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The ageing immune system as a potential target of senolytics. 衰老的免疫系统是抗衰老的潜在靶点。
Oxford open immunology Pub Date : 2023-01-01 DOI: 10.1093/oxfimm/iqad004
Peter Yandi Du, Ankesh Gandhi, Manraj Bawa, Justyna Gromala
{"title":"The ageing immune system as a potential target of senolytics.","authors":"Peter Yandi Du,&nbsp;Ankesh Gandhi,&nbsp;Manraj Bawa,&nbsp;Justyna Gromala","doi":"10.1093/oxfimm/iqad004","DOIUrl":"https://doi.org/10.1093/oxfimm/iqad004","url":null,"abstract":"<p><p>Ageing leads to a sharp decline in immune function, precipitating the development of inflammatory conditions. The combined impact of these processes renders older individuals at greater risk of inflammatory and immune-related diseases, such as cancer and infections. This is compounded by reduced efficacy in interventions aiming to limit disease impact, for instance vaccines being less effective in elderly populations. This state of diminished cellular function is driven by cellular senescence, a process where cells undergo stable growth arrest following exposure to stressful stimuli, and the associated pro-inflammatory secretory phenotype. Removing harmful senescent cells (SnCs) using senolytic therapies is an emerging field holding promise for patient benefit. Current senolytics have been developed either to specifically target SnCs, or repurposed from cancer therapies or vaccination protocols. Herein, we discuss recent developments in senolytic therapies, focusing on how senolytics could be used to combat the age-associated diminution of the immune system. In particular, exploring how these drugs may be used to promote immunity in the elderly, and highlighting recent trials of senolytics in idiopathic pulmonary fibrosis and diabetic kidney disease. Novel immunotherapeutic approaches including chimeric antigen receptor T-cells or monoclonal antibodies targeting SnCs are being investigated to combat the shortcomings of current senolytics and their adverse effects. The flexible nature of senolytic treatment modalities and their efficacy in safely removing harmful SnCs could have great potential to promote healthy immune function in ageing populations.</p>","PeriodicalId":74384,"journal":{"name":"Oxford open immunology","volume":"4 1","pages":"iqad004"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10191675/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9551425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Autoimmunity in Long Covid and POTS. 长Covid和POTS的自身免疫。
Oxford open immunology Pub Date : 2023-01-01 DOI: 10.1093/oxfimm/iqad002
Fatema-Zahra El-Rhermoul, Artur Fedorowski, Philip Eardley, Patricia Taraborrelli, Dimitrios Panagopoulos, Richard Sutton, Phang Boon Lim, Melanie Dani
{"title":"Autoimmunity in Long Covid and POTS.","authors":"Fatema-Zahra El-Rhermoul,&nbsp;Artur Fedorowski,&nbsp;Philip Eardley,&nbsp;Patricia Taraborrelli,&nbsp;Dimitrios Panagopoulos,&nbsp;Richard Sutton,&nbsp;Phang Boon Lim,&nbsp;Melanie Dani","doi":"10.1093/oxfimm/iqad002","DOIUrl":"https://doi.org/10.1093/oxfimm/iqad002","url":null,"abstract":"<p><p>Orthostatic intolerance and other autonomic dysfunction syndromes are emerging as distinct symptom clusters in Long Covid. Often accompanying these are common, multi-system constitutional features such as fatigue, malaise and skin rashes which can signify generalized immune dysregulation. At the same time, multiple autoantibodies are identified in both Covid-related autonomic disorders and non-Covid autonomic disorders, implying a possible underlying autoimmune pathology. The lack of specificity of these findings precludes direct interpretations of cause and association, but their prevalence with its supporting evidence is compelling.</p>","PeriodicalId":74384,"journal":{"name":"Oxford open immunology","volume":"4 1","pages":"iqad002"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10224806/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9924305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Achieving symptom relief in patients with myalgic encephalomyelitis by targeting the neuro-immune interface and optimizing disease tolerance. 通过靶向神经免疫界面和优化疾病耐受性实现肌痛性脑脊髓炎患者的症状缓解。
