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  • A61K9/00—Medicinal preparations characterised by special physical form
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  • A61K9/107—Emulsions ; Emulsion preconcentrates; Micelles
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  • C07H15/02—Acyclic radicals, not substituted by cyclic structures
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  • C07H15/00—Compounds containing hydrocarbon or substituted hydrocarbon radicals directly attached to hetero atoms of saccharide radicals
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  • A61K2039/51—Medicinal preparations containing antigens or antibodies comprising whole cells, viruses or DNA/RNA
  • A61K2039/525—Virus
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  • A61K39/00—Medicinal preparations containing antigens or antibodies
  • A61K2039/555—Medicinal preparations containing antigens or antibodies characterised by a specific combination antigen/adjuvant
  • A61K2039/55511—Organic adjuvants
  • A61K2039/55572—Lipopolysaccharides; Lipid A; Monophosphoryl lipid A
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  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K39/00—Medicinal preparations containing antigens or antibodies
  • A61K2039/57—Medicinal preparations containing antigens or antibodies characterised by the type of response, e.g. Th1, Th2
• • 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
  • A61K2039/57—Medicinal preparations containing antigens or antibodies characterised by the type of response, e.g. Th1, Th2
  • A61K2039/575—Medicinal preparations containing antigens or antibodies characterised by the type of response, e.g. Th1, Th2 humoral response

Definitions

• the present invention relates to the field of pharmaceutical and vaccine compositions. More specifically, embodiments described herein relate to pharmaceutical and vaccine compositions, as well as related prophylactic and therapeutic methods, wherein the compositions comprise a glucopyranosyl lipid adjuvant (GLA) as described herein.
• GLA glucopyranosyl lipid adjuvant
• Immune responses have traditionally been characterized as either humoral responses, in which antibodies specific for antigens are produced by differentiated B lymphocytes known as plasma cells, or cell mediated responses, in which various types of T lymphocytes act to eliminate antigens by a number of mechanisms.
• B lymphocytes differentiated B lymphocytes known as plasma cells
• cell mediated responses in which various types of T lymphocytes act to eliminate antigens by a number of mechanisms.
• CD4+ helper T cells that are capable of recognizing specific antigens may respond by releasing soluble mediators such as cytokines to recruit additional cells of the immune system to participate in an immune response.
• CD8+ cytotoxic T cells that are also capable of specific antigen recognition may respond by binding to and destroying or damaging an antigen-bearing cell or particle. It is known in the immunological arts to provide certain vaccines according to a variety of formulations, usually for the purpose of inducing a desired immune response in a host.
• Several strategies for eliciting specific immune responses through the administration of a vaccine to a host include immunization with heat-killed or with live, attenuated infectious pathogens such as viruses, bacteria or certain eukaryotic pathogens; immunization with a non-virulent infective agent capable of directing the expression of genetic material encoding the antigen(s) to which an immune response is desired; and immunization with subunit vaccines that contain isolated immunogens (such as proteins) from a particular pathogen in order to induce immunity against the pathogen.
• infectious pathogens such as viruses, bacteria or certain eukaryotic pathogens
• a non-virulent infective agent capable of directing the expression of genetic material encoding the antigen(s) to which an immune response is desired
• subunit vaccines that contain isolated immunogens (such as proteins) from a particular pathogen in order to induce immunity against the pathogen.
• enterobacterial lipopolysaccharide is a potent stimulator of the immune system, although its use in adjuvants has been curtailed by its toxic effects.
• LPS enterobacterial lipopolysaccharide
• MPL monophosphoryl lipid A
• a further detoxified version of MPL results from the removal of the acyl chain from the 3-position of the disaccharide backbone, and is called 3-O- deacylated monophosphoryl lipid A (3D-MPL). It can be purified and prepared by the methods taught in GB 2122204B, which reference also discloses the preparation of diphosphoryl lipid A, and 3-O-deacylated variants thereof.
• 3D-MPL has been prepared in the form of an emulsion having a small particle size less than 0.2 ⁇ m in diameter, and its method of manufacture is disclosed in WO 94/21292.
• Aqueous formulations comprising monophosphoryl lipid A and a surfactant have been described in WO9843670A2.
• Bacterial lipopolysacchahde-derived adjuvants to be formulated in adjuvant combinations may be purified and processed from bacterial sources, or alternatively they may be synthetic.
• purified monophosphoryl lipid A is described in Ribi et at 1986 ⁇ supra
• 3-O-deacylated monophosphoryl or diphosphoryl lipid A derived from Salmonella sp. is described in GB 2220211 and U.S. Pat. No. 4,912,094.
• 3D-MPL and the ⁇ (1 -6) glucosamine disaccharides as well as other purified and synthetic lipopolysaccharides have been described (WO 98/01139; U.S. Pat. No.
• WO 95/17210 discloses an adjuvant emulsion system based on squalene, ⁇ - tocopherol, and polyoxyethylene sorbitan monooleate (TWEENTM-80), formulated with the immunostimulant QS21 , and optionally including 3D-MPL.
• TWEENTM-80 polyoxyethylene sorbitan monooleate
• the use of adjuvants derived from natural products is accompanied by high production costs, inconsistency from lot to lot, difficulties associated with large-scale production, and uncertainty with respect to the presence of impurities in the compositional make-up of any given preparation.
• GLA glucopyranosyl lipid adjuvants
• the GLA compounds of the present invention have utility over a broad range of therapeutic applications where induction of specific or nonspecific immune responses is desired.
• vaccine compositions comprising one or more GLA compounds as set forth herein in combination with an antigen.
• Such vaccine compositions may be advantageously used in methods for stimulating antigen-specific immune responses in subjects in need thereof.
• pharmaceutical compositions comprising one or more GLA compounds as set forth herein, wherein the compositions are substantially devoid of antigen.
• Such pharmaceutical compositions may be advantageously used in methods for stimulating non- specific immune responses in subjects in need thereof, for example in the treatment of infection, seasonal rhinitis and the like.
• Figure 1 demonstrates IFN- ⁇ cytokine production induced in vivo following vaccination of mice with compositions of the invention comprising antigen and GLA.
• Figures 2A-2F show antibody responses induced in vivo following vaccination of mice with compositions of the invention comprising antigen and GLA.
• Figure 3 shows the NF-kB enhancement observed at different concentrations of an illustrative GLA compound of the invention (Compound IX).
• FIGS 4A-4D show the induction of immunostimulatory cytokines (MIP-1 b and TNFa) at different concentrations of an illustrative GLA compound of the invention (Compound IX).
• Monophosphoryl lipid A (MPL) and other related adjuvants are known to mediate their effects, at least in part, by acting as agonists of Toll-like receptors (TLR).
• TLR Toll-like receptors
• the glucopyranosyl lipid adjuvant (GLA) compounds of the present invention were rationally designed based upon 3D structural considerations in relation to TLR receptor stimulation. More specifically, according to the present invention, by selectively defining the acyl chain lengths of the GLA compounds of the invention such that they achieve a "flat" bottom in the three dimensional structure of the compounds, an improved fit may be achieved within the binding site of a TLR receptor, thereby resulting in enhanced TLR stimulation and enhanced immunostimulatory properties.
• the solubility of the GLA compounds of the invention is advantageously improved due to the shortened acyl chain lengths, thereby facilitating efficient and effective compound formulation.
• the acyl chain lengths are tailored to make the molecule three dimensionally "flat" along the bottom of the molecule, the compounds can be more effectively incorporated within vesicles, e.g., for liposomal formulations.
• compounds of the invention provide advantageous profiles of potency relative to toxicity.
• the compounds of the invention may be used over a broad and relatively high range of dosages for achieving a desired level of activity ⁇ e.g., adjuvant activity), while nevertheless remaining substantially non-toxic to human cells and to human patients, as assayed, for example, by the levels of tumor necrosis factor produced from human cells over a range of concentrations, which quickly rises and levels off unlike other more toxic TLR4 agonists such as lipopolysaccharide.
• This cell based assay should be predictive of lower inflammatory markers like C-reactive protein involved in adverse events in human pharmacology. The favorable potency vs.
• toxicity profile for the compounds of the invention may be particularly important, for example, when administering to children whose tolerance to cytokines may be lower, or when the compounds are used in formulations targeted at a large population where more leveled responses will translate into more consistent clinical outcomes for people with a varied responsiveness to TLR agonism.
• regulatory approval will be simplified since target dosing will be more forgiving and manufacturing simplified when the range of active pharmaceutical ingredient need not be controlled at as strict a tolerance level.
• the present invention in its many embodiments provides compounds, vaccine compositions, adjuvant compositions, pharmaceutical compositions and related formulations and methods that include synthetic GLA compounds as described herein.
• the GLA compounds represent synthetic immunomodulators which, advantageously relative to adjuvants of the prior art, and in particular, relative to natural product adjuvants, can be prepared in substantially homogeneous form.
• the GLA compounds of the invention can be prepared efficiently and economically through large-scale synthetic chemical manufacturing, unlike natural product- derived adjuvants. Because a synthetic adjuvant that is chemically synthesized from defined starting materials to obtain a chemically defined product exhibits qualitative and quantitative batch-to-batch consistency, the GLA compounds of the invention offer benefits including improved product quality control.
• GLA compounds, compositions and methods for their use include in some embodiments the use of GLA by itself with a pharmaceutically acceptable carrier or excipient for immunological adjuvant activity (e.g., non-specific immunostimulatory activity), including "adjuvanting" in which GLA administration to a subject may be wholly independent of, and/or separated temporally and/or spatially from, administration to the subject of one or more antigens against which elicitation or enhancement of an immune response ⁇ e.g., an antigen-specific response) in the subject is desired.
• Other embodiments include the use of GLA in a vaccine composition that also includes one or a plurality of antigens to which an immune response elicited or enhanced by such a vaccine is desired.
• these vaccine compositions may in certain related embodiments also include one or more toll-like receptor (TLR) agonist and/or one or a plurality of one or more of a co-adjuvant, an imidazoquinoline immune response modifier, and a double stem loop immune modifier (dSLIM).
• TLR toll-like receptor
• dSLIM double stem loop immune modifier
• a vaccine composition as provided herein may comprise GLA and one or more recombinant expression constructs each comprising a promoter operably linked to a nucleic acid sequence encoding the antigen against which elicitation or enhancement of an immune response ⁇ e.g., an antigen-specific response) in the subject is desired.
• GLA toll-like receptor
• GLA is a chemically synthesized adjuvant it can be prepared in substantially homogeneous form, which refers to a GLA preparation that is at least 80%, preferably at least 85%, more preferably at least 90%, more preferably at least 95% and still more preferably at least 96%, 97%, 98% or 99% pure with respect to the GLA molecule.
• GLA compounds of the present invention have the following formula (I):
• L 1 , L 2 , L 3 , L 4 , L 5 and L 6 are the same or different and independently -O-, -NH- or -(CH 2 )-;
• Y 2 and Y 3 are the same or different and independently -OH, -SH, or an acid functional group
• Y 4 is -OH or -SH
• Ri, R 3 , R 5 and R 6 are the same or different and independently C 8- 13 alkyl
• R 2 and R 4 are the same or different and independently C 6- n alkyl.
• Alkyl means a straight chain or branched, noncyclic or cyclic, unsaturated or saturated aliphatic hydrocarbon containing from 1 to 20 carbon atoms, and in certain preferred embodiments containing from 11 to 20 carbon atoms.
• saturated straight chain alkyls include methyl, ethyl, n- propyl, n-butyl, n-pentyl, n-hexyl, and the like, including undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, etc.; while saturated branched alkyls include isopropyl, sec-butyl, isobutyl, tert-butyl, isopentyl, and the like.
• saturated cyclic alkyls include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and the like; while unsaturated cyclic alkyls include cyclopentenyl and cyclohexenyl, and the like.
• Cyclic alkyls are also referred to herein as “homocycles” or “homocyclic rings.”
• Unsaturated alkyls contain at least one double or triple bond between adjacent carbon atoms (referred to as an "alkenyl” or “alkynyl”, respectively).
• Representative straight chain and branched alkenyls include ethylenyl, propylenyl, 1 -butenyl, 2-butenyl, isobutylenyl, 1 -pentenyl, 2-pentenyl, 3-methyl-1 -butenyl, 2-methyl-2-butenyl, 2,3-dimethyl-2-butenyl, and the like; while representative straight chain and branched alkynyls include acetylenyl, propynyl, 1-butynyl, 2-butynyl, 1 -pentynyl, 2-pentynyl, 3-methyl-1 -butynyl, and the like.
• C 8 -i 3 alkyl and “C 6 -nalkyl” mean an alkyl as defined above, containing from 8-13 or 6-11 carbon atoms, respectively.
• Acid functional group means a functional group capable of donating a proton in aqueous media (i.e. a Br ⁇ nsted-Lowry acid). After donating a proton, the acid functional group becomes a negatively charged species (i.e. the conjugate base of the acid functional group).
