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Lee AR, Kim SH, Hong SY, Lee SH, Oh JS, Lee KY, Kim SJ, Ishikawa T, Shim SM, Lee HI, Seo SU. Characterization of genotype V Japanese encephalitis virus isolates from Republic of Korea. Emerg Microbes Infect 2024; 13:2362392. [PMID: 38808613 PMCID: PMC11168223 DOI: 10.1080/22221751.2024.2362392] [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: 03/13/2024] [Accepted: 05/27/2024] [Indexed: 05/30/2024]
Abstract
Japanese encephalitis (JE), caused by the Japanese encephalitis virus (JEV) infection, continues to pose significant public health challenges worldwide despite efficient vaccines. The virus is classified into five genotypes, among which genotype V (GV) was not detected for a long period after its initial isolation in 1952, until reports emerged from China and the Republic of Korea (ROK) since 2009. The characteristics of the virus are crucial in estimating its potential epidemiological impact. However, characterization of GV JEVs has so far been limited to two strains: Muar, the original isolate, and XZ0934, isolated in China. Two additional ROK GV JEV isolates, NCCP 43279 and NCCP 43413, are currently available, but their characteristics have not been explored. Our phylogenetic analysis revealed that GV virus sequences from the ROK segregate into two clades. NCCP 43279 and NCCP 43413 belong to different clades and exhibit distinct in vitro phenotypes. NCCP 43279 forms larger plaques but demonstrates inefficient propagation in cell culture compared to NCCP 43413. In vivo, NCCP 43279 induces higher morbidity and mortality in mice than NCCP 43413. Notably, NCCP 43279 shows more severe blood-brain barrier damage, suggesting superior brain invasion capabilities. Consistent with its higher virulence, NCCP 43279 displays more pronounced histopathological and immunopathological outcomes. In conclusion, our study confirms that the two ROK isolates are not only classified into different clades but also exhibit distinct in vitro and in vivo characteristics.
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Affiliation(s)
- Ah-Ra Lee
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Republic of Korea
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sang-Hyun Kim
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Republic of Korea
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Su-Yeon Hong
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Republic of Korea
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sang-Ho Lee
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Republic of Korea
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jae Sang Oh
- Department of Neurosurgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kyung Yong Lee
- Division of Cancer Biology, Research Institute, National Cancer Center, Goyang, Republic of Korea
| | - Seong-Jun Kim
- Center for Infectious Disease Vaccine and Diagnosis Innovation (CEVI), Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Tomohiro Ishikawa
- Department of Microbiology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Sang-Mu Shim
- Division of Acute Virus Diseases, Korea National Institute of Health, Korea Disease Control and Prevention Agency, Cheongju, Republic of Korea
| | - Hee Il Lee
- Division of Vectors and Parasitic Diseases, Korea Disease Control and Prevention Agency, Cheongju, Republic of Korea
| | - Sang-Uk Seo
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Republic of Korea
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Thierry AR, Salmon D. Inflammation-, immunothrombosis,- and autoimmune-feedback loops may lead to persistent neutrophil self-stimulation in long COVID. J Med Virol 2024; 96:e29887. [PMID: 39189651 DOI: 10.1002/jmv.29887] [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: 03/28/2024] [Revised: 07/10/2024] [Accepted: 08/13/2024] [Indexed: 08/28/2024]
Abstract
Understanding the pathophysiology of long COVID is one of the most intriguing challenges confronting contemporary medicine. Despite observations recently made in the relevant molecular, cellular, and physiological domains, it is still difficult to say whether the post-acute sequelae of COVID-19 directly correspond to the consequences of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. This work hypothesizes that neutrophils and neutrophil extracellular traps (NETs) production are at the interconnection of three positive feedback loops which are initiated in the acute phase of SARS-CoV-2 infection, and which involve inflammation, immunothrombosis, and autoimmunity. This phenomenon could be favored by the fact that SARS-CoV-2 may directly bind and penetrate neutrophils. The ensuing strong neutrophil stimulation leads to a progressive amplification of an exacerbated and uncontrolled NETs production, potentially persisting for months beyond the acute phase of infection. This continuous self-stimulation of neutrophils leads, in turn, to systemic inflammation, micro-thromboses, and the production of autoantibodies, whose significant consequences include the persistence of endothelial and multiorgan damage, and vascular complications.
