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He L, Liang X, Wang Q, Yang C, Li Y, Liao L, Zhu Z, Wang Y. Genome-wide DNA methylation reveals potential epigenetic mechanism of age-dependent viral susceptibility in grass carp. Immun Ageing 2022; 19:28. [PMID: 35655223 PMCID: PMC9161582 DOI: 10.1186/s12979-022-00285-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 05/14/2022] [Indexed: 11/10/2022]
Abstract
Background Grass carp are an important farmed fish in China that are infected by many pathogens, especially grass carp reovirus (GCRV). Notably, grass carp showed age-dependent susceptibility to GCRV; that is, grass carp not older than one year were sensitive to GCRV, while those over three years old were resistant to this virus. However, the underlying mechanism remains unclear. Herein, whole genome-wide DNA methylation and gene expression variations between susceptible five-month-old (FMO) and resistant three-year-old (TYO) grass carp were investigated aiming to uncover potential epigenetic mechanisms. Results Colorimetric quantification revealed that the global methylation level in TYO fish was higher than that in FMO fish. Whole-genome bisulfite sequencing (WGBS) of the two groups revealed 6214 differentially methylated regions (DMRs) and 4052 differentially methylated genes (DMGs), with most DMRs and DMGs showing hypermethylation patterns in TYO fish. Correlation analysis revealed that DNA hypomethylation in promoter regions and DNA hypermethylation in gene body regions were associated with gene expression. Enrichment analysis revealed that promoter hypo-DMGs in TYO fish were significantly enriched in typical immune response pathways, whereas gene body hyper-DMGs in TYO fish were significantly enriched in terms related to RNA transcription, biosynthesis, and energy production. RNA-seq analysis of the corresponding samples indicated that most of the genes in the above terms were upregulated in TYO fish. Moreover, gene function analysis revealed that the two genes involved in energy metabolism displayed antiviral effects. Conclusions Collectively, these results revealed genome-wide variations in DNA methylation between grass carp of different ages. DNA methylation and gene expression variations in genes involved in immune response, biosynthesis, and energy production may contribute to age-dependent susceptibility to GCRV in grass carp. Our results provide important information for disease-resistant breeding programs for grass carp and may also benefit research on age-dependent diseases in humans. Supplementary Information The online version contains supplementary material available at 10.1186/s12979-022-00285-w.
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Guerrero-Arguero I, Tellez-Freitas CM, Weber KS, Berges BK, Robison RA, Pickett BE. Alphaviruses: Host pathogenesis, immune response, and vaccine & treatment updates. J Gen Virol 2021; 102. [PMID: 34435944 DOI: 10.1099/jgv.0.001644] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Human pathogens belonging to the Alphavirus genus, in the Togaviridae family, are transmitted primarily by mosquitoes. The signs and symptoms associated with these viruses include fever and polyarthralgia, defined as joint pain and inflammation, as well as encephalitis. In the last decade, our understanding of the interactions between members of the alphavirus genus and the human host has increased due to the re-appearance of the chikungunya virus (CHIKV) in Asia and Europe, as well as its emergence in the Americas. Alphaviruses affect host immunity through cytokines and the interferon response. Understanding alphavirus interactions with both the innate immune system as well as the various cells in the adaptive immune systems is critical to developing effective therapeutics. In this review, we summarize the latest research on alphavirus-host cell interactions, underlying infection mechanisms, and possible treatments.
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Affiliation(s)
- Israel Guerrero-Arguero
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, USA.,Texas Biomedical Research Institute, San Antonio, TX, USA
| | | | - K Scott Weber
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, USA
| | - Bradford K Berges
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, USA
| | - Richard A Robison
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, USA
| | - Brett E Pickett
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, USA
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Yermanos A, Neumeier D, Sandu I, Borsa M, Waindok AC, Merkler D, Oxenius A, Reddy ST. Single-cell immune repertoire and transcriptome sequencing reveals that clonally expanded and transcriptionally distinct lymphocytes populate the aged central nervous system in mice. Proc Biol Sci 2021; 288:20202793. [PMID: 33622131 DOI: 10.1098/rspb.2020.2793] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Neuroinflammation plays a crucial role during ageing and various neurological conditions, including Alzheimer's disease, multiple sclerosis and infection. Technical limitations, however, have prevented an integrative analysis of how lymphocyte immune receptor repertoires and their accompanying transcriptional states change with age in the central nervous system. Here, we leveraged single-cell sequencing to simultaneously profile B cell receptor and T cell receptor repertoires and accompanying gene expression profiles in young and old mouse brains. We observed the presence of clonally expanded B and T cells in the central nervous system of aged male mice. Furthermore, many of these B cells were of the IgM and IgD isotypes, and had low levels of somatic hypermutation. Integrating gene expression information additionally revealed distinct transcriptional profiles of these clonally expanded lymphocytes. Our findings implicate that clonally related T and B cells in the CNS of elderly mice may contribute to neuroinflammation accompanying homeostatic ageing.
