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1.
Yaoxue Xuebao ; 58(4):928-937, 2023.
Article in Chinese | EMBASE | ID: covidwho-20244443

ABSTRACT

Dayuanyin (DYY) has been shown to reduce lung inflammation in both coronavirus disease 2019 (COVID-19) and lung injury. This experiment was designed to investigate the efficacy and mechanism of action of DYY against hypoxic pulmonary hypertension (HPH) and to evaluate the effect of DYY on the protection of lung function. Animal welfare and experimental procedures are approved and in accordance with the provision of the Animal Ethics Committee of the Institute of Materia Medica, Chinese Academy of Medical Science. Male C57/BL6J mice were randomly divided into 4 groups: control group, model group, DYY group (800 mg.kg-1), and positive control sildenafil group (100 mg.kg-1). The animals were given control solvents or drugs by gavage three days in advance. On day 4, the animals in the model group, DYY group and sildenafil group were kept in a hypoxic chamber containing 10% +/- 0.5% oxygen, and the animals in the control group were kept in a normal environment, and the control solvent or drugs continued to be given continuously for 14 days. The right ventricular systolic pressure, right ventricular hypertrophy index, organ indices and other metrics were measured in the experimental endpoints. Meantime, the expression levels of the inflammatory factors in mice lung tissues were measured. The potential therapeutic targets of DYY on pulmonary hypertension were predicted using network pharmacology, the expression of nuclear factor kappa B (NF- kappaB) signaling pathway-related proteins were measured by Western blot assay. It was found that DYY significantly reduced the right ventricular systolic pressure, attenuated lung injury and decreased the expression of inflammatory factors in mice. It can also inhibit hypoxia-induced activation of NF- kappaB signaling pathway. DYY has a protective effect on lung function, as demonstrated by DYY has good efficacy in HPH, and preventive administration can slow down the disease progression, and its mechanism may be related to inhibit the activation of NF-kappaB and signal transducer and activator of transcription 3 (STAT3) by DYY.Copyright © 2023, Chinese Pharmaceutical Association. All rights reserved.

2.
Obstetrics & Gynecology ; 141(5):96S-96S, 2023.
Article in English | Academic Search Complete | ID: covidwho-20242571

ABSTRACT

INTRODUCTION: In 2020, obstetrics and gynecology residency programs switched to a virtual interview format because of the COVID-19 pandemic. Most programs have continued to conduct virtual interviews. In 2022, program signaling was introduced to allow candidates applying to obstetrics and gynecology residencies to indicate interest in specific programs. The objective of this study is to survey medical student residency applicants and program directors about their perceptions of the process. METHODS: Education for All (EFA) developed a validated survey assessing student and residency program director perceptions. This survey was distributed online to all residency applicants and program directors who registered for the 2022 EFA Residency Fair. RESULTS: Five hundred six obstetrics and gynecology residency applicants and 33 program directors responded. 37% applicants indicated that virtual interviews would probably provide enough information to create a rank list, but 36% were not sure. 37% of students and 50% of residency programs indicated the process should continue to be virtual. Ninety-one percent of students indicated they would "definitely" use signaling, and 66% of program directors said signaling "might or might not" improve the application process. In a free-text section, many applicants expressed concern with the virtual interview process. CONCLUSION: Fifty percent of residency programs and the majority of residency applicants are unsure if interviews should continue to be virtual. Nearly all candidates planned to use program signaling, but the majority of program directors were unsure if this would improve the application process. Further study is necessary to determine whether program signaling and virtual interviews should be continued in the future. [ FROM AUTHOR] Copyright of Obstetrics & Gynecology is the property of Lippincott Williams & Wilkins and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full . (Copyright applies to all s.)

