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Caballero-Sánchez N, Alonso-Alonso S, Nagy L. Regenerative inflammation: When immune cells help to re-build tissues. FEBS J 2024; 291:1597-1614. [PMID: 36440547 PMCID: PMC10225019 DOI: 10.1111/febs.16693] [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: 08/29/2022] [Revised: 10/29/2022] [Accepted: 11/18/2022] [Indexed: 11/29/2022]
Abstract
Inflammation is an essential immune response critical for responding to infection, injury and maintenance of tissue homeostasis. Upon injury, regenerative inflammation promotes tissue repair by a timed and coordinated infiltration of diverse cell types and the secretion of growth factors, cytokines and lipids mediators. Remarkably, throughout evolution as well as mammalian development, this type of physiological inflammation is highly associated with immunosuppression. For instance, regenerative inflammation is the consequence of an in situ macrophage polarization resulting in a transition from pro-inflammatory to anti-inflammatory/pro-regenerative response. Immune cells are the first responders upon injury, infiltrating the damaged tissue and initiating a pro-inflammatory response depleting cell debris and necrotic cells. After phagocytosis, macrophages undergo multiple coordinated metabolic and transcriptional changes allowing the transition and dictating the initiation of the regenerative phase. Differences between a highly efficient, complete ad integrum tissue repair, such as, acute skeletal muscle injury, and insufficient regenerative inflammation, as the one developing in Duchenne Muscular Dystrophy (DMD), highlight the importance of a coordinated response orchestrated by immune cells. During regenerative inflammation, these cells interact with others and alter the niche, affecting the character of inflammation itself and, therefore, the progression of tissue repair. Comparing acute muscle injury and chronic inflammation in DMD, we review how the same cells and molecules in different numbers, concentration and timing contribute to very different outcomes. Thus, it is important to understand and identify the distinct functions and secreted molecules of macrophages, and potentially other immune cells, during tissue repair, and the contributors to the macrophage switch leveraging this knowledge in treating diseases.
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Affiliation(s)
- Noemí Caballero-Sánchez
- Doctoral School of Molecular Cell and Immunobiology, Faculty of Medicine, University of Debrecen, Hungary
- Department of Biochemistry and Molecular Biology, Nuclear Receptor Research Laboratory, Faculty of Medicine, University of Debrecen, Hungary
| | - Sergio Alonso-Alonso
- Instituto Oftalmológico Fernández-Vega, Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Laszlo Nagy
- Department of Biochemistry and Molecular Biology, Nuclear Receptor Research Laboratory, Faculty of Medicine, University of Debrecen, Hungary
- Departments Medicine and Biological Chemistry, Johns Hopkins University School of Medicine, and Institute for Fundamental Biomedical Research, Johns Hopkins All Children's Hospital, St Petersburg, Florida, USA
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Zhang J, Xu J, Li S, Chen W, Wu Y. Electroacupuncture Relieves HuR/KLF9-Mediated Inflammation to Enhance Neurological Repair after Spinal Cord Injury. eNeuro 2023; 10:ENEURO.0190-23.2023. [PMID: 37940560 PMCID: PMC10668228 DOI: 10.1523/eneuro.0190-23.2023] [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: 06/01/2023] [Revised: 10/25/2023] [Accepted: 10/29/2023] [Indexed: 11/10/2023] Open
Abstract
Electroacupuncture (EA) is widely applied in clinical therapy for spinal cord injury (SCI). However, the associated molecular mechanism has yet to be elucidated. The current study aimed to investigate the underlying mechanism of EA in neurologic repair after SCI. First, we investigated the role of EA in the neurologic repair of the SCI rat model. The expression levels of human antigen R (HuR) and Krüppel-like factor 9 (KLF9) in spinal cord tissues were quantified after treatment. Second, we conducted bioinformatics analysis, RNA pull-down assays, RNA immunoprecipitation, and luciferase reporter gene assay to verify the binding of HuR and KLF9 mRNA for mRNA stability. Last, HuR inhibitor CMLD-2 was used to verify the enhanced effect of EA on neurologic repair after SCI via the HuR/KLF9 axis. Our data provided convincing evidence that EA facilitated the recovery of neuronal function in SCI rats by reducing apoptosis and inflammation of neurons. We found that EA significantly diminished the SCI-mediated upregulation of HuR, and HuR could bind to the 3' untranslated region of KLF9 mRNA to protect its decay. In addition, a series of in vivo experiments confirmed that CMLD-2 administration increased EA-mediated pain thresholds and motor function in SCI rats. Collectively, the present study showed that EA improved pain thresholds and motor function in SCI rats via impairment of HuR-mediated KLF9 mRNA stabilization, thus providing a better understanding of the regulatory mechanisms regarding EA-mediated neurologic repair after SCI.