Oxford open immunology Pub Date : 2023-01-01 DOI: 10.1093/oxfimm/iqad003
Lucie Rodriguez, Christian Pou, Tadepally Lakshmikanth, Jingdian Zhang, Constantin Habimana Mugabo, Jun Wang, Jaromir Mikes, Axel Olin, Yang Chen, Joanna Rorbach, Jan-Erik Juto, Tie Qiang Li, Per Julin, Petter Brodin
{"title":"Achieving symptom relief in patients with myalgic encephalomyelitis by targeting the neuro-immune interface and optimizing disease tolerance.","authors":"Lucie Rodriguez,&nbsp;Christian Pou,&nbsp;Tadepally Lakshmikanth,&nbsp;Jingdian Zhang,&nbsp;Constantin Habimana Mugabo,&nbsp;Jun Wang,&nbsp;Jaromir Mikes,&nbsp;Axel Olin,&nbsp;Yang Chen,&nbsp;Joanna Rorbach,&nbsp;Jan-Erik Juto,&nbsp;Tie Qiang Li,&nbsp;Per Julin,&nbsp;Petter Brodin","doi":"10.1093/oxfimm/iqad003","DOIUrl":"https://doi.org/10.1093/oxfimm/iqad003","url":null,"abstract":"<p><p>Myalgic encephalomyelitis (ME) previously also known as chronic fatigue syndrome is a heterogeneous, debilitating syndrome of unknown etiology responsible for long-lasting disability in millions of patients worldwide. The most well-known symptom of ME is post-exertional malaise, but many patients also experience autonomic dysregulation, cranial nerve dysfunction and signs of immune system activation. Many patients also report a sudden onset of disease following an infection. The brainstem is a suspected focal point in ME pathogenesis and patients with structural impairment to the brainstem often show ME-like symptoms. The brainstem is also where the vagus nerve originates, a critical neuro-immune interface and mediator of the inflammatory reflex which regulate systemic inflammation. Here, we report the results of a randomized, placebo-controlled trial using intranasal mechanical stimulation targeting nerve endings in the nasal cavity, likely from the trigeminal nerve, possibly activating additional centers in the brainstem of ME patients and correlating with a ∼30% reduction in overall symptom scores after 8 weeks of treatment. By performing longitudinal, systems-level monitoring of the blood immune system in these patients, we uncover signs of chronic immune activation in ME, as well as immunological correlates of improvement that center around gut-homing immune cells and reduced inflammation. The mechanisms of symptom relief remain to be determined, but transcriptional analyses suggest an upregulation of disease tolerance mechanisms. We believe that these results are suggestive of ME as a condition explained by a maladaptive disease tolerance response following infection.</p>","PeriodicalId":74384,"journal":{"name":"Oxford open immunology","volume":"4 1","pages":"iqad003"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10148714/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9924307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A cellular overview of immunometabolism in systemic lupus erythematosus. 系统性红斑狼疮免疫代谢的细胞综述。
Oxford open immunology Pub Date : 2023-01-01 DOI: 10.1093/oxfimm/iqad005
Antonios Psarras, Alexander Clarke
{"title":"A cellular overview of immunometabolism in systemic lupus erythematosus.","authors":"Antonios Psarras,&nbsp;Alexander Clarke","doi":"10.1093/oxfimm/iqad005","DOIUrl":"https://doi.org/10.1093/oxfimm/iqad005","url":null,"abstract":"<p><p>Systemic lupus erythematosus (SLE) is a complex autoimmune disease, characterized by a breakdown of immune tolerance and the development of autoantibodies against nucleic self-antigens. Immunometabolism is a rapidly expanding scientific field investigating the metabolic programming of cells of the immune system. During the normal immune response, extensive reprogramming of cellular metabolism occurs, both to generate adenosine triphosphate and facilitate protein synthesis, and also to manage cellular stress. Major pathways