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Li S, Li H, Zhou Z, Ye M, Wang Y, Li W, Guan Z, Guan Z, Zhang C, Zhang Y, Liu W, Peng K. A viral necrosome mediates direct RIPK3 activation to promote inflammatory necroptosis. Proc Natl Acad Sci U S A 2025; 122:e2420245122. [PMID: 40424123 DOI: 10.1073/pnas.2420245122] [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: 10/03/2024] [Accepted: 03/31/2025] [Indexed: 05/29/2025] Open
Abstract
Necroptosis is an inflammatory programmed cell death pathway triggered by RIPK3 activation through one of the upstream RHIM-domain-containing proteins including RIPK1, TRIF, and ZBP1. Whether necroptosis can be activated independent of the upstream signaling pathways leading to inflammatory pathogenesis remains ambiguous. Here, we revealed a mechanism in which a viral protein mediates direct RIPK3 activation resulting in severe inflammatory pathogenesis in patients. The nonstructural protein NSs of a pathogenic hemorrhagic virus, SFTSV, interacts with the RIPK3 kinase domain and forms biocondensate to promote RIPK3 autophosphorylation and necroptosis activation in an RHIM-independent manner. In parallel, sequestration of RIPK3 within the NSs-RIPK3 condensate inhibited RIPK3-mediated apoptosis and promoted viral replication. Infection with an SFTSV NSs mutant virus not forming NSs condensate triggered pronounced apoptosis resulting in reduced viral replication and decreased fatality in vivo. Blocking SFTSV-triggered necroptosis through depletion of MLKL or treatment with a RIPK3-kinase inhibitor reduced viral inflammatory pathogenesis and fatality in vivo. In contrast, blocking SFTSV-triggered apoptosis through depletion of RIPK3 resulted in enhanced viral replication and increased fatality in vivo. The virus-triggered necroptosis correlated with severe inflammatory pathogenesis and lethality in virus-infected patients. The NSs-RIPK3 condensate may represent a necroptosis activation mechanism that promotes viral pathogenesis.
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Affiliation(s)
- Shufen Li
- State Key Laboratory of Virology and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
- Medical School, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
| | - Hao Li
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100850, People's Republic of China
| | - Zhenxing Zhou
- State Key Laboratory of Virology and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
| | - Meidi Ye
- State Key Laboratory of Virology and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
- Medical School, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
| | - Yifei Wang
- State Key Laboratory of Virology and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
- Medical School, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
| | - Wenqin Li
- State Key Laboratory of Virology and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
- Medical School, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
| | - Zhenqiong Guan
- State Key Laboratory of Virology and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
- Medical School, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
| | - Zihan Guan
- State Key Laboratory of Virology and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
- Medical School, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
| | - Chongtao Zhang
- State Key Laboratory of Virology and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
| | - Yulan Zhang
- State Key Laboratory of Virology and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
| | - Wei Liu
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100850, People's Republic of China
| | - Ke Peng
- State Key Laboratory of Virology and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
- Medical School, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
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2
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Wang X, Zheng X, Ge H, Cui N, Lin L, Yue M, Zhu C, Zhou Q, Song P, Shang X, Wang R, Wang Z, Wang Z, Zhang Y, Yin X, Yang L, Su H, Li H, Liu W. Metformin as antiviral therapy protects hyperglycemic and diabetic patients. mBio 2025:e0063425. [PMID: 40391966 DOI: 10.1128/mbio.00634-25] [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: 02/21/2025] [Accepted: 04/22/2025] [Indexed: 05/22/2025] Open
Abstract
Viral infections disrupt glucose metabolism; however, their impact on disease prognosis in highly pathogenic viruses remains largely unknown. There is an additional need to investigate the antiviral mechanisms of glucose-lowering therapeutics. Here, our multicenter clinical study shows that hyperglycemia and pre-existing diabetes are independent risk factors for mortality in patients infected with severe fever with thrombocytopenia syndrome virus (SFTSV), an emerging and highly pathogenic bunyavirus. SFTSV infection triggers gluconeogenesis, which, in turn, inhibits AMPK activity and subsequent interferon I (IFN-I) responses, thereby facilitating viral replication. In vitro and animal studies further reveal that metformin inhibits SFTSV replication by suppressing autophagy through the AMPK-mTOR pathway, contributing to protection against lethal SFTSV infection in mice. Importantly, our large cohort study demonstrates that metformin reduces viremia and SFTSV-related mortality in patients with hyperglycemia or pre-existing diabetes, contrasting with the disadvantageous effect of insulin. These findings highlight the promising therapeutic potential of metformin in treating viral infections, particularly among individuals with hyperglycemia or diabetes. IMPORTANCE Severe fever with thrombocytopenia syndrome virus (SFTSV), an emerging tick-borne bunyavirus, causes severe hemorrhagic fever with a high mortality rate. Previous studies have shown metabolic disturbances, particularly hyperglycemia, in SFTSV-infected individuals. However, the mechanism underlying this metabolic derangement remains unclear, and further investigation is needed to determine whether glucose-lowering therapeutics could be beneficial for SFTSV-infected patients. In this study, our multicenter clinical data show that hyperglycemia and pre-existing diabetes are independent risk factors for mortality in patients with SFTSV infection. Furthermore, we observed that SFTSV infection triggers gluconeogenesis, which promotes viral replication through the regulation of the AMPK-IFN-I signaling pathway. Notably, metformin significantly reduces viremia and SFTSV-related mortality in patients with hyperglycemia or pre-existing diabetes, attributed to its inhibitory effect on autophagy through the AMPK-mTOR pathway. Therefore, our study uncovers the interaction between SFTSV infection and glucose metabolic disorder and highlights the promising therapeutic potential of metformin for treating SFTSV infection.
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Affiliation(s)
- Xi Wang
- School of Public Health, Anhui Medical University, Hefei, Anhui, China
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Xiaojie Zheng
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Honghan Ge
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Ning Cui
- The 154th Hospital, China RongTong Medical Healthcare Group Co.Ltd, Xinyang, Henan, China
| | - Ling Lin
- Yantai Qishan Hospital, Yantai, Shandong, China
| | - Ming Yue
- The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Chuanlong Zhu
- The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Qi Zhou
- Shandong Provincial Public Health Clinical Center, Jinan, Shandong, China
| | - Peixin Song
- Nanjing Drum Tower Hospital, Nanjing, Jiangsu, China
| | - Xing Shang
- School of Public Health, Anhui Medical University, Hefei, Anhui, China
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Rui Wang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
| | - Zhen Wang
- The 154th Hospital, China RongTong Medical Healthcare Group Co.Ltd, Xinyang, Henan, China
| | - Zhiyou Wang
- The 154th Hospital, China RongTong Medical Healthcare Group Co.Ltd, Xinyang, Henan, China
| | - Yunfa Zhang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Xiaohong Yin
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Linsheng Yang
- School of Public Health, Anhui Medical University, Hefei, Anhui, China
| | - Hong Su
- School of Public Health, Anhui Medical University, Hefei, Anhui, China
| | - Hao Li
- School of Public Health, Anhui Medical University, Hefei, Anhui, China
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Wei Liu
- School of Public Health, Anhui Medical University, Hefei, Anhui, China
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
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3
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Zhang YF, Cui N, Yang T, Wang JX, Chen JH, Yang X, Wu YX, Hu LF, Zhang XA, Lu QB, Su X, Li H, Liu W. Endothelial cell-released mitochondrial DNA promotes B cell differentiation and virus replication during severe fever with thrombocytopenia syndrome virus infection. J Virol 2025:e0132324. [PMID: 40366175 DOI: 10.1128/jvi.01323-24] [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: 09/21/2024] [Accepted: 04/15/2025] [Indexed: 05/15/2025] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease acquired through tick bites. We have previously demonstrated the correlation between SFTSV-induced mitochondrial dysfunction and inflammation induction, disease progression, and fatal outcome. In the current study, our clinical observation study establishes a strong correlation between elevated levels of circulating cell-free mtDNA and poor prognosis. In vivo studies further reveal endothelial cells as an important source responsible for releasing mtDNA into circulation, which promotes B cell activation, migration, and differentiation via Toll-like receptor 9 (TLR9). Notably, TLR9 activation enhances B-cell susceptibility to SFTSV infection. These findings suggest that mtDNA released by injured endothelial cells facilitates B cell differentiation and virus replication, emphasizing the significant role of mitochondrial damage within endothelial cells in contributing to the severity of SFTS outcomes.IMPORTANCESevere fever with thrombocytopenia syndrome (SFTS) is a new acute tick-borne infectious disease with a high fatality rate of 10%-50%. There is a strong correlation between SFTSV-induced mitochondrial dysfunction and inflammation induction, disease progression, and fatal outcome. Our research has revealed the crucial role of mtDNA in predicting the prognosis of SFTS and its impact on vascular endothelial injuries as well as B cell differentiation, two previously unexplored features of SFTSV infection. Moreover, mtDNA could activate the TLR9 signal to induce plasmablast differentiation in B cells and promote SFTSV infection. This study provides valuable mechanistic and clinical insights into the adverse outcomes associated with SFTSV infection.
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Affiliation(s)
- Yun-Fa Zhang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Ning Cui
- The 154th Hospital, China RongTong Medical Healthcare Group Co.Ltd, Xinyang, China
| | - Tong Yang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Jin-Xia Wang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, China
| | - Jia-Hao Chen
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Xin Yang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Yong-Xiang Wu
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Li-Fen Hu
- Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Xiao-Ai Zhang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Qing-Bin Lu
- Department of Laboratorial Science and Technology, School of Public Health, Peking University, Beijing, China
| | - Xin Su
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, China
| | - Hao Li
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
| | - Wei Liu
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing, China
- Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
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4
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Wang Q, Dai Z, Hu X, Lu Z, Zheng D, Wang L, Xu L, Hong X, Bi J, Li X, Li D, Li S. A Single-Cell Atlas Revealed Altered B Cells and Neutrophils Immune Signatures and Inflammatory Responses in SFTSV Infection. J Med Virol 2025; 97:e70354. [PMID: 40263930 DOI: 10.1002/jmv.70354] [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: 12/04/2024] [Revised: 03/26/2025] [Accepted: 04/04/2025] [Indexed: 04/24/2025]
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) presents an emerging public threat due to its high mortality rate and ever-expanding geographic distribution. However, characterization of SFTSV infection pathogenesis and immunological impact at single-cell level remains underexplored. Here, we employ single-cell transcriptome-wide sequencing in peripheral blood mononuclear cells (PBMCs) from hospitalized SFTSV-infected patients to map the immune landscape across acute and convalescent stages of infection. The results reveal significant alterations in immune cell compositions, along with profound disruption in intercellular crosstalk. B cells and neutrophils appear to be the primary target for SFTSV infection besides monocytes, as evidenced by heightened virus-related pathways in these two cell types during the acute phase. In addition, SFTSV infection induces a substantial inflammatory response, which were prominently reflected in monocytes and neutrophils. These data illustrate the complex immune remodeling and inflammatory cascades triggered by SFTSV, with a particular focus on its effects on B cells and neutrophils, bringing novel insights into future therapeutic developments.
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Affiliation(s)
- Qiujing Wang
- Department of Infectious Diseases, Zhoushan Hospital, Wenzhou Medical University, Zhoushan, Zhejiang, China
| | - Ziniu Dai
- Center for Infectious Disease Research, Westlake University, Hangzhou, Zhejiang, China
- School of Medicine, Westlake University, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
| | - Xiaodan Hu
- Department of Infectious Diseases, Zhoushan Hospital, Wenzhou Medical University, Zhoushan, Zhejiang, China
| | - Zhengmei Lu
- Department of Infectious Diseases, Zhoushan Hospital, Wenzhou Medical University, Zhoushan, Zhejiang, China
| | - Di Zheng
- Department of Infectious Diseases, Zhoushan Hospital, Wenzhou Medical University, Zhoushan, Zhejiang, China
| | - Lingyun Wang
- College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Liyun Xu
- Cell and Molecular Biology Laboratory, Zhoushan Hospital, Wenzhou Medical University, Zhoushan, Zhejiang, China
| | - Xiaoci Hong
- Center for Infectious Disease Research, Westlake University, Hangzhou, Zhejiang, China
- School of Medicine, Westlake University, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
| | - Jinhao Bi
- Center for Infectious Disease Research, Westlake University, Hangzhou, Zhejiang, China
- School of Medicine, Westlake University, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
| | - Xinyi Li
- Center for Infectious Disease Research, Westlake University, Hangzhou, Zhejiang, China
- School of Medicine, Westlake University, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
| | - Dapeng Li
- Center for Infectious Disease Research, Westlake University, Hangzhou, Zhejiang, China
- School of Medicine, Westlake University, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, China
| | - Shibo Li
- Department of Infectious Diseases, Zhoushan Hospital, Wenzhou Medical University, Zhoushan, Zhejiang, China
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Xing C, Zhang C, Xu Z, Wang Y, Lu W, Liu X, Zhang Y, Ma J, Yang S, Du Y, Xu G, Liu Y. Genome-wide CRISPR screening identifies LRP1 as an entry factor for SFTSV. Nat Commun 2025; 16:4036. [PMID: 40301361 PMCID: PMC12041282 DOI: 10.1038/s41467-025-59305-0] [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: 08/29/2024] [Accepted: 04/15/2025] [Indexed: 05/01/2025] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging tick-borne disease caused by the SFTS virus (SFTSV), which has high mortality rates and poses a significant threat to public health. To identify potential therapeutic targets against SFTSV, we conduct genome-wide knockout screening, which identifies the previously known host factor CCR2, and reveals prolow-density lipoprotein receptor-related protein 1 (LRP1) as an entry factor for SFTSV. Knockdown or knockout of LRP1 significantly attenuate SFTSV infection in mouse embryonic fibroblasts (MEFs). Additionally, inhibition of LRP1 suppresses SFTSV pseudovirus infection in MEFs, suggesting its role in viral entry. The interaction between the SFTSV glycoprotein Gn and LRP1 via the CLI and CLII domains is revealed by co-IP and surface plasmon resonance (SPR). Moreover, LRP1 antagonists and neutralizing antibodies effectively attenuate SFTSV infection in MEFs. Administration of an LRP1-neutralizing antibody in a lethal male mouse model reduces the viral load, mitigates tissue damage, and improves survival. This study identifies LRP1 as a host entry receptor for SFTSV, providing a target for therapeutic strategy development.
