1
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Düchs MJ, Kratzer RF, Vieyra-Garcia P, Strobel B, Schönberger T, Groß P, Aljayyoussi G, Gupta A, Lang I, Klein H, Morilla SM, Hopf S, Park J, Kreuz S, Klugmann M, Igney FH. Riboswitch-controlled IL-12 gene therapy reduces hepatocellular cancer in mice. Front Immunol 2024; 15:1360063. [PMID: 38558809 PMCID: PMC10979303 DOI: 10.3389/fimmu.2024.1360063] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 02/14/2024] [Indexed: 04/04/2024] Open
Abstract
Hepatocellular carcinoma (HCC) and solid cancers with liver metastases are indications with high unmet medical need. Interleukin-12 (IL-12) is a proinflammatory cytokine with substantial anti-tumor properties, but its therapeutic potential has not been realized due to severe toxicity. Here, we show that orthotopic liver tumors in mice can be treated by targeting hepatocytes via systemic delivery of adeno-associated virus (AAV) vectors carrying the murine IL-12 gene. Controlled cytokine production was achieved in vivo by using the tetracycline-inducible K19 riboswitch. AAV-mediated expression of IL-12 led to STAT4 phosphorylation, interferon-γ (IFNγ) production, infiltration of T cells and, ultimately, tumor regression. By detailed analyses of efficacy and tolerability in healthy and tumor-bearing animals, we could define a safe and efficacious vector dose. As a potential clinical candidate, we characterized vectors carrying the human IL-12 (huIL-12) gene. In mice, bioactive human IL-12 was expressed in a vector dose-dependent manner and could be induced by tetracycline, suggesting tissue-specific AAV vectors with riboswitch-controlled expression of highly potent proinflammatory cytokines as an attractive approach for vector-based cancer immunotherapy.
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Affiliation(s)
- Matthias J. Düchs
- Research Beyond Borders, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - Ramona F. Kratzer
- Cancer Immunology and Immune Modulation, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - Pablo Vieyra-Garcia
- Cancer Immunology and Immune Modulation, Boehringer Ingelheim RCV GmbH & Co. KG, Vienna, Austria
| | - Benjamin Strobel
- Drug Discovery Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - Tanja Schönberger
- Drug Discovery Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - Peter Groß
- Drug Discovery Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - Ghaith Aljayyoussi
- Drug Discovery Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - Aradhana Gupta
- Nonclinical Drug Safety, Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, CT, United States
| | - Isabel Lang
- Research Beyond Borders, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - Holger Klein
- Global Computational Biology and Digital Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - Sandra Martinez Morilla
- Cancer Immunology and Immune Modulation, Boehringer Ingelheim RCV GmbH & Co. KG, Ridgefield, CT, United States
| | - Stefan Hopf
- Cancer Immunology and Immune Modulation, Boehringer Ingelheim RCV GmbH & Co. KG, Vienna, Austria
| | - John Park
- Cancer Immunology and Immune Modulation, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - Sebastian Kreuz
- Research Beyond Borders, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - Matthias Klugmann
- Research Beyond Borders, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - Frederik H. Igney
- Cancer Immunology and Immune Modulation, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
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2
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Ayalon L, Mannheim I, Hopf S, Casal-Sanchez L, Kydd A. Ageism: An Old Concept From New Perspectives. J Appl Gerontol 2023; 42:1176-1178. [PMID: 37204258 DOI: 10.1177/07334648231165352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023] Open
Affiliation(s)
- Liat Ayalon
- Louis and Gabi Weisfeld School of Social Work, Bar Ilan University, Israel
| | - Ittay Mannheim
- Tranzo, Tilburg School of Social and Behavioral Sciences, Tilburg University, Netherlands
- School for Allied Health Professions, Fontys University of Applied Science, Netherlands
| | - Stefan Hopf
- Irish Centre for Social Gerontology, University of Galway, Ireland
- Vienna Centre for Societal Security, Vienna, Austria
| | | | - Angela Kydd
- School of Nursing, Midwifery and Paramedic Practice, Robert Gordon University, UK
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3
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Kofink C, Trainor N, Mair B, Wöhrle S, Wurm M, Mischerikow N, Roy MJ, Bader G, Greb P, Garavel G, Diers E, McLennan R, Whitworth C, Vetma V, Rumpel K, Scharnweber M, Fuchs JE, Gerstberger T, Cui Y, Gremel G, Chetta P, Hopf S, Budano N, Rinnenthal J, Gmaschitz G, Mayer M, Koegl M, Ciulli A, Weinstabl H, Farnaby W. A selective and orally bioavailable VHL-recruiting PROTAC achieves SMARCA2 degradation in vivo. Nat Commun 2022; 13:5969. [PMID: 36216795 PMCID: PMC9551036 DOI: 10.1038/s41467-022-33430-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 09/15/2022] [Indexed: 11/09/2022] Open
Abstract
Targeted protein degradation offers an alternative modality to classical inhibition and holds the promise of addressing previously undruggable targets to provide novel therapeutic options for patients. Heterobifunctional molecules co-recruit a target protein and an E3 ligase, resulting in ubiquitylation and proteosome-dependent degradation of the target. In the clinic, the oral route of administration is the option of choice but has only been achieved so far by CRBN- recruiting bifunctional degrader molecules. We aimed to achieve orally bioavailable molecules that selectively degrade the BAF Chromatin Remodelling complex ATPase SMARCA2 over its closely related paralogue SMARCA4, to allow in vivo evaluation of the synthetic lethality concept of SMARCA2 dependency in SMARCA4-deficient cancers. Here we outline structure- and property-guided approaches that led to orally bioavailable VHL-recruiting degraders. Our tool compound, ACBI2, shows selective degradation of SMARCA2 over SMARCA4 in ex vivo human whole blood assays and in vivo efficacy in SMARCA4-deficient cancer models. This study demonstrates the feasibility for broadening the E3 ligase and physicochemical space that can be utilised for achieving oral efficacy with bifunctional molecules. Protein degraders are an emerging drug modality; however, their properties lie beyond typical drug-like space. Here the authors report optimisation via structure-based exit vector and linker design towards the VHL-recruiting PROTAC ACBI2, an orally bioavailable and selective degrader of SMARCA2.
