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Xue X, Caballero-Solares A, Hall JR, Umasuthan N, Kumar S, Jakob E, Skugor S, Hawes C, Santander J, Taylor RG, Rise ML. Transcriptome Profiling of Atlantic Salmon ( Salmo salar) Parr With Higher and Lower Pathogen Loads Following Piscirickettsia salmonis Infection. Front Immunol 2022; 12:789465. [PMID: 35035387 PMCID: PMC8758579 DOI: 10.3389/fimmu.2021.789465] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/03/2021] [Indexed: 12/29/2022] Open
Abstract
Salmonid rickettsial septicemia (SRS), caused by Piscirickettsia salmonis, is one of the most devastating diseases of salmonids. However, the transcriptomic responses of Atlantic salmon (Salmon salar) in freshwater to an EM-90-like isolate have not been explored. Here, we infected Atlantic salmon parr with an EM-90-like isolate and conducted time-course qPCR analyses of pathogen load and four biomarkers (campb, hampa, il8a, tlr5a) of innate immunity on the head kidney samples. Transcript expression of three of these genes (except hampa), as well as pathogen level, peaked at 21 days post-injection (DPI). Multivariate analyses of infected individuals at 21 DPI revealed two infection phenotypes [lower (L-SRS) and higher (H-SRS) infection level]. Five fish from each group (Control, L-SRS, and H-SRS) were selected for transcriptome profiling using a 44K salmonid microarray platform. We identified 1,636 and 3,076 differentially expressed probes (DEPs) in the L-SRS and H-SRS groups compared with the control group, respectively (FDR = 1%). Gene ontology term enrichment analyses of SRS-responsive genes revealed the activation of a large number of innate (e.g. “phagocytosis”, “defense response to bacterium”, “inflammatory response”) and adaptive (e.g. “regulation of T cell activation”, “antigen processing and presentation of exogenous antigen”) immune processes, while a small number of general physiological processes (e.g. “apoptotic process”, development and metabolism relevant) was enriched. Transcriptome results were confirmed by qPCR analyses of 42 microarray-identified transcripts. Furthermore, the comparison of individuals with differing levels of infection (H-SRS vs. L-SRS) generated insights into the biological processes possibly involved in disease resistance or susceptibility. This study demonstrated a low mortality (~30%) EM-90-like infection model and broadened the current understanding of molecular pathways underlying P. salmonis-triggered responses of Atlantic salmon, identifying biomarkers that may assist to diagnose and combat this pathogen.
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Affiliation(s)
- Xi Xue
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada
| | | | - Jennifer R Hall
- Aquatic Research Cluster, CREAIT Network, Ocean Sciences Centre, Memorial University of Newfoundland, St. John's, NL, Canada
| | | | - Surendra Kumar
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Eva Jakob
- Cargill Innovation Centre - Colaco, Colaco, Chile
| | - Stanko Skugor
- Cargill Aqua Nutrition, Cargill, Sea Lice Research Center (SLRC), Sandnes, Norway
| | | | - Javier Santander
- Marine Microbial Pathogenesis and Vaccinology Lab, Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Richard G Taylor
- Cargill Animal Nutrition and Health, Elk River, MN, United States
| | - Matthew L Rise
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada
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Díaz R, Troncoso J, Jakob E, Skugor S. "Limiting access to iron decreases infection of Atlantic salmon SHK-1 cells with bacterium Piscirickettsia salmonis". BMC Vet Res 2021; 17:155. [PMID: 33849522 PMCID: PMC8043062 DOI: 10.1186/s12917-021-02853-6] [Citation(s) in RCA: 8] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 03/25/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Vertebrate hosts limit the availability of iron to microbial pathogens in order to nutritionally starve the invaders. The impact of iron deficiency induced by the iron chelator deferoxamine mesylate (DFO) was investigated in Atlantic salmon SHK-1 cells infected with the facultative intracellular bacterium Piscirickettsia salmonis. RESULTS Effects of the DFO treatment and P. salmonis on SHK-1 cells were gaged by assessing cytopathic effects, bacterial load and activity, and gene expression profiles of eight immune biomarkers at 4- and 7-days post infection (dpi) in the control group, groups receiving single treatments (DFO or P. salmonis) and their combination. The chelator appears to be well-tolerated by host cells, while it had a negative impact on the number of bacterial cells and associated cytotoxicity. DFO alone had minor effects on gene expression of SHK-1 cells, including an early activation of IL-1β at 4 dpi. In contrast to few moderate changes induced by single treatments (either infection or chelator), most genes had highest upregulation in the infected groups receiving DFO. The mildest induction of hepcidin-1 (antimicrobial peptide precursor and regulator of iron homeostasis) was observed in cells exposed to DFO alone, followed by P. salmonis infected cells while the addition of DFO to infected cells further increased the mRNA abundance of this gene. Transcripts encoding TNF-α (immune signaling) and iNOS (immune effector) showed sustained increase at both time points in this group while cathelicidin-1 (immune effector) and IL-8 (immune signaling) were upregulated at 7 dpi. The stimulation of protective gene responses seen in infected cultures supplemented with DFO coincided with the reduction of bacterial load and activity (judged by the expression of P. salmonis 16S rRNA), and damage to cultured host cells. CONCLUSION The absence of immune gene activation under normal iron conditions suggests modulation of host responses by P. salmonis. The negative effect of iron deficiency on bacteria likely allowed host cells to respond in a more protective manner to the infection, further decreasing its progression. Presented findings encourage in vivo exploration of iron chelators as a promising strategy against piscirickettsiosis.
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Affiliation(s)
- Rodrigo Díaz
- Cargill Innovation Centre, Camino a Pargua km 57, Colaco km 5, Calbuco, Puerto Montt, Chile
| | - José Troncoso
- Cargill Innovation Centre, Camino a Pargua km 57, Colaco km 5, Calbuco, Puerto Montt, Chile
| | - Eva Jakob
- Cargill Innovation Centre, Camino a Pargua km 57, Colaco km 5, Calbuco, Puerto Montt, Chile
| | - Stanko Skugor
- Cargill Innovation Centre, Dirdalsstranda 51, 4335, Dirdal, Norway.
