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Arkin LM, Moon JJ, Tran JM, Asgari S, O'Farrelly C, Casanova JL, Cowen EW, Mays JW, Singh AM, Drolet BA. From Your Nose to Your Toes: A Review of Severe Acute Respiratory Syndrome Coronavirus 2 Pandemic‒Associated Pernio. J Invest Dermatol 2021; 141:2791-2796. [PMID: 34561087 PMCID: PMC8279931 DOI: 10.1016/j.jid.2021.05.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 01/04/2023]
Abstract
Despite thousands of reported patients with pandemic-associated pernio, low rates of seroconversion and PCR positivity have defied causative linkage to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Pernio in uninfected children is associated with monogenic disorders of excessive IFN-1 immunity, whereas severe COVID-19 pneumonia can result from insufficient IFN-1. Moreover, SARS-CoV-2 spike protein and robust IFN-1 response are seen in the skin of patients with pandemic-associated pernio, suggesting an excessive innate immune skin response to SARS-CoV-2. Understanding the pathophysiology of this phenomenon may elucidate the host mechanisms that drive a resilient immune response to SARS-CoV-2 and could produce relevant therapeutic targets.
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Affiliation(s)
- Lisa M Arkin
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - John J Moon
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Jennifer M Tran
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Samira Asgari
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Cliona O'Farrelly
- Comparative Immunology, School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland
| | - Jean-Laurent Casanova
- St. Giles Laboratory of Human Genetics of Infectious Diseases, The Rockefeller University, New York, New York, USA; Howard Hughes Medical Institute, The Rockefeller University, New York, New York, USA
| | - Edward W Cowen
- Dermatology branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institute of Health, Bethesda, Maryland, USA
| | - Jacqueline W Mays
- Oral Immunobiology Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, USA
| | - Anne Marie Singh
- Department of Pediatrics, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Beth A Drolet
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA.
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Akbulut S, Sahin TT. Comment on experience with LDLT in patients with hepatocellular carcinoma and portal vein tumor thrombosis postdownstaging. Int J Surg Case Rep 2020; 74:36-37. [PMID: 32777765 PMCID: PMC7417667 DOI: 10.1016/j.ijscr.2020.07.057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 07/18/2020] [Accepted: 07/19/2020] [Indexed: 02/07/2023] Open
Key Words
- ldlt, living donor liver transplantation
- ds, downstaging
- hcc, hepatocellular carcinoma
- pvtt, portal vein tumor thrombus
- lt, liver transplantation
- mdct, multidetector computerized tomography
- mri, magnetic resonance imaging
- afp, alfa-feto protein
- lld, living liver donors
- grwr, graft to recipient weight ratio
- meld, model for end stage liver disease
- bmi, body mass index
- hbv, hepatitis b virus
- hcv, hepatitis c virus
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Affiliation(s)
- Sami Akbulut
- Department of Surgery and Liver Transplant Institute, Inonu University, Faculty of Medicine, 244280, Malatya, Turkey.
| | - Tevfik Tolga Sahin
- Department of Surgery and Liver Transplant Institute, Inonu University, Faculty of Medicine, 244280, Malatya, Turkey
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Adler M, Larocca L, Trovato FM, Marcinkowski H, Pasha Y, Taylor-Robinson SD. Evaluating the risk of hepatocellular carcinoma in patients with prominently elevated liver stiffness measurements by FibroScan: a multicentre study. HPB (Oxford) 2016; 18:678-83. [PMID: 27485062 DOI: 10.1016/j.hpb.2016.05.005] [Citation(s) in RCA: 16] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Revised: 05/10/2016] [Accepted: 05/13/2016] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS There are limited data on the significance of liver stiffness measurements (LSM) by transient elastography in the upper extreme end of the measurable spectrum. This multicentre retrospective observational study evaluated the risk of hepatocellular carcinoma (HCC) in patients with LSM ≥20 kPa. METHODS 432 cirrhosis patients with LSM ≥20 kPa between June 2007 and October 2015 were retrospectively followed-up through electronic records. RESULTS A minimum 1-year follow-up was available for 278 patients (177 men; average age 57, range 18-84). LSM ranged from 20.0 to 75.0 kPa (mean 34.6 kPa). Cumulative incidences of HCC were 19 (6.8%), 30 (10.8%) and 41 (14.7%) at 1, 2 and 3 years, respectively. HCC was associated with age (p = 0.003), higher LSM (p = 0.005) and viral aetiology (p = 0.007). Patients were divided into 4 groups based on LSM at entry: 20-25 kPa (n = 74); 25-30 kPa (n = 62); 30-40 kPa (n = 75); >40 kPa (n = 67). Compared to the 20-25 kPa group, the 30-40 kPa group had a hazard ratio (HR) of 3.0 (95% CI, 1.1-8.3; p = 0.037), and the >40 kPa group had a HR of 4.8 (95% CI, 1.7-13.4; p = 0.003). CONCLUSIONS This study shows an association between LSM at the upper extreme and HCC risk. Physicians may find this beneficial as a non-invasive dynamic approach to assessing HCC risk in cirrhosis patients.
