摘要
ToobtainshortpeptidessimulatingantigenicepitopesrelatedtonaturalresistanceagainstSchistosomajaponicum(S.j)inrots,andtoexploretheirimmuneprotectionagainstS.jinmice,phagerandompeptidelibraryof12aminoacidswerescreenedwithpurifiedIgGfromnormalratsere.PositiveclonesthatwereobtainedafterthreeroundsofbioparmingweredetectedbyEI,ISA,andtwoofthemweresequenced.Kunmingmicewereimmunizedwithmixedphageclones.Eachmousewaschallengedwith40±1S.jcercariae,andallmicewereperfused45dayspost-challenge.Thewormsandthelivereggswerecounted.TheresultswerethatthespecificphagesbindingtoIgGwereenriched300foldsafterthreeroundsofbiopanning.TwentyclonesweredetectedbyELISAand19ofthemboundtothespecificIgGofratsera.ThesequenceoftwoclonesrevealednohomologywithothersequencesintheGenBank.Comparedwiththecontrolgroups,thereductionratesofthewormburdenandlivereggwere33.6%and59.8%,respectively.Itwasconcludedthatthespecificpeptides,whichsimulateantigenicmoleculescorrelatedwithnaturalresistancetoS.jinratscouldbeobtainedbyimmunosceeningphagerandompeptidelibraryandaprotectiveimmunityagainstS.jcanbedetectedbytheseepitopesinmice.
出版日期
2003年01月11日(中国期刊网平台首次上网日期,不代表论文的发表时间)