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Zi X, Su R, Su R, Wang H, Li B, Gao C, Li X, Wang C. Elevated serum IL-2 and Th17/Treg imbalance are associated with gout. Clin Exp Med 2024; 24:9. [PMID: 38240927 PMCID: PMC10799120 DOI: 10.1007/s10238-023-01253-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 12/18/2023] [Indexed: 01/22/2024]
Abstract
Gout is considered an auto-inflammatory disorder, and the immunological drivers have not been fully unraveled. This study compared the peripheral lymphocyte and CD4+T cell subsets, and cytokines in gout and healthy controls (HCs) to explore the contributions of T helper 17 (Th17) cells, T regulatory (Treg) cells and cytokines to the pathogenesis of gout. We enrolled 126 gout patients (53 early-onset gout with age of first presentation < 40 years, and 73 late-onset gout with age of first presentation ≥ 40 years) and 77 HCs. Percentage and absolute numbers of peripheral lymphocyte and CD4+T cell subpopulations in each group were detected by flow cytometry. The serum cytokine levels were determined by flow cytometric bead array. For circulating CD4+T cell subsets, Th17/Treg ratio was significantly higher in early-onset gout, late-onset gout and gout without tophus than HCs; Th17 cells were significantly elevated in early-onset gout and gout without tophus, while the percentage of Treg cells was significantly decreased in early-onset and late-onset gout. Additionally, gout patients had significantly higher cytokines levels (including IL-2, IL-4, IL-6, IL-10, IL-17, IFN-γ, and TNF-α) than HCs; IL-2 levels were positively correlated with Treg cells and negatively correlated with ESR. ROC analysis showed that disease duration, CRP and fibrinogen, had moderate predictive performances for tophus in gout (the AUCs were 0.753, 0.703 and 0.701, respectively). Our study suggests that early-onset and late-onset gout differ in Th17/Treg imbalance, which in early-onset gout is due to elevated Th17 cells and in late-onset gout is due to decreased Treg cells. And increased serum cytokine levels, especially IL-2, may play an essential role in that. Restoring Th17/Treg balance may be a crucial way to improve the prognosis of gout patients.
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Affiliation(s)
- Xiaoyu Zi
- Department of Rheumatology, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Key Laboratory of Immunomicroecology, Taiyuan, Shanxi, China
| | - Ronghui Su
- Department of Rheumatology, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Key Laboratory of Immunomicroecology, Taiyuan, Shanxi, China
| | - Rui Su
- Department of Rheumatology, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Key Laboratory of Immunomicroecology, Taiyuan, Shanxi, China
| | - Hui Wang
- Department of Rheumatology, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Key Laboratory of Immunomicroecology, Taiyuan, Shanxi, China
| | - Baochen Li
- Department of Rheumatology, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Key Laboratory of Immunomicroecology, Taiyuan, Shanxi, China
| | - Chong Gao
- Pathology, Joint Program in Transfusion Medicine, Brigham and Women's Hospital/Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Xiaofeng Li
- Department of Rheumatology, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi Key Laboratory of Immunomicroecology, Taiyuan, Shanxi, China
| | - Caihong Wang
- Department of Rheumatology, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China.
- Shanxi Key Laboratory of Immunomicroecology, Taiyuan, Shanxi, China.
