14 results on '"C. Koelbel"'
Search Results
2. ANTI-INFECTIVE PROPHYLAXIS WITH ACICLOVIR AND COTRIMOXAZOLE SIGNIFICANTLY REDUCES THE RATE OF INFECTIONS AND THERAPY-ASSOCIATED DEATHS IN ELDERLY PATIENTS WITH DLBCL UNDERGOING R-CHOP IMMUNOCHEMOTHERAPY
- Author
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Bettina Altmann, Viola Poeschel, Michael Hallek, Andreas Neubauer, Andreas Viardot, T. Heintges, J. Amam, Michael Pfreundschuh, Lothar Kanz, Martin Dreyling, Lorenz Truemper, Mathias Haenel, Norbert Schmitz, C. Koelbel, Marita Ziepert, Gerhard Held, and Niels Murawski
- Subjects
Cancer Research ,medicine.medical_specialty ,Oncology ,business.industry ,Internal medicine ,Medicine ,Anti infectives ,Hematology ,General Medicine ,Aciclovir ,business ,Virology ,medicine.drug - Published
- 2017
3. Compiling global name-space parallel loops for distributed execution
- Author
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P. Mehrotra and C. Koelbel
- Subjects
Computer science ,business.industry ,Programming language ,Computer programming ,Parallel computing ,computer.software_genre ,Dead code elimination ,Set (abstract data type) ,Computational Theory and Mathematics ,Intel iPSC ,Hardware and Architecture ,Signal Processing ,Compilation error ,Code (cryptography) ,Compiler ,business ,computer ,Compile time ,High Performance Fortran ,computer.programming_language - Abstract
Compiler support required to allow programmers to express their algorithms using a global name-space is discussed. A general method for the analysis of a high-level source program and its translation into a set of independently executing tasks that communicate using messages is presented. It is shown that if the compiler has enough information, the translation can be carried out at compile time; otherwise; run-time code is generated to implement the required data movement. The analysis required in both situations is described, and the performance of the generated code on the Intel iPSC/2 hypercube is presented. >
- Published
- 1991
4. Session details: Poster abstracts
- Author
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C. Koelbel
- Subjects
medicine.medical_specialty ,medicine ,Medical physics ,Session (computer science) ,Psychology - Published
- 2007
5. Parallel Loops on Distributed Machines
- Author
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H. Berryman, C. Koelbel, P. Mehrotra, and Joel H. Saltz
- Subjects
Instruction prefetch ,Scheme (programming language) ,Distributed design patterns ,Loop (graph theory) ,Computer science ,Distributed computing ,Distributed data structures ,Distributed memory ,Workload ,Parallel computing ,Data structure ,computer ,computer.programming_language - Abstract
Any programming environment for distributed memory machines that allows the user to specify pdwallel do loops over globally defined data structures requires optimizations that go beyond the specification of Lrppropriate data and workload partitionings. In this paper, we consider optimizations that are required for efficient execution of a code segment that consists of pmallel loops over distributed data Structures. On distributed memory machines it is typically very expensive tci fetch individual data elements. Instead, before a parallirl loop executes, it is desirable to prefetch all off-processor data required in the loop. We specify a scheme for s boring copies of fetched data along with a scheme for accessing copies of off-processor data during the computafJ ion of the loop. The performance of such optimizations rm the iPSC/2 and the NCUBE is also presented.