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Key Words
- lsm, liver stiffness measurement
- kpa, kilopascal
- hcc, hepatocellular carcinoma
- cld, chronic liver disease
- ald, alcoholic liver disease
- nafld, non-alcoholic fatty liver disease
- hbv, hepatitis b virus
- hcv, hepatitis c virus
- hdv, hepatitis d virus
- iqr, interquartile range
- s, small
- m, medium
- xl, extra-large
- ci, confidence interval
- hr, hazard ratio
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Burbelo PD, Lebovitz EE, Notkins AL. Luciferase immunoprecipitation systems for measuring antibodies in autoimmune and infectious diseases. Transl Res 2015; 165:325-35. [PMID: 25241936 PMCID: PMC4306608 DOI: 10.1016/j.trsl.2014.08.006] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 08/26/2014] [Accepted: 08/26/2014] [Indexed: 12/22/2022]
Abstract
Antibody profiles have the potential to revolutionize personalized medicine by providing important information related to autoimmunity against self-proteins and exposure to infectious agents. One immunoassay technology, luciferase immunoprecipitation systems (LIPS), harnesses light-emitting recombinant proteins to generate robust, high-quality antibody data often spanning a large dynamic range of detection. Here, we describe the general format of LIPS and discuss studies using the technology to measure autoantibodies in several human autoimmune diseases including type 1 diabetes, Sjögren's syndrome, systemic lupus erythematosus, and immunodeficiencies secondary to anticytokine autoantibodies. We also describe the usefulness of evaluating antibodies against single or multiple antigens from infectious agents for diagnosis, pathogen discovery, and for obtaining individual exposure profiles. These diverse findings support the notion that the LIPS is a useful technology for generating antibody profiles for personalized diagnosis and monitoring of human health.
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Key Words
- ards, acute respiratory distress syndrome
- dntm, disseminated nontuberculous mycobacterial
- ebv, epstein-barr virus
- elisa, enzyme-linked immunoassay
- hcv, hepatitis c virus
- hiv, human immunodeficiency virus
- htlv, human t-lymphotropic virus
- il, interleukin
- kshv, kaposi sarcoma-associated herpes virus
- lips, luciferase immunoprecipitation systems
- mers, middle east respiratory virus
- nphv, nonprimate hepatitis c-like virus
- rip, radioimmunoprecipitation assay
- ruc, renilla luciferase
- sle, systemic lupus erythematosus
- ss, sjögren's syndrome
- t1d, type i diabetes
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Affiliation(s)
- Peter D Burbelo
- Dental Clinical Research Core, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD.
| | - Evan E Lebovitz
- Department of Perioperative Medicine, Clinical Center, National Institutes of Health, Bethesda, MD
| | - Abner L Notkins
- Experimental Medicine Section, Laboratory of Sensory Biology, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD
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Hoare M, Shankar A, Shah M, Rushbrook S, Gelson W, Davies S, Akbar A, Alexander GJ. γ-H2AX+CD8+ T lymphocytes cannot respond to IFN-α, IL-2 or IL-6 in chronic hepatitis C virus infection. J Hepatol 2013; 58:868-74. [PMID: 23257612 PMCID: PMC3625113 DOI: 10.1016/j.jhep.2012.12.009] [Citation(s) in RCA: 17] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 11/30/2012] [Accepted: 12/05/2012] [Indexed: 12/26/2022]
Abstract
BACKGROUND & AIMS Age is the dominant prognostic factor influencing the natural history of hepatitis C virus (HCV) infection and treatment response. Accelerated lymphocyte telomere shortening in HCV infection correlates with adverse clinical outcomes. Critical telomere shortening generates double-stranded DNA breaks (DSB) inducing the DNA damage response, leading to replicative senescence. The phenotype and function of CD8+ T lymphocytes and the in vitro response to IFN-α in relation to the DNA damage response were investigated in patients with chronic HCV infection. METHODS CD8+ T lymphocytes with DSB were identified by expression of γ-H2AX (Ser-139) in 134 HCV-exposed subjects and 27 controls. Telomere length was determined by flow-FISH; cytokine expression by intracellular cytokine staining; in vitro responses to IFN-α, IL-2 or IL-6 by phospho-STAT1 (Y701) or phospho-STAT5 (Y694) expression. RESULTS The proportion of circulating CD8+γ-H2AX+ T lymphocytes rose with increasing fibrosis stage (p=0.0023). CD8+γ-H2AX+ T lymphocytes were enriched in liver compared to blood (p=0.03). CD8+γ-H2AX+ T lymphocytes demonstrated increased IFN-γ (p=0.02) and reduced IL-2 expression (p=0.02). CD8+γ-H2AX+ T lymphocytes failed to phosphorylate STAT1 in response to IFN-α compared to unfractionated CD8+ T lymphocytes (p <0.0001). More widespread failure of Jak/Stat signalling in CD8+γ-H2AX+ T lymphocytes was suggested by impaired phosphorylation of STAT1 with IL-6 (p=0.002) and STAT5 with IL-2 (p=0.0039) compared to unfractionated CD8+ T-lymphocytes. CONCLUSIONS In chronic HCV infection, CD8+γ-H2AX+ T lymphocytes are highly differentiated with shortened telomeres, are more frequent within the liver, are associated with severe fibrosis and fail to activate Jak/Stat pathways in response to IFN-α, IL-2 or IL-6, perhaps explaining treatment failure in those with severe fibrosis.