upregulated include glycolysis, oxidative phosphorylation, the tricarboxylic acid cycle and the pentose phosphate pathway, among others. Metabolic reprogramming also occurs to aid resolution of inflammation. Immune cells of both patients with SLE and lupus-prone mice are characterized by metabolic abnormalities resulting in an altered functional and inflammatory state. Recent studies have described how metabolic reprogramming occurs in many cell populations in SLE, particularly CD4<sup>+</sup> T cells, e.g. favouring a glycolytic profile by overactivation of the mechanistic target of rapamycin pathway. These advances have led to an increased understanding of the metabolic changes affecting the inflammatory profile of T and B cells, monocytes, dendritic cells and neutrophils, and how they contribute to autoimmunity and SLE pathogenesis. In the current review, we aim to summarize recent advances in the field of immunometabolism involved in SLE and how these could potentially lead to new therapeutic strategies in the future.</p>","PeriodicalId":74384,"journal":{"name":"Oxford open immunology","volume":"4 1","pages":"iqad005"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10264559/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9956748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Combating the challenges of COVID-19 pandemic: Insights into molecular mechanisms, immune responses and therapeutics against SARS-CoV-2. 应对COVID-19大流行的挑战:洞察SARS-CoV-2的分子机制、免疫反应和治疗方法。
Oxford open immunology Pub Date : 2023-01-01 DOI: 10.1093/oxfimm/iqad001
Kriti Negi, Meetu Agarwal, Isha Pahuja, Bhavya Bhardwaj, Mansi Rawat, Ashima Bhaskar, Ved Prakash Dwivedi
{"title":"Combating the challenges of COVID-19 pandemic: Insights into molecular mechanisms, immune responses and therapeutics against SARS-CoV-2.","authors":"Kriti Negi,&nbsp;Meetu Agarwal,&nbsp;Isha Pahuja,&nbsp;Bhavya Bhardwaj,&nbsp;Mansi Rawat,&nbsp;Ashima Bhaskar,&nbsp;Ved Prakash Dwivedi","doi":"10.1093/oxfimm/iqad001","DOIUrl":"https://doi.org/10.1093/oxfimm/iqad001","url":null,"abstract":"<p><p>Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection causes lethal coronavirus disease (COVID-19). SARS-CoV-2 has been the chief source of threat to public health and safety from 2019 to the present. SARS-CoV-2 caused a sudden and significant rise in hospitalization due to respiratory issues and pneumonia. We are consistently uncovering new information about SARS-CoV-2, and yet so much is to explore to implement efficient interventions to combat the emergent variants and spread of the ongoing pandemic. Information regarding the existing COVID-19 pandemic is streamlining continuously. However, clinical symptoms of SARS-CoV-2 infections spanning from asymptomatic infection to severe death-instigating disease remain consistent with preliminary reports. In this review, we have briefly introduced highlights of the COVID-19 pandemic and features of SARS-CoV-2. We have focused on current knowledge of innate and adaptive immune responses during SARS-CoV-2 infections and persisting clinical features of recovered patients. Furthermore, we have discussed how these immune responses are not tightly regulated and imbalance can direct the latter phases of COVID-19, long-COVID symptoms, and cause detrimental immunopathogenesis. COVID-19 vaccines are also discussed in detail to describe the efforts going around the world to control and prevent the infection. Overall, we have summarized the current knowledge on the immunology of SARS-CoV-2 infection and the utilization of that knowledge in the development of a suitable COVID-19 therapeutics and vaccines.</p>","PeriodicalId":74384,"journal":{"name":"Oxford open immunology","volume":"4 1","pages":"iqad001"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9985161/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9305129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Long COVID: a narrative review of the clinical aftermaths of COVID-19 with a focus on the putative pathophysiology and aspects of physical activity. 长COVID:对COVID-19临床后果的叙述性回顾,重点是推测的病理生理学和体育锻炼方面。