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Dong Q, Xue T, Yan H, Liu F, Liu R, Zhang K, Chong Y, Du J, Zhang H. Radiotherapy combined with nano-biomaterials for cancer radio-immunotherapy. J Nanobiotechnology 2023; 21:395. [PMID: 37899463 PMCID: PMC10614396 DOI: 10.1186/s12951-023-02152-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 10/09/2023] [Indexed: 10/31/2023] Open
Abstract
Radiotherapy (RT) plays an important role in tumor therapy due to its noninvasiveness and wide adaptation. In recent years, radiation therapy has been discovered to induce an anti-tumor immune response, which arouses widespread concern among scientists and clinicians. In this review, we highlight recent advances in the applications of nano-biomaterials for radiotherapy-activated immunotherapy. We first discuss the combination of different radiosensitizing nano-biomaterials and immune checkpoint inhibitors to enhance tumor immune response and improve radiotherapy efficacy. Subsequently, various nano-biomaterials-enabled tumor oxygenation strategies are introduced to alleviate the hypoxic tumor environment and amplify the immunomodulatory effect. With the aid of nano-vaccines and adjuvants, radiotherapy refreshes the host's immune system. Additionally, ionizing radiation responsive nano-biomaterials raise innate immunity-mediated anti-tumor immunity. At last, we summarize the rapid development of immune modulatable nano-biomaterials and discuss the key challenge in the development of nano-biomaterials for tumor radio-immunotherapy. Understanding the nano-biomaterials-assisted radio-immunotherapy will maximize the benefits of clinical radiotherapy and immunotherapy and facilitate the development of new combinational therapy modality.
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Affiliation(s)
- Qingrong Dong
- Department of Medical Imaging, First Hospital of Shanxi Medical University, Intelligent Imaging Big Data and Functional Nano-Imaging Engineering Research Center of Shanxi Province, Taiyuan, 030001, People's Republic of China
| | - Tingyu Xue
- Department of Medical Imaging, First Hospital of Shanxi Medical University, Intelligent Imaging Big Data and Functional Nano-Imaging Engineering Research Center of Shanxi Province, Taiyuan, 030001, People's Republic of China
| | - Haili Yan
- Department of Medical Imaging, First Hospital of Shanxi Medical University, Intelligent Imaging Big Data and Functional Nano-Imaging Engineering Research Center of Shanxi Province, Taiyuan, 030001, People's Republic of China
| | - Fang Liu
- College of Pharmacy, Shanxi Medical University, Jinzhong, 030619, People's Republic of China
| | - Ruixue Liu
- Department of Medical Imaging, First Hospital of Shanxi Medical University, Intelligent Imaging Big Data and Functional Nano-Imaging Engineering Research Center of Shanxi Province, Taiyuan, 030001, People's Republic of China
| | - Kun Zhang
- College of Pharmacy, Shanxi Medical University, Jinzhong, 030619, People's Republic of China
| | - Yu Chong
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences (RAD-X) Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, 215123, People's Republic of China.
| | - Jiangfeng Du
- Department of Medical Imaging, First Hospital of Shanxi Medical University, Intelligent Imaging Big Data and Functional Nano-Imaging Engineering Research Center of Shanxi Province, Taiyuan, 030001, People's Republic of China.
- College of Pharmacy, Shanxi Medical University, Jinzhong, 030619, People's Republic of China.
- Collaborative Innovation Center for Molecular Imaging of Precision Medicine, Shanxi Medical University, Taiyuan, 030001, People's Republic of China.
| | - Hui Zhang
- Department of Medical Imaging, First Hospital of Shanxi Medical University, Intelligent Imaging Big Data and Functional Nano-Imaging Engineering Research Center of Shanxi Province, Taiyuan, 030001, People's Republic of China.