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Affiliation(s)
| | - Nicole Trainor
- Centre for Targeted Protein Degradation, School of Life Sciences, University of Dundee, Dundee, UK.,ACRF Chemical Biology Division, Walter and Eliza Hall Institute, Parkville, VIC, Australia
| | - Barbara Mair
- Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria
| | - Simon Wöhrle
- Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria
| | - Melanie Wurm
- Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria
| | | | - Michael J Roy
- Centre for Targeted Protein Degradation, School of Life Sciences, University of Dundee, Dundee, UK.,ACRF Chemical Biology Division, Walter and Eliza Hall Institute, Parkville, VIC, Australia
| | - Gerd Bader
- Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria
| | - Peter Greb
- Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria
| | | | - Emelyne Diers
- Centre for Targeted Protein Degradation, School of Life Sciences, University of Dundee, Dundee, UK
| | - Ross McLennan
- Centre for Targeted Protein Degradation, School of Life Sciences, University of Dundee, Dundee, UK
| | - Claire Whitworth
- Centre for Targeted Protein Degradation, School of Life Sciences, University of Dundee, Dundee, UK
| | - Vesna Vetma
- Centre for Targeted Protein Degradation, School of Life Sciences, University of Dundee, Dundee, UK
| | - Klaus Rumpel
- Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria
| | | | | | | | - Yunhai Cui
- Boehringer Ingelheim Pharma GmbH & Co KG, Biberach, Germany
| | | | - Paolo Chetta
- Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria
| | - Stefan Hopf
- Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria
| | - Nicole Budano
- Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria
| | | | | | - Moriz Mayer
- Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria
| | - Manfred Koegl
- Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria
| | - Alessio Ciulli
- Centre for Targeted Protein Degradation, School of Life Sciences, University of Dundee, Dundee, UK
| | | | - William Farnaby
- Centre for Targeted Protein Degradation, School of Life Sciences, University of Dundee, Dundee, UK.
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4
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Hopf S, Walsh K, Flynn E, Georgantzi N. The Relationship between Ageism and Well-Being as Mediated through COVID-19-Related Experiences and Discourses. Int J Environ Res Public Health 2021; 18:ijerph181910490. [PMID: 34639790 PMCID: PMC8508530 DOI: 10.3390/ijerph181910490] [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] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/26/2021] [Accepted: 09/29/2021] [Indexed: 11/16/2022]
Abstract
Both COVID-19 and ageism can have a negative impact on the well-being of older people. Yet, our knowledge on the links between COVID-19, ageism and well-being is still emerging. The present study aimed to contribute to this knowledge by exploring the lived experiences of older adults during the COVID-19 pandemic. To do so, we analyzed older persons' subjective experiences and perceptions of ageism arising from COVID-19-related policies and discourses in two country contexts-Austria and Ireland-and the implications of these experiences for personal well-being. Based on the thematic analysis of 27 interviews with older adults, we found that participants perceived and encountered a discriminatory homogeneous representation of older people as a group. Three specific forms of this homogenization, namely stigmatization, paternalism, and scapegoating, were identified as impact on well-being. Moreover, our analysis showed how these forms of ageism challenge both the individual and social identities of older people, revealing older participants' different attitudes in responding to this challenge. With reference to the international research literature, we discussed the impact of these experiences on the well-being of older people and the possible legal and socio-political implications of our findings.
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Affiliation(s)
- Stefan Hopf
- Irish Centre for Social Gerontology, Institute for Lifecourse and Society, National University of Ireland Galway, H91 TK33 Galway, Ireland; (K.W.); (N.G.)
- Centre for Disability Law and Policy, Institute for Lifecourse and Society, National University of Ireland Galway, H91 TK33 Galway, Ireland;
- AGE Platform Europe, 1150 Brussels, Belgium
- Correspondence:
| | - Kieran Walsh
- Irish Centre for Social Gerontology, Institute for Lifecourse and Society, National University of Ireland Galway, H91 TK33 Galway, Ireland; (K.W.); (N.G.)
| | - Eilionóir Flynn
- Centre for Disability Law and Policy, Institute for Lifecourse and Society, National University of Ireland Galway, H91 TK33 Galway, Ireland;
| | - Nena Georgantzi
- Irish Centre for Social Gerontology, Institute for Lifecourse and Society, National University of Ireland Galway, H91 TK33 Galway, Ireland; (K.W.); (N.G.)