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Affiliation(s)
- Junfeng Zhang
- Department of Acupuncture, Tuina and Traumatology, The Sixth People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200233, People's Republic of China
| | - Jingjie Xu
- Department of Acupuncture, Tuina and Traumatology, The Sixth People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200233, People's Republic of China
| | - Shisheng Li
- Department of Acupuncture, Tuina and Traumatology, The Sixth People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200233, People's Republic of China
| | - Wei Chen
- Department of Acupuncture, Tuina and Traumatology, The Sixth People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200233, People's Republic of China
| | - Yaochi Wu
- Department of Acupuncture, Tuina and Traumatology, The Sixth People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200233, People's Republic of China
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Luo X, Zhang H, Cao X, Yang D, Yan Y, Lu J, Wang X, Wang H. Endurance Exercise-Induced Fgf21 Promotes Skeletal Muscle Fiber Conversion through TGF-β1 and p38 MAPK Signaling Pathway. Int J Mol Sci 2023; 24:11401. [PMID: 37511159 PMCID: PMC10379449 DOI: 10.3390/ijms241411401] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/07/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
Fgf21 has been identified as playing a regulatory role in muscle growth and function. Although the mechanisms through which endurance training regulates skeletal muscle have been widely studied, the contribution of Fgf21 remains poorly understood. Here, muscle size and function were measured, and markers of fiber type were evaluated using immunohistochemistry, immunoblots, or qPCR in endurance-exercise-trained wild-type and Fgf21 KO mice. We also investigated Fgf21-induced fiber conversion in C2C12 cells, which were incubated with lentivirus and/or pathway inhibitors. We found that endurance exercise training enhanced the Fgf21 levels of liver and GAS muscle and exercise capacity and decreased the distribution of skeletal muscle fiber size, and fast-twitch fibers were observed converting to slow-twitch fibers in the GAS muscle of mice. Fgf21 promoted the markers of fiber-type transition and eMyHC-positive myotubes by inhibiting the TGF-β1 signaling axis and activating the p38 MAPK signaling pathway without apparent crosstalk. Our findings suggest that the transformation and function of skeletal muscle fiber types in response to endurance training could be mediated by Fgf21 and its downstream signaling pathways. Our results illuminate the mechanisms of Fgf21 in endurance-exercise-induced fiber-type conversion and suggest a potential use of Fgf21 in improving muscle health and combating fatigue.
