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Shao M, Chen J, Zhang F, Su Q, Lin X, Wang W, Chen C, Ren H, Zheng S, Hui S, Qin S, Ni Y, Zhong J, Yang J. 4-Octyl itaconate attenuates renal tubular injury in db/db mice by activating Nrf2 and promoting PGC-1α-mediated mitochondrial biogenesis. Ren Fail 2024; 46:2403653. [PMID: 39291665 PMCID: PMC11411562 DOI: 10.1080/0886022x.2024.2403653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 07/11/2024] [Accepted: 09/08/2024] [Indexed: 09/19/2024] Open
Abstract
Objectives: The aim of this study was to investigate the mechanism of itaconate's potential effect in diabetic kidney disease. Methods: Renal immune responsive gene 1 (IRG1) levels were measured in db/db mice and streptozotocin (STZ) + high-fat diet (HFD)-induced diabetic mice. Irg1 knockout mice were generated. db/db mice were treated with 4-octyl itaconate (4-OI, 50 mg/kg), a derivative of itaconate, for 4 weeks. Renal function and morphological changes were investigated. Ultrastructural alterations were determined by transmission electron microscopy. Results: Renal IRG1 levels were reduced in two diabetic models. STZ+HFD-treated Irg1 knockout mice exhibited aggravated renal tubular injury and worsened renal function. Treatment with 4-OI lowered urinary albumin-to-creatinine ratio and blood urea nitrogen levels, and restored renal histological changes in db/db mice. It improved mitochondrial damage, increased expressions of peroxisome-proliferator-activated receptor γ coactivator-1α (PGC-1α) and mitochondrial transcription factor A (TFAM) in the renal cortex of db/db mice. These were confirmed in vitro; 4-OI improved high glucose-induced abnormal mitochondrial morphology and TFAM expression in HK-2 cells, effects that were inhibited by PGC-1α silencing. Moreover, 4-OI reduced the number of apoptotic cells in the renal cortex of db/db mice. Further study showed that 4-OI increased renal Nrf2 expression and decreased oxidative stress levels in db/db mice. In HK-2 cells, 4-OI decreased high glucose-induced mitochondrial ROS production, which was reversed by Nrf2 silencing. Nrf2 depletion also inhibited 4-OI-mediated regulation of PGC-1α, TFAM, and mitochondrial apoptotic protein expressions. Conclusions: 4-OI attenuates renal tubular injury in db/db mice by activating Nrf2 and promoting PGC-1α-mediated mitochondrial biogenesis.
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Affiliation(s)
- Muqing Shao
- Department of Endocrinology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jiayao Chen
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Fuwei Zhang
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Cardiology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qian Su
- Department of Endocrinology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaoqian Lin
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Weiwei Wang
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Cardiology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Caiyu Chen
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing, China
| | - Hongmei Ren
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing, China
| | - Shuo Zheng
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing, China
| | - Suocheng Hui
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Si Qin
- Department of Endocrinology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yinxing Ni
- Department of Endocrinology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jian Zhong
- Department of Endocrinology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jian Yang
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Kang H, Gu X, Cao S, Tong Z, Song N. Integrated multi-omics analyses reveal the pro-inflammatory and pro-fibrotic pulmonary macrophage subcluster in silicosis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 284:116899. [PMID: 39181076 DOI: 10.1016/j.ecoenv.2024.116899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 08/10/2024] [Accepted: 08/15/2024] [Indexed: 08/27/2024]
Abstract
