EP0662085A1 - Peptid mit eine kreuzreaktivität gegen anti hepatitis b obenflächen antigen antiserum - Google Patents

Peptid mit eine kreuzreaktivität gegen anti hepatitis b obenflächen antigen antiserum

Info

Publication number
EP0662085A1
EP0662085A1 EP93919220A EP93919220A EP0662085A1 EP 0662085 A1 EP0662085 A1 EP 0662085A1 EP 93919220 A EP93919220 A EP 93919220A EP 93919220 A EP93919220 A EP 93919220A EP 0662085 A1 EP0662085 A1 EP 0662085A1
Authority
EP
European Patent Office
Prior art keywords
peptide
hepatitis
epitope
hbsag
cttp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP93919220A
Other languages
English (en)
French (fr)
Inventor
Venkatasamy Manivel
Kanury Venkattasubba Rao
Subrat Kumar Panda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INTERNATIONAL CENTRE FOR GENETIC ENGINEERING AND B
Original Assignee
UNITED NATIONS INDUSTRIAL DEVELOPMENT ORGANIZATION
UNITED NATIONS IND DEV ORGANIZ
International Centre for Genetic Engineering and Biotechnology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UNITED NATIONS INDUSTRIAL DEVELOPMENT ORGANIZATION, UNITED NATIONS IND DEV ORGANIZ, International Centre for Genetic Engineering and Biotechnology filed Critical UNITED NATIONS INDUSTRIAL DEVELOPMENT ORGANIZATION
Publication of EP0662085A1 publication Critical patent/EP0662085A1/de
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/005—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from viruses
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/576—Immunoassay; Biospecific binding assay; Materials therefor for hepatitis
    • G01N33/5761—Hepatitis B
    • G01N33/5764—Hepatitis B surface antigen
    • 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
    • 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
    • C12N2730/00—Reverse transcribing DNA viruses
    • C12N2730/00011—Details
    • C12N2730/10011—Hepadnaviridae
    • C12N2730/10111—Orthohepadnavirus, e.g. hepatitis B virus
    • C12N2730/10122—New viral proteins or individual genes, new structural or functional aspects of known viral proteins or genes