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Zhang Z, Huo J, Ji X, Wei L, Zhang J. GREM1, LRPPRC and SLC39A4 as potential biomarkers of intervertebral disc degeneration: a bioinformatics analysis based on multiple microarray and single-cell sequencing data. BMC Musculoskelet Disord 2023; 24:729. [PMID: 37700277 PMCID: PMC10498557 DOI: 10.1186/s12891-023-06854-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 09/05/2023] [Indexed: 09/14/2023] Open
Abstract
BACKGROUND Low back pain (LBP) has drawn much widespread attention and is a major global health concern. In this field, intervertebral disc degeneration (IVDD) is frequently the focus of classic studies. However, the mechanistic foundation of IVDD is unclear and has led to conflicting outcomes. METHODS Gene expression profiles (GSE34095, GSE147383) of IVDD patients alongside control groups were analyzed to identify differentially expressed genes (DEGs) in the GEO database. GSE23130 and GSE70362 were applied to validate the yielded key genes from DEGs by means of a best subset selection regression. Four machine-learning models were established to assess their predictive ability. Single-sample gene set enrichment analysis (ssGSEA) was used to profile the correlation between overall immune infiltration levels with Thompson grades and key genes. The upstream targeting miRNAs of key genes (GSE63492) were also analyzed. A single-cell transcriptome sequencing data (GSE160756) was used to define several cell clusters of nucleus pulposus (NP), annulus fibrosus (AF), and cartilaginous endplate (CEP) of human intervertebral discs and the distribution of key genes in different cell clusters was yielded. RESULTS By developing appropriate p-values and logFC values, a total of 6 DEGs was obtained. 3 key genes (LRPPRC, GREM1, and SLC39A4) were validated by an externally validated predictive modeling method. The ssGSEA results indicated that key genes were correlated with the infiltration abundance of multiple immune cells, such as dendritic cells and macrophages. Accordingly, these 4 key miRNAs (miR-103a-3p, miR-484, miR-665, miR-107) were identified as upstream regulators targeting key genes using the miRNet database and external GEO datasets. Finally, the spatial distribution of key genes in AF, CEP, and NP was plotted. Pseudo-time series and GSEA analysis indicated that the expression level of GREM1 and the differentiation trajectory of NP chondrocytes are generally consistent. GREM1 may mainly exacerbate the degeneration of NP cells in IVDD. CONCLUSIONS Our study gives a novel perspective for identifying reliable and effective gene therapy targets in IVDD.
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Affiliation(s)
- ZhaoLiang Zhang
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, 030032, China
| | - JianZhong Huo
- Taiyuan Central Hospital, Ninth Hospital of Shanxi Medical University, Southern Fendong Road 256, Taiyuan, ShanXi, 030009, China.
| | - XingHua Ji
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, 030032, China
| | - LinDong Wei
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, 030032, China
| | - Jinfeng Zhang
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, 030032, China
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Cheng L, Liu L, Su R, Yan H, Zi X, Gao C, Li X, Wang C. The decreased of peripheral blood natural killer cell is associated with serum IL-2 level in the renal tubular acidosis in patients with primary sjogren's syndrome. BMC Immunol 2023; 24:17. [PMID: 37391717 PMCID: PMC10314557 DOI: 10.1186/s12865-023-00550-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 06/19/2023] [Indexed: 07/02/2023] Open
Abstract
BACKGROUND Primary Sjogren's Syndrome (pSS) is a lymphoproliferative disease with autoimmune characteristics, which is characterized by lymphocyte infiltration of exocrine glands and involvement and dysfunction of extraglandular organs. Renal tubular acidosis (RTA) is a common renal involvement in pSS. This study investigated the phenotypic characteristics of peripheral blood lymphocyte subsets and cytokines in pSS patients complicated with RTA (pSS-RTA). METHOD This retrospective study included 25 pSS patients complicated with RTA and 54 pSS patients without RTA (pSS-no-RTA). To examine the level of peripheral lymphocytes subsets, flow cytometry analysis was used. The level of serum cytokines were detected by flow cytometry bead array(CBA). The influencing factors related to the occurrence of pSS-RTA were identified through logistic regression analyze. RESULTS The absolute number of CD4 + T cells and Th2 cells in peripheral blood were decreased in pSS-RTA patients than pSS-no-RTA patients. Moreover, the absolute number of NK cells and Treg cells were also decreased in pSS-RTA patients than pSS-no-RTA. The level of serum IL-2 was higher in pSS-RTA patients than pSS-no-RTA patients, and is negatively correlated with the number of NK cells, the number and percentage of Th17 cells, and Th17/Treg. Serum IL-2 level is also correlated with various cytokines. Multivariate logistic analysis proved that elevated ESR and ALP were risk factors for pSS complicated with RTA, while Treg was a protective factor. CONCLUSION The increase of serum IL-2 level and the decrease of peripheral blood NK cells and Treg cells may be the immune mechanism of the development of pSS-RTA disease.
