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Yenurkar D, Ruocco M, Pragya P, Liang L, Mukherjee S. Small molecule conjugation reduces macrophage uptake and increases in vivo blood circulation of polystyrene nanoparticles. Biomed Mater 2024. [PMID: 38215477 DOI: 10.1088/1748-605x/ad1df8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2024]
Abstract
Nanomedicine often failed clinically to show therapeutic efficacy due to reduced particle circulation and enhanced capture by the reticuloendothelial system (RES), including the liver. Developing novel immunomodulatory surface coating can prevent macrophage capture and increase the particle circulation of the nanomedicine, resulting in higher therapeutic efficiency. Herein, we demonstrate the development of immunomodulatory small molecule (RZA15) with triazole functionality using copper-catalyzed click chemistry to conjugate onto spherical polystyrene nanoparticles using amide coupling reactions, achieving higher blood circulation and lesser macrophage uptake of the nanoconjugates. In this work, we evaluated the effectiveness of RZA15 coating for the enhanced circulation of polystyrene nanoparticles of 100 nm size, which is commonly utilized for various drug delivery applications, and compared with poly(ethylene)glycol (PEG) coatings. Several polystyrene nanoconjugate formulations were analyzed in vitro in normal and macrophage cells for cell viability and cellular uptake studies. In vitro studies demonstrated lesser macrophage uptake of the nanoconjugates following RZA15 coating. Finally, in vivo, blood-circulation, pharmacokinetics, and biodistribution studies were performed in the C57BL/6J mouse model that endorsed the substantial role of RZA15 in preventing liver and spleen capture and results in extended circulation. Coating immunomodulatory small molecules to nanoparticles can severely enhance the potential therapeutic effects of nanomedicine at lower doses.
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Affiliation(s)
- Devyani Yenurkar
- Biomedical Engineering, Indian Institute of Technology BHU Varanasi, School of Biomedical Engineering, Indian Institute of Technology (BHU), Varanasi 221005, UP, India, Varanasi, 221005, INDIA
| | - Maria Ruocco
- Department of Bioengineering, Rice University, Department of Bioengineering, Rice University, Houston, TX 77030, USA, Houston, 77005-1892, UNITED STATES
| | - Pragya Pragya
- Indian Institute of Technology BHU Varanasi, School of Biomedical Engineering, Indian Institute of Technology (BHU), Varanasi 221005, UP, India, Varanasi, Uttar Pradesh, 221005, INDIA
| | - Lily Liang
- Johns Hopkins University, Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA, Baltimore, Maryland, 21218-2625, UNITED STATES
| | - Sudip Mukherjee
- Department of Biomedical Engineering, Indian Institute of Technology BHU Varanasi, School of Biomedical Engineering, Indian Institute of Technology (BHU), Varanasi 221005, UP, India, Varanasi, Uttar Pradesh, 221005, INDIA
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Guzzardella A, Motos A, Vallverdú J, Torres A. Corticosteroids in sepsis and community-acquired pneumonia. Med Klin Intensivmed Notfmed 2023; 118:86-92. [PMID: 38051381 DOI: 10.1007/s00063-023-01093-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 10/24/2023] [Indexed: 12/07/2023]
Abstract
Sepsis and septic shock, which are often caused by pneumonia, impact millions of people every year. Despite adequate antibiotic therapy, mortality remains high, up to 45% in septic shock, which is characterized by an inappropriate, excessive immune response of the host. Moreover, critical illness-related corticosteroid insufficiency often coexists. Against this background, several trials and meta-analyses evaluated corticosteroid therapy as adjuvant therapy with heterogeneous results. Indeed, before 2000, high-dosage, short courses of corticosteroid treatment resulted in no benefit on mortality and a higher rate of adverse events. After 2000, thanks to a deeper understanding of the pathophysiology, low-dosage with longer courses of treatment were tested. With this regimen, a faster decrease in inflammation and faster resolution of shock, with a low rate of mild adverse events, was demonstrated although no clear effect on mortality was shown. To date, guidelines on sepsis and septic shock and guidelines on severe community-acquired pneumonia suggest corticosteroid use in selected patients. Furthermore, by utilizing latent class analysis, phenotypes of sepsis patients who benefit the most from corticosteroid treatment were recently identified. Future research should be guided by a precision medicine approach to identify adequate dosage and duration of corticosteroid treatment for appropriate patients. This article is freely available.
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Affiliation(s)
- Amedeo Guzzardella
- Department of Pneumology, Hospital Clinic of Barcelona, August Pi i Sunyer Biomedical Research Institute-IDIBAPS, Barcelona, Spain
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Ana Motos
- CIBER de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Jordi Vallverdú
- Department of Anesthesiology and Reanimation, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Antoni Torres
- Department of Pneumology, Hospital Clinic of Barcelona, August Pi i Sunyer Biomedical Research Institute-IDIBAPS, Barcelona, Spain.
- CIBER de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain.
- Department of Pulmonary Medicine, Hospital Clinic of Barcelona, C/Villarroel 170, 08036, Barcelona, Spain.
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3
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Appelman B, Michels EHA, de Brabander J, Peters-Sengers H, van Amstel RBE, Noordzij SM, Klarenbeek AM, van Linge CCA, Chouchane O, Schuurman AR, Reijnders TDY, Douma RA, Bos LDJ, Wiersinga WJ, van der Poll T. Thrombocytopenia is associated with a dysregulated host response in severe COVID-19. Thromb Res 2023; 229:187-197. [PMID: 37541167 DOI: 10.1016/j.thromres.2023.07.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 06/23/2023] [Accepted: 07/17/2023] [Indexed: 08/06/2023]
Abstract
BACKGROUND Thrombocytopenia is associated with increased mortality in COVID-19 patients. OBJECTIVE To determine the association between thrombocytopenia and alterations in host response pathways implicated in disease pathogenesis in patients with severe COVID-19. PATIENTS/METHODS We studied COVID-19 patients admitted to a general hospital ward included in a national (CovidPredict) cohort derived from 13 hospitals in the Netherlands. In a subgroup, 43 host response biomarkers providing insight in aberrations in distinct pathophysiological domains (coagulation and endothelial cell function; inflammation and damage; cytokines and chemokines) were determined in plasma obtained at a single time point within 48 h after admission. Patients were stratified in those with normal platelet counts (150-400 × 109/L) and those with thrombocytopenia (<150 × 109/L). RESULTS 6.864 patients were enrolled in the national cohort, of whom 1.348 had thrombocytopenia and 5.516 had normal platelets counts; the biomarker cohort consisted of 429 patients, of whom 85 with thrombocytopenia and 344 with normal platelet counts. Plasma D-dimer levels were not different in thrombocytopenia, although patients with moderate-severe thrombocytopenia (<100 × 109/L) showed higher D-dimer levels, indicating enhanced coagulation activation. Patients with thrombocytopenia had lower plasma levels of many proinflammatory cytokines and chemokines, and antiviral mediators, suggesting involvement of platelets in inflammation and antiviral immunity. Thrombocytopenia was associated with alterations in endothelial cell biomarkers indicative of enhanced activation and a relatively preserved glycocalyx integrity. CONCLUSION Thrombocytopenia in hospitalized patients with severe COVID-19 is associated with broad host response changes across several pathophysiological domains. These results suggest a role of platelets in the immune response during severe COVID-19.
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Affiliation(s)
- Brent Appelman
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands.
| | - Erik H A Michels
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Justin de Brabander
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Hessel Peters-Sengers
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands; Amsterdam UMC location Vrije Universiteit Amsterdam, Department of Epidemiology and Data Science, Boelelaan 1117, Amsterdam, the Netherlands
| | - Rombout B E van Amstel
- Amsterdam UMC location University of Amsterdam, Department of Intensive Care Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Sophie M Noordzij
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Augustijn M Klarenbeek
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Christine C A van Linge
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Osoul Chouchane
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Alex R Schuurman
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Tom D Y Reijnders
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Renée A Douma
- Flevo Hospital, Department of Internal Medicine, Almere, the Netherlands
| | - Lieuwe D J Bos
- Amsterdam UMC location University of Amsterdam, Department of Intensive Care Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - W Joost Wiersinga
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands; Amsterdam UMC location University of Amsterdam, Division of Infectious Diseases, Department of Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Tom van der Poll
- Amsterdam UMC location University of Amsterdam, Center for Experimental and Molecular Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands; Amsterdam UMC location University of Amsterdam, Division of Infectious Diseases, Department of Medicine, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
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Shuaib M, Adroub S, Mourier T, Mfarrej S, Zhang H, Esau L, Alsomali A, Alofi FS, Ahmad AN, Shamsan A, Khogeer A, Hashem AM, Almontashiri NAM, Hala S, Pain A. Impact of the SARS-CoV-2 nucleocapsid 203K/204R mutations on the inflammatory immune response in COVID-19 severity. Genome Med 2023; 15:54. [PMID: 37475040 PMCID: PMC10360309 DOI: 10.1186/s13073-023-01208-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 07/04/2023] [Indexed: 07/22/2023] Open
Abstract
BACKGROUND The excessive inflammatory responses provoked by SARS-CoV-2 infection are critical factors affecting the severity and mortality of COVID-19. Previous work found that two adjacent co-occurring mutations R203K and G204R (KR) on the nucleocapsid (N) protein correlate with increased disease severity in COVID-19 patients. However, links with the host immune response remain unclear. METHODS Here, we grouped nasopharyngeal swab samples of COVID-19 patients into two cohorts based on the presence and absence of SARS-CoV-2 nucleocapsid KR mutations. We performed nasopharyngeal transcriptome analysis of age, gender, and ethnicity-matched COVID-19 patients infected with either SARS-CoV-2 with KR mutations in the N protein (KR patients n = 39) or with the wild-type N protein (RG patients n = 39) and compared to healthy controls (n = 34). The impact of KR mutation on immune response was further characterized experimentally by transcriptomic and proteomic profiling of virus-like-particle (VLP) incubated cells. RESULTS We observed markedly elevated expression of proinflammatory cytokines, chemokines, and interferon-stimulated (ISGs) genes in the KR patients compared to RG patients. Using nasopharyngeal transcriptome data, we found significantly higher levels of neutrophils and neutrophil-to-lymphocyte (NLR) ratio in KR patients than in the RG patients. Furthermore, transcriptomic and proteomic profiling of VLP incubated cells confirmed a similar hyper-inflammatory response mediated by the KR variant. CONCLUSIONS Our data demonstrate an unforeseen connection between nucleocapsid KR mutations and augmented inflammatory immune response in severe COVID-19 patients. These findings provide insights into how mutations in SARS-CoV-2 modulate host immune output and pathogenesis and may contribute to more efficient therapeutics and vaccine development.
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Affiliation(s)
- Muhammad Shuaib
- Pathogen Genomics Laboratory, Bioscience Program, Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
| | - Sabir Adroub
- Pathogen Genomics Laboratory, Bioscience Program, Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Tobias Mourier
- Pathogen Genomics Laboratory, Bioscience Program, Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Sara Mfarrej
- Pathogen Genomics Laboratory, Bioscience Program, Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Huoming Zhang
- Bioscience Core Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Luke Esau
- Bioscience Core Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Afrah Alsomali
- Infectious Diseases Department, King Abdullah Medical Complex, Jeddah, MOH, Saudi Arabia
| | - Fadwa S Alofi
- Infectious Diseases Department, King Fahad Hospital, Madinah, MOH, Saudi Arabia
| | - Adeel Nazir Ahmad
- KAUST Health - Fakeeh Care, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Abbas Shamsan
- Dr. Suliman Al-Habib Medical Group, Riyadh, Saudi Arabia
| | - Asim Khogeer
- Plan and Research Department, General Directorate of Health Affairs Makkah Region, Makkah, MOH, Saudi Arabia
| | - Anwar M Hashem
- Vaccines and Immunotherapy Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Clinical Microbiology and Immunology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Naif A M Almontashiri
- College of Applied Medical Sciences, Taibah University, Madinah, Saudi Arabia
- Center for Genetics and Inherited Diseases, Taibah University, Almadinah Almunwarah, Saudi Arabia
| | - Sharif Hala
- Pathogen Genomics Laboratory, Bioscience Program, Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
- Infectious Disease Research Department, King Abdullah International Medical Research Centre, Ministry of National Guard Health Affairs, Jeddah, Saudi Arabia
- King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Jeddah, Saudi Arabia
| | - Arnab Pain
- Pathogen Genomics Laboratory, Bioscience Program, Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
- International Institute for Zoonosis Control, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Sapporo, 001-0020, Japan.
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Gjorgjieva T, Chaloemtoem A, Shahin T, Bayaraa O, Dieng MM, Alshaikh M, Abdalbaqi M, Del Monte J, Begum G, Leonor C, Manikandan V, Drou N, Arshad M, Arnoux M, Kumar N, Jabari A, Abdulle A, ElGhazali G, Ali R, Shaheen SY, Abdalla J, Piano F, Gunsalus KC, Daggag H, Al Nahdi H, Abuzeid H, Idaghdour Y. Systems genetics identifies miRNA-mediated regulation of host response in COVID-19. Hum Genomics 2023; 17:49. [PMID: 37303042 DOI: 10.1186/s40246-023-00494-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/10/2023] [Indexed: 06/13/2023] Open
Abstract
BACKGROUND Individuals infected with SARS-CoV-2 vary greatly in their disease severity, ranging from asymptomatic infection to severe disease. The regulation of gene expression is an important mechanism in the host immune response and can modulate the outcome of the disease. miRNAs play important roles in post-transcriptional regulation with consequences on downstream molecular and cellular host immune response processes. The nature and magnitude of miRNA perturbations associated with blood phenotypes and intensive care unit (ICU) admission in COVID-19 are poorly understood. RESULTS We combined multi-omics profiling-genotyping, miRNA and RNA expression, measured at the time of hospital admission soon after the onset of COVID-19 symptoms-with phenotypes from electronic health records to understand how miRNA expression contributes to variation in disease severity in a diverse cohort of 259 unvaccinated patients in Abu Dhabi, United Arab Emirates. We analyzed 62 clinical variables and expression levels of 632 miRNAs measured at admission and identified 97 miRNAs associated with 8 blood phenotypes significantly associated with later ICU admission. Integrative miRNA-mRNA cross-correlation analysis identified multiple miRNA-mRNA-blood endophenotype associations and revealed the effect of miR-143-3p on neutrophil count mediated by the expression of its target gene BCL2. We report 168 significant cis-miRNA expression quantitative trait loci, 57 of which implicate miRNAs associated with either ICU admission or a blood endophenotype. CONCLUSIONS This systems genetics study has given rise to a genomic picture of the architecture of whole blood miRNAs in unvaccinated COVID-19 patients and pinpoints post-transcriptional regulation as a potential mechanism that impacts blood traits underlying COVID-19 severity. The results also highlight the impact of host genetic regulatory control of miRNA expression in early stages of COVID-19 disease.