• the present invention provides GLA compounds of formula (II), wherein Ri, R 3 , R 5 and Re are each C x alkyl, where x is constant and is selected from an integer from 8-13, and R2 and R 4 are both C x- 2 alkyl, and the GLA compounds have the following formula (III):
• the present invention provides GLA compounds of formula (III), wherein x is selected from an integer from 10-12. In other more specific embodiments, the present invention provides GLA compounds of formula (III), wherein x is 11 , and the GLA compounds have the following structure (IV):
• the invention provides GLA compounds of formula (II), wherein Li and L 3 are both -O- and L 2 and L 4 are both -NH-, and the GLA compounds have the following formula (Vl):
• the invention provides GLA compounds of formula (II), wherein Y 1 is -OP(O)(OH) 2 , Y2, Y3 and Y 4 are each OH, L 1 and L 3 are both -O-, and L 2 and L 4 are both -NH-, and the GLA compounds have the following formula (VII):
• the present invention provides GLA compounds of formula (II), wherein Y 1 is -OP(O)(OH) 2 , Y 2 , Y 3 and Y 4 are each -OH, L 1 and L 3 are both -O-, L 2 and L 4 are both -NH-, R 1 , R 3 , R 5 and R 6 each are C x alkyl where x is constant and is selected from an integer from 8-13, and R2 and R 4 are both C x- 2 alkyl, and the GLA compounds have the following formula (VIII):
• the present invention provides GLA compounds.
• the GLA compounds of the present invention may be prepared by known organic synthesis techniques, including the methods described in more detail in the Examples.
• the GLA compounds of structure (I) may be prepared by the following Reaction Schemes, wherein all substituents are as defined above unless indicated otherwise. Reaction Scheme 1
• the sugar backbone of representative GLA compounds can be prepared generally according to Reaction Scheme 1 , wherein d, G 2 , G 3 , G 4 , G 5 , G 6 , G 7 , G 8 , G 9 , and G 10 are either the same or different and independently an appropriate protecting group or hydrogen.
• An appropriate sugar, such as (i) can be purchased or prepared according to methods known to those skilled in the art.
• the functional groups of sugar (i) can then be fully protected using methods known to those skilled in the art to obtain (ii).
• an appropriate orthogonal protecting group strategy which allows for selective deprotection of the sugar functional groups may be employed.
• Suitable protecting groups include, but are not limited to silylethers, benzyl ethers, allyloxycarbonyl, acetals, Fmoc, azide, and the like. Deprotection of Gi results in free alcohol (iii) which can then be coupled with protected sugar (iv) using appropriate coupling conditions, for example CCIsCN/NaH, to obtain the desired sugar backbone (v).
• Acid compounds of structure (vi) can be purchased or prepared according to methods known to those skilled in the art. Reaction of (vi) with an appropriate reagent, such as methyl hydrogen malonate, yields ketoester (vii). Reduction of (vii) yields alcohol (viii). One skilled in the art will recognize that under appropriate conditions the keto group of (vii) may be reduced stereospecifically as exemplified in the Examples. Saponification of (viii) yields acid (ix) which can be subsequently protected to yield (x).
• GLA compounds can be prepared generally according to Reaction Scheme 3, wherein G12 and G13 are the same or different and independently represent an appropriate protecting group. Removal of the G 5 protecting group of (v) followed by reaction with acid chloride (xiv) produces (xv). Similarly, removal of theGs protecting group from (xv) followed by reaction with acid chloride (xvi) results in (xvii). Deprotection of (xvii) and reaction with acid chloride (xviii) yields (xix). Removal of G 9 and reaction with (xx) then produces the protected GLA compound (xxi). Global deprotection of (xxi) results in a compound of structure (II).
• Reaction Scheme 3 depicts the synthesis of a compound of structure (II), one skilled in the art will recognize that analogous methods may be employed to produce any compound of structure (I). In addition, one skilled in the art will also recognize that with selection of the appropriate protecting groups, the final deprotection results in the desired compound.
• the compounds of the present invention may generally be utilized as the free base or free acid. Alternatively, the compounds of this invention may be used in the form of acid or base addition salts. Acid addition salts of the free amino compounds of the present invention may be prepared by methods well known in the art, and may be formed from organic and inorganic acids. Suitable organic acids include maleic, fumaric, benzoic, ascorbic, succinic, methanesulfonic, acetic, oxalic, propionic, tartaric, salicylic, citric, gluconic, lactic, mandelic, cinnamic, aspartic, stearic, palmitic, glycolic, glutamic, and benzenesulfonic acids. Suitable inorganic acids include hydrochloric, hydrobromic, sulfuric, phosphoric, and nitric acids.
• base addition salts of the acid compounds of the present invention may be prepared by methods well known in the art, and may be formed from organic and inorganic bases.
• Suitable organic bases include, but are not limited to, thethylamine and pyridine.
• Suitable inorganic bases include, but are not limited to, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, and ammonia.
• pharmaceutically acceptable salt of structure (I) is intended to encompass any and all acceptable salt forms.
• prodrugs are also included within the context of this invention.
• Prodrugs are any covalently bonded carriers that release a compound of structure (I) in vivo when such prodrug is administered to a patient.
• Prodrugs are generally prepared by modifying functional groups in a way such that the modification is cleaved, either by routine manipulation or in vivo, yielding the parent compound.
• Prodrugs include, for example, compounds of this invention wherein hydroxy, amine or sulfhydryl groups are bonded to any group that, when administered to a patient, cleaves to form the hydroxy, amine or sulfhydryl groups.
• prodrugs include (but are not limited to) acetate, formate and benzoate derivatives of alcohol and amine functional groups of the compounds of structure (I).
• esters may be employed, such as methyl esters, ethyl esters, and the like.
• the compounds of structure (I) may have chiral centers and may occur as racemates, racemic mixtures and as individual enantiomers or diastereomers. All such isomeric forms are included within the present invention, including mixtures thereof. Furthermore, some of the crystalline forms of the compounds of structure (I) may exist as polymorphs, which are included in the present invention. In addition, some of the compounds of structure (I) may also form solvates with water or other organic solvents. Such solvates are similarly included within the scope of this invention.
• an antigen for use in certain embodiments of the herein described vaccine compositions and methods employing GLA, may be any target epitope, molecule (including a biomolecule), molecular complex (including molecular complexes that contain biomolecules), subcellular assembly, cell or tissue against which elicitation or enhancement of immunreactivity in a subject is desired.
• the term antigen will refer to a polypeptide antigen of interest.
• antigen as used herein, may also refer to a recombinant construct which encodes a polypeptide antigen of interest (e.g, an expression construct).
• the antigen may be, or may be derived from, or may be immunologically cross- reactive with, an infectious pathogen and/or an epitope, biomolecule, cell or tissue that is associated with infection, cancer, autoimmune disease, allergy, asthma, or any other condition where stimulation of an antigen-specific immune response would be desirable or beneficial.
• the vaccine formulations of the present invention contain an antigen or antigenic composition capable of eliciting an immune response against a human or other mammalian pathogen, which antigen or antigenic composition may include a composition derived from a virus such as from HIV-1 , (such as tat, nef, gp120 or gp160), human herpes viruses, such as gD or derivatives thereof or Immediate Early protein such as ICP27 from HSV1 or HSV2, cytomegalovirus ((esp.
• hepatitis virus such as hepatitis B virus (for example Hepatitis B Surface antigen or a derivative thereof), hepatitis A virus, hepatitis C virus and hepatitis E virus, or from other viral pathogens, such as paramyxoviruses: Respiratory Syncytial virus (such as F and G proteins or derivatives thereof), parainfluenza virus, measles virus, mumps virus, human papilloma viruses (for example HPV6, 11 , 16, 18, etc.), flaviviruses ⁇ e.g., Yellow Fever Virus, Dengue Virus, Tick-borne encephalitis virus, Japanese Encephalitis Virus) or Influenza virus (whole live or inactivated virus
• the vaccine formulations of the present invention contain an antigen or antigenic composition capable of eliciting an immune response against a human or other mammlian pathogen, which antigen or antigenic composition may include a composition derived from one or more bacterial pathogens such as Neisseria spp, including N. gonorrhea and N. meningitidis (for example capsular polysaccharides and conjugates thereof, transferrin-binding proteins, lactoferhn binding proteins, PiIC, adhesins); S. pyogenes (for example M proteins or fragments thereof, C5A protease, lipoteichoic acids), S. agalactiae, S. mutans: H.
• Neisseria spp including N. gonorrhea and N. meningitidis
• S. pyogenes for example M proteins or fragments thereof, C5A protease, lipoteichoic acids
• Moraxella spp including M catarrhalis, also known as Branhamella catarrhalis (for example high and low molecular weight adhesins and invasins); Bordetella spp, including B. pertussis (for example pertactin, pertussis toxin or derivatives thereof, filamentous hemagglutinin, adenylate cyclase, fimbriae), B. parapertussis and B. bronchiseptica; Mycobacterium spp., including M. tuberculosis (for example ESAT6, Antigen 85A, -B or -C), M. bovis, M. leprae, M. avium, M.
• M. tuberculosis for example ESAT6, Antigen 85A, -B or -C
• paratuberculosis M. smegmatis; Legionella spp, including L. pneumophila; Escherichia spp, including enterotoxic E. coli (for example colonization factors, heat-labile toxin or derivatives thereof, heat-stable toxin or derivatives thereof), enterohemorragic E. coli, enteropathogenic E. coli (for example Shiga toxin-like toxin or derivatives thereof); Vibrio spp, including V. cholera (for example cholera toxin or derivatives thereof); Shigella spp, including S. sonnei, S. dysenteriae, S. flexnerii; Yersinia spp, including Y.
• enterotoxic E. coli for example colonization factors, heat-labile toxin or derivatives thereof, heat-stable toxin or derivatives thereof
• enterohemorragic E. coli enteropathogenic E. coli
• Vibrio spp including V
• enterocolitica for example a Yop protein
• Y. pestis for example a Yop protein
• Campylobacter spp including C. jejuni (for example toxins, adhesins and invasins) and C. coli
• Salmonella spp including S. typhi, S. paratyphi, S. choleraesuis, S. enteritidis
• Listeria spp. including L. monocytogenes
• Helicobacter spp including H. pylori (for example urease, catalase, vacuolating toxin); Pseudomonas spp, including P.
• Clostridium spp. including C. tetani (for example tetanus toxin and derivative thereof), C. botulinum (for example botulinum toxin and derivative thereof), C. difficile (for example Clostridium toxins A or B and derivatives thereof); Bacillus spp., including B. anthracis (for example botulinum toxin and derivatives thereof); Corynebacterium spp., including C.
• diphtheriae for example diphtheria toxin and derivatives thereof
• Borrelia spp. including B. burgdorferi (for example OspA, OspC, DbpA, DbpB), B. garinii (for example OspA, OspC, DbpA, DbpB), B. afzelii (for example OspA, OspC, DbpA, DbpB), B. andersonii (for example OspA, OspC, DbpA, DbpB), B. hermsii; Ehrlichia spp., including E. equi and the agent of the Human Granulocytic Ehrlichiosis;
• Rickettsia spp including R. rickettsii; Chlamydia spp. including C. trachomatis (for example MOMP, heparin-binding proteins), C. pneumoniae (for example MOMP, heparin-binding proteins), C. psittaci; Leptospira spp., including L. interrogans; Treponema spp., including T. pallidum (for example the rare outer membrane proteins), T. denticola, T. hyodysenteriae; or other bacterial pathogens.
• C. trachomatis for example MOMP, heparin-binding proteins
• C. pneumoniae for example MOMP, heparin-binding proteins
• C. psittaci Leptospira spp., including L. interrogans
• Treponema spp. including T. pallidum (for example the rare outer membrane proteins), T. denticola, T. h
• the vaccine formulations of the present invention contain an antigen or antigenic composition capable of eliciting an immune response against a human or other mammalian pathogen, which antigen or antigenic composition may include a composition derived from one or more parasites (See, e.g., John, DT. and Petri, W.A., Markell and Voge's Medical Parasitology-9 th Ed., 2006, WB Saunders, Philadelphia; Bowman, D. D., Georgis' Parasitology for Veterinarians- ⁇ Ed., 2002, WB Saunders, Philadelphia) such as Plasmodium spp., including P. falciparum; Toxoplasma spp., including T.
• parasites See, e.g., John, DT. and Petri, W.A., Markell and Voge's Medical Parasitology-9 th Ed., 2006, WB Saunders, Philadelphia; Bowman, D. D., Georgis' Parasitology for Veterinarians- ⁇
• gondii for example SAG2, SAG3, Tg34
• Entamoeba spp. including E. histolytica
• Babesia spp. including B. microti
• Trypanosoma spp. including T. cruzi
• Giardia spp. including G. lamblia
• Leishmania spp. including L. major
• Pneumocystis spp. including P.