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Affiliation(s)
- Alain R Thierry
- IRCM, Institute of Research on Cancerology of Montpellier, INSERM U1194, University of Montpellier, Montpellier, France
- Montpellier Cancer Institute (ICM), Montpellier, France
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Nowaczewska-Kuchta A, Ksiazek-Winiarek D, Szpakowski P, Glabinski A. The Role of Neutrophils in Multiple Sclerosis and Ischemic Stroke. Brain Sci 2024; 14:423. [PMID: 38790402 PMCID: PMC11118671 DOI: 10.3390/brainsci14050423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 04/19/2024] [Accepted: 04/23/2024] [Indexed: 05/26/2024] Open
Abstract
Inflammation plays an important role in numerous central nervous system (CNS) disorders. Its role is ambiguous-it can induce detrimental effects, as well as repair and recovery. In response to injury or infection, resident CNS cells secrete numerous factors that alter blood-brain barrier (BBB) function and recruit immune cells into the brain, like neutrophils. Their role in the pathophysiology of CNS diseases, like multiple sclerosis (MS) and stroke, is highly recognized. Neutrophils alter BBB permeability and attract other immune cells into the CNS. Previously, neutrophils were considered a homogenous population. Nowadays, it is known that various subtypes of these cells exist, which reveal proinflammatory or immunosuppressive functions. The primary goal of this review was to discuss the current knowledge regarding the important role of neutrophils in MS and stroke development and progression. As the pathogenesis of these two disorders is completely different, it gives the opportunity to get insight into diverse mechanisms of neutrophil involvement in brain pathology. Our understanding of the role of neutrophils in CNS diseases is still evolving as new aspects of their activity are being unraveled. Neutrophil plasticity adds another level to their functional complexity and their importance for CNS pathophysiology.
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Affiliation(s)
| | | | | | - Andrzej Glabinski
- Department of Neurology and Stroke, Medical University of Lodz, ul. Zeromskiego 113, 90-549 Lodz, Poland; (A.N.-K.); (D.K.-W.); (P.S.)
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Cao H, Li B, Mu M, Li S, Chen H, Tao H, Wang W, Zou Y, Zhao Y, Liu Y, Tao X. Nicotine suppresses crystalline silica-induced astrocyte activation and neuronal death by inhibiting NF-κB in the mouse hippocampus. CNS Neurosci Ther 2024; 30:e14508. [PMID: 37864452 PMCID: PMC11017465 DOI: 10.1111/cns.14508] [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: 06/22/2023] [Revised: 09/25/2023] [Accepted: 10/06/2023] [Indexed: 10/22/2023] Open
Abstract
AIMS Exposure to crystalline silica (CS) in occupational settings induces chronic inflammation in the respiratory system and, potentially, the brain. Some workers are frequently concurrently exposed to both CS and nicotine. Here, we explored the impact of nicotine on CS-induced neuroinflammation in the mouse hippocampus. METHODS In this study, we established double-exposed models of CS and nicotine in C57BL/6 mice. To assess depression-like behavior, experiments were conducted at 3, 6, and 9 weeks. Serum inflammatory factors were analyzed by ELISA. Hippocampus was collected for RNA sequencing analysis and examining the gene expression patterns linked to inflammation and cell death. Microglia and astrocyte activation and hippocampal neuronal death were assessed using immunohistochemistry and immunofluorescence staining. Western blotting was used to analyze the NF-κB expression level. RESULTS Mice exposed to CS for 3 weeks showed signs of depression. This was accompanied by elevated IL-6 in blood, destruction of the blood-brain barrier, and activation of astrocytes caused by an increased NF-κB expression in the CA1 area of the hippocampus. The elevated levels of astrocyte-derived Lcn2 and upregulated genes related to inflammation led to higher neuronal mortality. Moreover, nicotine mitigated the NF-κB expression, astrocyte activation, and neuronal death, thereby ameliorating the associated symptoms. CONCLUSION Silica exposure induces neuroinflammation and neuronal death in the mouse hippocampal CA1 region and depressive behavior. However, nicotine inhibits CS-induced neuroinflammation and neuronal apoptosis, alleviating depressive-like behaviors in mice.
