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Gál B, Varga-Kugler R, Ihász K, Kaszab E, Farkas S, Marton S, Martella V, Bányai K. A Snapshot on the Genomic Epidemiology of Turkey Reovirus Infections, Hungary. Animals (Basel) 2023; 13:3504. [PMID: 38003122 PMCID: PMC10668827 DOI: 10.3390/ani13223504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/29/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023] Open
Abstract
Reovirus infections in turkeys are associated with arthritis and lameness. Viral genome sequence data are scarce, which makes an accurate description of the viral evolution and epidemiology difficult. In this study, we isolated and characterized turkey reoviruses from Hungary. The isolates were identified in 2016; these isolates were compared with earlier Hungarian turkey reovirus strains and turkey reoviruses isolated in the 2010s in the United States. Gene-wise sequence and phylogenetic analyses identified the cell-receptor binding protein and the main neutralization antigen, σC, to be the most conserved. The most genetically diverse gene was another surface antigen coding gene, μB. This gene was shown to undergo frequent reassortment among chicken and turkey origin reoviruses. Additional reassortment events were found primarily within members of the homologous turkey reovirus clade. Our data showed evidence for low variability among strains isolated from independent outbreaks, a finding that suggests a common source of turkey reoviruses in Hungarian turkey flocks. Given that commercial vaccines are not available, identification of the source of these founder virus strains would permit a more efficient prevention of disease outbreaks before young birds are settled to fattening facilities.
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Affiliation(s)
- Bence Gál
- Intervet Hungária Kft, Lechner Odon Fasor 10/b, H-1095 Budapest, Hungary;
| | - Renáta Varga-Kugler
- Veterinary Medical Research Institute, Hungária krt. 21, H-1143 Budapest, Hungary; (R.V.-K.); (K.I.); (E.K.); (S.M.)
- National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Hungária krt. 21, H-1143 Budapest, Hungary
| | - Katalin Ihász
- Veterinary Medical Research Institute, Hungária krt. 21, H-1143 Budapest, Hungary; (R.V.-K.); (K.I.); (E.K.); (S.M.)
| | - Eszter Kaszab
- Veterinary Medical Research Institute, Hungária krt. 21, H-1143 Budapest, Hungary; (R.V.-K.); (K.I.); (E.K.); (S.M.)
- National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Hungária krt. 21, H-1143 Budapest, Hungary
- Institute of Metagenomics, University of Debrecen, Nagyerdei krt. 98, H-4032 Debrecen, Hungary
| | - Szilvia Farkas
- Department of Obstetrics and Food Animal Medicine Clinic, University of Veterinary Medicine, István utca 2, H-1078 Budapest, Hungary;
| | - Szilvia Marton
- Veterinary Medical Research Institute, Hungária krt. 21, H-1143 Budapest, Hungary; (R.V.-K.); (K.I.); (E.K.); (S.M.)
- National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Hungária krt. 21, H-1143 Budapest, Hungary
| | - Vito Martella
- Department of Veterinary Medicine, University of Bari, Aldo Moro, S.P. per Casamassima km 3, 70010 Valenzano, Italy;
| | - Krisztián Bányai
- Veterinary Medical Research Institute, Hungária krt. 21, H-1143 Budapest, Hungary; (R.V.-K.); (K.I.); (E.K.); (S.M.)
- National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Hungária krt. 21, H-1143 Budapest, Hungary
- Department of Pharmacology and Toxicology, University of Veterinary Medicine, István utca 2, H-1078 Budapest, Hungary
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2
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Gál B, Varga-Kugler R, Ihász K, Kaszab E, Domán M, Farkas S, Bányai K. Marked Genotype Diversity among Reoviruses Isolated from Chicken in Selected East-Central European Countries. Animals (Basel) 2023; 13:2137. [PMID: 37443935 DOI: 10.3390/ani13132137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 06/22/2023] [Accepted: 06/25/2023] [Indexed: 07/15/2023] Open
Abstract
The concern that the vaccines currently used against Avian orthoreovirus (ARV) infections are less efficient in the field justifies the need for the close monitoring of circulating ARV strains. In this study, we collected necropsy samples from various chicken breeds and tested for ARV by virus isolation, RT-PCR assay and sequence analysis. ARVs were isolated from birds showing runting-stunting syndrome, uneven growth, lameness or increased mortality, with relative detection rates of 38%, 35%, 6% and 25%, respectively. Partial σC gene sequences were determined for nearly 90% of ARV isolates. The isolates could be classified into one of the major genetic clusters. Interestingly, cluster 2 and cluster 5 were isolated from vaccinated broiler breeders, while clusters 1 to 4 were isolated from unvaccinated broilers. The isolates shared less than 75% amino acid identities with the vaccine strains (range, 44.3-74.6%). This study reaffirms the global distribution of the major genetic clusters of ARVs in chicken. The diversity of ARV strains isolated from unvaccinated broilers was greater than those detected from vaccinated animals, however, the relative importance of passive and active immunity on the selection of novel strains in different chicken breeds needs to be better understood.
