PMID- 31891674 OWN - NLM STAT- MEDLINE DCOM- 20200724 LR - 20211125 IS - 1096-0007 (Electronic) IS - 0014-4835 (Print) IS - 0014-4835 (Linking) VI - 191 DP - 2020 Feb TI - Human umbilical cord mesenchymal stem cells alleviate ongoing autoimmune dacryoadenitis in rabbits via polarizing macrophages into an anti-inflammatory phenotype. PG - 107905 LID - S0014-4835(19)30821-8 [pii] LID - 10.1016/j.exer.2019.107905 [doi] AB - Mesenchymal stem cells (MSCs) exhibit beneficial effects on autoimmune dacryoadenitis. However, the underlying mechanisms are not fully understood. In this study, we investigated the therapeutic effect of human umbilical cord mesenchymal stem cells (hUC-MSCs) on rabbit autoimmune dacryoadenitis, an animal model of Sjogren's syndrome (SS) dry eye, and explored whether the effects of MSCs were related to their modulation on macrophage polarization. We have showed that systemic infusion of hUC-MSCs after disease onset efficiently diminished the chronic inflammation in diseased LGs and improved the clinical symptoms. Further analysis revealed that hUC-MSC treatment significantly inhibited the expression of pro-inflammatory M1 macrophage markers iNOS, TNF-alpha and IL-6, and promoted the expression of anti-inflammatory M2 macrophage markers Arg1, CD206, IL-10, IL-4 and TGF-beta in LGs. Mechanistically, hUC-MSCs activated AKT pathway in macrophages, resulting in upregulation of M2-associated molecule Arg1, which was partly abolished by PI3K inhibitor, LY294002. Together, our data indicated that hUC-MSCs can skew macrophages into an M2 phenotype via affecting AKT pathway. These data may provide a new insight into the mechanisms of hUC-MSCs in the therapy of SS dry eye. CI - Copyright (c) 2020 Elsevier Ltd. All rights reserved. FAU - Lu, Xiaoxiao AU - Lu X AD - Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China. FAU - Li, Na AU - Li N AD - Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China. FAU - Zhao, Lu AU - Zhao L AD - Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China. FAU - Guo, Di AU - Guo D AD - Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China. FAU - Yi, Huanfa AU - Yi H AD - Central Laboratory of the Eastern Division, The First Hospital, Jilin University, Changchun, China. FAU - Yang, Liyuan AU - Yang L AD - Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China. FAU - Liu, Xun AU - Liu X AD - Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China. FAU - Sun, Deming AU - Sun D AD - Doheny Eye Institute, And Department of Ophthalmology, David Geffen School of Medicine, University of California Los Angeles (UCLA), Los Angeles, USA. FAU - Nian, Hong AU - Nian H AD - Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China. Electronic address: nianhong@126.com. FAU - Wei, Ruihua AU - Wei R AD - Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China. Electronic address: rwei@tmu.edu.cn. LA - eng GR - R01 EY018827/EY/NEI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20191228 PL - England TA - Exp Eye Res JT - Experimental eye research JID - 0370707 RN - 0 (Anti-Inflammatory Agents) SB - IM MH - Animals MH - Anti-Inflammatory Agents/*metabolism MH - Autoimmune Diseases/immunology/*prevention & control MH - Blotting, Western MH - Cell Culture Techniques MH - Dacryocystitis/immunology/*prevention & control MH - Disease Models, Animal MH - Fluorescent Antibody Technique, Indirect MH - Humans MH - Macrophage Activation MH - Macrophages/*immunology MH - *Mesenchymal Stem Cell Transplantation MH - Mesenchymal Stem Cells/*physiology MH - Phenotype MH - Rabbits MH - Real-Time Polymerase Chain Reaction MH - Umbilical Cord/*cytology PMC - PMC8612174 MID - NIHMS1755898 OTO - NOTNLM OT - Autoimmune dacryoadenitis OT - Human umbilical cord mesenchymal stem cells OT - Inflammatory mediators OT - Macrophages COIS- Conflicting interest statement The authors declare that they have no competing financial interests. EDAT- 2020/01/01 06:00 MHDA- 2020/07/25 06:00 PMCR- 2021/11/24 CRDT- 2020/01/01 06:00 PHST- 2019/11/05 00:00 [received] PHST- 2019/12/08 00:00 [revised] PHST- 2019/12/27 00:00 [accepted] PHST- 2020/01/01 06:00 [pubmed] PHST- 2020/07/25 06:00 [medline] PHST- 2020/01/01 06:00 [entrez] PHST- 2021/11/24 00:00 [pmc-release] AID - S0014-4835(19)30821-8 [pii] AID - 10.1016/j.exer.2019.107905 [doi] PST - ppublish SO - Exp Eye Res. 2020 Feb;191:107905. doi: 10.1016/j.exer.2019.107905. Epub 2019 Dec 28.