 were replaced with Q (glutamine: 1398 position) and L (leucine: 1399 position).
- the amino acid sequence of FIG. 9 (SEQ ID NO: 35) links a region containing QSFLATCINGVCVCTVYHGAG (positions 1067 to 1086, CD8 epitope 1: SEQ ID NO: 4) to the N-terminal side of the base domain, and TPAETSVRLRAYLNTPG (1531) to the C-terminal side. Position to 1547, the region containing CD4 epitope 4: SEQ ID NO: 15) is linked.
- the base domain itself includes EIPFYGKAI (positions 1372 to 1380, CD8 epitope 4: SEQ ID NO: 7), LIFCHSKQL (positions 1391 to 1399, CD8 epitope 5 with KK replaced by QL: SEQ ID NO: 21), KLSALGVNA (1406 Positions 1414, CD8 epitope 6: SEQ ID NO: 9), and VATALLMTGYTGDFDSVID (positions 1435-1454, CD8 epitope 7: SEQ ID NO: 10).
- the gene sequence (SEQ ID NO: 36; corresponding amino acid sequence is SEQ ID NO: 37) in accordance with the codon usage frequency of Bifidobacterium (http://www.kazusa.or.jp/codon/) Designed).
- Example 7 Design 4 of HCV NS3 polypeptide gene for Bifidobacterium surface expression
- NS3-derived antigenic peptide at the C-terminal of the base domain based on the ⁇ -barrel domain (positions 1027 to 1195) of NS3 in which a part of the NS4A region of the HCV-1b polypeptide (positions 1677 to 1690) is linked to the N-terminus
- the amino acid sequence shown in FIG. 10 was designed so that In the basal domain, the amino acids at positions 1027-1028 and amino acids 1195 are deleted, and the two Rs (arginine) at positions 1144-1145 are replaced by Q (glutamine: position 1144) and L (leucine: position 1145). Replaced.
- the amino acid sequence of FIG. 10 is ETTMRSPVFTDNSTPPAVP (positions 1202 to 1220, CD4 epitope 2: SEQ ID NO: 13), ITYSTYGK (positions 1291 to 1298, CD8 epitope 3: sequence) on the C-terminal side of the base domain. No.
- the NS4A region and the base domain based on the NS3 ⁇ -barrel domain itself include QSFLATCINGVCWCTVYHGAG (positions 1067 to 1086, CD8 epitope 1: SEQ ID NO: 4), LYLVTRHAVDPVRRQLGDSR (positions 1130 to 1149, QR of CD4 epitope 1) ): SEQ ID NO: 22), and LLCPSGHVV (positions 1169 to 1177, CD8 epitope 2: SEQ ID NO: 5).
- the gene sequence (SEQ ID NO: 39; the corresponding amino acid sequence is SEQ ID NO: 40) matched to the codon usage frequency of Bifidobacterium (http://www.kazusa.or.jp/codon/) Designed).
- Example 8 Preparation of transformed EL4 cells for subcutaneous tumor Since mice were not infected with HCV, subcutaneous tumors were created in the mice, and the following experiment was conducted to evaluate the effect of the vaccine of the present invention by its growth inhibitory effect.
- plasmid pSG5 / NS3 / 4A a fragment encoding NS3 / 4A was excised with BamHI and inserted into the BamHI site of plasmid pBApo-CMVCMNeo (TAKARA) to obtain plasmid pBApo-CMV Neo / NS3 / 4A ( FIG. 11).
- This plasmid pBApo-CMV Neo / NS3 / 4A was prepared and introduced into EL4 cells (mouse lymphoma cells) using TransIT-293 Transfection Reagent (manufactured by Takara Bio Inc.).
- Transformed EL4 cells were selected with a medium containing 800 ⁇ g / ml of G418, and a clonal strain of transformed EL4 cells (NS3 / 4A-EL4 cells) was obtained by the limiting dilution method.
- RT-PCR and Western blotting were performed to confirm that the cells were transformed cells.
- RT-PCR is carried out by preparing cDNA from total RNA by a conventional method, using a primer (SEQ ID NO: 41: CGGCCCTCAGGCATGTTCGATTCTTC, SEQ ID NO: 42: CCGGACAAGATGATCCTGCCCACAATG), incubating at 94 ° C. for 120 seconds, 98 ° C., 10 seconds, 30 cycles of 64 ° C, 30 seconds, 68 ° C and 40 seconds were performed to amplify the DNA fragment encoding NS3 / 4A, agarose gel electrophoresis, staining with ethidium bromide, and confirming the amplified DNA fragment under UV (FIG. 12).
- 1 is the plasmid pSG5 / NS3 / 4A
- 2 is the transformed EL4 cell
- 3 is the Mock-infected EL4 cell
- the target band was confirmed in 1 and 2.
- Western blotting was performed by fractionating the cell extract by SDS-PAGE, transferring it to a nylon membrane, blocking, and then detecting NS3 / 4A protein with an antibody (FIG. 13).
- FIG. 13 a 73 kDa NS3 / 4A protein band was detected in transformed EL4 cells (lane 2).
- no NS3 / 4A protein band was detected in control lane 3. This confirmed that it was a clonal strain of NS3 / 4A-EL4 cells.
- Example 9 Examination of antitumor effect by oral administration of B. longum 2165)
- the body weight was measured the day before subcutaneous inoculation (Day 0), and NS3 / 4A-EL4 cells confirmed to be a transformant were transplanted subcutaneously into C57BL / 6N mice.