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Affiliation(s)
- Alexander Yermanos
- Department of Biosystems and Engineering, ETH Zurich, Basel, Switzerland.,Institute of Microbiology, ETH Zurich, Zurich, Switzerland.,Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
| | - Daniel Neumeier
- Department of Biosystems and Engineering, ETH Zurich, Basel, Switzerland
| | - Ioana Sandu
- Institute of Microbiology, ETH Zurich, Zurich, Switzerland
| | - Mariana Borsa
- Institute of Microbiology, ETH Zurich, Zurich, Switzerland.,Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | | | - Doron Merkler
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland.,Division of Clinical Pathology, Geneva University Hospital, Geneva, Switzerland
| | | | - Sai T Reddy
- Department of Biosystems and Engineering, ETH Zurich, Basel, Switzerland
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Analysis of Multiple Risk Factors for Seronegative Rate of Anti-Tick-Borne Encephalitis Virus Immunization in Human Serum. ACTA ACUST UNITED AC 2020; 56:medicina56050244. [PMID: 32443896 PMCID: PMC7279439 DOI: 10.3390/medicina56050244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/04/2020] [Accepted: 05/15/2020] [Indexed: 11/25/2022]
Abstract
Background and objectives: Tick-borne encephalitis virus (TBEV) infections have been the cause of threatening outbreaks for many years. Apart from several physical and chemical methods to prevent tick bites, active vaccination of people highly exposed to infection is still the most important strategy of prevention. However, in some subjects, the lack of or low response to TBEV antigens is observed. The aim of the current study was to assess the prevalence of seronegative rate for anti-TBEV antibodies and the risk factors for waning immunity. Materials and Methods: 2315 at least primary vaccinated subjects from the high risk group for TBEV infections participated in this study. A commercial enzyme-linked immunosorbent assay (ELISA) test was used for the assessment of anti-TBEV IgG serum level. Results: Data showed that 86.2% of subjects who underwent vaccination were positive for anti-TBEV antibodies within 5 years. As much as 13.8% of subjects that underwent primary or primary and booster vaccination were barely protected after vaccination. Women and subjects under 60 years underwent more effective protection but sex and older age was not a risk factor for being a subject of waning immunity. A logistic regression showed that both a longer time since the vaccination and a lower number of booster doses constantly increased the chance of lost anti-TBEV antibodies. Conclusions: This study demonstrates that the vaccination schedule should be reevaluated. The extension of the interval of booster immunization is risky and all subjects should be surrounded by care consisting of more frequent monitoring of serum antibodies by personalized schedule to adjust the frequency of subsequent doses of booster vaccination.
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Cerbino-Neto J, Mesquita EC, Amancio RT, Brasil PEAAD. Events preceding death among chikungunya virus infected patients: a systematic review. Rev Soc Bras Med Trop 2020; 53:e04312019. [PMID: 32401863 PMCID: PMC7269536 DOI: 10.1590/0037-8682-0431-2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 03/24/2020] [Indexed: 12/20/2022] Open
Abstract
Since its re-emergence in the late 1990s, there have been reports of Chikungunya fever (CHIK-F) presenting with severe or atypical findings. There is little knowledge regarding the clinical events leading to the death of patients with CHIK-F. This study aimed to systematically review the literature regarding CHIK-F and identify clinical features preceding death. We searched PubMed, Scopus, Embase, Lilacs, and IsiWeb for case-reports, case-series, or cohorts of CHIK-F reporting at least one death, up to December 2019. Fifty-seven reports were analyzed, including 2140 deaths. Data about specific clinical events that precede death are scarce. The central tendency of time between disease onset and death ranged from 2 days to 150 days. The most common clinical findings among decedents were fever (22.0%), arthralgia (15.7%), myalgia (10.7%), and headache (8.2%). Excluding pediatric populations, the reported central tendency of age among the decedents was 53 or older, with a non-weighted median of 67, ranging up to 80 years old. Authors mentioned organic dysfunction in 91.2% reports. Among all the 2140 decedents, the most common dysfunctions were cardiovascular (7.2%), respiratory (6.4%), neurological (5.4%), renal (4.2%), liver (3.0%), and hematological (1.3%) dysfunction. Exacerbation of previous diabetes (5.6%) or hypertension (6.9%) was mentioned as conditions preceding death. Currently, older age, primary neurological, cardiovascular, or respiratory dysfunction and a previous diagnosis of diabetes or hypertension are the main clinical events preceding death.