• nematode infections including, but not limited to, Enterobius vermicularis, Ascaris lumbricoides, Trichuris trichuria, Necator americanus, Ancylostoma duodenale, Wuchereria bancrofti, Brugia malayi, Onchocerca volvulus, Dracanculus medinensis, Trichinella spiralis, and Strongyloides stercoralis
• trematode infections including, but not limited to, Schistosoma mansoni, Schistosoma haematobium, Schistosoma japonicum, Schistosoma mekongi, Opistorchis sinensis, Paragonimus sp, Fasciola hepatica, Fasciola magna, Fasciola gigantic
• Certain embodiments may therefore contemplate vaccine compositions that include an antigen derived from Schisostoma spp., Schistosoma mansonii, Schistosoma haematobium, and/or Schistosoma japonicum, or derived from yeast such as Candida spp., including C. albicans; Cryptococcus spp., including C. neoformans.
• M. tuberculosis preferred specific antigens for M. tuberculosis are for example Th Ra12, Tb H9, Tb Ra35, Tb38-1 , Erd 14, DPV, MTI, MSL, mTTC2 and hTCC1 (WO 99/51748).
• Proteins for M. tuberculosis also include fusion proteins and variants thereof where at least two, preferably three polypeptides of M. tuberculosis are fused into a larger protein.
• Preferred fusions include Ra12-TbH9-Ra35, Erd14-DPV-MTI, DPV-MTI-MSL, Erd14DPV-MTI-MSL- mTCC2, Erd14-DPV-MTI-MSL, DPV-MTI-MSL-mTCC2, TbH9-DPV-MTI (WO 99151748).
• Chlamydia include for example the High Molecular Weight Protein (HWMP) (WO 99/17741 ), ORF3 (EP 366 412), CT622, CT610, pmpD, UVEB and putative membrane proteins (Pmps).
• HWMP High Molecular Weight Protein
• ORF3 EP 366 412
• CT622 CT610
• pmpD UVEB
• Pmps putative membrane proteins
• Other Chlamydia antigens of the vaccine formulation can be selected from the group described in WO 99128475.
• Preferred bacterial vaccines comprise antigens derived from Streptococcus spp, including S.
• pneumoniae for example capsular polysaccharides and conjugates thereof, PsaA, PspA, PdB, streptolysin, choline-binding proteins
• Pneumolysin Biochem Biophys Acta, 1989, 67, 1007; Rubins et al., Microbial Pathogenesis, 25, 337-342
• mutant detoxified derivatives thereof WO 90/06951 ; WO 99/03884
• Other preferred bacterial vaccines comprise antigens derived from Haemophilus spp., including H. influenzae type B (for example PRP and conjugates thereof), nontypeable H.
• influenzae for example OMP26, high molecular weight adhesins, P5, P6, protein D and lipoprotein D, and fimbrin and fimbrin derived peptides (U.S. Pat. No. 5,843,464) or multiple copy variants or fusion proteins thereof.
• the vaccine formulation of the invention comprises the HIV-1 antigen, gp120, especially when expressed in CHO cells.
• the vaccine formulation of the invention comprises gD2t as hereinabove defined.
• vaccines containing the claimed adjuvant comprise antigen derived from the Human Papilloma Virus (HPV) considered to be responsible for genital warts (HPV 6 or HPV 11 and others), and the HPV viruses responsible for cervical cancer (HPV16, HPV18 and others).
• HPV Human Papilloma Virus
• Particularly preferred forms of genital wart prophylactic, or therapeutic, vaccine comprise L1 particles or capsomers, and fusion proteins comprising one or more antigens selected from the HPV 6 and HPV 11 proteins E6, E7, L1 , and L2.
• fusion protein include L2E7 as disclosed in WO 96/26277, and proteinD(1/3)-E7 disclosed in GB 9717953.5 (PCT/EP98/05285).
• a preferred HPV cervical infection or cancer, prophylaxis or therapeutic vaccine, composition may comprise HPV 16 or 18 antigens.
• VLP virus like particle
• Such antigens, virus like particles and capsomer are perse known. See for example WO94/00152, WO94/20137, WO94/05792, and WO93/02184.
• Additional early proteins may be included alone or as fusion proteins such as E7, E2 or preferably F5 for example; particularly preferred embodiments include a VLP comprising L1 E7 fusion proteins (WO 96/11272).
• Particularly preferred HPV 16 antigens comprise the early proteins E6 or F7 in fusion with a protein D carrier to form Protein D-E6 or E7 fusions from HPV 16, or combinations thereof; or combinations of E6 or E7 with L2 (WO 96/26277).
• the HPV 16 or 18 early proteins E6 and E7 may be presented in a single molecule, preferably a Protein D-E6/E7 fusion.
• Such vaccine may optionally contain either or both E6 and E7 proteins front HPV 18, preferably in the form of a Protein D-E6 or Protein D-E7 fusion protein or Protein D E6/E7 fusion protein.
• the vaccine of the present invention may additionally comprise antigens from other HPV strains, preferably from strains HPV 31 or 33.
• Vaccines of the present invention further comprise antigens derived from parasites that cause Malaria.
• preferred antigens from Plasmodia falciparum include RTS 1 S and TRAP.
• RTS is a hybrid protein comprising substantially all the C-terminal portion of the circumsporozoite (CS) protein of P.falciparum linked via four amino acids of the preS2 portion of Hepatitis B surface antigen to the surface (S) antigen of hepatitis B virus. Its full structure is disclosed in the International Patent Application No. PCT/EP92/02591 , published as WO 93/10152 claiming priority from UK patent application No.9124390.7. When expressed in yeast RTS is produced as a lipoprotein particle, and when it is co-expressed with the S antigen from HBV it produces a mixed particle known as RTS 1 S.
• TRAP antigens are described in the International Patent Application No. PCT/GB89/00895 published as WO 90/01496.
• a preferred embodiment of the present invention is a Malaria vaccine wherein the antigenic preparation comprises a combination of the RTS 1 S and TRAP antigens.
• Other Plasmodia antigens that are likely candidates to be components of a multistage Malaria vaccine are P.
• an antigen that is derived from at least one infectious pathogen such as a bacterium, a virus or a fungus, including an Actinobacterium such as M. tuberculosis or M. leprae or another mycobacterium; a bacterium such as a member of the genus Salmonella, Neisseria, Borrelia, Chlamydia or Bordetella; a virus such as a herpes simplex virus, a human immunodeficiency virus (HIV), a feline immunodeficiency virus (FIV), cytomegalovirus, Varicella Zoster Virus, hepatitis virus, Epstein Barr Virus (EBV), respiratory syncytial virus, human papilloma virus (HPV) and a cytomegalovirus; HIV such as HIV-1 or HIV-2; a fungus such as Aspergillus, Blastomyces, Coccidioides and Pneumocysti or another mycobacterium; a bacter
• a parasite such as a protozoan, for example, a Plasmodium species including P. falciparum, P. vivax, P. malariae and P.
• ovale or another parasite such as one or more of Acanthamoeba, Entamoeba histolytica, Angiostrongylus, Schistosoma mansonii, Schistosoma haematobium, Schistosoma japonicum, Cryptosporidium, Ancylostoma, Entamoeba histolytica, Entamoeba coli, Entamoeba dispar, Entamoeba hartmanni, Entamoeba polecki, Wuchereria bancrofti, Giardia, and Leishmania.
• another parasite such as one or more of Acanthamoeba, Entamoeba histolytica, Angiostrongylus, Schistosoma mansonii, Schistosoma haematobium, Schistosoma japonicum, Cryptosporidium, Ancylostoma, Entamoeba histolytica, Entamoeba coli, Entamoeba dispar, Entam
• the antigens may include nucleic acid, pathogen derived antigen or antigenic preparations, recombinantly produced protein or peptides, and chimeric fusion proteins.
• One such antigen is OspA.
• the OspA may be a full mature protein in a lipidated form by virtue of its biosynthesis in a host cell (Lipo-OspA) or may alternatively be a non-lipidated derivative.
• non-lipidated derivatives include the non-lipidated NS1 -OspA fusion protein which has the first 81 N-terminal amino acids of the nonstructural protein (NS1 ) of the influenza virus, and the complete OspA protein, and another, MDP-OspA is a non-lipidated form of OspA carrying 3 additional N-terminal amino acids.
• compositions and methods are known in the art for identifying subjects having, or suspected of being at risk for having, an infection with an infectious pathogen as described herein.
• TB tuberculosis
• the bacteria usually attack the lungs but can also attack the kidney, spine, and brain. If not treated properly, TB disease can be fatal. The disease is spread from one person to another in the air when an infected person sneezes or coughs. In 2003, more than 14,000 cases of TB were reported in the United States.
• tuberculosis can generally be controlled using extended antibiotic therapy, such treatment is not sufficient to prevent the spread of the disease and concerns exist regarding the potential selection for antibiotic- resistant strains.
• Infected individuals may be asymptomatic, but contagious, for some time.
• compliance with the treatment regimen is critical, patient behavior is difficult to monitor.
• Some patients do not complete the course of treatment, which can lead to ineffective treatment and the development of drug resistance, (e.g., U.S. Patent 7,087,713)
• BCG Bacillus Calmette-Guehn
• Mycobacterium bovis an avirulent strain of Mycobacterium bovis.
• PPD protein-purified derivative
• T cells While macrophages have been shown to act as the principal effectors of M. tuberculosis immunity, T cells are the predominant inducers of such immunity.
• the essential role of T cells in protection against M. tuberculosis infection is illustrated by the frequent occurrence of M. tuberculosis in AIDS patients, due to the depletion of CD4 T cells associated with human immunodeficiency virus (HIV) infection.
• Mycobacterium-reactive CD4 T cells have been shown to be potent producers of gamma-interferon (IFN-gamma), which, in turn, has been shown to trigger the anti-mycobacterial effects of macrophages in mice.
• IFN-gamma gamma-interferon
• IFN-gamma While the role of IFN-gamma in humans is less clear, studies have shown that 1 ,25-dihydroxy-vitamin D3, either alone or in combination with IFN-gamma or tumor necrosis factor-alpha, activates human macrophages to inhibit M. tuberculosis infection. Furthermore, it is known that IFN-gamma stimulates human macrophages to make 1 ,25-dihydroxy-vitamin D3. Similarly, IL-12 has been shown to play a role in stimulating resistance to
• M. tuberculosis infection For a review of the immunology of M. tuberculosis infection, see Chan and Kaufmann, in Tuberculosis: Pathogenesis, Protection and Control, Bloom (ed.), ASM Press. Washington, D.C. (1994).
• Existing compounds and methods for diagnosing tuberculosis or for inducing protective immunity against tuberculosis include the use of polypeptides that contain at least one immunogenic portion of one or more Mycobacterium proteins and DNA molecules encoding such polypeptides. Diagnostic kits containing such polypeptides or DNA sequences and a suitable detection reagent may be used for the detection of Mycobacterium infection in patients and biological samples. Antibodies directed against such polypeptides are also provided. In addition, such compounds may be formulated into vaccines and/or pharmaceutical compositions for immunization against Mycobacterium infection. (U.S. Patent Nos. 6,949,246 and 6,555,653).
• Malaria is usually transmitted when a person is bitten by an infected female Anopheles mosquito. To transmit the mosquito must have been infected by having drawn blood from a person already infected with malaria. Malaria is caused by a parasite and the clinical symptoms of the disease include fever and flu-like illness, such as chills, headache, muscle aches, and tiredness. These symptoms may be accompanied by nausea, vomiting, and diarrhea. Malaria can also cause anemia and jaundice because of the loss of red blood cells. Infection with one type of malaria, Plasmodium falciparum, if not promptly treated, may cause kidney failure, seizures, mental confusion, coma, and death.
• An in vitro diagnostic method for malaria in an individual comprising placing a tissue or a biological fluid taken from an individual in contact with a molecule or polypeptide composition, wherein said molecule or polypeptide composition comprises one or more peptide sequences bearing all or part of one or more T epitopes of the proteins resulting from the infectious activity of P. falciparum, under conditions allowing an in vitro immunological reaction to occur between said composition and the antibodies that may be present in the tissue or biological fluid, and in vitro detection of the antigen- antibody complexes formed (see, e.g., U.S. Patent 7,087,231 ).
• AMA-1 ectodomain a recombinant Plasmodium falciparum (3D7) AMA-1 ectodomain have been described. Previous methods have produced a highly purified protein which retains folding and disulfide bridging of the native molecule.
• the recombinant AMA-1 is useful as a diagnostic reagentas well as in antibody production, and as a protein for use alone, or as part of, a vaccine to prevent malaria. (U.S. Patent 7,029,685)
• Polynucleotides have been described in the art that encode species-specific P. vivax malarial peptide antigens which are proteins or fragments of proteins secreted into the plasma of a susceptible mammalian host after infection, as have monoclonal or polyclonal antibodies directed against these antigens.
• the peptide antigens, monoclonal antibodies, and/or polyclonal antibodies are utilized in assays used to diagnose malaria, as well as to determine whether Plasmodium vivax is the species responsible for the infection. (U.S. Patent 6,706,872) Species-specific P.
