WO2001062282A2 - Adjuvants for vaccines - Google Patents

Adjuvants for vaccines Download PDF

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Publication number
WO2001062282A2
WO2001062282A2 PCT/GB2001/000816 GB0100816W WO0162282A2 WO 2001062282 A2 WO2001062282 A2 WO 2001062282A2 GB 0100816 W GB0100816 W GB 0100816W WO 0162282 A2 WO0162282 A2 WO 0162282A2
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WO
WIPO (PCT)
Prior art keywords
adjuvant
responses
vaccine
homoserine lactone
active agent
Prior art date
Application number
PCT/GB2001/000816
Other languages
French (fr)
Other versions
WO2001062282A3 (en
Inventor
David Idris Pritchard
Original Assignee
University Of Nottingham
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 University Of Nottingham filed Critical University Of Nottingham
Priority to AU33971/01A priority Critical patent/AU3397101A/en
Publication of WO2001062282A2 publication Critical patent/WO2001062282A2/en
Publication of WO2001062282A3 publication Critical patent/WO2001062282A3/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00Medicinal preparations containing antigens or antibodies
    • A61K39/39Medicinal preparations containing antigens or antibodies characterised by the immunostimulating additives, e.g. chemical adjuvants
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00Drugs for immunological or allergic disorders
    • A61P37/02Immunomodulators
    • A61P37/04Immunostimulants
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00Medicinal preparations containing antigens or antibodies
    • A61K2039/505Medicinal preparations containing antigens or antibodies comprising antibodies
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00Medicinal preparations containing antigens or antibodies
    • A61K2039/555Medicinal preparations containing antigens or antibodies characterised by a specific combination antigen/adjuvant
    • A61K2039/55511Organic adjuvants
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00Medicinal preparations containing antigens or antibodies
    • A61K2039/57Medicinal preparations containing antigens or antibodies characterised by the type of response, e.g. Th1, Th2
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00Medicinal preparations containing antigens or antibodies

