7 jours d'essai offerts
Cet ouvrage et des milliers d'autres sont disponibles en abonnement pour 8,99€/mois

Share this publication

You may also like

*Haematologica ELT10 Medline prev htm> index next *The CD4+ CD56+ CD116 CD123+ CD45RA+ CD45RO profile is specific to DC2 malignancies* Trimoreau Franck Donnard Magali Turlure Pascal Gachard Nathalie Bordessoule Dominique Feuillard Jean Correspondence: Jean Feuillard Laboratoire d Hématologie CHU Dupuytren av Martin Luther King Limoges France Phone Fax number CD4+ CD56+ malignancies also called blastic NK lymphoma leukemia are a recently described entity^1 and blast cells are considered as the leukemic counterpart of type dendritic cells DC2 Differential diagnosis may sometimes be difficult because it is based mainly on the absence of B T or myeloid lineage markers lin in addition to CD4 and CD56 expression This stresses the need for other specific criteria to recognize these tumors independently of the lin profile Like on normal DC2 co expression of the IL receptor CD123 and CD45RA in the absence of GM CSF receptor CD116 and CD45RO was systematically observed in these tumors Moreover CD36 was expressed in most cases CD123 is widely expressed in AML It has been identified as a marker for AML stem cells CD34+CD38 leukemia cells CD116 has been preferentially associated with M4 M5 subtype of AML but is not specific^7 Neither CD45RA nor CD45RO is lineage specific CD36 is expressed by monocytic erythroblast and megakaryoblast cells This raises the question of the specificity of a DC2 immunophenotypic profile rather than of each individual marker We therefore evaluated the expression of CD4 CD56 CD123 CD116 CD45RA CD45RO and CD36 in acute leukemia and myelodysplastic syndromes MDS in order to evaluate the specificity of a DC2 malignancies profile that we defined as CD4+ CD56+ CD116 CD123+ CD45RA+ CD45RO Ninety six patients were studied according to FAB and EGIL recommendations with single lineage acute myeloid leukemia AML M0: M1: M2: M3: M4: M5: M6: M7: unclassified with ...

from profil-zyak-2012

next
April18,200816:58WSPC-ProceedingsTrimSize:9inx6inqmath10RepeatedInteractionQuantumSystems:DeterministicandRandomAlainJoyeInstitutFourierUniversite´deGrenoble47PB38402SaintMartind’He`res,FranceThispapergivesanoverviewofrecentresultsconcerningthelongtimedy-namicsofrepeatedinteractionquantumsystemsinadeterministicandran-domframework.Wedescribethenonequilibriumsteadystates(NESS)suchsystemsdisplayandwepresent,asamacroscopicconsequence,asecondlawofthermodynamicstheseNESSgiveriseto.Wealsoexplaininsomedetailstheanalysisofproductsofcertainrandommatricesunderlyingthisdynamicalproblem.Keywords:Nonequilibriumquantumstatisticalmechanics,Repeatedinterac-tionquantumsystems,Productsofrandommatrices11.IntroductionandModelArepeatedinteractionquantumsystemconsistsofareferencequantumsubsystemSwhichinteractssuccessivelywiththeelementsEmofachainC=E1+E2+∙∙∙ofindependentquantumsystems.Ateachmomentintime,SinteractspreciselywithoneEm(mincreasesastimedoes),whiletheotherelementsinthechainevolvefreelyaccordingtotheirintrinsicdynamics.ThecompleteevolutionisdescribedbytheintrinsicdynamicsofSandofalltheEm,plusaninteractionbetweenSandEm,foreachm.Thelatterischaracterizedbyaninteractiontimeτm>0,andaninteractionoperatorVm(actingonSandEm);duringthetimeinterval[τ1+∙∙∙+τm11+∙∙∙+τm),SiscoupledtoEmonlyviaVm.Systemswiththisstructureareimportantfromaphysicalpointofview,sincetheyarisenaturallyasmodelsforfunda-mentalexperimentsontheinteractionofmatterwithquantizedradiation.Asanexample,the“Oneatommaser”providesanexperimentalsetupinwhichthesystemSrepresentsamodeoftheelectromagneticfield,whereastheelementsEkdescribeatomsinjectedinthecavity,onebyone,which
April18,200816:58WSPC-ProceedingsTrimSize:9inx6inqmath102interactwiththefieldduringtheirflightinthecavity.Aftertheyleavethecavity,theatomsencodesomepropertiesofthefieldwhichcanbemea-suredontheseatoms14,16Forrepeatedinteractionsystemsconsideredasideal,i.e.suchthatallatomsareidenticalwithidenticalinteractionsandtimesofflightthroughthecavity,correspondingmathematicalanalysesareprovidedin17,7Totakeintoaccounttheunavoidablefluctuationsintheexperimentsetupusedtostudytheserepeatedinteractionsystems,mod-elizationsincorporatingrandomnesshavebeenproposedandstudiedin8and.9Withadifferentperspective,repeatedquantuminteractionmodelsalsoappearnaturallyinthemathematicalstudyofmodelizationofopenquantumsystemsbymeansofquantumnoises,see4andreferencestherein.Any(continuous)masterequationgoverningthedynamicsofstatesonasystemScanbeviewedastheprojectionofaunitaryevolutiondrivingthesystemSandafieldofquantumnoisesininteraction.Itisshownin4howtorecoversuchcontinuousmodelsassomedelicatelimitofadiscretizationgivenbyarepeatedquantuminteractionmodel.Letusfinallymention15forresultsofasimilarflavourinasomewhatdifferentframework.Ourgoalistopresenttheresultsofthepapers7,8and9on(random)repeatedinteractionquantumsystems,whichfocusonthelongtimebe-haviourofthesesystems.Letusdescribethemathematicalframeworkusedtodescribethesequantumdynamicalsystems.Accordingtothefundamentalprinciplesofquantummechanics,statesofthesystemsSandEmaregivenbynormal-izedvectors(ordensitymatrices)onHilbertspacesHSandHEm,respec-tively,3,6a.WeassumethatdimHS<,whiledimHEmmaybeinfinite.ObservablesASandAEmofthesystemsSandEmareboundedopera-torsformingvonNeumannalgebrasMS⊂B(HS)andMEm⊂B(HEm).TheyevolveaccordingtotheHeisenbergdynamicsR3t7→αtS(AS)andtttR3t7→αEm(AEm),whereαSandαEmare-automorphismgroupsofMSandMEm,respectively,seee.g.6Wenowintroducedistinguishedreferencestates,givenbyvectorsψS∈HSandψEm∈HEm.TypicalchoicesforψS,ψEmareequilibrium(KMS)statesforthedynamicsαtS,αtEm,atinversetemperaturesβS,βEm.TheHilbertspaceofstatesofthetotalsystemisthetensorproductH=HS⊗HC,aAnormalizedvectorψdefinesa“pure”stateA7→hψ,Aψi=TrP(%ψA),where%ψ=|ψihψ|.Ageneral“mixed”stateisgivenbyadensitymatrix%=n1pn%ψn,wheretheprobabilitiespn0sumuptoone,andwheretheψnarenormalizedvectors.