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Affiliation(s)
- Matthew Hoare
- Department of Medicine, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Arun Shankar
- Department of Medicine, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Meera Shah
- Department of Medicine, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Simon Rushbrook
- Department of Medicine, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - William Gelson
- Department of Medicine, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Susan Davies
- Department of Pathology, University of Cambridge, Cambridge, UK
| | - Arne Akbar
- Department of Immunology, University College London, London, UK
| | - Graeme J.M. Alexander
- Department of Medicine, School of Clinical Medicine, University of Cambridge, Cambridge, UK,Corresponding author. Address: Department of Medicine, Box 157, Addenbrooke’s Hospital, Hills Road, Cambridge CB2 2QQ, UK. Tel.: +44 1223 336008; fax: +44 1223 216111.
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El-Kamary SS, Hashem M, Saleh DA, Abdelwahab SF, Sobhy M, Shebl FM, Shardell MD, Strickland GT, Shata MT. Hepatitis C virus-specific cell-mediated immune responses in children born to mothers infected with hepatitis C virus. J Pediatr 2013; 162:148-54. [PMID: 22883419 PMCID: PMC3526784 DOI: 10.1016/j.jpeds.2012.06.057] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 05/11/2012] [Accepted: 06/28/2012] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To investigate the association between hepatitis C virus (HCV)-specific cell-mediated immunity (CMI) responses and viral clearance in children born to mothers infected with HCV. STUDY DESIGN A cross-sectional study of children from a mother-infant cohort in Egypt were enrolled to detect CMI responses to recombinant core and nonstructural HCV antigens (nonstructural segments NS3, NS4a/b, and NS5 of the HCV genome) using an interferon-gamma enzyme-linked immunospot assay. Children born to mothers with chronic HCV were enrolled into 3 groups: transiently viremic (n = 5), aviremic (n = 36), and positive control (n = 6), which consisted of 1 child with chronic HCV from this cohort and another 5 children with chronic HCV from a companion study. Children without HCV born to mothers without HCV (n = 27) served as a negative control group. Wilcoxon rank sum test was used to compare the magnitude of CMI responses between groups. RESULTS None of the 6 control children who were positive for HCV responded to any HCV antigen, and 4 (80%) of 5 children with transient viremia responded to at least one HCV antigen, compared with 5 (14%) of 36 and 3 (11%) of 27 children in the aviremic and negative control groups, respectively. Children with transient viremia elicited stronger responses than did negative controls (P = .005), positive controls (P = .011), or children without HCV viremia (P = .012), particularly to nonstructural antigens. CONCLUSIONS HCV-specific CMI responses were significantly higher in magnitude and frequency among transiently infected children compared with those persistently infected. This suggests CMI responses may be associated with past viral clearance and can identify children at high risk of infection, who can be targeted for health education, screening, and follow-up.
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Key Words
- anti-hcv, antibodies to hepatitis c virus
- cmi, cell-mediated immunity
- elispot, enzyme-linked immunospot assay
- hcv, hepatitis c virus
- ifn-γ, interferon-gamma
- ns3/ns4, nonstructural segments ns3, ns4a, and ns4b of the hcv genome
- ns5, nonstructural segment ns5 of the hcv genome
- pbmc, peripheral blood mononuclear cell
- sfc, spot-forming cell
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Affiliation(s)
- Samer S El-Kamary
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
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Fontana JM, Alexander E, Salvatore M. Translational research in infectious disease: current paradigms and challenges ahead. Transl Res 2012; 159:430-53. [PMID: 22633095 DOI: 10.1016/j.trsl.2011.12.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 12/23/2011] [Accepted: 12/24/2012] [Indexed: 12/25/2022]
Abstract
In recent years, the biomedical community has witnessed a rapid scientific and technologic evolution after the development and refinement of high-throughput methodologies. Concurrently and consequentially, the scientific perspective has changed from the reductionist approach of meticulously analyzing the fine details of a single component of biology to the "holistic" approach of broadmindedly examining the globally interacting elements of biological systems. The emergence of this new way of thinking has brought about a scientific revolution in which genomics, proteomics, metabolomics, and other "omics" have become the predominant tools by which large amounts of data are amassed, analyzed, and applied to complex questions of biology that were previously unsolvable. This enormous transformation of basic science research and the ensuing plethora of promising data, especially in the realm of human health and disease, have unfortunately not been followed by a parallel increase in the clinical application of this information. On the contrary, the number of new potential drugs in development has been decreasing steadily, suggesting the existence of roadblocks that prevent the translation of promising research into medically relevant therapeutic or diagnostic application. In this article, we will review, in a noninclusive fashion, several recent scientific advancements in the field of translational research, with a specific focus on how they relate to infectious disease. We will also present a current picture of the limitations and challenges that exist for translational research, as well as ways that have been proposed by the National Institutes of Health to improve the state of this field.