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Affiliation(s)
- Chen Xing
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
- Department of Pathogen Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Cong Zhang
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
- Anhui Province Key Laboratory of Zoonoses, Anhui Medical University, Hefei, China
| | - Zhihao Xu
- The First Clinical Medical School, Anhui Medical University, Hefei, China
| | - Yajie Wang
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Wanqing Lu
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Xiaohan Liu
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Yingying Zhang
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Jingyuan Ma
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Shuqi Yang
- Department of Pathogen Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Yinan Du
- Department of Pathogen Biology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
- Anhui Province Key Laboratory of Zoonoses, Anhui Medical University, Hefei, China
| | - Gang Xu
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China.
- Department of Infectious Diseases, The Second Affiliated Hospital of Anhui Medical University, Hefei, China.
| | - Yan Liu
- Department of Microbiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China.
- Anhui Province Key Laboratory of Zoonoses, Anhui Medical University, Hefei, China.
- State Key Laboratory for Safe Mining of Deep Coal Resources and Environment Protection, School of Public Health, Anhui University of Science and Technology, Huainan, China.
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6
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Javaid N, Jang TW, Fu Y, Choi Y. SFTSV NSs interacts with AGO2 to regulate the RNAi pathway for viral replication. J Virol 2025; 99:e0220524. [PMID: 40013801 PMCID: PMC11998505 DOI: 10.1128/jvi.02205-24] [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: 12/13/2024] [Accepted: 02/04/2025] [Indexed: 02/28/2025] Open
Abstract
RNA interference (RNAi) is a posttranscriptional gene silencing mechanism acting as an antiviral defense in eukaryotes. During viral replication, intermediate double-stranded RNAs are processed into virus-derived small interfering RNAs (vsiRNAs) by the host enzyme, DICER. These vsiRNAs are incorporated into the RNA-induced silencing complex (RISC), where AGO2 cleaves viral genomic RNAs. However, viruses have evolved mechanisms to suppress this pathway. Here, we report that the nonstructural protein (NSs) of severe fever with thrombocytopenia syndrome virus (SFTSV) interacts with RISC to suppress the RNAi pathway. NSs forms a ternary complex by interacting with both DICER and AGO2 of the RNAi pathway. The interaction between NSs and DICER, facilitated by the two RNase III domains of DICER, is disrupted in the absence of AGO2 or the DICER-interacting domain (PIWI) of AGO2, indicating a direct interaction between NSs and AGO2. Functional assays using shRNA- and siRNA-mediated silencing of GFP signal, along with co-localization studies, demonstrated that NSs competes with siRNA to interact with AGO2, thereby abolishing RNAi activity. Mutational analysis identified an NSs-A26 mutant that no longer interacts with AGO2 and is unable to suppress RNAi activity, suggesting that NSs acts as a viral suppressor of RNAi (VSR) for SFTSV. Viral infection led to the generation of vsiRNA and showed higher replication in AGO2-/- cells compared to wild-type (WT) cells, confirming the antiviral role of the RNAi pathway against SFTSV infection. These data suggest that the NSs-AGO2 interaction suppresses RNAi, counteracting the antiviral RNAi pathway, thereby facilitating SFTSV infection and pathogenesis.IMPORTANCERNA interference (RNAi) is the main antiviral defense pathway in plants and insects but is not predominant in mammals. While RNAi's role in countering severe fever with thrombocytopenia syndrome virus (SFTSV) infection has been studied in ticks, its role in humans is unknown. The SFTSV nonstructural protein (NSs) forms inclusion bodies (IBs) in the host, sequestering multiple antiviral proteins and facilitating pathogenesis, contributing to SFTSV's high mortality rate. Our study found that SFTSV NSs directly interacts with AGO2, a key RNAi protein, hindering its function. A novel NSs mutant failed to interact with AGO2 and lost its RNAi suppression ability, highlighting NSs as a viral suppressor of RNAi (VSR). Infection studies confirmed the RNAi pathway's critical role in combating SFTSV infection. This study demonstrates NSs's role in viral infection and suggests potential therapeutic approaches.
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Affiliation(s)
- Nasir Javaid
- Florida Research and Innovation Center, Cleveland Clinic, Port St. Lucie, Florida, USA
| | - Tae-Won Jang
- Florida Research and Innovation Center, Cleveland Clinic, Port St. Lucie, Florida, USA
| | - Yuting Fu
- Florida Research and Innovation Center, Cleveland Clinic, Port St. Lucie, Florida, USA
| | - Younho Choi
- Florida Research and Innovation Center, Cleveland Clinic, Port St. Lucie, Florida, USA
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7
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Zhang Y, Tian W, Zhang S, Lin L, Song C, Liu Y, Xu Y, Zhang L, Geng S, Li X, Wang X, Chen Z, Zhang W. Enhancing Sensitivity in Detecting Severe Fever With Thrombocytopenia Syndrome Virus: Development of a Reverse Transcription-Droplet Digital Polymerase Chain Reaction. J Infect Dis 2025; 231:512-520. [PMID: 39352170 DOI: 10.1093/infdis/jiae442] [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: 01/04/2024] [Accepted: 08/31/2024] [Indexed: 02/21/2025] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is a highly fatal disease. Droplet digital polymerase chain reaction (ddPCR) presents unparalleled sensitivity and enables absolute quantification of viral load. In this prospective study, we enrolled 111 patients with SFTS and collected 259 continuous samples. Our findings unveil a robust reverse transcription (RT)-ddPCR method for SFTS with a limit of detection of 2.46 copies/µL (95% CI, 1.50-11.05), surpassing the sensitivity of RT-quantitative polymerase chain reaction at 103.29 copies/µL (95% CI, 79.69-216.35). Longitudinal cohort analysis revealed significantly higher RT-ddPCR detection rates at days 10 to 11, 13 to 14, and ≥15 of the disease course as compared with RT-quantitative polymerase chain reaction (P < .05). Positive RT-ddPCR results were associated with declined platelet and elevated aspartate aminotransferase and lactate dehydrogenase on the same day vs negative RT-ddPCR samples. RT-ddPCR exhibits commendable diagnostic efficacy in SFTS, and it remains detectable in blood samples from patients with an extended disease course. Furthermore, RT-ddPCR correlates with clinical laboratory tests, furnishing valuable reference data for clinical diagnosis.
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Affiliation(s)
- Yuanyuan Zhang
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
- Beijing Institute of Infectious Diseases
- National Center for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
| | - Wen Tian
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
- National Center for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
| | - Shuai Zhang
- Department of Clinical Laboratory, Yantai Qishan Hospital
| | - Ling Lin
- Department of Infectious Diseases, Yantai Qishan Hospital
| | - Chuan Song
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
- Beijing Institute of Infectious Diseases
- National Center for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
| | - Yuanni Liu
- Department of Infectious Diseases, Yantai Qishan Hospital
| | - Yanli Xu
- Department of Infectious Diseases, Yantai Qishan Hospital
| | - Ligang Zhang
- Department of Infectious Diseases, Yantai Qishan Hospital
| | - Shuying Geng
- Department of Infectious Diseases, Yantai Qishan Hospital
| | - Xin Li
- Center of Integrative Medicine, Beijing Ditan Hospital, Capital Medical University
| | - Xi Wang
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
- Beijing Institute of Infectious Diseases
- National Center for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
| | - Zhihai Chen
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
- National Center for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
| | - Wei Zhang
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
- National Center for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
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8
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Xu N, Wen S, Yao Y, Guan Y, Zhao L, Yang L, Yang H, He Y, Wang G. Two-transcript signature for differentiation and clinical outcomes in severe fever with thrombocytopenia syndrome (SFTS) patients: a double-blind, multicenter, validation study. J Clin Microbiol 2025; 63:e0128224. [PMID: 39688402 PMCID: PMC11784442 DOI: 10.1128/jcm.01282-24] [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: 08/16/2024] [Accepted: 11/12/2024] [Indexed: 12/18/2024] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease with a high mortality rate that is often underdiagnosed due to the limitations of current laboratory testing. Timely diagnosis and early identification of severe cases are crucial to improving patient outcomes and overall survival rates. This study aimed to evaluate the efficacy of two transcripts, IFI44L and PI3, in the early differentiation between SFTS virus (SFTSV) infection and bacterial sepsis, as well as in the prompt identification of severe cases during epidemic seasons. In a prospective study conducted between 1 May 2021 and 30 September 2022, we enrolled 225 patients who presented with acute fever and thrombocytopenia at four hospitals in Shandong Province, China. The two-transcript signature provided a clear distinction between SFTS and bacterial infection, achieving an area under the receiver operating characteristic curve of 0.961 (95% confidence interval [95% CI] 0.916-0.986), outperforming C-reactive protein (0.810 [95% CI 0.738-0.870]) and procalcitonin (0.764 [95% CI 0.687-0.830]). Importantly, the relative expression of the IFI44L gene was significantly elevated in fatal SFTS cases, with an area under the curve (AUC) of 0.820 (95% CI 0.727-0.914), indicating its potential as an early prognostic marker. Additionally, IFI44L and PI3 were identified as potential biomarkers for distinguishing SFTS patients with and without invasive pulmonary aspergillosis, with AUC values of 0.817 and 0.753, respectively. Our findings demonstrate that the two-transcript signature effectively distinguishes SFTSV infection from bacterial sepsis and helps identify high-risk individuals, guiding appropriate treatment during SFTS outbreak.
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Affiliation(s)
- Nannan Xu
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Sai Wen
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | | | - Yanyan Guan
- Department of Infectious Disease, Rizhao People's Hospital, Rizhao, China
| | - Lianhui Zhao
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Lulu Yang
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Hui Yang
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Yishan He
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Gang Wang
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
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Zhao Y, Wu X, Wang X, Li L. Severe fever with thrombocytopenia syndrome complicated with aspergillus endocarditis and multiple organ infarctions after glucocorticoid treatment in an immunocompetent man: a case report. BMC Infect Dis 2025; 25:116. [PMID: 39856548 PMCID: PMC11761758 DOI: 10.1186/s12879-025-10503-7] [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: 12/10/2024] [Accepted: 01/15/2025] [Indexed: 01/27/2025] Open
Abstract
BACKGROUND Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease characterized by leukopenia and thrombocytopenia, and aspergillosis is a common complication in severe cases. Previous studies have reported cases of SFTS complicated with invasive pulmonary aspergillosis (IPA) and central nervous system aspergillosis. Here, we present the first case of an immunocompetent patient with SFTS who progressed to IPA and Aspergillus endocarditis after glucocorticoid treatment, and embolism of the vegetations from the left ventricle led to multiple infarctions in the brain, kidney, and spleen. CASE PRESENTATION A 66-year-old male farmer developed altered mental status during SFTS. His consciousness improved during the treatment of glucocorticoids, intravenous immunoglobulin, and ribavirin, but he developed embolisms in the spleen and right kidney, initially attributed to atrial fibrillation, and the anticoagulant agent was not administered due to the high risk of bleeding. Later, He was diagnosed with SFTS-associated IPA (SAPA), for which voriconazole was administered. However, he subsequently experienced a recurrence of altered mental status, accompanied by headache, blindness, and muscle weakness. Brain magnetic resonance imaging (MRI) revealed multiple cerebral embolisms and abscess. The echocardiography showed the vegetations in the left ventricle, suggesting multi-organ embolism caused by infective endocarditis (IE). Aspergillus fumigatus was confirmed through pathology and culture of the excised vegetations. The patient was eventually discharged with improved consciousness and muscle strength, but his vision showed minimal recovery. CONCLUSION Clinicians should be wary of aspergillosis in severe patients with SFTS, particularly those receiving glucocorticoid treatment. In patients with SAPA, cerebral aspergillosis and embolic stroke caused by Aspergillus endocarditis should also be considered when mental status alters. Furthermore, the possibility of Aspergillosis in other organs should be considered in high-risk patients.
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Affiliation(s)
- Yuxi Zhao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Rd., Hangzhou City, 310003, China
| | - Xiaoxin Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Rd., Hangzhou City, 310003, China
| | - Xinyu Wang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Rd., Hangzhou City, 310003, China
| | - Lanjuan Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Rd., Hangzhou City, 310003, China.
