Cutting Edge: Requirement of MARCH-I-Mediated MHC II Ubiquitination for the Maintenance of Conventional Dendritic Cells

MARCH-I (membrane-associated RING-CH I) has been suggested as a physiological E3 ubiquitin ligase for both MHC class II (MHC II) and B7-2. In this study, we show that MARCH-I-mediated MHC II ubiquitination is necessary for the maintenance of conventional dendritic cell (cDC) functions in the steady...

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Veröffentlicht in:The Journal of immunology (1950) 2009-12, Vol.183 (11), p.6893-6897
Hauptverfasser: Ohmura-Hoshino, Mari, Matsuki, Yohei, Mito-Yoshida, Mari, Goto, Eiji, Aoki-Kawasumi, Masami, Nakayama, Manabu, Ohara, Osamu, Ishido, Satoshi
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container_end_page 6897
container_issue 11
container_start_page 6893
container_title The Journal of immunology (1950)
container_volume 183
creator Ohmura-Hoshino, Mari
Matsuki, Yohei
Mito-Yoshida, Mari
Goto, Eiji
Aoki-Kawasumi, Masami
Nakayama, Manabu
Ohara, Osamu
Ishido, Satoshi
description MARCH-I (membrane-associated RING-CH I) has been suggested as a physiological E3 ubiquitin ligase for both MHC class II (MHC II) and B7-2. In this study, we show that MARCH-I-mediated MHC II ubiquitination is necessary for the maintenance of conventional dendritic cell (cDC) functions in the steady state. MARCH-I-deficient cDCs accumulated MHC II and B7-2 and exhibited low Ag-presenting ability for exogenous Ags and low cytokine-producing ability upon stimulation in vivo. Importantly, MHC II, but not B7-2, was required for impaired cDC function induced by loss of MARCH-I in vivo. Moreover, MHC II knockin mice whose MHC II was not ubiquitinated showed dysfunction of cDC similar to that of MARCH-I knockout mice. These results suggest that the accumulation of MHC II resulting from loss of ubiquitination caused cDC abnormality; therefore, MARCH-I may function as a housekeeper of cDC in the steady state.
doi_str_mv 10.4049/jimmunol.0902178
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subjects Animals
Antigen Presentation - immunology
B7-2 Antigen - biosynthesis
B7-2 Antigen - immunology
CD4 Antigens - biosynthesis
CD4 Antigens - immunology
CD8 Antigens - biosynthesis
CD8 Antigens - immunology
Dendritic Cells - immunology
Dendritic Cells - metabolism
Flow Cytometry
Gene Expression
Gene Expression Regulation - immunology
Gene Knock-In Techniques
Genes, MHC Class II
Histocompatibility Antigens Class II - genetics
Histocompatibility Antigens Class II - immunology
Histocompatibility Antigens Class II - metabolism
Mice
Mice, Inbred C57BL
Mice, Knockout
Ubiquitin-Protein Ligases - genetics
Ubiquitin-Protein Ligases - immunology
Ubiquitin-Protein Ligases - metabolism
Ubiquitination - physiology
title Cutting Edge: Requirement of MARCH-I-Mediated MHC II Ubiquitination for the Maintenance of Conventional Dendritic Cells
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