Definitions

  • the invention relates to a peptide showing cross-reactivity with anti-hepatitis B surface antigen (HBsAg) antiserum.
  • HBsAg anti-hepatitis B surface antigen
  • the major protein (or S protein) of the hepatitis B surface antigen (hereinafter referred to as "HBsAg") comprises a length of 226 amino acids and encodes a group-specific determinant, also known as "a" determinant, that is common to all subtypes of the hepatitis B virus (HBV).
  • group-specific determinant also known as "a” determinant
  • d or y and w or r there are two groups of mutually exclusive subtype-specific determinants, d or y and w or r, resulting in four major subtypes of the virus: adw, adr, ayw and ayr.
  • HBsAg antihepatitis B surface antigen
  • the sequence contains five cysteine residues, whereby one each is situated at the amino- and carboxy-terminii and a series of three consecutive cysteine residues is situated at the positions 137, 138 and 139.
  • the peptide OS [124- 147] shows a high degree of cross-reactivity with a polyclonal anti-HBsAg antiserum while neither partially reduced trimeric forms of the peptide nor completely reduced monomer forms of the peptide showed any cross-reactivity with the anti-HBsAg antiserum. This is disclosed by the diagram as shown in Fig. 3 in which the trimeric forms are designated by TS[124-147] and the monomer forms by MS[124-147]. This leads to the conclusion that the peptide OS[124-147] contains conformational, disulfide-dependent epitopes that are also present on the native S protein.
  • HBsAg subtype-specific antisera When using HBsAg subtype-specific antisera it was observed that the HBsAg-related epitopes that are formed by the peptide OS[124-147] represent the group-specific or "a" epitopes of HBsAg.
  • the present invention in essence concerns a peptide which is capable of mimicking the hepatitis B surface antigen so that it can generate antibodies against hepatitis in animals in the same way as the hepatitis B surface antigen.
  • a method for the manufacture of a peptide according to the invention for use in the formation of vaccines comprises building in any conventional manner, on a conventional support, a predeterminated sequence of amino acids such as herein described, said predetermined sequence corresponding to that of hepatitis B surface antigen epitope, coupling the amino terminus of the peptide so formed with a fatty acid, subjecting said peptide to cleavage to separate the peptide from said support and simultaneously deprotecting the amino acid side chains of the peptide by treating it with an acid of the kind such as herein described in the presence of a scavenger, washing the product so formed with a solvent, extracting said product and lyophilizing said product to yield a crude peptide and purifying the crude product in any appropriate manner to obtain said peptide for use in the manufacture of vaccine.
  • the supports on which the predetermined amino acid sequence is built are commercially available.
  • the most commonly used supports are solid resins.
  • the applicants have obtained excellent results by employing 4-methylbenzhydrylamine resin as solid support.
  • the building of individual amino acid on the support is well known in the art.
  • Such coupling may be carried out in the presence of any conventional activator, carbodiimide being the most preferred.
  • any amino acid sequence may be built for vaccine against hepatitis, the following twelve animo acids viz. cystein proline alanine, glutamine, glycine, asparagine, serine. methionine, phenylalamine, lysine and aspartic acid were employed.
  • the crude product is dissolved in deionized water.
  • This solution is then dialyzed thoroughly against deionized water over a period of 24 hours with the dialyzing medium being changed at least five times and a membrane having a molecular weight cut-off of 1.200 daltons is used.
  • the dialyzed solution is frozen and lyophilized to provide a quantitative yield of the product.
  • the peptide OS[124-147] In order to obtain an efficient candidate vaccine, the peptide OS[124-147] must be immunogenic, i.e., it must be capable of eliciting an antibody response in the absence of a carrier protein.
  • Balb/c mice and New Zealand white rabbits were immunized with the peptide OS[124-147] using the complete and incomplete Freud's adjuvant system.
  • Anti-peptide responses were obtained in both hosts indicating that the peptide OS[124-147] is indeed immunogenic.
  • both the mice and the rabbits showed antisera that cross-reacts equally well with this 5 peptide or the native HBsAg (see Fig.
  • lyine 141 represent individual constituents of the epitope which represent the "a" epitope of HBsAg.
  • the methionine 133 - lysine 141 dependent "a" epitope has not been found yet.
  • the peptide OS [124- 147] represents a group-specific determinant of HBsAg. This "a" epitope is a dominant epitope and was recognized by all fifty of the human HBsAg sera tested. Having shown that the peptide OS[124-147] is immunogenic in both mice and rabbits with Freud's adjuvant system, the system cannot be used in humans, because of the toxicity of Freud's adjuvant system in humans. To find a vaccine it is therefore necessary that the immunogenicity of the peptide OS[124-147] is demonstrated in alum, because alum is the only adjuvant approved for human use.