BACKGROUND Silicosis is a lethal occupational disease caused by long-term exposure to respirable silica dust. Pulmonary macrophages play a crucial role in mediating the initiation of silicosis. However, the phenotypic and functional heterogeneities of pulmonary macrophages in silicosis have not been well-studied. METHODS The silicosis mouse model was established by intratracheal administration of silica suspension. Bronchoalveolar lavage fluids (BALFs) of mice were collected for the multiplex cytokine analysis. Single-cell RNA sequencing (scRNA-seq) and spatial transcriptomics were performed to reveal the heterogeneity and spatial localization of macrophages in the lung tissues. The formation of the fibrotic nodules was characterized by histology, hydroxyproline assay, and immunohistochemical staining, respectively. The expression of the pro-inflammatory or pro-fibrotic genes was investigated by quantitative polymerase chain reaction (qPCR). RESULTS We found that the level of pro-inflammatory cytokines and chemokines is significantly increased in the BALFs of silicosis mice. Apparent collagen deposition can also be observed in the silicotic lung tissues. By scRNA-seq, we have identified a subpopulation of Mmp12hi macrophages significantly expanding in the lung tissues of mice with silicosis. Spatial transcriptomics analysis further confirmed that the Mmp12hi macrophages are mainly enriched in silicosis nodules. Pseudotime trajectory showed that these Mmp12hi macrophages, highly expressing both pro-inflammatory and pro-fibrotic genes, are derived from Ly6c+ monocytes. Additionally, 4-octyl itaconate (4-OI) treatment, which can alleviate pulmonary fibrosis in silicosis mice, also reduces the enrichment of the Mmp12hi macrophages. Moreover, we found a subset of macrophages in BALFs derived from patients with silicosis exhibited similar characteristics of Mmp12hi macrophages in silicosis mice models. CONCLUSIONS Our study suggested that a group of Mmp12hi macrophages highly express both pro-inflammatory and pro-fibrotic factors in silicosis mice, and thus may contribute to the progression of fibrosis. The findings have proposed new insights for understanding the heterogeneity of lung macrophages in silicosis, suggesting that the subset of Mmp12hi macrophages may be a potential therapy target to further halt the progression of silicosis.
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Affiliation(s)
- Hanyujie Kang
- Department of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - Xueqing Gu
- Department of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - Siyu Cao
- Department of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - Zhaohui Tong
- Department of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China.
| | - Nan Song
- Department of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China; Medical Research Center, Beijing Institute of Respiratory Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China.
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Huang P, Wang X, Cao Y, Yang J, Yao R, Liang L, Cheng G, Yang L. Research progress on the use of Salvia miltiorrhiza Bunge extracts in the treatment of pulmonary diseases. Biomed Pharmacother 2024; 179:117282. [PMID: 39146764 DOI: 10.1016/j.biopha.2024.117282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 08/01/2024] [Accepted: 08/08/2024] [Indexed: 08/17/2024] Open
Abstract
Salvia miltiorrhiza Bunge extracts, known for their diverse biological activities, often have remarkable efficacy in treating pulmonary diseases overlooked due to their specific cardiovascular actions. With the recent outbreak of COVID-19, research into pulmonary-related diseases has garnered significant attention. Salvia miltiorrhiza Bunge extracts can be broadly categorized into lipophilic and hydrophilic components; however, a comprehensive summary of their mechanisms in treating pulmonary diseases is lacking. Therefore, this review aims to systematically summarize the therapeutic mechanisms of 10 major Salvia miltiorrhiza Bunge extracts in treating pulmonary fibrosis, lung cancer, acute lung injury, and chronic obstructive pulmonary disease, with the goal of identifying promising options for efficacious therapies.
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Affiliation(s)
- Peifeng Huang
- School of Integrative medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Xuezhen Wang
- School of Integrative medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Yingyi Cao
- New Cornerstone Science Laboratory, Tsinghua University-Peking University Joint Center for Life Sciences, School of Basic Medical Sciences, Tsinghua University, Beijing 100084, China
| | - Jiaming Yang
- Research Center for Infectious Diseases, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Rongmei Yao
- Research Center for Infectious Diseases, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Leiqin Liang
- Research Center for Infectious Diseases, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
| | - Gong Cheng
- New Cornerstone Science Laboratory, Tsinghua University-Peking University Joint Center for Life Sciences, School of Basic Medical Sciences, Tsinghua University, Beijing 100084, China; Institute of Infectious Diseases, Shenzhen Bay Laboratory, Shenzhen, Guangdong 518000, China.