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10
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Yang X, Si GQ, Ge HH, Li CH, Cui N, Yuan YM, Zhou C, Li H, Zhang XA, Lin L, Bao PT, Liu W. Atypical Patients With Severe Fever With Thrombocytopenia Syndrome. J Med Virol 2025; 97:e70164. [PMID: 39825735 DOI: 10.1002/jmv.70164] [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: 10/28/2024] [Revised: 12/19/2024] [Accepted: 12/28/2024] [Indexed: 01/20/2025]
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging tick-borne disease with a high fatality rate. The clinical diagnosis criteria mainly rely on white blood cell (WBC) and platelet (PLT), which, however, are of limited usage in identifying atypical SFTS. A multicenter study was performed in two hospitals from 2011 to 2023. SFTS patients were categorized as atypical or typical based on the clinical diagnosis criteria. Clinical progress and outcomes were compared between the two groups. A total of 2876 laboratory-confirmed SFTS patients were included in this study, 90.54% (2604/2876) of whom exhibited both thrombocytopenia and leukopenia and were defined as typical SFTS patients, while 9.46% (272/2876) were defined as atypical SFTS patients. Patients with typical SFTS were more likely to develop complications (adjusted odds ratio [OR] = 2.09, 95% confidence interval [CI]:1.48-2.92, p < 0.001) and fatal outcomes (adjusted OR = 2.24, 95% CI: 1.37-3.89, p = 0.002) compared to patients with atypical SFTS. Among atypical patients, those with decreased PLT and normal WBC levels (PLT↓ and WBC→) experienced increased complication rates (adjusted OR = 2.76, 95% CI: 1.30-6.05, p < 0.001) compared to those with decreased WBC and normal PLT (WBC↓ and PLT→). In the typical group, 238 patients developed thrombocytopenia earlier than leukocytopenia (defined as the TL group), while 311 subjects developed leukocytopenia earlier than thrombocytopenia (defined as the LT group). Compared to the LT group, patients in the TL group were more likely to develop fatal outcomes (HR = 1.91, 95% CI: 1.04-3.50). These findings highlight the presence of atypical SFTS cases that did not meet the clinical diagnosis criteria. Clinical profiles and outcomes differed between typical and atypical SFTS patients. A less stringent diagnostic criterion than combined thrombocytopenia and leukopenia is suggested for making clinical diagnoses within 7 days of disease onset.
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Affiliation(s)
- Xin Yang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China
| | - Guang-Qian Si
- Graduate School, Hebei North University, Zhangjiakou, China
| | - Hong-Han Ge
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Chun-Hui Li
- Yantai Center for Disease Control and Prevention, Yantai, China
| | - Ning Cui
- The 154th Hospital, China RongTong Medical Healthcare Group Co. Ltd, Xinyang, China
| | - Yi-Mei Yuan
- The 154th Hospital, China RongTong Medical Healthcare Group Co. Ltd, Xinyang, China
| | - Chao Zhou
- The 154th Hospital, China RongTong Medical Healthcare Group Co. Ltd, Xinyang, China
| | - Hao Li
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China
| | - Xiao-Ai Zhang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China
| | - Ling Lin
- Department of Infectious Diseases, Yantai Qishan Hospital, Yantai, China
| | - Peng-Tao Bao
- Senior Department of Pulmonary and Critical Care Medicine, The Eighth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Wei Liu
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China
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11
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Zhao Y, Wu X, Wang X, Li L. Evolving therapeutic strategies for severe fever with thrombocytopenia syndrome: from past to future. Ther Adv Infect Dis 2025; 12:20499361251340786. [PMID: 40385974 PMCID: PMC12084703 DOI: 10.1177/20499361251340786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2024] [Accepted: 04/23/2025] [Indexed: 05/20/2025] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is a hemorrhagic fever caused by Bandavirus dabieense. SFTS was first identified in China in 2009 and has been reported since then in neighboring countries and regions. The clinical manifestations of SFTS include fever, thrombocytopenia, and leukocytopenia and are often accompanied by gastrointestinal symptoms and bleeding. In severe cases, patients experience life-threatening immune damage and cytokine storms. Despite nearly 15 years since its discovery, no effective vaccine has been approved. However, significant progress has been achieved in elucidating the mechanisms of host immune responses, accompanied by the clinical implementation of various therapeutic agents. This article provides a comprehensive review of commonly utilized treatments supported by current clinical evidence. Favipiravir has advantages over ribavirin in terms of viral clearance and prognosis. Conventional immunomodulators like interferon, intravenous immunoglobulin, and glucocorticoids have limited effects and may even worsen conditions, whereas novel immunomodulators such as tocilizumab and ruxolitinib have shown potential for improving prognosis. Prophylactic platelet transfusions neither prevent bleeding nor improve clinical outcomes. Additionally, plasma exchange, calcium channel blockers, and arginine can improve laboratory values and expedite viral clearance. In the future, screening Food and Drug Administration-approved drugs and conducting multiomics analyses may lead to the discovery of new effective therapeutic options.
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Affiliation(s)
- Yuxi Zhao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City, China
| | - Xiaoxin Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City, China
| | - Xinyu Wang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City, China
| | - Lanjuan Li
- State Key Laboratory for the Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou City 310003, China
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12
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Han S, Ye X, Yang J, Peng X, Jiang X, Li J, Zheng X, Zhang X, Zhang Y, Zhang L, Wang W, Li J, Xin W, Zhang X, Xiao G, Peng K, Zhang L, Du X, Zhou L, Liu W, Li H. Host specific sphingomyelin is critical for replication of diverse RNA viruses. Cell Chem Biol 2024; 31:2052-2068.e11. [PMID: 39566509 DOI: 10.1016/j.chembiol.2024.10.009] [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: 06/17/2024] [Revised: 08/28/2024] [Accepted: 10/23/2024] [Indexed: 11/22/2024]
Abstract
Lipids and lipid metabolism play an important role in RNA virus replication, which typically occurs on host cell endomembrane structures in the cytoplasm through mechanisms that are not yet fully identified. We conducted genome-scale CRISPR screening and identified sphingomyelin synthase 1 (SMS1; encoded by SGMS1) as a critical host factor for infection by severe fever with thrombocytopenia syndrome virus (SFTSV). SGMS1 knockout reduced sphingomyelin (SM) (d18:1/16:1) levels, inhibiting SFTSV replication. A helix-turn-helix motif in SFTSV RNA-dependent RNA polymerase (RdRp) directly binds to SM(d18:1/16:1) in Golgi apparatus, which was also observed in SARS-CoV-2 and lymphocytic choriomeningitis virus (LCMV), both showing inhibited replication in SGMS1-KO cells. SM metabolic disturbance is associated with disease severity of viral infections. We designed a novel SMS1 inhibitor that protects mice against lethal SFTSV infection and reduce SARS-CoV-2 replication and pathogenesis. These findings highlight the critical role of SMS1 and SM(d18:1/16:1) in RNA virus replication, suggesting a broad-spectrum antiviral strategy.
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Affiliation(s)
- Shuo Han
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100071, China
| | - Xiaolei Ye
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100071, China
| | - Jintong Yang
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Xuefang Peng
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100071, China
| | - Xiaming Jiang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
| | - Jin Li
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Xiaojie Zheng
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100071, China
| | - Xinchen Zhang
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Yumin Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
| | - Lingyu Zhang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100071, China
| | - Wei Wang
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Jiaxin Li
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100071, China
| | - Wenwen Xin
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100071, China
| | - Xiaoai Zhang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100071, China
| | - Gengfu Xiao
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
| | - Ke Peng
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
| | - Leike Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
| | - Xuguang Du
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Lu Zhou
- School of Pharmacy, Fudan University, Shanghai 201203, China.
| | - Wei Liu
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100071, China.
| | - Hao Li
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing 100071, China.
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13
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Meng T, Ding W, Lv D, Wang C, Xu Y. Lactate dehydrogenase to albumin ratio (LAR) is a novel predictor of fatal outcome in patients with SFTS: an observational study. Front Public Health 2024; 12:1459712. [PMID: 39741938 PMCID: PMC11685223 DOI: 10.3389/fpubh.2024.1459712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Accepted: 11/30/2024] [Indexed: 01/03/2025] Open
Abstract
Background Severe fever with thrombocytopenia syndrome (SFTS) is a serious infectious disease. This study explored the prognostic value of lactate dehydrogenase (LDH) to albumin (ALB) ratio (LAR) levels in fatal outcomes of the disease. Methods Two-hundred and nine patients with SFTS were enrolled in this study. Based on the prognosis, patients were divided into survival and deceased groups. Laboratory metrics were compared by univariate Cox regression and multivariate Cox regression analyses. The prognostic risk factors for SFTS disease were discussed, and the receiver operator characteristic (ROC) curve and the Kaplan-Meier survival curve were plotted to analyze the predictive value of independent risk factors on disease prognosis. Results A total of 209 patients with SFTS, including 152 in the survival group and 57 in the death group, were enrolled. The median age of 209 SFTS patients was 64 years. Three indicators, age, aspartate aminotransferase (AST), and LAR, were identified as predictors of mortality in patients with SFTS. The area under the ROC curve of LAR was the highest (0.835), followed by that of AST (0.794), and age (0.720). The Kaplan-Meier survival curve showed an increased case fatality rate, of >1.4691, in patients with LAR. Conclusion Elevated LAR level on admission is an independent risk factor for fatal outcomes in patients with SFTS; this can help healthcare professionals identify patients with SFTS having a high risk of fatal outcomes.
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Affiliation(s)
- Tao Meng
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Wenqian Ding
- Department of Pediatrics, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Dongmei Lv
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Chenxu Wang
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yuanhong Xu
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, China
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14
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Zhang Y, Sun Q, Liu T, Chang C, Chen X, Duan Q, Wen Z, Zhang X, Pang B, Jiang X. Transcriptome Profiles Characteristics of the Peripheral Immune in Patients with Severe Fever with Thrombocytopenia Syndrome. J Inflamm Res 2024; 17:8357-8374. [PMID: 39530000 PMCID: PMC11552436 DOI: 10.2147/jir.s485118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Accepted: 10/15/2024] [Indexed: 11/16/2024] Open
Abstract
Purpose Severe fever with thrombocytopenia syndrome (SFTS) is an acute viral infection disease with a high mortality, but there are no specific effective drugs or vaccines available for use. To develop effective treatment methods, more basic researches are urgently needed to elucidate the response mechanisms of patients. Patients and Methods Here, we conducted the transcriptomic analysis of peripheral immunity in 14 SFTS patients, ranging from moderate infection to severe and fatal disease. Results The results showed orderly cytokine signaling pathway modulation in moderate patients, cellular immunosuppression in severe patients, and significant dysregulation of the inflammatory response and coagulation dysfunction characteristic of deceased patients. In addition, WGCNA further showed a significant positive correlation between fatal outcomes and B cell and immunoglobulin mediated immune function modules, as well as a significant negative correlation with coagulation function modules. Conclusion Overall, our research findings systematically observed potential immune mechanisms underlying clinical symptom heterogeneity and noteworthily revealed multiple signaling pathways leading to coagulation dysfunction in fatal outcomes, not just related to decreased platelet count, which can further elucidate the interaction between viruses and hosts and contribute to clinical treatment.
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Affiliation(s)
- Yuwei Zhang
- Infectious Disease Prevention and Control Section, Shandong Center for Disease Control and Prevention, Jinan, Shandong Province, People’s Republic of China
| | - Qingshuai Sun
- School of Public Health and Health Management, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong Province, People’s Republic of China
| | - Tao Liu
- Department of Infectious Disease Control, Yantai Center for Disease Control and Prevention, Yantai, Shandong Province, People’s Republic of China
| | - Caiyun Chang
- Institute for Infectious Disease Control, Jinan Center for Disease Control and Prevention, Jinan, Shandong Province, People’s Republic of China
| | - Xiangjuan Chen
- School of Public Health and Health Management, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong Province, People’s Republic of China
| | - Qing Duan
- Infectious Disease Prevention and Control Section, Shandong Center for Disease Control and Prevention, Jinan, Shandong Province, People’s Republic of China
| | - Zixuan Wen
- School of Public Health, Weifang Medical University, Weifang, Shandong Province, People’s Republic of China
| | - Xiaomei Zhang
- Infectious Disease Prevention and Control Section, Shandong Center for Disease Control and Prevention, Jinan, Shandong Province, People’s Republic of China
| | - Bo Pang
- Infectious Disease Prevention and Control Section, Shandong Center for Disease Control and Prevention, Jinan, Shandong Province, People’s Republic of China
| | - Xiaolin Jiang
- School of Public Health and Health Management, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong Province, People’s Republic of China
- School of Public Health, Weifang Medical University, Weifang, Shandong Province, People’s Republic of China
- Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Shandong Center for Disease Control and Prevention, Jinan, Shandong Province, People’s Republic of China
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15
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Qian H, Tian L, Liu W, Liu L, Li M, Zhao Z, Lei X, Zheng W, Zhao Z, Zheng X. Adenovirus type 5-expressing Gn induces better protective immunity than Gc against SFTSV infection in mice. NPJ Vaccines 2024; 9:194. [PMID: 39426985 PMCID: PMC11490641 DOI: 10.1038/s41541-024-00993-y] [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: 03/16/2024] [Accepted: 10/10/2024] [Indexed: 10/21/2024] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is caused by the SFTS virus (SFTSV) with high morbidity and mortality. The major immunodominant region of SFTSV surface glycoprotein (G) remains unclear. In this study, we constructed adenovirus type 5 (Ad5) vectored vaccine candidates expressing different regions of SFTSV G (Gn, Gc and Gn-Gc) and evaluated their immunogenicity and protective efficacy in mice. In wild-type mice, compared with Ad5-Gc or Ad5-Gn-Gc, Ad5-Gn recruited/activated more dendritic cells and B cells in lymph nodes or peripheral blood, causing Th1-/Th2-mediated responses in splenocytes and triggered a greater level of SFTSV-neutralizing antibodies. In IFNAR Ab-treated mice, immunization of Ad5-Gn exhibited better protection against SFTSV challenge than Ad5-Gc or Ad5-Gn-Gc. Furthermore, passive immunization revealed complete protective immunity of Gn-specific serum rather than Gc. Collectively, our data demonstrated that Gn is the immunodominant fragment of SFTSV G and could be a potential candidate for SFTSV vaccine development.
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Affiliation(s)
- Hua Qian
- The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Li Tian
- The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Wenkai Liu
- Department of Virology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Lele Liu
- Department of Virology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Menghua Li
- Department of Virology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Zhongxin Zhao
- Department of Laboratory Medicine, Linyi People's Hospital, Linyi, Shandong, China
| | - Xiaoying Lei
- Department of Virology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Wenwen Zheng
- Department of Virology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.
| | - Zhongpeng Zhao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Xuexing Zheng
- The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.
