[CANCER RESEARCH (SUPPL.)45, 4689s-4690s, September1985]

Unconventional : Immunization with Antildiotype against Viral Diseases'

H. Koprowski

TheWistarinstitute,Philadelphia,Pennsylvania19104

Theconceptofantiidiotypevaccinesrelatestothegeneration forproductionofAb@inrabbitsdidnotneutralizethevirusbut of immuneresponseto an (virus,bacteria,parasites)by did bind to viral glycoproteins.The Ab@elicitedin mice after immunizationofthehostwithan immunoglobulinthatdefinesa immunizationwiththe Ab@antibodynotonlyboundto viral specificregionon the anti-pathogenantibodymoleculeand in glycoproteinbutalsoneutralizedthevirus(7). In the nonviral turn engendersan antibodythat mimicsin its functionsuch an antigenfieldAb@elicitedbyimmunizationwitha-Id monoclonal anti-pathogenantibody.Thetheoreticalbasisfor thisconcept antibodyagainstanti-fructosanantibodydifferin their reactivity canbe foundinthe immunenetworktheoryfirstproposedby patternsto anti-fructosanantibodiesproducedafter immuniza Jerne(1)inwhichtheinterplayofantigen-bindingsitesonanti tionwithbacteriallevan(10). bodymoleculesandhostimmunocytesleadsto theexistenceof severaltypes of antibodiesdevelopedsequentiallyinthe same Advantagesofa-Id ViralVaccines individualimmunizedagainsta givenantigen(see “Glossary―). The aim of immunizationwithanti-idiotypeantibodyis to The existenceofa-Id antibodiesdirectedto cross-reactive producean antibody(Ab3)reactingwith the antigenin such a idiotypessharedby anti-viralantibodiesofdifferentfinespecific waythatit willprotectthehostfromthedisease.Thishasbeen itiesmaymakeit moredifficultfora virusto escapeimmune achievedin severalviralinfections.As shownin Table1 immu surveillance by antigenic variation. A virus may evade immune nizationof micewith a-Id2led to the developmentofvirus defensesifitexistsinnatureinmanyantigenicvariantformsas reactiveantibodiesinseveralviralsystems.Inthecaseof reo maybethecaseinthehumanT-cellleukemiavirusfamilyorifit virus(2)andSendai(3)it wasalsopossibletogeneratevirus acquires antigenic changes in the course of infection within the specificcytotoxicT-ceIIsafterimmunizationofmicewith mono sameindividualhost; the latter is particularlyimportantin the clonala-Idantibodies.Inthecaseof hepatitisBvirus,theAb@ caseof twootherretroviruses,visna(11)andequineinfectious engenderedbyimmunizationwitha-Id boundto a peptide(4) anemia(12). that may represent part of an a determinantwhich induces Theotherobviousadvantageina-Idvaccinesistheabsence commonId(5). of the viralantigen.Thiscircumventstheoftentortuousand Mice immunizedwith a-Id to Sendai monoclonalantibody sometimesunpredictablesearchfortracesoflivenoninactivated resistedchallengewiththehomologousvirus(3).Withrabies(6) virusina productthatisultimatelyusedforhumanconsumption. andpolioviruses(7)thelevelofneutralizingAb@wasapparently Forinstanceinthecaseofhighlyinfectiousandhighlycontagious too low to protectagainstchallengebuta boosterinjectionwith Venezuelanequineencephalomyelitisvirustheproductionofviral a nonimmunizingdoseof (toolowfor immunizationof vaccinesthat were completelyinnocuousfor intracerebrallyin naivemice)enabledthesemiceto resistviralchallenge(6).In jectedguineapigsendedincausingdiseaseinhumansimmu thecaseofhepatitisBvirusoneinjectionofa-Iddidnotengender nizedwithsucha vaccine(13—15).Contrastthiswiththe a-Id hepatitisB-specificantibodybutmultipleinjectionsora booster vaccineinwhichviralantigenis in no way involved(16). inoculationwitheither122—137peptideorinactivatedhepatitis Furtheradvantagesofa-Id vaccinesmaybe theirabilityto B virusresultedin an immuneresponse(8). induceimmuneresponsesinhostswhoareincapableofrespond In generala-Id antibodiesthatengenderedantigen-reactiveing directlyto an antigen.For exampleinfantswho do not Ab3werecross-reactiveforidiotopescommontomanyantibody respondwelltovaccinationwithStreptococcuspneumoniaemay preparationsgeneratedindifferentanimalspecies. beableto developimmunitybyimmunizationwitha-Id.Animal The dosageof a-Id seemsto be of importanceinorderto studieshaveshownthattreatmentatbirthwithmonoclonala-Id produceantigen-reactiveAbe.Rabies-reactingAb@wasinduced antibodiesto levan-bindingproteinsfollowedby a boosterinoc afterimmunizationofmicewith2.5 or 1.25 @gofa-Idforoneof ulationwiththe samea-Id antibodygeneratesalevan-specific the threeimmunizinginjectionsbutnot with dosesequalor antibodyresponse(10). greaterthan5 or lessthan1.25 jzg(9).Polio-reactiveAb@was elicitedonlyafterimmunizationofmicewitheither5or0.5 @gof a-Id(7). a-Id forAIDS FunctionsandspecificitiesoftheAb@elicitedbyimmunization Inthecaseof AIDScompleteinactivationoflivinghumanT witha-Id antibodiescannotalwaysbe predictedasshownby cellleukemiavirusIllmaypresentaformidableproblemifwhole theresultsobtainedinmiceimmunizedwithpolyclonalrabbita- virusvaccineswerethe immediategoal.Vaccinesbasedon Id antibodyOneof theanti-rabiesmonoclonalantibodiesused noninfectiousviral components may be in the offing. At the same