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Affiliation(s)
- T Gjorgjieva
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
| | - A Chaloemtoem
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - T Shahin
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - O Bayaraa
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - M M Dieng
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - M Alshaikh
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - M Abdalbaqi
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - J Del Monte
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - G Begum
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - C Leonor
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - V Manikandan
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - N Drou
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - M Arshad
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - M Arnoux
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - N Kumar
- Seha (Abu Dhabi Health Services Company), Abu Dhabi, United Arab Emirates
| | - A Jabari
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - A Abdulle
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - G ElGhazali
- Sheikh Khalifa Medical City-Union 71 PureHealth, Abu Dhabi, United Arab Emirates
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - R Ali
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - S Y Shaheen
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - J Abdalla
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - F Piano
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - K C Gunsalus
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - H Daggag
- Seha (Abu Dhabi Health Services Company), Abu Dhabi, United Arab Emirates
| | - H Al Nahdi
- Seha (Abu Dhabi Health Services Company), Abu Dhabi, United Arab Emirates
| | - H Abuzeid
- Seha (Abu Dhabi Health Services Company), Abu Dhabi, United Arab Emirates
| | - Y Idaghdour
- Biology Program, Division of Science, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
- Center for Genomics and Systems Biology, NYU Abu Dhabi, Abu Dhabi, United Arab Emirates.
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Ezema CA, Okagu IU, Ezeorba TPC. Escaping the enemy's bullets: an update on how malaria parasites evade host immune response. Parasitol Res 2023:10.1007/s00436-023-07868-6. [PMID: 37219610 DOI: 10.1007/s00436-023-07868-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Accepted: 05/08/2023] [Indexed: 05/24/2023]
Abstract
Malaria continues to cause untold hardship to inhabitants of malaria-endemic regions, causing significant morbidity and mortality that severely impact global health and the economy. Considering the complex life cycle of malaria parasites (MPs) and malaria biology, continued research efforts are ongoing to improve our understanding of the pathogenesis of the diseases. Female Anopheles mosquito injects MPs into its hosts during a blood meal, and MPs invade the host skin and the hepatocytes without causing any serious symptoms. Symptomatic infections occur only during the erythrocytic stage. In most cases, the host's innate immunity (for malaria-naïve individuals) and adaptive immunity (for pre-exposed individuals) mount severe attacks and destroy most MPs. It is increasingly understood that MPs have developed several mechanisms to escape from the host's immune destruction. This review presents recent knowledge on how the host's immune system destroys invading MPs as well as MPs survival or host immune evasion mechanisms. On the invasion of host cells, MPs release molecules that bind to cell surface receptors to reprogram the host in a way to lose the capacity to destroy them. MPs also hide from the host immune cells by inducing the clustering of both infected and uninfected erythrocytes (rosettes), as well as inducing endothelial activation. We hope this review will inspire more research to provide a complete understanding of malaria biology and promote interventions to eradicate the notorious disease.
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Affiliation(s)
- Chinonso Anthony Ezema
- Department of Microbiology, Faculty of Biological Sciences, University of Nigeria, Enugu State, 410001, Nigeria
- Division of Soft Matter, Hokkaido University, Sapporo, 060-0810, Japan
| | - Innocent Uzochukwu Okagu
- Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria, Enugu State, 410001, Nigeria
| | - Timothy Prince Chidike Ezeorba
- Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria, Enugu State, 410001, Nigeria.
- Department of Genetics and Biotechnology, Faculty of Biological Sciences, University of Nigeria, Enugu State, 410001, Nigeria.
- Department of Molecular Biotechnology, School of Biosciences, University of Birmingham Edgbaston, Birmingham, B15 2TT, UK.
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Chokkalla AK, Tam E, Liang R, Cruz AT, Devaraj S. Validation of a Multi-Analyte Immunoassay for Distinguishing Bacterial vs. Viral Infections in a Pediatric Cohort. Clin Chim Acta 2023; 546:117387. [PMID: 37201742 DOI: 10.1016/j.cca.2023.117387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 04/10/2023] [Accepted: 05/03/2023] [Indexed: 05/20/2023]
Abstract
BACKGROUND Clinical presentation of viral and bacterial infections or co-infections overlaps significantly. Pathogen identification is the gold standard for appropriate treatment. Recently, FDA cleared a multivariate index test called MeMed-BV that distinguishes viral and bacterial infections based on the differential expression of 3 host proteins. Here, we sought to validate MeMed-BV immunoassay on MedKey analyzer in our pediatric hospital following guidelines from the Clinical and Laboratory Standards Institute. METHODS The analytical performance of the MeMed-BV test was evaluated with precision (intra- and inter-assay), method comparison and interference studies. The clinical performance (diagnostic sensitivity and specificity) of the MeMed-BV test was assessed by conducting a retrospective cohort study (n=60) using plasma samples from pediatric patients with acute febrile illness who visited the emergency department of our hospital. RESULTS MeMed-BV showed acceptable intra- and inter-assay precision with a range of <3 score units in both the high-score bacterial as well as the low-score viral controls. Diagnostic accuracy studies revealed a sensitivity of 94% and specificity of 88% for identifying bacterial infections or co-infections. Our MeMed-BV results showed an excellent agreement (R=0.998) with manufacturer's laboratory data and compared well with ELISA studies. Gross hemolysis and icterus did not affect the assay, but gross lipemia showed a considerable bias in samples with moderate likelihood of viral infection. Importantly, the MeMed-BV test performed better than routinely measured infection-related biomarkers like white blood cell counts, procalcitonin and C-reactive protein in classifying bacterial infections. CONCLUSION MeMed-BV immunoassay demonstrated acceptable analytical performance and is reliable for distinguishing viral and bacterial infections or co-infections in pediatric patients. Future studies are warranted to examine the clinical utility, especially with respect to reducing the need for blood cultures and time to treatment for the patient.
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Affiliation(s)
- Anil K Chokkalla
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, USA; Department of Pathology, Texas Children's Hospital, Houston, TX, USA
| | - Estella Tam
- Department of Pathology, Texas Children's Hospital, Houston, TX, USA
| | - Rommel Liang
- Department of Pathology, Texas Children's Hospital, Houston, TX, USA
| | - Andrea T Cruz
- Divisions of Emergency Medicine and Infectious Diseases, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Sridevi Devaraj
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, USA; Department of Pathology, Texas Children's Hospital, Houston, TX, USA.
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8
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Li J, Wang L, Zhang X, Wen X, Wei X, Qin Q, Wang S. Grouper annexin A2 affects RGNNV by regulating the host immune response. Fish Shellfish Immunol 2023; 137:108771. [PMID: 37100308 DOI: 10.1016/j.fsi.2023.108771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 04/07/2023] [Accepted: 04/24/2023] [Indexed: 05/07/2023]
Abstract
Annexin A2 (AnxA2) is ubiquitous in vertebrates and has been identified as a multifunctional protein participating in a series of biological processes, such as endocytosis, exocytosis, signal transduction, transcription regulation, and immune responses. However, the function of AnxA2 in fish during virus infection still remains unknown. In this study, we identified and characterized AnxA2 (EcAnxA2) in Epinephelus coioides. EcAnxA2 encoded a 338 amino acids protein with four identical annexin superfamily conserved domains, which shared high identity with other AnxA2 of different species. EcAnxA2 was widely expressed in different tissues of healthy groupers, and its expression was significantly increased in grouper spleen cells infected with red-spotted grouper nervous necrosis virus (RGNNV). Subcellular locatio n analyses showed that EcAnxA2 diffusely distributed in the cytoplasm. After RGNNV infection, the spatial distribution of EcAnxA2 was unaltered, and a few EcAnxA2 co-localized with RGNNV during the late stage of infection. Furthermore, overexpression of EcAnxA2 significantly increased RGNNV infection, and knockdown of EcAnxA2 reduced RGNNV infection. In addition, overexpressed EcAnxA2 reduced the transcription of interferon (IFN)-related and inflammatory factors, including IFN regulatory factor 7 (IRF7), IFN stimulating gene 15 (ISG15), melanoma differentiation related gene 5 (MDA5), MAX interactor 1 (Mxi1) laboratory of genetics and physiology 2 (LGP2), IFN induced 35 kDa protein (IFP35), tumor necrosis factor receptor-associated factor 6 (TRAF6) and interleukin 6 (IL-6). The transcription of these genes was up-regulated when EcAnxA2 was inhibited by siRNA. Taken together, our results showed that EcAnxA2 affected RGNNV infection by down-regulating the host immune response in groupers, which provided new insights into the roles of AnxA2 in fish during virus infection.
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Affiliation(s)
- Junrong Li
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Liqun Wang
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Xinyue Zhang
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Xiaozhi Wen
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Xinyan Wei
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Qiwei Qin
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266000, China.
| | - Shaowen Wang
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China.
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Alam K, Sharma G, Forrester JV, Basu S. Antigen-Specific Intraocular Cytokine Responses Distinguish Ocular Tuberculosis From Undifferentiated Uveitis in Tuberculosis-Immunoreactive Patients. Am J Ophthalmol 2023; 246:31-41. [PMID: 36087765 DOI: 10.1016/j.ajo.2022.08.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 08/28/2022] [Accepted: 08/30/2022] [Indexed: 01/24/2023]
Abstract
PURPOSE To compare antigen-specific intraocular immune responses between different clinical phenotypes of tuberculin skin test (TST)-positive and TST-negative uveitis. DESIGN Single center, retrospective cross-sectional study. METHODS Patients requiring diagnostic or therapeutic vitrectomy for the management of intraocular inflammation were divided into 3 groups based on Standardization of Uveitis Nomenclature (SUN) classification criteria for tubercular uveitis. Group 1 included patients with ocular tuberculosis (OTB; n = 23) who were TST-positive patients, met the SUN criteria, and/or had a polymerase chain reaction (PCR)-positive test for TB. Group 2 included patients with uveitis of unknown origin (UNK; n = 24) who were undifferentiated TST-positive patients who had not met SUN criteria. Group 3 included non-TB uveitis patients (n = 24) who were TST-negative either with or without a well-defined non-TB diagnosis. Total vitreous cells were activated with Mycobacterium tuberculosis-specific Early Secreted Antigenic Target-6 (ESAT-6) or the retinal autoantigen, interphotoreceptor retinoid-binding protein peptide (pIRBP 1-20), stained for intracellular interferon gamma (IFNγ), tumor necrosis factor-alfa (TNFα), and interleukin 17 (IL-17), and analyzed by flow cytometry. Antigen-specific single and dual (polyfunctional) cytokine responses to ESAT-6 and IRBP were compared between the 3 groups. RESULTS All cytokine responses to ESAT-6 were higher in the UNK group compared with the non-TB control subjects, while all except IL-17 were comparable between the OTB and non-TB groups. Polyfunctional responses-IFNγ/IL-17 (P = .002), TNFα/IL-17 (P = .02), and TNFα/IFNγ (P = .01)-were significantly greater for UNK than the OTB group. Polyfunctional cells also produced more cytokine per cell than respective monofunctional cells. IRBP cytokine responses were comparable between different groups and were not affected by the clinical phenotype or duration of disease. CONCLUSION The intraocular polyfunctional cytokine response is stronger in undifferentiated TST-positive uveitis than in OTB patients, likely representing an exaggerated anti-TB immune response rather than active infection.
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Affiliation(s)
- Kaiser Alam
- Ocular Immunology Laboratory, Prof Brien Holden Eye Research Centre, LV Prasad Eye Institute, Kallam Anji Reddy Campus, Hyderabad, India
| | - Gunjan Sharma
- Ocular Immunology Laboratory, Prof Brien Holden Eye Research Centre, LV Prasad Eye Institute, Kallam Anji Reddy Campus, Hyderabad, India; Multi-disciplinary Research Unit, Nizam's Institute of Medical Sciences, Hyderabad, India
| | - John V Forrester
- Ocular Immunology Group, Section of Infection and Immunity, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Soumyava Basu
- Ocular Immunology Laboratory, Prof Brien Holden Eye Research Centre, LV Prasad Eye Institute, Kallam Anji Reddy Campus, Hyderabad, India; Uveitis Service, LV Prasad Eye Institute, Kallam Anji Reddy Campus, Hyderabad, India.