- NS3 / 4A-EL4 cells confirmed to be a transformant were transplanted subcutaneously into C57BL / 6N mice.
- 1 ⁇ 10 6 cells were embedded in 200 ⁇ l of RPMI1640 & Matrigel and inoculated subcutaneously.
- Day 1 an oral administration experiment of bifidobacteria expressing NS3 / 4A protein on the surface was started.
- the tumor volume was remarkably increased, but in the group administered with 2165 (GLBP-NS3) and inactivated 2165 (GLBP-NS3), the tumor volume was significantly increased. The increase was suppressed.
- GLBP-NS3 gene-expressing bifidobacteria are effective in suppressing the growth of tumor cells that express NS3 / 4A protein on the cell surface. This effect was observed not only in live bacteria but also in inactivated bacteria. Therefore, it is thought that it has an effect as an antigen irrespective of the life and death of bifidobacteria.
- an immunogenic polypeptide can be expressed and presented on the cell surface of Bifidobacterium.
- NS3-specific immunity can be induced in an animal in which bifidobacteria presenting, for example, hepatitis C virus antigen polypeptide is orally administered to the surface layer of bifidobacteria, and thus the vaccine composition (for example, it can be used as an oral vaccine.
- a vaccine composition is expected to increase the cure rate of HCV chronic infection in combination with existing interferon therapy and the like.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Mycology (AREA)
- Immunology (AREA)
- Pharmacology & Pharmacy (AREA)
- Animal Behavior & Ethology (AREA)
- Virology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Organic Chemistry (AREA)
- Epidemiology (AREA)
- Molecular Biology (AREA)
- Genetics & Genomics (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Communicable Diseases (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Gastroenterology & Hepatology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Engineering & Computer Science (AREA)
- Oncology (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Peptides Or Proteins (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
Abstract
Description
該遺伝子は、該免疫原性ポリペプチドをコードする遺伝子を含み、
該免疫原性ポリペプチドが、基盤ドメインおよび少なくとも1つの抗原ペプチドを含むC型肝炎ウイルス抗原ポリペプチドであり、
該基盤ドメインが、
(1)配列番号16のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチド;
(2)配列番号17のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチド;
(3)配列番号18のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチド;および
(4)配列番号19のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチド;
からなる群より選択される1つ以上を含み、
該抗原ペプチドが、配列番号4~15のアミノ酸配列を含むペプチドならびに配列番号4~15のアミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドからなる群より選択される少なくとも1つであり、
該少なくとも1つの抗原ペプチドが、該基盤ドメインのN末端側およびC末端側のいずれかに連結される。
(1)前記基盤ドメインは、配列番号16のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチドであり、該基盤ドメインのN末端側に、QSFLATCINGVCWTVYHGAG(配列番号4)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結し、C末端側に、EIPFYGKAI(配列番号7)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域、あるいはEIPFYGKAI(配列番号7)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド、KLSALGVNA(配列番号9)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド、およびVATDALMTGYTGDFDSVIDC(配列番号10)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結するか;