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16
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Guo S, Yan Y, Zhang J, Yang Z, Tu L, Wang C, Kong Z, Wang S, Wang B, Qin D, Zhou J, Wang W, Hao Y, Guo S. Serum lipidome reveals lipid metabolic dysregulation in severe fever with thrombocytopenia syndrome. BMC Med 2024; 22:458. [PMID: 39396989 PMCID: PMC11472499 DOI: 10.1186/s12916-024-03672-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2024] [Accepted: 09/30/2024] [Indexed: 10/15/2024] Open
Abstract
BACKGROUND Severe fever with thrombocytopenia syndrome (SFTS) is a rapidly progressing infectious disease with a high fatality rate caused by a novel bunyavirus (SFTSV). The role of lipids in viral infections is well-documented; however, the specific alterations in lipid metabolism during SFTSV infection remain elusive. This study aims to elucidate the lipid metabolic dysregulations in the early stages of SFTS patients. METHODS This study prospectively collected peripheral blood sera from 11 critical SFTS patients, 37 mild SFTS patients, and 23 healthy controls during the early stages of infection for lipidomics analysis. A systematic bioinformatics analysis was conducted from three aspects integrating lipid differential expressions, lipid differential correlations, and lipid-clinical indices correlations to reveal the serum lipid metabolic dysregulation in SFTSV-infected individuals. RESULTS Our findings reveal significant lipid metabolic dysregulation in SFTS patients. Specifically, compared to healthy controls, SFTS patients exhibited three distinct modes of lipid differential expression: increased levels of lipids including phosphatidylserine (PS), hexosylceramide (HexCer), and triglycerides (TG); decreased levels of lipids including lysophosphatidylcholine (LPC), acylcarnitine (AcCa), and cholesterol esters (ChE); and lipids showing "dual changes" including phosphatidylcholine (PC) and phosphatidylethanolamine (PE). Finally, based on lipid metabolic pathways and literature analysis, we systematically elucidated the potential mechanisms underlying lipid metabolic dysregulation in the early stage of SFTSV infection. CONCLUSIONS Our study presents the first global serum lipidome profile and reveals the lipid metabolic dysregulation patterns in the early stage of SFTSV infection. These findings provide a new basis for the diagnosis, treatment, and further investigation of the disease.
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Affiliation(s)
- Shuai Guo
- Department of Neurology, Shandong Provincial Hospital, Shandong University, Jinan, China
- Department of Neurology, Shandong Provincial HospitalAffiliated to, Shandong First Medical University , Jinan, China
| | - Yunjun Yan
- Jinan Dian Medical Laboratory CO., LTD, Shandong, China
| | - Jingyao Zhang
- Department of Infectious Diseases, Shandong Provincial Public Health Clinical Center, Jinan, China
| | - Zhangong Yang
- Calibra Lab at DIAN Diagnostics, Hangzhou, 310030, China
| | - Lirui Tu
- Department of Infectious Diseases, Shandong Provincial Public Health Clinical Center, Jinan, China
| | - Chunjuan Wang
- Department of Neurology, Shandong Provincial Hospital, Shandong University, Jinan, China
- Department of Neurology, Shandong Provincial HospitalAffiliated to, Shandong First Medical University , Jinan, China
| | - Ziqing Kong
- Calibra Lab at DIAN Diagnostics, Hangzhou, 310030, China
| | - Shuhua Wang
- Center of Health Management, Shandong Provincial HospitalAffiliated to, Shandong First Medical University , Jinan, China
| | - Baojie Wang
- Department of Neurology, Shandong Provincial Hospital, Shandong University, Jinan, China
- Department of Neurology, Shandong Second Provincial General Hospital, Jinan, China
| | - Danqing Qin
- Department of Neurology, Shandong Provincial Hospital, Shandong University, Jinan, China
- Department of Neurology, Shandong Provincial HospitalAffiliated to, Shandong First Medical University , Jinan, China
| | - Jie Zhou
- Department of Neurology, Shandong Provincial HospitalAffiliated to, Shandong First Medical University , Jinan, China
- Department of Neurology, The Fifth People's Hospital of Jinan, Jinan, China
| | - Wenjin Wang
- Department of Neurology, Shandong Provincial Hospital, Shandong University, Jinan, China
- Department of Neurology, Shandong Provincial HospitalAffiliated to, Shandong First Medical University , Jinan, China
| | - Yumei Hao
- Institute of Reproduction and Development, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China.
- Key Laboratory of Digital Technology in Medical Diagnostics of Zhejiang Province, Dian Diagnostics Group, Hangzhou, China.
| | - Shougang Guo
- Department of Neurology, Shandong Provincial Hospital, Shandong University, Jinan, China.
- Department of Neurology, Shandong Provincial HospitalAffiliated to, Shandong First Medical University , Jinan, China.
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17
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Zheng X, Zhang Y, Zhang L, Yang T, Zhang F, Wang X, Zhu SJ, Cui N, Lv H, Zhang X, Li H, Liu W. Taurolithocholic acid protects against viral haemorrhagic fever via inhibition of ferroptosis. Nat Microbiol 2024; 9:2583-2599. [PMID: 39294459 DOI: 10.1038/s41564-024-01801-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 07/31/2024] [Indexed: 09/20/2024]
Abstract
Bile acids are microbial metabolites that can impact infection of enteric and hepatitis viruses, but their functions during systemic viral infection remain unclear. Here we show that elevated levels of the secondary bile acid taurolithocholic acid (TLCA) are associated with reduced fatality rates and suppressed viraemia in patients infected with severe fever with thrombocytopenia syndrome virus (SFTSV), an emerging tick-borne haemorrhagic fever virus. TLCA inhibits viral replication and mitigates host inflammation during SFTSV infection in vitro, and indirectly suppresses SFTSV-mediated induction of ferroptosis by upregulating fatty acid desaturase 2 via the TGR5-PI3K/AKT-SREBP2 axis. High iron and ferritin serum levels during early infection were correlated with decreased TLCA levels and fatal outcomes in SFTSV-infected patients, indicating potential biomarkers. Furthermore, treatment with either ferroptosis inhibitors or TLCA protected mice from lethal SFTSV infection. Our findings highlight the therapeutic potential of bile acids to treat haemorrhagic fever viral infection.
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Affiliation(s)
- Xiaojie Zheng
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Yunfa Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Lingyu Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Tong Yang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Faxue Zhang
- School of Public Health, Wuhan University, Wuhan, People's Republic of China
| | - Xi Wang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
- Graduate School of Anhui Medical University, Hefei, People's Republic of China
| | - Shu Jeffrey Zhu
- Key Laboratory of Animal Virology of Ministry of Agriculture, Center for Veterinary Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Ning Cui
- The 154th Hospital, Xinyang, People's Republic of China
| | - Hongdi Lv
- The 154th Hospital, Xinyang, People's Republic of China
| | - Xiaoai Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Hao Li
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China.
- School of Public Health, Wuhan University, Wuhan, People's Republic of China.
- Graduate School of Anhui Medical University, Hefei, People's Republic of China.
| | - Wei Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China.
- School of Public Health, Wuhan University, Wuhan, People's Republic of China.
- Graduate School of Anhui Medical University, Hefei, People's Republic of China.
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18
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Yu C, Lin Y, Dai Y, Wu B, Qi Z, Qian X. Recent research advances in the development of Dabie Banda virus vaccines. PLoS Negl Trop Dis 2024; 18:e0012411. [PMID: 39207951 PMCID: PMC11361446 DOI: 10.1371/journal.pntd.0012411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is a newly identified tick-borne viral hemorrhagic fever caused by Dabie Banda virus (DBV). The virus was first discovered in eastern China in 2009 and is now considered an infectious disease with a mortality rate ranging from 6.3% to 30%. The best strategy for controlling SFTS is to develop effective vaccines. However, no approved vaccines are currently available to prevent this disease, despite the number of extensive and in-depth studies conducted on DBV in the past few years. This review focuses on the structure of DBV and the induced host immune responses which are the fundamental factors in vaccine development, and thoroughly summarizes the current research progress on DBV vaccines. The developing DBV vaccines include protein subunit vaccines, live attenuated vaccines, recombinant virus vector vaccines, and DNA vaccines. At present, almost all candidate vaccines for DBV are in the laboratory development or preclinical stages. There remain challenges in successfully developing clinically approved DBV vaccines.
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Affiliation(s)
- Chenyang Yu
- Department of Microbiology, Faculty of Naval Medicine, Naval Medical University, Shanghai, China
| | - Yuxiang Lin
- College of Basic Medical Sciences, Naval Medical University, Shanghai, China
| | - Yixin Dai
- Nursing Department, Faculty of Health and Wellness, Linxia Modern Career College, Gansu, China
| | - Bingan Wu
- Department of Microbiology, Faculty of Naval Medicine, Naval Medical University, Shanghai, China
| | - Zhongtian Qi
- Department of Microbiology, Faculty of Naval Medicine, Naval Medical University, Shanghai, China
| | - Xijing Qian
- Department of Microbiology, Faculty of Naval Medicine, Naval Medical University, Shanghai, China
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19
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Guan Z, Li H, Zhang C, Huang Z, Ye M, Zhang Y, Li S, Peng K. RVFV virulence factor NSs triggers the mitochondrial MCL-1-BAK axis to activate pathogenic NLRP3 pyroptosis. PLoS Pathog 2024; 20:e1012387. [PMID: 39213434 PMCID: PMC11364418 DOI: 10.1371/journal.ppat.1012387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 07/02/2024] [Indexed: 09/04/2024] Open
Abstract
Infection of Rift Valley fever virus (RVFV), a highly pathogenic mosquito-borne zoonotic virus, triggers severe inflammatory pathogenesis but the underlying mechanism of inflammation activation is currently unclear. Here, we report that the non-structural protein NSs of RVFV triggers mitochondrial damage to activate the NLRP3 inflammasome leading to viral pathogenesis in vivo. It is found that the host transcription inhibition effect of NSs causes rapid down-regulation of myeloid cell leukemia-1(MCL-1), a pro-survival member of the Bcl-2 (B-cell lymphoma protein 2) protein family. MCL-1 down-regulation led to BAK activation in the mitochondria, which triggered mtROS production and release of oxidized mitochondrial DNA (ox-mtDNA) into the cytosol. Cytosolic ox-mtDNA binds and activates the NLRP3 inflammasome triggering NLRP3-GSDMD pyroptosis in RVFV infected cells. A NSs mutant virus (RVFV-NSsRM) that is compromised in inducing transcription inhibition did not trigger MCL-1 down-regulation nor NLRP3-GSDMD pyroptosis. RVFV infection of the Nlrp3-/- mouse model demonstrated that the RVFV-triggered NLRP3 pyroptosis contributed to RVFV inflammatory pathogenesis and fatal infection in vivo. Infection with the RVFV-NSsRM mutant virus similarly showed alleviated inflammatory pathogenesis and reduced fatality rate. Taken together, these results revealed a mechanism by which a virulence factor activates the mitochondrial MCL-1-BAK axis through inducing host transcription inhibition to trigger NLRP3-dependent inflammatory pathogenesis.
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Affiliation(s)
- Zhenqiong Guan
- State Key Laboratory of Virology, Center for Antiviral Research, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Huiling Li
- State Key Laboratory of Virology, Center for Antiviral Research, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Chongtao Zhang
- State Key Laboratory of Virology, Center for Antiviral Research, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China
| | - Ziyan Huang
- State Key Laboratory of Virology, Center for Antiviral Research, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Meidi Ye
- State Key Laboratory of Virology, Center for Antiviral Research, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yulan Zhang
- State Key Laboratory of Virology, Center for Antiviral Research, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China
| | - Shufen Li
- State Key Laboratory of Virology, Center for Antiviral Research, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China
| | - Ke Peng
- State Key Laboratory of Virology, Center for Antiviral Research, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China
- University of Chinese Academy of Sciences, Beijing, China
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20
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Gal-Oz ST, Baysoy A, Vijaykumar B, Mostafavi S, Benoist C, Shay T. Microheterogeneity in the Kinetics and Sex-Specific Response to Type I IFN. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 213:96-104. [PMID: 38775402 PMCID: PMC11328978 DOI: 10.4049/jimmunol.2300453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 04/16/2024] [Indexed: 06/19/2024]
Abstract
The response to type I IFNs involves the rapid induction of prototypical IFN signature genes (ISGs). It is not known whether the tightly controlled ISG expression observed at the cell population level correctly represents the coherent responses of individual cells or whether it masks some heterogeneity in gene modules and/or responding cells. We performed a time-resolved single-cell analysis of the first 3 h after in vivo IFN stimulation in macrophages and CD4+ T and B lymphocytes from mice. All ISGs were generally induced in concert, with no clear cluster of faster- or slower-responding ISGs. Response kinetics differed between cell types: mostly homogeneous for macrophages, but with far more kinetic diversity among B and T lymphocytes, which included a distinct subset of nonresponsive cells. Velocity analysis confirmed the differences between macrophages in which the response progressed throughout the full 3 h, versus B and T lymphocytes in which it was rapidly curtailed by negative feedback and revealed differences in transcription rates between the lineages. In all cell types, female cells responded faster than their male counterparts. The ISG response thus seems to proceed as a homogeneous gene block, but with kinetics that vary between immune cell types and with sex differences that might underlie differential outcomes of viral infections.
