PMID- 26030023 OWN - NLM STAT- MEDLINE DCOM- 20150916 LR - 20210102 IS - 1529-2916 (Electronic) IS - 1529-2908 (Print) IS - 1529-2908 (Linking) VI - 16 IP - 7 DP - 2015 Jul TI - The transcription factor TFEB acts as a molecular switch that regulates exogenous antigen-presentation pathways. PG - 729-36 LID - 10.1038/ni.3196 [doi] AB - Dendritic cells (DCs) can initiate immune responses by presenting exogenous antigens to T cells via both major histocompatibility complex (MHC) class I pathways and MHC class II pathways. Lysosomal activity has an important role in modulating the balance between these two pathways. The transcription factor TFEB regulates lysosomal function by inducing lysosomal activation. Here we report that TFEB expression inhibited the presentation of exogenous antigen by MHC class I while enhancing presentation via MHC class II. TFEB promoted phagosomal acidification and protein degradation. Furthermore, we found that the activation of TFEB was regulated during DC maturation and that phagosomal acidification was impaired in DCs in which the gene encoding TFEB was silenced. Our data indicate that TFEB is a key participant in the differential regulation of the presentation of exogenous antigens by DCs. FAU - Samie, Mohammad AU - Samie M AD - Department of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, Connecticut, USA. FAU - Cresswell, Peter AU - Cresswell P AD - Department of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, Connecticut, USA. LA - eng GR - R01 AI097206/AI/NIAID NIH HHS/United States GR - R01-AI097206/AI/NIAID NIH HHS/United States GR - Howard Hughes Medical Institute/United States GR - P30 CA016359/CA/NCI NIH HHS/United States GR - T32 HL007974/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20150601 PL - United States TA - Nat Immunol JT - Nature immunology JID - 100941354 RN - 0 (Antigens) RN - 0 (Basic Helix-Loop-Helix Leucine Zipper Transcription Factors) RN - 0 (Histocompatibility Antigens Class II) RN - 0 (Tcfeb protein, mouse) SB - IM MH - Animals MH - Antigen Presentation/*immunology MH - Antigens/*immunology MH - Basic Helix-Loop-Helix Leucine Zipper Transcription Factors/genetics/*immunology/metabolism MH - Cells, Cultured MH - Chlorocebus aethiops MH - Cross-Priming/immunology MH - Flow Cytometry MH - HEK293 Cells MH - Histocompatibility Antigens Class II/immunology MH - Humans MH - Hydrogen-Ion Concentration MH - Mice, Inbred C57BL MH - Microscopy, Confocal MH - Phagosomes/immunology/metabolism MH - Proteolysis MH - RNA Interference/immunology MH - Signal Transduction/*immunology MH - Spleen/cytology/immunology/metabolism MH - Vero Cells PMC - PMC5609676 MID - NIHMS897594 EDAT- 2015/06/02 06:00 MHDA- 2015/09/17 06:00 PMCR- 2017/09/22 CRDT- 2015/06/02 06:00 PHST- 2015/02/24 00:00 [received] PHST- 2015/05/05 00:00 [accepted] PHST- 2015/06/02 06:00 [entrez] PHST- 2015/06/02 06:00 [pubmed] PHST- 2015/09/17 06:00 [medline] PHST- 2017/09/22 00:00 [pmc-release] AID - ni.3196 [pii] AID - 10.1038/ni.3196 [doi] PST - ppublish SO - Nat Immunol. 2015 Jul;16(7):729-36. doi: 10.1038/ni.3196. Epub 2015 Jun 1.