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Affiliation(s)
- Hangbing Cao
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of EducationAnhui University of Science and TechnologyHuainanChina
- Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education InstitutesAnhui University of Science and TechnologyHuainanChina
- Anhui Province Engineering Laboratory of Occupational Health and SafetyAnhui University of Science and TechnologyHuainanChina
- School of Medicine, Department of Medical Frontier Experimental CenterAnhui University of Science and TechnologyHuainanChina
| | - Bing Li
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of EducationAnhui University of Science and TechnologyHuainanChina
- Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education InstitutesAnhui University of Science and TechnologyHuainanChina
- Anhui Province Engineering Laboratory of Occupational Health and SafetyAnhui University of Science and TechnologyHuainanChina
- School of Medicine, Department of Medical Frontier Experimental CenterAnhui University of Science and TechnologyHuainanChina
| | - Min Mu
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of EducationAnhui University of Science and TechnologyHuainanChina
- Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education InstitutesAnhui University of Science and TechnologyHuainanChina
- Anhui Province Engineering Laboratory of Occupational Health and SafetyAnhui University of Science and TechnologyHuainanChina
- School of Medicine, Department of Medical Frontier Experimental CenterAnhui University of Science and TechnologyHuainanChina
| | - Shanshan Li
- School of PharmacyBengbu Medical CollegeBengbuChina
| | - Haoming Chen
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of EducationAnhui University of Science and TechnologyHuainanChina
- Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education InstitutesAnhui University of Science and TechnologyHuainanChina
- Anhui Province Engineering Laboratory of Occupational Health and SafetyAnhui University of Science and TechnologyHuainanChina
- School of Medicine, Department of Medical Frontier Experimental CenterAnhui University of Science and TechnologyHuainanChina
| | - Huihui Tao
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of EducationAnhui University of Science and TechnologyHuainanChina
- Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education InstitutesAnhui University of Science and TechnologyHuainanChina
- Anhui Province Engineering Laboratory of Occupational Health and SafetyAnhui University of Science and TechnologyHuainanChina
- School of Medicine, Department of Medical Frontier Experimental CenterAnhui University of Science and TechnologyHuainanChina
| | - Wenyang Wang
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of EducationAnhui University of Science and TechnologyHuainanChina
- Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education InstitutesAnhui University of Science and TechnologyHuainanChina
- Anhui Province Engineering Laboratory of Occupational Health and SafetyAnhui University of Science and TechnologyHuainanChina
- School of Medicine, Department of Medical Frontier Experimental CenterAnhui University of Science and TechnologyHuainanChina
| | - Yuanjie Zou
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of EducationAnhui University of Science and TechnologyHuainanChina
- Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education InstitutesAnhui University of Science and TechnologyHuainanChina
- Anhui Province Engineering Laboratory of Occupational Health and SafetyAnhui University of Science and TechnologyHuainanChina
- School of Medicine, Department of Medical Frontier Experimental CenterAnhui University of Science and TechnologyHuainanChina
| | - Yehong Zhao
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of EducationAnhui University of Science and TechnologyHuainanChina
- Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education InstitutesAnhui University of Science and TechnologyHuainanChina
- Anhui Province Engineering Laboratory of Occupational Health and SafetyAnhui University of Science and TechnologyHuainanChina
- School of Medicine, Department of Medical Frontier Experimental CenterAnhui University of Science and TechnologyHuainanChina
| | - Yang Liu
- Anhui Province Engineering Laboratory of Occupational Health and SafetyAnhui University of Science and TechnologyHuainanChina
- School of Medicine, Department of Medical Frontier Experimental CenterAnhui University of Science and TechnologyHuainanChina
| | - Xinrong Tao
- Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of EducationAnhui University of Science and TechnologyHuainanChina
- Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education InstitutesAnhui University of Science and TechnologyHuainanChina
- Anhui Province Engineering Laboratory of Occupational Health and SafetyAnhui University of Science and TechnologyHuainanChina
- School of Medicine, Department of Medical Frontier Experimental CenterAnhui University of Science and TechnologyHuainanChina
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Huang CW, Lin JJ, Kuo CY, Lin KL, Huang YC, Chiu CH, Chen YC, Chen CH, Hsieh YC. Risk factors of Omicron variant associated acute encephalitis/encephalopathy in children. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2023; 56:1169-1177. [PMID: 37709632 DOI: 10.1016/j.jmii.2023.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 08/29/2023] [Accepted: 08/30/2023] [Indexed: 09/16/2023]
Abstract
BACKGROUND Outbreak of Omicron BA.2 in Taiwan led to an increased number of acute encephalitis/encephalopathy cases in children and several fatal cases drew public attention. In pre-Omicron period, pediatric cases of COVID-19-associated acute encephalitis have been reported and during Omicron epidemic, febrile convulsions, encephalitis were mentioned more frequently. The outcome of patients with neurological complications was worse. However, few studies investigated the risk factors, pathophysiology and prognosis of COVID-19-associated encephalitis/encephalopathy. Here, we describe the presentation of pediatric cases of COVID-19-associated acute encephalitis/encephalopathy and explore the associated risk factors. METHODS Pediatric patients with confirmed SARS-CoV-2 infections were prospectively enrolled at admission at Chang Gung Memorial Hospital between April and August 2022. Patients were categorized into groups of acute encephalitis/encephalopathy, febrile convulsions or mild disease. Demographic descriptions, clinical manifestations and laboratory data were collected. RESULTS Of 288 acute COVID-19 patients, there were 38 (13.2%) acute encephalitis/encephalopathy, 40 (13.9%) febrile convulsions, and 210 (72.9%) mild disease. Among acute encephalitis/encephalopathy group, the mean age was 68.3 ± 45.0 months. The common neurological symptoms were lethargy (65.8%), seizures (52.6%), and impaired consciousness (34.2%). Over 3 years old (adjusted odds ratio [aOR]: 7.57, p < 0.001), absolute neutrophil count ≥3150/μL (aOR: 5.46, p = 0.008), and procalcitonin ≥0.5 ng/mL (aOR: 4.32, p = 0.021) were independent factors for acute encephalitis/encephalopathy. CONCLUSIONS Most cases of COVID-19-associated acute encephalitis/encephalopathy showed no evidence of direct viral invasion but associations with older age, increased peripheral neutrophil, and serum procalcitonin. These findings may imply the neutrophil-mediated systemic inflammatory response plays an important role on central nerve system, leading to cerebral dysfunction.
