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A key role for PTP1B in dendritic cell maturation, migration, and T cell activation

Journal of Molecular Cell Biology 2015年第6期7卷 517-528页

作者： Cristina Martin-Granados Alan R.Prescott samantha le sommer Izabela P.Klaska Tian Yu Elizabeth Muckersie Claudiu V.Giuraniuc Louise Grant Mirela Delibegovic John V.Forrester Institute of Medical Sciences University of AberdeenCollege of Life Sciences and MedicineAberdeen AB252ZDUK Department of Pharmacology University of CambridgeCambridge CB21PDUK Division of Cell Biology and Immunology College of Life SciencesUniversity of DundeeDundee DD15EHUK Centre for Ophthalmology and Visual Science The University of Western AustraliaPerthAustralia Centre for Experimental Immunology Lions Eye InstituteNedlandsWA 6009Australia

Dendritic cells(DC)are the major antigen-presenting cells bridging innate and adaptive immunity,a function they perform by converting quiescent DC to active,mature DC with the capacity to activate naı¨ve T *** do this by migrating from the tissues to the T cell area of the secondary lymphoid ***,wedemonstrate thatmyeloid cell-specific genetic deletion of PTP1B(LysM PTP1B)leads to defects in lipopolysaccharide-driven bone marrow-derivedDC(BMDC)activation associated with increased levels of phosphorylated *** showthatmyeloid cell-specific PTP1Bdeletion also causes decreased migratory capacity of epidermal DC,aswell as reduced CCR7 expression and chemotaxis to CCL19 by ***1B deficiency in BMDC also impairs their migration in ***,immature LysM PTP1B BMDC display fewer podosomes,increased levels of phosphorylated Src at tyrosine 527,and loss of Src localization to podosome *** co-culture with T cells,LysM PTP1B BMDC establish fewer and shorter contacts than control ***,LysMPTP1BBMDCfail to present antigen to T cells as efficiently as *** data provide first evidence for a key regulatory role for PTP1B in mediating a central DC function of initiating adaptive immune responses in response to innate immune cell activation.

关键词： dendritic cell maturation podosomes T cell activation adaptive immune response protein tyrosine phosphatase 1B

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