3.
Journal of Urology ; 209(6):1216-1218, 2023.
Article in English | EMBASE | ID: covidwho-20240536
4.
Brazilian Archives of Biology and Technology ; 66, 2023.
Article in English | Web of Science | ID: covidwho-20239830

ABSTRACT

The Severe Acute Respiratory Syndrome Coronavirus-2 causes a dreadful Coronavirus Disease namely COVID-19. Respiratory system is the primary target of the virus. It also impairs other major organs such as kidney, heart, liver, brain etc. Multiple novel variants of SARS-CoV-2 have appeared since the SARS-CoV-2 pandemic occurred which are linked to increased virulence, disease transmission and severity. The virus attacks the host signalling pathways to maintain a favourable environment for its spread. The present study focuses on the comprehensive analysis of major signaling pathways affected due to several variants of SARS-CoV-2 leading to abnormalities in cell growth and differentiation. The information was curated from the weblinks of several platforms like WHO, CDC, PANGO, Nextstrain clade and GISAID clade. The data on signaling pathways and comorbidities was generated by screening of different research and review articles. SARS-CoV-2 consolidates the cytoskeleton of the host for effective cell invasion and modulates the transcription processes to enable the translation of viral protein(s). These events lead to significant increase and prolonged hyper inflammation. Further, a decreased interferon (IFN) response along with increased interleukin production leading to cytokine storm is observed. Deregulation of interleukin pathways, TNF-alpha signalling through JAK/STAT-3 signalling, MAPK1, mTOR, PI3K are few other signalling pathways that are affected on SARS-CoV-2 infection. This review represents a comprehensive analysis of the vigorous life cycle of SARS CoV-2, its different variants affecting host signalling pathways which eventually cause dysfunctioning of several organs and development of comorbidities.

5.
Frontiers of COVID-19: Scientific and Clinical Aspects of the Novel Coronavirus 2019 ; : 67-111, 2022.
Article in English | Scopus | ID: covidwho-20237149

ABSTRACT

The COVID-19 pandemic has put millions of lives at risk. SARS-CoV-2, the causative agent of COVID-19, primarily targets the respiratory system. The subsequent immune reactions may cause severe inflammation. The severe infection, disease progression, and dysregulated immune response can affect various sites of the body. Moreover, angiotensin-converting enzyme-2, the cellular receptor for viral entry, is expressed by different organs of the body. This hints at the possibility of virus infection and manifestations at miscellaneous sites. Indeed, COVID-19 patients with comorbidities like cardiovascular diseases, hypertension, diabetes, chronic kidney diseases, obesity, and immunosuppressive conditions have shown either increased disease severity, delayed viral clearance, or higher mortality. COVID-19 treatment with steroids and associated comorbidities like diabetes have also been shown to make people susceptible to lethal secondary infections like mucormycosis. Therefore, COVID-19 patients should be vigilantly monitored for symptoms and underlying conditions. In this regard, we comprehensively explained the aspects of COVID-19-associated comorbidities. As dysregulated inflammation is a key factor in worsening the disease conditions, we have also summarized the important molecular pathways associated with SARS-CoV-2 associated inflammation. This could further help researchers find targets for reducing COVID-19 inflammation and achieve better outcomes in comorbidity associated patients. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2022.

6.
Sustainability ; 15(11):9015, 2023.
Article in English | ProQuest Central | ID: covidwho-20236484

ABSTRACT

This study investigated consumer behaviors in conspicuous omni-signaling—its internal motivations and its consequences on social needs fulfilment and re-consumption intention in the context of luxury fashion. A phenomenon of conspicuous consumption is identified with the consumption and display of conspicuous goods to signal status, wealth, and prestige. Digital development has made conspicuous signaling radically emerge in social media through the posting of photos, videos, or stories of luxury goods. This drives an emerging phenomenon of conspicuous omni-signaling, the use of both offline and online media to signal conspicuous consumption hybridlike. As a new phenomenon, little is known of consumer behaviors related to conspicuous omni-signaling. To facilitate the investigation, an online survey was conducted to collect data from 474 valid respondents across eight cities representing various conspicuous consumption characteristics of Indonesian consumers. Veblen's conspicuous consumption and Maslow's hierarchy of needs theories were employed as the main lens for analysis. PLS-SEM technique was employed as the research model uses mixed reflective and formative constructs. WarpPLS 7.0 was then used for data analysis. The results indicated that luxury values and fashion consciousness positively affect conspicuous omni-signaling. This study also found that conspicuous omni-signaling affects conspicuous re-consumption both directly and indirectly through social needs fulfilment. This study contributes to extend the concept of conspicuous offline consumption and conspicuous online consumption to conspicuous omni-signaling. This study also confirms conflicting results in the effect of conspicuous consumption on social needs fulfilment, and conflicting results in the effect of conspicuous consumption on conspicuous re-consumption.