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Key Words
- 2-de, 2-dimensional electrophoresis
- 2-d dige, 2-dimensional differential in-gel electrophoresis
- cf, cystic fibrosis
- ctsa, clinical and translational science awards program
- ebv, epstein-barr virus
- fda, u.s. food and drug administration
- gwas, genome-wide association studies
- hcv, hepatitis c virus
- hmp, human microbiome project
- hplc, high-pressure liquid chromatography
- lc, liquid chromatography
- lsb, laboratory of systems biology
- mab, monoclonal antibody
- mrm/srm, multiple reaction monitoring/selective reaction monitoring
- ms, mass spectrometry
- ms/ms, tandem mass spectrometry
- ncats, national center for advancing translational sciences
- ncrr, national center of research resources
- niaid, national institute of allergy and infectious disease
- nih, national institutes of health
- nme, new molecular entity
- nmr, nuclear magnetic resonance
- pbmc, peripheral blood mononuclear cell
- pcr, polymerase chain reaction
- prr, pathogen recognition receptor
- qqq, triple quadrupole mass spectrometry
- sars-cov, coronavirus associated with severe acute respiratory syndrome
- snp, single nucleotide polymorphism
- tb, tuberculosis
- uti, urinary tract infection
- yfv, yellow fever virus
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Knapp S, Warshow U, Ho KA, Hegazy D, Little A, Fowell A, Alexander G, Thursz M, Cramp M, Khakoo SI. A polymorphism in IL28B distinguishes exposed, uninfected individuals from spontaneous resolvers of HCV infection. Gastroenterology 2011; 141:320-5, 325.e1-2. [PMID: 21600205 PMCID: PMC3194089 DOI: 10.1053/j.gastro.2011.04.005] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Revised: 03/17/2011] [Accepted: 04/01/2011] [Indexed: 01/08/2023]
Abstract
BACKGROUND & AIMS Polymorphisms in the interleukin-28B (IL28B) gene are associated with outcomes from infection with hepatitis C virus (HCV). However, the role of these polymorphisms in protecting injection drug users who are at high risk for HCV infection but do not have detectable antibodies against HCV or HCV RNA (exposed uninfected) has not been demonstrated. We investigated whether these individuals have the IL28B genotype rs12979860-CC, which protects some individuals against HCV infection. METHODS Seventy-four exposed uninfected individuals, 89 spontaneous resolvers, and 234 chronically infected individuals were genotyped to determine single nucleotide polymorphisms at IL28B.rs12979860. RESULTS Exposed, uninfected individuals had a significantly lower frequency of the protective genotype (rs12979860-CC) than anti-HCV-positive spontaneous resolvers (41.9% vs 69.7%, respectively; P=.0005; odds ratio [OR], 0.31; 95% confidence interval [CI]: 0.16-0.60) but a similar frequency to patients who were chronically infected (41.9% vs 43.6%, respectively; P=ns). However, exposed, uninfected individuals had a significantly higher frequency of homozygosity for killer cell immunoglobulin-like receptor 2DL3:group 1 HLA-C (KIR2DL3:HLA-C1) than those with chronic infection (31.1% vs 13.3%, respectively; P=.0008; OR, 2.95; 95% CI: 1.59-5.49). For patients who spontaneously resolved infection, IL28B and KIR:HLA protected, independently, against chronic HCV infection, based on logistic regression and synergy analyses (synergy factor, 1.3; 95% CI: 0.37-4.75; P synergy=.6). CONCLUSIONS IL28B and KIR2DL3:HLA-C1 are independently associated with spontaneous resolution of viremia following HCV exposure. Resistance to HCV infection in exposed uninfected cases is associated with homozygosity for KIR2DL3:HLA-C1 but not the single nucleotide polymorphism IL28B.rs12979860. Uninfected individuals are therefore a distinct population from patients who spontaneously resolve HCV infection. Distinct, nonsynergistic innate immune mechanisms can determine outcomes of HCV exposure.