  • a myristic acid residue was attached to the amino-terminus of the peptide so as to achieve a higher aggregation via micelle-like interactions.
  • the myristylated peptide (OS[124-147]) showed a quantitative aggregation, which was determined by sucrose density gradient centrifugation.
  • the myristylated peptide showed immunogenic reactions in separate strains of mice and in rabbits (see Table 3).
  • This alum adsorbed myristylated peptide OS[124-147] is highly immunogenic in rhesus monkeys at all doses tested. At a 50 ⁇ g dose the obtained anti-peptide titer was comparable to that obtained in the monkey vaccinated in the usual manner. On the other hand, the monkey immunized with a 250 ⁇ g dose showed a twice higher antibody response. Immunization with a 500 ⁇ g dose of peptide showed a thirteen-fold higher antibody reaction as opposed to monkeys vaccinated in the usual manner. In all of the four monkeys at least 80 % of the anti-OS [124- 147] response was directed against the methionine 133 - lysine 141 dependent "a" epitope.
  • peptides were synthesized.
  • One peptide represented the 124-147 sequence of HBsAg of subtype adw, but with aspartic acid at position 144.
  • the other peptide that represented the sequence 124-147 of HBsAg of subtype ayr.
  • Both protected peptides which were grafted onto a resin, were myristylated and mixed in equimolar quantities, whereupon they were cleaved from the resin to obtain a co-oligomer of both peptides.
  • a solid phase peptide synthesis of the sequence between residues 124 and 147 of hepatitis B virus surface antigen (subtype adw) is carried out, whereby 4-methylbenzhydrylamine resin is used as solid support.
  • the individual coupling reactions are carried out in the presence of a four-fold excess of protected amino acids using carbodiimide as activator.
  • the synthesis is performed in a 0.5 mmole scale using 2 mmoles of each protected amino acid. Twelve protected amino acids are used in the synthesis, namely cysteine, threonine, proline, alanine, glutamine, glycine, asparagine, serine, methionine, phenylalanine, lysine and aspartic acid.
  • This solution is then dialyzed thoroughly against deionized water over a period of 24 hours with the dialyzing medium being changed at least five times and a membrane having a molecular weight cut-off of 1200 daltons is used.
  • the dialyzed solution is frozen and lyophilized to provide the product.
  • the obtained product is subjected to immunological tests and evaluation to ascertain that an accurate mimic of the "a" determinant has indeed been formed. Electron microscopic examination of an aqueous solution of this product can also be carried out to verify the presence of hepatitis B surface antigen-like particles.
  • Table 1 shows that antisera that are specific for three distinct subtypes of hepatitis B surface antigen are capable of recognizing the oligomeric peptide OS[124-147] to a large extent. However, neither the partially reduced trimetric form (TS[124-147]) nor the completely reduced monomeric form (MS [124- 147]) are capable of recognizing this peptide. This clearly shows that the hepatitis B surface antigen-related epitope is expressed by the peptide OS[124-147] and represents the group-specific "a" determinant and that the antigenicity is dependent on the disulfide bonds.
  • HBsAg subtype-specific antisera (WHO International Reference Standard) were screened for reactivity against the indicated peptides at a dilution of 1: 100. A P/N value in excess of 2.0 is regarded as a positive value.
  • polyclonal rabbit antisera effective against the peptide OS[124-147] were screened for cross-reactivity with the International Standard hepatitis B surface antigen preparations of six different subtypes.
  • Table 2 shows the results of this experiment, whereby a parallel set of assays with polyclonal anti-hepatitis B surface antigen antisera were used as positive control. Anti-peptide OS[124-147] antisera reacted to comparable extents with all six of the subtypes tested. The implication of these results is that an immunization with the indicated peptide OS[124-147] will produce antibodies capable of recognizing all strains of the hepatitis B virus. A 1 :500 dilution of either rabbit anti-OS [124- 147] or horse anti-HBsAg was used for this experiment. The various HBsAg-subtypes used are indicated in Table 2. TABLE
  • Table 3 shows the immunogenicity of myristylated peptide OS[124-147] in alum.
  • the results shown in the table represent the anti-peptide titers obtained after a primary immunization followed by a booster dose given four weeks later.
  • the peptides adsorbed onto alum were used as the immunogen, whereby the dose was either 20 ⁇ g per mouse or 200 ⁇ g per rabbit.
  • Table 4 shows the immunogenicity of alum-adsorbed myristylated peptide OS[124-147] in rhesus monkeys.
  • the anti-peptide titers were obtained after a first immunization followed by a booster immunization one month later.