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Eslamloo K, Caballero-Solares A, Inkpen SM, Emam M, Kumar S, Bouniot C, Avendaño-Herrera R, Jakob E, Rise ML. Transcriptomic Profiling of the Adaptive and Innate Immune Responses of Atlantic Salmon to Renibacterium salmoninarum Infection. Front Immunol 2020; 11:567838. [PMID: 33193341 PMCID: PMC7656060 DOI: 10.3389/fimmu.2020.567838] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 09/07/2020] [Indexed: 01/08/2023] Open
Abstract
Bacterial Kidney Disease (BKD), which is caused by a Gram-positive, intracellular bacterial pathogen (Renibacterium salmoninarum), affects salmonids including Atlantic salmon (Salmo salar). However, the transcriptome response of Atlantic salmon to BKD remained unknown before the current study. We used a 44K salmonid microarray platform to characterise the global gene expression response of Atlantic salmon to BKD. Fish (~54 g) were injected with a dose of R. salmoninarum (H-2 strain, 2 × 108 CFU per fish) or sterile medium (control), and then head kidney samples were collected at 13 days post-infection/injection (dpi). Firstly, infection levels of individuals were determined through quantifying the R. salmoninarum level by RNA-based TaqMan qPCR assays. Thereafter, based on the qPCR results for infection level, fish (n = 5) that showed no (control), higher (H-BKD), or lower (L-BKD) infection level at 13 dpi were subjected to microarray analyses. We identified 6,766 and 7,729 differentially expressed probes in the H-BKD and L-BKD groups, respectively. There were 357 probes responsive to the infection level (H-BKD vs. L-BKD). Several adaptive and innate immune processes were dysregulated in R. salmoninarum-infected Atlantic salmon. Adaptive immune pathways associated with lymphocyte differentiation and activation (e.g., lymphocyte chemotaxis, T-cell activation, and immunoglobulin secretion), as well as antigen-presenting cell functions, were shown to be differentially regulated in response to BKD. The infection level-responsive transcripts were related to several mechanisms such as the JAK-STAT signalling pathway, B-cell differentiation and interleukin-1 responses. Sixty-five microarray-identified transcripts were subjected to qPCR validation, and they showed the same fold-change direction as microarray results. The qPCR-validated transcripts studied herein play putative roles in various immune processes including pathogen recognition (e.g., tlr5), antibacterial activity (e.g., hamp and camp), regulation of immune responses (e.g., tnfrsf11b and socs1), T-/B-cell differentiation (e.g., ccl4, irf1 and ccr5), T-cell functions (e.g., rnf144a, il13ra1b and tnfrsf6b), and antigen-presenting cell functions (e.g., fcgr1). The present study revealed diverse immune mechanisms dysregulated by R. salmoninarum in Atlantic salmon, and enhanced the current understanding of Atlantic salmon response to BKD. The identified biomarker genes can be used for future studies on improving the resistance of Atlantic salmon to BKD.
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Affiliation(s)
- Khalil Eslamloo
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada
| | | | - Sabrina M Inkpen
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Mohamed Emam
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Surendra Kumar
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada
| | | | - Ruben Avendaño-Herrera
- Facultad Ciencias de la Vida, Viña del Mar, and FONDAP Interdisciplinary Center for Aquaculture Research (INCAR), Universidad Andrés Bello, Santiago, Chile
| | - Eva Jakob
- Cargill Innovation Center-Colaco, Calbuco, Chile
| | - Matthew L Rise
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada
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Harris M, Thulesius H, Neves AL, Harker S, Koskela T, Petek D, Hoffman R, Brekke M, Buczkowski K, Buono N, Costiug E, Dinant GJ, Foreva G, Jakob E, Marzo-Castillejo M, Murchie P, Sawicka-Powierza J, Schneider A, Smyrnakis E, Streit S, Taylor G, Vedsted P, Weltermann B, Esteva M. How European primary care practitioners think the timeliness of cancer diagnosis can be improved: a thematic analysis. BMJ Open 2019; 9:e030169. [PMID: 31551382 PMCID: PMC6773305 DOI: 10.1136/bmjopen-2019-030169] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND National European cancer survival rates vary widely. Prolonged diagnostic intervals are thought to be a key factor in explaining these variations. Primary care practitioners (PCPs) frequently play a crucial role during initial cancer diagnosis; their knowledge could be used to improve the planning of more effective approaches to earlier cancer diagnosis. OBJECTIVES This study sought the views of PCPs from across Europe on how they thought the timeliness of cancer diagnosis could be improved. DESIGN In an online survey, a final open-ended question asked PCPs how they thought the speed of diagnosis of cancer in primary care could be improved. Thematic analysis was used to analyse the data. SETTING A primary care study, with participating centres in 20 European countries. PARTICIPANTS A total of 1352 PCPs answered the final survey question, with a median of 48 per country. RESULTS The main themes identified were: patient-related factors, including health education; care provider-related factors, including continuing medical education; improving communication and interprofessional partnership, particularly between primary and secondary care; factors relating to health system organisation and policies, including improving access to healthcare; easier primary care access to diagnostic tests; and use of information technology. Re-allocation of funding to support timely diagnosis was seen as an issue affecting all of these. CONCLUSIONS To achieve more timely cancer diagnosis, health systems need to facilitate earlier patient presentation through education and better access to care, have well-educated clinicians with good access to investigations and better information technology, and adequate primary care cancer diagnostic pathway funding.
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Affiliation(s)
- Michael Harris
- Department for Health, University of Bath, Bath, UK
- Berner Institut für Hausarztmedizin (BIHAM), University of Bern, Bern, Switzerland
| | - Hans Thulesius
- Department of Clinical Sciences, Lund University, Lund, Sweden
- Department of Research and Development, Region Kronoberg, Sweden
| | - Ana Luísa Neves
- Institute of Global Health Innovation, Imperial College London, London, UK
- CINTESIS (Centre for Health Technology and Services Research) and MEDCIDS (Department of Community Medicine, Information and Health Decision Sciences), Faculty of Medicine, University of Porto, Porto, Portugal
| | | | - Tuomas Koskela
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Davorina Petek
- Department of Family Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Robert Hoffman
- Department of Family Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Mette Brekke
- Department of General Practice and General Practice Research Unit, University of Oslo, Oslo, Norway
| | | | - Nicola Buono
- Department of General Practice, National Society of Medical Education in General Practice (SNaMID), Caserta, Italy
| | - Emiliana Costiug
- Family Medicine Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Geert-Jan Dinant
- Department of General Practice, Maastricht University, Maastricht, The Netherlands
| | | | - Eva Jakob
- Primary Health Centre, Centro de Saúde Sarria, Sarria, Lugo, Spain
| | - Mercè Marzo-Castillejo
- Unitat de Suport a la Recerca, IDIAP Jordi Gol, Institut Català de la Salut, Barcelona, Spain
| | - Peter Murchie
- Division of Applied Health Sciences - Academic Primary Care, University of Aberdeen, Aberdeen, UK
| | | | - Antonius Schneider
- TUM School of Medicine, Institute of General Practice and Health Services Research, Technical University of Munich, München, Germany
| | - Emmanouil Smyrnakis
- Laboratory of Primary Health Care, General Practice and Health Services Research, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Sven Streit
- Berner Institut für Hausarztmedizin (BIHAM), University of Bern, Bern, Switzerland
| | - Gordon Taylor
- College of Medicine and Health, University of Exeter, Exeter, UK
| | - Peter Vedsted
- Research Unit for General Practice, Aarhus University, Aarhus, Denmark
| | | | - Magdalena Esteva
- Research Unit, Majorca Primary Health Care Department, Balearic Islands Health Research Institute (IdISBa), Preventive Activities and Health Promotion Network, Carlos III Institute of Health (RedIAPP-RETICS), Palma de Mallorca, Spain
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Harris M, Vedsted P, Esteva M, Murchie P, Aubin-Auger I, Azuri J, Brekke M, Buczkowski K, Buono N, Costiug E, Dinant GJ, Foreva G, Gašparović Babić S, Hoffman R, Jakob E, Koskela TH, Marzo-Castillejo M, Neves AL, Petek D, Petek Ster M, Sawicka-Powierza J, Schneider A, Smyrnakis E, Streit S, Thulesius H, Weltermann B, Taylor G. Identifying important health system factors that influence primary care practitioners' referrals for cancer suspicion: a European cross-sectional survey. BMJ Open 2018; 8:e022904. [PMID: 30185577 PMCID: PMC6129106 DOI: 10.1136/bmjopen-2018-022904] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
OBJECTIVES Cancer survival and stage of disease at diagnosis and treatment vary widely across Europe. These differences may be partly due to variations in access to investigations and specialists. However, evidence to explain how different national health systems influence primary care practitioners' (PCPs') referral decisions is lacking.This study analyses health system factors potentially influencing PCPs' referral decision-making when consulting with patients who may have cancer, and how these vary between European countries. DESIGN Based on a content-validity consensus, a list of 45 items relating to a PCP's decisions to refer patients with potential cancer symptoms for further investigation was reduced to 20 items. An online questionnaire with the 20 items was answered by PCPs on a five-point Likert scale, indicating how much each item affected their own decision-making in patients that could have cancer. An exploratory factor analysis identified the factors underlying PCPs' referral decision-making. SETTING A primary care study; 25 participating centres in 20 European countries. PARTICIPANTS 1830 PCPs completed the survey. The median response rate for participating centres was 20.7%. OUTCOME MEASURES The factors derived from items related to PCPs' referral decision-making. Mean factor scores were produced for each country, allowing comparisons. RESULTS Factor analysis identified five underlying factors: PCPs' ability to refer; degree of direct patient access to secondary care; PCPs' perceptions of being under pressure; expectations of PCPs' role; and extent to which PCPs believe that quality comes before cost in their health systems. These accounted for 47.4% of the observed variance between individual responses. CONCLUSIONS Five healthcare system factors influencing PCPs' referral decision-making in 20 European countries were identified. The factors varied considerably between European countries. Knowledge of these factors could assist development of health service policies to produce better cancer outcomes, and inform future research to compare national cancer diagnostic pathways and outcomes.