| | - Long Yang
- School of Integrative medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China; Research Center for Infectious Diseases, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
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Zhang Y, Huang J, Li S, Jiang J, Sun J, Chen D, Pang Q, Wu Y. Pyrroloquinoline Quinone Alleviates Mitochondria Damage in Radiation-Induced Lung Injury in a MOTS-c-Dependent Manner. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:20944-20958. [PMID: 39259217 DOI: 10.1021/acs.jafc.4c03502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2024]
Abstract
Radiation-induced lung injury (RILI) is a prevalent complication of thoracic tumor radiotherapy and accidental radiation exposure. Pyrroloquinoline quinone (PQQ), a novel vitamin B, plays a crucial role in delaying aging, antioxidation, anti-inflammation, and antiapoptosis. This study aims to investigate the protective effect and mechanisms of PQQ against RILI. C57BL/6 mice were exposed to a 20 Gy dose of X-ray radiation on the entire thorax with or without daily oral administration of PQQ for 2 weeks. PQQ effectively mitigated radiation-induced lung tissue damage, inflammation, oxidative stress, and epithelial cell apoptosis. Additionally, PQQ significantly inhibited oxidative stress and mitochondrial damage in MLE-12 cells. Mechanistically, PQQ upregulated the mRNA and protein levels of MOTS-c in irradiated lung tissue and MLE-12 cells. Knockdown of MOTS-c by siRNA substantially attenuated the protective effects of PQQ on oxidative stress, inflammation, and apoptosis. In conclusion, PQQ alleviates RILI by preserving mitochondrial function through a MOTS-c-dependent mechanism, suggesting that PQQ may serve as a promising nutraceutical intervention against RILI.
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Affiliation(s)
- Yanli Zhang
- Department of Radiation Oncology, Affiliated Hospital of Jiangnan University, 1000 Hefeng Road, Wuxi 214122, China
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu, China
| | - Jianfeng Huang
- Department of Radiation Oncology, Affiliated Hospital of Jiangnan University, 1000 Hefeng Road, Wuxi 214122, China
| | - Shengpeng Li
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu, China
| | - Junlin Jiang
- Department of Radiation Oncology, Affiliated Hospital of Jiangnan University, 1000 Hefeng Road, Wuxi 214122, China
| | - Jiaojiao Sun
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu, China
| | - Dan Chen
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu, China
| | - Qingfeng Pang
- Department of Radiation Oncology, Affiliated Hospital of Jiangnan University, 1000 Hefeng Road, Wuxi 214122, China
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu, China
| | - Yaxian Wu
- Department of Radiation Oncology, Affiliated Hospital of Jiangnan University, 1000 Hefeng Road, Wuxi 214122, China
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu, China
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Wu Y, He S, Zhang Y, Li S, Liu R, Zhang Y, Jing Y, Chen D, Tong Y, Wang Z, Wang Q, Pang Q. Sophoricoside ameliorates methicillin-resistant Staphylococcus aureus-induced acute lung injury by inhibiting Bach1/Akt pathway. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 132:155846. [PMID: 38964155 DOI: 10.1016/j.phymed.2024.155846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 06/05/2024] [Accepted: 06/25/2024] [Indexed: 07/06/2024]
Abstract
BACKGROUND The lack of effective treatments for methicillin-resistant Staphylococcus aureus (MRSA) infection, which often leads to severe acute lung injury (ALI), poses a grave threat to human life. Sophoricoside (SOP), an isoflavone glycoside abundant in the fruit of traditional Chinese herbal Sophora japonica l., showed anti-inflammatory effects against atopic dermatitis, allergic inflammation, and lipopolysaccharide-induced ALI. However, its effect and underlying mechanism on MRSA-induced ALI remain unclear. PURPOSE The aim of this study is to assess the protective effect of SOP in MRSA-induced ALI and elucidate its underlying molecular mechanisms. METHODS In vivo experiments were conducted using wild-type mice to establish MRSA-induced ALI mouse model, and the effects of SOP on ALI were evaluated by hematoxylin-eosin staining, flow cytometry, quantitative real-time polymerase chain reaction, and several biochemical indicators. Adoptive transfer experiments and BTB and CNC homology 1 knockout (Bach1-/-) mice were also utilized in this study. In vitro studies employed murine macrophages RAW264.7 cells, primary bone marrow-derived macrophages (BMDMs), and primary lung macrophages to explore the underlying molecular mechanisms. RESULTS The administration of SOP ameliorated MRSA-induced ALI by improving pulmonary histological damages, reducing neutrophil infiltration, suppressing oxidative stress levels, and decreasing the expression of inflammatory cytokines. In isolation experiments with ALI mouse lung macrophages and macrophage adoptive transfer experiments, SOP prevented macrophage activation, thereby reducing the production of proinflammatory cytokines. In vitro experiments demonstrated that SOP decreased the expression of inflammatory mediators in lipoteichoic acid (LTA)-stimulated RAW264.7 cells, BMDMs, and primary lung macrophages. Additionally, SOP inhibited protein kinase B (Akt) phosphorylation and treatment with MK2206-a specific inhibitor of Akt-eliminated SOP's ability to suppress LTA-stimulated macrophage inflammation. Furthermore, stimulation with LTA or MRSA up-regulated Bach1 expression; however, deletion of Bach1 abolished the inhibitory effect of SOP on p-Akt activation as well as inflammation and ALI development. CONCLUSION This study provides the first evidence that SOP effectively mitigates MRSA-induced ALI via suppressing macrophage activation through the inhibition of Bach1/Akt pathway. These findings highlight the potential of SOP as a novel therapeutic agent for treating MRSA-induced ALI.