• vivax malarial peptide antigens have also been reported which are proteins or fragments of proteins secreted into the plasma of a susceptible mammalian host after infection, as have monoclonal or polyclonal antibodies directed against these antigens.
• the peptide antigens, monoclonal antibodies, and/or polyclonal antibodies are utilized in assays used to diagnose malaria, as well as to determine whether Plasmodium vivax is the species responsible for the infection (see, e.g., U.S. Patent 6,231 ,861 ).
• a recombinant Plasmodium falciparum (3D7) AMA-1 ectodomain has also been expressed by a method that produces a highly purified protein which retains folding and disulfide bridging of the native molecule.
• the recombinant AMA-1 is useful as a diagnostic reagent, for use in antibody production, and as a vaccine.
• U.S. Patent 7,060,276 Similarly known are the expression and purification of a recombinant Plasmodium falciparum (3D7) MSP-1 4 2, which retains folding and disulfide bridging of the native molecule.
• the recombinant MSP-1 4 2 is useful as a diagnostic reagent, for use in antibody production, and as a vaccine.
• U.S. Patent 6,855,322 U.S. Patent 6,855,322
• Diagnostic methods for the detection of human malaria infections to identify a subject having or suspected of being at risk for having an infection with a malaria infectious pathogen are thus known according to these and related disclosures.
• blood samples are combined with a reagent containing 3-acetyl pyridine adenine dinucleotide (APAD), a substrate (e.g. a lactate salt or lactic acid), and a buffer.
• APAD 3-acetyl pyridine adenine dinucleotide
• substrate e.g. a lactate salt or lactic acid
• the reagent is designed to detect the presence of a unique glycolytic enzyme produced by the malaria parasite. This enzyme is known as parasite lactic acid dehydrogenase (PLDH).
• PLDH is readily distinguishable from host LDH using the above- described reagent.
• APAD is not reduced by host LDH.
• the reduced APAD may then be detected by various techniques, including spectral, fluorimetric, electrophoretic, or colorimetric analysis. Detection of the reduced APAD in the foregoing manner provides a positive indication of malaria infection ⁇ e.g., U.S. Patent 5,124,141 ).
• a polypeptide comprising a characteristic amino acid sequence derived from the Plasmodium falciparum antigen GLURP, is recognized in a test sample by a specific antibody raised against or reactive with the polypeptide.
• Leishmaniasis is a widespread parasitic disease with frequent epidemics in the Indian subcontinent, Africa, and Latin America and is a World Health Organization priority for vaccine development.
• a complex of different diseases, Leishmania parasites cause fatal infections of internal organs, as well as serious skin disease.
• One of the most devastating forms of leishmaniasis is a disfiguring infection of the nose and mouth.
• the number of cases of leishmaniasis is increasing, and it is now out of control in many areas.
• Leishmaniasis is also on the rise in some developed countries, specifically southern Europe as a result of HIV infection. Available drugs are toxic, expensive, and require long-term daily injections.
• Leishmania are protozoan parasites that inhabit macrophages or the white blood cells of the immune system.
• the parasites are transmitted by the bite of small blood sucking insects (sand flies), which are difficult to control, as they inhabit vast areas of the planet.
• Visceral leishmaniasis is the most dangerous of the three manifestations of the disease. It is estimated that about 500,000 new cases of the visceral form (kala-azar or "the killing disease") occur each year. More than 200 million people are currently at risk for contracting visceral leishmaniasis. Over 90 percent of visceral leishmaniasis cases occur in India, Bangladesh, Sudan, Brazil, and Nepal. Most of the deaths occur in children. Those with the cutaneous forms are often left permanently disfigured.
• HIV human immunodeficiency virus
• HIV human immunodeficiency virus
• the most robust solution to the problem is preventing the virus from spreading.
• Making a safe, effective, and affordable HIV vaccine is one way to reach this goal. Across the world, fewer than one in five people at high risk for HIV infection have access to effective prevention.
• the vaccine compositions and related formulations and methods of use may include an antigen that is derived from a cancer cell, as may be useful for the immunotherapeutic treatment of cancers.
• the adjuvant formulation may finds utility with tumor rejection antigens such as those for prostate, breast, colorectal, lung, pancreatic, renal or melanoma cancers.
• Exemplary cancer or cancer cell-derived antigens include MAGE 1 , 3 and MAGE 4 or other MAGE antigens such as those disclosed in WO99/40188, PRAME, BAGE, Lü (also known as NY Eos 1 ) SAGE and HAGE (WO 99/53061 ) or GAGE (Robbins and Kawakami, 1996 Current Opinions in Immunology 8, pps 628-636; Van den Eynde et al., International Journal of Clinical & Laboratory Research (1997 & 1998); Correale et al. (1997), Journal of the National Cancer Institute 89, p. 293.
• These non-limiting examples of cancer antigens are expressed in a wide range of tumor types such as melanoma, lung carcinoma, sarcoma and bladder carcinoma. See, e.g., U.S. Patent No. 6,544,518.
• tumor-specific antigens are suitable for use with GLA according to certain presently disclosed embodiments include, but are not restricted to, tumor-specific or tumor-associated gangliosides such as GM 2 , and GM 3 or conjugates thereof to carrier proteins; or an antigen for use in a GLA vaccine composition for eliciting or enhancing an anti-cancer immune response may be a self peptide hormone such as whole length Gonadotrophin hormone releasing hormone (GnRH, WO 95/20600), a short 10 amino acid long peptide, useful in the treatment of many cancers.
• prostate antigens are used, such as Prostate specific antigen (PSA), PAP, PSCA (e.g., Proc. Nat. Acad. Sci.
• PSMA or, in a preferred embodiment an antigen known as Prostase.
• Prostase e.g., Nelson, et al., Proc. Natl. Acad. Sci. USA (1999) 96: 3114-3119; Ferguson, et al. Proc. Natl. Acad. Sci. USA 1999. 96, 3114-3119; WO 98/12302; U.S. Pat. No. 5,955,306; WO 98/20117; U.S. Pat. Nos. 5,840,871 and 5,786,148; WO 00/04149.
• Other prostate specific antigens are known from WO 98/137418, and WO/004149.
• Another is STEAP PNAS 96 14523 14528 7-12 1999).
• tumor associated antigens useful in the context of the present invention include: PIu -1 (J Biol. Chem 21 A (22) 15633 -15645, 1999), HASH -1 , HasH-2, Cripto (Salomon et al Bioessays 199, 21 :61 -70, U.S. Pat. No. 5,654,140) and Criptin (U.S. Pat. No. 5,981 ,215). Additionally, antigens particularly relevant for vaccines in the therapy of cancer also comprise tyrosinase and survivin.
• GLA-containing vaccine compositions comprising a cancer antigen will be useful against any cancer characterized by tumor associated antigen expression, such as HER- 2/neu expression or other cancer-specific or cancer-associated antigens.
• Diagnosis of cancer in a subject having or suspected of being at risk for having cancer may be accomplished by any of a wide range of art- accepted methodologies, which may vary depending on a variety of factors including clinical presentation, degree of progression of the cancer, the type of cancer, and other factors.
• cancer diagnostics include histopathological, histocytochemical, immunohistocytochemical and immunohistopathological examination of patient samples (e.g., blood, skin biopsy, other tissue biopsy, surgical specimens, etc.), PCR tests for defined genetic ⁇ e.g., nucleic acid) markers, serological tests for circulating cancer- associated antigens or cells bearing such antigens, or for antibodies of defined specificity, or other methodologies with which those skilled in the art will be familiar.
• Vaccine compositions and methods according to certain embodiments of the present invention may also be used for the prophylaxis or therapy of autoimmune diseases, which include diseases, conditions or disorders wherein a host's or subject's immune system detrimentally mediates an immune response that is directed against "self tissues, cells, biomolecules (e.g., peptides, polypeptides, proteins, glycoproteins, lipoproteins, proteolipids, lipids, glycolipids, nucleic acids such as RNA and DNA, oligosaccharides, polysaccharides, proteoglycans, glycosaminoglycans, or the like, and other molecular components of the subjects cells and tissues) or epitopes (e.g., specific immunologically defined recognition structures such as those recognized by an antibody variable region complementarity determining region (CDR) or by a T cell receptor CDR.
• autoimmune diseases include diseases, conditions or disorders wherein a host's or subject's immune system detrimentally mediates an immune response that is directed
• Autoimmune diseases are thus characterized by an abnormal immune response involving either cells or antibodies, that are in either case directed against normal autologous tissues.
• Autoimmune diseases in mammals can generally be classified in one of two different categories: cell-mediated disease (i.e., T-cell) or antibody-mediated disorders.
• cell-mediated autoimmune diseases include multiple sclerosis, rheumatoid arthritis, Hashimoto thyroiditis, type I diabetes mellitus (Juvenile onset diabetes) and autoimmune uvoretinitis.
• Antibody-mediated autoimmune disorders include, but are not limited to, myasthenia gravis, systemic lupus erythematosus (or SLE), Graves' disease, autoimmune hemolytic anemia, autoimmune thrombocytopenia, autoimmune asthma, cryoglobulinemia, thrombic thrombocytopenic purpura, primary biliary sclerosis and pernicious anemia.
• the antigen(s) associated with: systemic lupus erythematosus is small nuclear ribonucleic acid proteins (snRNP); Graves' disease is the thyrotropin receptor, thyroglobulin and other components of thyroid epithelial cells (Akamizu et al., 1996; Kellerman et al., 1995; Raju et al., 1997; and Texier et al., 1992); pemphigus is cadherin-like pemphigus antigens such as desmoglein 3 and other adhesion molecules (Memar et al., 1996: Stanley, 1995; Plott et al., 1994; and Hashimoto, 1993); and thrombic thrombocytopenic purpura is antigens of platelets.
• snRNP small nuclear ribonucleic acid proteins
• Graves' disease is the thyrotropin receptor, thyroglobulin and other components of thyroid epitheli
• Autoimmunity plays a role in more than 80 different diseases, including type 1 diabetes, multiple sclerosis, lupus, rheumatoid arthritis, scleroderma, and thyroid diseases. Vigorous quantitative estimates of morbidity for most autoimmune diseases are lacking. Most recent studies done in the late 1990s reveal that autoimmune diseases are the third most common major illness in the United States; and the most common autoimmune diseases affect more than 8.5 million Americans. Current estimates of the prevalence of the disease range from 5 to 8 percent of the United States population. Most autoimmune diseases disproportionately affect women. Women are 2.7 times more likely than men to acquire an autoimmune disease. Women are more susceptible to autoimmune diseases; men appear to have higher levels of natural killer cell activity than do women. (Jacobsen et al, Clinical Immunology and Immunopathology, 84:223-243, 1997.)
• Autoimmune diseases occur when the immune system mistakes self tissues for nonself and mounts an inappropriate attack.
• the body can be affected in different ways from autoimmune diseases, including, for example, the gut (Crohn's disease) and the brain (multiple sclerosis).
• autoimmune diseases including, for example, the gut (Crohn's disease) and the brain (multiple sclerosis).
• an autoantibody attacks self-cells or self-tissues to injure their function and as a result causes autoimmune diseases, and that the autoantibody may be detected in the patient's serum prior to the actual occurrence of an autoimmune disease ⁇ e.g., appearance of clinical signs and symptoms). Detection of an autoantibody thus permits early discovery or recognition of presence or risk for developing an autoimmune disease.
• compositions of the invention will be particularly applicable in treatment of the elderly and/or the immunosuppressed, including subjects on kidney dialysis, subjects on chemo-therapy and/or radiation therapy, transplant recipients, and the like. Such individuals generally exhibit diminished immune responses to vaccines and therefore use of the compositions of the invention can enhance the immune responses achieved in these subjects.
• the antigen or antigens used in the compositions of the invention include antigens associated with respiratory diseases, such as those caused or exacerbated by bacterial infection (e.g. pneumococcal), for the prophylaxis and therapy of conditions such as chronic obstructive pulmonary disease (COPD).
• COPD chronic obstructive pulmonary disease
• COPD is defined physiologically by the presence of irreversible or partially reversible airway obstruction in patients with chronic bronchitis and/or emphysema (Am J Respir Crit Care Med. 1995 Nov;152(5 Pt 2):S77-121 ). Exacerbations of COPD are often caused by bacterial (e.g. pneumococcal) infection (Clin Microbiol Rev. 2001 Apr;14(2):336- 63).
• a composition of the invention comprises a GLA adjuvant, as described herein, in combination with the Pneumococcal vaccine Prevnar ® (Wyeth).
• compositions of the invention are used in the treatment of allergic conditions.
• the compositions are used in allergy desensitization therapy.
• Such therapy involves the stimulation of the immune system with gradually increasing doses of the substances to which a person is allergic, wherein the substances are formulated in compositions comprising GLA.
• the compositions are used in the treatment of allergies to food products, pollen, mites, cats or stinging insects (e.g., bees, hornets, yellow jackets, wasps, velvet ants, fire ants).