1 Presented at the HTLV Symposium, December 6 and 7, 1984, Bethesda, MD. timeproductionofa-Id antibodiesbyimmunizationofanimals This work was supported in part by research grant Al-09706 from the National with purifiedidiotypesobtainedfrom a groupof healthyindivid Institute of Allergy and Infectious Diseases. 2 The abbreviations used are: Id, idiotype; AIDS, acquired immunodeficiency ualswho were exposedto AIDS may be anotheravenueto syndrome. follow.Whenthe a-Idsare produceditis hopedthattheywill

CANCERRESEARCHVOL.45 SEPTEMBER1985 4689s

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Table1 Immunityofmiceagainstvirusesfollowingimmunizationwithanti-idantibodies Anti-Id anti bodies pro a-IdTobacco Wus duced in ClassCross-reactivityImmunity of miceimmunizedwith mosaic Rabbit interspecies antibodyRabiesPolyclonalSpecificReoPolyclonal Mouse MonoclonalCross-reactiveCross-reactiveinterspeciesNeutralizing CytotoxicT-cel@'neutralizing antibodyHepatitis Aabbit for monoclonalantibody idi otypesNeutralizing PeptideSandalMouseMonoclona?'Non-H-2BRabbitPolyclonalCross-reactive interspeciesBinding to HepatitisBantigenandto challengeVenezuelan restricted122-137 Cytotoxic T cells; resistanceto antibodytiePolioequine encephalomyeli RabbitPolyclonalCross-reactive interspeciesNeutralizing IIMouseMonoclonalCross-reactiveNeutralizing antibody