7.
Drug Repurposing for Emerging Infectious Diseases and Cancer ; : 37-45, 2023.
Article in English | Scopus | ID: covidwho-20236385

ABSTRACT

Pharmacovigilance involves evaluation of adverse effects of drugs in the interest of patient safety. Large-scale application of pharmacovigilance generates big datasets that are mined to identify previously unknown drug–event combinations, and, as an extension, may help in identifying new indications for old drugs. The therapeutic potential of a drug using pharmacovigilance-based drug repurposing can be assessed in one of the four ways—serendipity, mechanistic profiling, signature matching, and inverse signaling. Serendipity is the phenomenon of discovery of some valuable information for an already known drug, by chance, like minoxidil. Mechanistic profiling proposed the use of sulfonylureas for diabetes mellitus, based on the observation of their hypoglycemic effect. Signature matching is puzzling out new indications of drugs based on similarity of characteristics in a network of other drugs which are already approved for any condition. Inverse signaling approach takes cues from data mining approaches, applied to pharmacovigilance databases. Currently, this approach is being tried to evaluate existing compounds for Raynaud's phenomenon, COVID-19, Alzheimer' disease, etc. In this chapter, we discuss these pharmacovigilance-based methods as they have immense translational potential for drug repurposing. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

8.
Chinese Traditional and Herbal Drugs ; 54(8):2523-2535, 2023.
Article in Chinese | EMBASE | ID: covidwho-20235800

ABSTRACT

Objective To explore the core targets and important pathways of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) induced atherosclerosis (AS) progression from the perspective of immune inflammation, so as to predict the potential prevention and treatment of traditional Chinese medicine (TCM). Methods Microarray data were obtained from the Gene Expression Omnibus (GEO) database for coronavirus disease 2019 (COVID-19) patients and AS patients, and the "limmar" and "Venn" packages were used to screen out the common differentially expressed genes (DEGs) genes in both diseases. The gene ontology (GO) and Kyoto encyclopedia of genes and genomes (KEGG) analyses were performed on the common DEGs to annotate their functions and important pathways. The two gene sets were scored for immune cells and immune function to assess the level of immune cell infiltration. The protein-protein interaction (PPI) network was constructed by STRING database, and the CytoHubba plug-in of Cytoscape was used to identify the hub genes. Two external validation datasets were introduced to validate the hub genes and obtain the core genes. Immuno-infiltration analysis and gene set enrichment analysis (GSEA) were performed on the core genes respectively. Finally the potential TCM regulating the core genes were predicted by Coremine Medical database. Results A total of 7898 genes related to COVID-19, 471 genes related to AS progression;And 51 common DEGs, including 32 highly expressed genes and 19 low expressed genes were obtained. GO and KEGG analysis showed that common DEGs, which were mainly localized in cypermethrin-encapsulated vesicles, platelet alpha particles, phagocytic vesicle membranes and vesicles, were involved in many biological processes such as myeloid differentiation factor 88 (MyD88)-dependent Toll-like receptor signaling pathway transduction, interleukin-8 (IL-8) production and positive regulation, IL-6 production and positive regulation to play a role in regulating nicotinamide adenine dinucleotide phosphate oxidase activity, Toll-like receptor binding and lipopeptide and glycosaminoglycan binding through many biological pathways, including Toll-like receptor signaling pathways, neutrophil extracellular trap formation, complement and coagulation cascade reactions. The results of immune infiltration analysis demonstrated the state of immune microenvironment of COVID-19 and AS. A total of 5 hub genes were obtained after screening, among which Toll-like receptor 2 (TLR2), cluster of differentiation 163 (CD163) and complement C1q subcomponent subunit B (C1QB) genes passed external validation as core genes. The core genes showed strong correlation with immune process and inflammatory response in both immune infiltration analysis and GSEA enrichment analysis. A total of 35 TCMs, including Chuanxiong (Chuanxiong Rhizoma), Taoren (Persicae Semen), Danggui (Angelicae Sinensis Radix), Huangqin (Scutellariae Radix), Pugongying (Taraxaci Herba), Taizishen (Pseudostellariae Radix), Huangjing (Polygonati Rhizoma), could be used as potential therapeutic agents. Conclusion TLR2, CD163 and C1QB were the core molecules of SARS-CoV-2-mediated immune inflammatory response promoting AS progression, and targeting predicted herbs were potential drugs to slow down AS progression in COVID-19 patients.Copyright © 2023 Editorial Office of Chinese Traditional and Herbal Drugs. All rights reserved.