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Ma Z, Li Z, Jiang R, Li X, Yan K, Zhang N, Lu B, Huang Y, Dibo N, Wu X. Virulence-related gene wx2 of Toxoplasma gondii regulated host immune response via classic pyroptosis pathway. Parasit Vectors 2022; 15:454. [PMID: 36471417 PMCID: PMC9724370 DOI: 10.1186/s13071-022-05502-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 09/16/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Toxoplasma gondii is known as the most successful parasite, which can regulate the host immune response through a variety of ways to achieve immune escape. We previously reported that a novel gene wx2 of T. gondii may be a virulence-related molecule. The objective of this study was to explore the mechanism of wx2 regulating host immune response. METHODS The wx2 knockout strain (RHwx2-/- strain) and complementary strain (RHwx2+/+ strain) were constructed by the CRISPR/Cas9 technique, and the virulence of the wx2 gene was detected and changes in pyroptosis-related molecules were observed. RESULTS Compared with the wild RH and RHwx2+/+ strain groups, the survival time for mice infected with the RHwx2-/- strain was prolonged to a certain extent. The mRNA levels of pyroptosis-related molecules of caspase-1, NLRP3, and GSDMD and et al. in mouse lymphocytes in vivo and RAW267.4 cells in vitro infected with RHwx2-/- strain increased to different degrees, compared with infected with wild RH strain and RHwx2+/+ strain. As with the mRNA level, the protein level of caspase-1, caspase-1 p20, IL-1β, NLRP3, GSDMD-FL, GSDMD-N, and phosphorylation level of NF-κB (p65) were also significantly increased. These data suggest that wx2 may regulate the host immune response through the pyroptosis pathway. In infected RAW264.7 cells at 48 h post-infection, the levels of Th1-type cytokines of IFN-γ, Th2-type cytokines such as IL-13, Th17-type cytokine of IL-17 in cells infected with RHwx2-/- were significantly higher than those of RH and RHwx2+/+ strains, suggesting that the wx2 may inhibit the host's immune response. CONCLUSION wx2 is a virulence related gene of T. gondii, and may be involved in host immune regulation by inhibiting the pyroptosis pathway.
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Affiliation(s)
- Zhenrong Ma
- grid.216417.70000 0001 0379 7164Department of Parasitology, Xiangya School of Basic Medicine, Central South University, Changsha, China
| | - Zhuolin Li
- grid.216417.70000 0001 0379 7164Department of Parasitology, Xiangya School of Basic Medicine, Central South University, Changsha, China
| | - Ruolan Jiang
- grid.216417.70000 0001 0379 7164Department of Parasitology, Xiangya School of Basic Medicine, Central South University, Changsha, China ,grid.284723.80000 0000 8877 7471School of Public Health, Southern Medical University, Guangzhou, China
| | - Xuanwu Li
- grid.216417.70000 0001 0379 7164Department of Parasitology, Xiangya School of Basic Medicine, Central South University, Changsha, China
| | - Kang Yan
- grid.216417.70000 0001 0379 7164Department of Parasitology, Xiangya School of Basic Medicine, Central South University, Changsha, China
| | - Ni Zhang
- grid.216417.70000 0001 0379 7164Department of Parasitology, Xiangya School of Basic Medicine, Central South University, Changsha, China
| | - Bin Lu
- grid.216417.70000 0001 0379 7164Department of Parasitology, Xiangya School of Basic Medicine, Central South University, Changsha, China
| | - Yehong Huang
- grid.216417.70000 0001 0379 7164Department of Parasitology, Xiangya School of Basic Medicine, Central South University, Changsha, China
| | - Nouhoum Dibo
- grid.216417.70000 0001 0379 7164Department of Parasitology, Xiangya School of Basic Medicine, Central South University, Changsha, China
| | - Xiang Wu
- grid.216417.70000 0001 0379 7164Department of Parasitology, Xiangya School of Basic Medicine, Central South University, Changsha, China ,Hunan Provincial Key Lab of Immunology and Transmission Control On Schistosomiasis, Changsha, China
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Samui P, Mondal J, Ahmad B, Chatterjee AN. Clinical effects of 2-DG drug restraining SARS-CoV-2 infection: A fractional order optimal control study. J Biol Phys 2022; 48:415-38. [PMID: 36459249 DOI: 10.1007/s10867-022-09617-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 10/28/2022] [Indexed: 12/03/2022] Open
Abstract
Fractional calculus is very convenient tool in modeling of an emergent infectious disease system comprising previous disease states, memory of disease patterns, profile of genetic variation etc. Significant complex behaviors of a disease system could be calibrated in a proficient manner through fractional order derivatives making the disease system more realistic than integer order model. In this study, a fractional order differential equation model is developed in micro level to gain perceptions regarding the effects of host immunological memory in dynamics of SARS-CoV-2 infection. Additionally, the possible optimal control of the infection with the help of an antiviral drug, viz. 2-DG, has been exemplified here. The fractional order optimal control would enable to employ the proper administration of the drug minimizing its systematic cost which will assist the health policy makers in generating better therapeutic measures against SARS-CoV-2 infection. Numerical simulations have advantages to visualize the dynamical effects of the immunological memory and optimal control inputs in the epidemic system.
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12
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Davitt E, Davitt C, Mazer MB, Areti SS, Hotchkiss RS, Remy KE. COVID-19 disease and immune dysregulation. Best Pract Res Clin Haematol 2022; 35:101401. [PMID: 36494149 PMCID: PMC9568269 DOI: 10.1016/j.beha.2022.101401] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 10/11/2022] [Indexed: 12/15/2022]
Abstract
The SARS-CoV-2 virus has complex and divergent immune alterations in differing hosts and over disease evolution. Much of the nuanced COVID-19 disease immune dysregulation was originally dominated by innate cytokine changes, which has since been replaced with a more complex picture of innate and adaptive changes characterized by simultaneous hyperinflammatory and immunosuppressive phenomena in effector cells. These intricacies are summarized in this review as well as potential relevance from acute infection to a multisystem inflammatory syndrome commonly seen in children. Additional consideration is made for the influence of variant to variant host cellular changes and the impact of potential vaccination upon these phenotypes. Finally, therapeutic benefit for immune alterations are discussed.
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Affiliation(s)
- Ethan Davitt
- School of Medicine, Washington University in St. Louis, St. Louis, MO, USA
| | - Colin Davitt
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Monty B. Mazer
- Department of Pediatrics, University Hospitals of Cleveland, Cleveland, OH, USA,School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Sathya S. Areti
- Department of Internal Medicine, University Hospitals of Cleveland, Cleveland, OH, USA
| | - Richard S. Hotchkiss
- School of Medicine, Washington University in St. Louis, St. Louis, MO, USA,Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Kenneth E. Remy
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, USA,Department of Pediatrics, University Hospitals of Cleveland, Cleveland, OH, USA,Department of Internal Medicine, University Hospitals of Cleveland, Cleveland, OH, USA,School of Medicine, Case Western Reserve University, Cleveland, OH, USA,Corresponding author.Department of Internal Medicine, Case Western Reserve University, School of Medicine, University Hospitals of Cleveland, 11100 Euclid Ave, Cleveland, OH, USA
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13
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Dilip Pandkar P, Raosaheb Deshmukh S, Sachdeva V. COVID-19 patient with B Cell Lymphoma co-morbidity managed with co-administration of Ayurvedic formulation. J Ayurveda Integr Med 2022; 13:100632. [PMID: 35975131 PMCID: PMC9372187 DOI: 10.1016/j.jaim.2022.100632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/16/2022] [Accepted: 08/01/2022] [Indexed: 11/03/2022] Open
Abstract
‘Renaissance took place in Chaos and plague’. It was COVID-19 pandemic, when world realized ayurveda co-interventions are praiseworthy even in acute, infective and fatal conditions like COVID-19. We report perhaps first case of COVID-19 patient with cancer managed with poly-herbal ayurvedic formulation and integrated approach. In the first wave of COVID-19 (June 2020), a 47 year old male with history of Chronic kidney disease and active B Cell Lymphoma complained of fever, malaise, cattarah and ageusia. He was found positive on RT-PCR which was done promptly and was later treated in home quarantine with antipyretics, Vitamin C and Madhav rasayan a polyherbal preparation containing Piper longum, Glycyrrhiza glabra, Eclipta alba, Achyranthes aspera, Embelia ribes and Aloe vera designed to modulate host response. It was challenging to treat a patient with cancer with immunocompromised status as he had recently finished his chemotherapy cycle (R–CHOP regimen). Patient well tolerated the intervention and recovered symptomatically. He did not developed any respiratory complications and oxygen saturation remained maintained. On 7th day RT-PCR was found to be negative. Plethora of literature is available on anti-viral and immunomodulatory efficacies of Ayurveda herbs based on in vitro studies. Such efficacies can be replicated at patient's level if supported with wisdom of Ayurveda epistemology. Early diagnosis on RT-PCR and early inception of ayurveda medicine and diet interventions might be crucial element for better recovery.
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Affiliation(s)
- Prasad Dilip Pandkar
- Department of Kriya sharir (Ayurveda Physiology), Bharati Vidyapeeth Deemed University, College of Ayurveda, Pune 411043
| | - Santosh Raosaheb Deshmukh
- Department of Kriya sharir (Ayurveda Physiology), Bharati Vidyapeeth Deemed University, College of Ayurveda, Pune 411043
| | - Vinay Sachdeva
- Department of Kriya sharir (Ayurveda Physiology), Bharati Vidyapeeth Deemed University, College of Ayurveda, Pune 411043
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Jin M, He J, Li J, Hu Y, Sun D, Gu H. Edwardsiella piscicida YccA: A novel virulence factor essential to membrane integrity, mobility, host infection, and host immune response. Fish Shellfish Immunol 2022; 126:318-326. [PMID: 35654386 DOI: 10.1016/j.fsi.2022.05.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 05/16/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
YccA is a hydrophobic protein with seven transmembrane domains. The function of YccA is largely unknown in pathogenic bacteria. Edwardsiella piscicide (formerly known as E. tarda) is an aquatic pathogen that can infect various economically important fish, including flounder (Paralichthys olivaceus) and tilapia (Oreochromis niloticus). In this study, we investigated the role of YccA in E. piscicida by the construction of a mar kerless yccA in-frame mutant strain, TX01ΔyccA. We found that (i) in comparison to the wild type TX01, TX01ΔyccA exhibited markedly compromised tolerance to high temperature and tobramycin; (ii) deletion of yccA significantly impaired the integrity of the cell membrane and retarded bacterial biofilm formation and mobility; (iii) deficiency of yccA reduced bacterial adhesion and invasion of fish cells and immune tissues, while the introduction of a trans-expressed yccA gene restored the lost virulence of TX01ΔyccA; and (iv) host immune responses induced by TX01 and TX01ΔyccA were different in terms of reactive oxygen species (ROS) levels and expression levels of cytokines. Taken together, the results of our study indicate that YccA is a novel virulence factor of E. piscicida, and YccA is essential for bacterial pathogenicity through evasion of the host's innate immune functions.
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Affiliation(s)
- Mengru Jin
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing, 163319, China; Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, CATAS, Haikou, 571101, China
| | - Jiaojiao He
- Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, CATAS, Haikou, 571101, China; School of Life Sciences, Hainan University, Haikou, 570228, China
| | - Jun Li
- School of Science and Medicine, Lake Superior State University, Sault Ste. Marie, Michigan, 49783, USA
| | - Yonghua Hu
- Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, CATAS, Haikou, 571101, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266071, China; Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Haikou, 571101, China
| | - Dongmei Sun
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing, 163319, China.
| | - Hanjie Gu
- Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, CATAS, Haikou, 571101, China; Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Haikou, 571101, China.
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15
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Lima de Souza Gonçalves V, Cordeiro Santos ML, Silva Luz M, Santos Marques H, de Brito BB, França da Silva FA, Souza CL, Oliveira MV, de Melo FF. From Helicobacter pylori infection to gastric cancer: Current evidence on the immune response. World J Clin Oncol 2022; 13:186-199. [PMID: 35433296 PMCID: PMC8966509 DOI: 10.5306/wjco.v13.i3.186] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 07/31/2021] [Accepted: 02/16/2022] [Indexed: 02/06/2023] Open
Abstract
Gastric cancer (GC) is the result of a multifactorial process whose main components are infection by Helicobacter pylori (H. pylori), bacterial virulence factors, host immune response and environmental factors. The development of the neoplastic microenvironment also depends on genetic and epigenetic changes in oncogenes and tumor suppressor genes, which results in deregulation of cell signaling pathways and apoptosis process. This review summarizes the main aspects of the pathogenesis of GC and the immune response involved in chronic inflammation generated by H. pylori.
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Affiliation(s)
| | - Maria Luísa Cordeiro Santos
- Universidade Federal da Bahia, Instituto Multidisciplinar em Saúde, Vitória da Conquista 45029-094, Bahia, Brazil
| | - Marcel Silva Luz
- Universidade Federal da Bahia, Instituto Multidisciplinar em Saúde, Vitória da Conquista 45029-094, Bahia, Brazil
| | - Hanna Santos Marques
- Universidade Estadual do Sudoeste da Bahia, Campus Vitória da Conquista, Vitória da Conquista 45083-900, Bahia, Brazil
| | - Breno Bittencourt de Brito
- Universidade Federal da Bahia, Instituto Multidisciplinar em Saúde, Vitória da Conquista 45029-094, Bahia, Brazil
| | | | - Cláudio Lima Souza
- Universidade Federal da Bahia, Instituto Multidisciplinar em Saúde, Vitória da Conquista 45029-094, Bahia, Brazil
| | - Márcio Vasconcelos Oliveira
- Universidade Federal da Bahia, Instituto Multidisciplinar em Saúde, Vitória da Conquista 45029-094, Bahia, Brazil
| | - Fabrício Freire de Melo
- Universidade Federal da Bahia, Instituto Multidisciplinar em Saúde, Vitória da Conquista 45029-094, Bahia, Brazil
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Kusakisako K, Miyata T, Fujisaki K, Tanaka T. Host Immunization with Recombinant Tick Antigen and Evaluation of Host Immune Response. Methods Mol Biol 2022; 2411:331-41. [PMID: 34816414 DOI: 10.1007/978-1-0716-1888-2_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Ticks are classified as hematophagous arthropods and transfer a variety of pathogens-such as viruses, bacteria, and protozoans-to vertebrate hosts during blood feeding. These transmitted pathogens cause infectious diseases that continue to affect both humans and animals worldwide. Chemical acaricides are commonly used for tick control to prevent infectious diseases. However, the continuous use of acaricides leads to the emergence of acaricide-resistant tick species; thus, alternative methods for tick control are necessary. Vaccination of vertebrate hosts with tick-derived molecules is considered to be a better alternative against ticks than chemical acaricides because ticks feed on host blood for several days and also concentrate the host blood with antibodies. On the other hand, the host's immune responses against pathogens mainly take two pathways-Th1 (cell-mediated immunity) and Th2 (humoral immunity) pathways. Thus, the vaccine can suggest which immune pathway is more important for vaccination. This chapter describes the procedures of immunizing laboratory animals-mice-with a recombinant tick protein for the preliminary evaluation of its potential as an anti-tick vaccine candidate. In addition, the method of evaluating the antigen-specific antibody production in the host using ELISA is described, as is the subsequent tick-infestation challenge for determining the effectiveness of vaccination.