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Affiliation(s)
- Chong-Wei Huang
- Department of Pediatrics, Chang Gung Children's Hospital, Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Taoyuan, Taiwan; Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Jainn-Jim Lin
- Department of Pediatrics, Chang Gung Children's Hospital, Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Taoyuan, Taiwan; Division of Pediatric Critical Care, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Division of Pediatric Neurology, Department of Pediatrics, Chang Gung Children's Hospital and Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chen-Yen Kuo
- Department of Pediatrics, Chang Gung Children's Hospital, Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Taoyuan, Taiwan; Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Kuang-Lin Lin
- Department of Pediatrics, Chang Gung Children's Hospital, Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Taoyuan, Taiwan; Division of Pediatric Neurology, Department of Pediatrics, Chang Gung Children's Hospital and Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yhu-Chering Huang
- Department of Pediatrics, Chang Gung Children's Hospital, Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Taoyuan, Taiwan; Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Cheng-Hsun Chiu
- Department of Pediatrics, Chang Gung Children's Hospital, Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Taoyuan, Taiwan; Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan; Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yi-Ching Chen
- Department of Pediatrics, Chang Gung Children's Hospital, Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Taoyuan, Taiwan; Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Chih-Ho Chen
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan; Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yu-Chia Hsieh
- Department of Pediatrics, Chang Gung Children's Hospital, Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Taoyuan, Taiwan; Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan.
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Tang N, Gong XR, Huang H, Meng Q. Activated neutrophil-derived exosomes contribute to blood-brain barrier damage and hemorrhagic transformation after cerebral ischemia/reperfusion. Brain Res 2023; 1810:148374. [PMID: 37116559 DOI: 10.1016/j.brainres.2023.148374] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/13/2023] [Accepted: 04/24/2023] [Indexed: 04/30/2023]
Abstract
BACKGROUND Hemorrhagic transformation (HT) caused by blood-brain barrier (BBB) damage is closely correlated with the poor prognosis of ischemic stroke. Neutrophils are proven to mediate BBB injury after ischemic stroke, but the mechanism remains to be further investigated. Therefore, the present study aims to investigate the effect of neutrophil-derived exosomes on BBB integrity. METHOD A tMCAO-HT model was constructed to assess neutrophil infiltration and its co-localization with brain microvascular endothelial cells (BMEC). After using quiet (Q-Neu) and activated neutrophil (A-Neu) and their exosomes to treat the BBB model in vitro, TEER and permeability were assayed to assess the BBB integrity. Small RNA sequencing was performed to identify differentially expressed miRNAs (DE-miRNAs) in A-Neu- and Q-Neu-derived exosomes, and the function and pathways of DE-miRNA targets were analyzed by GO and KEGG enrichment. RESULT Different degrees of cerebral hemorrhage were observed in the tMCAO-HT model. The expression of the neutrophil marker Ly6G was significantly increased in tMCAO-HT model compared to the sham group, and co-localized with the BMEC marker CD31. Notably, Ly6G expression was positively correlated with hemoglobin content in brain tissue. A-Neu and its derived exosomes reduced TEER and elevated permeability in the BBB model in vitro. Moreover, BBB-related proteins Claudin 5, Occludin and ZO-1 expression were significantly reduced in BMEC after treatment with A-Neu and its derived exosomes. Nevertheless, Q-Neu and its exosomes had no significant effect on BBB integrity. A total of 84 DE-miRNAs are present in Q-Neu- and A-Neu-derived exosomes, and their target genes are involved in the regulation of "positive regulation of establishment of endothelial barrier", "cell junction", "ECM-receptor interaction" and "VEGF signaling pathway". Moreover, RT-qPCR revealed that the expression trends of miR-409-3p, miR-6909-5p, miR-3473d, miR-370-3p and miR-6904-5p in exosomes were consistent with the sequencing results. CONCLUSION Neutrophils are abnormally recruited in HT after ischemic stroke, and are associated with cerebral hemorrhage. In vitro, A-Neu-derived exosomes facilitate BBB injury, which may be accomplished by exosomal transport of miRNAs.