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Affiliation(s)
- Shani T Gal-Oz
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Alev Baysoy
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA
| | - Brinda Vijaykumar
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA
| | - Sara Mostafavi
- Paul G. Allen School of Computer Science and Engineering, University of Washington, Seattle, WA
| | - Christophe Benoist
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA
| | - Tal Shay
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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21
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Ge HH, Cui N, Yin XH, Hu LF, Wang ZY, Yuan YM, Yue M, Lv HD, Wang Z, Zhang WW, Zhang L, Yuan L, Fan XJ, Yang X, Wu YX, Si GQ, Hu ZY, Li H, Zhang XA, Bao PT, Liu W. Effect of tocilizumab plus corticosteroid on clinical outcome in patients hospitalized with severe fever with thrombocytopenia syndrome: A randomized clinical trial. J Infect 2024; 89:106181. [PMID: 38744376 DOI: 10.1016/j.jinf.2024.106181] [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: 04/05/2024] [Revised: 05/08/2024] [Accepted: 05/08/2024] [Indexed: 05/16/2024]
Abstract
BACKGROUND Severe fever with thrombocytopenia syndrome (SFTS) is an emerging viral hemorrhagic fever with high fatality rates. The blockade of pro-inflammatory cytokines presents a promising therapeutic strategy. METHODS We conducted a randomized clinical trial at the 154th hospital, Xinyang, Henan Province. Eligible patients with severe SFTS disease were randomly assigned in a 1:2 ratio to receive either a single intravenous infusion of tocilizumab plus usual care; or usual care only. The primary outcome was the clinical status of death/survival at day 14, while secondary outcomes included improvement from baseline in liver and kidney damage and time required for hospital discharge. The efficacy of tocilizumab plus corticosteroid was compared to those receiving corticosteroid alone. The trial is registered with the Chinese Clinical Trial Registry website (ChiCTR2300076317). RESULTS 63 eligible patients were assigned to the tocilizumab group and 126 to the control group. The addition of tocilizumab to usual care was associated with a reduced death rate (9.5%) compared to those received only usual care (23.0%), with an adjusted hazard ratio (aHR) of 0.37 (95% confidence interval [CI], 0.15 to 0.91, P = 0.029). Combination therapy of tocilizumab and corticosteroids was associated with a significantly reduced fatality (aHR, 0.21; 95% CI, 0.08 to 0.56; P = 0.002) compared to those receiving corticosteroids alone. CONCLUSIONS A significant benefit of reducing fatality in severe SFTS patients was observed by using tocilizumab. A combined therapy of tocilizumab plus corticosteroids was recommended for the therapy of severe SFTS.
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Affiliation(s)
- Hong-Han Ge
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China; School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Ning Cui
- The 154th Hospital, Xinyang, China
| | - Xiao-Hong Yin
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China
| | - Li-Fen Hu
- Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | | | | | - Ming Yue
- Department of Infectious Diseases, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | | | | | | | | | - Lan Yuan
- The 154th Hospital, Xinyang, China
| | | | - Xin Yang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China
| | - Yong-Xiang Wu
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China
| | - Guang-Qian Si
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China; Senior Department of Pulmonary and Critical Care Medicine, The Eighth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Zhen-Yu Hu
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China; School of Public Health, Anhui Medical University, Hefei, China
| | - Hao Li
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China
| | - Xiao-Ai Zhang
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China
| | - Peng-Tao Bao
- Senior Department of Pulmonary and Critical Care Medicine, The Eighth Medical Center of Chinese PLA General Hospital, Beijing, China.
| | - Wei Liu
- State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China; Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, China; School of Public Health, Anhui Medical University, Hefei, China.
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22
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Shimojima M, Sugimoto S, Taniguchi S, Maeki T, Yoshikawa T, Kurosu T, Tajima S, Lim CK, Ebihara H. N-glycosylation of viral glycoprotein is a novel determinant for the tropism and virulence of highly pathogenic tick-borne bunyaviruses. PLoS Pathog 2024; 20:e1012348. [PMID: 39008518 PMCID: PMC11271937 DOI: 10.1371/journal.ppat.1012348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 07/25/2024] [Accepted: 06/17/2024] [Indexed: 07/17/2024] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) virus, a tick-borne bunyavirus, causes a severe/fatal disease termed SFTS; however, the viral virulence is not fully understood. The viral non-structural protein, NSs, is the sole known virulence factor. NSs disturbs host innate immune responses and an NSs-mutant SFTS virus causes no disease in an SFTS animal model. The present study reports a novel determinant of viral tropism as well as virulence in animal models, within the glycoprotein (GP) of SFTS virus and an SFTS-related tick-borne bunyavirus. Infection with mutant SFTS viruses lacking the N-linked glycosylation of GP resulted in negligible usage of calcium-dependent lectins in cells, less efficient infection, high susceptibility to a neutralizing antibody, low cytokine production in macrophage-like cells, and reduced virulence in Ifnar-/- mice, when compared with wildtype virus. Three SFTS virus-related bunyaviruses had N-glycosylation motifs at similar positions within their GP and a glycan-deficient mutant of Heartland virus showed in vitro and in vivo phenotypes like those of the SFTS virus. Thus, N-linked glycosylation of viral GP is a novel determinant for the tropism and virulence of SFTS virus and of a related virus. These findings will help us understand the process of severe/fatal diseases caused by tick-borne bunyaviruses.
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Affiliation(s)
- Masayuki Shimojima
- Department of Virology I, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Satoko Sugimoto
- Department of Virology I, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Satoshi Taniguchi
- Department of Virology I, National Institute of Infectious Diseases, Shinjuku, Tokyo, Japan
| | - Takahiro Maeki
- Department of Virology I, National Institute of Infectious Diseases, Shinjuku, Tokyo, Japan
| | - Tomoki Yoshikawa
- Department of Virology I, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Takeshi Kurosu
- Department of Virology I, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
| | - Shigeru Tajima
- Department of Virology I, National Institute of Infectious Diseases, Shinjuku, Tokyo, Japan
| | - Chang-Kweng Lim
- Department of Virology I, National Institute of Infectious Diseases, Shinjuku, Tokyo, Japan
| | - Hideki Ebihara
- Department of Virology I, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
- Department of Virology I, National Institute of Infectious Diseases, Shinjuku, Tokyo, Japan
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23
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Zhang S, Zhang N, Han J, Sun Z, Jiang H, Huang W, Kong D, Li Q, Ren Y, Zhao S, Jiang Y, Liu P. Dynamic immune status analysis of peripheral blood mononuclear cells in patients with Klebsiella pneumoniae bloodstream infection sepsis using single-cell RNA sequencing. Front Immunol 2024; 15:1380211. [PMID: 38898888 PMCID: PMC11185935 DOI: 10.3389/fimmu.2024.1380211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 04/16/2024] [Indexed: 06/21/2024] Open
Abstract
Background Klebsiella pneumoniae is a common Gram-negative bacterium. Blood infection caused by K. pneumoniae is one of the most common causes of human sepsis, which seriously threatens the life of patients. The immune status of peripheral blood mononuclear cells (PBMCs) based on single-cell RNA sequencing (scRNA-seq) in acute stage and recovery stage of sepsis caused by K. pneumoniae bloodstream infection has not been studied. Methods A total of 13 subjects were included in this study, 3 healthy controls, 7 patients with K. pneumoniae bloodstream infection in the acute stage (4 patients died), and 3 patients in the recovery stage. Peripheral blood of all patients was collected and PBMCs were isolated for scRNA-seq analysis. We studied the changes of PBMCs components, signaling pathways, differential genes, and cytokines in acute and recovery stages. Results During K. pneumoniae acute infection we observed a decrease in the proportion of T cells, most probably due to apoptosis and the function of T cell subtypes was disorder. The proportion of monocytes increased in acute stage. Although genes related to their phagocytosis function were upregulated, their antigen presentation capacity-associated genes were downregulated. The expression of IL-1β, IL-18, IFNGR1 and IFNGR2 genes was also increased in monocytes. The proportion of DCs was depleted during the acute stage and did not recover during sepsis recovery. DCs antigen presentation was weakened during the acute stage but recovered fast during the recovery stage. pDCs response to MCP-1 chemokine was weakened, they recovered it quickly during the recovery stage. B cells showed apoptosis both in the acute stage and recovery stage. Their response to complement was weakened, but their antigen presentation function was enhanced. The proportion of NK cells stable during all disease's stages, and the expression of IFN-γ gene was upregulated. Conclusion The proportion of PBMCs and their immune functions undergo variations throughout the course of the disease, spanning from the acute stage to recovery. These findings provide new insights into the mechanism of PBMCs immune function during K. pneumoniae bloodstream infection sepsis and recovery and sets the basis for further understanding and treatment.
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Affiliation(s)
- Shengwei Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
- Department of Clinical Laboratory, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Nan Zhang
- College of Mathematics, Jilin University, Changchun, China
| | - Jing Han
- Department of Clinical Laboratory, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Zeyu Sun
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Hua Jiang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Wenhua Huang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Decong Kong
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Qian Li
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Yuhao Ren
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Shishun Zhao
- College of Mathematics, Jilin University, Changchun, China
| | - Yongqiang Jiang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
| | - Peng Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
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24
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Wen S, Xu N, Zhao L, Yang L, Yang H, Chang C, Wang S, Qu C, Song L, Zou W, He Y, Wang G. Ruxolitinib plus standard of care in severe hospitalized adults with severe fever with thrombocytopenia syndrome (SFTS): an exploratory, single-arm trial. BMC Med 2024; 22:204. [PMID: 38764059 PMCID: PMC11103999 DOI: 10.1186/s12916-024-03421-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Accepted: 05/09/2024] [Indexed: 05/21/2024] Open
Abstract
BACKGROUND Severe fever with thrombocytopenia syndrome (SFTS) is an emerging tick-borne infectious disease, and its morbidity and mortality are increasing. At present, there is no specific therapy available. An exacerbated IFN-I response and cytokine storm are related to the mortality of patients with SFTS. Ruxolitinib is a Janus kinase (JAK) 1/2 inhibitor that can block proinflammatory cytokines and inhibit the type I IFN pathway. We aimed to explore the use of ruxolitinib plus standard of care for severe SFTS. METHODS We conducted a prospective, single-arm study of severe SFTS. We recruited participants aged 18 years or older who were admitted to the hospital with laboratory-confirmed severe SFTS and whose clinical score exceeded 8 points within 6 days of symptom onset. Participants received oral ruxolitinib (10 mg twice a day) for up to 10 days. The primary endpoint was 28-day overall survival. The secondary endpoints included the proportion of participants who needed intensive care unit (ICU) admission, total cost, changes in neurologic symptoms and clinical laboratory parameters, and adverse events (AEs) within 28 days. A historical control group (HC group, n = 26) who met the upper criteria for inclusion and hospitalized from April 1, 2021, to September 16, 2022, was selected and 1:1 matched for baseline characteristics by propensity score matching. RESULTS Between Sep 16, 2022, and Sep 16, 2023, 26 participants were recruited into the ruxolitinib treatment group (RUX group). The 28-day overall mortality was 7.7% in the RUX group and 46.2% in the HC group (P = 0.0017). There was a significantly lower proportion of ICU admissions (15.4% vs 65.4%, p < 0.001) and total hospitalization cost in the RUX group. Substantial improvements in neurologic symptoms, platelet counts, hyperferritinemia, and an absolute decrease in the serum SFTS viral load were observed in all surviving participants. Treatment-related adverse events were developed in 6 patients (23.2%) and worsened in 8 patients (30.8%), and no treatment-related serious adverse events were reported. CONCLUSIONS Our findings indicate that ruxolitinib has the potential to increase the likelihood of survival as well as reduce the proportion of ICU hospitalization and being tolerated in severe SFTS. Further trials are needed. TRAIL REGISTRATION ChiCTR2200063759, September 16, 2022.
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Affiliation(s)
- Sai Wen
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 Wenhuaxi Road, Jinan, 250012, Shandong Province, P. R. China
| | - Nannan Xu
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 Wenhuaxi Road, Jinan, 250012, Shandong Province, P. R. China
| | - Lianhui Zhao
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 Wenhuaxi Road, Jinan, 250012, Shandong Province, P. R. China
| | - Lulu Yang
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 Wenhuaxi Road, Jinan, 250012, Shandong Province, P. R. China
| | - Hui Yang
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 Wenhuaxi Road, Jinan, 250012, Shandong Province, P. R. China
| | - Caiyun Chang
- Jinan Center for Disease Control and Prevention, Jinan, 250021, Shandong, China
| | - Shanshan Wang
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 Wenhuaxi Road, Jinan, 250012, Shandong Province, P. R. China
| | - Chunmei Qu
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 Wenhuaxi Road, Jinan, 250012, Shandong Province, P. R. China
| | - Li Song
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 Wenhuaxi Road, Jinan, 250012, Shandong Province, P. R. China
| | - Wenlu Zou
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 Wenhuaxi Road, Jinan, 250012, Shandong Province, P. R. China
| | - Yishan He
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 Wenhuaxi Road, Jinan, 250012, Shandong Province, P. R. China
| | - Gang Wang
- Department of Infectious Disease, Qilu Hospital, Cheeloo College of Medicine, Shandong University, No. 107 Wenhuaxi Road, Jinan, 250012, Shandong Province, P. R. China.
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Liu Z, Zhao C, Yu H, Zhang R, Xue X, Jiang Z, Ge Z, Xu Y, Zhang W, Lin L, Chen Z. MCP-3 as a prognostic biomarker for severe fever with thrombocytopenia syndrome: a longitudinal cytokine profile study. Front Immunol 2024; 15:1379114. [PMID: 38812521 PMCID: PMC11134196 DOI: 10.3389/fimmu.2024.1379114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 04/22/2024] [Indexed: 05/31/2024] Open
Abstract
Introduction Severe fever with thrombocytopenia syndrome (SFTS) is characterized by a high mortality rate and is associated with immune dysregulation. Cytokine storms may play an important role in adverse disease regression, this study aimed to assess the validity of MCP-3 in predicting adverse outcomes in SFTS patients and to investigate the longitudinal cytokine profile in SFTS patients. Methods The prospective study was conducted at Yantai Qishan Hospital from May to November 2022. We collected clinical data and serial blood samples during hospitalization, patients with SFTS were divided into survival and non-survival groups based on the clinical prognosis. Results The levels of serum 48 cytokines were measured using Luminex assays. Compared to healthy controls, SFTS patients exhibited higher levels of most cytokines. The non-survival group had significantly higher levels of 32 cytokines compared to the survival group. Among these cytokines, MCP-3 was ranked as the most significant variable by the random forest (RF) model in predicting the poor prognosis of SFTS patients. Additionally, we validated the predictive effects of MCP-3 through receiver operating characteristic (ROC) curve analysis with an AUC of 0.882 (95% CI, 0.787-0.978, P <0.001), and the clinical applicability of MCP-3 was assessed favorably based on decision curve analysis (DCA). The Spearman correlation analysis indicated that the level of MCP-3 was positively correlated with ALT, AST, LDH, α-HBDH, APTT, D-dimer, and viral load (P<0.01). Discussion For the first time, our study identified and validated that MCP-3 could serve as a meaningful biomarker for predicting the fatal outcome of SFTS patients. The longitudinal cytokine profile analyzed that abnormally increased cytokines were associated with the poor prognosis of SFTS patients. Our study provides new insights into exploring the pathogenesis of cytokines with organ damage and leading to adverse effects.