(2)前記基盤ドメインは、配列番号17のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチドであり、該基盤ドメインのN末端側に、QSFLATCINGVCWTVYHGAG(配列番号4)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結し、C末端側に、EIPFYGKAI(配列番号7)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド;KLSALGVNA(配列番号9)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド;およびVATDALMTGYTGDFDSVIDC(配列番号10)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結するか;
(3)前記基盤ドメインは、配列番号18のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチドであり、該基盤ドメインのN末端側に、QSFLATCINGVCWTVYHGAG(配列番号4)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結し、C末端側に、TPAETSVRLRAYLNTPG(配列番号15)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結するか;または
(4)前記基盤ドメインは、配列番号19のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチドドを含み、C末端側に、配列番号16のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチド、EIPFYGKAI(配列番号7)を含むペプチドもしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド、KLSALGVNA(配列番号9)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド、およびVATDALMTGYTGDFDSVIDC(配列番号10)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結する。
立体構造を保持し、かつ細胞分泌能を有する基盤ドメインおよび少なくとも1つの抗原ペプチドを選択する工程;ならびに
該少なくとも1つの抗原ペプチドを、該基盤ドメインのN末端側およびC末端側のいずれかに連結した合成ポリペプチドを設計する工程
を含む。
本発明において、「ビフィズス菌」とは、ビフィドバクテリウム属に属する微生物をいう。ビフィズス菌としては、例えば、ビフィドバクテリウム・アドレスセンティス(Bifidobacterium adolescentis)、ビフィドバクテリウム・アングラタム(B. angulatum)、ビフィドバクテリウム・アニマリス・サブスピーシス・アニマリス(B. animalis subsp. animalis)、ビフィドバクテリウム・アニマリス・サブスピーシス・ラクティス(B. animalis subsp. lactis)、ビフィドバクテリウム・アステロイデス(B. asteroides)、ビフィドバクテリウム・ビフィダム(B. bifidum)、ビフィドバクテリウム・ボウム(B. boum)、ビフィドバクテリウム・ブレベ(B. breve)、ビフィドバクテリウム・カテヌラタム(B. catenulatum)、ビフィドバクテリウム・ケリナム(B. choerinum)、ビフィドバクテリウム・コリネフォーム(B. coryneforme)、ビフィドバクテリウム・クニクリ(B. cuniculi)、ビフィドバクテリウム・デンティコレンス(B. denticolens)、ビフィドバクテリウム・デンティウム(B. dentium)、ビフィドバクテリウム・ガリクム(B. gallicum)、ビフィドバクテリウム・ガリナラム(B. gallinarum)、ビフィドバクテリウム・グロボサム(B. globosum)、ビフィドバクテリウム・インディカム(B. indicum)、ビフィドバクテリウム・インファンティス(B. infantis)、ビフィドバクテリウム・イノピナタム(B. inopinatum)、ビフィドバクテリウム・ラクティス(B. lactis)、ビフィドバクテリウム・ロンガム(B. longum)、ビフィドバクテリウム・マグナム(B. magnum)、ビフィドバクテリウム・メリシカム(B. merycicum)、ビフィドバクテリウム・ミニマム(B. minimum)、ビフィドバクテリウム・パーブロラム(B. parvulorum)、ビフィドバクテリウム・シュードカテヌラタム(B. pseudocatenulatum)、ビフィドバクテリウム・シュードロンガム・サブスピーシス・グロボスム(B. pseudolongum subsp. globosum)、ビフィドバクテリウム・シュードロンガム・サブスピーシス・シュードロンガム(B. pseudolongum subsp. pseudolongum)、ビフィドバクテリウム・プロルム(B. pullorum)、ビフィドバクテリウム・ルミナル(B. ruminale)、ビフィドバクテリウム・ルミナンティアム(B. ruminantium)、ビフィドバクテリウム・セクラル(B. saeculare)、ビフィドバクテリウム・スカードビ(B. scardovii)、ビフィドバクテリウム・ズブチル(B. subtile)、ビフィドバクテリウム・スイス(B. suis)、ビフィドバクテリウム・サームアシドフィルム(B. thermacidophilum)、およびビフィドバクテリウム・サームフィルム(B. thermophilum)が挙げられる。また、これらの耐性株または変異株を用いてもよい。
GNB/LNB基質結合膜タンパク質(GLBP)は、ビフィズス菌が有するラクト-N-ビオース(すなわち、N-アセチル-3-O-(β-D-ガラクトピラノシル)-D-グルコサミン)およびガラクト-N-ビオース(すなわち、N-アセチル-3-O-(β-D-ガラクトピラノシル)-D-ガラクトサミン)を輸送するABCタンパク質(ATP Binding Cassette protein)ファミリーに属する膜タンパク質である。ABCタンパク質とは、ATP(アデノシン3リン酸)というエネルギーを使用し、すべての生物の細胞膜上で特異的な物質の輸送を能動的に行う重要な膜タンパク質であり、細胞膜上に多種のABCタンパク質が存在している。そのため、ABCタンパク質であるGLBPは、GLBP表層発現のための細胞機能が備わっているビフィドバクテリウム属細菌(ビフィズス菌)において、適切なプロモーターを利用すれば、ビフィズス菌では普遍的に発現する。例えば、ビフィドバクテリウム・ロンガムJCM1217(ATCC15707)株由来のGLBPは、配列表の配列番号2に記載のアミノ酸配列を有する(対応する塩基配列は配列番号1に示す)。