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Affiliation(s)
- Ning Tang
- Faculty of Life science and Technology, Kunming University of Science and Technology, Kunming, 650051, Yunnan, P. R. China; Department of Neurology, the First People's Hospital of Yunnan Province, the Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650032, Yunnan, P. R. China
| | - Xia-Rong Gong
- Department of magnetic resonance, the First People's Hospital of Yunnan Province, the Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650032, Yunnan, P. R. China
| | - Hong Huang
- Department of Geriatric Medicine, The First People' s Hospital of Yunnan Province, the Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650032, Yunnan, P. R. China
| | - Qiang Meng
- Department of Neurology, the First People's Hospital of Yunnan Province, the Affiliated Hospital of Kunming University of Science and Technology, Kunming, 650032, Yunnan, P. R. China.
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Modulation of Production of Th1/Th2 Cytokines in Peripheral Blood Mononuclear Cells and Neutrophils by Hepatitis C Virus Infection in Chronically Infected Patients. Pathogens 2021; 10:pathogens10111519. [PMID: 34832674 PMCID: PMC8624222 DOI: 10.3390/pathogens10111519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/18/2021] [Accepted: 11/19/2021] [Indexed: 12/18/2022] Open
Abstract
This study investigated the influence of Hepatitis C virus (HCV) infection on the cytokine production profiles of the peripheral blood monoculear cells (PBMC) and neutrophils in chronically naïve HCV-infected patients. Seventy-five genotype-4 naïve HCV-infected patients (HCV+) and healthy subjects (HCV-) were enrolled. The neutrophils and the PBMC were separated by density gradient sedimentation and stimulated with a mitogen. The culture supernatants were evaluated for levels of IFN-α, IFN-γ, IL-2, IL-4, IL-5, IL-6, IL-9, IL-10, IL-12, and TNF-α using anti-cytokine antibody MACSPlex capture beads. The PBMC cytokine profiles of HCV+ patients showed significantly lower mean values for IFN-γ, IL-2, IL-6, IL-9, and IL-10 (p < 0.0001) as compared to HCV- subjects. In contrast, HCV+ patients showed higher mean levels of PBMC cytokine values for IL-5 and TNF-α (p < 0.0001). As for neutrophils, HCV+ patients showed significantly lower mean levels of IFN-α, IFN-γ, IL-2, IL-4, IL-6, IL-9, and IL-10 (p < 0.0001). In contrast, the neutrophils from HCV+ patients showed higher mean levels of IL-5, IL-12, and TNF-α (p < 0.0001). Th1-Th2 cytokine ratios suggested a lower Th1 bias in HCV+ subjects as compared to HCV- subjects. Our results suggest that chronic HCV infection brings about an immunomodulatory effect not only on neutrophils, but also to a lower extent on PBMCs.
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Canavero I, Ravaglia S, Valentino F, Micieli G. Guillain Barrè syndrome and myelitis associated with SARS-CoV-2 infection. Neurosci Lett 2021; 759:136040. [PMID: 34118307 PMCID: PMC8189748 DOI: 10.1016/j.neulet.2021.136040] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 01/29/2021] [Accepted: 06/04/2021] [Indexed: 12/18/2022]
Abstract
Despite a likely underestimation due to the many obstacles of the highly infectious, intensive care setting, increasing clinical reports about COVID-19 patients developing acute paralysis for polyradiculoneuritis or myelitis determine additional impact on the disease course and outcome. Different pathogenic mechanisms have been postulated basing on clinical, laboratory and neuroimaging features, and response to treatments. Here we provide an overview with insights built on the available reports. Besides direct viral pathogenicity, a crucial role seems to be represented by immune-mediated mechanisms, supporting and further characterizing the already hypothesized neurotropic potential of SARS-CoV-2 and implying specific treatments. Proper clinical and instrumental depiction of symptomatic cases, as well as screening for their early recognition is advocated.