- AGE Platform Europe, 1150 Brussels, Belgium
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5
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Hopf S. The Social Patterns of Age Discrimination: An Analysis of the Macro-Perspective-Interpretations. Innov Aging 2020. [PMCID: PMC7741662 DOI: 10.1093/geroni/igaa057.1049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Modern societies can be regarded as service economies, consequently accessing services is an essential part of social and economic participation. Direct and indirect indiscrimination act as barriers to accessing and using services and one way to address these barriers is to implement anti-discrimination legislation and policy. From a sociological point of view, such policies and legal frameworks can be described as elements of the social discourse in these areas. These texts, along with their implicit and explicit interpretations of the problem, represent the official and legitimised stake of the socially available stock of knowledge of what constitutes age discrimination. Hence the shape and contribute to the general understanding of age discrimination. The study aims to investigate the interpretation patterns offered by the “supply” side, that is by those actors who in their work refer to but also (re-) shape and disseminate the problem interpretation contained in the official texts. To address this aim, focus groups with stakeholders and semi-structured interviews with legal and policy experts were conducted in Austria and Ireland. The findings highlight that experts and stakeholders’ definitions of age discrimination usually extend past legal and policy concepts. The expert and stakeholder approaches differ in their starting points for describing the problem, ranging from vulnerability considerations to human rights-based concepts and more structurally orientated needs-based criteria. Finally, the analysis also reveals a central distinguishing feature of age discrimination, namely the “de-temporalization” and “de-historicization” of the person, which is of equal importance as the de-individualization as a consequence of stereotyping
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Affiliation(s)
- Stefan Hopf
- National University of Ireland Galway, Galway, Ireland
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6
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Hopf S, Previtali F, Georgantzi N. Human Rights in Older Age: A Critical Reflection of the Debate Around a UN Convention on the Rights of Older Persons. Innov Aging 2020. [PMCID: PMC7741571 DOI: 10.1093/geroni/igaa057.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In recent years ageism has received increase international attention. In 2016 the UN dedicated the International Day of Older Persons to the fight against ageism and the World Heath Organization launched a campaign to combat ageism. This growing interest is also illustrated by the establishment of the UN Open-Ended Working Group on Ageing, and the related work on a UN convention on the rights of older persons, which, among other things, aims to provide better protection against discrimination. The ongoing discussions about a convention is accompanied by tensions between views assuming an older persons’ specific convention may reproduce age-related group differences and could perpetuate ageism, and those who argue that it will help reducing it. This article critically reflects on these discussions and some aspects of a potential convention that could provide basis for ageism critique. We refer to central sociological and legal arguments of the debate around ageism and age-based distinctions, which show clear intersections, e.g. the legal discussion one the justifiability of the general use of "age limits" and the socio-scientific debate on the relationship between age categorization and ageism. These intersections serve as central starting point for the question whether and to what extent age group differentiation and targeted human rights protection may (re-)produce ageism. Finally, we argue in favor of re-framing the debate about a convention on the rights of older persons towards a more universalist approach, which addresses possible age inequalities and critically reflects on the connection between chronological age and targeted human rights provisions.
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Affiliation(s)
- Stefan Hopf
- National University of Ireland Galway, Galway, Ireland
| | | | - Nena Georgantzi
- Age Platform Europe, Brussels, Brussels Hoofdstedelijk Gewest, Belgium
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7
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Weijler AM, Mucha J, Farkas AM, Baranyi U, Pilat N, Cho A, Muckenhuber M, Hopf S, Wahrmann M, Linhart B, Valenta R, Wekerle T. Methods to Detect MHC-Specific IgE in Mice and Men. Front Immunol 2020; 11:586856. [PMID: 33363535 PMCID: PMC7753192 DOI: 10.3389/fimmu.2020.586856] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 10/27/2020] [Indexed: 12/24/2022] Open
Abstract
Humoral immunity is a major barrier limiting long-term outcome after organ transplantation. Especially, the production of antibodies directed against donor HLA/MHC antigens (i.e. donor-specific antibodies (DSA)) leading to antibody-mediated rejection (ABMR) is considered to be a major factor negatively affecting allograft survival. DSAs of the IgG isotype are routinely measured in transplant patients. However, not all patients diagnosed with IgG-DSA develop ABMR events. Therefore, research in better understanding the mechanisms of ABMR is of great importance. We recently demonstrated the production of MHC-specific IgE upon allograft rejection in mice and in transplant patients. IgE is classically connected with allergy and is known to be important for the humoral defense against helminths and worms. However, its role in autoimmune diseases and cancer has been reported recently as well. The concentration of IgE in blood is extremely low compared to other antibody isotypes. Therefore, detection of MHC-specific IgE from serum requires methods of high sensitivity. Since MHC-specific IgG-typically present at much higher serum levels-develops as well, high specificity is also required of IgE detection methods. In the murine model we developed an enzyme linked immunosorbent assay (ELISA) using MHC monomers for measurement of MHC-specific IgE, allowing us to distinguish between specificities of antibodies against different class I and class II antigens. For measurement of functional activity of MHC-specific IgE in vitro, a release assay using a rat basophil cell line (RBL-2H3) was established. For functional analysis of MHC-specific IgE in vivo, a cutaneous hypersensitivity reaction assay was adapted for this purpose using MHC monomers. Humanized RBL-2H3 cells transfected with cDNA coding for the human-high affinity IgE receptor were used for functionality measurement of donor-specific IgE in sensitized transplant patients. For detection of HLA-specific IgE, a bead assay was adapted, using beads expressing single HLA antigens. The aim of this publication is to demonstrate currently established methods for the detection and characterization of MHC-specific IgE in the murine and human setting.