• certain embodiments of the present invention contemplate vaccine compositions and immunological adjuvant compositions, including pharmaceutical compositions, that include, in addition to the GLA compound(s) of the invention, one or more toll-like receptor agonist
• TLR agonist Toll-like receptors
• TLR include cell surface transmembrane receptors of the innate immune system that confer early-phase recognition capability to host cells for a variety of conserved microbial molecular structures such as may be present in or on a large number of infectious pathogens, ⁇ e.g., Armant et al., 2002 Genome Biol. 3(8):reviews3011.1-3011.6; Fearon et al., 1996 Science 272:50; Medzhitov et al., 1997 Curr. Opin. Immunol. 9:4; Luster 2002 Curr. Opin. Immunol. 14:129; Lien et al. 2003 Nat. Immunol. 4:1162; Medzhitov, 2001 Nat.
• TLR agonists which engage cell surface TLR.
• lipopolysacchahde may be a TLR agonist through TLR2 or TLR4 (Tsan et al., 2004 J. Leuk. Biol. 76:514; Tsan et al., 2004 Am. J. Physiol. Cell Physiol.
• poly(inosine-cytidine) may be a TLR agonist through TLR3 (Salem et al., 2006 Vaccine 24:5119); CpG sequences (oligodeoxynucleotides containing unmethylated cytosine-guanosine or "CpG" dinucleotide motifs, e.g., CpG 7909, Cooper et al., 2005 AIDS 19:1473; CpG 10101 Bayes et al. Methods Find Exp Clin Pharmacol 27:193; Vollmer et al.
• TLR agonists may be TLR9 (Andaloussi et a., 2006 GHa 54:526; Chen et al., 2006 J. Immunol. 177:2373); peptidoglycans may be TLR2 and/or TLR6 agonists (Soboll et al., 2006 Biol. Reprod. 75:131 ; Nakao et al., 2005 J. Immunol.
• 3M003 (4-amino-2-(ethoxymethyl)- ⁇ , ⁇ -dimethyl- 6,7,8,9-tetrahydro-1 H-imidazo[4,5-c]quinoline-1-ethanol hydrate, MoI. Wt. 318 Da from 3M Pharmaceuticals, St. Paul, MN, which is also a source of the related compounds 3M001 and 3M002; Gorden et al., 2005 J. Immunol. 174:1259) may be a TLR7 agonist (Johansen 2005 CHn. Exp. Allerg. 35:1591 ) and/or a TLR8 agonist (Johansen 2005); flagellin may be a TLR5 agonist
• TLR7 and/or TLR9 may act as TLR agonists through TLR7 and/or TLR9 (Lee et al., 2006 Proc. Nat. Acad. Sci. USA 103:1828; Horsmans et al., 2005 Hepatol. 42:724).
• Other TLR agonists are known ⁇ e.g., Schirmbeck et al., 2003 J. Immunol. 171 :5198) and may be used according to certain of the presently described embodiments.
• CpG immunostimulatory oligonucleotides containing unmethylated CpG dinucleotides
• CpG immunostimulatory oligonucleotides containing unmethylated CpG dinucleotides
• the central role of the CG motif in immunostimulation was elucidated by Krieg, Nature 374, p546 1995. Detailed analysis has shown that the CG motif has to be in a certain sequence context, and that such sequences are common in bacterial DNA but are rare in vertebrate DNA.
• the immunostimulatory sequence is often: Purine, Purine, C, G, pyhmidine, pyhmidine; wherein the dinucleotide CG motif is not methylated, but other unmethylated CpG sequences are known to be immunostimulatory and may be used in certain embodiments of the present invention.
• CpG when formulated into vaccines may be administered in free solution together with free antigen (WO 96/02555; McCluskie and Davis, supra) or covalently conjugated to an antigen (PCT Publication No. WO 98/16247), or formulated with a carrier such as aluminium hydroxide (e.g., Davis et al. supra, Brazolot-Millan et al., Proc. Natl. Acad. Sci., USA, 1998, 95(26), 15553-8).
• a carrier such as aluminium hydroxide
• the preferred oligonucleotides for use in adjuvants or vaccines of the present invention preferably contain two or more dinucleotide CpG motifs separated by at least three, more preferably at least six or more nucleotides.
• the oligonucleotides of the present invention are typically deoxynucleotides.
• the internucleotide in the oligonucleotide is phosphorodithioate, or more preferably a phosphorothioate bond, although phosphodiester and other internucleotide bonds are within the scope of the invention including oligonucleotides with mixed internucleotide linkages. Methods for producing phosphorothioate oligonucleotides or phosphorodithioate are described in U.S. Pat. Nos. 5,666,153, 5,278,302 and WO95/26204.
• oligonucleotides have sequences that are disclosed in the following publications; for certain herein disclosed embodiments the sequences preferably contain phosphorothioate modified internucleotide linkages:
• CPG 7909 Cooper et al., "CPG 7909 adjuvant improves hepatitis B virus vaccine seroprotection in antiretroviral-treated HIV-infected adults.” AIDS, 2005 Sep 23;19(14):1473-9.
• Alternative CpG oligonucleotides may comprise variants of the preferred sequences described in the above-cited publications that differ in that they have inconsequential nucleotide sequence substitutions, insertions, deletions and/or additions thereto.
• the CpG oligonucleotides utilized in certain embodiments of the present invention may be synthesized by any method known in the art ⁇ e.g., EP 468520). Conveniently, such oligonucleotides may be synthesized utilizing an automated synthesizer.
• the oligonucleotides are typically deoxynucleotides.
• the internucleotide bond in the oligonucleotide is phosphorodithioate, or more preferably phosphorothioate bond, although phosphodiesters are also within the scope of the presently contemplated embodiments.
• Oligonucleotides comprising different internucleotide linkages are also contemplated, e.g., mixed phosphorothioate phosphodiesters.
• Other internucleotide bonds which stabilize the oligonucleotide may also be used.
• Certain embodiments as provided herein include vaccine compositions and immunological adjuvant compositions, including pharmaceutical compositions, that contain, in addition to GLA compound(s), at least one co-adjuvant, which refers to a component of such compositions that has adjuvant activity but that is other than GLA.
• a co-adjuvant having such adjuvant activity includes a composition that, when administered to a subject such as a human (e.g., a human patient), a non-human primate, a mammal or another higher eukaryotic organism having a recognized immune system, is capable of altering (i.e., increasing or decreasing in a statistically significant manner, and in certain preferred embodiments, enhancing or increasing) the potency and/or longevity of an immune response.
• GLA and a desired antigen, and optionally one or more co-adjuvants may so alter, e.g., elicit or enhance, an immune response that is directed against the desired antigen which may be administered at the same time as GLA or may be separated in time and/or space (e.g., at a different anatomic site) in its administration, but certain invention embodiments are not intended to be so limited and thus also contemplate administration of GLA in a composition that does not include a specified antigen but which may also include one or more of a TLR agonist, a co-adjuvant, an imidazoquinline immune response modifier, and a double stem loop immune modifier (dSLIM).
• dSLIM double stem loop immune modifier
• co-adjuvants include compositions other than GLA that have adjuvant effects, such as saponins and saponin mimetics, including QS21 and QS21 mimetics (see, e.g., U.S. Pat. No.
• alum plant alkaloids such as tomatine, detergents such as (but not limited to) saponin, polysorbate 80, Span 85 and stearyl tyrosine, one or more cytokines (e.g., GM-CSF, IL-2, IL-7, IL-12, TNF-alpha, IFN-gamma), an imidazoquinoline immune response modifier, and a double stem loop immune modifier (dSLIM, e.g., Weeratna et al., 2005 Vaccine 23:5263).
• cytokines e.g., GM-CSF, IL-2, IL-7, IL-12, TNF-alpha, IFN-gamma
• dSLIM double stem loop immune modifier
• Detergents including saponins are taught in, e.g., U.S. Patent 6,544,518; Lacaille-Dubois, M and Wagner H. (1996 Phytomedicine 2:363-386), U.S. Pat. No. 5,057,540 , Kensil, Crit Rev Ther Drug Carrier Syst, 1996, 12 (1 - 2):1 -55, and EP 0 362 279 B1.
• Particulate structures termed Immune Stimulating Complexes (ISCOMS), comprising fractions of Quil A (saponin) are haemolytic and have been used in the manufacture of vaccines (Morein, B., EP 0 109 942 B1 ).
• Combinations of QS21 and polysorbate or cyclodextrin are also known (WO 99/10008).
• Particulate adjuvant systems comprising fractions of QuilA, such as QS21 and QS7 are described in WO 96/33739 and WO 96/11711.
• Other saponins which have been used in systemic vaccination studies include those derived from other plant species such as Gypsophila and Saponaria (Bomford et al., Vaccine, 10(9):572-577, 1992).
• Escin is another detergent related to the saponins for use in the adjuvant compositions of the embodiments herein disclosed. Escin is described in the Merck index (12 th Ed.: entry 3737) as a mixture of saponin occurring in the seed of the horse chestnut tree, Aesculus hippocastanum. Its isolation is described by chromatography and purification (Fiedler, Arzneistoff- Forsch. 4, 213 (1953)), and by ion-exchange resins (Erbring et al., U.S. Pat. No. 3,238,190). Fractions of escin (also known as aescin) have been purified and shown to be biologically active (Yoshikawa M, et al.
• Digitonin is another detergent, also being described in the Merck index (12th Ed., entry 3204) as a saponin, being derived from the seeds of Digitalis purpurea and purified according to the procedure described by Gisvold et al., J. Am. Pharm.Assoc, 1934, 23, 664; and Rubenstroth-Bauer, Physiol. Chem., 1955, 301 , 621.
• co-adjuvants for use according to certain herein disclosed embodiments include a block co-polymer or biodegradable polymer, which refers to a class of polymeric compounds with which those in the relevant art will be familiar.
• a block co-polymer or biodegradable polymer that may be included in a GLA vaccine composition or a GLA immunological adjuvant include Pluronic® L121 (BASF Corp., Mount Olive, NJ; see, e.g., Yeh et al., 1996 Pharm. Res. 13:1693; U.S. Patent No. 5,565,209), CRL1005 ⁇ e.g., Triozzi et al., 1997 Clin Cane. Res.
• poly(lactic-co-glycolic acid) PLGA
• poly(lactic acid) PLA
• poly-(D,L-lactide-co-glycolide) PLA
• polyl:C poly(See, e.g., Powell and Newman, "Vaccine design - The Subunit and Adjuvant Approach", 1995, Plenum Press, New York)
• Certain embodiments contemplate GLA vaccines and GLA immunological adjuvants that include an oil, which in some such embodiments may contribute co-adjuvant activity and in other such embodiments may additionally or alternatively provide a pharmaceutically acceptable carrier or excipient.
• oils Any number of suitable oils are known and may be selected for inclusion in vaccine compositions and immunological adjuvant compositions based on the present disclosure. Examples of such oils, by way of illustration and not limitation, include squalene, squalane, mineral oil, olive oil, cholesterol, and a mannide monooleate.
• Immune response modifiers such as imidazoquinoline immune response modifiers are also known in the art and may also be included as co- adjuvants in certain presently disclosed embodiments.
• Certain preferred imidazoquinoline immune response modifiers include, by way of non-limiting example, resiquimod (R848), imiquimod and gardiquimod (Hemmi et al., 2002 Nat. Immunol. 3:196; Gibson et al., 2002 Cell. Immunol. 218:74; Gorden et al.,
• dSLIM nucleic acid-based double stem loop immune modifiers
• one type of co-adjuvant for use with GLA as described herein may be the aluminum co-adjuvants, which are generally referred to as "alum.”
• Alum co-adjuvants are based on the following: aluminum oxy-hydroxide; aluminum hydroxyphosphoate; or various proprietary salts.
• Vaccines that use alum co-adjuvants may include vaccines for tetanus strains, HPV, hepatitis A, inactivated polio virus, and other antigens as described herein.
• Alum co-adjuvants are advantageous because they have a good safety record, augment antibody responses, stabilize antigens, and are relatively simple for large-scale production. (Edelman 2002 MoI. Biotechnol. 21 :129-148; Edelman, R. 1980 Rev. Infect. Dis. 2:370-383.)
• co-adjuvants that may be combined with GLA for effective immune stimulation include saponins and saponin mimetics, including QS21 and structurally related compounds conferring similar effects and referred to herein as QS21 mimetics.
• QS21 has been recognized as a preferred co- adjuvant.
• QS21 may comprise an HPLC purified non-toxic fraction derived from the bark of Quillaja Saponaria Molina. The production of QS21 is disclosed in U.S. Pat. No. 5,057,540. (See also U.S. Patent Nos. 6,936,255, 7,029,678 and 6,932,972.)
• GLA may also in certain embodiments be combined with "immunostimulatory complexes" known as ISCOMS (e.g., U.S. Patent Nos. 6,869,607, 6,846,489, 6,027,732, 4,981 ,684), including saponin-derived ISCOMATRIX®, which is commercially available, for example, from lscotec (Stockholm, Sweden) and CSL Ltd. (Parkville, Victoria, Australia).