- Published
- 2005
6. Echinococcus multilocularis infection and TNF inhibitor treatment in a patient with rheumatoid arthritis
- Author
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V. Krenn, D. Ockert, Stefan Markus Weiner, H. G. Hoffmann, C. Koelbel, and K. Hinkeldey
- Subjects
Pathology ,medicine.medical_specialty ,biology ,business.industry ,medicine.medical_treatment ,Immunology ,Arthritis ,biology.organism_classification ,medicine.disease ,Echinococcosis ,TNF inhibitor ,Etanercept ,Echinococcus ,Rheumatology ,Granuloma ,Rheumatoid arthritis ,medicine ,Immunology and Allergy ,Tumor necrosis factor alpha ,business ,medicine.drug - Abstract
Sir, TNFa blocking agents should not be used in patients with high risk of infections whose containment is macrophage/ granuloma dependent, such as mycobacteria, coccidiomycosis or histoplasmosis [1]. In echinococcosis, Th1 cytokines are also important for host defense [2, 3]. It has been shown that TNFa mRNA is located in macrophages in the periparasitic area of the liver [4] leading to the development of an intrahepatic granuloma surrounding the parasite tissue [5]. Otherwise, antibody production in early infection may be stimulated by a T-cell independent mechanism [6]. However, to our best knowledge, cases of the evolution of echinococcosis during TNF inhibitor treatment have not been reported so far. We present a patient with rheumatoid arthritis (RA), who developed echinococcus abscess for
- Published
- 2010
7. [Intracutaneous tuberculin test using the Mendel-Mantoux technique. Tuberculin reactivity among inpatients in a pneumology department]
- Author
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A, Elmer, C S, Kortsik, U, Pies, C, Koelbel, and P, Albrecht
- Subjects
Adult ,Aged, 80 and over ,Lung Diseases ,Male ,Inpatients ,Tuberculin Test ,Hospital Departments ,Guidelines as Topic ,Middle Aged ,United States ,Risk Factors ,Prevalence ,Humans ,Tuberculosis ,Female ,Centers for Disease Control and Prevention, U.S ,Tuberculosis, Pulmonary ,Societies, Medical ,Aged - Abstract
Detection of latent tuberculosis infection is an important step in the control of tuberculosis. The tuberculin skin test is the only proven method for identifying tuberculosis infection in patients who do not have tuberculosis disease. The prevalence of tuberculosis infection among hospitalized patients in a pneumological department of an inner-city hospital was evaluated, using the intradermal tuberculin skin test (Mantoux technique). Interpretation of the Mantoux test was based on the size of induration in millimeters and the individual risk profile of the patients, according to the guidelines of the American Thoracic Society and the Centers for Disease Control, revised in 1989. Of 697 tested patients, 252 showed test results consistent with tuberculosis infection (36.2%). 55 of these 697 patients had active tuberculosis disease or a prior history of tuberculosis (7.9%). A positive tuberculin skin test was found in 197 of 642 patients (30.7%) with a diagnosis different from tuberculosis (COPD, pneumonia, cancer and others). In our study, the sensitivity of the tuberculin skin test for active tuberculosis infection was 95%. The present study revealed a high prevalence of tuberculosis infection among hospitalized patients in a pneumological department. Further studies are needed to assess the usefulness of routine tuberculin skin testing in hospitalized populations.
- Published
- 2000
8. Supporting shared data structures on distributed memory architectures
- Author
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Piyush Mehrotra, C. Koelbel, and J. Van Rosendale
- Subjects
Distributed shared memory ,business.industry ,Computer science ,Distributed computing ,Computer programming ,Time-sharing ,Uniform memory access ,Overlay ,Parallel computing ,Data structure ,Computer Graphics and Computer-Aided Design ,Memory map ,Memory management ,Shared memory ,Distributed memory ,Hypercube ,Data diffusion machine ,business ,Software - Abstract
Programming nonshared memory systems is more difficult than programming shared memory systems, since there is no support for shared data structures. Current programming languages for distributed memory architectures force the user to decompose all data structures into separate pieces, with each piece “owned” by one of the processors in the machine, and with all communication explicitly specified by low-level message-passing primitives. This paper presents a new programming environment for distributed memory architectures, providing a global name space and allowing direct access to remote parts of data values. We describe the analysis and program transformations required to implement this environment, and present the efficiency of the resulting code on the NCUBE/7 and IPSC/2 hypercubes.
- Published
- 1990
9. Action of neurotensin on meal-stimulated gastric acid secretion in the dog
- Author
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Viktor E. Eysselein, W. H. Hesse, Harald Goebell, W. Niebel, G. A. Eberlein, and C. Koelbel
- Subjects
medicine.medical_specialty ,Radioimmunoassay ,Neuropeptide ,Peptide hormone ,Biology ,complex mixtures ,digestive system ,Gastric Acid ,chemistry.chemical_compound ,Dogs ,Internal medicine ,Gastrins ,medicine ,Animals ,Chromatography, High Pressure Liquid ,Neurotensin ,Gastrin ,musculoskeletal, neural, and ocular physiology ,Stomach ,digestive, oral, and skin physiology ,Gastroenterology ,Pentagastrin ,medicine.anatomical_structure ,Endocrinology ,chemistry ,Gastrointestinal hormone ,Food ,Peptones ,Gastric acid ,hormones, hormone substitutes, and hormone antagonists ,medicine.drug - Abstract
In six to nine mongrel dogs the effect of graded doses of intravenous neurotensin (188, 375, 750, and 1500 pmol/kg h) on acid secretion basally or stimulated by distention (by isotonic glucose), peptone (0.5, 1, and 4 g%), and pentagastrin was studied. Neurotensin did not affect acid secretion basally, stimulated by distention, or the maximal peptone dose. However, when submaximal doses (0.5 and 1 g%) of peptone were instilled in the stomach, neurotensin stimulated the secretory response to intragastric peptone. This effect was observed in doses of intravenous neurotensin which mimicked circulating neurotensin concentrations after a standard test meal. Thus, neurotensin could be considered a physiologic stimulant of acid secretion when protein is present in the stomach. The mechanism for this action of neurotensin is unknown but could be partly explained by an enhanced release of gastrin. The potentiating effect of neurotensin on peptone-stimulated acid secretion could play a major role in gastric secretory function of the dog.