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Affiliation(s)
- Zishuai Liu
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Chenxi Zhao
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Hong Yu
- Department of Infectious Diseases, Yantai Qishan Hospital, Yantai, Shandong, China
| | - Rongling Zhang
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Xiaoyu Xue
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Zhouling Jiang
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Ziruo Ge
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Yanli Xu
- Department of Infectious Diseases, Yantai Qishan Hospital, Yantai, Shandong, China
| | - Wei Zhang
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Ling Lin
- Department of Infectious Diseases, Yantai Qishan Hospital, Yantai, Shandong, China
| | - Zhihai Chen
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China
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26
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Niu Y, Liu Y, Huang L, Liu W, Cheng Q, Liu T, Ning Q, Chen T. Antiviral immunity of severe fever with thrombocytopenia syndrome: current understanding and implications for clinical treatment. Front Immunol 2024; 15:1348836. [PMID: 38646523 PMCID: PMC11026560 DOI: 10.3389/fimmu.2024.1348836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 03/21/2024] [Indexed: 04/23/2024] Open
Abstract
Dabie Banda virus (DBV), a tick-borne pathogen, was first identified in China in 2009 and causes profound symptoms including fever, leukopenia, thrombocytopenia and multi-organ dysfunction, which is known as severe fever with thrombocytopenia syndrome (SFTS). In the last decade, global incidence and mortality of SFTS increased significantly, especially in East Asia. Though previous studies provide understandings of clinical and immunological characteristics of SFTS development, comprehensive insight of antiviral immunity response is still lacking. Here, we intensively discuss the antiviral immune response after DBV infection by integrating previous ex- and in-vivo studies, including innate and adaptive immune responses, anti-viral immune responses and long-term immune characters. A comprehensive overview of potential immune targets for clinical trials is provided as well. However, development of novel strategies for improving the prognosis of the disease remains on challenge. The current review may shed light on the establishment of immunological interventions for the critical disease SFTS.
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Affiliation(s)
| | | | | | | | | | | | - Qin Ning
- Department of Infectious Diseases, Tongji Hospital, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonostic Infectious Disease, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Tao Chen
- Department of Infectious Diseases, Tongji Hospital, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonostic Infectious Disease, Huazhong University of Science and Technology, Wuhan, Hubei, China
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27
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Ji M, Hu J, Zhang D, Huang B, Xu S, Jiang N, Chen Y, Wang Y, Wu X, Wu Z. Inhibition of SFTSV replication in humanized mice by a subcutaneously administered anti-PD1 nanobody. EMBO Mol Med 2024; 16:575-595. [PMID: 38366162 PMCID: PMC10940662 DOI: 10.1038/s44321-024-00026-0] [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: 09/04/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 02/18/2024] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is a life-threatening disease caused by a novel bunyavirus (SFTSV), mainly transmitted by ticks. With no effective therapies or vaccines available, understanding the disease's mechanisms is crucial. Recent studies found increased expression of programmed cell death-1 (PD-1) on dysfunctional T cells in SFTS patients. However, the role of the PD-1/programmed cell death-ligand 1 (PD-L1) pathway in SFTS progression remains unclear. We investigated PD-1 blockade as a potential therapeutic strategy against SFTSV replication. Our study analyzed clinical samples and performed in vitro experiments, revealing elevated PD-1/PD-L1 expression in various immune cells following SFTSV infection. An anti-PD-1 nanobody, NbP45, effectively inhibited SFTSV infection in peripheral blood mononuclear cells (PBMCs), potentially achieved through the mitigation of apoptosis and the augmentation of T lymphocyte proliferation. Intriguingly, subcutaneous administration of NbP45 showed superior efficacy compared to a licensed anti-PD-1 antibody in an SFTSV-infected humanized mouse model. These findings highlight the involvement of the PD-1/PD-L1 pathway during acute SFTSV infection and suggest its potential as a host target for immunotherapy interventions against SFTSV infection.
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Affiliation(s)
- Mengmeng Ji
- School of Life Sciences, Ningxia University, Yinchuan, China
| | - Jiaqian Hu
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China
| | - Doudou Zhang
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China
| | - Bilian Huang
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China
| | - Shijie Xu
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China
- Y-Clone Medical Science Co. Ltd., Suzhou, China
| | - Na Jiang
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China
| | - Yuxin Chen
- Department of Laboratory Medicine, Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China.
| | - Yujiong Wang
- School of Life Sciences, Ningxia University, Yinchuan, China.
| | - Xilin Wu
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China.
- Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China.
| | - Zhiwei Wu
- School of Life Sciences, Ningxia University, Yinchuan, China.
- Center for Public Health Research, Medical School, Nanjing University, Nanjing, China.
- Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, Nanjing, China.
- State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing, China.
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28
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Liu Z, Jiang Z, Zhang L, Xue X, Zhao C, Xu Y, Zhang W, Lin L, Chen Z. A model based on meta-analysis to evaluate poor prognosis of patients with severe fever with thrombocytopenia syndrome. Front Microbiol 2024; 14:1307960. [PMID: 38260897 PMCID: PMC10801726 DOI: 10.3389/fmicb.2023.1307960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 12/15/2023] [Indexed: 01/24/2024] Open
Abstract
Background Early identification of risk factors associated with poor prognosis in Severe fever with thrombocytopenia syndrome (SFTS) patients is crucial to improving patient survival. Method Retrieve literature related to fatal risk factors in SFTS patients in the database, extract the risk factors and corresponding RRs and 95% CIs, and merge them. Statistically significant factors were included in the model, and stratified and assigned a corresponding score. Finally, a validation cohort from Yantai Qishan Hospital in 2021 was used to verify its predictive ability. Result A total of 24 articles were included in the meta-analysis. The model includes six risk factors: age, hemorrhagic manifestations, encephalopathy, Scr and BUN. The analysis of lasso regression and multivariate logistic regression shows that model score is an independent risk factor (OR = 1.032, 95% CI 1.002-1.063, p = 0.034). The model had an area under the curve (AUC) of 0.779 (95% CI 0.669-0.889, P<0.001). The validation cohort was divided into four risk groups with cut-off values. Compared with the low-medium risk group, the mortality rate of high-risk and very high-risk patients was more significant (RR =5.677, 95% CI 4.961-6.496, P<0.001). Conclusion The prediction model for the fatal outcome of SFTS patients has shown positive outcomes.Systematic review registration:https://www.crd.york.ac.uk/prospero/ (CRD42023453157).
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Affiliation(s)
- Zishuai Liu
- Department of Infectious Disease, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Zhouling Jiang
- Department of Infectious Disease, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Ligang Zhang
- Department of Infectious Diseases, Yantai Qishan Hospital, Yantai, China
| | - Xiaoyu Xue
- Department of Infectious Disease, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Chenxi Zhao
- Department of Infectious Disease, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Yanli Xu
- Department of Infectious Diseases, Yantai Qishan Hospital, Yantai, China
| | - Wei Zhang
- Department of Infectious Disease, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Ling Lin
- Department of Infectious Diseases, Yantai Qishan Hospital, Yantai, China
| | - Zhihai Chen
- Department of Infectious Disease, Beijing Ditan Hospital, Capital Medical University, Beijing, China
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Zhang L, Peng X, Wang Q, Li J, Lv S, Han S, Zhang L, Ding H, Wang CY, Xiao G, Du X, Peng K, Li H, Liu W. CCR2 is a host entry receptor for severe fever with thrombocytopenia syndrome virus. SCIENCE ADVANCES 2023; 9:eadg6856. [PMID: 37531422 PMCID: PMC10396298 DOI: 10.1126/sciadv.adg6856] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 06/30/2023] [Indexed: 08/04/2023]
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is an emerging tick-borne bunyavirus causing a high fatality rate of up to 30%. To date, the receptor mediating SFTSV entry remained uncharacterized, hindering the understanding of disease pathogenesis. Here, C-C motif chemokine receptor 2 (CCR2) was identified as a host receptor for SFTSV based on a genome-wide CRISPR-Cas9 screen. Knockout of CCR2 substantially reduced viral binding and infection. CCR2 enhanced SFTSV binding through direct binding to SFTSV glycoprotein N (Gn), which is mediated by its N-terminal extracellular domain. Depletion of CCR2 in C57BL/6J mouse model attenuated SFTSV replication and pathogenesis. The peripheral blood primary monocytes from elderly individuals or subjects with underlying diabetes mellitus showed higher CCR2 surface expression and supported stronger binding and replication of SFTSV. Together, these data indicate that CCR2 is a host entry receptor for SFTSV infection and a novel target for developing anti-SFTSV therapeutics.
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Affiliation(s)
- Leike Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
- Hubei Jiangxia Laboratory, Wuhan, Hubei 430200, China
| | - Xuefang Peng
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Qingxing Wang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
| | - Jin Li
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Shouming Lv
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Shuo Han
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Lingyu Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Heng Ding
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Cong-Yi Wang
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430040, China
| | - Gengfu Xiao
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
| | - Xuguang Du
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Ke Peng
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
| | - Hao Li
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
- School of Public Health, Wuhan University, Wuhan, Hubei 430071, China
| | - Wei Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
- School of Public Health, Wuhan University, Wuhan, Hubei 430071, China
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Yu S, Zhang Q, Su L, He J, Shi W, Yan H, Mao H, Sun Y, Cheng D, Wang X, Zhang Y, Fang L. Dabie bandavirus infection induces macrophagic pyroptosis and this process is attenuated by platelets. PLoS Negl Trop Dis 2023; 17:e0011488. [PMID: 37486928 PMCID: PMC10399884 DOI: 10.1371/journal.pntd.0011488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 06/29/2023] [Indexed: 07/26/2023] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging tick-borne infection with a high mortality rate in humans, which is caused by Dabie bandavirus (DBV), formerly known as SFTS virus. Clinical manifestations of SFTS are characterized by high fever, thrombocytopenia, leukopenia, hemorrhage, gastrointestinal symptoms, myalgia and local lymph node enlargement with up to 30% case fatality rates in human. Macrophage depletion in secondary lymphoid organs have important roles in the pathogenic process of fatal SFTS, but its exact cell death mechanism remains largely unknown. Here, we showed for the first time that DBV infection induced macrophagic pyroptosis, as evidenced by swollen cells, pore-forming structures, accumulation of gasdermin D N-terminal (GSDMD-NT) as well as the release of lactate dehydrogenase (LDH) and IL-1β in human macrophages. In addition to the upregulation of pyronecrosis genes, the expressions of pyroptosis-related proteins (GSDMD, caspase-1 and IL-1β) were also elevated. To be noted, platelets were found to play a protective role in DBV-derived pyroptosis. Transcriptome analysis and in vitro studies demonstrated that platelets significantly reduced the gene expressions and protein production of pro-pyroptotic markers and inflammatory cytokines in macrophages, whereas platelets conferred a propagation advantage for DBV. Collectively, this study demonstrates a novel mechanism by which DBV invasion triggers pyroptosis as a host defense to remove replication niches in human macrophages and platelets provide an additional layer to reduce cellular death. These findings may have important implications to the pathogenesis of lethal DBV, and provide new ideas for developing novel therapeutics to combat its infection.
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Affiliation(s)
- Sicong Yu
- Department of Critical Care Medicine, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
- The First People's Hospital of Xiaoshan District, Hangzhou, China
| | - Qinyi Zhang
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Lingxuan Su
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Ji He
- Blood Center of Zhejiang Province, Hangzhou, China
| | - Wen Shi
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Hao Yan
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Haiyan Mao
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Yi Sun
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Dongqing Cheng
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xuan Wang
- Shaoxing Shangyu District Center for Disease Control and Prevention, Shaoxing, China
| | - Yanjun Zhang
- Department of Microbiology, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
| | - Lei Fang
- Department of Critical Care Medicine, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China
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Sirgi Y, Stanojevic M, Ahn J, Yazigi N, Kaufman S, Khan K, Vitola B, Matsumoto C, Kroemer A, Fishbein T, Ekong UD. COVID-19 Disease in Pediatric Solid Organ Transplantation from Alpha to Omicron: A High Monocyte Count in the Preceding Three Months Portends a Risk for Severe Disease. Viruses 2023; 15:1559. [PMID: 37515245 PMCID: PMC10383409 DOI: 10.3390/v15071559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/12/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
IMPORTANCE Planning for future resurgences in SARS-CoV-2 infection is necessary for providers who care for immunocompromised patients. OBJECTIVE to determine factors associated with COVID-19 disease severity in immunosuppressed children. DESIGN a case series of children with solid organ transplants diagnosed with SARS-CoV-2 infection between 15 March 2020 and 31 March 2023. SETTING a single pediatric transplant center. PARTICIPANTS all children with a composite transplant (liver, pancreas, intestine), isolated intestine transplant (IT), isolated liver transplant LT), or simultaneous liver kidney transplant (SLK) with a positive PCR for SARS-CoV-2. EXPOSURE SARS-CoV-2 infection. MAIN OUTCOME AND MEASURES We hypothesized that children on the most immunosuppression, defined by the number of immunosuppressive medications and usage of steroids, would have the most severe disease course and that differential white blood cell count in the months preceding infection would be associated with likelihood of having severe disease. The hypothesis being tested was formulated during data collection. The primary study outcome measurement was disease severity defined using WHO criteria. RESULTS 77 children (50 LT, 24 intestine, 3 SLK) were infected with SARS-CoV-2, 57.4 months from transplant (IQR 19.7-87.2). 17% were ≤1 year post transplant at infection. 55% were male, 58% were symptomatic and ~29% had severe disease. A high absolute lymphocyte count at diagnosis decreased the odds of having severe COVID-19 disease (OR 0.29; CI 0.11-0.60; p = 0.004). Conversely, patients with a high absolute monocyte count in the three months preceding infection had increased odds of having severe disease (OR 30.49; CI 1.68-1027.77; p = 0.033). Steroid use, higher tacrolimus level, and number of immunosuppressive medications at infection did not increase the odds of having severe disease. CONCLUSIONS AND RELEVANCE The significance of a high monocyte count as predictor of severe disease potentially confirms the importance of monocytic inflammasome-driven inflammation in COVID-19 pathogenesis. Our data do not support reducing immunosuppression in the setting of infection. Our observations may have important ramifications in resource management as vaccine- and infection-induced immunity wanes.