• ISCOMS immunosys
• saponin-derived ISCOMATRIX® which is commercially available, for example, from lscotec (Stockholm, Sweden) and CSL Ltd. (Parkville, Victoria, Australia).
• the GLA vaccine composition may contain at least one recombinant expression construct which comprises a promoter operably linked to a nucleic acid sequence encoding an antigen.
• the recombinant expression construct is present in a viral vector, such as an adenovirus, adeno-associated virus, herpesvirus, lentivirus, poxvirus or retrovirus vector.
• a viral vector such as an adenovirus, adeno-associated virus, herpesvirus, lentivirus, poxvirus or retrovirus vector.
• Compositions and methods for making and using such expression constructs and vectors are known in the art, for the expression of polypeptide antigens as provided herein, for example, according to Ausubel et al. (Eds.), Current Protocols in Molecular Biology, 2006 John Wiley & Sons, NY.
• Non-limiting examples of recombinant expression constructs generally can be found, for instance, in U.S. Patent Nos. 6,844,192; 7,037,712; 7,052,904; 7,001 ,770; 6,106,824; 5,693,531 ; 6,613,892; 6,875,610; 7,067,310; 6,218,186; 6,783,981 ; 7,052,904; 6,783,981 ; 6,734,172; 6,713,068; 5,795,577 and 6,770,445 and elsewhere, with teachings that can be adapted to the expression of polypeptide antigens as provided herein, for use in certain presently disclosed embodiments.
• compositions for altering i.e., increasing or decreasing in a statistically significant manner, for example, relative to an appropriate control as will be familiar to persons skilled in the art
• an immune response may be any active alteration of the immune status of a host, which may include any alteration in the structure or function of one or more tissues, organs, cells or molecules that participate in maintenance and/or regulation of host immune status.
• immune responses may be detected by any of a variety of well known parameters, including but not limited to in vivo or in vitro determination of: soluble immunoglobulins or antibodies; soluble mediators such as cytokines, lymphokines, chemokines, hormones, growth factors and the like as well as other soluble small peptide, carbohydrate, nucleotide and/or lipid mediators; cellular activation state changes as determined by altered functional or structural properties of cells of the immune system, for example cell proliferation, altered motility, induction of specialized activities such as specific gene expression or cytolytic behavior; cellular differentiation by cells of the immune system, including altered surface antigen expression profiles or the onset of apoptosis (programmed cell death); or any other criterion by which the presence of an immune response may be detected.
• soluble immunoglobulins or antibodies soluble mediators such as cytokines, lymphokines, chemokines, hormones, growth factors and the like as well as other soluble small peptide, carbohydrate, nu
• Immune responses may often be regarded, for instance, as discrimination between self and non-self structures by the cells and tissues of a host's immune system at the molecular and cellular levels, but the invention should not be so limited.
• immune responses may also include immune system state changes that result from immune recognition of self molecules, cells or tissues, as may accompany any number of normal conditions such as typical regulation of immune system components, or as may be present in pathological conditions such as the inappropriate autoimmune responses observed in autoimmune and degenerative diseases.
• immune responses may also include suppression, attenuation or any other down-regulation of detectable immunity, which may be the consequence of the antigen selected, the route of antigen administration, specific tolerance induction or other factors.
• Determination of the induction of an immune response by the vaccines of the present invention may be established by any of a number of well known immunological assays with which those having ordinary skill in the art will be readily familiar.
• assays include, but need not be limited to, to in vivo or in vitro determination of: soluble antibodies; soluble mediators such as cytokines, lymphokines, chemokines, hormones, growth factors and the like as well as other soluble small peptide, carbohydrate, nucleotide and/or lipid mediators; cellular activation state changes as determined by altered functional or structural properties of cells of the immune system, for example cell proliferation, altered motility, induction of specialized activities such as specific gene expression or cytolytic behavior; cellular differentiation by cells of the immune system, including altered surface antigen expression profiles or the onset of apoptosis (programmed cell death).
• T cell proliferation can be detected by measuring the rate of DNA synthesis, and antigen specificity can be determined by controlling the stimuli (such as, for example, a specific desired antigen- or a control antigen-pulsed antigen presenting cells) to which candidate antigen-reactive T cells are exposed.
• T cells which have been stimulated to proliferate exhibit an increased rate of DNA synthesis.
• a typical way to measure the rate of DNA synthesis is, for example, by pulse-labeling cultures of T cells with tritiated thymidine, a nucleoside precursor which is incorporated into newly synthesized DNA.
• the amount of tritiated thymidine incorporated can be determined using a liquid scintillation spectrophotometer.
• Other ways to detect T cell proliferation include measuring increases in interleukin-2 (IL-2) production, Ca 2+ flux, or dye uptake, such as 3- (4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium.
• IL-2 interleukin-2
• dye uptake such as 3- (4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium.
• lymphokines such as interferon-gamma
• the relative number of T cells that can respond to a particular antigen may be quantified.
• Detection of antigen-specific antibody production may be achieved, for example, by assaying a sample (e.g., an immunoglobulin containing sample such as serum, plasma or blood) from a host treated with a vaccine according to the present invention using in vitro methodologies such as radioimmunoassay (RIA), enzyme linked immunosorbent assays (ELISA), equilibrium dialysis or solid phase immunoblotting including Western blotting.
• a sample e.g., an immunoglobulin containing sample such as serum, plasma or blood
• ELISA enzyme linked immunosorbent assays
• equilibrium dialysis solid phase immunoblotting including Western blotting.
• solid phase immunoblotting including Western blotting.
• Elaboration of soluble mediators may also be readily determined by enzyme-linked immunosorbent assay (ELISA), for example, using methods, apparatus and reagents that are readily available from commercial sources (e.g., Sigma, St. Louis, MO; see also R & D Systems 2006 Catalog, R & D Systems, Minneapolis, MN).
• ELISA enzyme-linked immunosorbent assay
• any number of other immunological parameters may be monitored using routine assays that are well known in the art. These may include, for example, antibody dependent cell-mediated cytotoxicity (ADCC) assays, secondary in vitro antibody responses, flow immunocytofluohmethc analysis of various peripheral blood or lymphoid mononuclear cell subpopulations using well established marker antigen systems, immunohistochemistry or other relevant assays.
• ADCC antibody dependent cell-mediated cytotoxicity
• the vaccine and adjuvant compositions provided herein will be capable of eliciting or enhancing in a host at least one immune response that is selected from a T H 1 -type T lymphocyte response, a T H 2-type T lymphocyte response, a cytotoxic T lymphocyte (CTL) response, an antibody response, a cytokine response, a lymphokine response, a chemokine response, and an inflammatory response.
• TTL cytotoxic T lymphocyte
• the immune response may comprise at least one of production of one or a plurality of cytokines wherein the cytokine is selected from interferon-gamma (IFN- ⁇ ), tumor necrosis factor-alpha (TNF- ⁇ ), production of one or a plurality of interleukins wherein the interleukin is selected from IL-1 , IL-2, IL-3, IL-4, IL-6, IL-8, IL-10, IL-12, IL-13, IL-16, IL-18 and IL-23, production one or a plurality of chemokines wherein the chemokine is selected from MIP-1 ⁇ , MIP-1 ⁇ , RANTES, CCL4 and CCL5, and a lymphocyte response that is selected from a memory T cell response, a memory B cell response, an effector T cell response, a cytotoxic T cell response and an effector B cell response.
• IFN- ⁇ interferon-gamma
• TNF- ⁇ tumor necrosis factor-alpha
• compositions generally comprise at least one GLA compound of the invention, and may further comprise one or more components as provided herein that are selected, for example, from antigen, TLR agonist, co-adjuvant (including optionally a cytokine, an imidazoquinoline immune response modifier and/or a dSLIM), and/or a recombinant expression construct, in combination with a pharmaceutically acceptable carrier, excipient or diluent.
• antigen TLR agonist
• co-adjuvant including optionally a cytokine, an imidazoquinoline immune response modifier and/or a dSLIM
• a recombinant expression construct in combination with a pharmaceutically acceptable carrier, excipient or diluent.
• the present invention is drawn to GLA "monotherapy" wherein GLA, as described herein, is formulated in a composition that is substantially devoid of other antigens, and is administered to a subject in order to stimulate an immune e response, e.g., a non-specific immune response, for the purpose of treating or preventing a disease or other condition, such as for treating an infection by an organism, for treating seasonal rhinitis, or the like.
• an immune e response e.g., a non-specific immune response
• the compositions and methods of the invention employ a GLA compound for stimulating an immune response in a subject.
• the GLA is in the form of a spray, optionally provided in a kit.
• the GLA may be preferably formulated in a stable emulsion.
• a composition comprising a GLA compound of the invention in a stable emulsion substantially devoid of other antigens.
• the pharmaceutical composition is a vaccine composition that comprises both GLA and an antigen and may further comprise one or more components, as provided herein, that are selected from TLR agonist, co-adjuvant (including, e.g., a cytokine, an imidazoquinoline immune response modifier and/or a dSLIM) and the like and/or a recombinant expression construct, in combination with a pharmaceutically acceptable carrier, excipient or diluent.
• TLR agonist including, e.g., a cytokine, an imidazoquinoline immune response modifier and/or a dSLIM
• co-adjuvant including, e.g., a cytokine, an imidazoquinoline immune response modifier and/or a dSLIM
• a recombinant expression construct in combination with a pharmaceutically acceptable carrier, excipient or diluent.
• Illustrative carriers will be nontoxic to recipients at the dosages and concentrations employed.
• GLA-plus-nucleic acid-based vaccines or for vaccines comprising GLA plus an antigen, about 0.001 ⁇ g/kg to about 100 mg/kg body weight will generally be administered, typically by the intradermal, subcutaneous, intramuscular or intravenous route, or by other routes.
• the dosage is about 0.001 ⁇ g/kg to about 1 mg/kg. In another specific embodiment, the dosage is about 0.001 to about 50 ⁇ g/kg. In another specific embodiment, the dosage is about 0.001 to about 15 ⁇ g/kg.
• the amount of GLA administered is about 0.01 ⁇ g/dose to about 5 mg/dose. In another specific embodiment, the amount of GLA administered is about 0.1 ⁇ g/dose to about 1 mg/dose. In another specific embodiment, the amount of GLA administered is about 0.1 ⁇ g/dose to about 100 ⁇ g/dose. In another specific embodiment, the GLA administered is about 0.1 ⁇ g/dose to about 10 ⁇ g/dose. It will be evident to those skilled in the art that the number and frequency of administration will be dependent upon the response of the host. "Pharmaceutically acceptable carriers" for therapeutic use are well known in the pharmaceutical art, and are described, for example, in Remingtons Pharmaceutical Sciences, Mack Publishing Co. (A. R. Gennaro edit. 1985).
• sterile saline and phosphate-buffered saline at physiological pH may be used.
• Preservatives, stabilizers, dyes and even flavoring agents may be provided in the pharmaceutical composition.
• sodium benzoate, sorbic acid and esters of p-hydroxybenzoic acid may be added as preservatives. ]d_. at 1449.
• antioxidants and suspending agents may be used, k ⁇
• “Pharmaceutically acceptable salt” refers to salts of the compounds of the present invention derived from the combination of such compounds and an organic or inorganic acid (acid addition salts) or an organic or inorganic base (base addition salts).
• the compositions of the present invention may be used in either the free base or salt forms, with both forms being considered as being within the scope of the present invention.
• compositions may be in any form which allows for the composition to be administered to a patient.
• the composition may be in the form of a solid, liquid or gas (aerosol).
• routes of administration include, without limitation, oral, topical, parenteral ⁇ e.g., sublingually or buccally), sublingual, rectal, vaginal, and intranasal ⁇ e.g., as a spray).
• parenteral as used herein includes iontophoretic ⁇ e.g., U.S. 7,033,598; 7,018,345; 6,970,739), sonophoretic ⁇ e.g., U.S.
• a composition as described herein is administered intradermal ⁇ by a technique selected from iontophoresis, microcavitation, sonophoresis or microneedles.
• compositions that will be administered to a patient take the form of one or more dosage units, where for example, a tablet may be a single dosage unit, and a container of one or more compounds of the invention in aerosol form may hold a plurality of dosage units.
• an excipient and/or binder may be present.
• examples are sucrose, kaolin, glycerin, starch dextrins, sodium alginate, carboxymethylcellulose and ethyl cellulose.
• Coloring and/or flavoring agents may be present.
• a coating shell may be employed.
• the composition may be in the form of a liquid, e.g., an elixir, syrup, solution, emulsion or suspension.
• the liquid may be for oral administration or for delivery by injection, as two examples.
• preferred compositions contain one or more of a sweetening agent, preservatives, dye/colorant and flavor enhancer.
• a surfactant, preservative, wetting agent, dispersing agent, suspending agent, buffer, stabilizer and isotonic agent may be included.
