PMID- 29284516 OWN - NLM STAT- MEDLINE DCOM- 20181102 LR - 20181113 IS - 1465-993X (Electronic) IS - 1465-9921 (Print) IS - 1465-9921 (Linking) VI - 18 IP - 1 DP - 2017 Dec 29 TI - Lack of SOCS3 increases LPS-induced murine acute lung injury through modulation of Ly6C(+) macrophages. PG - 217 LID - 10.1186/s12931-017-0707-6 [doi] LID - 217 AB - BACKGROUND: SOCS3 (suppressor of cytokine signaling 3) is a negative regulator of JAK/STAT3 signaling pathway and participates in the regulation of lung inflammation in a mouse model with acute lung injury (ALI). However, it is not well understood how SOCS3 regulates lung inflammation in the ALI mouse model. METHOD: In the present study, we investigated the effects of SOCS3 on modulation of Ly6C(+) monocyte phenotypes in a mouse model with lipopolysaccharide (LPS)-induced ALI. Conditional SOCS3(Lyz2cre) mice with myeloid cell-restricted depletion of SOCS3 gene were created by breeding transgenic Lyz2Cre mice with SOCS3(fl/fl) mice. Wilde-type (WT) and SOCS3(Lyz2cre) mice were intratracheal instilled with 5 mg/kg LPS for 2 days. Lung, bronchoalveolar lavage (BAL) and blood were collected for analysis by flow cytometry, ELISA, qRT-PCR and Western blot analysis. RESULTS: The studies in the ALI mouse model revealed that myeloid cell-restricted SOCS3 deficiency exacerbated the severity of ALI as compared to the WT mice. The increased severity of ALI in SOCS3-deficient mice was associated with higher populations of neutrophils, T lymphocytes and Ly6C(+) monocytes in the inflamed lung tissues. In addition, CCR2 and CXCL15 were elevated, and accompanied by greater expression and activation of STAT3 in the lung of SOCS3-deficient mice. SOCS3-deficient bone marrow-derived macrophages (BMDMs) expressed a higher amount of TNF-alpha, and adoptive transfer of the SOCS3-deficient Ly6C(+) BMDMs into WT mice enhanced the severity of ALI than adoptive transfer of WT control BMDMs. However, depletion of Ly6C(+) circulating monocytes by anti-Ly6C(+) neutralizing antibody moderately attenuated neutrophil infiltration and resulted in lower prevalence of Ly6C(+) cells in the lung of treated mice. CONCLUSION: Myeloid cell-restricted lack of SOCS3 induced more severe ALI through modulation of Ly6C(+) subtype macrophages. The results provide insight into a new role of SOCS3 in modulation of Ly6C(+) monocyte phenotypes and provide a novel therapeutic strategy for ALI by molecular intervention of macrophages subtypes. FAU - Jiang, Zhilong AU - Jiang Z FAU - Chen, Zhihong AU - Chen Z FAU - Li, Liyang AU - Li L FAU - Zhou, Wenjun AU - Zhou W FAU - Zhu, Lei AU - Zhu L AD - Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, 180 Feng Lin Road, Shanghai, 200032, China. zhu.lei@zs-hospital.sh.cn. LA - eng GR - A654116001/Zhongshan Hospital, Fudan University in China/International GR - 81270078 and 81470211/National Natural Science Foundation of China/International GR - 81270137 and 81300054/National Natural Science Foundation of China/International GR - 15GWZK0102/Shanghai three-year plan of the key subject construction in public health-infectious diseases and pathogenic microorganism/International PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20171229 PL - England TA - Respir Res JT - Respiratory research JID - 101090633 RN - 0 (Antigens, Ly) RN - 0 (Lipopolysaccharides) RN - 0 (Ly-6C antigen, mouse) RN - 0 (Socs3 protein, mouse) RN - 0 (Suppressor of Cytokine Signaling 3 Protein) SB - IM MH - Acute Lung Injury/*chemically induced/immunology/*metabolism MH - Animals MH - Antigens, Ly/immunology/*metabolism MH - Cells, Cultured MH - Lipopolysaccharides/*toxicity MH - Macrophages/drug effects/immunology/*metabolism MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Mice, Transgenic MH - Suppressor of Cytokine Signaling 3 Protein/*deficiency/immunology PMC - PMC5747159 OTO - NOTNLM OT - Acute lung injury OT - JAK/STAT3 signaling OT - Ly6C(+) macrophages OT - SOCS3 COIS- ETHICS APPROVAL: All animal protocols were reviewed and approved by the laboratory animal care and use committee of Zhongshan Hospital, Fudan University. CONSENT FOR PUBLICATION: Not applicable. COMPETING INTERESTS: The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. None of the authors affiliated with this manuscript have any commercial or associations that might pose a conflict interest. PUBLISHER'S NOTE: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. EDAT- 2017/12/30 06:00 MHDA- 2018/11/06 06:00 PMCR- 2017/12/29 CRDT- 2017/12/30 06:00 PHST- 2017/10/07 00:00 [received] PHST- 2017/12/18 00:00 [accepted] PHST- 2017/12/30 06:00 [entrez] PHST- 2017/12/30 06:00 [pubmed] PHST- 2018/11/06 06:00 [medline] PHST- 2017/12/29 00:00 [pmc-release] AID - 10.1186/s12931-017-0707-6 [pii] AID - 707 [pii] AID - 10.1186/s12931-017-0707-6 [doi] PST - epublish SO - Respir Res. 2017 Dec 29;18(1):217. doi: 10.1186/s12931-017-0707-6.