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Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a novel type b coronavirus responsible for the COVID-19 pandemic. With over 224 million confirmed infections with this virus and more than 4.6 million people dead because of it, it is critically important to define the immunological processes occurring in the human response to this virus and pathogenetic mechanisms of its deadly manifestation. This perspective focuses on the contribution of the recently discovered interaction of SARS-CoV-2 Spike protein with neuropilin 1 (NRP1) receptor, NRP1 as a virus entry receptor for SARS-CoV-2, its role in different physiologic and pathologic conditions, and the potential to target the Spike-NRP1 interaction to combat virus infectivity and severe disease manifestations.
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Affiliation(s)
- Svetlana P Chapoval
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA.
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, 800 West Baltimore Street, Baltimore, MD, 21201, USA.
- Program in Oncology at the Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA.
- SemaPlex LLC, Ellicott City, MD, USA.
| | - Achsah D Keegan
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, 800 West Baltimore Street, Baltimore, MD, 21201, USA
- Program in Oncology at the Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
- VA Maryland Health Care System, Baltimore VA Medical Center, Baltimore, MD, USA
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Pereverzeva L, Uhel F, Peters Sengers H, Cremer OL, Schultz MJ, Bonten MMJ, Scicluna BP, van der Poll T; MARS consortium. Association between delay in intensive care unit admission and the host response in patients with community-acquired pneumonia. Ann Intensive Care 2021; 11:142. [PMID: 34585271 DOI: 10.1186/s13613-021-00930-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 09/20/2021] [Indexed: 12/12/2022] Open
Abstract
Background A delay in admission to the intensive care unit (ICU) of patients with community-acquired pneumonia (CAP) has been associated with an increased mortality. Decisions regarding interventions and eligibility for immune modulatory therapy are often made at the time of admission to the ICU. The primary aim of this study was to compare the host immune response measured upon ICU admission in CAP patients admitted immediately from the emergency department (direct ICU admission) with those who were transferred within 72 h after admission to the general ward (delayed ICU admission). Methods Sixteen host response biomarkers providing insight in pathophysiological mechanisms implicated in sepsis and blood leukocyte transcriptomes were analysed in patients with CAP upon ICU admission in two tertiary hospitals in the Netherlands. Results Of 530 ICU admissions with CAP, 387 (73.0%) were directly admitted and 143 (27.0%) had a delayed admission. Patients with a delayed ICU admission were more often immunocompromised (35.0 versus 21.2%, P = .002) and had more malignancies (23.1 versus 13.4%, P = .011). Shock was more present in patients who were admitted to the ICU directly (46.6 versus 33.6%, P = .010). Delayed ICU admission was not associated with an increased hospital mortality risk (hazard ratio 1.25, 95% CI 0.89–1.78, P = .20). The plasma levels of biomarkers (n = 297) reflecting systemic inflammation, endothelial cell activation and coagulation activation were largely similar between groups, with exception of C-reactive protein, soluble intercellular adhesion molecule-1 and angiopoietin-1, which were more aberrant in delayed admissions compared to direct ICU admissions. Blood leukocyte transcriptomes (n = 132) of patients with a delayed ICU admission showed blunted innate and adaptive immune response signalling when compared with direct ICU admissions, as well as decreased gene expression associated with tissue repair and extracellular matrix remodelling pathways. Conclusions Blood leukocytes of CAP patients with delayed ICU admission show evidence of a more immune suppressive phenotype upon ICU admission when compared with blood leukocytes from patients directly transferred to the ICU. Trial registration: Molecular Diagnosis and Risk Stratification of Sepsis (MARS) project, ClinicalTrials.gov identifier NCT01905033. Supplementary Information The online version contains supplementary material available at 10.1186/s13613-021-00930-5.
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Zao X, Zhou Y, Liang Y, Cao X, Chen H, Li X, Ye Y. The host immune response of a discharged COVID-19 patient with twice reemergence of SARS-CoV-2: a case report. BMC Infect Dis 2021; 21:991. [PMID: 34556058 PMCID: PMC8460193 DOI: 10.1186/s12879-021-06679-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 09/09/2021] [Indexed: 11/13/2022] Open
Abstract
Background The coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has become a global pandemic. There have been reports that long-term SARS-CoV-2 RNA shedding and re-infection of COVID-19 patients existed. However, the specific mechanism, diagnosis, and treatment of COVID-19 are still unclarified. Case presentation In this case, we reported a 64-year-old patient who had a long-term course of COVID-19 for 174 days with two retests of SARS-CoV-2 RNA positive after discharging from the hospital. The patient’s serum immunoglobulin G (IgG) of SARS-CoV-2 tested positive after the initial infection. And during treatment, the CD4 + T cell count and ratio to peripheral blood mononuclear cell (PBMC) were in dynamic change. Conclusions Our results suggested that the host immune system responded with IgG production after SARS-CoV-2 infection, but was not protective enough for the patient. The reemergence of SARS-CoV-2 could be related to the cell count and proportion of CD4 + T cells in PBMC. And the increase of CD4 + T cells after treatment may help to clear the virus.
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Affiliation(s)
- Xiaobin Zao
- Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China.,Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China
| | - Yang Zhou
- Beijing Ditan Hospital, Capital Medical University, 8 Jingshun East Street, Chaoyang District, Beijing, 100015, People's Republic of China
| | - Yijun Liang
- Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China.,Institute of Liver Diseases, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China
| | - Xu Cao
- Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China.,Institute of Liver Diseases, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China
| | - Hening Chen
- Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China.,Institute of Liver Diseases, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China
| | - Xiaoke Li
- Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China. .,Institute of Liver Diseases, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China.
| | - Yong'an Ye
- Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China. .,Institute of Liver Diseases, Beijing University of Chinese Medicine, 5 Haiyuncang Rd, Dongcheng District, Beijing, 100700, People's Republic of China.
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20
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Li BW, Fan X, Cao WJ, Tian H, Wang SY, Zhang JY, Lam SM, Song JW, Zhang C, Zhang SH, Xu Z, Xu RN, Fu JL, Huang L, Jiang TJ, Shi M, Wang FS, Shui GH. Systematic Discovery and Pathway Analyses of Metabolic Disturbance in COVID-19. Infect Dis Immun 2021; 1:74-85. [PMID: 38630120 PMCID: PMC8291038 DOI: 10.1097/id9.0000000000000010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Indexed: 12/15/2022]
Abstract
Background The ongoing global coronavirus disease 2019 (COVID-19) pandemic is posing a serious public health threat to nations worldwide. Understanding the pathogenesis of the disease and host immune responses will facilitate the discovery of therapeutic targets and better management of infected patients. Metabolomics technology can provide an unbiased tool to explore metabolic perturbation. Methods Twenty-six healthy controls and 50 COVID-19 patients with mild, moderate, and severe symptoms in the Fifth Medical Center of PLA General Hospital from January 22 to February 16, 2020 were recruited into the study. Fasting blood samples were collected and subject to metabolomics analysis by liquid chromatography-mass spectrometry. Metabolite abundance was measured by peak area and was log-transformed before statistical analysis. The principal component analysis, different expression analysis, and metabolic pathway analysis were performed using R package. Co-regulated metabolites and their associations with clinical indices were identified by the weighted correlation network analysis and Spearman correlation coefficients. The potential metabolite biomarkers were analyzed using a random forest model. Results We uncovered over 100 metabolites that were associated with COVID-19 disease and many of them correlated with disease severity. Sets of highly correlated metabolites were identified and their correlations with clinical indices were presented. Further analyses linked the differential metabolites with biochemical reactions, metabolic pathways, and biomedical MeSH terms, offering contextual insights into disease pathogenesis and host responses. Finally, a panel of metabolites was discovered to be able to discriminate COVID-19 patients from healthy controls, and also another list for mild against more severe cases. Our findings showed that in COVID-19 patients, citrate cycle, sphingosine 1-phosphate in sphingolipid metabolism, and steroid hormone biosynthesis were downregulated, while purine metabolism and tryptophan metabolism were disturbed. Conclusion This study discovered key metabolites as well as their related biological and medical concepts pertaining to COVID-19 pathogenesis and host immune response, which will facilitate the selection of potential biomarkers for prognosis and discovery of therapeutic targets.
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Affiliation(s)
- Bo-Wen Li
- LipidALL Technologies Company Limited, Changzhou, Jiangsu 213022, China
| | - Xing Fan
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Wen-Jing Cao
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
- Bengbu Medical University, Bengbu, Anhui 233000, China
| | - He Tian
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Si-Yu Wang
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Ji-Yuan Zhang
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Sin Man Lam
- LipidALL Technologies Company Limited, Changzhou, Jiangsu 213022, China
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jin-Wen Song
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Chao Zhang
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Shao-Hua Zhang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Zhe Xu
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Ruo-Nan Xu
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Jun-Liang Fu
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Lei Huang
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Tian-Jun Jiang
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Ming Shi
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Fu-Sheng Wang
- Department of Infectious Diseases, Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Guang-Hou Shui
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
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21
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Sahu U, Biswas D, Singh AK, Khare P. Mechanism involved in the pathogenesis and immune response against SARS-CoV-2 infection. Virusdisease 2021;:1-9. [PMID: 33969150 DOI: 10.1007/s13337-021-00687-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 04/08/2021] [Indexed: 12/18/2022] Open
Abstract
SARS CoV-2, a causative agent of human respiratory tract infection, was first identified in late 2019. It is a newly emerging viral disease with unsatisfactory treatments. The virus is highly contagious and has caused pandemic globally. The number of deaths is increasing exponentially, which is an alarming situation for mankind. The detailed mechanism of the pathogenesis and host immune responses to this virus are not fully known. Here we discuss an overview of SARS CoV-2 pathogenicity, its entry and replication mechanism, and host immune response against this deadly pathogen. Understanding these processes will help to lead the development and identification of drug targets and effective therapies.
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22
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Bruno M, Dewi IM, Matzaraki V, ter Horst R, Pekmezovic M, Rösler B, Groh L, Röring RJ, Kumar V, Li Y, Carvalho A, Netea MG, Latgé JP, Gresnigt MS, van de Veerdonk FL. Comparative host transcriptome in response to pathogenic fungi identifies common and species-specific transcriptional antifungal host response pathways. Comput Struct Biotechnol J 2020; 19:647-663. [PMID: 33510868 PMCID: PMC7817431 DOI: 10.1016/j.csbj.2020.12.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 02/07/2023] Open
Abstract
Candidiasis, aspergillosis, and mucormycosis cause the majority of nosocomial fungal infections in immunocompromised patients. Using an unbiased transcriptional profiling in PBMCs exposed to the fungal species causing these infections, we found a core host response in healthy individuals that may govern effective fungal clearance: it consists of 156 transcripts, involving canonical and non-canonical immune pathways. Systematic investigation of key steps in antifungal host defense revealed fungal-specific signatures. As previously demonstrated, Candida albicans induced type I and Type II interferon-related pathways. In contrast, central pattern recognition receptor, reactive oxygen species production, and host glycolytic pathways were down-regulated in response to Rhizopus oryzae, which was associated with an ER-stress response. TLR5 was identified to be uniquely regulated by Aspergillus fumigatus and to control cytokine release in response to this fungus. In conclusion, our data reveals the transcriptional profiles induced by C. albicans, A. fumigatus, and R. oryzae, and describes both the common and specific antifungal host responses that could be exploited for novel therapeutic strategies.
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Affiliation(s)
- Mariolina Bruno
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
| | - Intan M.W. Dewi
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
| | - Vicky Matzaraki
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
| | - Rob ter Horst
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
| | - Marina Pekmezovic
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute, Beutenbergstraße 11a 07745, Jena, Germany
| | - Berenice Rösler
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
| | - Laszlo Groh
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
| | - Rutger J. Röring
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
| | - Vinod Kumar
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Yang Li
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
- Centre for Individualised Infection Medicine (CiiM) and TWINCORE, Joint Ventures between the Helmholtz-Centre for Infection Research (HZI) and the Hannover Medical School (MHH), Hannover, Germany
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Agostinho Carvalho
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Guimarães/Braga, Portugal
| | - Mihai G. Netea
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
- Department for Genomics & Immunoregulation, Life and Medical Sciences Institute (LIMES), University of Bonn, 53115 Bonn, Germany
| | | | - Mark S. Gresnigt
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
- Junior Research Group Adaptive Pathogenicity Strategies, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knöll Institute, Beutenbergstraße 11a 07745, Jena, Germany
| | - Frank L. van de Veerdonk
- Department of Internal Medicine and Radboudumc Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, The Netherlands
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23
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Tomasicchio M, Limberis J, van der Merwe R, Jacobson R, Meldau R, Theron G, Nicol M, Warren R, Dheda K. Differential RD-1-specific IFN-γ host responses to diverse Mycobacterium tuberculosis strains in HIV-uninfected persons may be explained by genotypic variation in the ESX-1 region. Int J Infect Dis 2020; 96:240-243. [PMID: 32339714 DOI: 10.1016/j.ijid.2020.04.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 04/19/2020] [Accepted: 04/21/2020] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES Between-person variability in T-cell-specific interferon-gamma release assay (IGRA) responses and discordance between IGRA test formats are poorly understood. METHODS We evaluated the IFN-γ responses (QuantiFERON-TB Gold-In-Tube [QFT-GIT] and TSPOT-TB) stratified according to the Mycobacterium tuberculosis spoligotype of the culture isolate obtained from the same patients with confirmed active tuberculosis (n = 91). We further analysed differences within the RD-1-encoding ESX-1 region between the different strain types using whole genome sequencing. RESULTS In HIV-uninfected patients, TSPOT.TB and QFT-GIT IFN-γ responses were 5-fold (p < 0.01) and 2-fold higher (p < 0.05) for those infected with family 33 compared to the LAM strain (additionally, TSPOT.TB responses were 5.6-fold [p < 0.05] and 2.6-fold higher [p < 0.05] for the patients infected with the family 33 versus the X strain and Beijing versus the LAM strain, respectively). Multivariate analysis revealed that strain type (determined by spoligotyping) was independently associated with the magnitude of the IGRA response (varied by IGRA test type) and this is likely explained by variability in the ESX-1 region of Mycobacteriumtuberculosis (determined by next-generation sequencing). CONCLUSIONS These data have implications for the understanding of between-person heterogeneity in IGRA responses, Mycobateriumtuberculosis-specific host immunity, and the discordance between different IGRA test formats.