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Affiliation(s)
- Yasmina Sirgi
- Department of Surgery, Georgetown University Medical School, Washington, DC 20007, USA
| | - Maja Stanojevic
- Department of Pediatrics, MedStar Georgetown University Hospital, Washington, DC 20007, USA
| | - Jaeil Ahn
- Department of Biostatistics, Bioinformatics, and Biomathematics, Georgetown University, Washington, DC 20007, USA
| | - Nada Yazigi
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC 20007, USA
| | - Stuart Kaufman
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC 20007, USA
| | - Khalid Khan
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC 20007, USA
| | - Bernadette Vitola
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC 20007, USA
| | - Cal Matsumoto
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC 20007, USA
| | - Alexander Kroemer
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC 20007, USA
| | - Thomas Fishbein
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC 20007, USA
| | - Udeme D Ekong
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC 20007, USA
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Quan C, Liu Q, Yu L, Li C, Nie K, Ding G, Zhou H, Wang X, Sun W, Wang H, Yue M, Wei L, Zheng W, Lyu Q, Xing W, Zhang Z, Carr MJ, Zhang H, Shi W. SFTSV infection is associated with transient overproliferation of monoclonal lambda-type plasma cells. iScience 2023; 26:106799. [PMID: 37250798 PMCID: PMC10212991 DOI: 10.1016/j.isci.2023.106799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 04/07/2023] [Accepted: 04/28/2023] [Indexed: 05/31/2023] Open
Abstract
The impairment of antibody-mediated immunity is a major factor associated with fatal cases of severe fever with thrombocytopenia syndrome (SFTS). By collating the clinical diagnosis reports of 30 SFTS cases, we discovered the overproliferation of monoclonal plasma cells (MCP cells, CD38+cLambda+cKappa-) in bone marrow, which has only been reported previously in multiple myeloma. The ratio of CD38+cLambda+ versus CD38+cKappa+ in SFTS cases with MCP cells was significantly higher than that in normal cases. MCP cells presented transient expression in the bone marrow, which was distinctly different from multiple myeloma. Moreover, the SFTS patients with MCP cells had higher clinical severity. Further, the overproliferation of MCP cells was also observed in SFTS virus (SFTSV)-infected mice with lethal infectious doses. Together, SFTSV infection induces transient overproliferation of monoclonal lambda-type plasma cells, which have important implications for the study of SFTSV pathogenesis, prognosis, and the rational development of therapeutics.
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Affiliation(s)
- Chuansong Quan
- Department of Infectious Disease, The Second Affiliated Hospital of Shandong First Medical University, Taian 271000, China
- Key Laboratory of Emerging Infectious Diseases in Universities of Shandong, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271000, China
| | - Qinghua Liu
- Department of Clinical Laboratory, The Second Affiliated Hospital of Shandong First Medical University, Taian 271000, China
| | - Lijuan Yu
- Key Laboratory of Emerging Infectious Diseases in Universities of Shandong, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271000, China
| | - Chunjing Li
- Department of Hematology, The Second Affiliated Hospital of Shandong First Medical University, Taian 271000, China
| | - Kaixiao Nie
- Key Laboratory of Emerging Infectious Diseases in Universities of Shandong, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271000, China
| | - Guoyong Ding
- School of Public Health, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji’nan 250117, China
| | - Hong Zhou
- Key Laboratory of Emerging Infectious Diseases in Universities of Shandong, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271000, China
| | - Xinli Wang
- Department of Pathology, The Second Affiliated Hospital of Shandong First Medical University, Taian 271000, China
| | - Wenwen Sun
- Department of Pathology, The Second Affiliated Hospital of Shandong First Medical University, Taian 271000, China
| | - Huiliang Wang
- Department of Infectious Disease, The Second Affiliated Hospital of Shandong First Medical University, Taian 271000, China
| | - Maokui Yue
- Department of Critical Care Medicine, The Second Affiliated Hospital of Shandong First Medical University, Taian 271000, China
| | - Li Wei
- Department of Respiratory Medicine, The Second Affiliated Hospital of Shandong First Medical University, Taian 271000, China
| | - Wenjun Zheng
- Key Laboratory of Emerging Infectious Diseases in Universities of Shandong, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271000, China
| | - Qiang Lyu
- School of Public Health, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji’nan 250117, China
| | - Weijia Xing
- School of Public Health, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji’nan 250117, China
| | - Zhenjie Zhang
- Key Laboratory of Emerging Infectious Diseases in Universities of Shandong, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271000, China
| | - Michael J. Carr
- National Virus Reference Laboratory, School of Medicine, University College Dublin, Dublin 4, Ireland
- International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, N20 W10 Kita-ku, Sapporo 001-0020, Japan
| | - Hong Zhang
- Department of Infectious Disease, The Second Affiliated Hospital of Shandong First Medical University, Taian 271000, China
- Department of Hematology, The Second Affiliated Hospital of Shandong First Medical University, Taian 271000, China
| | - Weifeng Shi
- Key Laboratory of Emerging Infectious Diseases in Universities of Shandong, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271000, China
- School of Public Health, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji’nan 250117, China
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33
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Huang M, Wang T, Huang Y, Wang Y, Wu S, Wang F, Tang G, Wei W, Liu W, Hou H. The clinical and immunological characteristics in fatal severe fever with thrombocytopenia syndrome virus (SFTSV) infection. Clin Immunol 2023; 248:109262. [PMID: 36796470 DOI: 10.1016/j.clim.2023.109262] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 02/06/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023]
Abstract
OBJECTIVE This study aimed to make a comprehensive evaluation of peripheral immune profiles for further understanding the immunopathogenesis of severe fever with thrombocytopenia syndrome (SFTS). METHODS Forty-seven patients with SFTS virus infection were included, of which 24 were deceased. The percentages, absolute numbers, phenotype of lymphocyte subsets were detected by flow cytometry. RESULTS In patients with SFTS, the numbers of CD3+T, CD4+T, CD8+T and NKT cells were decreased compared with healthy controls (HCs), accompanied with highly active and exhausted phenotypes for T cells, and overproliferating plasmablasts. High inflammatory status, dysregulation of coagulation and host immune response were more obvious in deceased patients than that of survivors. Higher levels of PCT, IL-6, IL-10, TNF-α, APTT, TT and the occurrence of hemophagocytic lymphohistiocytosis were poor prognostic indicators of SFTS. CONCLUSIONS The evaluation of immunological markers in combination with laboratory tests has critical value for selecting prognostic markers and potential treatment target.
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Affiliation(s)
- Ming Huang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ting Wang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yi Huang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yun Wang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shiji Wu
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Feng Wang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Guoxing Tang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Wei
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Weiyong Liu
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Hongyan Hou
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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34
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Li YH, Huang WW, He WQ, He XY, Wang XH, Lin YL, Zhao ZJ, Zheng YT, Pang W. Longitudinal analysis of immunocyte responses and inflammatory cytokine profiles in SFTSV-infected rhesus macaques. Front Immunol 2023; 14:1143796. [PMID: 37033979 PMCID: PMC10073517 DOI: 10.3389/fimmu.2023.1143796] [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: 01/13/2023] [Accepted: 03/10/2023] [Indexed: 04/11/2023] Open
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV), an emerging bunyavirus, causes severe fever with thrombocytopenia syndrome (SFTS), with a high fatality rate of 20%-30%. At present, however, the pathogenesis of SFTSV remains largely unclear and no specific therapeutics or vaccines against its infection are currently available. Therefore, animal models that can faithfully recapitulate human disease are important to help understand and treat SFTSV infection. Here, we infected seven Chinese rhesus macaques (Macaca mulatta) with SFTSV. Virological and immunological changes were monitored over 28 days post-infection. Results showed that mild symptoms appeared in the macaques, including slight fever, thrombocytopenia, leukocytopenia, increased aspartate aminotransferase (AST) and creatine kinase (CK) in the blood. Viral replication was persistently detectable in lymphoid tissues and bone marrow even after viremia disappeared. Immunocyte detection showed that the number of T cells (mainly CD8+ T cells), B cells, natural killer (NK) cells, and monocytes decreased during infection. In detail, effector memory CD8+ T cells declined but showed increased activation, while both the number and activation of effector memory CD4+ T cells increased significantly. Furthermore, activated memory B cells decreased, while CD80+/CD86+ B cells and resting memory B cells (CD27+CD21+) increased significantly. Intermediate monocytes (CD14+CD16+) increased, while myeloid dendritic cells (mDCs) rather than plasmacytoid dendritic cells (pDCs) markedly declined during early infection. Cytokines, including interleukin-6 (IL-6), interferon-inducible protein-10 (IP-10), and macrophage inflammatory protein 1 (MCP-1), were substantially elevated in blood and were correlated with activated CD4+ T cells, B cells, CD16+CD56+ NK cells, CD14+CD16+ monocytes during infection. Thus, this study demonstrates that Chinese rhesus macaques infected with SFTSV resemble mild clinical symptoms of human SFTS and provides detailed virological and immunological parameters in macaques for understanding the pathogenesis of SFTSV infection.
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Affiliation(s)
- Yi-Hui Li
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology - The Chinese University of Hong Kong (KIZ-CUHK) Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Wen-Wu Huang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology - The Chinese University of Hong Kong (KIZ-CUHK) Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
- Office of Science and Technology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Wen-Qiang He
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology - The Chinese University of Hong Kong (KIZ-CUHK) Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Xiao-Yan He
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology - The Chinese University of Hong Kong (KIZ-CUHK) Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Xue-Hui Wang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology - The Chinese University of Hong Kong (KIZ-CUHK) Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China
| | - Ya-Long Lin
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology - The Chinese University of Hong Kong (KIZ-CUHK) Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Zu-Jiang Zhao
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology - The Chinese University of Hong Kong (KIZ-CUHK) Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Yong-Tang Zheng
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology - The Chinese University of Hong Kong (KIZ-CUHK) Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
- *Correspondence: Yong-Tang Zheng, ; Wei Pang,
| | - Wei Pang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology - The Chinese University of Hong Kong (KIZ-CUHK) Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
- *Correspondence: Yong-Tang Zheng, ; Wei Pang,
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35
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Zong L, Yang F, Liu S, Gao Y, Xia F, Zheng M, Xu Y. CD8 + T cells mediate antiviral response in severe fever with thrombocytopenia syndrome. FASEB J 2023; 37:e22722. [PMID: 36571509 DOI: 10.1096/fj.202201343rr] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 11/30/2022] [Accepted: 12/08/2022] [Indexed: 12/27/2022]
Abstract
Severe fever with thrombocytopenia syndrome (SFTS), which is caused by a novel Bunyavirus, has gradually become a threatening infectious disease in rural areas of Asia. Studies have identified a severe cytokine storm and impaired humoral immune response in SFTS. However, the cellular immune response to SFTS virus (SFTSV) infection remains largely unknown. Here we report that SFTS patients had a cytokine storm accompanied by high levels of chemokines. CD8+ T cells in peripheral blood mononuclear cells of SFTS patients exhibited a more activated phenotype and enhanced the antiviral responses. They increased the expression of CD69 and CD25, secreted a higher level of IFN-γ and granzyme, and had a stronger proliferative ability than in healthy controls. In convalescent SFTS patients, the expression of CD69 and CD25 on CD8+ T cells was reduced. In addition, we found the ratio and cellularity of CD14+ CD16+ intermediate monocytes were increased in peripheral blood of SFTS patients. Both the expression of C-X-C motif chemokine ligand 10 (CXCL10) on CD14+ CD16+ intermediate monocytes and the expression of C-X-C motif chemokine receptor 3 (CXCR3) on CD8+ T cells increased dramatically in SFTS patients. Our studies reveal a potential pathway that CD8+ T cells rapidly activate and are mostly recruited by intermediate monocytes through CXCL10 in SFTSV infection. Our results may be of clinical relevance for further treatment and discharge instructions in SFTSV infections.