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Key Words
- killer cell immunoglobulin-like receptor
- genetics
- liver disease
- protective mechanisms
- eu, exposed but uninfected
- hcv, hepatitis c virus
- hencore, hepatitis c european network for cooperative research collaboration
- hla, human leukocyte antigen
- hla-c1, group 1 hla-c allotype
- idu, injection drug users
- ifn, interferon
- kir, killer cell immunoglobulin-like receptor
- nk, natural killer cells
- snp, single nucleotide polymorphism
- sr, spontaneous resolvers
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MESH Headings
- Adult
- Disease Progression
- Female
- Gene Frequency
- Genetic Predisposition to Disease
- HLA-C Antigens/genetics
- Hepacivirus/genetics
- Hepacivirus/immunology
- Hepatitis C/diagnosis
- Hepatitis C/genetics
- Hepatitis C/immunology
- Hepatitis C/prevention & control
- Hepatitis C Antibodies/blood
- Hepatitis C, Chronic/diagnosis
- Hepatitis C, Chronic/genetics
- Hepatitis C, Chronic/immunology
- Hepatitis C, Chronic/prevention & control
- Humans
- Immunity, Innate/genetics
- Interferons
- Interleukins/genetics
- Logistic Models
- Male
- Middle Aged
- Odds Ratio
- Phenotype
- Polymorphism, Single Nucleotide
- RNA, Viral/blood
- Receptors, KIR2DL3/genetics
- Remission, Spontaneous
- Risk Assessment
- Risk Factors
- Substance Abuse, Intravenous/complications
- United Kingdom
- Viral Load
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Affiliation(s)
- Susanne Knapp
- Department of Hepatology, Division of Medicine, Imperial College London, United Kingdom
| | - Usama Warshow
- Hepatology Research Group, Peninsula Medical School and South West Liver Unit, Derriford Hospital, Plymouth, United Kingdom
| | - K.M. Alexander Ho
- Department of Hepatology, Division of Medicine, Imperial College London, United Kingdom
| | - Doha Hegazy
- Hepatology Research Group, Peninsula Medical School and South West Liver Unit, Derriford Hospital, Plymouth, United Kingdom
| | - Ann–Margaret Little
- Laboratory of Histocompatibility and Immunogenetics, Gartnavel General Hospital, Glasgow, United Kingdom
| | - Andrew Fowell
- Department of Hepatology, Southampton General Hospital, Southampton, United Kingdom
| | - Graeme Alexander
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Mark Thursz
- Department of Hepatology, Division of Medicine, Imperial College London, United Kingdom
| | - Matthew Cramp
- Hepatology Research Group, Peninsula Medical School and South West Liver Unit, Derriford Hospital, Plymouth, United Kingdom
| | - Salim I. Khakoo
- Department of Hepatology, Division of Medicine, Imperial College London, United Kingdom
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Miknis ZJ, Magracheva E, Li W, Zdanov A, Kotenko SV, Wlodawer A. Crystal structure of human interferon-λ1 in complex with its high-affinity receptor interferon-λR1. J Mol Biol 2010; 404:650-64. [PMID: 20934432 PMCID: PMC2991516 DOI: 10.1016/j.jmb.2010.09.068] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 09/29/2010] [Accepted: 09/30/2010] [Indexed: 01/29/2023]
Abstract
Interferon (IFN)-λ1 [also known as interleukin (IL)-29] belongs to the recently discovered group of type III IFNs. All type III IFNs initiate signaling processes through formation of specific heterodimeric receptor complexes consisting of IFN-λR1 and IL-10R2. We have determined the structure of human IFN-λ1 complexed with human IFN-λR1, a receptor unique to type III IFNs. The overall structure of IFN-λ1 is topologically similar to the structure of IL-10 and other members of the IL-10 family of cytokines. IFN-λR1 consists of two distinct domains having fibronectin type III topology. The ligand-receptor interface includes helix A, loop AB, and helix F on the IFN site, as well as loops primarily from the N-terminal domain and inter-domain hinge region of IFN-λR1. Composition and architecture of the interface that includes only a few direct hydrogen bonds support an idea that long-range ionic interactions between ligand and receptor govern the process of initial recognition of the molecules while hydrophobic interactions finalize it.
