PMID- 31717517 OWN - NLM STAT- MEDLINE DCOM- 20200403 LR - 20200403 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 20 IP - 22 DP - 2019 Nov 9 TI - Distinct Subcellular Compartments of Dendritic Cells Used for Cross-Presentation. LID - 10.3390/ijms20225606 [doi] LID - 5606 AB - Dendritic cells (DCs) present exogenous protein-derived peptides on major histocompatibility complex class I molecules to prime naive CD8(+) T cells. This DC specific ability, called cross-presentation (CP), is important for the activation of cell-mediated immunity and the induction of self-tolerance. Recent research revealed that endoplasmic reticulum-associated degradation (ERAD), which was first identified as a part of the unfolded protein response-a quality control system in the ER-plays a pivotal role in the processing of exogenous proteins in CP. Moreover, DCs express a variety of immuno-modulatory molecules and cytokines to regulate T cell activation in response to the environment. Although both CP and immuno-modulation are indispensable, contrasting ER conditions are required for their correct activity. Since ERAD substrates are unfolded proteins, their accumulation may result in ER stress, impaired cell homeostasis, and eventually apoptosis. In contrast, activation of the unfolded protein response should be inhibited for DCs to express immuno-modulatory molecules and cytokines. Here, we review recent advances on antigen CP, focusing on intracellular transport routes for exogenous antigens and distinctive subcellular compartments involved in ERAD. FAU - Imai, Jun AU - Imai J AD - Laboratory of Physiological Chemistry, Faculty of Pharmacy, Takasaki University of Health and Welfare, Takasaki, Gunma 370-0033, Japan. FAU - Otani, Mayu AU - Otani M AD - Laboratory of Physiological Chemistry, Faculty of Pharmacy, Takasaki University of Health and Welfare, Takasaki, Gunma 370-0033, Japan. FAU - Sakai, Takahiro AU - Sakai T AD - Laboratory of Physiological Chemistry, Faculty of Pharmacy, Takasaki University of Health and Welfare, Takasaki, Gunma 370-0033, Japan. LA - eng PT - Journal Article PT - Review DEP - 20191109 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Histocompatibility Antigens Class I) SB - IM MH - Animals MH - *Antigen Presentation MH - CD8-Positive T-Lymphocytes/*immunology MH - Cross-Priming MH - Dendritic Cells/*immunology MH - Endoplasmic Reticulum-Associated Degradation MH - Histocompatibility Antigens Class I/immunology MH - Humans MH - Inflammation/immunology PMC - PMC6888166 OTO - NOTNLM OT - cross-presentation OT - dendritic cells OT - endoplasmic reticulum-associated degradation OT - inflammation OT - major histocompatibility class I OT - unfolded protein response COIS- The authors declare no conflict of interest. EDAT- 2019/11/14 06:00 MHDA- 2020/04/04 06:00 PMCR- 2019/11/01 CRDT- 2019/11/14 06:00 PHST- 2019/08/26 00:00 [received] PHST- 2019/10/29 00:00 [revised] PHST- 2019/11/06 00:00 [accepted] PHST- 2019/11/14 06:00 [entrez] PHST- 2019/11/14 06:00 [pubmed] PHST- 2020/04/04 06:00 [medline] PHST- 2019/11/01 00:00 [pmc-release] AID - ijms20225606 [pii] AID - ijms-20-05606 [pii] AID - 10.3390/ijms20225606 [doi] PST - epublish SO - Int J Mol Sci. 2019 Nov 9;20(22):5606. doi: 10.3390/ijms20225606.