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Affiliation(s)
- Liyun Cheng
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Lu Liu
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Ronghui Su
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Huanhuan Yan
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xiaoyu Zi
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Chong Gao
- Pathology, Joint Program in Transfusion Medicine, Children's Hospital, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Xiaofeng Li
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Caihong Wang
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China.
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Huo R, Guo Q, Hu J, Li N, Gao R, Mi L, Zhang Z, Liu H, Guo Z, Zhao H, Zhang L, Xu K. Therapeutic Potential of Janus Kinase Inhibitors for the Management of Interstitial Lung Disease. Drug Des Devel Ther 2022; 16:991-998. [PMID: 35400994 PMCID: PMC8985822 DOI: 10.2147/dddt.s353494] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 03/17/2022] [Indexed: 11/23/2022] Open
Abstract
Interstitial lung disease (ILD) refers to a heterogeneous group of diseases characterized by lung fibroblast proliferation, interstitial inflammation, and fibrosis-induced lung damage. The Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway is known to be activated by pro-fibrotic/pro-inflammatory cytokines such as IL-6 and IL-13, whose levels are elevated in ILD. The overexpression of growth factors such as transforming growth factor β1 in ILD activates the JAK/STAT pathway through classical or non-classical pathways, promotes macrophage activation, increases the release of pro-inflammatory and pro-fibrosis factors, and facilitates fibroblast differentiation into myofibroblasts. These findings implicate that the JAK/STAT pathway plays an important role in the course of ILD. Recent evidence also suggests that JAK inhibition alleviates excessive inflammation and pulmonary fibrosis. Accordingly, the JAK inhibitors may serve as promising drugs for the treatment of JAK/STAT-induced ILD.
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Affiliation(s)
- Rongxiu Huo
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences; Tongji Shanxi Hospital, Department of Rheumatology and Immunology, Taiyuan, 030032, People’s Republic of China
| | - Qianyu Guo
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences; Tongji Shanxi Hospital, Department of Rheumatology and Immunology, Taiyuan, 030032, People’s Republic of China
| | - Junping Hu
- Department of Immunology, Shanxi Medical University, Taiyuan, 030000, People’s Republic of China
| | - Na Li
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences; Tongji Shanxi Hospital, Department of Rheumatology and Immunology, Taiyuan, 030032, People’s Republic of China
| | - Rui Gao
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences; Tongji Shanxi Hospital, Department of Rheumatology and Immunology, Taiyuan, 030032, People’s Republic of China
| | - Liangyu Mi
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences; Tongji Shanxi Hospital, Department of Rheumatology and Immunology, Taiyuan, 030032, People’s Republic of China
| | - Zhaoliang Zhang
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences; Tongji Shanxi Hospital, Department of Rheumatology and Immunology, Taiyuan, 030032, People’s Republic of China
| | - Hechao Liu
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences; Tongji Shanxi Hospital, Department of Rheumatology and Immunology, Taiyuan, 030032, People’s Republic of China
| | - Zhiying Guo
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences; Tongji Shanxi Hospital, Department of Rheumatology and Immunology, Taiyuan, 030032, People’s Republic of China
| | - Hanxi Zhao
- SILC Business School, Shanghai University, Shanghai, 200444, People’s Republic of China
| | - Liyun Zhang
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences; Tongji Shanxi Hospital, Department of Rheumatology and Immunology, Taiyuan, 030032, People’s Republic of China
| | - Ke Xu
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences; Tongji Shanxi Hospital, Department of Rheumatology and Immunology, Taiyuan, 030032, People’s Republic of China
- Correspondence: Ke Xu, Email
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Zhao N, Tan H, Wang L, Han L, Cheng Y, Feng Y, Li T, Liu X. Palmitate induces fat accumulation via repressing FoxO1-mediated ATGL-dependent lipolysis in HepG2 hepatocytes. PLoS One 2021; 16:e0243938. [PMID: 33449950 PMCID: PMC7810308 DOI: 10.1371/journal.pone.0243938] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 11/30/2020] [Indexed: 02/05/2023] Open
Abstract
