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Li D, Pan L, Zhang X, Jiang Z. Lower Oligomeric Form of Surfactant Protein D in Murine Acute Lung Injury Induces M1 Subtype Macrophages Through Calreticulin/p38 MAPK Signaling Pathway. Front Immunol 2021; 12:687506. [PMID: 34484184 PMCID: PMC8415422 DOI: 10.3389/fimmu.2021.687506] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 07/27/2021] [Indexed: 11/22/2022] Open
Abstract
Surfactant protein D (SP-D) plays an important role in innate and adaptive immune responses. In this study, we found that the expression of total and de-oligomerized SP-D was significantly elevated in mice with lipopolysaccharide (LPS)-induced acute lung injury (ALI). To investigate the role of the lower oligomeric form of SP-D in the pathogenesis of ALI, we treated bone marrow-derived macrophages (BMDMs) with ALI-derived bronchoalveolar lavage (BAL) and found that SP-D in ALI BAL predominantly bound to calreticulin (CALR) on macrophages, subsequently increasing the phosphorylation of p38 mitogen-activated protein kinase (MAPK) and expression of interleukin (IL)-6, tumor necrosis factor (TNF)-alpha, IL-10, and CD80. However, anti-SP-D (aSP-D) and anti-calreticulin (aCALR) pretreatment reversed the SP-D binding and activation of macrophages induced by ALI BAL or de-oligomerized recombinant murine SP-D (rSP-D). Lack of signal transducer and activator of transcription (STAT)6 in STAT6-/- macrophages resulted in resistance to suppression by aCALR. Further studies in an ALI mouse model showed that blockade of pulmonary SP-D by intratracheal (i.t.), but not intraperitoneal (i.p.), administration of aSP-D attenuated the severity of ALI, accompanied by lower neutrophil infiltrates and expression of IL-1beta and IL-6. Furthermore, i.t. administration of de-oligomerized rSP-D exacerbated the severity of ALI in association with more pro-inflammatory CD45+Siglec-F(-) M1 subtype macrophages and production of IL-6, TNF-alpha, IL-1beta, and IL-18. The results indicated that SP-D in the lungs of murine ALI was de-oligomerized and participated in the pathogenesis of ALI by predominantly binding to CALR on macrophages and subsequently activating the pro-inflammatory downstream signaling pathway. Targeting de-oligomerized SP-D is a promising therapeutic strategy for the treatment of ALI and acute respiratory distress syndrome (ARDS).
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Affiliation(s)
- Dandan Li
- Department of Pulmonary and Critical Care Medicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, China.,Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Linyue Pan
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xiaoju Zhang
- Department of Pulmonary and Critical Care Medicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhilong Jiang
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
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Jin J, Qian H, Wan B, Zhou L, Chen C, Lv Y, Chen M, Zhu S, Ye L, Wang X, Xu W, Lv T, Song Y. Geranylgeranyl diphosphate synthase deficiency hyperactivates macrophages and aggravates lipopolysaccharide-induced acute lung injury. Am J Physiol Lung Cell Mol Physiol 2021; 320:L1011-L1024. [PMID: 33729030 DOI: 10.1152/ajplung.00281.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Macrophage activation is a key contributing factor for excessive inflammatory responses of acute lung injury (ALI)/acute respiratory distress syndrome (ARDS). Geranylgeranyl diphosphate synthase (GGPPS) plays a key role in the development of inflammatory diseases. Our group previously showed that GGPPS in alveolar epithelium have deleterious effects on acute lung injury induced by LPS or mechanical ventilation. Herein, we examined the role of GGPPS in modulating macrophage activation in ALI/ARDS. We found significant increased GGPPS expression in alveolar macrophages in patients with ARDS compared with healthy volunteers and in ALI mice induced by LPS. GGPPS-floxed control (GGPPSfl/fl) and myeloid-selective knockout (GGPPSfl/flLysMcre) mice were then generated. Interestingly, using an LPS-induced ALI mouse model, we showed that myeloid-specific GGPPS knockout significantly increased mortality, aggravated lung injury, and increased the accumulation of inflammatory cells, total protein, and inflammatory cytokines in BALF. In vitro, GGPPS deficiency upregulated the production of LPS-induced IL-6, IL-1β, and TNF-α in alveolar macrophages, bone marrow-derived macrophages (BMDMs), and THP-1 cells. Mechanistically, GGPPS knockout increased phosphorylation and nuclear translocation of NF-κB p65 induced by LPS. In addition, GGPPS deficiency increased the level of GTP-Rac1, which was responsible for NF-κB activation. In conclusion, decreased expression of GGPPS in macrophages aggravates lung injury and inflammation in ARDS, at least partly by regulating Rac1-dependent NF-κB signaling. GGPPS in macrophages may represent a novel therapeutic target in ARDS.