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Affiliation(s)
- Anna Marianne Weijler
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Jasmin Mucha
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Andreas Michael Farkas
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Ulrike Baranyi
- Cardiac Surgery Research Laboratory, Division of Cardiac Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Nina Pilat
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Ara Cho
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria.,Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Moritz Muckenhuber
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Stefan Hopf
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Markus Wahrmann
- Division of Nephrology and Dialysis, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Birgit Linhart
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Rudolf Valenta
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria.,NRC Institute of Immunology FMBA of Russia, Moscow, Russia.,Laboratory for Immunopathology, Department of Clinical Immunology and Allergy, Sechenov First Moscow State Medical University, Moscow, Russia.,Karl Landsteiner University of Health Sciences, Krems, Austria
| | - Thomas Wekerle
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
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8
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Farkas AM, Baranyi U, Böhmig GA, Unger L, Hopf S, Wahrmann M, Regele H, Mahr B, Schwarz C, Hock K, Pilat N, Kristo I, Mraz J, Lupinek C, Thalhamer J, Bond G, Kuessel L, Wlodek E, Martin J, Clatworthy M, Pettigrew G, Valenta R, Wekerle T. Allograft rejection is associated with development of functional IgE specific for donor MHC antigens. J Allergy Clin Immunol 2019; 143:335-345.e12. [PMID: 30009843 DOI: 10.1016/j.jaci.2018.06.034] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 06/07/2018] [Accepted: 06/14/2018] [Indexed: 12/21/2022]
Abstract
BACKGROUND Donor-specific antibodies of the IgG isotype are measured routinely for diagnostic purposes in renal transplant recipients and are associated with antibody-mediated rejection and long-term graft loss. OBJECTIVE This study aimed to investigate whether MHC-specific antibodies of the IgE isotype are induced during allograft rejection. METHODS Anti-MHC/HLA IgE levels were measured in sera of mice grafted with skin or heart transplants from various donor strains and in sera of kidney transplant patients with high levels of HLA IgG. Mediator release was triggered in vitro by stimulating basophils that were coated with murine or human IgE-positive serum, respectively, with specific recombinant MHC/HLA antigens. Kidney tissue samples obtained from organ donors were analyzed by using flow cytometry for cells expressing the high-affinity receptor for IgE (FcεRI). RESULTS Donor MHC class I- and MHC class II-specific IgE was found on acute rejection of skin and heart grafts in several murine strain combinations, as well as during chronic antibody-mediated heart graft rejection. Anti-HLA IgE, including donor HLA class I and II specificities, was identified in a group of sensitized transplant recipients. Murine and human anti-MHC/HLA IgE triggered mediator release in coated basophils on stimulation with specific MHC/HLA antigens. HLA-specific IgE was not linked to atopy, and allergen-specific IgE present in allergic patients did not cross-react with HLA antigens. FcεRI+ cells were found in the human renal cortex and medulla and provide targets for HLA-specific IgE. CONCLUSION These results demonstrate that MHC/HLA-specific IgE develops during an alloresponse and is functional in mediating effector mechanisms.
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Affiliation(s)
- Andreas M Farkas
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Ulrike Baranyi
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria; Cardiac Surgery Laboratory, Medical University of Vienna, Vienna, Austria
| | - Georg A Böhmig
- Division of Nephrology and Dialysis, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Lukas Unger
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Stefan Hopf
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Markus Wahrmann
- Division of Nephrology and Dialysis, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Heinz Regele
- Institute of Clinical Pathology, Medical University of Vienna, Vienna, Austria
| | - Benedikt Mahr
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Christoph Schwarz
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Karin Hock
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Nina Pilat
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Ivan Kristo
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Jasmin Mraz
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - Christian Lupinek
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center of Physiology and Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Josef Thalhamer
- Department of Molecular Biology, University of Salzburg, Salzburg, Austria
| | - Gregor Bond
- Division of Nephrology and Dialysis, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Lorenz Kuessel
- Department for Obstetrics and Gynecology, Medical University of Vienna, Vienna, Austria
| | - Elizabeth Wlodek
- Department of Surgery, University of Cambridge, Cambridge, United Kingdom
| | - Jack Martin
- Department of Surgery, University of Cambridge, Cambridge, United Kingdom
| | - Menna Clatworthy
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Gavin Pettigrew
- Department of Surgery, University of Cambridge, Cambridge, United Kingdom
| | - Rudolf Valenta
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center of Physiology and Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Thomas Wekerle
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, Vienna, Austria.