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Affiliation(s)
- Yaxian Wu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, Jiangsu province, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu province, PR China
| | - Shuai He
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, Jiangsu province, PR China
| | - Yaru Zhang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, Jiangsu province, PR China
| | - Shuaichao Li
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, Jiangsu province, PR China
| | - Ruyin Liu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, Jiangsu province, PR China
| | - Yanli Zhang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, Jiangsu province, PR China
| | - Yutong Jing
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, Jiangsu province, PR China
| | - Dan Chen
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, Jiangsu province, PR China
| | - Ying Tong
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, Jiangsu province, PR China
| | - Zhiqiang Wang
- Department of Cardiothoracic Surgery, Affiliated Hospital of Jiangnan University, Wuxi 214000, Jiangsu province, PR China
| | - Qianyun Wang
- Department of Thoracic Surgery, The First People's Hospital of Changzhou, Changzhou 213000, Jiangsu province, PR China.
| | - Qingfeng Pang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, Jiangsu province, PR China.
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Yu H, Zhu G, Qin Q, Wang X, Guo X, Gu W. Mesenchymal Stromal Cell Therapy Alleviates Ovalbumin-Induced Chronic Airway Remodeling by Suppressing M2 Macrophage Polarization. Inflammation 2024; 47:1298-1312. [PMID: 38316671 DOI: 10.1007/s10753-024-01977-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/15/2024] [Accepted: 01/16/2024] [Indexed: 02/07/2024]
Abstract
Chronic asthma is characterized by airway hyperresponsiveness, inflammation, and remodeling. Previous studies have shown that mesenchymal stromal/stem cells (MSCs) exert anti-inflammatory effects on asthma via regulation of the immune cells. However, the therapeutic mechanism of MSCs, especially the mechanism of airway remodeling in chronic asthma, remains to be elucidated. Here, we aimed to investigate the therapeutic effect of MSCs on airway remodeling in chronic asthma and explored the mechanisms by analyzing the polarization phenotype of macrophages in the lungs. We established a mouse model of chronic asthma induced by ovalbumin (OVA) and evaluated the effect of MSCs on airway remodeling. The data showed that MSCs treatment before the challenge exerted protective effects on OVA-induced chronic asthma, i.e., decreased the inflammatory cell infiltration, Th2 cytokine levels, subepithelial extracellular matrix deposition, and transforming growth factor β (TGF-β)/Smad signaling. Additionally, we found that MSCs treatment markedly suppressed macrophage M2 polarization in lung tissue. At the same time, MSCs treatment inhibited NF-κB p65 nuclear translocation, ER stress, and oxidative stress in the OVA-induced chronic allergic airway remodeling mice model. In conclusion, these results demonstrated that MSCs treatment prevents OVA-induced chronic airway remodeling by suppressing macrophage M2 polarization, which may be associated with the dual inhibition of ER stress and oxidative stress. This discovery may provide a new theoretical basis for the future clinical application of MSCs.
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Affiliation(s)
- Haiyang Yu
- Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, 1665 KongJiang Road, Shanghai, 200092, China
| | - Guiyin Zhu
- Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, 1665 KongJiang Road, Shanghai, 200092, China
| | - Qiangqiang Qin
- Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, 1665 KongJiang Road, Shanghai, 200092, China
| | - Xueting Wang
- Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, 1665 KongJiang Road, Shanghai, 200092, China
| | - Xuejun Guo
- Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, 1665 KongJiang Road, Shanghai, 200092, China.
| | - Wen Gu
- Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, 1665 KongJiang Road, Shanghai, 200092, China.