• a liquid pharmaceutical composition as used herein, whether in the form of a solution, suspension or other like form, may include one or more of the following carriers or excipients: sterile diluents such as water for injection, saline solution, preferably physiological saline, Ringer's solution, isotonic sodium chloride, fixed oils such as squalene, squalane, mineral oil, a mannide monooleate, cholesterol, and/or synthetic mono or digylcerides which may serve as the solvent or suspending medium, polyethylene glycols, glycerin, propylene glycol or other solvents; antibacterial agents such as benzyl alcohol or methyl paraben; antioxidants such as ascorbic acid or sodium bisulfite; chelating agents such as ethylenediaminetetraacetic acid; buffers such as acetates, citrates or phosphates and agents for the adjustment of tonicity such as sodium chloride or dextrose.
• the parenteral preparation can be enclosed in
• a pharmaceutical or vaccine composition of the invention comprises a stable aqueous suspension of less than 0.2um and further comprises at least one component selected from the group consisting of phospholipids, fatty acids, surfactants, detergents, saponins, fluorodated lipids, and the like.
• composition of the invention is formulated in a manner which can be aerosolized.
• a vaccine or pharmaceutical composition such as delivery vehicles including but not limited to aluminum salts, water-in-oil emulsions, biodegradable oil vehicles, oil- in-water emulsions, biodegradable microcapsules, and liposomes.
• delivery vehicles including but not limited to aluminum salts, water-in-oil emulsions, biodegradable oil vehicles, oil- in-water emulsions, biodegradable microcapsules, and liposomes.
• additional immunostimulatory substances for use in such vehicles are also described above and may include N-acetylmuramyl-L-alanine- D-isoglutamine (MDP), glucan, IL-12, GM-CSF, gamma interferon and IL-12.
• the carrier preferably comprises water, saline, alcohol, a fat, a wax or a buffer.
• the carrier preferably comprises water, saline, alcohol, a fat, a wax or a buffer.
• any of the above carriers or a solid carrier such as mannitol, lactose, starch, magnesium stearate, sodium saccharine, talcum, cellulose, glucose, sucrose, and magnesium carbonate, may be employed.
• Biodegradable microspheres e.g., polylactic galactide
• suitable biodegradable microspheres are disclosed, for example, in U.S. Patent Nos. 4,897,268 and 5,075,109. In this regard, it is preferable that the microsphere be larger than approximately 25 microns.
• compositions may also contain diluents such as buffers, antioxidants such as ascorbic acid, low molecular weight (less than about 10 residues) polypeptides, proteins, amino acids, carbohydrates including glucose, sucrose or dextrins, chelating agents such as EDTA, glutathione and other stabilizers and excipients.
• diluents such as buffers, antioxidants such as ascorbic acid, low molecular weight (less than about 10 residues) polypeptides, proteins, amino acids, carbohydrates including glucose, sucrose or dextrins, chelating agents such as EDTA, glutathione and other stabilizers and excipients.
• Neutral buffered saline or saline mixed with nonspecific serum albumin are exemplary appropriate diluents.
• product may be formulated as a lyophilizate using appropriate excipient solutions ⁇ e.g., sucrose) as diluents.
• compositions capable of delivering nucleic acid molecules encoding desired antigens.
• compositions include recombinant viral vectors (e.g., retroviruses (see WO 90/07936, WO 91/02805, WO 93/25234, WO 93/25698, and WO 94/03622), adenovirus (see Berkner, Biotechniques 6:616-627, 1988; Li et al., Hum. Gene Ther. 4:403-409, 1993; Vincent et al., Nat. Genet. 5:130- 134, 1993; and KoIIs et al., Proc. Natl. Acad. Sci.
• retroviruses see WO 90/07936, WO 91/02805, WO 93/25234, WO 93/25698, and WO 94/03622
• adenovirus see Berkner, Biotechniques 6:616-627, 1988; Li et al.,
• the DNA may be linked to killed or inactivated adenovirus (see Curiel et al., Hum. Gene Ther. 3:147-154, 1992; Cotton et al., Proc. Natl. Acad. Sci.
• compositions include DNA-ligand (see Wu et al., J. Biol. Chem. 264:16985- 16987, 1989) and lipid-DNA combinations (see Feigner et al., Proc. Natl. Acad. Sci. USA 84:7413-7417, 1989).
• ex vivo procedures may be used in which cells are removed from a host, modified, and placed into the same or another host animal. It will be evident that one can utilize any of the compositions noted above for introduction of antigen-encoding nucleic acid molecules into tissue cells in an ex vivo context. Protocols for viral, physical and chemical methods of uptake are well known in the art.
• the present invention is useful for enhancing or eliciting, in a host, a patient or in cell culture, an immune response.
• the term "patient” refers to any warm-blooded animal, preferably a human.
• a patient may be afflicted with an infectious disease, cancer, such as breast cancer, or an autoimmune disease, or may be normal (i.e., free of detectable disease and/or infection).
• a "cell culture” is any preparation containing immunocompetent cells or isolated cells of the immune system (including, but not limited to, T cells, macrophages, monocytes, B cells and dendritic cells).
• Such cells may be isolated by any of a variety of techniques well known to those of ordinary skill in the art (e.g., Ficoll-hypaque density centrifugation).
• the cells may (but need not) have been isolated from a patient afflicted with cancer, and may be reintroduced into a patient after treatment.
• a liquid composition intended for either parenteral or oral administration should contain an amount of GLA vaccine composition such that a suitable dosage will be obtained. Typically, this amount is at least 0.01 wt% of an antigen in the composition. When intended for oral administration, this amount may be varied to be between 0.1 and about 70% of the weight of the composition. Preferred oral compositions contain between about 4% and about 50% of the antigen. Preferred compositions and preparations are prepared so that a parenteral dosage unit contains between 0.01 to 1 % by weight of active composition.
• the pharmaceutical composition may be intended for topical administration, in which case the carrier may suitably comprise a solution, emulsion, ointment or gel base.
• the base for example, may comprise one or more of the following: petrolatum, lanolin, polyethylene glycols, beeswax, mineral oil, diluents such as water and alcohol, and emulsifiers and stabilizers.
• Thickening agents may be present in a pharmaceutical composition for topical administration.
• the composition may include a transdermal patch or iontophoresis device.
• Topical formulations may contain a concentration of the antigen ⁇ e.g., GLA-antigen vaccine composition) or GLA ⁇ e.g., immunological adjuvant composition; GLA is available from Avanti Polar Lipids, Inc., Alabaster, AL; e.g., product number 699800) of from about 0.1 to about 10% w/v (weight per unit volume).
• GLA is available from Avanti Polar Lipids, Inc., Alabaster, AL; e.g., product number 699800
• the composition may be intended for rectal administration, in the form, e.g., of a suppository which will melt in the rectum and release the drug.
• the composition for rectal administration may contain an oleaginous base as a suitable nonirritating excipient.
• bases include, without limitation, lanolin, cocoa butter and polyethylene glycol.
• the vaccine compositions/ adjuvants may be administered through use of insert(s), bead(s), timed-release formulation(s), patch(es) or fast-release formulation(s).
• kits comprising the herein described GLA vaccine compositions and/or GLA immunological adjuvant compositions, which may be provided in one or more containers.
• all components of the GLA vaccine compositions and/or GLA immunological adjuvant compositions are present together in a single container, but the invention embodiments are not intended to be so limited and also contemplate two or more containers in which, for example, a GLA immunological adjuvant composition is separate from, and not in contact with, the antigen component.
• administering may be performed beneficially, whilst in other cases such administration may beneficially be separated temporally and/or spatially ⁇ e.g., at a different anatomical site) from administration of the antigen, whilst in still other cases administration to the subject is beneficially conducted of a GLA vaccine composition as described herein and containing both antigen and GLA, and optionally other herein described components as well.
• a container according to such kit embodiments may be any suitable container, vessel, vial, ampule, tube, cup, box, bottle, flask, jar, dish, well of a single-well or multi-well apparatus, reservoir, tank, or the like, or other device in which the herein disclosed compositions may be placed, stored and/or transported, and accessed to remove the contents.
• a container may be made of a material that is compatible with the intended use and from which recovery of the contained contents can be readily achieved.
• Preferred examples of such containers include glass and/or plastic sealed or re-sealable tubes and ampules, including those having a rubber septum or other sealing means that is compatible with withdrawal of the contents using a needle and syringe.
• Such containers may, for instance, by made of glass or a chemically compatible plastic or resin, which may be made of, or may be coated with, a material that permits efficient recovery of material from the container and/or protects the material from, e.g., degradative conditions such as ultraviolet light or temperature extremes, or from the introduction of unwanted contaminants including microbial contaminants.
• the containers are preferably sterile or stehlizable, and made of materials that will be compatible with any carrier, excipient, solvent, vehicle or the like, such as may be used to suspend or dissolve the herein described vaccine compositions and/or immunological adjuvant compositions and/or antigens and/or recombinant expression constructs, etc.
• Emulsion systems may also be used in formulating compositions of the present invention.
• many single or multiphase emulsion systems have been described.
• Oil in water emulsion adjuvants per se have been suggested to be useful as adjuvant composition (EP 0 399 843B), also combinations of oil in water emulsions and other active agents have been described as adjuvants for vaccines (WO 95/17210; WO 98/56414; WO 99/12565; WO 99/11241 ).
• Other oil emulsion adjuvants have been described, such as water in oil emulsions (U.S. Pat. No. 5,422,109; EP O 480 982 B2) and water in oil in water emulsions (U.S. Pat. No.
• a composition of the invention comprises an emulsion of oil in water wherein the GLA is incorporated in the oil phase.
• a composition of the invention comprises an emulsion of oil in water wherein the GLA is incorporated in the oil phase and wherein an additional component is present, such as a co-adjuvant, TLR agonist, or the like, as described herein.
• the oil phase of the emulsion system preferably comprises a metabolizable oil.
• metabolizable oil is well known in the art. Metabolizable can be defined as "being capable of being transformed by metabolism” (Dorland's illustrated Medical Dictionary, W. B. Saunders Company, 25th edition (1974)).
• the oil may be any vegetable oil, fish oil, animal oil or synthetic oil, which is not toxic to the recipient and is capable of being transformed by metabolism. Nuts (such as peanut oil), seeds, and grains are common sources of vegetable oils. Synthetic oils are also part of this invention and can include commercially available oils such as NEOBEE® and others.
• Squalene (2,6,10,15,19,23-Hexamethyl-2,6,10,14,18,22- tetracosahexaene), for example, is an unsaturated oil which is found in large quantities in shark-liver oil, and in lower quantities in olive oil, wheat germ nil, rice bran oil, and yeast, and is a particularly preferred oil for use in this invention.
• Squalene is a metabolizable oil virtue of the fact that it is an intermediate in the biosynthesis of cholesterol (Merck index, 10th Edition, entry no.8619).
• Particularly preferred oil emulsions are oil in water emulsions, and in particular squalene in water emulsions.
• the most preferred oil emulsion adjuvants of the present invention comprise an antioxidant, which is preferably the oil .alpha.-tocopherol (vitamin E, EP 0 382 271 B1 ).
• an antioxidant which is preferably the oil .alpha.-tocopherol (vitamin E, EP 0 382 271 B1 ).
• WO 95/17210 and WO 99/11241 disclose emulsion adjuvants based on squalene, alpha-tocopherol, and TWEEN® 80, optionally formulated with the immunostimulants QS21 and/or 3D-MPL (which are discussed above).
• WO 95/17210 and WO 99/11241 disclose emulsion adjuvants based on squalene, alpha-tocopherol, and TWEEN® 80, optionally formulated with the immunostimulants QS21 and/or 3D-MPL (which are discussed above).
• 99/12565 discloses an improvement to these squalene emulsions with the addition of a sterol into the oil phase.
• a triglyceride such as tricaprylin (C27H5OO6), may be added to the oil phase in order to stabilize the emulsion (WO 98/56414).
• the size of the oil droplets found within the stable oil in water emulsion are preferably less than 1 micron, may be in the range of substantially 30-600 nm, preferably substantially around 30-500 nm in diameter, and most preferably substantially 150-500 nm in diameter, and in particular about 150 nm in diameter as measured by photon correlation spectroscopy.
• the oil droplets by number should be within the preferred ranges, more preferably more than 90% and most preferably more than 95% of the oil droplets by number are within the defined size ranges
• the amounts of the components present in the oil emulsions of the present invention are conventionally in the range of from 2 to 10% oil, such as squalene; and when present, from 2 to 10% alpha tocopherol; and from 0.3 to 3% surfactant, such as polyoxyethylene sorbitan monooleate.
• the ratio of oil: alpha tocopherol is equal or less than 1 as this provides a more stable emulsion.
• Span 85 may also be present at a level of about 1 %. In some cases it may be advantageous that the vaccines of the present invention will further contain a stabilizer.
• the method comprises the mixing the oil phase with a surfactant such as a PBS/TWEEN80® solution, followed by homogenization using a homogenizer.
• a surfactant such as a PBS/TWEEN80® solution
• a homogenizer for instance, a method that comprises passing the mixture once, twice or more times through a syringe needle would be suitable for homogenizing small volumes of liquid.