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Affiliation(s)
- Isabella Canavero
- Current affiliation: Cerebrovascular Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy; Emergency Neurology Unit, IRCCS Casimiro Mondino Foundation, Pavia, Italy.
| | - Sabrina Ravaglia
- Emergency Neurology Unit, IRCCS Casimiro Mondino Foundation, Pavia, Italy
| | | | - Giuseppe Micieli
- Emergency Neurology Unit, IRCCS Casimiro Mondino Foundation, Pavia, Italy
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Delavari F, Varzaneh FN, Rezaei N. Neurologic Manifestations of COVID-19. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1318:343-353. [PMID: 33973188 DOI: 10.1007/978-3-030-63761-3_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Neurological manifestations of novel coronavirus disease (COVID-19) are reported to occur in as much as 37% of the affected patients. These manifestations range from headache and dizziness to altered mental status and consciousness, anosmia, ageusia, sensory disturbances, and stroke. The mechanisms by which the neurological symptoms arise are not yet determined but may either proceed as an indirect consequence of systemic hyperinflammation or result from the direct invasion of the virus to neural and glial cells. The neural invasion can explain both the retrograde pathway of encephalitis and the early manifestation of anosmia by invading the olfactory bulb. Moreover, in the case of attacking the brain stem, it may take part in the early apnea manifestation reported by patients. Additionally, neurotropism of the virus could be the cause of acute hemorrhagic encephalitis. Hyperinflammation can have acute and prolonged effects in the nervous system, such as acute demyelination and predisposition to multiple sclerosis. Moreover, the pro-inflammatory state contributes to hypercoagulation, which in turn could result in cerebrovascular injuries in COVID-19 patients. This chapter would discuss that the neurologic manifestations of the COVID-19 are to be looked at as a multifactorial entangled phenomenon.
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Affiliation(s)
- Farnaz Delavari
- University of Geneva, Geneva, Switzerland.
- Interactive Research Education and Training Association (IRETA), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
| | - Farnaz Najmi Varzaneh
- The Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins University, Baltimore, MD, USA
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Baltimore, MD, USA
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
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Michael BD, Bricio-Moreno L, Sorensen EW, Miyabe Y, Lian J, Solomon T, Kurt-Jones EA, Luster AD. Astrocyte- and Neuron-Derived CXCL1 Drives Neutrophil Transmigration and Blood-Brain Barrier Permeability in Viral Encephalitis. Cell Rep 2021; 32:108150. [PMID: 32937134 DOI: 10.1016/j.celrep.2020.108150] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 07/17/2020] [Accepted: 08/25/2020] [Indexed: 12/23/2022] Open
Abstract
Herpes simplex virus (HSV)-1 encephalitis has significant morbidity partly because of an over-exuberant immune response characterized by leukocyte infiltration into the brain and increased blood-brain barrier (BBB) permeability. Determining the role of specific leukocyte subsets and the factors that mediate their recruitment into the brain is critical to developing targeted immune therapies. In a murine model, we find that the chemokines CXCL1 and CCL2 are induced in the brain following HSV-1 infection. Ccr2 (CCL2 receptor)-deficient mice have reduced monocyte recruitment, uncontrolled viral replication, and increased morbidity. Contrastingly, Cxcr2 (CXCL1 receptor)-deficient mice exhibit markedly reduced neutrophil recruitment, BBB permeability, and morbidity, without influencing viral load. CXCL1 is produced by astrocytes in response to HSV-1 and by astrocytes and neurons in response to IL-1α, and it is the critical ligand required for neutrophil transendothelial migration, which correlates with BBB breakdown. Thus, the CXCL1-CXCR2 axis represents an attractive therapeutic target to limit neutrophil-mediated morbidity in HSV-1 encephalitis.
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Affiliation(s)
- Benedict D Michael
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA; National Institute for Health Research, Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, L69 7BE, UK; The Walton Centre NHS Foundation Trust, Department of Neurology, Liverpool L9 7LJ, UK
| | - Laura Bricio-Moreno
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Elizabeth W Sorensen
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Yoshishige Miyabe
- Department of Cell Biology, Institute for Advanced Medical Sciences, Nippon Medical School, Tokyo 113-8602, Japan
| | - Jeffrey Lian
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Tom Solomon
- National Institute for Health Research, Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, L69 7BE, UK; The Walton Centre NHS Foundation Trust, Department of Neurology, Liverpool L9 7LJ, UK
| | - Evelyn A Kurt-Jones
- University of Massachusetts Medical School, Department of Medicine, Division of Infectious Disease and Immunology, Worcester, MA 01655, USA
| | - Andrew D Luster
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.