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Affiliation(s)
- Xiaomao Luo
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong 030801, China
| | - Huiling Zhang
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong 030801, China
| | - Xiaorui Cao
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong 030801, China
| | - Ding Yang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Yi Yan
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong 030801, China
| | - Jiayin Lu
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong 030801, China
| | - Xiaonan Wang
- Renal Division, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Haidong Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong 030801, China
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Chen S, Wang L, Yuan Y, Wen Y, Shu S. Electroacupuncture regulates microglia polarization via lncRNA-mediated hippo pathway after ischemic stroke. Biotechnol Genet Eng Rev 2023:1-17. [PMID: 36760060 DOI: 10.1080/02648725.2023.2177046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 01/30/2023] [Indexed: 02/11/2023]
Abstract
Microglia polarization and microglia-mediated inflammation play a crucial role in the development of ischaemic brain injury. Electroacupuncture (EA) has the function of anti-inflammatory, which has been thoroughly validated and utilized to treat ischemic brain damage. The fundamental mechanism by which EA alleviates ischemic brain damage by decreasing microglia polarization and microglia-mediated inflammation, however, remains unknown. In the current study, the activation of microglia and inflammatory cytokines was analyzed to confirm the anti-inflammatory function of EA in middle cerebral artery occlusion (MCAO) rats. Whole-transcriptome sequencing was used to examine the differentially expressed lncRNAs in the control, MCAO, and MCAO +EA groups. Our findings demonstrated that EA treatment reduced microglia activation and inflammatory cytokine production. In addition, there are 44 lncRNAs were found significantly different in three groups, and the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway of the predicted targets of these lncRNAs suggested that the Hippo pathway may contribute to the development of ischaemic brain injury and to the anti-inflammatory function of EA. Moreover, our data showed that lncRNA TCONS_00022826 (Lnc826) was upregulated in MCAO group, whereas blocked by EA treatment. Furthermore, in vitro OGD cell model data showed that Lnc826 promoted M1 polarization of microglia by regulating the Hippo pathway. Our data suggested that regulating microglia polarization via Lnc826-mediated hippo pathway is a possible mechanism of the EA treatment on ischemic brain injury.
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Affiliation(s)
- Shenxu Chen
- Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Department of TCM, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Linmei Wang
- Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ying Yuan
- Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Department of Acupuncture and Tuina, Changhai Hospital, Shanghai China
| | - Yunfan Wen
- Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shi Shu
- Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Chen SC, Jiang T, Liu QY, Liu ZT, Su YF, Su HT. Hsa_circ_0001485 promoted osteogenic differentiation by targeting BMPR2 to activate the TGFβ-BMP pathway. Stem Cell Res Ther 2022; 13:453. [PMID: 36064455 PMCID: PMC9446709 DOI: 10.1186/s13287-022-03150-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 08/21/2022] [Indexed: 12/02/2022] Open
Abstract
Background Circular RNAs (circRNAs) are a new type of stable noncoding RNA and have been proven to play a crucial role in osteoporosis. This study explored the role and mechanism of hsa_circ_0001485 in osteogenic differentiation. Methods Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis and Gene Ontology (GO) enrichment analysis were performed according to the previous sequencing data in human bone marrow mesenchymal stem cells (BMSC) before and after the induction of osteogenic differentiation on the differentially expressed circRNAs, to screen out signaling pathways associated with osteogenic differentiation. The hFOB 1.19 cells were used to verify the function and mechanism of specific circRNAs in osteogenic differentiation. Additionally, small interfering fragments and overexpression plasmids were used to determine the role of specific circRNAs during osteogenic differentiation. Furthermore, pull-down experiments and mass spectrometry were performed to determine the proteins that bind to specific circRNAs. Results The KEGG and GO enrichment analyses showed that the TGFβ-BMP signaling pathway was related to the osteogenic differentiation process, and four circRNAs were associated with the pathway. The quantitative polymerase chain reaction analysis revealed that hsa_circ_0001485 expression was increased during the osteogenic differentiation process of BMSCs. Knockdown of hsa_circ_0001485 suppressed the activity of the alkaline phosphatase enzyme and the expression of RUNX2, osteopontin, and osteocalcin in the osteogenic hFOB 1.19 cells, whereas overexpression of hsa_circ_0001485 promoted their expression. Additionally, we found that hsa_circ_0001485 and BMPR2 targeted binding to activate the TGFβ-BMP signaling pathway and promoted osteogenic differentiation through mass spectrometry analysis. Conclusion This study demonstrates that hsa_circ_0001485 is highly expressed in the osteogenic hFOB 1.19 cells, which activate the TGFβ-BMP pathway through targeted binding of BMPR2, and plays a positive role in regulating osteogenic differentiation.