  • Fig. 1 shows the primary sequence of the peptide OS [124- 147] (subtype adw). The single-letter code for amino acids was used here.
  • Fig. 2 shows a polyacrylamide gel electrophoresis of the peptides OS[124-147] and TS[124-147].
  • two micrograms of each peptide were dissolved in an equal volume of mercaptoethanol-deficient sample buffer and resolved on an 18% polyacrylamide gel. Visualization was effected by silver staining.
  • lane 1 shows the molecular weight marker
  • lane 2 the peptide OS[124-147]
  • lane 3 the peptide TS[124-147].
  • FIG. 3 shows the extent to which a polyclonal anti-HBsAg antiserum recognizes the peptide OS [124- 147], but not the peptide TS[124-147] or the peptide MS[124-147].
  • the tests were carried out in an ELISA assay. The data are expressed as P/S ratios, whereby S represents the absorbance obtained with an irrelevant monomere peptide.
  • Fig. 4 shows the titration profiles of polyclonal anti-OS[124-147] sera versus
  • Fig. 6 shows the peptide OS[124-147] and its analogs. The positions where individual amino acids were deleted, substituted or modified are underlined.
  • Fig. 7 shows the identification of the amino acid residues used in an anti-ay binding assay.
  • the peptide OS[124-147] and its analogs were coated separately onto wells of an ELISA plate and the reactivity with guinea pig anti-HBsAg (ay) at a final dilution of 1:200 was determined.
  • the relative antigenicity (RA) represents the ratio of absorbance obtained for a given analog versus that obtained for the parent peptide after the subtraction of the background.
  • Fig. 8 shows the identification of human anti-HBsAg antibody binding residues on the peptide OS[124-147].
  • the cumulative results for fifty independent sera are presented here as the percent of the total number of samples which show the reactivity with the analogs relative to the parent peptide OS[124-147].
  • Fig. 9 shows the sucrose density gradient profile of myristylated peptide OS[124-147]. 200 ⁇ g of myristylated peptide OS[124-147] in 100 ⁇ l was layered onto a 10 -
  • Fig. 10 shows the primary sequences of the individual component peptides of the peptide OS[D/N-ayr].
  • a synthetic peptide was found representing the sequence between residues 124-147 of the hepatitis B surface antigen and showing spontaneous oligomerization to form a conformational, disulfide- and oligomer-dependent group-specific or "a" antigenic determinant of the hepatitis B surface antigen.
  • the peptide OS[124-147] mimics the corresponding epitope of the native antigen withhigh precision and represents a dominant constituent of the epitope of the hepatitis B surface antigen when introduced into the human immune system.
  • the peptide OS[124-147] is immunogenic in mice as well as rabbits and the antibodies elicited against this peptide are capable of recognizing a plurality of hepatitis B surface antigen subtypes.
  • the peptide OS[124-147] forms spherical and tubular aggregates in aqueous solutions which are reminiscent of native hepatitis B surface antigen particles.
  • the peptide OS[124-147] represents an antigenic and structural mimetic of hepatitis B surface antigen and consequently it is a candidate vaccine for hepatitis B.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Molecular Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Urology & Nephrology (AREA)
  • Biochemistry (AREA)
  • Hematology (AREA)
  • Medicinal Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Organic Chemistry (AREA)
  • Biotechnology (AREA)
  • Microbiology (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Biophysics (AREA)
  • Cell Biology (AREA)
  • Genetics & Genomics (AREA)
  • Communicable Diseases (AREA)
  • Virology (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Peptides Or Proteins (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
EP93919220A 1992-09-01 1993-08-30 Peptid mit eine kreuzreaktivität gegen anti hepatitis b obenflächen antigen antiserum Ceased EP0662085A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT174692 1992-09-01
AT1746/92 1992-09-01
PCT/EP1993/002342 WO1994005698A1 (en) 1992-09-01 1993-08-30 Peptide showing cross-reactivity with the anti-hepatitis b surface antigen antiserum

Publications (1)

Publication Number Publication Date
EP0662085A1 true EP0662085A1 (de) 1995-07-12

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EP93919220A Ceased EP0662085A1 (de) 1992-09-01 1993-08-30 Peptid mit eine kreuzreaktivität gegen anti hepatitis b obenflächen antigen antiserum

Country Status (3)

Country Link
EP (1) EP0662085A1 (de)
AU (1) AU4955593A (de)
WO (1) WO1994005698A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001508054A (ja) * 1996-12-30 2001-06-19 イノジェネティックス・ナムローゼ・フェンノートシャップ ＨＢｓＡｇ由来アネキシンＶ結合ポリペプチドおよびその使用
US6913749B2 (en) 1998-11-02 2005-07-05 Resistentia Pharmaceuticals Ab Immunogenic polypeptides for inducing anti-self IgE responses

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9405698A1 *

Also Published As

Publication number Publication date
WO1994005698A1 (en) 1994-03-17
AU4955593A (en) 1994-03-29

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