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Affiliation(s)
- Michael Harris
- Department for Health, University of Bath, Bath, UK
- Institute of Primary Health Care Bern (BIHAM), University of Bern, Bern, Switzerland
| | - Peter Vedsted
- Research Unit for General Practice, Aarhus University, Aarhus, Denmark
| | - Magdalena Esteva
- Research Unit, Majorca Primary Health Care Department, Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Peter Murchie
- Division of Applied Health Sciences—Academic Primary Care, University of Aberdeen, Aberdeen, UK
| | | | - Joseph Azuri
- Department of Family Medicine, Sackler Medical School, Tel Aviv University, Tel Aviv, Israel
| | - Mette Brekke
- Department of General Practice and General Practice Research Unit, University of Oslo, Oslo, Norway
| | | | - Nicola Buono
- Department of General Practice, National Society of Medical Education in General Practice (SNaMID), Caserta, Italy
| | - Emiliana Costiug
- Family Medicine Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Geert-Jan Dinant
- Department of General Practice, Maastricht University, Maastricht, The Netherlands
| | | | - Svjetlana Gašparović Babić
- Odjel Socijalne Medicine, The Teaching Institute of Public Health of Primorsko-goranska County, Rijeka, Croatia
| | - Robert Hoffman
- Department of Family Medicine, Sackler Medical School, Tel Aviv University, Tel Aviv, Israel
| | - Eva Jakob
- Primary Health Centre, Centro de Saúde Sarria, Sarria, Spain
| | - Tuomas H Koskela
- Department of General Practice, Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Mercè Marzo-Castillejo
- Unitat de Suport a la Recerca, IDIAP Jordi Gol, Institut Catala De La Salut, Barcelona, Spain
| | - Ana Luísa Neves
- Centre for Health Policy, Institute of Global Health Innovation, Imperial College London, London, UK
- CINTESIS (Center for Health Technology and Services Research) and MEDCIDS (Department of Community Medicine, Information and Health Decision Sciences), Faculty of Medicine, University of Porto, Porto, Portugal
| | - Davorina Petek
- Department of Family Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Marija Petek Ster
- Department of Family Medicine, University of Ljubljana, Ljubljana, Slovenia
| | | | - Antonius Schneider
- Institute of General Practice and Health Services Research, Technische Universität München, Munich, Germany
| | - Emmanouil Smyrnakis
- Laboratory of Primary Health Care, General Practice and Health Services Research, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Sven Streit
- Institute of Primary Health Care Bern (BIHAM), University of Bern, Bern, Switzerland
| | - Hans Thulesius
- Department of Clinical Sciences, Lund University, Malmö, Sweden
| | - Birgitta Weltermann
- Institute for Family Medicine and General Practice, University of Bonn, Bonn, Germany
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Mackensen F, Heinz C, Jakob E, Grewing V, Lorenz HM, Heiligenhaus A, Max R, Becker MD. Randomized Controlled Study to Evaluate the Efficacy of Adalimumab in Patients with Different Forms of Refractory Uveitis. Ocul Immunol Inflamm 2017; 26:1015-1022. [PMID: 29286865 DOI: 10.1080/09273948.2017.1411518] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
PURPOSE TNF alpha inhibitors have revolutionized the care of vision-threatening uveitis. This study evaluated the efficacy of adalimumab (ADA) for the treatment of refractory noninfectious uveitis. DESIGN Randomized, prospective, controlled, two-center clinical trial Methods: Patients with active uveitis despite combined oral low-dose prednisolone and immunosuppression were randomized for additional ADA with corticosteroids in a fixed tapering regime, or corticosteroids only. Primary outcome measure at three months was improved best-corrected visual acuity (BCVA; >2 lines). In case of treatment failure, switch to the other arm was possible. RESULTS Twenty-five patients (10 ADA, 15 controls) were included. BCVA increased with ADA by > 2 lines in 6/10 patients (60%; mean increase of 0.23 logMAR), but in only 2/15 from controls (13%, mean increase of 0.04 logMAR, Fisher´s exact test p = 0.00221). CONCLUSIONS The results show superiority of ADA over controls in severe ocular inflammation including anterior uveitis.