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Affiliation(s)
- Shan-Chuang Chen
- Department of Orthopaedics, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, No. 55 Inner Ring West Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, Guangdong, China
| | - Tao Jiang
- Department of Orthopaedics, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, No. 55 Inner Ring West Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, Guangdong, China.
| | - Qi-Yu Liu
- Department of Orthopaedics, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, No. 55 Inner Ring West Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, Guangdong, China
| | - Zi-Tao Liu
- Department of Orthopaedics, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, No. 55 Inner Ring West Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, Guangdong, China
| | - Yu-Fei Su
- Department of Rehabilitation and Recovery, Albury Wodonga Health, Albury, NSW, 2640, Australia
| | - Hai-Tao Su
- Department of Orthopaedics, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, No. 55 Inner Ring West Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, Guangdong, China
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Chen Y, Luo Z, Lin J, Qi B, Sun Y, Li F, Guo C, Lin W, Kang X, He X, Wang Q, Chen S, Chen J. Exploring the Potential Mechanisms of Melilotus officinalis (L.) Pall. in Chronic Muscle Repair Patterns Using Single Cell Receptor-Ligand Marker Analysis and Molecular Dynamics Simulations. DISEASE MARKERS 2022; 2022:9082576. [PMID: 35692879 PMCID: PMC9177293 DOI: 10.1155/2022/9082576] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/28/2022] [Accepted: 04/26/2022] [Indexed: 02/07/2023]
Abstract
Information regarding the function of Melilotus officinalis (L.) Pall. in skeletal muscles is still unknown. In this study, we explored the possible regulatory targets of M. (L.) Pall. that affects the repair patterns in chronic muscle injury. We analyzed the potential target genes and chemical composition of M. (L.) Pall. and constructed a "drug-component-disease target genes" network analysis. Five active ingredients and 87 corresponding targets were obtained. Muscle-tendon junction (MTJ) cells were used to perform receptor-ligand marker analysis using the CellphoneDB algorithm. Targets of M. (L.) Pall. were screened further for the cellular ligand-receptor protein action on MTJs. Enrichment analysis suggests that those protein-associated ligand receptors may be associated with a range of intercellular signaling pathways. Molecular docking validation was then performed. Five proteins (CCL2, VEGFA, MMP2, MET, and EGFR) may be regulated by the active ingredient luteolin and scoparone. Finally, molecular dynamics simulations revealed that luteolin can stably target binding to MMP2. M. (L.) Pall. influences skeletal muscle repair patterns by affecting the fibroblast interactions in the muscle-tendon junctions through the active ingredients luteolin and scoparone.
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Affiliation(s)
- Yisheng Chen
- 1Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Zhiwen Luo
- 1Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Jinrong Lin
- 1Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Beijie Qi
- 1Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Yaying Sun
- 1Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Fangqi Li
- 1Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Chenyang Guo
- 2Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, China
| | - Weiwei Lin
- 3Department of Neurosurgery, Second Affiliated Hospital of Zhejiang University School of Medicine, Zhejiang University, 88 Jiefang Road, Hangzhou, 310009 Zhejiang, China
| | - Xueran Kang
- 4Shanghai Jiao Tong University, Shanghai 200080, China
| | - Xinyi He
- 5State Key Laboratory of Genetics Engineering, Collaborative Innovation Center for Genetics and Development, School Life Sciences and Human Phenome Institute, Fudan University, Shanghai, China
| | - Qian Wang
- 6Postdoctoral Workstation, Department of Central Laboratory, The Affiliated Taian City Central Hospital of Qingdao University, Taian 271000, China
| | - Shiyi Chen
- 1Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Jiwu Chen
- 2Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai 200080, China
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