- Published
- 1990
10. Development of tandem antigen capture ELISAs measuring QSOX1 isoforms in plasma and serum.
- Author
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Koelbel C, Ruiz Y, Wan Z, Wang S, Ho T, and Lake D
- Subjects
- Humans, Adult, Protein Isoforms, Antibodies, Monoclonal chemistry, Enzyme-Linked Immunosorbent Assay, Oxidoreductases Acting on Sulfur Group Donors, Neoplasms, Heart Failure
- Abstract
QSOX1 is a sulfhydryl oxidase that has been identified as a potential biomarker in multiple cancer types as well as acute decompensated heart failure. Three anti-QSOX1 monoclonal antibodies (mAbs) were generated: 2F1, 3A10, and 56-3. MAbs 2F1 and 3A10 were generated against the short isoform of recombinant QSOX1 (rQSOX1-S), and mAb 56-3 was generated against a peptide (NEQEQPLGQWHLS) from the long isoform of QSOX1 (QSOX1-L). Using these mAbs, tandem antigen capture ELISAs were developed to quantify both short and long isoforms of QSOX1 (Total QSOX1 ELISA) and QSOX1-L (QSOX1-L ELISA) in serum and plasma samples. The Total QSOX1 ELISA pairs mAbs 2F1 and 3A10 and has a limit of detection of 109.5 pM, while the QSOX1-L ELISA pairs mAbs 2F1 and 56-3 and has a limit of detection of 10 pM. The levels of total QSOX1 and QSOX1-L were measured in a cohort of paired sera and plasma from 61 donors ≥40 years old and 15 donors <40 years old. No difference in QSOX1 levels was detected between QSOX1-L and QSOX1-S in serum, but the mean concentration of QSOX1-L was found to be 3.21 nM in serum and 5.63 nM in plasma (**p = 0.006). Our tandem ELISAs demonstrate the wide range of concentrations of QSOX1-L and QSOX1-S among individual serum and plasma samples. Since the epitope of mAb 2F1 was mapped to the first CxxC motif at residues C70 and C73 and mAb 56-3 was generated against NEQEQPLGQWHLS in QSOX1-L, our findings support previous research which suggested that QSOX1-L is secreted from cells despite a putative transmembrane domain. The ELISAs reported here may be a useful tool for investigating QSOX1 isoforms as potential biomarkers in cancer and/or heart failure., (Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
11. Echinococcus multilocularis infection and TNF inhibitor treatment in a patient with rheumatoid arthritis.
- Author
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Weiner SM, Krenn V, Koelbel C, Hoffmann HG, Hinkeldey K, and Ockert D
- Subjects
- Animals, Antirheumatic Agents adverse effects, Echinococcosis, Hepatic complications, Etanercept, Humans, Male, Middle Aged, Radiography, Receptors, Tumor Necrosis Factor, Arthritis, Rheumatoid drug therapy, Arthritis, Rheumatoid immunology, Arthritis, Rheumatoid parasitology, Echinococcosis, Hepatic diagnostic imaging, Echinococcosis, Hepatic immunology, Echinococcus multilocularis isolation & purification, Immunoglobulin G adverse effects, Tumor Necrosis Factor-alpha antagonists & inhibitors
- Published
- 2011
- Full Text
- View/download PDF
12. [Intracutaneous tuberculin test using the Mendel-Mantoux technique. Tuberculin reactivity among inpatients in a pneumology department].