Definitions

  • This invention relates to adjuvants for vaccines.
  • Vaccines are a powerful tool in modern medical practice. They provide an effective, cost-efficient, method of preventing disease, and may also be used to stimulate the immune system in response to an existing infection. Modern vaccines are being developed to ensure enhanced immune responses to infection. Typically, vaccines require co-administration with an adjuvant.
  • Adjuvants are stimulants used with specific antigens in vaccine compositions to induce powerful and disease- appropriate immune responses to the vaccine.
  • mycobacterial antigens are routinely used to boost cell -mediated immunity as a component of Freund ' s complete adjuvant.
  • extracts from Corynehacterium parvurn and Bordetella pertussi s are commonly used.
  • T-helper 1 (Thl) cells secrete interleukin 2 (IL-2) and ⁇ -interferon, leading to an activation of cytotoxic T-cells and macrophages .
  • T-helper 2 (Th2) cells secrete IL-4 and IL-5, which assist B cells and eosinophils .
  • N-acyl homoserine lactones have been isolated from a number of bacteria, such as P otohacterium (Vibrio) fischeri , Pseudomonas aeruingosa, Erwinia carotovora,
  • the present invention is based on the realisation that a T-helper 1 (Thl) response to vaccine compositions is not always appropriate, and that a T-helper 2 (Th2) response is preferable m some cases.
  • a vaccine composition comprises an active agent (immunogen) and an adjuvant, wherein the adjuvant is capable of reducing T- helper cell type-1 responses and enhancing T-helper cell type-2 responses.
  • the adjuvant described above is used m the manufacture of a vaccine composition for the prevention or treatment of infection .
  • a homoserine lactone is used m the manufacture of a composition for oral administration with an active agent, to induce oral tolerance to the active agent.
  • the adjuvants used m the present invention comprise compounds that are capable of reducing T-helper cell type-1 responses and enhancing T-helper cell type-2 responses. Although specific compounds that have these effects are provided m the specification, it is possible for the skilled person to identify further compounds by testing compounds for the desired effects . With knowledge of an appropriate test, it is possible for the skilled person to use conventional combinatorial chemistry-based approaches to identify further compounds that may have activity m the adjuvant compositions.
  • the adjuvants of the invention promote the T-helper 2 response. This may be characterised by measuring IgGl m the presence of the adjuvant of the invention, and comparing this to that obtained using alum or phosphate buffered saline as the adjuvant. The adjuvants also reduce the T-helper 1 response m comparison to that observed for the same immunogen using alum or phosphate buffered saline as the adjuvant.
  • the T-helper 1 response may be characterised by measuring IgG2a.
  • a preferred embodiment of the invention is the use of N-acyl homoserine lactones (AHL') m the adjuvant compositions.
  • AHL' N-acyl homoserine lactones
  • OdDHL is most preferred.
  • OdDHL suppresses tumour necrosis factor ⁇ (TNF ) and mterleukm-12 (IL-12) production by macrophages, leading to a reduction m Thl cell responses. Further, IgGl and IgE responses, m murine and human tissue cultures, respectively, are promoted.
  • TNF tumour necrosis factor ⁇
  • IL-12 mterleukm-12
  • the adjuvants may be prepared for separate or co- administration with the vaccine.
  • the adjuvant and vaccine are co-administered m the one composition.
  • the vaccine may be any appropriate vaccine for the treatment/prevention of a particular disease, m particular any disease for which an enhanced Th2 response is desirable.
  • the disease is a nematodal infection or a trypanosomal infection, e.g. infection by Necator americanus .
  • the vaccine may be prepared by techniques known in the art. Appropriate immunogens will also be known to those skilled in the art. Immunogens may be of any suitable biological material that is capable of eliciting the appropriate immune response.
  • the immunogen may be an attenuated microorganism or a protein or peptide fragment of sufficient size to generate the unique immune reaction against an infecting agent.
  • the immunogen may be an antibody, e.g.
  • Vaccines for hookworm infections are disclosed in Sen et al . , Vaccine, 2000; 18:1096-1102, m Ghosh et al . The Journal of Infectious Diseases, 1999; 180:1674-1681, and in Taylor et al . , J. Exp . Med . , 2000; 191 (8 ): 1429-1436.
  • the type and concentrations of the vaccine and the adjuvant may be readily determined by a person skilled in the art.
  • the composition may comprise 10 mg/ml of a vaccine and 100 ⁇ M homoserine lactone in the adjuvant, together with a pharmaceutically acceptable diluent.
  • concentrations of vaccine will be m the range comprising of 10 mg - 10 ⁇ g/ml
  • the adjuvant may be m the range of 10-100 ⁇ M .
  • Acceptable diluents will be known to the skilled person, based on conventional adjuvant formulations.
  • the vaccine may be administered by any convenient means, m particular, by oral, systemic or parentoral routes, or a combination of these.
  • Oral tolerance may therefore be desirable m the present invention m the treatment of autoimmune disorders, where a patient's immune system is attacking self -antigens .
  • the administration of a homoserine lactone compound together with autoantigens, via the oral route may induce tolerance to the autoantigens, resulting m reduced severity of the autoimmune disorder.
  • the treatment may comprise collagen or myelm proteins as the autoantigen, to treat rheumatoid arthritis and multiple sclerosis, respectively.
  • the induction of oral tolerance may be desirable for any protein-based therapy, e.g. antibody therapy.
  • the homoserine compounds may therefore induce tolerance to antibodies, thereby enhancing their therapeutic efficacy.

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  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Mycology (AREA)
  • Microbiology (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Organic Chemistry (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Abstract

Vaccine compositions comprise an adjuvant capable of reducing T-helper cell type-1 responses and enhancing T-helper cell type-2 responses. The adjuvant preferably comprises a homoserine lactone.

