PMID- 27229324 OWN - NLM STAT- MEDLINE DCOM- 20180515 LR - 20181202 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 6 DP - 2016 May 27 TI - The Balance between Conventional DCs and Plasmacytoid DCs Is Pivotal for Immunological Tolerance during Pregnancy in the Mouse. PG - 26984 LID - 10.1038/srep26984 [doi] LID - 26984 AB - Dendritic cells (DCs), which can shape their functions depending on the microenvironment, are crucial for the delicate balance of immunity and tolerance during pregnancy. However, the mechanism underlying the microenvironment-educated plasticity of DC differentiation during pregnancy remains largely unclear. Here, we found that the differentiation of conventional DCs (cDCs) and plasmacytoid DCs (pDCs) is regulated in a tissue-specific manner during pregnancy. The ratio of cDCs and pDCs remained constant in the spleen. However, the ratio changed in the para-aortic lymph nodes (LNs), where cDC percentages were significantly reduced concurrent with an increase in pDCs from E8.5 to E16.5. Moreover, the expansion of pDCs and T regulatory (Treg) cells was correlated in the para-aortic LNs, and pDCs had more potential to induce regulatory T cells (Tregs) compared with cDCs (independent of IDO expression). Notably, the balance between cDCs and pDCs is disrupted in IFN-gamma-induced abnormal pregnancy, accompanied by lower Treg percentages in the para-aortic LNs and decidua. To further identify the underlying mechanism, we found that elevated IFN-gamma can increase the levels of GM-CSF to alter the differentiation of pDCs into cDCs in vivo. Therefore, we provide a novel regulatory mechanism underlying pregnancy-related immune tolerance that involves the balance of DC subsets, which may offer a new target for the prevention of human spontaneous abortion. FAU - Fang, Wen-Ning AU - Fang WN AD - State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China. AD - University of Chinese Academy of Sciences, Beijing, People's Republic of China. FAU - Shi, Meng AU - Shi M AD - School of Biological Sciences, Nanyang Technological University, Singapore. FAU - Meng, Chao-Yang AU - Meng CY AD - State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China. AD - University of Chinese Academy of Sciences, Beijing, People's Republic of China. FAU - Li, Dan-Dan AU - Li DD AD - State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China. AD - University of Chinese Academy of Sciences, Beijing, People's Republic of China. FAU - Peng, Jing-Pian AU - Peng JP AD - State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160527 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 RN - 82115-62-6 (Interferon-gamma) RN - 83869-56-1 (Granulocyte-Macrophage Colony-Stimulating Factor) SB - IM MH - Animals MH - Aorta/cytology/drug effects/immunology MH - Cell Differentiation/drug effects MH - Decidua/cytology/*drug effects/immunology MH - Dendritic Cells/cytology/*drug effects/immunology MH - Embryo, Mammalian MH - Female MH - Granulocyte-Macrophage Colony-Stimulating Factor/immunology/metabolism MH - Humans MH - Immune Tolerance/*drug effects MH - Interferon-gamma/*pharmacology MH - Lymph Nodes/cytology/*drug effects/immunology MH - Mice MH - Mice, Inbred C57BL MH - Organ Specificity MH - Pregnancy MH - Spleen/cytology/*drug effects/immunology MH - T-Lymphocytes, Regulatory/cytology/drug effects/immunology PMC - PMC4882543 EDAT- 2016/05/28 06:00 MHDA- 2018/05/16 06:00 PMCR- 2016/05/27 CRDT- 2016/05/28 06:00 PHST- 2016/01/19 00:00 [received] PHST- 2016/05/10 00:00 [accepted] PHST- 2016/05/28 06:00 [entrez] PHST- 2016/05/28 06:00 [pubmed] PHST- 2018/05/16 06:00 [medline] PHST- 2016/05/27 00:00 [pmc-release] AID - srep26984 [pii] AID - 10.1038/srep26984 [doi] PST - epublish SO - Sci Rep. 2016 May 27;6:26984. doi: 10.1038/srep26984.