- Author
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Elmer A, Kortsik CS, Pies U, Koelbel C, and Albrecht P
- Subjects
- Adult, Aged, Aged, 80 and over, Centers for Disease Control and Prevention, U.S., Female, Guidelines as Topic, Hospital Departments, Humans, Lung Diseases complications, Male, Middle Aged, Prevalence, Risk Factors, Societies, Medical, Tuberculin Test, United States, Inpatients, Tuberculosis epidemiology, Tuberculosis, Pulmonary epidemiology
- Abstract
Detection of latent tuberculosis infection is an important step in the control of tuberculosis. The tuberculin skin test is the only proven method for identifying tuberculosis infection in patients who do not have tuberculosis disease. The prevalence of tuberculosis infection among hospitalized patients in a pneumological department of an inner-city hospital was evaluated, using the intradermal tuberculin skin test (Mantoux technique). Interpretation of the Mantoux test was based on the size of induration in millimeters and the individual risk profile of the patients, according to the guidelines of the American Thoracic Society and the Centers for Disease Control, revised in 1989. Of 697 tested patients, 252 showed test results consistent with tuberculosis infection (36.2%). 55 of these 697 patients had active tuberculosis disease or a prior history of tuberculosis (7.9%). A positive tuberculin skin test was found in 197 of 642 patients (30.7%) with a diagnosis different from tuberculosis (COPD, pneumonia, cancer and others). In our study, the sensitivity of the tuberculin skin test for active tuberculosis infection was 95%. The present study revealed a high prevalence of tuberculosis infection among hospitalized patients in a pneumological department. Further studies are needed to assess the usefulness of routine tuberculin skin testing in hospitalized populations.
- Published
- 2000
- Full Text
- View/download PDF
13. Action of neurotensin on meal-stimulated gastric acid secretion in the dog.
- Author
-
Eysselein VE, Hesse WH, Eberlein GA, Koelbel C, Niebel W, and Goebell H
- Subjects
- Animals, Chromatography, High Pressure Liquid, Dogs, Gastrins analysis, Peptones pharmacology, Radioimmunoassay, Food, Gastric Acid metabolism, Neurotensin physiology
- Abstract
In six to nine mongrel dogs the effect of graded doses of intravenous neurotensin (188, 375, 750, and 1500 pmol/kg h) on acid secretion basally or stimulated by distention (by isotonic glucose), peptone (0.5, 1, and 4 g%), and pentagastrin was studied. Neurotensin did not affect acid secretion basally, stimulated by distention, or the maximal peptone dose. However, when submaximal doses (0.5 and 1 g%) of peptone were instilled in the stomach, neurotensin stimulated the secretory response to intragastric peptone. This effect was observed in doses of intravenous neurotensin which mimicked circulating neurotensin concentrations after a standard test meal. Thus, neurotensin could be considered a physiologic stimulant of acid secretion when protein is present in the stomach. The mechanism for this action of neurotensin is unknown but could be partly explained by an enhanced release of gastrin. The potentiating effect of neurotensin on peptone-stimulated acid secretion could play a major role in gastric secretory function of the dog.
- Published
- 1990
- Full Text
- View/download PDF
14. Neuropeptides, inflammation, and motility.
- Author
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Mayer EA, Raybould H, and Koelbel C
- Subjects
- Animals, Humans, Intestinal Mucosa innervation, Substance P physiology, Colitis, Ulcerative etiology, Crohn Disease etiology, Gastrointestinal Motility, Neuropeptides physiology
- Abstract
Neurogenic inflammation is a reaction which includes vasodilation, plasma extravasation, and smooth muscle contraction elicited by activation of and release of mediators from unmyelinated afferent nerve endings. Further release of inflammatory mediators follows activation of axon collaterals associated with these afferent nerve endings as axon reflexes. Substance P, somatostatin, vasoactive intestinal polypeptide, and calcitonin gene-related peptide are candidate mediators. Recent evidence suggests that several of these peptides may be colocalized either with one or more other peptides or with acetylcholine or noradrenalin. Communicating pathways exist between nerves within the mucosa and the muscle layers. Both long and short visceral reflexes occur. Inflammatory, mechanical, or chemical stimuli reaching the mucosa may release peptides from peripheral nerve endings. Thus neurogenic inflammation may be an important factor in inflammatory bowel disease.
- Published
- 1988
- Full Text
- View/download PDF
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