Description

ADJUVANTS
Field of the Invention
This invention relates to adjuvants for vaccines. Background of the Invention
Vaccines are a powerful tool in modern medical practice. They provide an effective, cost-efficient, method of preventing disease, and may also be used to stimulate the immune system in response to an existing infection. Modern vaccines are being developed to ensure enhanced immune responses to infection. Typically, vaccines require co-administration with an adjuvant.
Adjuvants are stimulants used with specific antigens in vaccine compositions to induce powerful and disease- appropriate immune responses to the vaccine.
They are often materials derived from bacterial extracts. For example, mycobacterial antigens are routinely used to boost cell -mediated immunity as a component of Freund ' s complete adjuvant. Similarly, extracts from Corynehacterium parvurn and Bordetella pertussi s are commonly used.
Part of the immune response includes a T-helper cell response, of which there are two types. T-helper 1 (Thl) cells secrete interleukin 2 (IL-2) and γ-interferon, leading to an activation of cytotoxic T-cells and macrophages . T-helper 2 (Th2) cells secrete IL-4 and IL-5, which assist B cells and eosinophils .
N-acyl homoserine lactones have been isolated from a number of bacteria, such as P otohacterium (Vibrio) fischeri , Pseudomonas aeruingosa, Erwinia carotovora,
Agrobacterium tumefaciens and others from the Serratia,
Enterobacter and Yersinia genera. The immunogenic effect of one such AHL, N- (3 -oxododecanoyl) -L-homoserine lactone
(OdDHL) , is illustrated in Telford et al , Infection and Immunity, 1998; 66(1): 36-42. Summary of tne Invention
The present invention is based on the realisation that a T-helper 1 (Thl) response to vaccine compositions is not always appropriate, and that a T-helper 2 (Th2) response is preferable m some cases.
According to the present invention, a vaccine composition comprises an active agent (immunogen) and an adjuvant, wherein the adjuvant is capable of reducing T- helper cell type-1 responses and enhancing T-helper cell type-2 responses.
According to a second aspect of the invention, the adjuvant described above is used m the manufacture of a vaccine composition for the prevention or treatment of infection . According to a third aspect of the invention, a homoserine lactone is used m the manufacture of a composition for oral administration with an active agent, to induce oral tolerance to the active agent. Description of the Invention The adjuvants used m the present invention comprise compounds that are capable of reducing T-helper cell type-1 responses and enhancing T-helper cell type-2 responses. Although specific compounds that have these effects are provided m the specification, it is possible for the skilled person to identify further compounds by testing compounds for the desired effects . With knowledge of an appropriate test, it is possible for the skilled person to use conventional combinatorial chemistry-based approaches to identify further compounds that may have activity m the adjuvant compositions.
The adjuvants of the invention promote the T-helper 2 response. This may be characterised by measuring IgGl m the presence of the adjuvant of the invention, and comparing this to that obtained using alum or phosphate buffered saline as the adjuvant. The adjuvants also reduce the T-helper 1 response m comparison to that observed for the same immunogen using alum or phosphate buffered saline as the adjuvant. The T-helper 1 response may be characterised by measuring IgG2a.
A preferred embodiment of the invention is the use of N-acyl homoserine lactones (AHL') m the adjuvant compositions. The use of OdDHL is most preferred.
OdDHL suppresses tumour necrosis factor α (TNF ) and mterleukm-12 (IL-12) production by macrophages, leading to a reduction m Thl cell responses. Further, IgGl and IgE responses, m murine and human tissue cultures, respectively, are promoted.
The adjuvants may be prepared for separate or co- administration with the vaccine. Preferably, the adjuvant and vaccine are co-administered m the one composition.
The vaccine may be any appropriate vaccine for the treatment/prevention of a particular disease, m particular any disease for which an enhanced Th2 response is desirable. In a further preferred embodiment, the disease is a nematodal infection or a trypanosomal infection, e.g. infection by Necator americanus . The vaccine may be prepared by techniques known in the art. Appropriate immunogens will also be known to those skilled in the art. Immunogens may be of any suitable biological material that is capable of eliciting the appropriate immune response. The immunogen may be an attenuated microorganism or a protein or peptide fragment of sufficient size to generate the unique immune reaction against an infecting agent. Alternatively, the immunogen may be an antibody, e.g. a monoclonal antibody, raised against an appropriate antigen. Vaccines for hookworm infections are disclosed in Sen et al . , Vaccine, 2000; 18:1096-1102, m Ghosh et al . The Journal of Infectious Diseases, 1999; 180:1674-1681, and in Taylor et al . , J. Exp . Med . , 2000; 191 (8 ): 1429-1436.
The type and concentrations of the vaccine and the adjuvant may be readily determined by a person skilled in the art. For example, the composition may comprise 10 mg/ml of a vaccine and 100 μM homoserine lactone in the adjuvant, together with a pharmaceutically acceptable diluent. Typically, concentrations of vaccine will be m the range comprising of 10 mg - 10 μg/ml , and the adjuvant may be m the range of 10-100 μM . Acceptable diluents will be known to the skilled person, based on conventional adjuvant formulations.
The vaccine may be administered by any convenient means, m particular, by oral, systemic or parentoral routes, or a combination of these. For example, it is now established that tolerance to the systemic administration of certain drugs may be enhanced by first administering the drug through the oral route. Oral tolerance may therefore be desirable m the present invention m the treatment of autoimmune disorders, where a patient's immune system is attacking self -antigens . In this aspect, the administration of a homoserine lactone compound together with autoantigens, via the oral route, may induce tolerance to the autoantigens, resulting m reduced severity of the autoimmune disorder. For example the treatment may comprise collagen or myelm proteins as the autoantigen, to treat rheumatoid arthritis and multiple sclerosis, respectively. However, the induction of oral tolerance may be desirable for any protein-based therapy, e.g. antibody therapy. The homoserine compounds may therefore induce tolerance to antibodies, thereby enhancing their therapeutic efficacy.