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Zhao N, Yi M, Zhang LJ, Zhang QX, Yang L. 4-Octyl Itaconate Attenuates Neuroinflammation in Experimental Autoimmune Encephalomyelitis Via Regulating Microglia. Inflammation 2024:10.1007/s10753-024-02050-1. [PMID: 38761250 DOI: 10.1007/s10753-024-02050-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 05/02/2024] [Accepted: 05/08/2024] [Indexed: 05/20/2024]
Abstract
Abnormal activation of microglia, the resident macrophages in the central nervous system, plays an important role in the pathogenesis of multiple sclerosis (MS). The immune responsive gene 1(IRG1)/itaconate axis is involved in regulating microglia-mediated neuroinflammation. 4-Octyl itaconate (4-OI), a derivative of itaconate, plays a crucial immunomodulatory role in macrophages. This study investigated the effects and mechanisms of action of 4-OI on experimental autoimmune encephalomyelitis (EAE) and inflammatory BV2 microglia. In an EAE mouse model, clinical evaluation was conducted during the disease course. Hematoxylin and eosin staining was performed to assess inflammatory infiltration and Luxol Fast Blue was used to visualize pathological damage. Quantitative real-time polymerase chain reaction, western blotting and immunofluorescence were used to evaluate inflammatory response and microglial function status in EAE mice. BV2 microglia were used to further investigate the effects and mechanisms of action of 4-OI in vitro. 4-OI significantly alleviated the clinical symptoms of EAE, the inflammatory infiltration, and demyelination; reduced the levels of inflammatory factors; and inhibited the classical activation of microglia in the spinal cord. 4-OI successfully suppressed the classical activation of BV2 microglia and decreased the levels of inflammatory factors by activating the Nrf2/HO-1 signaling pathway. Furthermore, 4-OI downregulated IRG1 expression in both EAE mice and inflammatory BV2 microglia. 4-OI attenuates the microglia-mediated neuroinflammation and has promising therapeutic effects in MS.
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Affiliation(s)
- Ning Zhao
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Ming Yi
- Department of The Key Laboratory for Human Disease Gene Study of Sichuan Province and the Department of Laboratory Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China
- Research Unit for Blindness Prevention of the Chinese Academy of Medical Sciences (2019RU026), Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, Sichuan, China
| | - Lin-Jie Zhang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Qiu-Xia Zhang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Li Yang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China.
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Zhang Y, Huang J, Zhang Y, Jiang F, Li S, He S, Sun J, Chen D, Tong Y, Pang Q, Wu Y. The Mitochondrial-Derived Peptide MOTS-c Alleviates Radiation Pneumonitis via an Nrf2-Dependent Mechanism. Antioxidants (Basel) 2024; 13:613. [PMID: 38790718 PMCID: PMC11117534 DOI: 10.3390/antiox13050613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 04/30/2024] [Accepted: 05/06/2024] [Indexed: 05/26/2024] Open
Abstract
Radiation pneumonitis (RP) is a prevalent and fatal complication of thoracic radiotherapy due to the lack of effective treatment options. RP primarily arises from mitochondrial injury in lung epithelial cells. The mitochondrial-derived peptide MOTS-c has demonstrated protective effects against various diseases by mitigating mitochondrial injury. C57BL/6 mice were exposed to 20 Gy of lung irradiation (IR) and received daily intraperitoneal injections of MOTS-c for 2 weeks. MOTS-c significantly ameliorated lung tissue damage, inflammation, and oxidative stress caused by radiation. Meanwhile, MOTS-c reversed the apoptosis and mitochondrial damage of alveolar epithelial cells in RP mice. Furthermore, MOTS-c significantly inhibited oxidative stress and mitochondrial damage in MLE-12 cells and primary mouse lung epithelial cells. Mechanistically, MOTS-c increased the nuclear factor erythroid 2-related factor (Nrf2) level and promoted its nuclear translocation. Notably, Nrf2 deficiency abolished the protective function of MOTS-c in mice with RP. In conclusion, MOTS-c alleviates RP by protecting mitochondrial function through an Nrf2-dependent mechanism, indicating that MOTS-c may be a novel potential protective agent against RP.