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9
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Grensemann J, Eichler L, Hopf S, Jarczak D, Simon M, Kluge S. Feasibility of an endotracheal tube-mounted camera for percutaneous dilatational tracheostomy. Acta Anaesthesiol Scand 2017; 61:660-667. [PMID: 28493334 DOI: 10.1111/aas.12904] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 03/08/2017] [Accepted: 04/13/2017] [Indexed: 11/27/2022]
Abstract
BACKGROUND Percutaneous dilatational tracheostomy (PDT) in critically ill patients is often led by optical guidance with a bronchoscope. This is not without its disadvantages. Therefore, we aimed to study the feasibility of a recently introduced endotracheal tube-mounted camera (VivaSight™-SL, ET View, Misgav, Israel) in the guidance of PDT. METHODS We studied 10 critically ill patients who received PDT with a VivaSight-SL tube that was inserted prior to tracheostomy for optical guidance. Visualization of the tracheal structures (i.e., identification and monitoring of the thyroid, cricoid, and tracheal cartilage and the posterior wall) and the quality of ventilation (before puncture and during the tracheostomy) were rated on four-point Likert scales. Respiratory variables were recorded, and blood gases were sampled before the interventions, before the puncture and before the insertion of the tracheal cannula. RESULTS Visualization of the tracheal landmarks was rated as 'very good' or 'good' in all but one case. Monitoring during the puncture and dilatation was also rated as 'very good' or 'good' in all but one. In the cases that were rated 'difficult', the visualization and monitoring of the posterior wall of the trachea were the main concerns. No changes in the respiratory variables or blood gases occurred between the puncture and the insertion of the tracheal cannula. CONCLUSION Percutaneous dilatational tracheostomy with optical guidance from a tube-mounted camera is feasible. Further studies comparing the camera tube with bronchoscopy as the standard approach should be performed.
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Affiliation(s)
- J. Grensemann
- Department of Intensive Care Medicine; University Medical Center Hamburg-Eppendorf; Hamburg Germany
| | - L. Eichler
- Department of Intensive Care Medicine; University Medical Center Hamburg-Eppendorf; Hamburg Germany
| | - S. Hopf
- Department of Intensive Care Medicine; University Medical Center Hamburg-Eppendorf; Hamburg Germany
| | - D. Jarczak
- Department of Intensive Care Medicine; University Medical Center Hamburg-Eppendorf; Hamburg Germany
| | - M. Simon
- Department of Respiratory Medicine; University Medical Center Hamburg-Eppendorf; Hamburg Germany
| | - S. Kluge
- Department of Intensive Care Medicine; University Medical Center Hamburg-Eppendorf; Hamburg Germany
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10
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Hopf S, Grensemann J, Eichler L, Jarczak D, Simon M, Kluge S. Machbarkeitsstudie der optischen Kontrolle bei der perkutanen Dilatationstracheotomie mittels VivaSight™-SL-Tubes. Pneumologie 2017. [DOI: 10.1055/s-0037-1598430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- S Hopf
- Klinik für Intensivmedizin, Universitätsklinikum Hamburg-Eppendorf
| | - J Grensemann
- Klinik für Intensivmedizin, Universitätsklinikum Hamburg-Eppendorf
| | - L Eichler
- Klinik für Intensivmedizin, Universitätsklinikum Hamburg-Eppendorf
| | - D Jarczak
- Klinik für Intensivmedizin, Universitätsklinikum Hamburg-Eppendorf
| | - M Simon
- II. Medizinische Klinik, Sektion Pneumologie, Universitätsklinikum Hamburg-Eppendorf
| | - S Kluge
- Klinik für Intensivmedizin, Universitätsklinikum Hamburg-Eppendorf
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Puck A, Hopf S, Modak M, Majdic O, Cejka P, Blüml S, Schmetterer K, Arnold-Schrauf C, Gerwien JG, Frederiksen KS, Thell E, Leitner J, Steinberger P, Aigner R, Seyerl-Jiresch M, Zlabinger GJ, Stöckl J. The soluble cytoplasmic tail of CD45 (ct-CD45) in human plasma contributes to keep T cells in a quiescent state. Eur J Immunol 2016; 47:193-205. [PMID: 27718235 PMCID: PMC5244668 DOI: 10.1002/eji.201646405] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 03/10/2016] [Revised: 08/23/2016] [Accepted: 10/05/2016] [Indexed: 01/22/2023]
Abstract
The cytoplasmic tail of CD45 (ct‐CD45) is proteolytically cleaved and released upon activation of human phagocytes. It acts on T cells as an inhibitory, cytokine‐like factor in vitro. Here, we show that ct‐CD45 is abundant in human peripheral blood plasma from healthy adults compared with plasma derived from umbilical cord blood and plasma from patients with rheumatoid arthritis or systemic lupus erythematosus. Plasma depleted of ct‐CD45 enhanced T‐cell proliferation, while addition of exogenous ct‐CD45 protein inhibited proliferation and reduced cytokine production of human T lymphocytes in response to TCR signaling. Inhibition of T‐cell proliferation by ct‐CD45 was overcome by costimulation via CD28. T‐cell activation in the presence of ct‐CD45 was associated with an upregulation of the quiescence factors Schlafen family member 12 (SLFN12) and Krueppel‐like factor 2 (KLF2) as well as of the cyclin‐dependent kinase (CDK) inhibitor p27kip1. In contrast, positive regulators of the cell cycle such as cyclin D2 and D3 as well as CDK2 and CDK4 were found to be downregulated in response to ct‐CD45. In summary, we demonstrate that ct‐CD45 is present in human plasma and sets the threshold of T‐cell activation.