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Affiliation(s)
- Michele Tomasicchio
- Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute & South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa
| | - Jason Limberis
- Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute & South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa
| | - Ruben van der Merwe
- Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - Rachael Jacobson
- Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Richard Meldau
- Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute & South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa
| | - Grant Theron
- Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Health Sciences, Stellenbosch University, Cape Town, South Africa; Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute & South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa
| | - Mark Nicol
- Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Rob Warren
- Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - Keertan Dheda
- Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute & South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa; Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town, South Africa; Faculty of Infectious and Tropical Diseases, Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, UK.
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24
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Barichello T, Giridharan VV, Bhatti G, Sayana P, Doifode T, Macedo D, Quevedo J. Inflammation as a Mechanism of Bipolar Disorder Neuroprogression. Curr Top Behav Neurosci 2020; 48:215-237. [PMID: 33040314 DOI: 10.1007/7854_2020_173] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Bipolar disorder (BD) is a severe, debilitating psychiatric condition with onset in adolescence or young adulthood and often follows a relapsing and remitting course throughout life. The concept of neuroprogression in BD refers to the progressive path with an identifiable trajectory that takes place with recurrent mood episodes, which eventually leads to cognitive, functional, and clinical deterioration in the course of BD. Understanding the biological basis of neuroprogression helps to explain the subset of BD patients who experience worsening of their disorder over time. Additionally, the study of the neurobiological mechanisms underpinning neuroprogression will help BD staging based on systems biology. Replicated epidemiological studies have suggested inflammatory mechanisms as primary contributors to the neuroprogression of mood disorders. It is known that dysregulated inflammatory/immune pathways are often associated with BD pathophysiology. Hence, in this chapter, we focus on the evidence for the involvement of inflammation and immune regulated pathways in the neurobiological consequences of BD neuroprogression. Herein we put forth the evidence of immune markers from autoimmune disorders, chronic infections, and gut-brain axis that lead to BD neuroprogression. Further, we highlighted the peripheral and central inflammatory components measured along with BD progression.
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Affiliation(s)
- Tatiana Barichello
- Translational Psychiatry Program, Faillace Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA. .,Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil. .,Neuroscience Graduate Program, The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, USA.
| | - Vijayasree Vayalanellore Giridharan
- Translational Psychiatry Program, Faillace Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
| | - Gursimrat Bhatti
- Translational Psychiatry Program, Faillace Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
| | - Pavani Sayana
- Translational Psychiatry Program, Faillace Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
| | - Tejaswini Doifode
- Translational Psychiatry Program, Faillace Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
| | - Danielle Macedo
- Neuropsychopharmacology Laboratory, Drug Research, and Development Center, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil.,National Institute for Translational Medicine (INCT-TM, CNPq), Ribeirao Preto, Brazil
| | - Joao Quevedo
- Translational Psychiatry Program, Faillace Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA.,Neuroscience Graduate Program, The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, USA.,Laboratory of Neurosciences, Graduate Program in Health Sciences, University of Southern Santa Catarina-UNESC, Criciúma, SC, Brazil.,Center of Excellence on Mood Disorders, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
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25
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Cheng X, Fei J, Kondyurin A, Fu K, Ye L, Bilek MMM, Bao S. Enhanced biocompatibility of polyurethane-type shape memory polymers modified by plasma immersion ion implantation treatment and collagen coating: An in vivo study. Mater Sci Eng C Mater Biol Appl 2019; 99:863-74. [PMID: 30889761 DOI: 10.1016/j.msec.2019.02.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 02/06/2019] [Accepted: 02/10/2019] [Indexed: 01/23/2023]
Abstract
As one of the promising smart materials, polyurethane-type shape memory polymers (SMPU) have been extensively investigated as potential biomedical implant materials. However, the hydrophobicity and bio-inertness of SMPU are major problems for biomedical applications. We applied plasma immersion ion implantation (PIII) to increase surface wettability and enable one-step covalent, functionalisation of SMPU with biological molecules to create a tuneable, biocompatible surface. The changes of surface properties due to PIII treatment in nitrogen plasma were determined by measurements of morphology, contact angle, surface energy, and nanoindentation. Collagen attachment on SMPU with and without PIII treatment was measured by Attenuated total reflectance-Fourier transform infrared (ATR-FTIR). To investigate in vivo biocompatibility, SMPU with/without PIII and with/without collagen were subcutaneously implanted in mice. SMPU implants with surrounding tissue were collected at days 1, 3, 7, 14 and 28 to study acute/subacute inflammatory responses at histopathological and immunohistochemical levels. The results show that PIII treatment improves wettability and releases residual stress in the SMPU surfaces substantially. Covalent attachment of collagen on PIII treated SMPU in a single step incubation was demonstrated by its resistance to removal by rigorous Sodium Dodecyl Sulfonate (SDS) washing. The in-vivo results showed significantly lower acute/subacute inflammation in response to SMPU with PIII treatment + collagen coating compared to untreated SMPU, collagen coated untreated SMPU, and PIII treated SMPU, characterised by lower total cell numbers, macrophages, neovascularisation, cellular proliferation, cytokine production, and matrix metalloproteinase production. This comprehensive in vivo study of PIII treatment with protein coating demonstrates that the combination of PIII treatment and collagen coating is a promising approach to enhance the biocompatibility of SMPU, facilitating its application as an implantable biomaterial.
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26
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Francis IP, Islam EA, Gower AC, Shaik-Dasthagirisaheb YB, Gray-Owen SD, Wetzler LM. Murine host response to Neisseria gonorrhoeae upper genital tract infection reveals a common transcriptional signature, plus distinct inflammatory responses that vary between reproductive cycle phases. BMC Genomics 2018; 19:627. [PMID: 30134832 PMCID: PMC6106831 DOI: 10.1186/s12864-018-5000-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 08/08/2018] [Indexed: 01/13/2023] Open
Abstract
Background The emergence of fully antimicrobial resistant Neisseria gonorrhoeae has led global public health agencies to identify a critical need for next generation anti-gonococcal pharmaceuticals. The development and success of these compounds will rely upon valid pre-clinical models of gonorrhoeae infection. We recently developed and reported the first model of upper genital tract gonococcal infection. During initial characterization, we observed significant reproductive cycle-based variation in infection outcome. When uterine infection occurred in the diestrus phase, there was significantly greater pathology than during estrus phase. The aim of this study was to evaluate transcriptional profiles of infected uterine tissue from mice in either estrus or diestrus phase in order to elucidate possible mechanisms for these differences. Results Genes and biological pathways with phase-independent induction during infection showed a chemokine dominant cytokine response to Neisseria gonorrhoeae. Despite general induction being phase-independent, this common anti-gonococcal response demonstrated greater induction during diestrus phase infection. Greater activity of granulocyte adhesion and diapedesis regulators during diestrus infection, particularly in chemokines and diapedesis regulators, was also shown. In addition to a greater induction of the common anti-gonococcal response, Gene Set Enrichment Analysis identified a diestrus-specific induction of type-1 interferon signaling pathways. Conclusions This transcriptional analysis of murine uterine gonococcal infection during distinct points in the natural reproductive cycle provided evidence for a common anti-gonococcal response characterized by significant induction of granulocyte chemokine expression and high proinflammatory mediators. The basic biology of this host response to N. gonorrhoeae in estrus and diestrus is similar at the pathway level but varies drastically in magnitude. Overlaying this, we observed type-1 interferon induction specifically in diestrus infection where greater pathology is observed. This supports recent work suggesting this pathway has a significant, possibly host-detrimental, function in gonococcal infection. Together these findings lay the groundwork for further examination of the role of interferons in gonococcal infection. Additionally, this work enables the implementation of the diestrus uterine infection model using the newly characterized host response as a marker of pathology and its prevention as a correlate of candidate vaccine efficacy and ability to protect against the devastating consequences of N. gonorrhoeae-associated sequelae. Electronic supplementary material The online version of this article (10.1186/s12864-018-5000-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ian P Francis
- Department of Microbiology, Boston University School of Medicine, 72 E. Concord St., Room L504, Boston, MA, 02118, USA
| | - Epshita A Islam
- Department of Molecular Genetics, University of Toronto, Room 4383, Medical Sciences Building, 1 King's College Circle, Toronto, ON, M5S1A8, Canada
| | - Adam C Gower
- Clinical and Translational Science Institute, Boston University School of Medicine, 715 Albany St. E-727, Boston, MA, 02118, USA
| | | | - Scott D Gray-Owen
- Department of Molecular Genetics, University of Toronto, Room 4383, Medical Sciences Building, 1 King's College Circle, Toronto, ON, M5S1A8, Canada
| | - Lee M Wetzler
- Department of Medicine, Boston University School of Medicine, 715 Albany St. E-113, Boston, MA, 02118, USA. .,Department of Microbiology, Boston University School of Medicine, 72 E. Concord St., Room L504, Boston, MA, 02118, USA.
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Kusakisako K, Fujisaki K, Tanaka T. The multiple roles of peroxiredoxins in tick blood feeding. Exp Appl Acarol 2018; 75:269-280. [PMID: 30030662 DOI: 10.1007/s10493-018-0273-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 06/20/2018] [Indexed: 06/08/2023]
Abstract
Hydrogen peroxide (H2O2) and hydroxyl radicals (HO·) are generated through partial reduction of oxygen. The HO· are the most reactive and have a shorter half-life than H2O2, they are produced from comparatively stable H2O2 through Fenton reaction. Although controlling HO· is important and biologically advantageous for organisms, it may be difficult. Ticks are obligate hematophagous arthropods that need blood feeding for development. Ticks feed on vertebrate blood containing high levels of iron. Ticks also concentrate iron-containing host blood, leading to high levels of iron in ticks. Host-derived iron may react with oxygen in the tick body, resulting in high concentrations of H2O2. On the other hand, ticks have antioxidant enzymes, such as peroxiredoxins (Prxs), to scavenge H2O2. Gene silencing of Prxs in ticks affects their blood feeding, oviposition, and H2O2 concentration. Therefore, Prxs could play important roles in ticks' blood feeding and oviposition through the regulation of the H2O2 concentration. This review discusses the current knowledge of Prxs in hard ticks. Tick Prxs are also multifunctional molecules related to antioxidants and immunity like other organisms. In addition, tick Prxs play a role in regulating the host immune response for ticks' survival in the host body. Tick Prx also can induce Th2 immune response in the host. Thus, this review would contribute to the further understanding of the tick's antioxidant responses during blood feeding and the search for a candidate target for tick control.
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Affiliation(s)
- Kodai Kusakisako
- Laboratory of Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890-0065, Japan
- Department of Pathological and Preventive Veterinary Science, The United Graduate School of Veterinary Science, Yamaguchi University, Yoshida, Yamaguchi, 753-8515, Japan
| | - Kozo Fujisaki
- National Agricultural and Food Research Organization, Tsukuba, Ibaraki, 305-0856, Japan
| | - Tetsuya Tanaka
- Laboratory of Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890-0065, Japan.
- Department of Pathological and Preventive Veterinary Science, The United Graduate School of Veterinary Science, Yamaguchi University, Yoshida, Yamaguchi, 753-8515, Japan.
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Wang J, Sun Y, Meng XY, Li LF, Li Y, Luo Y, Wang W, Yu S, Yin C, Li S, Qiu HJ. Comprehensive evaluation of the host responses to infection with differentially virulent classical swine fever virus strains in pigs. Virus Res 2018; 255:68-76. [PMID: 29953916 DOI: 10.1016/j.virusres.2018.06.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 06/20/2018] [Accepted: 06/22/2018] [Indexed: 10/28/2022]
Abstract
Classical swine fever virus (CSFV) infection causes most variable clinical syndromes from chronic or latent infection to acute death, and it is generally acknowledged that the course of disease is affected by both virus and host factors. To compare host immune responses to differentially virulent CSFV strains in pigs, fifteen 8-week-old specific-pathogen-free pigs were randomly divided into four groups and inoculated with the CSFV Shimen strain (a highly virulent strain), the HLJZZ2014 strain (a moderately virulent strains), C-strain (an avirulent strain), and DMEM (mock control), respectively. Infection with the Shimen or HLJZZ2014 strain resulted in fever, clinical signs and histopathological lesions, which were not observed in the C-strain-inoculated pigs, though low viral genome copies were detected in the peripheral blood and tissue samples. The data showed that the virulence of the strains affected the outcome of duration and intensity of the disease rather than the tissue tropism of the virus. Furthermore, leukopenia, lymphocytopenia, differentiation of T-cells, and the secretion of cytokines associated with inflammation or apoptosis such as interferon alpha (IFN-α), tumor necrosis factor alpha (TNF-α), interleukin 2 (IL-2), IL-4, IL-6, and IL-10 were induced by the virulent CSFV infection, the differences reflected in onset and extent of the regulation. Taken together, our results revealed that the major differences among the three strains resided in the kinetics of host response to the infection: severe and immediate with the highly virulent strain, while progressive and delayed with the moderately virulent one. This comparative study will help to dissect the pathogenesis of CSFV.
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Affiliation(s)
- Jinghan Wang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yuan Sun
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Xing-Yu Meng
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Lian-Feng Li
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yongfeng Li
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yuzi Luo
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Wenjing Wang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China; College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Shaoxiong Yu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Caixia Yin
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China; College of Animal Science, Yangtze University, Jingzhou, China
| | - Su Li
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China.
| | - Hua-Ji Qiu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China.