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Key Words
- cytokine
- crystallography
- antiviral
- immunity
- signaling
- ifn, interferon
- il, interleukin
- hcv, hepatitis c virus
- cmv, cytomegalovirus
- ebv, epstein–barr virus
- peg, polyethylene glycol
- pdb, protein data bank
- nag, n-acetylglucosamine
- sc, shape complementarity
- snp, single nucleotide polymorphism
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Affiliation(s)
- Zachary J. Miknis
- Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, MD 21702, USA
| | - Eugenia Magracheva
- Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, MD 21702, USA
- Basic Research Program, SAIC-Frederick, Frederick, MD 21702, USA
| | - Wei Li
- Department of Biochemistry and Molecular Biology, University Hospital Cancer Center, UMDNJ-New Jersey Medical School, Newark, NJ 07103, USA
| | - Alexander Zdanov
- Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, MD 21702, USA
| | - Sergei V. Kotenko
- Department of Biochemistry and Molecular Biology, University Hospital Cancer Center, UMDNJ-New Jersey Medical School, Newark, NJ 07103, USA
| | - Alexander Wlodawer
- Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, MD 21702, USA
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Hoare M, Gelson WT, Das A, Fletcher JM, Davies SE, Curran MD, Vowler SL, Maini MK, Akbar AN, Alexander GJ. CD4+ T-lymphocyte telomere length is related to fibrosis stage, clinical outcome and treatment response in chronic hepatitis C virus infection. J Hepatol 2010; 53:252-60. [PMID: 20462651 PMCID: PMC2913243 DOI: 10.1016/j.jhep.2010.03.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Revised: 02/04/2010] [Accepted: 03/03/2010] [Indexed: 12/26/2022]
Abstract
BACKGROUND & AIMS Increasing age is associated with impaired immune function and in chronic HCV infection specifically, with progressive fibrosis, liver failure, HCC and impaired responses to antiviral therapy. T-lymphocyte telomere length declines with age. We hypothesised that shorter T-lymphocyte telomere length would be associated with poor clinical outcome in HCV infection. METHODS Circulating T-lymphocyte telomere length, an objective measure of immune senescence, was measured by flow-FISH in 135 HCV-RNA-positive, treatment-naïve patients and 41 healthy controls in relation to clinical outcome. RESULTS Shorter CD4+CD45RO+ T-lymphocyte telomeres were associated with severe fibrosis (p=0.003), independent of male sex (p=0.04), CMV positivity (p=0.003), previous HBV infection (p=0.007), and age (p=ns) in viraemic patients compared to controls. There were inverse correlations between CD4+CD45RO+ telomere length and fibrosis stage (p<0.001), portal tract inflammatory grade (p=0.035), prothrombin time (p<0.001) and bilirubin (p=0.001). One hundred and twenty-four viraemic individuals were followed prospectively to a composite endpoint of death, hepatic decompensation or HCC. Independent of age, those with shorter CD4+CD45RO+ telomeres were less likely to be complication free after 2-years than those with longer telomeres (86% versus 96%, p=0.009) with an age-adjusted hazard ratio of 0.93 (0.90-0.96). In addition, CD4+CD45RO+ telomere length predicted successful antiviral therapy (p=0.001) independent of other factors. CONCLUSIONS CD4+ T-lymphocyte telomere length, independent of age, was related to inflammatory grade, fibrosis stage, laboratory indices of severity, subsequent hepatic decompensation and treatment outcome in patients with chronic HCV infection.
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Key Words
- hcv, hepatitis c virus
- hcc, hepatocellular carcinoma
- cmv, cytomegalovirus
- hbv, hepatitis b virus
- ebv, epstein–barr virus
- hiv, human immunodeficiency virus
- ifn-α, interferon-α
- pbmcs, peripheral blood mononuclear cells
- apcs, antigen presenting cells
- hr, hazard ratio
- hepatitis c
- telomere
- t-lymphocyte
- immune senescence
- human
- ageing
- hepatocellular carcinoma
- outcome study
- interferon-α
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Affiliation(s)
- Matthew Hoare
- Department of Medicine, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - William T.H. Gelson
- Department of Medicine, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Abhi Das
- Department of Immunology, University College London, London, UK
| | | | - Susan E. Davies
- Department of Pathology, University of Cambridge, Cambridge, UK
| | - Martin D. Curran
- Clinical Microbiology and Public Health Laboratory, Health Protection Agency, Addenbrooke’s Hospital, Cambridge, UK
| | - Sarah L. Vowler
- Centre for Applied Medical Statistics, Department of Public Health and Primary Care, University of Cambridge, Institute of Public Health, Forvie Site, Robinson Way, Cambridge, UK
| | - Mala K. Maini
- Department of Immunology, University College London, London, UK
| | - Arne N. Akbar
- Department of Immunology, University College London, London, UK
| | - Graeme J.M. Alexander
- Department of Medicine, School of Clinical Medicine, University of Cambridge, Cambridge, UK,Corresponding author. Address: Department of Medicine, Box 157, Addenbrooke’s Hospital, Hills Road, Cambridge CB2 2QQ, UK. Tel.: +44 1223 336008; fax: +44 1223 216111.
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11
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Abstract
New methods to identify trace amount of infectious pathogens rapidly, accurately and with high sensitivity are in constant demand to prevent epidemics and loss of lives. Early detection of these pathogens to prevent, treat and contain the spread of infections is crucial. Therefore, there is a need and urgency for sensitive, specific, accurate, easy-to-use diagnostic tests. Versatile biofunctionalized engineered nanomaterials are proving to be promising in meeting these needs in diagnosing the pathogens in food, blood and clinical samples. The unique optical and magnetic properties of the nanoscale materials have been put to use for the diagnostics. In this review, we focus on the developments of the fluorescent nanoparticles, metallic nanostructures and superparamagnetic nanoparticles for bioimaging and detection of infectious microorganisms. The various nanodiagnostic assays developed to image, detect and capture infectious virus and bacteria in solutions, food or biological samples in vitro and in vivo are presented and their relevance to developing countries is discussed.