9.
Philosophical Psychology ; 36(5):969-989, 2023.
Article in English | ProQuest Central | ID: covidwho-20235729

ABSTRACT

Some collective irrationalities, like epistemically and pragmatically reckless Covid skepticism, are especially dangerous. While we normally have incentives to avoid dangerous beliefs, there are cases in which the danger of a belief is valuable. This is not captured by most accounts of motivated reasoning. I argue that Covid skepticism can function as a costly signal (handicap) so as to more effectively communicate social identity and commitment.

10.
Nieren und Hochdruckkrankheiten Conference ; 52(4), 2023.
Article in German | EMBASE | ID: covidwho-20232467

ABSTRACT

The proceedings contain 92 papers. The topics discussed include: cellular and humoral immune responses after SARS-CoV-2 vaccination in pediatric kidney recipients;adult outcomes of childhood-onset idiopathic nephrotic syndrome: findings from a health insurance database;the genetic landscape and clinical spectrum of nephronophthisis and related ciliopathies;translational profiling of developing podocytes during glomerulogenesis;MAGED2 is required under hypoxia for cAMP signaling by inhibiting MDM2-dependent endocytosis of G-Alpha-S;high throughput investigation of the metabolic flux of intact cortical kidney tubules;peritoneal membrane junction and solute transporter expression and function in health, CKD and PD;and Function and interaction of coronavirus ion channel proteins.

11.
Appl Math Model ; 122: 401-416, 2023 Oct.
Article in English | MEDLINE | ID: covidwho-20245397

ABSTRACT

Purpose: The ongoing COVID-19 pandemic imposes serious short-term and long-term health costs on populations. Restrictive government policy measures decrease the risks of infection, but produce similarly serious social, mental health, and economic problems. Citizens have varying preferences about the desirability of restrictive policies, and governments are thus forced to navigate this tension in making pandemic policy. This paper analyses the situation facing government using a game-theoretic epidemiological model. Methodology: We classify individuals into health-centered individuals and freedom-centered individuals to capture the heterogeneous preferences of citizens. We first use the extended Susceptible-Exposed-Asymptomatic-Infectious-Recovered (SEAIR) model (adding individual preferences) and the signaling game model (adding government) to analyze the strategic situation against the backdrop of a realistic model of COVID-19 infection. Findings: We find the following: 1. There exists two pooling equilibria. When health-centered and freedom-centered individuals send anti-epidemic signals, the government will adopt strict restrictive policies under budget surplus or balance. When health-centered and freedom-centered individuals send freedom signals, the government chooses not to implement restrictive policies. 2. When governments choose not to impose restrictions, the extinction of an epidemic depends on whether it has a high infection transmission rate; when the government chooses to implement non-pharmacological interventions (NPIs), whether an epidemic will disappear depends on how strict the government's restrictions are. Originality/value: Based on the existing literature, we add individual preferences and put the government into the game as a player. Our research extends the current form of combining epidemiology and game theory. By using both we get a more realistic understanding of the spread of the virus and combine that with a richer understanding of the strategic social dynamics enabled by game theoretic analysis. Our findings have important implications for public management and government decision-making in the context of COVID-19 and for potential future public health emergencies.