本発明においては、ビフィズス菌の表層に発現させるための免疫原性ポリペプチドは、立体構造を保持し、かつ細胞分泌能を有する基盤ドメインと、少なくとも1つの抗原ペプチドとで構成される。該少なくとも1つの抗原ペプチドは、該基盤ドメインのN末端側およびC末端側のいずれかに連結される。
(1)疎水性:イソロイシン、バリン、ロイシン、フェニルアラニン、メチオニン、アラニン、トリプトファン、グリシン;
(2)中性親水性:システイン、セリン、スレオニン、アスパラギン、グルタミン、チロシン;
(3)酸性:アスパラギン酸、グルタミン酸;
(4)塩基性:ヒスチジン、リジン、アルギニン;
(5)鎖配向に影響を及ぼす残基:グリシン、プロリン;
(6)芳香族:トリプトファン、チロシン、フェニルアラニン;および
(7)小さなアミノ酸:グリシン、アラニン、セリン。
1067位~1086位:QSFLATCINGVCWTVYHGAG(CD8エピトープ1:配列番号4)、
1169位~1177位:LLCPSGHVV(CD8エピトープ2:配列番号5)、
1291位~1298位:ITYSTYGK(CD8エピトープ3:配列番号6)、
1372位~1380位:EIPFYGKAI(CD8エピトープ4:配列番号7)、
1391位~1399位:LIFCHSKKK(CD8エピトープ5:配列番号8)、
1406位~1414位:KLSALGVNA(CD8エピトープ6:配列番号9)、
1435位~1454位:VATDALMTGYTGDFDSVIDC(CD8エピトープ7:配列番号10)、および
1629位~1637位:GAVQNEVTL(CD8エピトープ8:配列番号11)であり、CD4エピトープは、
1130位~1149位:LYLVTRHADVIPVRRRGDSR(CD4エピトープ1:配列番号12)、
1202位~1220位:ETTMRSPVFTDNSTPPAVP(CD4エピトープ2:配列番号13)、
1303位~1330位:GGCSGGAYDIIICDECHSTDSTSILGIG(CD4エピトープ3:配列番号14)、および
1531位~1547位:TPAETSVRLRAYLNTPG(CD4エピトープ4:配列番号15)である。
(1)HCV-1b型抗原ポリペプチドのNS3タンパク質のリンカー部位(1196位~1215位)およびN末端側β-α-βドメイン(1216位~1350位)に基づく基盤ドメイン(図2)
VPVESMETTMRSPVFTDNSTPPAVPQSFQVAHLHAPTGSGKSTKVPAAYAAQGYKVLVLNPSVAATLGFGAYMSKAHGVDPNIRTGVRTITTGAPITYSTYGKFLADGGCSGGAYDIIICDECHSTDSTSILGIGTVLDQAETAGARLVVLATAT(配列番号16);
(2)HCV-1b型抗原ポリペプチドのNS3タンパク質のα-ヘリカルドメイン(1510位~1657位)に基づく基盤ドメイン(図8)
GMFDSSVLCECYDAGCAWYELTPAETSVRLRAYLNTPGLPVCQDHLEFWESVFTGLTHIDAHFLSQTKQAGDNFPYLVAYQATVCARAKAPPPSWDQMWKCLIRLKPTLHGPTPLLYRLGAVQNEVTLTHPITKFIMACMSADLEVVT(配列番号17);
(3)HCV-1b型ポリペプチドのNS3タンパク質のC末端側β-α-β-ドメイン(1510位~1657位)に基づく基盤ドメイン(但し、1351位~1353位の3アミノ酸が欠失し、そしてNS3の下流側β-α-β-ドメインの1398~1399位の2つのK(リジン)をQ(グルタミン:1398位)、L(ロイシン:1399位)に置換したもの)(図9)
SVTVPHPNIEEVALSNTGEIPFYGKAIPLEAIKGGRHLIFCHSKQLCDELAAKLSALGVNAVAYYRGLDVSIIPTSGDVVVVATDALMTGYTGDFDSVIDCNTCVTQTVDFSLDPTFTIETTTVPQDAVSRSQMQGRTGRGRGGIYRFVTPGERPS(配列番号18);および
(4)NS4A領域の一部(例えば、1677位~1690位)をN末端に連結したNS3タンパク質のβ-バレルドメイン(1027位~1195位)に基づく基盤ドメイン(但し、1027~1028位の2アミノ酸および1195位のアミノ酸が欠失し、そして1144~1145位の2つのR(アルギニン)をQ(グルタミン:1144位)、L(ロイシン:1145位)に置換したもの)(図10)
TGSVVIVGRIILSGITAYSQQTRGLLGCIITSLTGRDKNQVEGEVQVVSTATQSFLATCINGVCWTVYHGAGSKTLAGPKGPITQMYTNVDQDLVGWPAPPGARSMTPCTCGSSDLYLVTRHADVIPVRQLGDSRGSLLSPRPISYLKGSSGGPLLCPSGHVVGIFRAAVCTRGVAKAVD(配列番号19:図10中のTGSVVIVGRIILSG(配列番号20)はNS4A領域に由来する)。
QSFLATCINGVCWTVYHGAG(配列番号4)、
LYLVTRHADVIPVRRRGDSR(配列番号12)、
LLCPSGHVV(配列番号5)、
ETTMRSPVFTDNSTPPAVP(配列番号13)、
ITYSTYGK(配列番号6)、
GGCSGGAYDIIICDECHSTDSTSILGIG(配列番号14)、
EIPFYGKAI(配列番号7)、
LIFCHSKKK(配列番号8)、
KLSALGVNA(配列番号9)、
VATDALMTGYTGDFDSVIDC(配列番号10)、
TPAETSVRLRAYLNTPG(配列番号15)、および
GAVQNEVTL(配列番号11)。
本発明において、ビフィズス菌の表層に発現・提示される免疫原性ポリペプチドは、GLBPとの融合タンパク質として発現される。この融合タンパク質は、N末端からGLBPおよび目的の免疫原性ポリペプチドの順に連結されている。
以下、目的の免疫原性ポリペプチドをビフィズス菌表層に融合タンパク質として発現・提示させる形質転換ビフィズス菌の調製手順の一例について、説明する。
GLBPをコードする遺伝子および目的の免疫原性ポリペプチドをコードする遺伝子は、それぞれ公知の遺伝子配列またはアミノ酸配列情報に基づいて、入手可能である。例えば、任意のビフィズス菌から調製したゲノムDNAあるいはcDNAを鋳型とし、該ビフィズス菌のGLBPの構造遺伝子の配列情報に基づいて作製したプライマー対を用いてポリメラーゼ連鎖反応(PCR)で増幅して取得し得る。一般に1つのアミノ酸に対して複数種の遺伝暗号が存在するため、公知塩基配列または公知アミノ酸配列に基づく塩基配列とは異なる塩基配列を有する遺伝子であってもよい。
上記のように調製された各タンパク質をコードする遺伝子から、免疫原性ポリペプチド表層発現カセット遺伝子または該免疫原性ポリペプチド表層発現カセット遺伝子を含む組換え体DNAを調製する。免疫原性ポリペプチド表層発現カセット遺伝子は、上述したように、目的の免疫原性ポリペプチドをコードする遺伝子が、GLBPをコードする遺伝子の3’末端側に位置するように調製される。本発明において、組換え体DNAは、発現ベクターまたは染色体組込み型ベクター(例えば、相同組換え型ベクター)であり得る。このようなベクターの調製に用いられるプラスミドとしては、ビフィズス菌で発現可能なプラスミドであれば特に制限はない。ビフィズス菌に由来するプラスミドとしては、pTB6、pBL67、pBL78、pNAL8H、pNAL8M、pNAC1、pBC1、pMB1、pGBL8bなどが用いられる。これらのプラスミドと大腸菌のプラスミドとの複合プラスミドもまた用いられ得、例えば、pBLES100、pKKT427、pRM2などが挙げられる。