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Rola-Łuszczak M, Materniak-Kornas M, Pluta A, Podgórska K, Nielsen J, Stadejek T, Kuźmak J. Transcriptional profiles of PBMCs from pigs infected with three genetically diverse porcine reproductive and respiratory syndrome virus strains. Mol Biol Rep 2018; 45:675-88. [PMID: 29882085 DOI: 10.1007/s11033-018-4204-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 05/31/2018] [Indexed: 01/23/2023]
Abstract
Porcine reproductive and respiratory syndrome virus is the cause of reproductive failure in sows and respiratory disease in young pigs, which has been considered as one of the most costly diseases to the worldwide pig industry for almost 30 years. This study used microarray-based transcriptomic analysis of PBMCs from experimentally infected pigs to explore the patterns of immune dysregulation after infection with two East European PRRSV strains from subtype 2 (BOR and ILI) in comparison to a Danish subtype 1 strain (DAN). Transcriptional profiles were determined at day 7 post infection in three tested groups of pigs and analysed in comparison with the expression profile of control group. Microarray analysis revealed differential regulation (> 1.5-fold change) of 4253 and 7335 genes in groups infected with BOR and ILI strains, respectively, and of 12518 genes in pigs infected with Danish strain. Subtype 2 PRRSV strains showed greater induction of many genes, especially those involved in innate immunity, such as interferon stimulated antiviral genes and inflammatory markers. Functional analysis of the microarray data revealed a significant up-regulation of genes involved in processes such as acute phase response, granulocyte and agranulocyte adhesion and diapedesis, as well as down-regulation of genes enrolled in pathways engaged in protein synthesis, cell division, as well as B and T cell signaling. This study provided an insight into the host response to three different PRRSV strains at a molecular level and demonstrated variability between strains of different pathogenicity level.
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Sigal GB, Segal MR, Mathew A, Jarlsberg L, Wang M, Barbero S, Small N, Haynesworth K, Davis JL, Weiner M, Whitworth WC, Jacobs J, Schorey J, Lewinsohn DM, Nahid P. Biomarkers of Tuberculosis Severity and Treatment Effect: A Directed Screen of 70 Host Markers in a Randomized Clinical Trial. EBioMedicine 2017; 25:112-121. [PMID: 29100778 PMCID: PMC5704068 DOI: 10.1016/j.ebiom.2017.10.018] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 10/15/2017] [Accepted: 10/19/2017] [Indexed: 01/19/2023] Open
Abstract
More efficacious treatment regimens are needed for tuberculosis, however, drug development is impeded by a lack of reliable biomarkers of disease severity and of treatment effect. We conducted a directed screen of host biomarkers in participants enrolled in a tuberculosis clinical trial to address this need. Serum samples from 319 protocol-correct, culture-confirmed pulmonary tuberculosis patients treated under direct observation as part of an international, phase 2 trial were screened for 70 markers of infection, inflammation, and metabolism. Biomarker assays were specifically developed for this study and quantified using a novel, multiplexed electrochemiluminescence assay. We evaluated the association of biomarkers with baseline characteristics, as well as with detailed microbiologic data, using Bonferroni-adjusted, linear regression models. Across numerous analyses, seven proteins, SAA1, PCT, IL-1β, IL-6, CRP, PTX-3 and MMP-8, showed recurring strong associations with markers of baseline disease severity, smear grade and cavitation; were strongly modulated by tuberculosis treatment; and had responses that were greater for patients who culture-converted at 8weeks. With treatment, all proteins decreased, except for osteocalcin, MCP-1 and MCP-4, which significantly increased. Several previously reported putative tuberculosis-associated biomarkers (HOMX1, neopterin, and cathelicidin) were not significantly associated with treatment response. In conclusion, across a geographically diverse and large population of tuberculosis patients enrolled in a clinical trial, several previously reported putative biomarkers were not significantly associated with treatment response, however, seven proteins had recurring strong associations with baseline radiographic and microbiologic measures of disease severity, as well as with early treatment response, deserving additional study.
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Affiliation(s)
- G B Sigal
- Meso Scale Diagnostics, LLC, Rockville, MD, USA.
| | - M R Segal
- University of California, San Francisco, CA, USA
| | - A Mathew
- Meso Scale Diagnostics, LLC, Rockville, MD, USA
| | - L Jarlsberg
- University of California, San Francisco, CA, USA
| | - M Wang
- Meso Scale Diagnostics, LLC, Rockville, MD, USA
| | - S Barbero
- Meso Scale Diagnostics, LLC, Rockville, MD, USA
| | - N Small
- Meso Scale Diagnostics, LLC, Rockville, MD, USA
| | | | - J L Davis
- Yale School of Public Health and Yale School of Medicine, New Haven, CT, USA
| | - M Weiner
- San Antonio VA Medical Center, San Antonio, TX, USA
| | - W C Whitworth
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - J Jacobs
- Pacific Northwest National Laboratory, Richland, WA, USA
| | - J Schorey
- University of Notre Dame, Notre Dame, IN, USA
| | - D M Lewinsohn
- Oregon Health and Science University, Portland, OR, USA
| | - P Nahid
- University of California, San Francisco, CA, USA.
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Yu YJ. Tenofovir dipivoxil for treatment of chronic hepatitis B patients with gastric ulcer: Efficacy and impact on host immune response. Shijie Huaren Xiaohua Zazhi 2017; 25:1079-1082. [DOI: 10.11569/wcjd.v25.i12.1079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM To evaluate the clinical efficacy of tenofovir dipivoxil in chronic hepatitis B (CHB) patients with gastric ulcer and its effect on host immune response.
METHODS From January 2015 to October 2015, 60 CHB patients with gastric ulcer were randomly divided into a control group (n = 30) and an observation group (n = 30). The control group was treated with adefovir dipivoxil, and the observation group was treated with tenofovir dipivoxil. The immune levels before and after treatment were measured by flow cytometry. The clinical efficacy and the effect on the host immune response were compared between the two groups.
RESULTS There was no significant difference in the rate of viral breakthrough between the two groups (P > 0.05). The ALT normalization rate, HBV DNA negative convsersion rate and HBeAg seroconversion rate in the observation group were significantly higher than those in the control group (P < 0.05). The percentages of CD4+ and CD8+ cells and CD4+/CD8+ ratio in the observation group were significantly higher than those in the control group (P < 0.05). The incidence of adverse reactions was 10.00% in the observation group and 13.33% in the control group. There was no significant difference in the incidence of adverse drug reactions between the two groups (P > 0.05).
CONCLUSION Tenofovir dipivoxil has good efficacy in CHB patients with gastric ulcer and can be used to regulate immunity.
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Lee J, Yu H, Li Y, Ma J, Lang Y, Duff M, Henningson J, Liu Q, Li Y, Nagy A, Bawa B, Li Z, Tong G, Richt JA, Ma W. Impacts of different expressions of PA-X protein on 2009 pandemic H1N1 virus replication, pathogenicity and host immune responses. Virology 2017; 504:25-35. [PMID: 28142079 DOI: 10.1016/j.virol.2017.01.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Revised: 01/20/2017] [Accepted: 01/21/2017] [Indexed: 12/16/2022]
Abstract
Although several studies have investigated the functions of influenza PA-X, the impact of different expressions of PA-X protein including full-length, truncated or PA-X deficient forms on virus replication, pathogenicity and host response remains unclear. Herein, we generated two mutated viruses expressing a full-length or deficient PA-X protein based on the A/California/04/2009 (H1N1) virus that expresses a truncated PA-X to understand three different expressions of PA-X protein on virus replication, pathogenicity and host immune responses. The results showed that expression of either full-length or truncated PA-X protein enhanced viral replication and pathogenicity as well as reduced host innate immune response in mice by host shutoff activity when compared to the virus expressing the deficient PA-X form. Furthermore, the full-length PA-X expression exhibited a greater effect on virus pathogenicity than the truncated PA-X form. Our results provide novel insights of PA-X on viral replication, pathogenicity and host immune responses.
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Affiliation(s)
- Jinhwa Lee
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA
| | - Hai Yu
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA; Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Yonghai Li
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA
| | - Jingjiao Ma
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA
| | - Yuekun Lang
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA
| | - Michael Duff
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA
| | - Jamie Henningson
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA
| | - Qinfang Liu
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA; Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Yuhao Li
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA
| | - Abdou Nagy
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA
| | - Bhupinder Bawa
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA
| | - Zejun Li
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Guangzhi Tong
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Juergen A Richt
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA
| | - Wenjun Ma
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, USA.
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Rashtak S, Ruan X, Druliner BR, Liu H, Therneau T, Mouchli M, Boardman LA. Peripheral Neutrophil to Lymphocyte Ratio Improves Prognostication in Colon Cancer. Clin Colorectal Cancer. 2017;16:115-123.e3. [PMID: 28365393 DOI: 10.1016/j.clcc.2017.01.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 11/17/2016] [Accepted: 01/13/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND We studied the role of peripheral neutrophil to lymphocyte ratio (NLR) on survival outcomes in colon and rectal cancer to determine if its inclusion improved prognostication within existing staging systems. PATIENTS AND METHODS Disease-free (DFS) and overall survival (OS) hazard ratios (HRs) of pretreatment NLR were calculated for 2536 patients with stage I to III colon or rectal cancer and adjusted for age, positive/total number of nodes, T stage, and grade. The association of NLR with clinicopathologic features and survival was evaluated and compared with the American Joint Committee on cancer (AJCC) TNM staging and Memorial Sloan Kettering Cancer Center (MSKCC) models. RESULTS High NLR was significantly associated with worse DFS (HR, 1.36; 95% confidence interval [CI], 1.08-1.70; P = .009) and OS (HR, 1.65; 95% CI, 1.29-2.10; P < .0005) in all stages for patients with colon, but not rectal, cancer. High NLR was significantly associated with site-specific worse prognosis, which was stronger in the left versus right colon; an inverse relationship with grade was found. The impact of high NLR on DFS and OS occurred early, with the majority of deaths within 2 years following surgery. Adjusted HRs for 5-year and 2-year outcomes in colon cancer per each additional 2-unit increase in NLR were 1.15 (95% CI, 1.08-1.23) and 1.20 (95% CI, 1.10-1.30), respectively. The addition of NLR enhanced the prognostic utility of TNM (TNM alone vs. TNM + NLR: concordance index, 0.60 vs. 0.68), and MSKCC (MSKCC alone vs. MSKCC + NLR: concordance index, 0.71 vs. 0.73) models for colon cancer patients. CONCLUSION NLR is an independent prognostic variable for nonmetastatic colon cancer that enhances existing clinical staging systems.
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Weiss SA, Han J, Darvishian F, Tchack J, Han SW, Malecek K, Krogsgaard M, Osman I, Zhong J. Impact of aging on host immune response and survival in melanoma: an analysis of 3 patient cohorts. J Transl Med 2016; 14:299. [PMID: 27760559 PMCID: PMC5070187 DOI: 10.1186/s12967-016-1026-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 09/05/2016] [Indexed: 01/08/2023] Open
Abstract
Background Age has been reported as an independent prognostic factor for melanoma-specific survival (MSS). We tested the hypothesis that age impacts the host anti-tumor immune response, accounting for age-specific survival outcomes in three unique melanoma patient cohorts. Methods We queried the U.S. population-based Surveillance, Epidemiology, and End Results Program (SEER), the prospective tertiary care hospital-based Interdisciplinary Melanoma Cooperative Group (IMCG) biorepository, and the Cancer Genome Atlas (TCGA) biospecimen database to test the association of patient age at time of melanoma diagnosis with clinicopathologic features and survival outcomes. Age groups were defined as ≤45 (young), 46–65 (intermediate), and >65 (older). Each age group in the IMCG and TCGA cohorts was stratified by tumor infiltrating lymphocyte (TIL) measurements and tested for association with MSS. Differential expression of 594 immunoregulatory genes was assessed in a subset of primary melanomas in the IMCG and TCGA cohorts using an integrative pathway analysis. Results We analyzed 304, 476 (SEER), 1241 (IMCG), and 292 (TCGA) patients. Increasing age at melanoma diagnosis in both the SEER and IMCG cohorts demonstrated a positive correlation with tumor thickness, ulceration, stage, and mortality, however age in the TCGA cohort did not correlate with mortality. Older age was associated with shorter MSS in all three cohorts. When the young age group in both the IMCG and TCGA cohorts was stratified by TIL status, there were no differences in MSS. However, older IMCG patients with brisk TILs and intermediate aged TCGA patients with high lymphocyte scores (3–6) had improved MSS. Gene expression analysis revealed top pathways (T cell trafficking, communication, and differentiation) and top upstream regulators (CD3, CD28, IFNG, and STAT3) that significantly changed with age in 84 IMCG and 43 TCGA primary melanomas. Conclusions Older age at time of melanoma diagnosis is associated with shorter MSS, however age’s association with clinicopathologic features is dependent upon specific characteristics of the study population. TIL as a read-out of the host immune response may have greater prognostic impact in patients older than age 45. Recognition of age-related factors negatively impacting host immune responses may provide new insights into therapeutic strategies for the elderly. Electronic supplementary material The online version of this article (doi:10.1186/s12967-016-1026-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sarah A Weiss
- Department of Medicine, NYU School of Medicine, New York, NY, USA.,Interdisciplinary Melanoma Cooperative Group, NYU School of Medicine, New York, NY, USA
| | - Joseph Han
- NYU School of Medicine, New York, NY, USA
| | - Farbod Darvishian
- Interdisciplinary Melanoma Cooperative Group, NYU School of Medicine, New York, NY, USA.,Department of Pathology, NYU School of Medicine, New York, NY, USA
| | - Jeremy Tchack
- Interdisciplinary Melanoma Cooperative Group, NYU School of Medicine, New York, NY, USA.,Ronald O. Perelman Department of Dermatology, NYU School of Medicine, New York, NY, USA
| | - Sung Won Han
- Interdisciplinary Melanoma Cooperative Group, NYU School of Medicine, New York, NY, USA.,Division of Biostatistics, Department of Population Health, NYU School of Medicine, 650 First Ave., Room 512, New York, NY, 10016, USA.,American Express, New York, NY, USA
| | - Karolina Malecek
- Department of Pathology, NYU School of Medicine, New York, NY, USA.,School of Industrial Management Engineering, Korea University, Seoul, South Korea
| | - Michelle Krogsgaard
- Interdisciplinary Melanoma Cooperative Group, NYU School of Medicine, New York, NY, USA.,Department of Pathology, NYU School of Medicine, New York, NY, USA
| | - Iman Osman
- Department of Medicine, NYU School of Medicine, New York, NY, USA.,Interdisciplinary Melanoma Cooperative Group, NYU School of Medicine, New York, NY, USA.,Ronald O. Perelman Department of Dermatology, NYU School of Medicine, New York, NY, USA
| | - Judy Zhong
- Interdisciplinary Melanoma Cooperative Group, NYU School of Medicine, New York, NY, USA. .,Division of Biostatistics, Department of Population Health, NYU School of Medicine, 650 First Ave., Room 512, New York, NY, 10016, USA.
