Expressed Sequence Tags of Trichinella spiralis Muscle

Expressed Sequence Tags of Trichinella spiralis Muscle

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1、ORIGINALARTICLESKoreanJParasitol.Vol.46,No.2:59-63,June2008DOI:10.3347/kjp.2008.46.2.59ExpressedSequenceTagsofTrichinellaspiralisMuscleStageLarvaeHaeKyungPark1,3,SeongWonChang2,SeWonKang4,MinKyoungCho2,SunHeeChoi2,YeonChulHong5,YongSeokLee4,HaeJinJeong2,3andHakSunYu2,3,�1DepartmentofInternalMedi

2、cine;2DepartmentofParasitology,SchoolofMedicine,PusanNationalUniversity,Busan609-735,Korea;3PusanNationalUniversityHospitalMedicalResearchInstitute,Busan602-739,Korea;4DepartmentofParasitologyandMalariology,PICR,CollegeofMedicineandFrontierInjeResearchforScienceandTechnology,InjeUniversity,Busan

3、614-735,Korea;5DepartmentofParasitology,SchoolofMedicine,KyungpookNationalUniversity,Daegu700-422,KoreaAbstract:InordertoobtaingreaterinsightintotherelevantgenomicexpressionpatternsofTrichinellaspiralis,992expressedsequencetags(ESTs)werecollectedfromacDNAlibraryofT.spiralismusclestagelarvaeandas

4、sembledinto60clus-tersand385singletons.Ofthem,445(44.7%)ESTswereannotatedtotheirhomologousgenes,andsmallfractionswerematchedtoknowngenesofnematodes.TheannotatedESTswereclassifiedinto25eukaryoticorthologousgroups(KOG).CytochromeCoxidase(34clones)wasfoundtobemostfrequentspecies.Keywords:Trichinell

5、aspiralis,Expressedsequencetags,musclestagelarva,eukaryoticorthologousgroups(KOG)INTRODUCTIONmusclefibers,theyencyst,undergodevelopment,becomeinfec-tivewithin15days,andremainformonthstoyears.GenusTrichinella,whichconsistsofseveralspecies,isfoundTrichinellaspiralisevidencesseveralbiologicaldiffer

6、encesthattoinfectmammals,birds,andreptiles.Thesenematodesalter-includehostspecificity,phenotypiccharacteristicsinducedinnateentericandskeletalmusclestagesduringtheirlifecycle.T.infectedhostcells,andinteractionswiththehostimmunesystem.spiralisisarelativelysmallnematode,adultfemalebeing1.4-4.0Addi

7、tionally,eachoftheseparasitesmustmigrateextracellularlymm,adultmale1.4-1.8mm,andmusclestagelarvaeapproxi-throughthetissuesofthehostinordertoinfectthevarioushostmately1mmlong[1,2].Thelifecycleofthisnematodebeginscellstheyinha

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