組換え体DNA、例えば、上記のように調製された発現ベクターを、宿主であるビフィズス菌に導入し、形質転換ビフィズス菌を調製することができる。
本発明のワクチン組成物は、上記形質転換ビフィズス菌を有効成分として含有する。例えば、HCV免疫原性ポリペプチドを表層発現する形質転換ビフィズス菌の場合、本発明のワクチン組成物は、HCV感染に対する適切な免疫応答を十分に誘導する量で、患者に投与され得る。
HCV-1b型ポリペプチドのNS3リンカー部位(1196位~1215位)および上流側のβ-α-βドメイン(1216位~1350位)に基づく基盤ドメインのN末端およびC末端にNS3由来抗原ペプチドを連結するように、図2に示す2つのアミノ酸配列を設計した。
実施例1で設計したアミノ酸配列1および2(それぞれ配列番号23および24)を基にして、ビフィズス菌のコドン使用頻度(http://www.kazusa.or.jp/codon/)にあわせた遺伝子配列1および2(それぞれ配列番号25および27;それぞれ対応するアミノ酸配列を配列番号26および28に示す)を設計し、これらの遺伝子配列情報に基づき、それぞれの遺伝子断片を全合成した(前者を「長型」、後者を「短型」ともいう)。遺伝子断片の全合成はGenScript社に委託した。得られた遺伝子断片をXhoIおよびSalIにて処理し、同様にXhoIおよびSalIにて処理した組換えプラスミドpJT101(特許文献4および非特許文献4)に挿入した。プラスミドpJT101は、ビフィドバクテリウム・ロンガム(Bifidobacterium longum)JCM1217(ATCC15707)由来GLBP遺伝子(配列番号1および2:特許文献4および非特許文献4)を含む。上記挿入によりGLBP遺伝子の下流に「長型」または「短型」の遺伝子断片を連結させた。
上記の方法で作製したビフィドバクテリウム・ロンガム2164およびビフィドバクテリウム・ロンガム2165がGLBP-NS3融合タンパク質を正しい分子量で発現しているか、ウエスタンブロット法により確認を行った。GAM培地(「ニッスイ」:日水製薬株式会社)で一晩嫌気培養したビフィドバクテリウム・ロンガム2164およびビフィドバクテリウム・ロンガム2165を洗浄後、1%TritonX/PBSで希釈し、菌液をポリアクリルアミド電気泳動で分離した。ポリフッ化ビニリデン(PVDF)メンブレンに転写後、3%ウシ血清アルブミン(BSA)/0.1%Tween20/生理食塩水(PBS)を用いて4℃で一晩ブロッキングを行った。1000倍希釈rabbit anti-NS3 IgG(オペロン社:operon)、1000倍希釈goat anti-rabbit IgG HRP Conjugated(サンタクルーズ社:Santa Cruz)の順にそれぞれ室温で1時間振盪反応させ、化学発光法によりGLBP-NS3融合タンパク質の検出を行った。
形質転換ビフィドバクテリウム・ロンガムをGAM培地で一晩嫌気培養し、5×108CFU/mlとなるようPBSで希釈した。この菌液を100μlずつ8週齢のメスBALB/Cマウスに胃内経口投与を行った。投与は週3回、4週間行った。コントロールとしてPBS投与群、野生型ビフィドバクテリウム・ロンガム245投与群、およびGLBPのみ発現するビフィドバクテリウム・ロンガム2012投与群を用い、同じ条件で投与を行った。投与開始日を1日目とし、0、14、28日目に尾静脈採血を行うとともに糞便を回収した。29日目にはマウスに麻酔処置をした後、頸椎脱臼により安楽死させ、解剖し脾臓を摘出した。
糞便に含まれるNS3抗原特異的IgA抗体を酵素結合イムノソルベント(ELISA)法により検出した。糞便を5%スキムミルク/0.1mg/ml大豆トリプシン阻害剤/2mMフッ化フェニルメチルスルホニル/PBSに溶解させ、糞便溶解液を作製した。96穴イムノプレート(NUNC)にGST-NS3抗原ペプチドをコーティングし、5%スキムミルク/PBSを用いて37℃で1時間ブロッキングを行った。適当な濃度に希釈した糞便溶解液、1000倍希釈goat anti-mouse IgA HRP(Santa Cruz)の順にそれぞれ37℃で1.5時間反応させた。最後にTMB発色試薬(ベクトン・ディッキンソン社:BD)を添加し20分間発色させ、波長450nmで吸光度を測定した(OD 450)。また、同様に尾静脈採血で得た血液の血清中に含まれるNS3抗原特異的IgG抗体を1000倍希釈goat anti-mouse IgG HRP(R&Dシステムズ社:R&D)を用いてELISA法により検出した。
脾臓を70μlセルストレイナー(BD)を用いて細分化し、0.83% NH4Cl/PBSで溶血させた後、洗浄した。細胞を4×105細胞/穴となるよう10%FBS/RPMI培地で懸濁し、GST-NS3抗原ペプチド2μgで刺激しながら96穴マイクロプレートで3日間培養した。Mouse IFN-γ Quantikine ELISA Kit(R&D)を用いて、脾臓細胞の培養上清中のインターフェロンγ(IFN-γ)量を測定した。
HCV-1b型ポリペプチドのNS3 α-ヘリカルドメイン(1510位~1657位)に基づく基盤ドメインのN末端およびC末端にNS3由来抗原ペプチドを連結するように、図8に示すアミノ酸配列を設計した。
HCV-1b型ポリペプチドのNS3 下流側β-α-β-ドメイン(1351位~1509位)に基づく基盤ドメインのN末端およびC末端にNS3由来抗原ペプチドを連結するように、図9に示すアミノ酸配列を設計した。基盤ドメインにおいて、1351位~1353位の3アミノ酸を欠失させ、1398~1399位の2つのK(リジン)をQ(グルタミン:1398位)およびL(ロイシン:1399位)に置換した。
HCV-1b型ポリペプチドのNS4A領域の一部(1677位~1690位)をN末端に連結したNS3のβ-バレルドメイン(1027位~1195位)に基づく基盤ドメインのC末端にNS3由来抗原ペプチドを連結するように、図10に示すアミノ酸配列を設計した。基盤ドメインにおいて、1027~1028位の2アミノ酸および1195位のアミノ酸を欠失させ、そして1144~1145位の2つのR(アルギニン)をQ(グルタミン:1144位)およびL(ロイシン:1145位)に置換した。
マウスにHCVが感染しないことから、マウスに皮下腫瘍を作成し、その増殖抑制効果により本発明のワクチンの効果を評価するために以下の実験を行った。
皮下接種前日に体重を測定し(Day0)、形質転換体であることが確認されたNS3/4A-EL4細胞をC57BL/6Nマウスの皮下に移植した。移植は、1×106 個の細胞を200μl のRPMI1640&マトリゲルに包埋して皮下接種した。皮下接種日をDay1として、NS3/4Aタンパク質を表層発現するビフィズス菌の経口投与実験を開始した。