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Septyaningtrias DE, Susilowati R. Neurological involvement of COVID-19: from neuroinvasion and neuroimmune crosstalk to long-term consequences. Rev Neurosci 2021; 32:427-442. [PMID: 33550780 DOI: 10.1515/revneuro-2020-0092] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 11/07/2020] [Indexed: 12/12/2022]
Abstract
As the coronavirus disease 2019 (COVID-19) pandemic continues to be a multidimensional threat to humanity, more evidence of neurological involvement associated with it has emerged. Neuroimmune interaction may prove to be important not only in the pathogenesis of neurological manifestations but also to prevent systemic hyperinflammation. In this review, we summarize reports of COVID-19 cases with neurological involvement, followed by discussion of possible routes of entry, immune responses against coronavirus infection in the central nervous system and mechanisms of nerve degeneration due to viral infection and immune responses. Possible mechanisms for neuroprotection and virus-associated neurological consequences are also discussed.
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Affiliation(s)
- Dian Eurike Septyaningtrias
- Department of Histology and Cell Biology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Jalan Farmako Sekip Utara, Yogyakarta55281, Indonesia
| | - Rina Susilowati
- Department of Histology and Cell Biology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Jalan Farmako Sekip Utara, Yogyakarta55281, Indonesia
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12
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NF-κB mediates early blood-brain barrier disruption in a rat model of traumatic shock. J Trauma Acute Care Surg 2020; 86:240-249. [PMID: 30399134 DOI: 10.1097/ta.0000000000002124] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Blood-brain barrier (BBB) disruption is associated with a large number of central nervous system and systemic disorders. The aim of the present study was to investigate the dynamic change of BBB changes during traumatic shock and resuscitation as well as the mechanisms involved. METHODS The experiments were performed on male Sprague-Dawley rats anesthetized with pentobarbital sodium. To produce traumatic shock, the rats were subjected to bilateral femoral traumatic fracture and blood withdrawal from the femoral artery to decrease mean arterial pressure (MAP) to 35 mm Hg. Hypovolemic status (at a MAP of 35 to 40 mm Hg) was sustained for 1 hour followed by fluid resuscitation with shed blood and 20 mL/kg of lactated Ringer's solution. RESULTS The rats were sacrificed at 1 hour, 2 hours, or 6 hours after fluid resuscitation. Blood-brain barrier permeability studies showed that traumatic shock significantly increased brain water contents and sodium fluorescein leakage, which was aggravated by fluid resuscitation. Real-time reverse transcription-polymerase chain reaction (RT-PCR) and Western blot analyses revealed that Na-K-Cl cotransporter-1 and vascular endothelial growth factor (VEGF) expression were upregulated in cortical brain tissue of traumatic shock rats, and this change was accompanied by downregulation of occludin and claudin-5. Traumatic shock also significantly increased the protein levels of NF-κB-p65 subunit. Of note, administration of NF-κB inhibitor PDTC effectively attenuated augmentation of the above changes. CONCLUSION Our results suggest that traumatic shock is associated with early BBB disruption, and inhibition of NF-κB may be an effective therapeutic strategy in protecting the BBB under traumatic shock conditions.
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13
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CD8 T Cells and STAT1 Signaling Are Essential Codeterminants in Protection from Polyomavirus Encephalopathy. J Virol 2020; 94:JVI.02038-19. [PMID: 31996425 DOI: 10.1128/jvi.02038-19] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 01/21/2020] [Indexed: 01/27/2023] Open
Abstract
JC polyomavirus (JCPyV), a human-specific virus, causes the aggressive brain-demyelinating disease progressive multifocal leukoencephalopathy (PML) in individuals with depressed immune status. The increasing incidence of PML in patients receiving immunotherapeutic and chemotherapeutic agents creates a pressing clinical need to define biomarkers to stratify PML risk and develop anti-JCPyV interventions. Mouse polyomavirus (MuPyV) CNS infection causes encephalopathology and may provide insight into JCPyV-PML pathogenesis. Type I, II, and III interferons (IFNs), which all signal via the STAT1 transcription factor, mediate innate and adaptive immune defense against a variety of viral infections. We previously reported that type I and II IFNs control MuPyV infection in non-central nervous system (CNS) organs, but their relative contributions to MuPyV control in the brain remain unknown. To this end, mice deficient in type I, II, or III IFN receptors or STAT1 were infected intracerebrally with MuPyV. We found that STAT1, but not type I, II, or III IFNs, mediated viral control during acute and persistent MuPyV encephalitis. Mice deficient in STAT1 also developed severe hydrocephalus, blood-brain barrier permeability, and increased brain infiltration by myeloid cells. CD8 T cell deficiency alone did not increase MuPyV infection and pathology in the brain. In the absence of STAT1 signaling, however, depletion of CD8 T cells resulted in lytic infection of the choroid plexus and ependymal lining, marked meningitis, and 100% mortality within 2 weeks postinfection. Collectively, these findings indicate that STAT1 signaling and CD8 T cells cocontribute to controlling MuPyV infection in the brain and CNS injury.IMPORTANCE A comprehensive understanding of JCPyV-induced PML pathogenesis is needed to define determinants that predispose patients to PML, a goal whose urgency is heightened by the lack of anti-JCPyV agents. A handicap to achieving this goal is the lack of a tractable animal model to study PML pathogenesis. Using intracerebral inoculation with MuPyV, we found that MuPyV encephalitis in wild-type mice causes an encephalopathy, which is markedly exacerbated in mice deficient in STAT1, a molecule involved in transducing signals from type I, II, and III IFN receptors. CD8 T cell deficiency compounded the severity of MuPyV neuropathology and resulted in dramatically elevated virus levels in the CNS. These findings demonstrate that STAT1 signaling and CD8 T cells concomitantly act to mitigate MuPyV-encephalopathy and control viral infection.