a @c@teasily generated when hybridoma cells are used for @nmunization. b@@ted by immunization with T-cell receptor specific for Sandal virus. cross-reactwith Id sharedby antibodypreparationsfrommany 1.Syngeneicmonoclonalanti-ldiotypeantibodyidentffiesacellsurfacereceptor for reovirus.J.Immunol.,131:2533—2538,1983. differentindividuals.Thedosagefor effectivevaccinationwitha- 3. ErtI,H.C.,andF@mberg,A.W.SandalvirusspecificTcellclones:inductionof Idswouldhavetobecarefullyinvestigated.Whatremainsunpre cytolyticT cellsby an anti-Idiotypicantibodydirectedagainsta helperTcell done.Proc.Nati.Aced.Sci.USA,81:2850—2854,1984. dictableatpresentisnotonlythespecificitybutalsothefunctions 4. Kennedy,A. C., Dreesman,G. A., Sparrow,J. T., Cuiwell,A. R., Sanchez,V., of Abe,i.e.•whetherthey will ultimatelybeableto stopthe lonescu-Matiu,I.,Holhnger,F.B.,Melnick,J.L Inhibitionofacommonhuman infection. anti-hepatitisBsurfaceantigenidiotypebya cyclicsyntheticpeptide.J.Wol., 46: 653-655, 1983. Whateverthe answer may be efforts to proceedare worth 5. Kennedy,A. C., Sanchez,V., tonescu-Matiu,I.,Melnick,J. L, andDreesman, while,particularlysincetoolsto studythis problemarenow G.A.Acommonhumananti-hepatitisBsurfaceantigenidsOtypeisassociated withthegroupaconformation-dependentantigenicdeterminant.Virology,122: availableandnotimeshouldbelostinstartingtheseinvestiga 219—221,1982. tions. 6. Reagan,K.J.,wunner,w.H.,Wiktor,T.,andKoprowski,H.Anti.idiotypic antibodiesinduceneutralizingantibodiestorabiesvirusglycoproteins.J.Virol., 48: 980-666, 1983. Glossary 7. UydeHaag,F. G. C. M., and Osterhaus,A. D. M. E. Inductionofneutralizing antibodyinmiceagainstpoliovirustypeII withmonoclonalanti-idiotypic Inordertociarifytheterminologyusedinthispublicationthefollowingglossary body. J. Immunol, 134: 1225—1229,1985. is offeredtothereader. 8. Kennedy,A.C.,Sparrow.J.T.,Sanchez,V.,Melnick,J.L, andDreesman, G. A. EnhancementofviralhepatitisBantibody(antl-HBs)responsetoa : antigenic determinant of moleculesother than @nmunogIobulins. synthetic cyclic peptide by priming with anti-idiotype antibodies. Virology, 136: Idiotope: an antigenic determinant formed by the variable regions of the heavy 247—252,1984. and/or light chains of an antibody molecule. An idlotope that mimics an epltope of 9. Koprowsld,H.,Wsktor,T.J.,Reagan,K.,Mactartan,A.,andDietzschold,B.A a foreign protein is referred to as internal image. newgenerationofrabiesvaccines:rabiesglycoproteingenerecombinants, Abs:antibodies that would be induced by and react with present on an anti-dotypicantibodiesandsyntheticpeptides.In: ModemApproachesto antigen used for vaccination. Vaccines:MolecularandOnemicalBasisofAeSiStancetoWal, Bacterial,and Abe: antibodies generated in response to and reacting with idiotopes of Ab@. Parasitic Diseases. Proceedingsof meeting in September 1984. Cold Spring This set of antibodies is further subdivided into: Harbor, NY: Cold Spring Harbor Laboratory, in press, 1985. Ab@:antibodies binding to framework-associated idiotopes. 10. RUbinStein,L J., Goldberg,B., Inemaux,J., Stein, K. E., and Bone, C. A. Ab,@:antibodiesbinding to combining-site associated idiotopes. If capable of [email protected] requirementforImmunizationwith inducing antibodies (Abs)that exhibit the same or similar specificity as Ab,. Aba,,IS antigenormonoclonalanti.idiotypicantibodiesfortheactivationof$2—ø6and said to contain an internal image of the antigen. 112—ilpolyfructosanreactiveclonesin BALB/cmicetreatedat birth with Hereboth ofthese subsets are collectivelyreferred to as anti-idiotypicantibodies minuteamountsof anti-A48idiOtypeantibodies.J.Exp. Med.,158:1129- (a-Id). 1144, 1983. Abe: antibodies induced by immunization of the host with a-Id (Abe).A subset 11. Clemens,J. E., D'Antonio,M., and Narayan,0. Genomicchangesassociated of these may react with the same antigen as Abs. This set of antibodies Is further withantigenicvariationofvisnavirus.J. Mci.Biol.,158:41@-434,1982. subdivided into: 12. Montelaro,A.C., Parekh,B.,Orrego,;A.,andIssel,C.J. Antigenicvariation ldAg: reacting only with Abe. duringpersistentinfectionbyequineInfectiousanemiavirus,a retrovirus.J. Id'@Ag:sharing idiotopes with Ab@butnot binding to the antigen (existence all, Chem.,259:10539-10544,1984. of thisdiotypeis provenby inductionofAb, whichreactswithAb@J. 13. Sutton,L S., and Brooke,C. C. Venezuelanequineencephalomyelitisdueto ld@Ag@:sharingidiotopes with Ab, and binding to the antigen; mimics Abe. vaccinationinman.JAMA,155:1473—1476,1954. 14. Aandal,A.,Mills,J. W.,andEngel,L L Thepreparationandpropertiesofa purifiedequineencephalomyehtisvaccine.J.Immunol.,55:41-52,1947. 15. Smith,D. G., Katz,H. H.,andWagner,J.C. Venezuelanequineencephalo References myelitis.Preparationandevaluationofa partiallypurifiedvaccine.Bacteilol. . Proc., 1: 59, 1954. 1. Jerne,N. K. Towardsa networktheoryof the immunesystem.Ann.Immunol. 16. Aoehring,J. T., Hunt,A. A., and Mathews,J. H. IdentifiCatiOnofantildiotype (Paris), 125C: 373—389,1984. antibodiesthatmimictheneutralizationsiteof Venezuelanequineencephalo. 2. Noseworthy.J.H.,Fields,B.N.,Dichter,M.A.,Sobotka,C.,P1w,E.,Perry, myelitisin1984(Abstract).HighTechnologyRouteto VirusVaccines,p.32. L. L, Nepom,J. T., and Green,M. Cellreceptorsforthe mammalianreovirus Houston,TX:1984.

CANCER RESEARCH VOL 45 SEPTEMBER 1985 4690s

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H. Koprowski

Cancer Res 1985;45:4689s-4690s.

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