Claims (13)
- ビフィズス菌の表層に免疫原性ポリペプチドを発現するためのビフィズス菌表層発現遺伝子であって、
該遺伝子が、該免疫原性ポリペプチドをコードする遺伝子を含み、
該免疫原性ポリペプチドが、基盤ドメインおよび少なくとも1つの抗原ペプチドを含むC型肝炎ウイルス抗原ポリペプチドであり、
該基盤ドメインが、
(1)配列番号16のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチド;
(2)配列番号17のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチド;
(3)配列番号18のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチド;および
(4)配列番号19のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチド;
からなる群より選択される1つ以上を含み、
該抗原ペプチドが、配列番号4~15のアミノ酸配列を含むペプチドならびに配列番号4~15のアミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドからなる群より選択される少なくとも1つであり、
該少なくとも1つの抗原ペプチドが、該基盤ドメインのN末端側およびC末端側のいずれかに連結される、
ビフィズス菌表層発現遺伝子。 - 請求項1に記載のビフィズス菌表層発現遺伝子であって、
(1)前記基盤ドメインが、配列番号16のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチドであり、該基盤ドメインのN末端側に、QSFLATCINGVCWTVYHGAG(配列番号4)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結し、C末端側に、EIPFYGKAI(配列番号7)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域、あるいはEIPFYGKAI(配列番号7)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド、KLSALGVNA(配列番号9)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド、およびVATDALMTGYTGDFDSVIDC(配列番号10)もしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結するか;
(2)前記基盤ドメインが、配列番号17のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチドであり、該基盤ドメインのN末端側に、QSFLATCINGVCWTVYHGAG(配列番号4)を含むペプチドもしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結し、C末端側に、EIPFYGKAI(配列番号7)を含むペプチドもしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド;KLSALGVNA(配列番号9)を含むペプチドもしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド;およびVATDALMTGYTGDFDSVIDC(配列番号10)を含むペプチドもしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結するか;
(3)前記基盤ドメインが、配列番号18のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチドであり、該基盤ドメインのN末端側に、QSFLATCINGVCWTVYHGAG(配列番号4)を含むペプチドもしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結し、C末端側に、TPAETSVRLRAYLNTPG(配列番号15)を含むペプチドもしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結するか;または
(4)前記基盤ドメインが、配列番号19のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチドを含み、C末端側に、配列番号16のアミノ酸配列を含むポリペプチドまたは該アミノ酸配列を少なくとも90%の配列同一性を有するアミノ酸配列からなるポリペプチド、EIPFYGKAI(配列番号7)を含むペプチドもしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド、KLSALGVNA(配列番号9)を含むペプチドもしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチド、およびVATDALMTGYTGDFDSVIDC(配列番号10)を含むペプチドもしくは該アミノ酸配列と少なくとも90%の配列同一性を有するアミノ酸配列からなるペプチドを含む領域を連結する、
ビフィズス菌表層発現遺伝子。 - ビフィズス菌由来のGNB/LNB基質結合膜タンパク質をコードする遺伝子をさらに含み、前記免疫原性ポリペプチドをコードする遺伝子が、該ビフィズス菌由来のGNB/LNB基質結合膜タンパク質の3’末端側に位置している、請求項1または2に記載のビフィズス菌表層発現遺伝子。
- 請求項3に記載のビフィズス菌表層発現遺伝子を発現可能な様式で含む、遺伝子発現用ベクター。
- 請求項4に記載のベクターを保持し、前記免疫原性ポリペプチドを細胞表層に提示する、形質転換ビフィズス菌。
- ゲノム中に、請求項3に記載のビフィズス菌表層発現遺伝子を発現可能な様式で含み、前記免疫原性ポリペプチドを細胞表層に提示する、形質転換ビフィズス菌。
- 請求項5または6に記載の形質転換ビフィズス菌を含む、C型肝炎ワクチン組成物。
- 経口ワクチンである、請求項7に記載のワクチン組成物。
- ビフィズス菌の表層に発現させるための免疫原性ポリペプチドを設計する方法であって、 立体構造を保持し、かつ細胞分泌能を有する基盤ドメインおよび少なくとも1つの抗原ペプチドを選択する工程;ならびに
該少なくとも1つの抗原ペプチドを、該基盤ドメインのN末端側およびC末端側のいずれかに連結した合成ポリペプチドを設計する工程
を含む、方法。 - 前記基盤ドメインが、少なくとも1つのCD4エピトープもしくはCD8エピトープまたはその両方を含む、請求項9に記載の方法。
- 癌細胞の表層で特異的に発現するポリペプチドを、細胞表層で発現する形質転換ビフィズス菌。
- ビフィズス菌由来のGNB/LNB基質結合膜タンパク質をコードする遺伝子をさらに含むことを特徴とする、請求項11の形質転換ビフィズス菌。