12.
J Virol ; 97(6): e0068923, 2023 Jun 29.
Article in English | MEDLINE | ID: covidwho-20245290

ABSTRACT

Goblet cells and their secreted mucus are important elements of the intestinal mucosal barrier, which allows host cells to resist invasion by intestinal pathogens. Porcine deltacoronavirus (PDCoV) is an emerging swine enteric virus that causes severe diarrhea in pigs and causes large economic losses to pork producers worldwide. To date, the molecular mechanisms by which PDCoV regulates the function and differentiation of goblet cells and disrupts the intestinal mucosal barrier remain to be determined. Here, we report that in newborn piglets, PDCoV infection disrupts the intestinal barrier: specifically, there is intestinal villus atrophy, crypt depth increases, and tight junctions are disrupted. There is also a significant reduction in the number of goblet cells and the expression of MUC-2. In vitro, using intestinal monolayer organoids, we found that PDCoV infection activates the Notch signaling pathway, resulting in upregulated expression of HES-1 and downregulated expression of ATOH-1 and thereby inhibiting the differentiation of intestinal stem cells into goblet cells. Our study shows that PDCoV infection activates the Notch signaling pathway to inhibit the differentiation of goblet cells and their mucus secretion, resulting in disruption of the intestinal mucosal barrier. IMPORTANCE The intestinal mucosal barrier, mainly secreted by the intestinal goblet cells, is a crucial first line of defense against pathogenic microorganisms. PDCoV regulates the function and differentiation of goblet cells, thereby disrupting the mucosal barrier; however, the mechanism by which PDCoV disrupts the barrier is not known. Here, we report that in vivo, PDCoV infection decreases villus length, increases crypt depth, and disrupts tight junctions. Moreover, PDCoV activates the Notch signaling pathway, inhibiting goblet cell differentiation and mucus secretion in vivo and in vitro. Thus, our results provide a novel insight into the mechanism underlying intestinal mucosal barrier dysfunction caused by coronavirus infection.


Subject(s)
Coronavirus Infections , Goblet Cells , Receptors, Notch , Swine Diseases , Animals , Coronavirus , Coronavirus Infections/pathology , Coronavirus Infections/veterinary , Goblet Cells/cytology , Signal Transduction , Swine , Swine Diseases/pathology , Swine Diseases/virology , Stem Cells/cytology , Cell Differentiation , Receptors, Notch/metabolism
13.
Front Cell Infect Microbiol ; 12: 988604, 2022.
Article in English | MEDLINE | ID: covidwho-20243442

ABSTRACT

The coronavirus disease 2019 (COVID-19) pandemic caused by severe acute respiratory syndrome coronavirus (SARS-CoV)-2 has been prominent around the world since it was first discovered, affecting more than 100 million people. Although the symptoms of most infected patients are not serious, there is still a considerable proportion of patients who need hospitalization and even develop fatal symptoms such as cytokine storms, acute respiratory distress syndrome and so on. Cytokine storm is usually described as a collection of clinical manifestations caused by overactivation of the immune system, which plays an important role in tissue injury and multiorgan failure. The immune system of healthy individuals is composed of two interrelated parts, the innate immune system and the adaptive immune system. Innate immunity is the body's first line of defense against viruses; it can quickly perceive viruses through pattern recognition receptors and activate related inflammatory pathways to clear pathogens. The adaptive immune system is activated by specific antigens and is mainly composed of CD4+ T cells, CD8+ T cells and B cells, which play different roles in viral infection. Here, we discuss the immune response after SARS-CoV-2 infection. In-depth study of the recognition of and response of innate immunity and adaptive immunity to SARS-CoV-2 will help to prevent the development of critical cases and aid the exploration of more targeted treatments.


Subject(s)
COVID-19 , SARS-CoV-2 , Humans , Immunity, Innate , CD4-Positive T-Lymphocytes , CD8-Positive T-Lymphocytes
14.
Proteomics ; : e2200407, 2023 Jun 03.
Article in English | MEDLINE | ID: covidwho-20241795

ABSTRACT

Multiomics approaches to studying systems biology are very powerful techniques that can elucidate changes in the genomic, transcriptomic, proteomic, and metabolomic levels within a cell type in response to an infection. These approaches are valuable for understanding the mechanisms behind disease pathogenesis and how the immune system responds to being challenged. With the emergence of the COVID-19 pandemic, the importance and utility of these tools have become evident in garnering a better understanding of the systems biology within the innate and adaptive immune response and for developing treatments and preventative measures for new and emerging pathogens that pose a threat to human health. In this review, we focus on state-of-the-art omics technologies within the scope of innate immunity.