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Affiliation(s)
- Lu Zong
- Department of Clinical Laboratory, First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Fan Yang
- Department of Clinical Laboratory, First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Siyu Liu
- Department of Clinical Laboratory, First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yufeng Gao
- Department of Infectious Diseases, First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Fang Xia
- Department of Clinical Laboratory, People's Hospital of Hanshan County, Maanshan, China
| | - Meijuan Zheng
- Department of Clinical Laboratory, First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yuanhong Xu
- Department of Clinical Laboratory, First Affiliated Hospital of Anhui Medical University, Hefei, China
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36
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Xie J, Li H, Zhang X, Yang T, Yue M, Zhang Y, Chen S, Cui N, Yuan C, Li J, Zhu SJ, Liu W. Akkermansia muciniphila protects mice against an emerging tick-borne viral pathogen. Nat Microbiol 2023; 8:91-106. [PMID: 36604506 DOI: 10.1038/s41564-022-01279-6] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 10/26/2022] [Indexed: 01/07/2023]
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging tick-borne disease caused by a phlebovirus in the Bunyaviridae family. Infection can result in systemic inflammatory response syndrome with a high fatality rate, and there are currently no treatments or vaccines available. The microbiota has been implicated in host susceptibility to systemic viral infection and disease outcomes, but whether the gut microbiota is implicated in severe fever with thrombocytopenia syndrome virus (SFTSV) infection is unknown. Here, we analysed faecal and serum samples from patients with SFTS using 16S ribosomal RNA-sequencing and untargeted metabolomics, respectively. We found that the gut commensal Akkermansia muciniphila increased in relative abundance over the course of infection and was reduced in samples from deceased patients. Using germ-free or oral antibiotic-treated mice, we found that A. muciniphila produces the β-carboline alkaloid harmaline, which protects against SFTSV infection by suppressing NF-κB-mediated systemic inflammation. Harmaline indirectly modulated the virus-induced inflammatory response by specifically enhancing bile acid-CoA: amino acid N-acyltransferase expression in hepatic cells to increase conjugated primary bile acids, glycochenodeoxycholic acid and taurochenodeoxycholic acid. These bile acids induced transmembrane G-protein coupled receptor-5-dependent anti-inflammatory responses. These results indicate the probiotic potential of A. muciniphila in mitigating SFTSV infection.
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Affiliation(s)
- Jinyan Xie
- Key Laboratory of Animal Virology of Ministry of Agriculture, Center for Veterinary Sciences, Zhejiang University, Hangzhou, P. R. China
| | - Hao Li
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, P. R. China
| | - Xiaoai Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, P. R. China
| | - Tong Yang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, P. R. China
| | - Mengjia Yue
- Key Laboratory of Animal Virology of Ministry of Agriculture, Center for Veterinary Sciences, Zhejiang University, Hangzhou, P. R. China
| | - Yunfa Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, P. R. China
| | - Shuxian Chen
- Key Laboratory of Animal Virology of Ministry of Agriculture, Center for Veterinary Sciences, Zhejiang University, Hangzhou, P. R. China
| | - Ning Cui
- The 990 Hospital, People's Liberation Army, Xinyang, P. R. China
| | - Chun Yuan
- The 990 Hospital, People's Liberation Army, Xinyang, P. R. China
| | - Jingyun Li
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, P. R. China
| | - Shu Jeffrey Zhu
- Key Laboratory of Animal Virology of Ministry of Agriculture, Center for Veterinary Sciences, Zhejiang University, Hangzhou, P. R. China.
- Department of Critical Care Medicine, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, P. R. China.
| | - Wei Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, P. R. China.
- School of Public Health, Peking University, Beijing, P. R. China.
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37
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Ruxolitinib for severe fever with thrombocytopenia syndrome (SFTS). Heliyon 2022; 8:e12462. [PMID: 36590553 PMCID: PMC9798169 DOI: 10.1016/j.heliyon.2022.e12462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 11/10/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease with high mortality. A 73-year-old woman presented to the hospital with fever after being bitten by ticks and was diagnosed with SFTS. Three days after treatment with high-flow oxygen and supportive therapy, her condition deteriorated to septic shock and multiple organ failure. Ruxolitinib, a JAK1/2 inhibitor, was used for the treatment of cytokine release syndrome, and the patient finally recovered. Ruxolitinib and other host-based immunomodulatory drugs may be potential treatments for fatal SFTS.
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38
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Dai ZN, Peng XF, Li JC, Zhao J, Wu YX, Yang X, Yang T, Zhang SF, Dai K, Guan XG, Yuan C, Yang ZD, Cui N, Lu QB, Huang Y, Fan H, Zhang XA, Xiao GF, Peng K, Zhang LK, Liu W, Li H. Effect of genomic variations in severe fever with thrombocytopenia syndrome virus on the disease lethality. Emerg Microbes Infect 2022; 11:1672-1682. [PMID: 35603493 PMCID: PMC9225783 DOI: 10.1080/22221751.2022.2081617] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV), an emerging tick-borne bunyavirus, causes mild-to-moderate infection to critical illness or even death in human patients. The effect of virus variations on virulence and related clinical significance is unclear. We prospectively recruited SFTSV-infected patients in a hotspot region of SFTS endemic in China from 2011 to 2020, sequenced whole genome of SFTSV, and assessed the association of virus genomic variants with clinical data, viremia, and inflammatory response. We identified seven viral clades (I-VII) based on phylogenetic characterization of 805 SFTSV genome sequences. A significantly increased case fatality rate (32.9%) was revealed in one unique clade (IV) that possesses a specific co-mutation pattern, compared to other three common clades (I, 16.7%; II, 13.8%; and III, 11.8%). The phenotype-genotype association (hazard ratios ranged 1.327-2.916) was confirmed by multivariate regression adjusting age, sex, and hospitalization delay. We revealed a pronounced inflammation response featured by more production of CXCL9, IL-10, IL-6, IP-10, M-CSF, and IL-1β, in clade IV, which was also related to severe complications. We observed enhanced cytokine expression from clade IV inoculated PBMCs and infected mice. Moreover, the neutralization activity of convalescent serum from patients infected with one specified clade was remarkably reduced to other viral clades. Together, our findings revealed a significant association between one specific viral clade and SFTS fatality, highlighting the need for molecular surveillance for highly lethal strains in endemic regions and unravelled the importance of evaluating cross-clade effect in development of vaccines and therapeutics.
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Affiliation(s)
- Zi-Niu Dai
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China.,College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, People's Republic of China
| | - Xue-Fang Peng
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Jia-Chen Li
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Jing Zhao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Yong-Xiang Wu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Xin Yang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Tong Yang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Shao-Fei Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Ke Dai
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Xiu-Gang Guan
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Chun Yuan
- The People's Liberation Army 990 Hospital, Xinyang, People's Republic of China
| | - Zhen-Dong Yang
- The People's Liberation Army 990 Hospital, Xinyang, People's Republic of China
| | - Ning Cui
- The People's Liberation Army 990 Hospital, Xinyang, People's Republic of China
| | - Qing-Bin Lu
- School of Public Health, Peking University, Beijing, People's Republic of China
| | - Yong Huang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Hang Fan
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Xiao-Ai Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Geng-Fu Xiao
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, People's Republic of China
| | - Ke Peng
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, People's Republic of China
| | - Lei-Ke Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, People's Republic of China
| | - Wei Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China.,College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, People's Republic of China
| | - Hao Li
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
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Zhang Y, Huang Y, Xu Y. Antiviral Treatment Options for Severe Fever with Thrombocytopenia Syndrome Infections. Infect Dis Ther 2022; 11:1805-1819. [PMID: 36136218 PMCID: PMC9510271 DOI: 10.1007/s40121-022-00693-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 09/05/2022] [Indexed: 11/28/2022] Open
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is a tick-borne virus that produces severe fever with thrombocytopenia syndrome (SFTS). It is widespread in Japan, South Korea, and Central and Eastern China. The epidemic has developed rapidly through China in recent years. SFTS cases have been reported in 25 provinces in China, mainly distributed in rural areas in mountainous and hilly areas. The infection has a high case fatality rate and no specific treatments or vaccinations. Therefore, early diagnosis and treatment of SFTS infection is important to survival and disease control. In this article, we provide an overview on different aspects of SFTS with an emphasis on management, to explore the current treatment and prophylactic measures further.
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Affiliation(s)
- Yin Zhang
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Rd, Hefei, China
| | - Ying Huang
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Rd, Hefei, China.
| | - Yuanhong Xu
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Rd, Hefei, China.
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40
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Wang T, Xu L, Zhu B, Wang J, Zheng X. Immune escape mechanisms of severe fever with thrombocytopenia syndrome virus. Front Immunol 2022; 13:937684. [PMID: 35967309 PMCID: PMC9366518 DOI: 10.3389/fimmu.2022.937684] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS), which is caused by SFTS virus (SFTSV), poses a serious threat to global public health, with high fatalities and an increasing prevalence. As effective therapies and prevention strategies are limited, there is an urgent need to elucidate the pathogenesis of SFTS. SFTSV has evolved several mechanisms to escape from host immunity. In this review, we summarize the mechanisms through which SFTSV escapes host immune responses, including the inhibition of innate immunity and evasion of adaptive immunity. Understanding the pathogenesis of SFTS will aid in the development of new strategies for the treatment of this disease.
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Affiliation(s)
- Tong Wang
- Department of Infectious Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Joint International Laboratory of Infection and Immunity, Huazhong University of Science and Technology, Wuhan, China
| | - Ling Xu
- Department of Infectious Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Joint International Laboratory of Infection and Immunity, Huazhong University of Science and Technology, Wuhan, China
| | - Bin Zhu
- Department of Infectious Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Joint International Laboratory of Infection and Immunity, Huazhong University of Science and Technology, Wuhan, China
| | - Junzhong Wang
- Department of Infectious Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Joint International Laboratory of Infection and Immunity, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Junzhong Wang, ; Xin Zheng,
| | - Xin Zheng
- Department of Infectious Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Joint International Laboratory of Infection and Immunity, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Junzhong Wang, ; Xin Zheng,
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41
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Choi HJ, Jung KM, Rengaraj D, Lee KY, Yoo E, Kim TH, Han JY. Single-cell RNA sequencing of mitotic-arrested prospermatogonia with DAZL::GFP chickens and revealing unique epigenetic reprogramming of chickens. J Anim Sci Biotechnol 2022; 13:64. [PMID: 35659766 PMCID: PMC9169296 DOI: 10.1186/s40104-022-00712-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 04/01/2022] [Indexed: 11/21/2022] Open
Abstract
Background Germ cell mitotic arrest is conserved in many vertebrates, including birds, although the time of entry or exit into quiescence phase differs. Mitotic arrest is essential for the normal differentiation of male germ cells into spermatogonia and accompanies epigenetic reprogramming and meiosis inhibition from embryonic development to post-hatch. However, mitotic arrest was not well studied in chickens because of the difficulty in obtaining pure germ cells from relevant developmental stage. Results We performed single-cell RNA sequencing to investigate transcriptional dynamics of male germ cells during mitotic arrest in DAZL::GFP chickens. Using differentially expressed gene analysis and K-means clustering to analyze cells at different developmental stages (E12, E16, and hatch), we found that metabolic and signaling pathways were regulated, and that the epigenome was reprogrammed during mitotic arrest. In particular, we found that histone H3K9 and H3K14 acetylation (by HDAC2) and DNA demethylation (by DNMT3B and HELLS) led to a transcriptionally permissive chromatin state. Furthermore, we found that global DNA demethylation occurred gradually after the onset of mitotic arrest, indicating that the epigenetic-reprogramming schedule of the chicken genome differs from that of the mammalian genome. DNA hypomethylation persisted after hatching, and methylation was slowly re-established 3 weeks later. Conclusions We found a unique epigenetic-reprogramming schedule of mitotic-arrested chicken prospermatogonia and prolonged hypomethylation after hatching. This will provide a foundation for understanding the process of germ-cell epigenetic regulation in several species for which this process is not clearly described. Our findings on the biological processes related to sex-specific differentiation of prospermatogonia could help studying germline development in vitro more elaborately. Supplementary Information The online version contains supplementary material available at 10.1186/s40104-022-00712-4.
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Affiliation(s)
- Hyeon Jeong Choi
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, South Korea
| | - Kyung Min Jung
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, South Korea
| | - Deivendran Rengaraj
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, South Korea
| | - Kyung Youn Lee
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, South Korea
| | - Eunhui Yoo
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, South Korea
| | - Tae Hyun Kim
- Department of Animal Science, Pennsylvania State University, State College, PA, 16801, USA
| | - Jae Yong Han
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, South Korea.
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Revealing the Immune Heterogeneity between Systemic Lupus Erythematosus and Rheumatoid Arthritis Based on Multi-Omics Data Analysis. Int J Mol Sci 2022; 23:ijms23095166. [PMID: 35563556 PMCID: PMC9101622 DOI: 10.3390/ijms23095166] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 04/26/2022] [Accepted: 04/29/2022] [Indexed: 02/01/2023] Open
Abstract
The pathogenesis of systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA) are greatly influenced by different immune cells. Nowadays both T-cell receptor (TCR) and B-cell receptor (BCR) sequencing technology have emerged with the maturity of NGS technology. However, both SLE and RA peripheral blood TCR or BCR repertoire sequencing remains lacking because repertoire sequencing is an expensive assay and consumes valuable tissue samples. This study used computational methods TRUST4 to construct TCR repertoire and BCR repertoire from bulk RNA-seq data of both SLE and RA patients’ peripheral blood and analyzed the clonality and diversity of the immune repertoire between the two diseases. Although the functions of immune cells have been studied, the mechanism is still complicated. Differentially expressed genes in each immune cell type and cell–cell interactions between immune cell clusters have not been covered. In this work, we clustered eight immune cell subsets from original scRNA-seq data and disentangled the characteristic alterations of cell subset proportion under both SLE and RA conditions. The cell–cell communication analysis tool CellChat was also utilized to analyze the influence of MIF family and GALECTIN family cytokines, which were reported to regulate SLE and RA, respectively. Our findings correspond to previous findings that MIF increases in the serum of SLE patients. This work proved that the presence of LGALS9, PTPRC and CD44 in platelets could serve as a clinical indicator of rheumatoid arthritis. Our findings comprehensively illustrate dynamic alterations in immune cells during pathogenesis of SLE and RA. This work identified specific V genes and J genes in TCR and BCR that could be used to expand our understanding of SLE and RA. These findings provide a new insight inti the diagnosis and treatment of the two autoimmune diseases.
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