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Affiliation(s)
- Friederike Mackensen
- a Department of Ophthalmology , University Hospital of Heidelberg, Heidelberg , Germany.,b Interdisciplinary Uveitis Center , University of Heidelberg, Heidelberg , Germany
| | - Carsten Heinz
- c Department of Ophthalmology , at St Franziskus Hospital , Münster , Germany
| | - Eva Jakob
- a Department of Ophthalmology , University Hospital of Heidelberg, Heidelberg , Germany.,b Interdisciplinary Uveitis Center , University of Heidelberg, Heidelberg , Germany
| | - Viviane Grewing
- a Department of Ophthalmology , University Hospital of Heidelberg, Heidelberg , Germany.,b Interdisciplinary Uveitis Center , University of Heidelberg, Heidelberg , Germany
| | - Hanns-Martin Lorenz
- d Department of Internal Medicine V, University Hospital of Heidelberg, Heidelberg, Germany
| | - Arnd Heiligenhaus
- c Department of Ophthalmology , at St Franziskus Hospital , Münster , Germany
| | - Regina Max
- b Interdisciplinary Uveitis Center , University of Heidelberg, Heidelberg , Germany.,d Department of Internal Medicine V, University Hospital of Heidelberg, Heidelberg, Germany
| | - Matthias D Becker
- a Department of Ophthalmology , University Hospital of Heidelberg, Heidelberg , Germany.,b Interdisciplinary Uveitis Center , University of Heidelberg, Heidelberg , Germany.,e Department of Ophthalmology , Triemli Hospital, Zürich , Switzerland
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Jakob E, Max R, Zimmermann S, Dalpke AH, Alle W, Becker M, Mackensen F. Three Years of Experience with QuantiFERON-TB Gold Testing in Patients with Uveitis. Ocul Immunol Inflamm 2014; 22:478-84. [DOI: 10.3109/09273948.2013.866255] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Pelegrin L, Jakob E, Schmidt-Bacher A, Schwenger V, Becker M, Max R, Lorenz HM, Mackensen F. Experiences with rituximab for the treatment of autoimmune diseases with ocular involvement. J Rheumatol 2013; 41:84-90. [PMID: 24241484 DOI: 10.3899/jrheum.130206] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To report the efficacy of rituximab (RTX) in the treatment of ocular or orbital inflammation accompanying autoimmune diseases refractory to previous standard immunosuppressive therapy. METHODS We reviewed medical records of 9 consecutive patients with noninfectious ocular or orbital inflammation treated with RTX. RESULTS Over a mean followup of 42 months, 7 patients were in clinical remission, 1 had partial response to treatment, and 1 did not respond. Best corrected visual acuity improved ≥ 1 line in 4 patients, was stable in another 4 patients, and worsened in 1. Concomitant immunosuppressive therapy was tapered in 6 cases. Systemic corticosteroids were tapered or kept below 7.5 mg a day in 5 patients 1 year after the first RTX cycle. CONCLUSION RTX therapy, in patients who are refractory to standard immunosuppressive therapy, was effective and showed a beneficial response to treatment including induction of clinical remission of inflammation in most patients.
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Affiliation(s)
- Laura Pelegrin
- From the Hospital Clinic de Barcelona, Universidad de Barcelona, Spain; Department of Ophthalmology, Department of Nephrology, Interdisciplinary Uveitis Center, Rheumatology Department for Internal Medicine V, University of Heidelberg, Heidelberg, Germany; and the Department of Ophthalmology, Triemli Spital, Zürich, Switzerland
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Jakob E, Sweeten T, Bennett W, Jones SRM. Development of the salmon louse Lepeophtheirus salmonis and its effects on juvenile sockeye salmon Oncorhynchus nerka. Dis Aquat Organ 2013; 106:217-27. [PMID: 24191999 DOI: 10.3354/dao02642] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Responses of sockeye salmon Oncorhynchus nerka during infection with Lepeophtheirus salmonis were assessed in controlled laboratory trials. Juvenile salmon were exposed to 100 copepodids fish-1 (Trials 1 and 2) or 300 copepodids fish-1 (Trial 3) at mean weights of approximately 40, 80 and 135 g, respectively. Infections occurred on all salmon in all trials, and mean abundances (infection densities) ranged between 3.3 and 19.4 lice fish-1 (0.08 and 0.44 lice g-1 fish) in Trial 1, between 7.2 and 18.3 (0.09 and 0.22) in Trial 2 and between 19.5 and 60.7 (0.15 and 0.46) in Trial 3. A cumulative mortality of 24.4% occurred in Trial 3. At attachment sites on gills, we observed hyperplasia of basal epithelial cells and fusion of secondary lamellae occasionally associated with a cellular infiltrate. At attachment sites on fins, partial to complete skin erosion occurred, with limited evidence of hyperplasia or inflammation. Scale loss and abrasions coincided with pre-adult lice around 20 d post infection (dpi). Plasma osmolality was significantly elevated in exposed fish in Trials 1 (21 dpi), 2 (15 and 36 dpi) and 3 (20 dpi), whereas haematocrit was significantly depressed in exposed fish in Trials 1 (21 and 28 dpi) and 3 (20 dpi). Plasma cortisol was significantly elevated in exposed fish at 20 dpi (Trial 3). Physiological changes and mortality were related to the intensity of infection and became most prominent with pre-adult stages, suggesting patterns of infection and response in sockeye salmon similar to those reported for Atlantic and Chinook salmon.
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Affiliation(s)
- E Jakob
- Fraunhofer Chile Research, Aquaculture Division, Carretera Austral Km 25, Quillaipe, Chile
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Eckerle I, Jakob E, Hofmann J, Schmidt-Bacher A, Ettinger J, Schnitzler P. Atypical severe Puumala hantavirus infection and virus sequence analysis of the patient and regional reservoir host. Zoonoses Public Health 2013; 59 Suppl 2:110-5. [PMID: 22958255 DOI: 10.1111/j.1863-2378.2011.01452.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Nephropathia epidemica (NE) caused by Puumala hantavirus (PUUV) is a mild variant of haemorrhagic fever with renal syndrome, which is endemic in Germany. We describe the case of a 67-year-old man initially presenting with acute bilateral angle-closure glaucoma, an atypical clinical presentation of PUUV infection. Subsequently, the patient developed a severe course of disease additionally complicated by profound hepatitis and interstitial nephritis, both phenomena which are rarely described in association with hantavirus infection. Serologic diagnosis was complicated by delayed antibody production until the 10th day of illness; however, PUUV RNA was detectable early in disease. To further analyse this unusual case, sequencing of the PUUV S segment was performed from the patient and regional reservoir host which showed a close relation.
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Affiliation(s)
- I Eckerle
- Department of Nephrology, University of Heidelberg, Heidelberg, Germany
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11
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Mackensen F, Jakob E, Springer C, Dobner BC, Wiehler U, Weimer P, Rohrschneider K, Fiehn C, Max R, Storch-Hagenlocher B, Becker MD. Interferon versus methotrexate in intermediate uveitis with macular edema: results of a randomized controlled clinical trial. Am J Ophthalmol 2013; 156:478-486.e1. [PMID: 23786783 DOI: 10.1016/j.ajo.2013.05.002] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 05/01/2013] [Accepted: 05/02/2013] [Indexed: 10/26/2022]
Abstract
PURPOSE To compare interferon (IFN) beta with methotrexate (MTX) in the treatment of intermediate uveitis with macular edema. DESIGN Monocentric, prospective, randomized, controlled clinical trial. METHODS SETTING Specialized uveitis center at the University of Heidelberg. PATIENT OR STUDY POPULATION: Patients with either primary intermediate uveitis or uveitis associated with multiple sclerosis. MAIN INCLUSION CRITERIA: Visual acuity of 20/30 or worse (0.2 logarithm of the minimal angle of resolution) and macular edema of more than 250 μm (central 1-mm in optical coherence tomography; Stratus). Randomization into either IFN beta 44 μg subcutaneously 3 times weekly or 20 mg MTX subcutaneously once weekly. MAIN OUTCOME MEASURES At 3 months, the primary outcome parameter of mean change in visual acuity was evaluated and efficacy was determined. Secondary parameters were macular edema by optical coherence tomography, inflammatory activity, and retinal sensitivity by microperimetry (MP-1; Nidek). In case of treatment failure, switching to the other treatment arm was possible. RESULTS Nineteen patients were included. Ten were randomized to MTX, and 9 were randomized to IFN beta. At 3 months, visual acuity improved a mean 0.31 logarithm of the minimal angle of resolution (range, -0.02 to -0.96, 15.6 letters on the Early Treatment Diabetic Retinopathy Study chart) in the IFN beta group versus a mean 0.09 logarithm of the minimal angle of resolution (range, 0.12 to -0.38, 4.7 letters) in the MTX arm (P = .0435, Mann-Whitney U test). Macular thickness decreased by a mean of 206 μm (range, -41 to -416 μm) in the IFN arm, but increased by 47 μm (range, 108 to -28 μm) in the MTX group (P < .0001). CONCLUSIONS Although the sample size is small, results of the trial support superiority of IFN beta over MTX in the treatment of macular edema in the setting of intermediate uveitis.
