Thrombocytopenia, Neonatal AlloimmuneAntigens, Human PlateletIsoantibodiesIsoantigensGraft RejectionTransplantation, HomologousHLA-DRB3 ChainsHeart TransplantationThrombocytopeniaTransplantation ToleranceSkin TransplantationTransplantation ImmunologyBlood Transfusion, IntrauterineErythroblastosis, FetalGraft SurvivalPlatelet TransfusionTransplantation, HeterotopicHistocompatibility, Maternal-FetalLymphocyte Culture Test, MixedMaternal-Fetal ExchangePlatelet CountRats, Inbred WFPurpura, ThrombocytopenicMice, Inbred BALB CImmunoglobulins, IntravenousImmunoconjugatesOrgan TransplantationIslets of Langerhans TransplantationMice, Inbred C57BLInfant, Newborn, DiseasesAntibodies, BlockingInfant, NewbornT-LymphocytesCorneal TransplantationIntegrin alpha2Antigens, CD28Lymphocyte ActivationLung TransplantationIntegrin beta3PregnancyImmune ToleranceMast-Cell SarcomaIntracranial HemorrhagesBronchiolitis ObliteransBlood PlateletsT-Lymphocytes, RegulatoryImmunosuppressive AgentsTissue DonorsTransplantation, IsogeneicHLA AntigensCD4-Positive T-LymphocytesPlatelet Membrane GlycoproteinsAntigens, CD80CTLA-4 AntigenImmunosuppressionMice, Inbred C3HAntibodies, MonoclonalAutoimmunityFetal DiseasesBlood Group IncompatibilityKidney TransplantationMinor Histocompatibility AntigensAntigens, DifferentiationHistocompatibilityMice, Inbred CBARats, Inbred LewPurpura, Thrombocytopenic, IdiopathicAntibodiesAutoimmune DiseasesAntigens, CDMice, KnockoutAutoantibodiesCytotoxicity, ImmunologicMice, Inbred DBACD40 LigandImmunity, CellularBlood TransfusionImmunoglobulin GCytokinesAntigen-Presenting CellsGraft vs Host DiseaseT-Lymphocytes, CytotoxicFlow CytometryCD8-Positive T-LymphocytesLymphocyte DepletionDendritic CellsTh1 CellsTh2 CellsEpitopesInterferon-gammaHistocompatibility Antigens Class IInterleukin-2Forkhead Transcription FactorsHematopoietic Stem Cell TransplantationT-Lymphocyte SubsetsMice, TransgenicAdoptive TransferModels, AnimalSpleenEnzyme-Linked Immunosorbent Assay