Oxford open immunology Pub Date : 2022-09-16 eCollection Date: 2022-01-01 DOI: 10.1093/oxfimm/iqac006
Simon Haunhorst, Wilhelm Bloch, Heiko Wagner, Claudia Ellert, Karsten Krüger, Daniel C Vilser, Kathrin Finke, Philipp Reuken, Mathias W Pletz, Andreas Stallmach, Christian Puta
{"title":"Long COVID: a narrative review of the clinical aftermaths of COVID-19 with a focus on the putative pathophysiology and aspects of physical activity.","authors":"Simon Haunhorst, Wilhelm Bloch, Heiko Wagner, Claudia Ellert, Karsten Krüger, Daniel C Vilser, Kathrin Finke, Philipp Reuken, Mathias W Pletz, Andreas Stallmach, Christian Puta","doi":"10.1093/oxfimm/iqac006","DOIUrl":"10.1093/oxfimm/iqac006","url":null,"abstract":"<p><p>The pandemic coronavirus disease 2019 (COVID-19) can cause multi-systemic symptoms that can persist beyond the acute symptomatic phase. The post-acute sequelae of COVID-19 (PASC), also referred to as long COVID, describe the persistence of symptoms and/or long-term complications beyond 4 weeks from the onset of the acute symptoms and are estimated to affect at least 20% of the individuals infected with SARS-CoV-2 regardless of their acute disease severity. The multi-faceted clinical picture of long COVID encompasses a plethora of undulating clinical manifestations impacting various body systems such as fatigue, headache, attention disorder, hair loss and exercise intolerance. The physiological response to exercise testing is characterized by a reduced aerobic capacity, cardiocirculatory limitations, dysfunctional breathing patterns and an impaired ability to extract and use oxygen. Still, to this day, the causative pathophysiological mechanisms of long COVID remain to be elucidated, with long-term organ damage, immune system dysregulation and endotheliopathy being among the hypotheses discussed. Likewise, there is still a paucity of treatment options and evidence-based strategies for the management of the symptoms. In sum, this review explores different aspects of long COVID and maps the literature on what is known about its clinical manifestations, potential pathophysiological mechanisms, and treatment options.</p>","PeriodicalId":74384,"journal":{"name":"Oxford open immunology","volume":"3 1","pages":"iqac006"},"PeriodicalIF":0.0,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9494493/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10851761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
SARS-CoV-2 immunity and vaccine strategies in people with HIV. 艾滋病毒感染者的 SARS-CoV-2 免疫力和疫苗策略。
Oxford open immunology Pub Date : 2022-08-17 eCollection Date: 2022-01-01 DOI: 10.1093/oxfimm/iqac005
Claire Mullender, Kelly A S da Costa, Aljawharah Alrubayyi, Sarah L Pett, Dimitra Peppa
{"title":"SARS-CoV-2 immunity and vaccine strategies in people with HIV.","authors":"Claire Mullender, Kelly A S da Costa, Aljawharah Alrubayyi, Sarah L Pett, Dimitra Peppa","doi":"10.1093/oxfimm/iqac005","DOIUrl":"10.1093/oxfimm/iqac005","url":null,"abstract":"<p><p>Current severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) vaccines, based on the ancestral Wuhan strain, were developed rapidly to meet the needs of a devastating global pandemic. People living with Human Immunodeficiency Virus (PLWH) have been designated as a priority group for SARS-CoV-2 vaccination in most regions and varying primary courses (two- or three-dose schedule) and additional boosters are recommended depending on current CD4+ T cell count and/or detectable HIV viraemia. From the current published data, licensed vaccines are safe for PLWH, and stimulate robust responses to vaccination in those well controlled on antiretroviral therapy and with high CD4+ T cell counts. Data on vaccine efficacy and immunogenicity remain, however, scarce in PLWH, especially in people with advanced disease. A greater concern is a potentially diminished immune response to