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12
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Jakob E, Barker DE, Garver KA. Vector potential of the salmon louse Lepeophtheirus salmonis in the transmission of infectious haematopoietic necrosis virus (IHNV). Dis Aquat Organ 2011; 97:155-65. [PMID: 22303632 DOI: 10.3354/dao02414] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
To better understand the role of vector transmission of aquatic viruses, we established an in vivo virus-parasite challenge specifically to address (1) whether Lepeophtheirus salmonis can acquire infectious haematopoietic necrosis virus (IHNV) after water bath exposure or via parasitizing infected Atlantic salmon Salmo salar and if so, define the duration of this association and (2) whether L. salmonis can transmit IHNV to naive Atlantic salmon and whether this transmission requires attachment to the host. Salmon lice which were water bath-exposed to 1 x 10(5) plaque-forming units (pfu) ml(-1) of IHNV for 1 h acquired the virus (2.1 x 10(4) pfu g(-1)) and remained IHNV-positive for 24 h post exposure. After parasitizing IHNV-infected hosts (viral titer in fish mucus 3.3 x 10(4) pfu ml(-1)) salmon lice acquired IHNV (3.4 x 10(3) pfu g(-1)) and remained virus-positive for 12 h. IHNV-positive salmon lice generated through water bath exposure or after parasitizing infected Atlantic salmon successfully transmitted IHNV, resulting in 76.5 and 86.6% of the exposed Atlantic salmon testing positive for IHNV, respectively. In a second experiment, only salmon lice that became IHNV-positive through water bath exposure transmitted IHNV to 20% of the naive fish, and no virus was transmitted when IHNV-infected salmon lice were cohabitated but restrained from attaching to naive fish. Under laboratory conditions, adult L. salmonis can acquire IHNV and transmit it to naive Atlantic salmon through parasitism. However, the ephemeral association of IHNV with L. salmonis indicates that the salmon louse act as a mechanical rather than a biological vector or reservoir.
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Affiliation(s)
- E Jakob
- Fisheries & Oceans Canada, Pacific Biological Station, 3190 Hammond Bay Road, Nanaimo, British Columbia V9T 6N7, Canada.
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13
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Grant AAM, Jakob E, Richard J, Garver KA. Concentration of infectious aquatic rhabdoviruses from freshwater and seawater using ultrafiltration. J Aquat Anim Health 2011; 23:218-223. [PMID: 22372250 DOI: 10.1080/08997659.2011.644412] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Infectious hematopoietic necrosis virus (IHNV), viral hemorrhagic septicemia virus, and spring viremia of carp virus were concentrated and detected from freshwater and seawater samples by using hollow-fiber ultrafiltration. Within 60 min, virus in a 50-L freshwater or saltwater sample was concentrated more than 70-fold, and virus retention efficiencies were consistently greater than 88%. Retention efficiency was highly dependent upon concentrations of column blocking and sample stabilization solutions. A large column with a surface area of 1.15 m2 and a filtration capacity of 5-200 L exhibited optimal viral retention when blocked with 2% fetal bovine serum (FBS) and when the samples were supplemented with 0.1% FBS. Conversely, a small column with 100-fold less surface area and a filtering capacity of 0.5-2.0 L was optimized when blocked with 1% FBS and when the samples were supplemented with 0.1% FBS. The optimized ultrafiltration procedure was further validated with water from a tank that contained IHNV-exposed juvenile sockeye salmon Oncorhynchus nerka, resulting in an average virus retention efficiency of 91.6 +/- 4.1% (mean +/- SE). Virus quantification of concentrated samples demonstrated that IHNV shedding in sockeye salmon preceded mortality; shedding of the virus was observed to increase significantly as early as 7 d postchallenge and peaked at day 14, when virus levels reached 4.87 x 10(3) plaque-forming units/mL. We conclude that ultrafiltration is a reliable and effective method for concentrating viable aquatic rhabdoviruses from large volumes of water and has application for the analysis of environmental water samples.
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Affiliation(s)
- Amelia A M Grant
- Fisheries and Oceans Canada, Pacific Biological Station, 3190 Hammond Bay Road, Nanaimo, British Columbia V9T 6N7, Canada
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Mackensen F, Zimmermann S, Alle W, Max R, Jakob E, Becker MD, Thiemeyer D. Difficulties of InterpretingBorreliaSerology in Patients with Uveitis. Ocul Immunol Inflamm 2011; 19:227-31. [DOI: 10.3109/09273948.2011.568662] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Abstract
BACKGROUND Outer lamellar macular holes (OLMH) are very rare compared to inner lamellar macular holes. An OLMH can occur associated with optic pit maculopathy, in the progression of myopic macular retinoschisis, transient in the development of full thickness macular holes or idiopathic. This article reports on infrared imaging of OLMHs. METHODS Infrared (IR) images in 2 patients aged 22 and 34 years with OLMH were taken using IR reflection at a wavelength of 820 nm with a confocal scanning laser ophthalmoscope (Heidelberg Retina Angiograph 2, Heidelberg Engineering). IR images were correlated with linear optical coherence tomography (OCT) scans (Stratus-OCT, Zeiss). Images were acquired during follow-up of up to 30 months and if applicable preoperatively and postoperatively. RESULTS Clear infrared signals were recorded especially in OLMH associated with optic pit maculopathy. Correlation with linear OCT scans showed the enhanced infrared signals to be restricted to the extent of the OLMH. The borders of the OLMH could be clearly delineated. Infrared imaging enables a top view of OLMH and therefore allows an excellent documentation of the course of OLMH. CONCLUSIONS Infrared reflection is useful for two-dimensional imaging of OLMH. Infrared imaging can provide a supplement to slice imaging for OCT diagnostics and allows monitoring of OLMH over time. The postoperative sequence of OLMH closure in patients with optic pit maculopathy can be studied in more detail using infrared imaging.