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Kotfis K, Roberson SW, Wilson JE, Pun BT, Ely EW, Jeżowska I, Jezierska M, Dabrowski W. COVID-19: What do we need to know about ICU delirium during the SARS-CoV-2 pandemic? Anaesthesiol Intensive Ther 2020; 52:132-138. [PMID: 32419438 PMCID: PMC7667988 DOI: 10.5114/ait.2020.95164] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 05/08/2020] [Indexed: 01/15/2023] Open
Abstract
In March 2020, the World Health Organisation announced the COVID-19 pandemic caused by the SARS-CoV-2 virus. As well as respiratory failure, the SARS-CoV-2 may cause central nervous system (CNS) involvement, including delirium occurring in critically ill patients (ICU delirium). Due attention must be paid to this subject in the face of the COVID-19 pandemic. Delirium, the detection of which takes less than two minutes, is frequently underestimated during daily routine ICU care, but it may be a prodromal symptom of infection or hypoxia associated with severe respiratory failure. During the COVID-19 pandemic, systematic delirium monitoring using validated tests (CAM-ICU or ICDSC) may be sacrificed. This is likely to be due to the fact that the main emphasis is placed on organisational issues, i.e. the lack of ventilators, setting priorities for limited mechanical ventilation options, and a shortage of personal protective equipment. Early identification of patients with delirium is critical in patients with COVID-19 because the occurrence of delirium may be an early symptom of worsening respiratory failure or of infectious spread to the CNS mediated by potential neuroinvasive mechanisms of the coronavirus. The purpose of this review is to identify problems related to the development of delirium during the COVID-19 epidemic, which are presented in three areas: i) factors contributing to delirium in COVID-19, ii) potential pathophysiological factors of delirium in COVID-19, and iii) long-term consequences of delirium in COVID-19. This article discusses how healthcare workers can reduce the burden of delirium by identifying potential risk factors and difficulties during challenges associated with SARS-CoV-2 infection.
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Affiliation(s)
- Katarzyna Kotfis
- Department of Anaesthesiology, Intensive Therapy, and Acute Intoxications, Pomeranian Medical University, Szczecin, Poland
| | - Shawniqua Williams Roberson
- Critical Illness, Brain Dysfunction, and Survivorship (CIBS) Center, Vanderbilt University Medical Center, Nashville, TN, United States
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, United States
- Department of Bioengineering, Vanderbilt University, Nashville, TN, United States
| | - Jo Ellen Wilson
- Critical Illness, Brain Dysfunction, and Survivorship (CIBS) Center, Vanderbilt University Medical Center, Nashville, TN, United States
- Department of Psychiatry and Behavioral Sciences, Vanderbilt University Medical Center, Nashville, TN, United States
- Geriatric Research, Education, and Clinical Center (GRECC), Tennessee Valley Veterans Affairs Healthcare System, Nashville, TN, United States
| | - Brenda T. Pun
- Critical Illness, Brain Dysfunction, and Survivorship (CIBS) Center, Vanderbilt University Medical Center, Nashville, TN, United States
| | - E. Wesley Ely
- Critical Illness, Brain Dysfunction, and Survivorship (CIBS) Center, Vanderbilt University Medical Center, Nashville, TN, United States
- Geriatric Research, Education, and Clinical Center (GRECC), Tennessee Valley Veterans Affairs Healthcare System, Nashville, TN, United States
- Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Ilona Jeżowska
- Integrative Counselling and Psychotherapy, The Minster Centre, Department of Psychology, Middlesex University, London, UK
| | - Maja Jezierska
- Department of Anaesthesiology and Intensive Care, Medical University of Lublin, Poland
| | - Wojciech Dabrowski
- Department of Anaesthesiology and Intensive Care, Medical University of Lublin, Poland
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