the primary course and subsequent boosters, as well as an attenuated magnitude and durability of protective immune responses. A detailed understanding of the breadth and durability of humoral and T cell responses to vaccination, and the boosting effects of natural immunity to SARS-CoV-2, in more diverse populations of PLWH with a spectrum of HIV-related immunosuppression is therefore critical. This article summarizes focused studies of humoral and cellular responses to SARS-CoV-2 infection in PLWH and provides a comprehensive review of the emerging literature on SARS-CoV-2 vaccine responses. Emphasis is placed on the potential effect of HIV-related factors and presence of co-morbidities modulating responses to SARS-CoV-2 vaccination, and the remaining challenges informing the optimal vaccination strategy to elicit enduring responses against existing and emerging variants in PLWH.</p>","PeriodicalId":74384,"journal":{"name":"Oxford open immunology","volume":"3 1","pages":"iqac005"},"PeriodicalIF":0.0,"publicationDate":"2022-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9452103/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9483639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polymer formulated self-amplifying RNA vaccine is partially protective against influenza virus infection in ferrets. 聚合物配制的自扩增RNA疫苗对雪貂流感病毒感染具有部分保护作用。
Oxford open immunology Pub Date : 2022-06-27 eCollection Date: 2022-01-01 DOI: 10.1093/oxfimm/iqac004
P F McKay, J Zhou, R Frise, A K Blakney, C R Bouton, Z Wang, K Hu, K Samnuan, J C Brown, R Kugathasan, J Yeow, M M Stevens, W S Barclay, J S Tregoning, R J Shattock
{"title":"Polymer formulated self-amplifying RNA vaccine is partially protective against influenza virus infection in ferrets.","authors":"P F McKay,&nbsp;J Zhou,&nbsp;R Frise,&nbsp;A K Blakney,&nbsp;C R Bouton,&nbsp;Z Wang,&nbsp;K Hu,&nbsp;K Samnuan,&nbsp;J C Brown,&nbsp;R Kugathasan,&nbsp;J Yeow,&nbsp;M M Stevens,&nbsp;W S Barclay,&nbsp;J S Tregoning,&nbsp;R J Shattock","doi":"10.1093/oxfimm/iqac004","DOIUrl":"https://doi.org/10.1093/oxfimm/iqac004","url":null,"abstract":"<p><p>COVID-19 has demonstrated the power of RNA vaccines as part of a pandemic response toolkit. Another virus with pandemic potential is influenza. Further development of RNA vaccines in advance of a future influenza pandemic will save time and lives. As RNA vaccines require formulation to enter cells and induce antigen expression, the aim of this study was to investigate the impact of a recently developed bioreducible cationic polymer, pABOL for the delivery of a self-amplifying RNA (saRNA) vaccine for seasonal influenza virus in mice and ferrets. Mice and ferrets were immunized with pABOL formulated saRNA vaccines expressing either haemagglutinin (HA) from H1N1 or H3N2 influenza virus in a prime boost regime. Antibody responses, both binding and functional were measured in serum after immunization. Animals were then challenged with a matched influenza virus either directly by intranasal inoculation or in a contact transmission model. While highly immunogenic in mice, pABOL-formulated saRNA led to variable responses in ferrets. Animals that responded to the vaccine with higher levels of influenza virus-specific neutralizing antibodies were more protected against influenza virus infection. pABOL-formulated saRNA is immunogenic in ferrets, but further optimization of RNA vaccine formulation and constructs is required to increase the quality and quantity of the antibody response to the vaccine.</p>","PeriodicalId":74384,"journal":{"name":"Oxford open immunology","volume":" ","pages":"iqac004"},"PeriodicalIF":0.0,"publicationDate":"2022-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9384352/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40419531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The past, current and future epidemiological dynamic of SARS-CoV-2. 严重急性呼吸系统综合征冠状病毒2型过去、现在和未来的流行病学动态。
Oxford open immunology Pub Date : 2022-06-20 eCollection Date: 2022-01-01 DOI: 10.1093/oxfimm/iqac003