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Affiliation(s)
- K B Schaal
- Schwerpunkt Retinologie, Universitäts-Augenklinik Heidelberg, Heidelberg
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Jakob E, Neuhaus H, Steinhagen D, Luckhardt B, Hanel R. Monitoring of Herpesvirus anguillae (HVA) infections in European eel, Anguilla anguilla (L.), in northern Germany. J Fish Dis 2009; 32:557-561. [PMID: 19460086 DOI: 10.1111/j.1365-2761.2009.01009.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- E Jakob
- Leibniz Institute of Marine Sciences, Kiel, Germany
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Karlowatz RJ, Scharhag J, Rahnenfuhrer J, Schneider U, Jakob E, Kindermann W, Zang KD. Polymorphisms in the IGF1 signalling pathway including the myostatin gene are associated with left ventricular mass in male athletes. Br J Sports Med 2009; 45:36-41. [DOI: 10.1136/bjsm.2008.050567] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kruse R, Rütten A, Schweiger N, Jakob E, Mathiak M, Propping P, Mangold E, Bisceglia M, Ruzicka T. Frequency of microsatellite instability in unselected sebaceous gland neoplasias and hyperplasias. J Invest Dermatol 2003; 120:858-64. [PMID: 12713593 DOI: 10.1046/j.1523-1747.2003.12125.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [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: 11/20/2022]
Abstract
Sebaceous gland neoplasias are the cutaneous manifestation of the Muir-Torre syndrome, which is known to be a phenotypical variant of hereditary nonpolyposis colorectal cancer. Both hereditary nonpolyposis colorectal cancer and Muir-Torre syndrome are caused by inherited DNA mismatch repair defects. As a prominent molecular genetic feature, all tumors associated with a DNA mismatch repair defect exhibit high microsatellite instability. So far, the frequency of DNA mismatch repair defects in patients selected solely on the basis of a sebaceous gland tumor has never been determined. In order to estimate this frequency, we assessed microsatellite instability with up to 10 microsatellite markers in a newly collected unselected series of 25 sebaceous gland neoplasias (six sebaceous adenomas, 16 sebaceous epitheliomas, three sebaceous carcinomas) in comparison to 32 sebaceous gland hyperplasias from unrelated patients. As many as 15 of the 25 sebaceous gland neoplasias (60%), but only one of the 32 sebaceous gland hyperplasias (3%), exhibited high microsatellite instability. Thus, in our study, the majority of patients with a sebaceous gland neoplasia in contrast to patients with a sebaceous gland hyperplasia are highly suspicious for an inherited DNA mismatch repair defect. On the basis of the subsequently collected tumor histories, nine of the 15 patients with a high microsatellite unstable sebaceous gland neoplasia were identified to have Muir-Torre syndrome. In none of these cases, however, were the clinical Amsterdam criteria for diagnosing hereditary nonpolyposis colorectal cancer fulfilled. In the sebaceous tumors of the remaining six patients, high microsatellite instability was an incidental finding. In two of these six patients, single relatives were known to be affected with internal cancer; however, their family histories were not suggestive of Muir-Torre syndrome or hereditary nonpolyposis colorectal cancer. In comparison with microsatellite instability screening studies in a variety of other randomly selected tumors, our study identifies sebaceous gland neoplasias as tumors with the highest frequency of high microsatellite instability reported so far, whereas sebaceous gland hyperplasia rarely exhibits high microsatellite instability. Therefore, screening for microsatellite instability in sebaceous gland neoplasias will be of great value in the detection of an inherited DNA mismatch repair defect, which predisposes to various types of internal cancers.
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Affiliation(s)
- Roland Kruse
- Department of Dermatology, University of Duesseldorf, Germany.
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Abstract
Fibromyalgia (FM) is a disorder characterised by diffuse widespread musculoskeletal aching and stiffness and multiple tender points [1]. Its pathophysiology is poorly understood. The influence of aerobic endurance exercise on pain in patients with FM was investigated. Twenty-seven patients (25 female, 2 male) participated in a controlled clinical study and performed 12 weeks of jogging, walking, cycling or swimming following a given schedule. Twelve sedentary FM patients (11 female, 1 male) served as controls. Before and after training both the study and the control groups were evaluated spiroergometrically. Tender point pain was quantified by dolorimetry. The painful body surface was estimated by a pain body diagram, and its intensity by a visual analogue scale and a ranking scale. Patients trained for an average of 25 min two to three times a week, with an average intensity of 50% of maximal oxygen uptake (VO2max). Unlike the control group, the training group exhibited a decrease in heart rate and VO2 and an increase in respiratory quotient during submaximal workload. Maximal performance capacity and VO2max remained unchanged, whereas the wattpulse (watt/heart rate) improved at maximal workload. Pain parameters remained unchanged in the control group, but in the training group the mean number of positive tender points (15.4/12.7), the mean pain threshold of the gluteal tender point (2.89 kp/3.50 kp) and the painful body surface (18%/15% body surface) decreased significantly. Subjective general pain condition deteriorated in two patients but improved in 17. Our results suggest a positive effect of aerobic endurance exercise on fitness and well-being in patients with FM.
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Affiliation(s)
- L Meiworm
- Department of Medicine, University Hospitals, Freiburg, Germany
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Schmid A, Jakob E, Berg A, Russmann T, König D, Irmer M, Keul J. Effect of physical exercise and vitamin C on absorption of ferric sodium citrate. Med Sci Sports Exerc 1996; 28:1470-3. [PMID: 8970140 DOI: 10.1097/00005768-199612000-00005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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: 02/03/2023]
Abstract
The effect of physical exercise and vitamin C on iron absorption after oral iron administration was investigated. Eight healthy male subjects without iron deficiency were studied after administration of 100 mg ferric sodium citrate complex, 100 mg ferric sodium citrate complex with 200 mg ascorbic acid, and without iron intake, both under resting conditions and after a 1-h bicycle ergometer test at moderate exercise. Serum concentrations for iron, transferrin, and ferritin were measured before and 30 min, and 1, 2, and 4 h after each administration. Under resting conditions administration of 100 mg ferric sodium citrate led to a significant increase in serum iron concentrations. When ferric sodium citrate was administered with vitamin C, iron values increased significantly further. Ingestion of iron together with physical exercise resulted in a higher serum iron concentration than under resting conditions. The maximum increase, reached after 4 h, was 48.2% with exercise and 8.3% without. In combination with exercise, the addition of 200 mg vitamin C did not further increase serum iron concentration. In conclusion, 1 h of moderate exercise enhanced the rate of iron absorption. Under resting conditions the combination of ferric sodium citrate with vitamin C led to significantly increased postabsorption serum iron concentrations compared with iron administration without vitamin C.