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Affiliation(s)
- Yanli Zhang
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (Y.Z.); (Y.Z.); (F.J.); (S.L.); (S.H.); (J.S.); (D.C.); (Y.T.); (Q.P.)
| | - Jianfeng Huang
- Affiliated Hospital of Jiangnan University, 1000 Hefeng Road, Wuxi 214000, China;
| | - Yaru Zhang
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (Y.Z.); (Y.Z.); (F.J.); (S.L.); (S.H.); (J.S.); (D.C.); (Y.T.); (Q.P.)
| | - Fengjuan Jiang
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (Y.Z.); (Y.Z.); (F.J.); (S.L.); (S.H.); (J.S.); (D.C.); (Y.T.); (Q.P.)
| | - Shengpeng Li
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (Y.Z.); (Y.Z.); (F.J.); (S.L.); (S.H.); (J.S.); (D.C.); (Y.T.); (Q.P.)
| | - Shuai He
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (Y.Z.); (Y.Z.); (F.J.); (S.L.); (S.H.); (J.S.); (D.C.); (Y.T.); (Q.P.)
| | - Jiaojiao Sun
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (Y.Z.); (Y.Z.); (F.J.); (S.L.); (S.H.); (J.S.); (D.C.); (Y.T.); (Q.P.)
| | - Dan Chen
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (Y.Z.); (Y.Z.); (F.J.); (S.L.); (S.H.); (J.S.); (D.C.); (Y.T.); (Q.P.)
| | - Ying Tong
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (Y.Z.); (Y.Z.); (F.J.); (S.L.); (S.H.); (J.S.); (D.C.); (Y.T.); (Q.P.)
| | - Qingfeng Pang
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (Y.Z.); (Y.Z.); (F.J.); (S.L.); (S.H.); (J.S.); (D.C.); (Y.T.); (Q.P.)
- Affiliated Hospital of Jiangnan University, 1000 Hefeng Road, Wuxi 214000, China;
| | - Yaxian Wu
- Wuxi School of Medicine, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (Y.Z.); (Y.Z.); (F.J.); (S.L.); (S.H.); (J.S.); (D.C.); (Y.T.); (Q.P.)
- Affiliated Hospital of Jiangnan University, 1000 Hefeng Road, Wuxi 214000, China;
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
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You M, Jiang Q, Huang H, Ma F, Zhou X. 4-Octyl itaconate inhibits inflammation to attenuate psoriasis as an agonist of oxeiptosis. Int Immunopharmacol 2023; 124:110915. [PMID: 37741130 DOI: 10.1016/j.intimp.2023.110915] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/05/2023] [Accepted: 09/06/2023] [Indexed: 09/25/2023]
Abstract
Psoriasis is a highly prevalent chronic disease associated with a substantial social and economic burden. Oxeiptosis is a programmed cell death that occurs when cells are in a state of high oxidative stress, which has a potent anti-inflammatory effect. However, there is still no research on oxeiptosis in psoriasis, and the agonists or antagonists of oxeiptosis remain an unclear field. Here, we found that oxeiptosis of keratinocytes was inhibited in psoriasis lesions. KEAP1, as the upstream molecular component of oxeiptosis, is highly expressed in psoriasis lesions. Knockdown of KEAP1 in HaCaT cells caused oxeiptosis in the condition of M5 cocktail stimulation. Next, we found that the cell-permeable derivative of itaconate, 4-octylitaconate (OI) promoted oxeiptosis of keratinocytes by inhibiting KEAP1 and then activating PGAM5 which are two upstream molecular components of oxeiptosis. At the same time, OI can reduce the expression of inflammatory cytokines induced by M5 cocktail stimulation in vitro. Similarly, we found that OI can alleviate IMQ-induced psoriatic lesions in mice and downregulate the levels of inflammatory cytokines in psoriatic lesions. In summary, our findings suggest that oxeiptosis of keratinocytes was inhibited in psoriasis and OI can significantly inhibit inflammation and alleviate psoriasis as an agonist of oxeiptosis, indicating that oxeiptosis may be involved in regulating the progression of psoriasis, which may provide new therapeutic targets for psoriasis treatment.
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Affiliation(s)
- Mengshu You
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Qian Jiang
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Huining Huang
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha 410008, China; Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Fangyu Ma
- Department of Health Management Center, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China.
| | - Xingchen Zhou
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China.
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