15.
J Med Virol ; 95(6): e28845, 2023 06.
Article in English | MEDLINE | ID: covidwho-20241588

ABSTRACT

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the etiological pathogen of coronavirus disease 2019 (COVID-19), a highly contagious disease, spreading quickly and threatening global public health. The symptoms of COVID-19 vary from mild reactions to severe respiratory distress or even fatal outcomes probably due to the different status of host immunity against the virus. Here in the study, we unveiled plasma proteomic signatures and transcriptional patterns of peripheral blood mononuclear cells (PBMCs) using blood samples of 10 COVID-19 patients with different severity. Through systemic analysis, α-defensin-1 (DEFA1) was identified to be elevated in both plasma and PBMCs, and correlated with disease severity and stages. In vitro study demonstrated that DEFA1 was secreted from immunocytes and suppressed SARS-CoV-2 infection of both original and mutated strains with dose dependency. By using sequencing data, we discovered that DEFA1 was activated in monocytes through NF-κB signaling pathway after infection, and secreted into circulation to perturb SARS-CoV-2 infection by interfering protein kinase C expression. It worked mainly during virus replication instead of entry in host cells. Together, the anti-SARS-CoV-2 mechanism of DEFA1 has unveiled a corner of how innate immunity is against SARS-CoV-2 and explored its clinical potential in disease prognosis and therapeutic intervention.


Subject(s)
COVID-19 , alpha-Defensins , Humans , SARS-CoV-2 , alpha-Defensins/genetics , Monocytes , Leukocytes, Mononuclear , Multiomics , Proteomics
16.
Int J Mol Sci ; 24(10)2023 May 11.
Article in English | MEDLINE | ID: covidwho-20237555

ABSTRACT

Progressive multifocal leukoencephalopathy (PML) is a rare demyelinating disease caused by infection with JC Polyomavirus (JCPyV). Despite the identification of the disease and isolation of the causative pathogen over fifty years ago, no antiviral treatments or prophylactic vaccines exist. Disease onset is usually associated with immunosuppression, and current treatment guidelines are limited to restoring immune function. This review summarizes the drugs and small molecules that have been shown to inhibit JCPyV infection and spread. Paying attention to historical developments in the field, we discuss key steps of the virus lifecycle and antivirals known to inhibit each event. We review current obstacles in PML drug discovery, including the difficulties associated with compound penetrance into the central nervous system. We also summarize recent findings in our laboratory regarding the potent anti-JCPyV activity of a novel compound that antagonizes the virus-induced signaling events necessary to establish a productive infection. Understanding the current panel of antiviral compounds will help center the field for future drug discovery efforts.


Subject(s)
JC Virus , Leukoencephalopathy, Progressive Multifocal , Polyomavirus Infections , Humans , Leukoencephalopathy, Progressive Multifocal/drug therapy , JC Virus/physiology , Signal Transduction
17.
Front Immunol ; 14: 1196031, 2023.
Article in English | MEDLINE | ID: covidwho-20236991

ABSTRACT

Swine acute diarrhoea syndrome coronavirus (SADS-CoV), which is a recently discovered enteric coronavirus, is the major aetiological agent that causes severe clinical diarrhoea and intestinal pathological damage in pigs, and it has caused significant economic losses to the swine industry. Nonstructural protein 5, also called 3C-like protease, cleaves viral polypeptides and host immune-related molecules to facilitate viral replication and immune evasion. Here, we demonstrated that SADS-CoV nsp5 significantly inhibits the Sendai virus (SEV)-induced production of IFN-ß and inflammatory cytokines. SADS-CoV nsp5 targets and cleaves mRNA-decapping enzyme 1a (DCP1A) via its protease activity to inhibit the IRF3 and NF-κB signaling pathways in order to decrease IFN-ß and inflammatory cytokine production. We found that the histidine 41 and cystine 144 residues of SADS-CoV nsp5 are critical for its cleavage activity. Additionally, a form of DCP1A with a mutation in the glutamine 343 residue is resistant to nsp5-mediated cleavage and has a stronger ability to inhibit SADS-CoV infection than wild-type DCP1A. In conclusion, our findings reveal that SADS-CoV nsp5 is an important interferon antagonist and enhance the understanding of immune evasion by alpha coronaviruses.