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Affiliation(s)
- Alexander Puck
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Stefan Hopf
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Madhura Modak
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Otto Majdic
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Petra Cejka
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Stephan Blüml
- Department for Rheumatology, Medical University of Vienna, Vienna, Austria
| | - Klaus Schmetterer
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Catharina Arnold-Schrauf
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Jens G Gerwien
- Novo Nordisk A/S, Biopharmaceuticals Research Unit, Måløv, Denmark
| | | | - Elisabeth Thell
- Department for Gynecology, St. Josef Hospital, Vienna, Austria
| | - Judith Leitner
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Peter Steinberger
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Regina Aigner
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Maria Seyerl-Jiresch
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Gerhard J Zlabinger
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Johannes Stöckl
- Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
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Hopf S, Herzog M, Ploog D. Development of Attachment and Exploratory Behavior in Infant Squirrel Monkeys under Controlled Rearing Conditions. International Journal of Behavioral Development 2016. [DOI: 10.1177/016502548500800105] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study contributes to the understanding of early development of communication in squirrel monkeys (Saimiri). Emission of expressive behavior as well as its perception (as concluded from the partner's responses) form the basis of social communication. We studied stimulus conditions that control attachment and exploratory behavior two interdependent fields of motivation which are especially important in the early stages of development. Newborn squirrel monkeys were isolated from their mothers and the group and were provided with a mother surrogate, manipulanda, and social surrogate stimuli: objects were so designed as to elicit behavior which would otherwise be directed at conspecifics. It was found that the animals displayed largely normal attachment and exploratory behavior. They modified their behavior depending on whether their contacts with the social surrogate were answered by aversive or non-aversive calls in the same sense as socially experienced conspecifics would do. Consequently, the conclusion may be drawn that specific genetic components are involved in comprehending emotional expressions.
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Affiliation(s)
| | | | - D. Ploog
- Max-Planck Institute for Psychiatry, FRG
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Hopf S, Garner-Spitzer E, Hofer M, Kundi M, Wiedermann U. Comparable immune responsiveness but increased reactogenicity after subcutaneous versus intramuscular administration of tick borne encephalitis (TBE) vaccine. Vaccine 2016; 34:2027-34. [PMID: 26768126 DOI: 10.1016/j.vaccine.2015.12.057] [Citation(s) in RCA: 12] [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: 08/19/2015] [Revised: 11/26/2015] [Accepted: 12/22/2015] [Indexed: 01/24/2023]
Abstract
Evaluation of safety, immunogenicity and efficacy of vaccines during licensing studies is performed in relation to the selected vaccination route. For most adjuvanted vaccines, such as the TBE vaccine FSME-IMMUN, only intramuscular (i.m.) administration is licensed. Yet in certain situations, either because of medical indications, accidental application or due to a lack of sufficient muscular tissue, the vaccine might rather be applied subcutaneously (s.c.). With respect to the TBE vaccine there are currently however no data to support the use of the subcutaneous route of vaccination. In order to compare the reactogenicity and immune responsiveness upon i.m. and s.c. TBE vaccination 116 (58 females and 58 males) participants with a documented primary TBE vaccination course were randomized to receive either an i.m. or s.c. booster. Venous blood was collected before, 7 days, 1 month and 6 months after vaccination to determine antibody titer profiles. PBMC were isolated prior to and 7 days after booster to analyze lymphocyte subpopulations and cytokine production upon antigen restimulation. Subjects were monitored for the occurrence of side effects for 7 days post vaccination. Comparable levels of TBE specific neutralizing antibodies were induced after s.c. and i.m. vaccination. At the cellular level, IL-2, IFN gamma and IL-10 levels did not significantly differ using either route of vaccination and the distribution of T cell subsets was comparable along with a relative decrease of regulatory T-cells after both ways of administration. In contrast to the immunogenicity analyses, the data from safety diaries revealed a significantly higher rate of local, but not of systemic reactions after s.c. administration. In conclusion, this study demonstrates that both routes lead to comparable immune responses to the TBE antigen. The higher rate and intensity of local reactions, particularly among women, after s.c. vaccination however needs to be addressed during counseling.
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Affiliation(s)
- Stefan Hopf
- Institute of Specific Prophylaxis and Tropical Medicine, Medical University of Vienna, Vienna, Austria
| | - Erika Garner-Spitzer
- Institute of Specific Prophylaxis and Tropical Medicine, Medical University of Vienna, Vienna, Austria
| | - Michael Hofer
- Institute of Specific Prophylaxis and Tropical Medicine, Medical University of Vienna, Vienna, Austria
| | - Michael Kundi
- Institute of Environmental Health, Medical University of Vienna, Vienna, Austria
| | - Ursula Wiedermann
- Institute of Specific Prophylaxis and Tropical Medicine, Medical University of Vienna, Vienna, Austria.