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Affiliation(s)
- Jiajia Jin
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, the First School of Clinical Medicine, Southern Medical University (Guangzhou), Nanjing, China.,Department of Respiratory Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Hong Qian
- Department of Orthopaedic Surgery, Jinling Hospital, the First School of Clinical Medicine, Southern Medical University, Nanjing, China
| | - Bing Wan
- Department of Respiratory and Critical Care Medicine, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, China
| | - Li Zhou
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Cen Chen
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, the First School of Clinical Medicine, Southern Medical University (Guangzhou), Nanjing, China
| | - Yanling Lv
- The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, China
| | - Meizi Chen
- Department of General Internal Medicine, the First People's Hospital of Chenzhou, Chenzhou, China
| | - Suhua Zhu
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, the First School of Clinical Medicine, Southern Medical University (Guangzhou), Nanjing, China
| | - Liang Ye
- Department of Respiratory Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Xiaoxia Wang
- Department of Intensive Care Unit, Inner Mongolia People's Hospital, Inner Mongolia Autonomous Region, Hohhot, China
| | - Wujian Xu
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, the First School of Clinical Medicine, Southern Medical University (Guangzhou), Nanjing, China
| | - Tangfeng Lv
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, the First School of Clinical Medicine, Southern Medical University (Guangzhou), Nanjing, China
| | - Yong Song
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, the First School of Clinical Medicine, Southern Medical University (Guangzhou), Nanjing, China
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Hu L, Chen Z, Li L, Jiang Z, Zhu L. Resveratrol decreases CD45 + CD206 - subtype macrophages in LPS-induced murine acute lung injury by SOCS3 signalling pathway. J Cell Mol Med 2019; 23:8101-8113. [PMID: 31559687 PMCID: PMC6850919 DOI: 10.1111/jcmm.14680] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 08/13/2019] [Accepted: 08/25/2019] [Indexed: 02/06/2023] Open
Abstract
Acute lung injury/acute respiratory distress syndrome (ALI/ARDS) are life-threatening condition in critically ill patients. Resveratrol (Res), a natural polyphenol, has therapeutic effect in animal model with ALI; however, whether Res attenuates ALI through modulation of macrophage phenotypes in the animal model remains unknown. We in this study treated LPS-induced murine ALI with 30 mg/kg Res and observed significantly reduced severity of ALI in the Res-treated mice 48 hours after Res treatment. Neutrophil infiltrates were significantly reduced, accompanied with lower infiltration of CD45+ Siglec F- phenotype macrophages, but higher population of CD45+ Siglec F+ and CD45+ CD206+ alternatively activated macrophages (M2 cells) in the Res-treated mice with ALI. In addition, the expression of IL-1beta and CXCL15 cytokines was suppressed in the treated mice. However, Res treatment in mice with myeloid cell-restricted SOCS3 deficiency did not significantly attenuate ALI severity and failed to increase population of both CD45+ Siglec F+ and CD45+ CD206+ M2 subtype macrophages in the murine ALI. Further studies in wild-type macrophages revealed that Res treatment effectively reduced the expression of IL-6 and CXCL15, and increased the expression of arginase-1, SIRT1 and SOCS3. However, macrophages' lack of SOCS3 expression were resistant to the Res-induced suppression of IL-6 and CXCL15 in vitro. Thus, we conclude that Res suppressed CD45+ Siglec F- and CD45+ CD206- M1 subtype macrophages through SOCS3 signalling in the LPS-induced murine ALI.
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Affiliation(s)
- Lu Hu
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhihong Chen
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Liyang Li
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhilong Jiang
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lei Zhu
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
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