- 請求項11または12に記載の形質転換ビフィズス菌を含む、癌ワクチン。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201480009513.7A CN105073989A (zh) | 2013-02-19 | 2014-02-14 | 免疫原性多肽表层表达双歧杆菌 |
JP2015501435A JP6213969B2 (ja) | 2013-02-19 | 2014-02-14 | 免疫原性ポリペプチド表層発現ビフィズス菌 |
US14/768,508 US9925259B2 (en) | 2013-02-19 | 2014-02-14 | Immunogenic polypeptide surface layer-expressing bifidobacterium |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-030477 | 2013-02-19 | ||
JP2013030477 | 2013-02-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014129412A1 true WO2014129412A1 (ja) | 2014-08-28 |
Family
ID=51391204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/053560 WO2014129412A1 (ja) | 2013-02-19 | 2014-02-14 | 免疫原性ポリペプチド表層発現ビフィズス菌 |
Country Status (4)
Country | Link |
---|---|
US (1) | US9925259B2 (ja) |
JP (1) | JP6213969B2 (ja) |
CN (1) | CN105073989A (ja) |
WO (1) | WO2014129412A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016208332A1 (ja) * | 2015-06-25 | 2016-12-29 | 国立大学法人神戸大学 | 経口腫瘍ワクチン |
WO2017217535A1 (ja) * | 2016-06-16 | 2017-12-21 | サンスター株式会社 | 新規トリペプチド |
WO2018123507A1 (ja) * | 2016-12-26 | 2018-07-05 | 国立大学法人神戸大学 | 経口腫瘍ワクチンと免疫抑制阻害剤との併用によるがん治療 |
WO2022163647A1 (ja) * | 2021-01-26 | 2022-08-04 | 国立大学法人神戸大学 | 経口コロナウイルス感染症ワクチン |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR102018071672A2 (pt) * | 2018-10-22 | 2021-11-16 | Fundação Oswaldo Cruz | Polipeptídeo, cassete de expressão, vetor de expressão, célula hospedeira, kit para triagem imunológica de hcv e/ou diagnóstico de hepatite c, composição, uso de pelo menos um polipeptídeo, e, métodos para produzir um polipeptídeo, para triagem imunológica de hcv e para o diagnóstico de hepatite c |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011034181A1 (ja) * | 2009-09-17 | 2011-03-24 | 森下仁丹株式会社 | ビフィズス菌表層提示融合タンパク質発現遺伝子 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0992580B1 (en) | 1993-11-04 | 2005-03-09 | Innogenetics N.V. | Immunodominant human T-cell epitopes of Hepatitis C virus |
JP3642755B2 (ja) | 2000-09-21 | 2005-04-27 | 純 天野 | 嫌気性菌を用いた遺伝子治療用医薬 |
US20070054262A1 (en) * | 2003-03-28 | 2007-03-08 | Baker Denise M | Methods of identifying optimal variants of peptide epitopes |
AU2005295317B2 (en) | 2004-10-18 | 2011-10-13 | Globeimmune, Inc. | Yeast-based therapeutic for chronic hepatitis C infection |
CA2680876C (en) | 2007-03-19 | 2018-01-16 | Morishita Jintan Co., Ltd. | Oral vaccine |
EP2331123A4 (en) | 2008-07-24 | 2012-11-07 | Aduro Biotech | COMPOSITIONS AND METHODS FOR TREATING HEPATITIS C |
JP5753090B2 (ja) * | 2008-10-29 | 2015-07-22 | ザ トラスティーズ オブ ザ ユニバーシティ オブ ペンシルバニア | 改良型hcvワクチンおよびその使用方法 |
CN104428408A (zh) * | 2012-07-13 | 2015-03-18 | 学校法人帝京平成大学 | 抗肿瘤剂、肿瘤检测标志物及口服疫苗剂 |
-
2014
- 2014-02-14 WO PCT/JP2014/053560 patent/WO2014129412A1/ja active Application Filing
- 2014-02-14 US US14/768,508 patent/US9925259B2/en not_active Expired - Fee Related
- 2014-02-14 CN CN201480009513.7A patent/CN105073989A/zh active Pending
- 2014-02-14 JP JP2015501435A patent/JP6213969B2/ja active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011034181A1 (ja) * | 2009-09-17 | 2011-03-24 | 森下仁丹株式会社 | ビフィズス菌表層提示融合タンパク質発現遺伝子 |
Non-Patent Citations (10)