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Affiliation(s)
- A Schmid
- University of Freiburg, Department of Physical Performance Medicine, Germany
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22
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Sifuentes-Osornio J, Jakob E, Clara L, Durlach R, Dain A, Ruìz-Palacios GM, Barkan L, Lamberghini R, Jáuregui A, Villalobos Y, Sáenz-Aguirre C, de la Cabada FJ, Rodríguez-Toledo A, Zavala-Trujillo I, Gamboa MA, Fuentes del Toro S, Froiler C, Maglio F, Quiroga JV, Rojas JJ, Conde-Carmona I. Piperacillin/tazobactam in the treatment of hospitalized patients with urinary tract infections: an open non-comparative and multicentered trial. J Chemother 1996; 8:122-9. [PMID: 8708743 DOI: 10.1179/joc.1996.8.2.122] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 02/01/2023]
Abstract
The aim of this multicentered, prospective and open study was to determine the clinical and bacteriological efficacy and safety of piperacillin/tazobactam (4g/500 mg IV tid) in the treatment of 79 adult patients with complicated urinary tract infections (UTI) requiring hospitalization. Forty-seven women and 32 men (mean age 54.2 years, and range 21-91) from 4 Argentinean and 6 Mexican hospitals were enrolled. Sixty-one clinically and bacteriologically evaluable patients were treated for a mean of 9.1 days (range 5-15). A favorable clinical response was seen in 83.6% and 80% at early and late assessment, respectively. Bacteriological eradication was achieved in 85.3% and 80% at early and late estimation, respectively. Escherichia coli was isolated in 33 cases, Klebsiella pneumoniae in 8, Enterococcus spp. in 7, Proteus mirabilis in 6, Pseudomonas aeruginosa in 3, Enterobacter spp. and Morganella morganii in 2. While 21% of all the clinical isolates were resistant to piperacillin, none of them was initially resistant to piperacillin/tazobactam. However, one female patient with a persistent UTI caused by E. coli developed resistance to piperacillin/tazobactam during treatment. A 64-year-old man with frontal meningioma developed purulent meningitis due to Enterobacter cloacae after neurosurgery. He was initially treated with ciprofloxacin, rifampin and amikacin and because of persistence of fever, he was moved to piperacillin/tazobactam. After 5 days of therapy, he developed coma secondary to intracranial hemorrhage and died. By then, the platelet count was normal (220,000/microliters), but the prothrombin time (19.5 seconds) and the partial thromboplastin time (63 seconds) were significantly prolonged. Our data suggest that piperacillin/tazobactam is a reliable therapy for complicated, non-complicated, community or hospital-acquired UTI.
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Affiliation(s)
- J Sifuentes-Osornio
- Department of Infectious Diseases, Instituto Nacional de la Nutrición Salvador Zubirán, Mexico City, Mexico
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Abstract
A nitrogen analyser based on the Dumas method (LECO FP-428) and equipped with a liquid injector has been tested. The intensive steam production during injection may result in poor nitrogen recoveries for volatile nitrogen compounds such as ethylene diamine. However, recoveries could be improved by slow injection and by filling the combustion tube with Cer(IV)-oxide. For the analysis of milk the instrument was calibrated with NaN3 solutions because their response was found to be less sensitive to burning conditions. Dumas-N and Kjeldahl-N of milk showed good correlation (r = 0.998). However, with the Dumas method about 6.7% (+ 0.035% N) higher nitrogen values were obtained. With a standard deviation of repeatability S(r) = 0.002% N (CVr = 0.33) and a between day reproducibility SD = 0.006% N (CVD = 1.1%) the precision of the Dumas method was similar to that reported for the Kjeldahl method. In order to avoid systematic errors the use of standard milk samples for calibration is recommended. It is concluded that modern instruments using the Dumas method allow precise measurements of nitrogen in milk with a high sample throughout.
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Affiliation(s)
- E Jakob
- Eidgenössische Technische Hochschule Zürich, Labor für Milchwissenschaft, Schweiz
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Lehmann M, Jakob E, Gastmann U, Steinacker JM, Keul J. Unaccustomed high mileage compared to intensity training-related neuromuscular excitability in distance runners. Eur J Appl Physiol Occup Physiol 1995; 70:457-61. [PMID: 7671882 DOI: 10.1007/bf00618498] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The influence of a 4-week unaccustomed average 103% mileage increase (ITV, increase in training volume; n = 8; average baseline mileage 85.9 km.week-1, final mileage 174.6 km.week-1) on performance and neuromuscular excitability (NME) was tested in experienced distance runners and controlled 1 year later by a 4-week unaccustomed average 152% increase in tempo-pace and interval-runs (ITI, increase in training intensity; n = 9; baseline 9 km.week-1 final 22.7 km.week-1) with an average total mileage of 61.7 km.week-1 (week 1) to 84.7 km.week-1 (week 4). Seven athletes participated in ITV as (week 4). Seven athletes participated in ITV as well as in ITI. During incremental treadmill test performance at a lactate concentration of 2 mmol.1-1 (2 LP) increased, and at 4 mmol.1-1 (4 LP) performance did not change, whereas total running distance (TD) during the incremental test decreased in ITV compared to an increase in 2 LP, 4 LP and TD during ITI which may indicate that there was an ITV-related overtraining. The NME of the reference muscles vastus medialis and rectus femoris deteriorated in ITV (day 28 compared to 0) compared to constant values during ITI, reflecting an ITV-related overload of neuromuscular structures.
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Affiliation(s)
- M Lehmann
- University Medical Hospital, Department of Sports Medicine, Freiburg, Germany
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Ferrer C, Jakob E, Pastorino G, Juncos LI. Right-sided bacterial endocarditis due to Flavobacterium odoratum in a patient on chronic hemodialysis. Am J Nephrol 1995; 15:82-4. [PMID: 7872370 DOI: 10.1159/000168806] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [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: 01/27/2023]
Abstract
Bacterial endocarditis, particularly involving the left side, has been shown to occur in patients in regular hemodialysis. We report a case of right-sided endocarditis characterized by a very torpid evolution. Although the diagnosis was suspected early in the course, confirmation was obtained 2 months after the onset. Flavobacterium odoratum was identified in the fourth month of evolution and only after multiple blood cultures had been obtained. We believe the very low infectivity of F. odoratum and its very slow growth in culture media prevented an early diagnosis.
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Affiliation(s)
- C Ferrer
- Instituto Privado de Especialidades Medicas, Cordoba, Argentina
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Sifuentes-Osornio J, Ruíz-Palacios GM, Jakob E, Rojas JJ, Jáuregui A, Villalobos Y. Piperacillin/tazobactam in the treatment of lower respiratory tract infections: an open non-comparative and multicentered trial. Latin American Clinical Research Group. J Chemother 1994; 6:197-203. [PMID: 7983503 DOI: 10.1080/1120009x.1994.11741152] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [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: 01/28/2023]
Abstract
The aim of this study was to determine the clinical and bacteriological efficacy and safety of piperacillin-tazobactam (PT) (4g/500 mg IV tid) in the treatment of 107 adult patients with lower respiratory tract infections (LRTI) requiring hospitalization. Patients included were 66 men and 41 women with a mean age of 55.2 years (range 18-89), enrolled from Mexican (6) and Argentinean (5) hospitals. Ninety-nine clinically evaluable patients (92.5%), 87 with pneumonia and 12 with bronchitis, were treated for a mean period of 9.3 and 7.3 days, respectively. Response to treatment was favorable in 94.3% cases with pneumonia and 100% of cases with bronchitis; 86 cases (80.3%) were bacteriologically evaluable, 77 with pneumonia (eradication 74, persistence 1, superinfection 2), and 9 with bronchitis (eradication in all). Streptococcus pneumoniae was recovered in 24, Klebsiella pneumoniae in 21, Staphylococcus aureus in 8, Haemophilus influenzae in 7, Pseudomonas aeruginosa in 5, Enterobacter spp. in 6, Escherichia coli in 6 and other organisms in 12. Toxicity or intolerance were not observed. Our data suggest that PT is a reliable therapy for severe LRTI.