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Weiss SA, Han SW, Lui K, Tchack J, Shapiro R, Berman R, Zhong J, Krogsgaard M, Osman I, Darvishian F. Immunologic heterogeneity of tumor-infiltrating lymphocyte composition in primary melanoma. Hum Pathol 2016; 57:116-125. [PMID: 27473267 DOI: 10.1016/j.humpath.2016.07.008] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 06/22/2016] [Accepted: 07/06/2016] [Indexed: 10/21/2022]
Abstract
Tumor-infiltrating lymphocytes (TILs) in primary melanomas are thought to represent the host antitumor immune response, but controversy exists over whether TILs offer independent prognostication of survival. We studied a cohort of 1241 patients with primary melanoma to assess the association of absent, nonbrisk, and brisk TIL grade with survival outcomes. We tested whether quantitative TIL counts using immunohistochemical lymphocyte markers CD3, CD45, and FOXP3 add prognostic value to TIL grading compared with histology alone in 15% of the cohort. To assess for intergroup immunologic heterogeneity among TIL grades, we investigated differential expression of 594 immunoregulatory genes in 67 primary melanomas. On histologic evaluation of 1241 primary melanomas, TILs were graded as absent (n=388, 31%), nonbrisk (n=330, 27%), and brisk (n=523, 42%). Patients with brisk TILs had improved recurrence-free survival (P=.025) and overall survival (P=.006) compared with patients with nonbrisk and absent TILs, for which there were no differences in recurrence-free survival (P=.40) or overall survival (P=.41). TIL quantitation by immunohistochemistry did not improve prognostication compared with TIL grading on hematoxylin and eosin-stained sections. Melanomas with nonbrisk and absent TILs share similar immunoregulatory gene expression profiles. In contrast, melanomas with brisk TILs demonstrate upregulation of T-cell activation pathways and inhibition of upstream immune checkpoint regulators. The presence of TILs in primary melanomas represents a heterogeneous group, and caution in prognostic interpretation is warranted. Melanomas with brisk TILs are defined by an immunostimulatory gene expression profile and improved prognosis compared with melanomas with nonbrisk or absent TILs.
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Affiliation(s)
- Sarah A Weiss
- Department of Medicine, New York University School of Medicine, New York, NY, USA 10016; Interdisciplinary Melanoma Cooperative Group, New York University School of Medicine, New York, NY, USA 10016.
| | - Sung Won Han
- Department of Population Health, New York University School of Medicine, New York, NY, USA 10016.
| | - Kevin Lui
- Interdisciplinary Melanoma Cooperative Group, New York University School of Medicine, New York, NY, USA 10016; Ronald O. Perelman Department of Dermatology, New York University School of Medicine, New York, NY, USA 10016.
| | - Jeremy Tchack
- Interdisciplinary Melanoma Cooperative Group, New York University School of Medicine, New York, NY, USA 10016; Ronald O. Perelman Department of Dermatology, New York University School of Medicine, New York, NY, USA 10016.
| | - Richard Shapiro
- Interdisciplinary Melanoma Cooperative Group, New York University School of Medicine, New York, NY, USA 10016; Department of Surgery, New York University School of Medicine, New York, NY, USA 10016.
| | - Russell Berman
- Interdisciplinary Melanoma Cooperative Group, New York University School of Medicine, New York, NY, USA 10016; Department of Surgery, New York University School of Medicine, New York, NY, USA 10016.
| | - Judy Zhong
- Interdisciplinary Melanoma Cooperative Group, New York University School of Medicine, New York, NY, USA 10016; Department of Biostatistics, New York University School of Medicine, New York, NY, USA 10016.
| | - Michelle Krogsgaard
- Interdisciplinary Melanoma Cooperative Group, New York University School of Medicine, New York, NY, USA 10016; Department of Pathology, New York University School of Medicine, New York, NY, USA 10016.
| | - Iman Osman
- Department of Medicine, New York University School of Medicine, New York, NY, USA 10016; Interdisciplinary Melanoma Cooperative Group, New York University School of Medicine, New York, NY, USA 10016; Ronald O. Perelman Department of Dermatology, New York University School of Medicine, New York, NY, USA 10016.
| | - Farbod Darvishian
- Interdisciplinary Melanoma Cooperative Group, New York University School of Medicine, New York, NY, USA 10016; Department of Pathology, New York University School of Medicine, New York, NY, USA 10016.
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Chatrath S, Gupta VK, Dixit A, Garg LC. PE_PGRS30 of Mycobacterium tuberculosis mediates suppression of proinflammatory immune response in macrophages through its PGRS and PE domains. Microbes Infect 2016; 18:536-42. [PMID: 27129781 DOI: 10.1016/j.micinf.2016.04.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 04/15/2016] [Accepted: 04/18/2016] [Indexed: 11/25/2022]
Abstract
The success of Mycobacterium tuberculosis as a pathogen relies on its ability to survive inside macrophages and evade host immune mechanisms. M. tuberculosis employs multiple strategies to confer resistance against immune system including inhibition of phago-lysosomal fusion, modulation of cytokine responses and granuloma formation. PE_PGRS proteins, uniquely present in pathogenic mycobacteria, are cell surface molecules that are suggested to interact with host cells. PE_PGRS proteins have also been implicated in its pathogenesis. In the present study, immuno-regulatory property of Rv1651c-encoded PE_PGRS30 protein was explored. Infection of PMA-differentiated human THP-1 macrophages with Mycobacterium smegmatis harbouring pVV(1651c) resulted in reduced production of IL-12, TNF-α and IL-6, as compared to infection with M. smegmatis harbouring the control plasmid pVV16. No differential effect was observed on bacterial persistence inside macrophages or on macrophage mortality upon infection with the two recombinant strains. Infection of THP-1 macrophages with recombinant M. smegmatis expressing deletion variants of PE_PGRS30 indicated that anti-inflammatory function of the protein is possessed by its PGRS and PE domains while the C-terminal domain, when expressed alone, displayed antagonistic effect in terms of TNF-α secretion. These results suggest that PE_PGRS30 interferes with macrophage immune functions important for activation of adaptive T-cell responses.
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Affiliation(s)
- Shweta Chatrath
- Gene Regulation Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Vineet Kumar Gupta
- Gene Regulation Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Aparna Dixit
- Gene Regulation Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India
| | - Lalit C Garg
- Gene Regulation Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India.
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Abstract
Lipoteichoic acid is a major lipid-anchored polymer in Gram-positive bacteria such as
Bacillus subtilis. This polymer typically consists of repeating phosphate-containing units and therefore has a predominant negative charge. The repeating units are attached to a glycolipid anchor which has a diacylglycerol (DAG) moiety attached to a dihexopyranose head group. D-alanylation is known as the major modification of type I and type IV lipoteichoic acids, which partially neutralizes the polymer and plays important roles in bacterial survival and resistance to the host immune system. The biosynthesis pathways of the glycolipid anchor and lipoteichoic acid have been fully characterized. However, the exact mechanism of D-alanyl transfer from the cytosol to cell surface lipoteichoic acid remains unclear. Here I report the use of mass spectrometry in the identification of possible intermediate species in the biosynthesis and D-alanylation of lipoteichoic acid: the glycolipid anchor, nascent lipoteichoic acid primer with one phosphoglycerol unit, as well as mono- and di-alanylated forms of the lipoteichoic acid primer. Monitoring these species as well as the recently reported D-alanyl-phosphatidyl glycerol should aid in shedding light on the mechanism of the D-alanylation pathway of lipoteichoic acid.
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Affiliation(s)
- Yu Luo
- Department of Biochemistry, University of Saskatchewan, Saskatoon, Canada
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38
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Abstract
Lipoteichoic acid is a major lipid-anchored polymer in Gram-positive bacteria such as Bacillus subtilis. This polymer typically consists of repeating phosphate-containing units and therefore has a predominant negative charge. The repeating units are attached to a glycolipid anchor which has a diacylglycerol (DAG) moiety attached to a dihexopyranose head group. D-alanylation is known as the major modification of type I and type IV lipoteichoic acids, which partially neutralizes the polymer and plays important roles in bacterial survival and resistance to the host immune system. The biosynthesis pathways of the glycolipid anchor and lipoteichoic acid have been fully characterized. However, the exact mechanism of D-alanyl transfer from the cytosol to cell surface lipoteichoic acid remains unclear. Here I report the use of mass spectrometry in the identification of possible intermediate species in the biosynthesis and D-alanylation of lipoteichoic acid: the glycolipid anchor, nascent lipoteichoic acid primer with one phosphoglycerol unit, as well as mono- and di-alanylated forms of the lipoteichoic acid primer. Monitoring these species as well as the recently reported D-alanyl-phosphatidyl glycerol should aid in shedding light on the mechanism of the D-alanylation pathway of lipoteichoic acid.
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Affiliation(s)
- Yu Luo
- Department of Biochemistry, University of Saskatchewan, Saskatoon, Canada
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Aldape MJ, Bayer CR, Bryant AE, Stevens DL. A novel murine model of Clostridium sordellii myonecrosis: Insights into the pathogenesis of disease. Anaerobe 2016; 38:103-110. [PMID: 26805011 DOI: 10.1016/j.anaerobe.2016.01.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 01/06/2016] [Accepted: 01/13/2016] [Indexed: 12/22/2022]
Abstract
Clostridium sordellii infections have been reported in women following natural childbirth and spontaneous or medically-induced abortion, injection drug users and patients with trauma. Death is rapid and mortality ranges from 70 to 100%. Clinical features include an extreme leukemoid reaction, the absence of fever, and only minimal pain or erythema at the infected site. In the current study, we developed a murine model of C. sordellii soft tissue infection to elucidate the pathogenic mechanisms. Mice received 0.5, 1.0 or 2.0 × 10(6) CFU C. sordellii (ATCC 9714 type strain) in the right thigh muscle. All doses caused fatal infection characterized by intense swelling of the infected limb but no erythema or visible perfusion deficits. Survival rates and time to death were inoculum dose-dependent. Mice developed a granulocytic leukocytosis with left shift, the onset of which directly correlated with disease severity. Histopathology of infected tissue showed widespread edema, moderate muscle damage and minimal neutrophil infiltration. Circulating levels of granulocyte colony-stimulating factor (G-CSF), soluble tumor necrosis factor receptor I (sTNF-RI) and interlukin-6 (IL-6) were significantly increased in infected animals, while TNF-α, and IL-1β levels were only mildly elevated, suggesting these host factors likely mediate the leukocytosis and innate immune dysfunction characteristic of this infection. Thus, this model mimics many of the salient features of this infection in humans and has allowed us to identify novel targets for intervention.
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Affiliation(s)
- Michael J Aldape
- Veterans Affairs Medical Center, Boise, ID 83702, USA; Northwest Nazarene University, Nampa, ID 83686, USA.
| | | | - Amy E Bryant
- Veterans Affairs Medical Center, Boise, ID 83702, USA; University of Washington School of Medicine, Seattle, WA 98195, USA
| | - Dennis L Stevens
- Veterans Affairs Medical Center, Boise, ID 83702, USA; University of Washington School of Medicine, Seattle, WA 98195, USA
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40
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Abstract
In the past year, a substantial number of (putative) novel Helicobacter species have been described, including Helicobacter himalayensis colonizing the Himalayan marmot and Helicobacter apodemus, colonizing the Korean striped field mouse. In addition, a putative novel gastric Helicobacter species was identified in wild gorillas and chimpanzees, for which the name "Candidatus H. homininae" was proposed. A high incidence of gastric non-H. pylori Helicobacter infection was described in China and multiple case reports have described the involvement of enterohepatic Helicobacter species, especially Helicobacter cinaedi, in a wide range of diseases. Several studies in rodent models further elucidated the mechanisms underlying the development of gastric mucosa-associated lymphoid tissue lymphoma during infection with gastric non-H. pylori Helicobacters. The effects of infection with gastric Helicobacters on the development of neuroinflammation were investigated and several enterohepatic Helicobacter species were shown to affect the composition of the gut microbiota, to influence vaccine efficiency as well as the progression of cancer in distant sites of the body.