Claims

1. A vaccine composition comprising an active agenc and an adjuvant, wherein the adjuvant is capable of reducing T- helper cell type-1 responses and enhancing T-helper cell type-2 responses.
2. A composition according to claim 1, wherein the adjuvant comprises a homoserine lactone.
3 A composition according to claim 1, wherein the adjuvant comprises N- (3 -oxododecanoyl ) -L-homoserine lactone.
4 A composition according to any preceding claim, for use m therapy.
5. Use of a compound capable of reducing T-helper cell type-1 responses and enhancing T-helper cells type-2 responses as an adjuvant m the manufacture of a vaccine for the prevention or treatment of infection.
6. Use according to claim 5, wherein the vaccine is for the treatment of a nematodal infection or a trypanosomal infection.
7. Use according to claim 5 or claim 6, wherein the compound is a homoserine lactone .
8. Use of a homoserine lactone m the manufacture of a composition for oral administration with an active agent, to induce oral tolerance to the active agent.
9. Use according to claim 8, wherein the active agent is a protein or peptide.
10. Use according to claim 8 or claim 9, wherein the active agent is an autoantigen.
11. Use according to claim 8 or claim 9, wherein the active agent is an antibody.
12. Use according to any of claims 7 to 11, wherein the homoserine lactone is N- (3 -oxododecanoyl ) -L-homoserine lactone .
PCT/GB2001/000816 2000-02-25 2001-02-26 Adjuvants for vaccines WO2001062282A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU33971/01A AU3397101A (en) 2000-02-25 2001-02-26 Adjuvants

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0004530.2 2000-02-25
GBGB0004530.2A GB0004530D0 (en) 2000-02-25 2000-02-25 Adjuvants

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WO2001062282A2 true WO2001062282A2 (en) 2001-08-30
WO2001062282A3 WO2001062282A3 (en) 2001-12-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7135181B2 (en) 2000-02-21 2006-11-14 Pharmexa A/S Method for down-regulation of amyloid
EP3299029A1 (en) 2001-08-20 2018-03-28 H. Lundbeck A/S Novel method for down-regulation of amyloid

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5776974A (en) * 1993-07-02 1998-07-07 The University Of Nottingham Immunosuppressant compounds

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5776974A (en) * 1993-07-02 1998-07-07 The University Of Nottingham Immunosuppressant compounds

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
SEN L ET AL: "HOOKWORM BURDEN REDUCTIONS IN BALB/C MICE VACCINATED WITH RECOMBINANT ANCYLOSTOMA SECRETED PROTEINS (ASPS) FROM ANCYLOSTOMA DUODENALE, ANCYLOSTOMA CANINUM AND NECATOR AMERICANUS" VACCINE, BUTTERWORTH SCIENTIFIC. GUILDFORD, GB, vol. 18, no. 11/12, January 2000 (2000-01), pages 1096-1102, XP001005230 ISSN: 0264-410X cited in the application *
TELFORD G ET AL: "THE PSEUDOMONAS AERUGINOSA QUORUM-SENSING SIGNAL MOLECULE N-(3-OXODODENCANOYL)-L-HOMOSERINE LACTONE HAS IMMUNOMODULATORY ACTIVITY" INFECTION AND IMMUNITY, AMERICAN SOCIETY FOR MICROBIOLOGY. WASHINGTON, US, vol. 66, no. 1, January 1998 (1998-01), pages 36-42, XP001007928 ISSN: 0019-9567 cited in the application *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7135181B2 (en) 2000-02-21 2006-11-14 Pharmexa A/S Method for down-regulation of amyloid
EP3299029A1 (en) 2001-08-20 2018-03-28 H. Lundbeck A/S Novel method for down-regulation of amyloid

Also Published As

Publication number Publication date
GB0004530D0 (en) 2000-04-19
WO2001062282A3 (en) 2001-12-27
AU3397101A (en) 2001-09-03

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