François Balloux, Cedric Tan, Leo Swadling, Damien Richard, Charlotte Jenner, Mala Maini, Lucy van Dorp
{"title":"The past, current and future epidemiological dynamic of SARS-CoV-2.","authors":"François Balloux, Cedric Tan, Leo Swadling, Damien Richard, Charlotte Jenner, Mala Maini, Lucy van Dorp","doi":"10.1093/oxfimm/iqac003","DOIUrl":"10.1093/oxfimm/iqac003","url":null,"abstract":"<p><p>SARS-CoV-2, the agent of the COVID-19 pandemic, emerged in late 2019 in China, and rapidly spread throughout the world to reach all continents. As the virus expanded in its novel human host, viral lineages diversified through the accumulation of around two mutations a month on average. Different viral lineages have replaced each other since the start of the pandemic, with the most successful Alpha, Delta and Omicron variants of concern (VoCs) sequentially sweeping through the world to reach high global prevalence. Neither Alpha nor Delta was characterized by strong immune escape, with their success coming mainly from their higher transmissibility. Omicron is far more prone to immune evasion and spread primarily due to its increased ability to (re-)infect hosts with prior immunity. As host immunity reaches high levels globally through vaccination and prior infection, the epidemic is expected to transition from a pandemic regime to an endemic one where seasonality and waning host immunization are anticipated to become the primary forces shaping future SARS-CoV-2 lineage dynamics. In this review, we consider a body of evidence on the origins, host tropism, epidemiology, genomic and immunogenetic evolution of SARS-CoV-2 including an assessment of other coronaviruses infecting humans. Considering what is known so far, we conclude by delineating scenarios for the future dynamic of SARS-CoV-2, ranging from the good-circulation of a fifth endemic 'common cold' coronavirus of potentially low virulence, the bad-a situation roughly comparable with seasonal flu, and the ugly-extensive diversification into serotypes with long-term high-level endemicity.</p>","PeriodicalId":74384,"journal":{"name":"Oxford open immunology","volume":"3 1","pages":"iqac003"},"PeriodicalIF":0.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9278178/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9194329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Long Covid brain fog: a neuroinflammation phenomenon? 长冠脑雾:一种神经炎症现象?
Oxford open immunology Pub Date : 2022-01-01 DOI: 10.1093/oxfimm/iqac007
Emma Kavanagh
{"title":"Long Covid brain fog: a neuroinflammation phenomenon?","authors":"Emma Kavanagh","doi":"10.1093/oxfimm/iqac007","DOIUrl":"https://doi.org/10.1093/oxfimm/iqac007","url":null,"abstract":"<p><p>Neuroinflammation is a process triggered by an attack on the immune system. Activation of microglia in response to an immune system challenge can lead to a significant impact on cognitive processes, such as learning, memory and emotional regulation. Long Covid is an ongoing problem, affecting an estimated 1.3 million people within the UK alone, and one of its more significant, and as yet unexplained, symptoms is brain fog. Here, we discuss the potential role of neuroinflammation in Long Covid cognitive difficulties. Inflammatory cytokines have been found to play a significant role in reductions in LTP and LTD, a reduction in neurogenesis, and in dendritic sprouting. The potential behavioural consequences of such impacts are discussed. It is hoped that this article will allow for greater examination of the effects of inflammatory factors on brain function, most particularly in terms of their role in chronic conditions.</p>","PeriodicalId":74384,"journal":{"name":"Oxford open immunology","volume":"3 1","pages":"iqac007"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9914477/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9358043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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