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016208332A1 (ja) * | 2015-06-25 | 2016-12-29 | 国立大学法人神戸大学 | 経口腫瘍ワクチン |
CN108350411B (zh) * | 2015-06-25 | 2021-06-22 | 白川利朗 | 口服肿瘤疫苗 |
JPWO2016208332A1 (ja) * | 2015-06-25 | 2018-06-28 | 国立大学法人神戸大学 | 経口腫瘍ワクチン |
US10695385B2 (en) * | 2015-06-25 | 2020-06-30 | National University Corporation Kobe University | Oral cancer vaccine |
CN108350411A (zh) * | 2015-06-25 | 2018-07-31 | 白川利朗 | 口服肿瘤疫苗 |
EP3315599A4 (en) * | 2015-06-25 | 2019-03-06 | National University Corporation Kobe University | ORAL ANTITUMOR VACCINE |
US10676505B2 (en) | 2016-06-16 | 2020-06-09 | Sunstar Inc. | Tripeptides having angiotensin converting enzyme inhibitory activity and uses thereof |
JPWO2017217535A1 (ja) * | 2016-06-16 | 2019-04-04 | サンスター株式会社 | 新規トリペプチド |
WO2017217535A1 (ja) * | 2016-06-16 | 2017-12-21 | サンスター株式会社 | 新規トリペプチド |
CN110214028A (zh) * | 2016-12-26 | 2019-09-06 | 国立大学法人神户大学 | 联合使用口服肿瘤疫苗和免疫抑制阻滞剂的癌症治疗 |
JPWO2018123507A1 (ja) * | 2016-12-26 | 2020-01-16 | 国立大学法人神戸大学 | 経口腫瘍ワクチンと免疫抑制阻害剤との併用によるがん治療 |
WO2018123507A1 (ja) * | 2016-12-26 | 2018-07-05 | 国立大学法人神戸大学 | 経口腫瘍ワクチンと免疫抑制阻害剤との併用によるがん治療 |
US11666646B2 (en) * | 2016-12-26 | 2023-06-06 | National University Corporation Kobe University | Cancer therapy utilizing combination of oral tumor vaccine and immunosuppression inhibitor |
WO2022163647A1 (ja) * | 2021-01-26 | 2022-08-04 | 国立大学法人神戸大学 | 経口コロナウイルス感染症ワクチン |
Also Published As
Publication number | Publication date |
---|---|
JPWO2014129412A1 (ja) | 2017-02-02 |
US9925259B2 (en) | 2018-03-27 |
JP6213969B2 (ja) | 2017-10-18 |
US20160008459A1 (en) | 2016-01-14 |
CN105073989A (zh) | 2015-11-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN103415620B (zh) | 诱导针对EGFRvIII的免疫应答的方法和组合物 | |
JP5347135B2 (ja) | 遺伝子工学操作されたlisteriaおよびその使用方法 | |
CN108350411B (zh) | 口服肿瘤疫苗 | |
JP6213969B2 (ja) | 免疫原性ポリペプチド表層発現ビフィズス菌 | |
JP2011529077A (ja) | C型肝炎の治療のための組成物および方法 | |
UA94974C2 (uk) | Мікроорганізми як носії нуклеотидних послідовностей, що кодують антигени та білкові токсини, спосіб їх одержання та застосування | |
CN107073094A (zh) | 表达异源性抗原融合蛋白的重组李斯特菌菌株及其使用方法 | |
Mao et al. | Surface display on lactic acid bacteria without genetic modification: strategies and applications | |
CN110408634B (zh) | 一种非整合李斯特菌疫苗及抗肿瘤免疫应答方法 | |
ES2884948T3 (es) | Plásmido de coexpresión | |
JP2005528085A (ja) | 修飾された細菌表層タンパク質 | |
JP6810877B2 (ja) | 経口腫瘍ワクチンと免疫抑制阻害剤との併用によるがん治療 | |
RU2319741C2 (ru) | Микроорганизмы в качестве носителей нуклеотидных последовательностей, кодирующих клеточные антигены, для лечения опухолей | |
US20230059344A1 (en) | Medical Uses of 4-1BBL Adjuvanted Recombinant Modified Vaccinia Virus Ankara (MVA) | |
CN111349645B (zh) | 一种提高非整合减毒李斯特菌疫苗安全性的方法 | |
KR100818144B1 (ko) | 인터페론감마를 발현하는 살모넬라 균주 및 이를 함유하는항암 치료용 조성물 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201480009513.7 Country of ref document: CN |
|
DPE2 | Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14754016 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2015501435 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14768508 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 14754016 Country of ref document: EP Kind code of ref document: A1 |