• the emulsification process in a microfluidizer M110S microfluidics machine, maximum of 50 passes, for a period of 2 minutes at maximum pressure input of 6 bar (output pressure of about 850 bar)
• This adaptation could be achieved by routine experimentation comprising the measurement of the resultant emulsion until a preparation was achieved with oil droplets of the required diameter.
• the following Examples are offered by way of illustration and nottation.
• Glucose amine 1 (2.04 g, 9.45 mmol), sodium hydrogencarbonate (3.21 g, 38.22 mmol), and copper(ll) sulfate pentahydrate (90.5 mg, 0.362 mmol) were dissolved in water (12.3 mL).
• the triflic azide stock solution prepared above (21 mL) was added, followed by the addition of methanol (81 mL) to yield a homogeneous system.
• the blue mixture was stirred vigorously at room temperature. Complete consumption of the amine was monitored by TLC (ninhydrin stain) and is also indicated by a color change of the mixture from blue to green.
• the solvents were removed in vacuo with a rotary evaporator keeping the temperature strictly below 25 0 C.
• Acetic acid (0.30 mL, 5.2 mmol) was added dropwise to a stirred suspension of 7 (700 mg, 1.04 mmol) and zinc powder (676 mg, 10.4 mmol) in DCM (15 mL).
• the reaction mixture was stirred at room temperature for 4 h, after which it was diluted with ethyl acetate (50 mL).
• the solids were removed by filtration and washed with ethyl acetate (2 x 10 mL).
• the combined filtrates were washed with saturated aqueous NaHCO3 (2 x 40 mL) and brine (2 x 40 mL).
• ⁇ /V-Dicyclohexylcarbodiimide (230 mg, 1.11 mmol) was added to a stirred solution of (RJ-S-dodecanoyl-tetradecanoic acid (see preparation below, compound 40) (381 mg, 0.81 mmol) in DCM (10 ml_). After the reaction mixture was stirred for 10 min, the free amine (648 mg, 0.699 mmol) in DCM (10 ml_) was added, and stirring was continued for another 12 h. The insoluble materials were removed by filtration, and the residue was washed with DCM (2 ⁇ 2 ml_).
• Tetrakis(triphenylphosphine)palladiunn (228 mg, 0.198 mmol) was added to a solution of 17 (1.66 g, 0.980 mmol), D-BuNH 2 (0.19 ml_, 1.97 mmol), and HCOOH (74.5 ⁇ l_, 1.98 mmol) in THF (20 ml_). After the reaction mixture was stirred at room temperature for 20 min, it was diluted with DCM (40 ml_), and washed successively with water (40 ml_), saturated aqueous NaHCO3 (2 x 40 ml_), and brine (40 ml_). The organic phase was dried (MgSO 4 ) and filtered.
• EXAMPLE 18 TERT-BUTYLDIMETHYLSILYL-6-O- ⁇ 6-O-BENZYL-2-DEOXY-4-O-(1 ,5- DIHYDRO-3-OXO-3 ⁇ . 5 -3H-2,4,3-BENZODIOXAPHOSPHEPIN-3YL)-2-r(R)-3-
• Compound 15 (1.23 g, 1.07 mmol) was acylated in a manner similar to the synthesis of compound 16 (Example 14) using (DCC, 430 mg, 2.08 mmol), required lipid (Compound 40, Example 36, 630 mg, 1.59 mmol), and triethylamine (161 mg, 1.59 mmol) to provide 20 (1.05 g, 81 %) as a colorless oil.
• Compound 20 (1.43 g, 1.18 mmol) was acylated in a manner similar to the synthesis of compound 17 (Example 15) using (DCC, 453 mg, 2.20 mmol), required lipid (477 mg, 1.43 mmol), and ⁇ /, ⁇ /-dimethyl-4- aminopyridine (67 mg, 0.548 mmol) to provide 21 (1.60 g, 83%) as a colorless oil.
• Compound 22 (1.25 g, 0.811 mmol) was acylated in a manner similar to the synthesis of compound 19 (Example 17) using (DCC, 335 mg, 1.62 mmol), required lipid (Compound 34, Example 32, 386 mg, 1.06 mmol), and ⁇ /, ⁇ /-dimethyl-4-aminopyridine (50 mg, 0.41 mmol) to provide 23 (440 mg, 29%) as a colorless oil.
• Ester 31 (1.3 g, 3.73 mmol) was dissolved in THF/MeOH/CH 3 CN mixture (v/v/v, 1/1/1 , 90 mL). Lithium hydroxide monohydrate (235 mg, 5.6 mmol) as a solution in water (30 mL) was added, and the mixture stirred overnight. The solvent amount was reduced in vacuo to about 30 ml_. To the remaining aqueous solution was added 1 M hydrochloric acid to bring the pH down to 3. The aqueous layer was extracted with diethyl ether (3 * 40 ml_). The combined organic extracts were dried over sodium sulfate. The drying agent was removed by filtration, and the solvents removed using a rotary evaporator.
• Ester 32 (4.01 g, 10.4 mmol) was dissolved in THF/MeOH/CH 3 CN mixture (v/v/v, 1/1/1 , 90 ml_). Lithium hydroxide monohydrate (874 mg, 20.8 mmol) as a solution in water (30 mL) was added, and the mixture stirred overnight. The solvent amount was reduced in vacuo to about 30 mL. To the remaining aqueous solution was added hydrochloric acid (1 M) to bring the pH down to 3. The aqueous layer was extracted with diethyl ether (3 * 40 mL). The combined organic extracts were dried over sodium sulfate. The drying agent was removed by filtration and the solvents removed using a rotary evaporator.
• Ester 39 (10.15 g, 20.77 mmol) was dissolved in acetic acid (100 ml_). Zinc (15.5 g, 237 mmol) was added, and the mixture heated to reflux for 4 h. The acetic acid was removed under vacuum and the residue azeotroped with toluene to dryness. The residue was purified by chromatography on silica gel (120 g RediSep column, eluting with a gradient of 0% through 60% ethyl acetate/hexanes over 50 min, 85 mL/min) to give the product 40 (7.2 g, 89%) as a colorless liquid.
• the reactor was then charged with a final portion of H 2 (60 psi) stirred (600 rpm) and heated to 50 0 C for 20 h. The reactor was then cooled to room temperature and the mixture concentrated in vacuo. The resulting residue was purified by silica gel chromatography, eluting with a gradient of 0% through 50% ethyl acetate/hexanes to provide 42 (3.97 g, 74%) as an off-white solid.
• Lithium hydroxide monohydrate (1.98 g, 47.2 mmol) was added to a solution of (R)-methyl 3-hydroxytetradecanoate (42, 8.17 g, 31.5 mmol) in THF (66 mL) and water (66 mL) and stirred at room temperature for 2 h. The mixture was then diluted with diethyl ether (1 L) and the pH adjusted to ⁇ 3 with a solution of hydrochloric acid (1 N). The solution was then extracted with diethyl ether (200 mL), and the organic fractions were combined and dried over Na 2 SO 4 .
• Zinc dust (24.42 g, 373.3 mmol) was added to a solution of 46 (16.28 g, 28.42 mmol) in acetic acid (150 ml_). The mixture was then heated to reflux (115 0 C) for 3 h. The mixture was then concentrated in vacuo, and the residual pyridine removed by dissolving the residue in toluene (100 ml_) and concentrating in vacuo.
• Compound IX was used in a vaccine containing a Mycobacterium tuberculosis antigenic polypeptide referred to as ID83. Standard immunological methodologies and reagents were employed (Current Protocols in Immunology, Coligan et al. (Eds.) 2006 John Wiley & Sons, NY).
• mice (four C57BL/6 animals per group) were immunized three times at three-week intervals with ID83 antigen (8 ⁇ g per animal for each immunization) in water, ID83 antigen (8 ⁇ g per animal for each immunization) formulated in a stable emulsion vehicle, or ID83 antigen (8 ⁇ g per animal for each immunization) formulated in a stable emulsion containing (i) GLA-SE (10 ⁇ g per animal for each immunization), or (ii) Compound IX (10 ⁇ g per animal for each immunization).
• mice were bled to evaluate antigen-specific antibody (IgGI and lgG2c) responses.
• IgGI and lgG2c antigen-specific antibody
• mice were sacrificed and spleens collected to analyze T cell- dependent IFN- ⁇ cytokine responses to in vitro antigen stimulation by ELISPOT according to published methods (Id.).
• IFN- ⁇ cytokine responses have been associated with a TH1 protective phenotype against M. tuberculosis infection.
• Figure 1 shows ELISPOT data of anti-ID83 IFN- ⁇ cytokine production induced in mice three weeks after the third immunization using ID83 antigen and ID83 component antigens (Rv2608, Rv1813 and Rv3620) formulated with a stable emulsion (SE) of 10 ⁇ g Compound IX, compared to ID83 formulated in GLA-SE, SE or water. Means and SEM of IFN- ⁇ secreting cells per million of splenocytes in each group are shown.
• GLA-SE refers to a stable emulsion of a compound as described in co-owned U.S. Patent Publication No. 20080131466, wherein R 1 , R 3 , R 5 and R 6 are Cn linear alkyl; and R 2 and R 4 are Ci 3 linear alkyl.
• ID83 + Compound IX vaccination induced robust ID83 antigen- specific cytokine responses, while little or no such responses were observed in the ID83 + water or ID83 + SE control groups.
• Similar levels of IFN- ⁇ secreting cells were elicited in splenocytes purified from mice immunized with ID83 + Compound IX or ID83 + GLA-SE upon restimulation with the ID83 component antigens, Rv2608, Rv1813 and Rv3620.
• Compound IX in a stable oil formulation with M. tuberculosis vaccine antigen candidate ID83 induced predominantly antigen- specific immune responses of the cellular type (T cell) associated with the protective TH 1 phenotype.
• mice (four C57BL/6 animals per group) were immunized three times at three-week intervals with the ID83 antigen (8 ⁇ g per animal for each immunization) used alone or formulated in a stable emulsion containing Compound IX (10 ⁇ g per animal for each immunization).
• Sera were collected by bleeding animals one week after each immunization, and serum levels of IgGI and lgG2c antibodies specific for ID83 were examined by ELISA according to published methods (Id.)
• Predominance of either IgGI or lgG2c antibody isotype is associated with TH2 or TH1 responses, respectively. It has been demonstrated that a TH1 response is necessary for protection against Mycobacterium tuberculosis infection.
• ID83 in water induced predominantly antigen-specific IgGI antibody.
• ID83 + SE, ID83 + Compound IX-SE or ID83 + GLA-SE vaccination induced higher lgG2c antibody titers, and converted the phenotype to a mixed lgG1 :lgG2c antigen-specific antibody response.
• This example demonstrates the immunostimulatory activity of Compound IX in human cells.
• Compound IX was tested in vitro using HEK 293 cells (InvivoGen) with expression vectors encoding 1 ) TLR4, MD-2, and CD14, or 2) TLR2 and TLR6 to define compound activity and dependence on TLR4, and to exclude activation of TLR2.
• HEK 293 cell lines were further stably transfected with the NF-kB reporter vector pNifty-2 such that alkaline phosphatase is secreted into the growth media upon activation of the TLR signaling pathway.
• Transfected cell lines were plated at 5x10 4 cells per well in a 96-well plates and stimulated for 16-24 hours cultured in medium containing serial dilutions of Compound IX and other adjuvants.
• Secreted alkaline phosphatase activity was measured in the culture media using QUANTIBIue® assay (InvivoGen). The data was measured as enhancement of NF-kB above the PBS negative control.
• Compound IX showed greater than two-fold enhancement of NF-kB at concentrations as low as 0.1 ⁇ g/ml ( Figure 3). The results of these experiments demonstrated clear TLR4 agonist activity for Compound IX that did not appear to be associated with induction of TLR2.
• Compound IX was designed based on structural considerations of the reported atomic structure of MD2 and TLR4. As such, the fact that it binds and elicits a profile that is similar to that of a commercially approved TLR4 agonist (MPL®) is a surprising and unexpected result. More specifically, the profile for Compound IX advantageously plateaus rapidly as concentrations are increased, before one would expect the cytokine levels to rise to a point where negative side effects may exert themselves. Thus, it is expected that Compound IX and other illustrative compounds of the invention can be safely administered over a broad range of concentrations, which is highly desirable in the context of reproducibility of clinical outcomes among patients and for the safety in ranging a dose for adults and children. In this respect, the lower cytokine activity for Compound IX is a surprising and desirable result that will further facilitate its safe use in clinical formulations.
• human whole blood cells were stimulated with Compound IX and ELISA assays were performed to detect the induction of immunostimulatory cytokines.
• Serial dilutions (1 :5) of Compound IX and other adjuvants were performed with phosphate buffered saline in a 96 well plate for a total of 7 dilutions.
• 100 ⁇ l of fresh Iy drawn human blood from two different donors were mixed and incubated with 100 ⁇ l of adjuvant dilutions.

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