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Affiliation(s)
- José Cerbino-Neto
- Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | | | - Rodrigo Teixeira Amancio
- Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
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Dias CNDS, Gois BM, Lima VS, Guerra-Gomes IC, Araújo JMG, Gomes JDAS, Araújo DAM, Medeiros IA, Azevedo FDLAAD, Veras RC, Janebro DI, Amaral IPGD, Keesen TSL. Human CD8 T-cell activation in acute and chronic chikungunya infection. Immunology 2018; 155:499-504. [PMID: 30099739 DOI: 10.1111/imm.12992] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/11/2018] [Accepted: 08/06/2018] [Indexed: 01/06/2023] Open
Abstract
There is a need for more detailed elucidation of T-cell immunity in chikungunya infection. CD8 T cells are one of main actors against viruses. Here, we analysed CD8+ T lymphocytes from patients in the acute and chronic phases of chikungunya disease (CHIKD). Our results demonstrate that CD8+ T cells expressed higher ex vivo granzyme B, perforin and CD107A expression in patients in the acute phase of CHIKD compared with healthy individuals and higher ex vivo expression of CD69, interleukin-17A, interleukin-10 and CD95 ligand, and co-expression of CD95/CD95 ligand. These results elucidate the importance of these lymphocytes, demonstrating immune mechanisms mediated in human chikungunya infection.
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Affiliation(s)
- Cinthia Nóbrega de Sousa Dias
- Immunology of Infectious Diseases Laboratory of Department of Cellular and Molecular Biology of Federal University of Paraíba, João Pessoa, Paraíba, Brazil
| | - Bruna Macêdo Gois
- Immunology of Infectious Diseases Laboratory of Department of Cellular and Molecular Biology of Federal University of Paraíba, João Pessoa, Paraíba, Brazil
| | - Viviane Silva Lima
- Immunology of Infectious Diseases Laboratory of Department of Cellular and Molecular Biology of Federal University of Paraíba, João Pessoa, Paraíba, Brazil
| | - Isabel Cristina Guerra-Gomes
- Immunology of Infectious Diseases Laboratory of Department of Cellular and Molecular Biology of Federal University of Paraíba, João Pessoa, Paraíba, Brazil
| | - Josélio Maria Galvão Araújo
- Molecular Biology of Cancer and Infectious Diseases Laboratory of Post-Graduation Programme on Parasite Biology, Federal University of Rio Grande do Norte, Natal, Brazil
| | - Juliana de Assis Silva Gomes
- Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | - Isac Almeida Medeiros
- Research Institute for Drugs and Medicines, Federal University of Paraíba, João Pessoa, Brazil
| | | | - Robson Cavalcanti Veras
- Research Institute for Drugs and Medicines, Federal University of Paraíba, João Pessoa, Brazil
| | - Daniele Idalino Janebro
- Immunology of Infectious Diseases Laboratory of Department of Cellular and Molecular Biology of Federal University of Paraíba, João Pessoa, Paraíba, Brazil
| | | | - Tatjana Souza Lima Keesen
- Immunology of Infectious Diseases Laboratory of Department of Cellular and Molecular Biology of Federal University of Paraíba, João Pessoa, Paraíba, Brazil.,Department of Cellular and Molecular Biology, Federal University of Paraiba, João Pessoa, Brazil
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Altmann DM. Mapping innate and adaptive immune function in arbovirus infections. Immunology 2018; 154:1-2. [PMID: 29667753 PMCID: PMC5904694 DOI: 10.1111/imm.12932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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