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Affiliation(s)
- J Sifuentes-Osornio
- Department of Infectious Diseases, Instituto Nacional de la Nutrición Salvador Zubirán, Mexico City, Mexico
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Elmadfa I, Bartens C, Jakob E, König J. Nutritional status and the immune system: fat-soluble vitamins and other nutrients. Bibl Nutr Dieta 1994:136-41. [PMID: 7695565 DOI: 10.1159/000423794] [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] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- I Elmadfa
- Institute of Nutrition, University of Vienna, Austria
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Berg A, Jakob E, Lehmann M, Dickhuth HH, Huber G, Keul J. [Current aspects of modern ergometry]. Pneumologie 1990; 44:2-13. [PMID: 2408033] [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: 12/31/2022]
Affiliation(s)
- A Berg
- Abt. Sport- und Leistungsmedizin an der Medizinischen Universitätsklinik, Universität Freiburg
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Abstract
We examined the catecholamine excretion and its performance-diagnostic relevance in athletes of the German National Team during ski-flying and cross-country skiing. Five athletes were examined during the 1986 World Championship ski-flying competition and eight athletes during a 24-km cross-country qualification test. There is little doubt that the special competitive conditions have considerable influence on the usefulness of these data. We decided to publish the results anyway since the results may expand our knowledge about the performance-diagnostic relevance of catecholamine excretion under competitive conditions. During cross-country skiing, the average noradrenaline elimination (1166 pmol.min-1) was about 150% higher and the average adrenaline elimination (243 pmol.min-1) about 30% lower than during ski-flying. The noradrenaline-adrenaline ratio was about 4.8 in cross-country skiing and 1.3-1.5 in ski-flying. Catecholamine excretion does, as expected, therefore permit differentiation of the various strains on the organism. The impression with respect to performance-diagnostic relevance arises that successful athletes show a more stable and lower excretion of noradrenaline under competitive conditions. This can only be a preliminary statement; it should serve to stimulate discussion and further investigations of the problem.
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Affiliation(s)
- M Lehmann
- Department of Sports and Performance Medicine, University of Freiburg, FRG
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Keul J, Rokitzki L, Jakob E, Stockhausen W. [The effect of temazepam on the functional capacity and metabolic and cardiocirculatory parameters in consideration of the "jet lag" syndrome]. Arzneimittelforschung 1988; 38:919-22. [PMID: 2905133] [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] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
In a double-blind placebo controlled study, 14 male healthy volunteers were examined the morning after they had received an evening dose of 20 mg temazepam (Planum) with regard to functional capacity, cardial, cardiovascular and respiratory regulation as well as neuromuscular excitability and metabolic changes. After being exposed to the bicycle ergometer load, oxygen uptake, carbon dioxide output, glucose and lactate concentration were determined; furthermore the neuromuscular excitability of the musculus vastus medialis, musculus rectus femoris and musculus quadrizeps femoris was estimated. Despite unimportant capacity reductions (p greater than 0.05) concerning the maximum capacity (2.2%) as well as the maximum oxygen uptake (4.3%) under treatment with temazepam, there could not be proved any significant changes regarding cardiopulmonary and metabolic functions. On eastern and western flights, top athletes showed a very fast adaptation to the day-night rhythm without hang-over.
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Affiliation(s)
- J Keul
- Abteilung Sport- und Leistungsmedizin der Medizinischen Universitätsklinik Freiburg/Brsg
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Jakob E, Marx R. [Silanization of the adhesive bridge attachments]. Zahnarztl Prax 1988; 39:124, 126-9. [PMID: 3046175] [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: 01/03/2023]
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Jakob E, Marx R. [Silicoater method for bonded bridgework]. Dtsch Zahnarztl Z 1988; 43:461-4. [PMID: 3044746] [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: 01/03/2023]
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Lehmann M, Jakob E, Spöri U, Bergdolt E, Keul J. [Free and conjugated plasma catecholamines, lactate behavior and oxygen uptake at rest and in staged physical exertion as well as alpha receptor density in intact thrombocytes in trained athletes]. Z Kardiol 1985; 74:32-8. [PMID: 2983504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The influence of chronic static training on free and conjugated plasma catecholamines was investigated in 8 statically trained athletes (21 +/- 2 years of age) at rest and during incremental ergometric cycling. Plasma catecholamines are seen as biochemical indicators of the over-all sympathetic activity. Alpha-2-adrenoreceptors were additionally determined as one parameter of the organism's sensitivity to catecholamines. During modest and heavy exercise, free plasma noradrenaline and adrenaline are comparably low in statically and endurance trained athletes. They are lower than in untrained subjects. During exhaustion, however, free adrenaline responses of the statically trained athletes only amount to 30-50% of the concentrations observed in endurance trained athletes and untrained subjects. Free plasma dopamine and conjugated plasma catecholamines do not show any significant changes during ergometric exercise. Free and conjugated catecholamines correlate positively. Positive correlations are also observed between blood pressure and plasma catecholamines. These correlations however are clearer between conjugated catecholamines and blood pressure. This is also recognizable for the negative correlation between alpha-2-receptor density on intact platelets (1078 +/- 323 binding sites per cell) and conjugated catecholamines. In conclusion, statically trained athletes also show an alteration of sympathetic tone (catecholamines) comparable to that observed in endurance trained athletes. Maximal adrenaline responses however are lower in statically trained athletes than in endurance trained or untrained subjects. The alpha-adrenoreceptor density on intact thrombocytes seems to be increased in statically trained athletes.
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Lehmann M, Schmid P, Bergdolt E, Jakob E, Spöri U, Keul J. [Is the alpha adrenergic receptor density increased in intact thrombocytes in non-isometric trained athletes?]. Klin Wochenschr 1984; 62:992-5. [PMID: 6094909 DOI: 10.1007/bf01728430] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Alpha-adrenoreceptors were determined as an equivalent to 3H-dihydroergocryptine (DHE) specifically bound on intact thrombocytes in five untrained volunteers (I), eight non-staticly trained sportsmen (II), and eight intensively staticly trained athletes (III). Bmax was 933 +/- 363 (I), 982 +/- 373 (II), and 1796 +/- 539 fmol DHE X 10(-9) thrombocytes (III). KD was 1.28 +/- 0.49 (I), 2.94 +/- 1.12 (II), and 3.58 +/- 1.07 nmol X l-1 (III). The number of binding sites per cell amounted to 561 +/- 202 (I), 589 +/- 224 (II), and 1078 +/- 323 (III). The thrombocytes of the staticly trained athletes showed a significantly higher number of binding sites and a slightly higher affinity (KD) than the other groups (p less than 0.01). However, a wide range of overlapping has to be considered. The biologic significance of these results and their transferability to other organs are open at present. It is the question whether an altered adrenoreceptor density may be one factor of a higher prevalence of hypertension in staticly trained athletes on which our research group has reported recently.
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Jakob E. [Family planning--paragraph 218 StGB]. Offentl Gesundheitswes 1981; 43:421-2. [PMID: 6213888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Jakob E, Rubiolo C. [Meningococcal meningitis]. Rev Fac Cien Med Univ Nac Cordoba 1981; 39:24-39. [PMID: 7347869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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Vieira Filho JP, Andrade JA, de Nazareth HR, Jakob E, Donadio N, Alves Junior A. [Case of testicular feminization]. AMB Rev Assoc Med Bras 1970; 16:121-6. [PMID: 5314531] [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: 01/14/2023]
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