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Key Words
- who, world health organization
- elisa, enzyme linked immuno sorbent assay
- pcr, polymerase chain reaction
- nps, nanoparticles
- qdots, quantum dots
- rsv, respiratory syncytial virus
- fitc, fluorescein isothiocyanate
- zn-dpa, zn (ii)-dipicolylamine
- hbv, hepatitis b virus
- hcv, hepatitis c virus
- qdot-b, qdot-barcodes
- hiv, human immunodeficiency virus
- fsnps, fluorescent silica nanoparticles
- fret, förster resonance energy transfer
- fam-se, (5-carboxy-fluorescein succinimidyl ester)
- rox-se, (6-carboxy-x-rhodamine, succinimidyl ester)
- r6g-se, (5-carboxyrhodamine 6g, succinimidyl ester)
- tmr-se, (carboxytetramethylrhodamine, succinimidyl ester)
- osbpy, tris (2, 2′bipyridyl) osmium bis (hexafluorophosphate)
- rubpy, tris(bipyridine) ruthenium (ii) dichloride
- fnp-iifm, fluorescent nanoparticle-based indirect immunofluorescence microscopy
- eu iii, europium
- cadpa, calcium dipicolinate
- lod, limit of detection
- sec1, staphylococcal enterotoxin c1
- ct, cholera toxin
- pa, anthrax protective agent
- ccmv, cow pea chlorotic mottle virus
- mri, magnetic resonance imaging
- spa, protein a
- gd-dota, gadolinium-1,4,7,10-tetraazacyclododecane tetraacetic acid
- icp-ms, inductively coupled plasma mass spectrometry
- spr, surface plasmon resonance
- au np, gold nanoparticle
- hsv-2, herpes simplex virus type 2
- hsv-1, herpes simplex virus type 1
- rls, resonance light scattering
- ss, single stranded
- hrs, hyper-rayleigh scattering
- ds, double stranded
- tem, transmission electron microscopy
- h. pyroli, helicobacter pyroli
- sers, surface enhanced raman scattering
- smcc, succinimidyl-4-(n-maleimidomethyl)cyclohexane-1-carboxylate
- bg, bacillus globigii
- ova, ovalbumin
- cfu, colony forming unit
- atp, adenosine triphosphate
- ir, infra red
- squid, superconducting quantum interference device
- mnp, magnetic nanoparticles
- maldi-ms, matrix-assisted laser desorption/ionization mass spectrometry
- poa, adopted pigeon ovalbumin
- mgnp, magnetic glycol nanoparticles
- spio, superparamagnetic iron oxide
- mrs, magnetic relaxation sensors
- nmr, nuclear magnetic resonance
- fluorescent nanoparticles
- multiplexing
- viral imaging
- bacterial detection
- surface plasmon resonance
- colorimetric assay
- magnetic nanosensors
- immunomagnetic separation
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Affiliation(s)
- Padmavathy Tallury
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA
| | - Astha Malhotra
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA
| | - Logan M Byrne
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA
| | - Swadeshmukul Santra
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA
- Department of Chemistry, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA
- Biomolecular Science Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA
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12
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Agostoni A, Aygören-Pürsün E, Binkley KE, Blanch A, Bork K, Bouillet L, Bucher C, Castaldo AJ, Cicardi M, Davis AE, De Carolis C, Drouet C, Duponchel C, Farkas H, Fáy K, Fekete B, Fischer B, Fontana L, Füst G, Giacomelli R, Gröner A, Hack CE, Harmat G, Jakenfelds J, Juers M, Kalmár L, Kaposi PN, Karádi I, Kitzinger A, Kollár T, Kreuz W, Lakatos P, Longhurst HJ, Lopez-Trascasa M, Martinez-Saguer I, Monnier N, Nagy I, Németh E, Nielsen EW, Nuijens JH, O'grady C, Pappalardo E, Penna V, Perricone C, Perricone R, Rauch U, Roche O, Rusicke E, Späth PJ, Szendei G, Takács E, Tordai A, Truedsson L, Varga L, Visy B, Williams K, Zanichelli A, Zingale L. Hereditary and acquired angioedema: problems and progress: proceedings of the third C1 esterase inhibitor deficiency workshop and beyond. J Allergy Clin Immunol 2004; 114:S51-131. [PMID: 15356535 PMCID: PMC7119155 DOI: 10.1016/j.jaci.2004.06.047] [Citation(s) in RCA: 437] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2004] [Revised: 06/24/2004] [Accepted: 06/24/2004] [Indexed: 01/13/2023]
Abstract
Hereditary angioedema (HAE), a rare but life-threatening condition, manifests as acute attacks of facial, laryngeal, genital, or peripheral swelling or abdominal pain secondary to intra-abdominal edema. Resulting from mutations affecting C1 esterase inhibitor (C1-INH), inhibitor of the first complement system component, attacks are not histamine-mediated and do not respond to antihistamines or corticosteroids. Low awareness and resemblance to other disorders often delay diagnosis; despite availability of C1-INH replacement in some countries, no approved, safe acute attack therapy exists in the United States. The biennial C1 Esterase Inhibitor Deficiency Workshops resulted from a European initiative for better knowledge and treatment of HAE and related diseases. This supplement contains work presented at the third workshop and expanded content toward a definitive picture of angioedema in the absence of allergy. Most notably, it includes cumulative genetic investigations; multinational laboratory diagnosis recommendations; current pathogenesis hypotheses; suggested prophylaxis and acute attack treatment, including home treatment; future treatment options; and analysis of patient subpopulations, including pediatric patients and patients whose angioedema worsened during pregnancy or hormone administration. Causes and management of acquired angioedema and a new type of angioedema with normal C1-INH are also discussed. Collaborative patient and physician efforts, crucial in rare diseases, are emphasized. This supplement seeks to raise awareness and aid diagnosis of HAE, optimize treatment for all patients, and provide a platform for further research in this rare, partially understood disorder.