Subject(s)
Alphacoronavirus , Coronavirus , Interferon Type I , Animals , Swine , Alphacoronavirus/genetics , Alphacoronavirus/metabolism , Coronavirus/metabolism , Endopeptidases , Interferon Type I/metabolism
18.
Biosensors (Basel) ; 13(5)2023 May 11.
Article in English | MEDLINE | ID: covidwho-20231120

ABSTRACT

Increased frequency of CD4+CD25+ regulatory T-cells (Treg) has been associated with disease progression in chronic lymphocytic leukemia (CLL). Flow cytometric methods, which allow for the simultaneous analysis of their specific transcription factor Foxp3 and activated STAT proteins, together with proliferation can help to elucidate the signaling mechanisms driving Treg expansion and suppression of FOXP3- conventional CD4+T-cells (Tcon). Herein, we first report a novel approach in which STAT5 phosphorylation (pSTAT5) and proliferation (BrdU-FITC incorporation) could be analyzed specifically in FOXP3+ and FOXP3- responding cells after CD3/CD28 stimulation. The addition of magnetically purified CD4+CD25+ T-cells from healthy donors to cocultured autologous CD4+CD25- T-cells resulted in suppression of Tcon cell cycle progression accompanied by a decrease in pSTAT5. Next, a method using imaging flow cytometry is presented for the detection of cytokine-dependent pSTAT5 nuclear translocation in FOXP3-expressing cells. Finally, we discuss our experimental data obtained by combining Treg pSTAT5 analysis and antigen-specific stimulation with SARS-CoV-2 antigens. Applying these methods on samples from patients revealed Treg responses to antigen-specific stimulation and significantly higher basal pSTAT5 in CLL patients treated with immunochemotherapy. Thus, we speculate that through the use of this pharmacodynamic tool, the efficacy of immunosuppressive drugs and their possible off-target effects can be assessed.


Subject(s)
COVID-19 , Leukemia, Lymphocytic, Chronic, B-Cell , Humans , T-Lymphocytes, Regulatory/metabolism , Leukemia, Lymphocytic, Chronic, B-Cell/metabolism , Flow Cytometry , SARS-CoV-2/metabolism , STAT5 Transcription Factor/metabolism , STAT5 Transcription Factor/pharmacology , Forkhead Transcription Factors/metabolism , Forkhead Transcription Factors/pharmacology
19.
Hong Kong Journal of Dermatology and Venereology ; 28(4):170-173, 2020.
Article in English | EMBASE | ID: covidwho-2324597
20.
Chinese Pharmacological Bulletin ; 36(9):1309-1316, 2020.
Article in Chinese | EMBASE | ID: covidwho-2323869

ABSTRACT

Aim To explore the active compound of Maxingganshi decoction in treatment of novel coronavirus pneumonia(COVID-19). Methods With the help of TCMSP database, the chemical components and action targets of ephedra, almond, licorice, and gypsum in Maxingganshi decoction were searched, and then a C-T network, protein interaction analysis, GO functional enrichment analysis, and KEGG pathway enrichment were constructed. Analysis was performed to predict its mechanism of action. Results A total of 120 compounds in Maxingganshi decoction corresponded to 222 targets. PTGS2, ESR1, PPARG, AR, NOS2, NCOA2 acted on PI3K-Akt signaling pathway, TNF signaling pathway, IL-17 signaling pathway, T cell receptor signaling pathways, etc. The results of molecular docking showed that the affinity of quercetin, kaempferol, glabridin and other core compounds was similar to recommended drugs in treatment of COVID-19. Conclusions The active compounds of Maxingganshi decoction can target multiple pathways to achieve the therapeutic effect of COVID-19.Copyright © 2020 Publication Centre of Anhui Medical University. All rights reserved.

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