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Bleich A, Hopf S, Hedrich H, van Lith H, Li F, Sartor RB, Mähler M. Genetic dissection of granulomatous enterocolitis and arthritis in the intramural peptidoglycan-polysaccharide-treated rat model of IBD. Inflamm Bowel Dis 2009; 15:1794-802. [PMID: 19526527 PMCID: PMC2889022 DOI: 10.1002/ibd.21018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [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: 05/06/2009] [Accepted: 05/06/2009] [Indexed: 12/14/2022]
Abstract
BACKGROUND Inflammatory arthropathies are common extraintestinal manifestations of inflammatory bowel diseases (IBD). As genetic susceptibility plays an important role in the etiology of IBD, we questioned how granulomatous enterocolitis and arthritis are genetically controlled in an experimental animal model displaying both conditions. METHODS Chronic intestinal and systemic inflammation was induced by intramural injection of peptidoglycan-polysaccharide (PG-PS) polymers in the ileocecal region of female F2 progeny derived from susceptible LEW and resistant F344 rats. Animals were followed for 24 days after injection and phenotyped by evaluating gross gut lesions, liver weight and granulomas, hematocrit, white blood cell count, and change in rear ankle joint diameters. Coinheritance of the phenotypic parameters with polymorphic DNA markers was analyzed by genome-wide quantitative trait locus (QTL) analysis. RESULTS Linkage analysis revealed significant QTLs for enterocolitis and/or related phenotypes (liver granulomas, white blood cell count) on chromosomes 8 and 17. The QTL on chromosome 8 also showed suggestive linkage to arthritis. Significant QTLs for arthritis were detected on chromosomes 10, 13, 15, and 17. Analyses of the modes of inheritance showed arthritogenic contributions by both parental genomes. In addition, several other loci with suggestive evidence for linkage to 1 or several phenotypes were found. CONCLUSIONS Susceptibility to PG-PS-induced chronic intestinal and systemic inflammation in rats is under complex multigenic control in which the genetic loci regulating arthritis are largely different from those controlling enterocolitis. Possible candidate genes within these QTL (including Tnfrsf11a/RANK, Gpc5, Il2ra, and Nfrkb) are also implicated in the respective human diseases.
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Affiliation(s)
- A. Bleich
- Institute for Laboratory Animal Science and Central Animal Facility, Hannover Medical School, Hannover, Germany
| | - S. Hopf
- Institute for Laboratory Animal Science and Central Animal Facility, Hannover Medical School, Hannover, Germany
| | - H.J. Hedrich
- Institute for Laboratory Animal Science and Central Animal Facility, Hannover Medical School, Hannover, Germany
| | - H.A. van Lith
- Department of Animals, Science and Society, Division of Laboratory Animal Science, Faculty of Veterinary Medicine, and Rudolf Magnus Institute of Neuroscience, Utrecht University, Utrecht, The Netherlands
| | - F. Li
- Center for Gastrointestinal Biology and Disease, University of North Carolina, Chapel Hill, USA
| | - R. Balfour Sartor
- Center for Gastrointestinal Biology and Disease, University of North Carolina, Chapel Hill, USA
| | - M. Mähler
- Institute for Laboratory Animal Science and Central Animal Facility, Hannover Medical School, Hannover, Germany
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Hopf S, Buchalla R, Elhöft H, Rubarth O, Börm W. [Atypical dislocated dens fracture type II with rotational atlantoaxial luxation after a riding accident]. Unfallchirurg 2009; 112:517-20. [PMID: 19404596 DOI: 10.1007/s00113-008-1542-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We present a rare case of a combined dislocated odontoid dens fracture type II (Anderson/D'Alonzo) and rotational atlantoaxial luxation in a 15-year-old girl who was involved in a riding accident.She fell off her horse after it had stopped suddenly, losing consciousness for a few minutes. At presentation in the hospital, she had no complaints other than limited, painful neck movement. Radiologically, a posterior dislocation of an odontoid type II fracture (Anderson/D'Alonzo) was found. Computed tomography reconstruction demonstrated a rotational, hooklike fixed luxation of the left atlantoaxial facet joint. Manual repositioning after application of a cervical collar failed. Therefore, operative treatment was indicated for this highly unstable fracture. Posterior transarticular atlantoaxial screw fixation according to Magerl was performed; an iliac corticocancellous bone graft was harvested and shaped to conform to the posterior processes of C1 and C2. Additionally a hook-claw atlas fixation of C1 was done.To our knowledge, this is the first case of adolescent atlantoaxial cervical spine trauma in combination with an odontoid fracture and fixed rotational luxation reported in literature.
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Affiliation(s)
- S Hopf
- Neurochirurgische Klinik, Diakonissenkrankenhaus Flensburg, Flensburg, Germany.
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Schnarr S, Hopf S, Zeidler H, Hammer M. [Detection of Borrelia DNA in urine using polymerase chain reaction in rheumatologic laboratory diagnosis of Lyme borreliosis]. Z Rheumatol 1998; 57:82-8. [PMID: 9627946 DOI: 10.1007/s003930050064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Borrelia burgdorferi specific DNA has been detected by polymerase chain reaction (PCR) in different specimens of patients with Lyme disease (LD). The aim of the present study is to evaluate PCR-diagnostic of urine specimens regarding rheumatologic diagnosis of Lyme disease. Urine specimens of 77 patients (LD, n = 34; undifferentiated arthritis (UA), n = 25; arthralgia/myalgia (AM), n = 18) and 15 controls were investigated. Flagellin gene (60 specimens) or OspA-plasmid (32 specimens) were used as targets. Sensitivity of the flagellin-nested-PCR was 27%, by OspA-nested-PCR only one positive PCR result was found. Despite of low sensitivity PCR enabled the correct diagnosis of LD in two patients classified as UA. Therefore, PCR can give valuable hints in single cases if LD is clinically suspected.