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Affiliation(s)
- Bram Flahou
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Emiko Rimbara
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Shigetarou Mori
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Freddy Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Keigo Shibayama
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan
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Vijayakumar P, Mishra A, Ranaware PB, Kolte AP, Kulkarni DD, Burt DW, Raut AA. Analysis of the crow lung transcriptome in response to infection with highly pathogenic H5N1 avian influenza virus. Gene 2015; 559:77-85. [PMID: 25592823 DOI: 10.1016/j.gene.2015.01.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 11/02/2014] [Accepted: 01/10/2015] [Indexed: 12/24/2022]
Abstract
The highly pathogenic avian influenza (HPAI) H5N1 virus, currently circulating in Asia, causes severe disease in domestic poultry as well as wild birds like crow. However, the molecular pathogenesis of HPAIV infection in crows and other wild birds is not well known. Thus, as a step to explore it, a comprehensive global gene expression analysis was performed on crow lungs, infected with HPAI H5N1 crow isolate (A/Crow/India/11TI11/2011) using high throughput next generation sequencing (NGS) (GS FLX Titanium XLR70). The reference genome of crow is not available, so RNA seq analysis was performed on the basis of a de novo assembled transcriptome. The RNA seq result shows, 4052 genes were expressed uniquely in noninfected, 6277 genes were expressed uniquely in HPAIV infected sample and of the 6814 genes expressed in both samples, 2279 genes were significantly differentially expressed. Our transcriptome profile data allows for the ability to understand the molecular mechanism behind the recent lethal HPAIV outbreak in crows which was, until recently, thought to cause lethal infections only in gallinaceous birds such as chickens, but not in wild birds. The pattern of differentially expressed genes suggest that this isolate of H5N1 virus evades the host innate immune response by attenuating interferon (IFN)-inducible signalling possibly by down regulating the signalling from type I IFN (IFNAR1 and IFNAR2) and type II IFN receptors, upregulation of the signalling inhibitors suppressor of cytokine signalling 1 (SOCS1) and SOCS3 and altering the expression of toll-like receptors (TLRs). This may be the reason for disease and mortality in crows.
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Kalmar I, Berndt A, Yin L, Chiers K, Sachse K, Vanrompay D. Host-pathogen interactions in specific pathogen-free chickens following aerogenous infection with Chlamydia psittaci and Chlamydia abortus. Vet Immunol Immunopathol 2015; 164:30-9. [PMID: 25638671 DOI: 10.1016/j.vetimm.2014.12.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 12/05/2014] [Accepted: 12/31/2014] [Indexed: 10/24/2022]
Abstract
Although Chlamydia (C.) psittaci infections are recognized as an important factor causing economic losses and impairing animal welfare in poultry production, the specific mechanisms leading to severe clinical outcomes are poorly understood. In the present study, we comparatively investigated pathology and host immune response, as well as systemic dissemination and expression of essential chlamydial genes in the course of experimental aerogeneous infection with C. psittaci and the closely related C. abortus, respectively, in specific pathogen-free chicks. Clinical signs appeared sooner and were more severe in the C. psittaci-infected group. Compared to C. abortus infection, more intense systemic dissemination of C. psittaci correlated with higher and faster infiltration of immune cells, as well as more macroscopic lesions and epithelial pathology, such as hyperplasia and erosion. In thoracic air sac tissue, mRNA expression of immunologically relevant factors, such as IFN-γ, IL-1β, IL-6, IL-17, IL-22, LITAF and iNOS was significantly stronger up-regulated in C. psittaci- than in C. abortus-infected birds between 3 and 14 days post-infection. Likewise, transcription rates of the chlamydial genes groEL, cpaf and ftsW were consistently higher in C. psittaci during the acute phase. These findings illustrate that the stronger replication of C. psittaci in its natural host also evoked a more intense immune response than in the case of C. abortus infection.
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Affiliation(s)
- Isabelle Kalmar
- Department of Molecular Biotechnology and Immunology, Ghent University, Belgium
| | - Angela Berndt
- Institute of Molecular Pathogenesis, Friedrich-Loeffler-Institut (Federal Research Institute for Animal Health), Jena, Germany
| | - Lizi Yin
- Department of Molecular Biotechnology and Immunology, Ghent University, Belgium
| | - Koen Chiers
- Department of Pathology, Bacteriology and Avian Diseases, Ghent University, Belgium
| | - Konrad Sachse
- Institute of Molecular Pathogenesis, Friedrich-Loeffler-Institut (Federal Research Institute for Animal Health), Jena, Germany.
| | - Daisy Vanrompay
- Department of Molecular Biotechnology and Immunology, Ghent University, Belgium
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43
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Abstract
In the absence of an effective vaccine, the success of the test and removal approach for the control of equine infectious anemia (EIA) cannot be overstated, at least in those areas where testing has been traditionally routine. This article addresses 4 main aspects: what has been learned about EIA virus, host control of its replication, and inapparent carriers; international status regarding the control of EIA; diagnostic and laboratory investigation; and reducing the spread of blood-borne infections by veterinarians. An attempt is made to put these issues into practical contemporary perspectives for the equine practitioner.
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Affiliation(s)
- Charles J Issel
- Department of Veterinary Science, Maxwell H. Gluck Equine Research Center, University of Kentucky, Lexington, KY 40546, USA.
| | - R Frank Cook
- Department of Veterinary Science, Maxwell H. Gluck Equine Research Center, University of Kentucky, Lexington, KY 40546, USA
| | - Robert H Mealey
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, PO Box 647040, Pullman, WA 99164-7040, USA
| | - David W Horohov
- Department of Veterinary Science, Maxwell H. Gluck Equine Research Center, University of Kentucky, Lexington, KY 40546, USA
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44
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Jiawen S, Jianjun Z, Jiewen D, Dedong Y, Hongbo Y, Jun S, Xudong W, Shen SGF, Lihe G. Osteogenic differentiation of human amniotic epithelial cells and its application in alveolar defect restoration. Stem Cells Transl Med 2014; 3:1504-13. [PMID: 25368378 DOI: 10.5966/sctm.2014-0118] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The present study investigated the detailed in vitro osteogenic differentiation process and in vivo bone regenerative property of human amniotic epithelial cells (hAECs). The in vitro osteogenic differentiation process of hAECs was evaluated by biochemical staining, real-time polymerase chain reaction, and immunofluorescence. Next, β-tricalcium phosphate (β-TCP) scaffolds alone or loaded with hAECs were implanted into the alveolar defects of rats. Micro-computed tomography evaluation and histologic studies were conducted. Our results validated the in vitro osteogenic capacity of hAECs by upregulation of Runx2, osterix, alkaline phosphatase, collagen I, and osteopontin, with positive biochemical staining for osteoblasts. An epithelial-mesenchymal transformation process might be involved in the osteogenic differentiation of hAECs by increased expression of transforming growth factor-β1. Our data also demonstrated that in vivo implantation of hAECs loaded on β-TCP scaffolds, not only improved bone regeneration by direct participation, but also reduced the early host immune response to the scaffolds. The presented data indicate that hAECs possess proper osteogenic differentiation potential and a modulatory influence on the early tissue remodeling process, making these cells a potential source of progenitor cells for clinical restoration of the alveolar defect.
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Affiliation(s)
- Si Jiawen
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, People's Republic of China; Shanghai United Stem Cell Biotechnology Co., Ltd., Shanghai, People's Republic of China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Zhang Jianjun
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, People's Republic of China; Shanghai United Stem Cell Biotechnology Co., Ltd., Shanghai, People's Republic of China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Dai Jiewen
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, People's Republic of China; Shanghai United Stem Cell Biotechnology Co., Ltd., Shanghai, People's Republic of China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Yu Dedong
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, People's Republic of China; Shanghai United Stem Cell Biotechnology Co., Ltd., Shanghai, People's Republic of China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Yu Hongbo
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, People's Republic of China; Shanghai United Stem Cell Biotechnology Co., Ltd., Shanghai, People's Republic of China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Shi Jun
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, People's Republic of China; Shanghai United Stem Cell Biotechnology Co., Ltd., Shanghai, People's Republic of China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Wang Xudong
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, People's Republic of China; Shanghai United Stem Cell Biotechnology Co., Ltd., Shanghai, People's Republic of China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Steve G F Shen
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, People's Republic of China; Shanghai United Stem Cell Biotechnology Co., Ltd., Shanghai, People's Republic of China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Guo Lihe
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, People's Republic of China; Shanghai United Stem Cell Biotechnology Co., Ltd., Shanghai, People's Republic of China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, People's Republic of China
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Yu X, Zeng J, Xie J. Navigating through the maze of TLR2 mediated signaling network for better mycobacterium infection control. Biochimie 2014; 102:1-8. [PMID: 24594065 DOI: 10.1016/j.biochi.2014.02.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 02/21/2014] [Indexed: 12/12/2022]
Abstract
Toll-like receptor 2 (TLR2), a member of pattern recognition receptors (PRRs) abundant on macrophages, dendritic cells (DCs) and respiratory epithelial cells lining the lung, plays critical role in host immune response against Mycobacterium tuberculosis (MTB) infection. TLR2-mediated elimination of MTB involves multiple pathways such as promoting DCs maturation, generating biased Th1, Th2, Th17 type response, regulating the macrophage activation and cytokine secretion. MTB can also hijack the TLR2 signaling to subvert the host immunity by dampening the macrophages response to IFN-γ, suppressing the processing and presentation of antigens. This review summarizes the intricate network of TLR2-mediated signaling and Mycobacteria effectors involved in MTB-host interaction with an aim to find better target for improved tuberculosis control, especially the host-derived therapy targets. TLR2 agonists with potential to be included in novel tuberculosis vaccines are also discussed.
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46
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Wei L, Jiao P, Song Y, Cao L, Yuan R, Gong L, Cui J, Zhang S, Qi W, Yang S, Liao M. Host immune responses of ducks infected with H5N1 highly pathogenic avian influenza viruses of different pathogenicities. Vet Microbiol 2013; 166:386-93. [PMID: 23920409 DOI: 10.1016/j.vetmic.2013.06.019] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 06/06/2013] [Accepted: 06/10/2013] [Indexed: 01/22/2023]
Abstract
Our previous studies have illustrated three strains of duck-origin H5N1 highly pathogenic avian influenza viruses (HPAIVs) had varying levels of pathogenicity in ducks (Sun et al., 2011). However, the host immune response of ducks infected with those of H5N1 HPAIVs was unclear. Here, we compared viral distribution and mRNA expression of immune-related genes in ducks following infection with the two HPAIV (A/Duck/Guangdong/212/2004, DK212 and A/Duck/Guangdong/383/2008, DK383). DK383 could replicate in the tested tissue of ducks (brain, spleen, lungs, cloacal bursa, kidney, and pancreas) more rapid and efficiently than DK212 at 1 and 2 days post-inoculation. Quantitative real-time PCR analysis showed that the expression levels of TLR3, IL-6, IL-8, and MHC class II in brains were higher than those of respective genes in lungs during the early stage of post infection. Furthermore, the expression levels of IL-6 and IL-8 in the brain of ducks following infection with DK383 were remarkably higher than those of ducks infected with DK212, respectively. Our results suggest that the shift in the H5N1 HPAIVs to increased virulence in ducks may be associated with efficient and rapid replication of the virus, accompanied by early destruction of host immune responses. These data are helpful to understand the underlying mechanism of the different outcome of H5N1 HPAIVs infection in ducks.
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Affiliation(s)
- Liangmeng Wei
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, China
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47
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Takeuchi H, Zhang YN, Israel DA, Peek Jr RM, Kamioka M, Yanai H, Morimoto N, Sugiura T. Effect of Helicobacter pylori cdrA on interleukin-8 secretions and nuclear factor kappa B activation. World J Gastroenterol 2012; 18:425-34. [PMID: 22346248 PMCID: PMC3270507 DOI: 10.3748/wjg.v18.i5.425] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 05/19/2011] [Accepted: 05/26/2011] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate genetic diversity of Helicobacter pylori (H. pylori) cell division-related gene A (cdrA) and its effect on the host response.
METHODS: Inactivation of H. pylori cdrA, which is involved in cell division and morphological elongation, has a role in chronic persistent infections. Genetic property of H. pylori cdrA was evaluated using polymerase chain reaction and sequencing in 128 (77 American and 51 Japanese) clinical isolates obtained from 48 and 51 patients, respectively. Enzyme-linked immunosorbent assay was performed to measure interleukin-8 (IL-8) secretion with gastric biopsy specimens obtained from American patients colonized with cdrA-positive or -negative strains and AGS cells co-cultured with wild-type HPK5 (cdrA-positive) or its derivative HPKT510 (cdrA-disruptant). Furthermore, the cytotoxin-associated gene A (cagA) status (translocation and phosphorylation) and kinetics of transcription factors [nuclear factor-kappa B (NF-κB) and inhibition kappa B] were investigated in AGS cells co-cultured with HPK5, HPKT510 and its derivative HPK5CA (cagA-disruptant) by western blotting analysis with immunoprecipitation.
RESULTS: Genetic diversity of the H. pylori cdrA gene demonstrated that the cdrA status segregated into two categories including four allele types, cdrA-positive (allele types;Iand II) and cdrA-negative (allele types; III and IV) categories, respectively. Almost all Japanese isolates were cdrA-positive (I: 7.8% and II: 90.2%), whereas 16.9% of American isolates were cdrA-positive (II) and 83.1% were cdrA-negative (III: 37.7% and IV: 45.5%), indicating extended diversity of cdrA in individual American isolates. Comparison of each isolate from different regions (antrum and corpus) in the stomach of 29 Americans revealed that cdrA status was identical in both isolates from different regions in 17 cases. However, 12 cases had a different cdrA allele and 6 of them exhibited a different cdrA category between two regions in the stomach. Furthermore, in 5 of the 6 cases possessing a different cdrA category, cdrA-negative isolate existed in the corpus, suggesting that cdrA-negative strain is more adaptable to colonization in the corpus. IL-8 secretions from AGS revealed that IL-8 levels induced by a cdrA-disrupted HPKT510 was significantly lower (P < 0.01) compared to wild-type HPK5: corresponding to 50%-60% of those of wild-type HPK5. These data coincided with in vivo data that an average value of IL-8 in biopsy specimens from cdrA-positive and cdrA-negative groups was 215.6 and 135.9 pg/mL, respectively. Western blotting analysis documented that HPKT510 had no effect on CagA translocation and phosphorylation, however, nuclear accumulation of NF-κB was lower by HPKT510 compared to HPK5.
CONCLUSION: Colonization by a cdrA-negative or cdrA-dysfunctional strain resulted in decreased IL-8 production and repression of NF-κB, and hence, attenuate the host immunity leading to persistent infection.
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