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Key Words
- aae
- acquired angioedema
- angioedema
- c1 esterase inhibitor
- c1-inh
- hae
- hane
- hano
- hereditary angioedema
- hereditary angioneurotic edema
- angioneurotic edema
- chemically induced angioedema
- human serping1 protein
- aae, acquired angioedema
- aaee, (italian) voluntary association for the study, therapy, and fight against hereditary angioedema
- ace, angiotensin-converting enzyme
- app, aminopeptidase p
- at2, angiotensin ii
- b19v, parvovirus b19
- bmd, bone mineral density
- bvdv, bovine viral diarrhea virus
- c1, first component of the complement cascade
- c1-inh, c1 esterase inhibitor
- c1nh, murine c1 esterase inhibitor gene
- c1nh, human c1 esterase inhibitor gene
- c2, second component of the complement cascade
- c3, third component of the complement cascade
- c4, fourth component of the complement cascade
- c5, fifth component of the complement cascade
- ccm, chemical cleavage of mismatches
- ch50, total hemolytic complement, 50% cell lysis
- cmax, maximum concentration
- cpmp, committee for proprietary medicinal products
- cpv, canine parvovirus
- dhplc, denaturing hplc
- ff, (ovarian) follicular fluid
- ffp, fresh frozen plasma
- hae, hereditary angioedema
- hae-i, hereditary angioedema type i
- hae-ii, hereditary angioedema type ii
- haea, us hae association
- hav, hepatitis a virus
- hbsag, hepatitis b surface antigen
- hbv, hepatitis b virus
- hcv, hepatitis c virus
- hk, high molecular weight kininogen
- hrt, hormone replacement therapy
- huvs, hypocomplementemic urticaria-vasculitis syndrome
- lh, luteinizing hormone
- masp, mannose-binding protein associated serine protease
- mbl, mannan-binding lectin
- mfo, multifollicular ovary
- mgus, monoclonal gammopathies of undetermined significance
- mr, molecular mass
- nat, nucleic acid amplification technique
- nep, neutral endopeptidase
- oc, oral contraceptive
- omim, online mendelian inheritance in man (database)
- pco, polycystic ovary
- pct, primary care trust
- prehaeat, novel methods for predicting, preventing, and treating attacks in patients with hereditary angioedema
- prv, pseudorabies virus
- rhc1-inh, recombinant human c1 esterase inhibitor
- rtpa, recombinant tissue-type plasminogen activator
- shbg, sex hormone binding globulin
- ssca, single-stranded conformational analysis
- tpa, tissue-type plasminogen activator
- uk, united kingdom
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13
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Abstract
BACKGROUND In the 1970s Manfred Eigen and colleagues proposed a new model of molecular evolution to explain adaptability and rapid evolution of simple replicons, as those that probably populated the earth at the onset of life. This model of evolution placed emphasis on mutant generation, to the point of invalidating the concept of wild-type genomes as a defined sequence of nucleotides. In striking similarity with the proposals for such early replicons, present-day RNA viruses consist of complex distributions of nonidentical but closely related genomes termed quasispecies. OBJECTIVES To discuss indeterminations inherent to a quasispecies structure and to the analytical procedures to define it, biological implications of quasispecies, and the need to take into account this type of population structure, in order to design effective strategies to prevent and control diseases caused by highly variable viruses. RESULTS Quasispecies have many biological implications, extending from viral pathogenesis to the emergence of new pathogens, rapid antigenic variation, and alterations in cell tropism, virulence, host range and viral gene expression. CONCLUSIONS Diseases caused by highly variable RNA viruses prove very difficult to control and vaccine development against such viruses are largely unsuccessful. It is important to understand quasispecies composition and dynamics, as quasispecies are an important step in the natural history of RNA viruses.
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Affiliation(s)
- E Domingo
- Centro de Biologia Molecular Severo Ochoa, Consejo Superior de Investigaciones Cientificas, Universidad Autonoma de Madrid, Cantoblanco, Spain.
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