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Affiliation(s)
- S Schnarr
- Abteilung Rheumatologie, Medizinische Hochschule Hannover, Zentrum Innere Médizin und Dermatologie
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Kuipers JG, Scharmann K, Wollenhaupt J, Nettelnbreker E, Hopf S, Zeidler H. Sensitivities of PCR, MicroTrak, ChlamydiaEIA, IDEIA, and PACE 2 for purified Chlamydia trachomatis elementary bodies in urine, peripheral blood, peripheral blood leukocytes, and synovial fluid. J Clin Microbiol 1995; 33:3186-90. [PMID: 8586699 PMCID: PMC228670 DOI: 10.1128/jcm.33.12.3186-3190.1995] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Routine microbiological diagnosis of Chlamydia-induced reactive arthritis is based mainly on the detection of Chlamydia trachomatis with urogenital swabs or in urine. Because chlamydial antigen, rRNA, and DNA are present in low quantities in the inflamed joint, highly sensitive assays are needed to detect C. trachomatis not only at the primary site of infection but also in peripheral blood and peripheral blood leukocytes, which are suspected carriers for dissemination, and in synovial fluid. To evaluate possible tools for this purpose, the sensitivities of PCR, MicroTrak, Chlamydia EIA, IDEIA, and PACE 2 for the detection of defined numbers of purified C. trachomatis elementary bodies (EB) in urine, peripheral blood, peripheral blood leukocytes, and synovial fluid were determined. In urine, PCR detected 2, MicroTrak and ChlamydiaEIA detected 2 x 10(3), and PACE 2 and IDEIA detected 2 x 10(4) EB per ml. In peripheral blood, only PCR and MicroTrak detected C. trachomatis, with detection limits of 100 and 2 x 10(7) EB per ml, respectively. For peripheral blood leukocytes, the detection limits were 2 EB per ml for PCR and 2 x 10(4) EB per ml for MicroTrak, ChlamydiaEIA, IDEIA, and PACE 2. In synovial fluid, PCR detected 200, MicroTrak and IDEIA detected 2 x 10(5), and PACE 2 detected 10(6) EB per ml. ChlamydiaEIA was unable to detect 2 x 10(6) EB per ml in synovial fluid. In summary, PCR was found to be the most sensitive method. The sensitivities of the other methods tested were at least 1,000 times lower than that of PCR. PCR should therefore be considered a most promising tool for routine diagnosis of Chlamydia-induced arthritis.
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Affiliation(s)
- J G Kuipers
- Department of Internal Medicine and Dermatology, Hannover Medical School, Germany
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Hammer M, Nettelnbreker E, Hopf S, Schmitz E, Pörschke K, Zeidler H. Chlamydial rRNA in the joints of patients with Chlamydia-induced arthritis and undifferentiated arthritis. Clin Exp Rheumatol 1992; 10:63-6. [PMID: 1372544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
Synovial fluid and synovial membrane specimens of 11 patients with Chlamydia-induced arthritis (CIA), 24 patients with undifferentiated arthritis (UndA), 4 patients with post-enteritic reactive arthritis, 3 patients with Lyme arthritis and 9 patients with rheumatoid arthritis were investigated for the presence of Chlamydia trachomatis (C. trachomatis). A single stranded DNA-probe was used for nucleic acid hybridization with ribosomal RNA (rRNA) from C. trachomatis. In 4 patients (CIA = 1, UndA = 3) chlamydial rRNA was found in the synovial fluid. In one additional patient (CIA) the specimen of a synovial membrane biopsy was positive for chlamydial rRNA. The detection of intra-articular chlamydial rRNA is discussed as an indicator for the presence of viable Chlamydiae in inflamed joints.
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Affiliation(s)
- M Hammer
- Department of Internal Medicine, Medizinische Hochschule, Hannover, Germany
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Hopf S. Birth season shifts to a 13-month pattern in squirrel monkey groups kept indoors for 7-12 years. Folia Primatol (Basel) 1991; 56:214-8. [PMID: 1937285 DOI: 10.1159/000156550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- S Hopf
- Max-Planck-Institut für Psychiatrie, München, BRD
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Abstract
In 4 mixed-age captive groups of squirrel monkeys the predator alarm behavior control by means of visual stimuli was studied, and the extent to which socially inexperienced infant squirrel monkeys are capable of species-specific alarm behavior. By means of color film projection it was shown that both the socially experienced and inexperienced subjects recognized two-dimensional representations of real objects or situations. Behavioral reactions to visual stimulus patterns of terrestrial predators and graded controls revealed that recognition involves complex perceptional processes and is dependent on social experience. Using a series of systematically varied spot patterns, it was found that the monkeys generalize within a wide but well-defined range of stimuli. There was a clear-cut gender difference in alarm responses, with the males exerting a leading role both in onset and ceasing of terrestrial predator alarm. Both the socially experienced and inexperienced subjects responded with the species-specific avian alarm and flight reaction to fast moving patterns. Only the speed, not the shape, was relevant.
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Hopf S. Study of spontaneous behavior in squirrel monkey groups: observation techniques, recording devices, numerical evaluation and reliability tests. Folia Primatol (Basel) 1972; 17:363-88. [PMID: 4628330 DOI: 10.1159/000155455] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The purpose of this paper is to describe, examine, and discuss a relevant method for quantifying social behavior. The investigation is extended to each stage of the study: the process of observation, the different codes (observing, paper recording, computer storage), the programs, the numerical data reduction, and statistical testing, if reasonable models are available.
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Hopf S. New findings on the ontogeny of social behaviour in the squirrel monkey. Psychiatr Neurol Neurochir 1971; 74:21-34. [PMID: 5543259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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