Obesity is closely associated with non-alcoholic fatty liver disease (NAFLD), and elevated serum palmitate is the link between obesity and excessive hepatic lipid accumulation. Forkhead box O-1 (FoxO1) is one of the FoxO family members of transcription factors and can stimulate adipose triglyceride lipase (ATGL) and suppress its inhibitor G0/G1 switch gene 2 (G0S2) expression in the liver. However, previous researches have also shown conflicting results regarding the role of FoxO1 in hepatic lipid accumulation. We therefore examined the role of FoxO1 as a downstream suppressor to palmitate-stimulated hepatic steatosis. Palmitate significantly promoted lipid accumulation but inhibited lipid decomposition in human HepG2 hepatoma cells. Palmitate also significantly reduced FoxO1, ATGL and its activator comparative gene identification-58 (CGI-58) expression but increased peroxisome proliferator-activated receptorγ (PPARγ) and its target gene G0S2 expression. FoxO1 overexpression significantly increased palmitate-inhibited ATGL and CGI-58 expression but reduced palmitate-stimulated PPARγ and its target gene G0S2 expression. FoxO1 overexpression also inhibited lipid accumulation and promoted lipolysis in palmitate-treated hepatocytes. Overall, these results indicate that FoxO1-mediated ATGL-dependent lipolysis may be an effective molecular mechanism in protecting hepatocytes from palmitate-induced fat accumulation.
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Affiliation(s)
- Naiqian Zhao
- Department of Gerontology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- * E-mail:
| | - Huiwen Tan
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Li Wang
- Department of Gerontology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Le Han
- Department of Gerontology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yanli Cheng
- Department of Gerontology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Ying Feng
- Department of Gerontology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Ting Li
- Department of Gerontology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xiaoling Liu
- Department of Gerontology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
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Liu H, Wang F. Research on N2-inhibitor-water mist fire prevention and extinguishing technology and equipment in coal mine goaf. PLoS One 2019; 14:e0222003. [PMID: 31483841 PMCID: PMC6726227 DOI: 10.1371/journal.pone.0222003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 08/20/2019] [Indexed: 11/19/2022] Open
Abstract
In this study, a new type of N2-inhibitor-water mist (NIWM) technology was proposed to resolve the problem of fire prevention and extinguishing in the goaf of coal mine. The corresponding equipment was designed and manufactured. Under the condition that both gas pressure and liquid pressure were 0.5-2MPa, the NIWM equipment produced the water mist with Sauter mean diameter (SMD) range of 166-265μm. The experimental results of the operating parameters of NIWM equipment were in agreement with the theoretical derivation. The theory of two-phase flow atomisation can be used as theoretical guide for this technology. After that, on the basis of the NIWM equipment, the experiments of inhibiting low temperature (30-100°C) oxidation and extinguishing high temperature combustion of large dosage of coal sample were carried out. Water mist with SMD = 188μm had good diffusivity in the container. The inhibiting effect of N2-inhibitor-water mist on low temperature oxidation of coal was obviously greater than that of single material. N2-water mist extinguished the burning coal completely in 20 minutes. The addition of water mist solved the shortcoming of poor cooling effect of N2. In different stages of coal-oxygen reaction, N2, inhibitor and water mist play very different role in controlling the process of coal-oxygen reaction, which was not simple accumulation of the three. The combination of N2, inhibitor and water mist should be determined according to the state of the coal mine goaf fire. On the basis of the research conclusions, the onsite arrangement diagram of the NIWM fire prevention and extinguishing equipment in the goaf was designed. The research results proved the feasibility and effectiveness of this technology, and it is of great significance to the prevention and control of coal spontaneous combustion in goaf.
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Affiliation(s)
- Hongwei Liu
- College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan, China
- Center of Shanxi Mine Safety for Graduate Education Innovation, Taiyuan, China
| | - Fei Wang
- College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan, China
- Center of Shanxi Mine Safety for Graduate Education Innovation, Taiyuan, China
- * E-mail:
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