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Affiliation(s)
- Bence Gál
- Intervet Hungária Kft, Lechner Ödön fasor 10/b, H-1095 Budapest, Hungary
| | - Renáta Varga-Kugler
- Veterinary Medical Research Institute, Hungária krt. 21, H-1143 Budapest, Hungary
- National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Hungária krt. 21, H-1143, Budapest, Hungary
| | - Katalin Ihász
- Veterinary Medical Research Institute, Hungária krt. 21, H-1143 Budapest, Hungary
| | - Eszter Kaszab
- Veterinary Medical Research Institute, Hungária krt. 21, H-1143 Budapest, Hungary
- National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Hungária krt. 21, H-1143, Budapest, Hungary
| | - Marianna Domán
- Veterinary Medical Research Institute, Hungária krt. 21, H-1143 Budapest, Hungary
- National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Hungária krt. 21, H-1143, Budapest, Hungary
| | - Szilvia Farkas
- Department of Obstetrics and Food Animal Medicine Clinic, University of Veterinary Medicine, István utca 2, H-1078 Budapest, Hungary
| | - Krisztián Bányai
- Veterinary Medical Research Institute, Hungária krt. 21, H-1143 Budapest, Hungary
- National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Hungária krt. 21, H-1143, Budapest, Hungary
- Department of Pharmacology and Toxicology, University of Veterinary Medicine, István utca 2, H-1078 Budapest, Hungary
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Varga-Kugler R, Ihász K, Marton S, Kaszab E, Marschang RE, Farkas S, Bányai K. Genetic diversity among reptilian orthoreoviruses isolated from pet snakes and lizards. Front Vet Sci 2023; 10:1058133. [PMID: 36816198 PMCID: PMC9932320 DOI: 10.3389/fvets.2023.1058133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 01/06/2023] [Indexed: 02/05/2023] Open
Abstract
Reovirus infections in reptiles are frequently detected and associated with various clinical diseases; yet, our knowledge about their genetic diversity and evolutionary relationships remains limited. In this study, we characterize at the genomic level five reptile origin orthoreovirus strains isolated from exotic snakes and lizards in Hungary and Germany. The genomic organization of the study strains was similar to that of the representative strains of reptile origin reoviruses belonging to species Reptilian orthoreovirus and Testudine orthoreovirus. Additionally, all five study strains clustered with the bush viper origin reference Reptilian orthoreovirus strain, 47/02. The nucleotide sequence divergence among strains fell from 56.64 to 99.36%. Based on genome segment constellations two well separated groups were observed, which may represent two genetic lineages of reptilian orthoreoviruses we tentatively referred here as genogroups, classifying two squamata origin strains with available whole genome sequences into genogroup I (GGI) and four strains into genogroup II (GGII). The representative GGI and GGII Reptilian orthoreovirus strains are characterized by moderate-to-high nucleotide and amino acid similarities within genogroups (range, 69.45 to 99.36% and 74.64 to 100.00%), whereas lower nucleotide and amino acid similarities (range, 56.64 to 77.24% and 54.53 to 93.85%) and different structures of the bicistronic S1 segment were found between genogroups. Further studies are needed to explore the genomic diversity among reptilian reoviruses of squamata origin; this would be critical to establish a robust classification system for these viruses and to see if interaction among members of distinct lineages may result in viable progenies with novel genetic features.
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Affiliation(s)
- Renáta Varga-Kugler
- Veterinary Medical Research Institute, Budapest, Hungary,National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Budapest, Hungary
| | - Katalin Ihász
- Veterinary Medical Research Institute, Budapest, Hungary
| | - Szilvia Marton
- Veterinary Medical Research Institute, Budapest, Hungary,National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Budapest, Hungary
| | - Eszter Kaszab
- Veterinary Medical Research Institute, Budapest, Hungary,National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Budapest, Hungary
| | | | - Szilvia Farkas
- Department of Obstetrics and Food Animal Medicine Clinic, University of Veterinary Medicine, Budapest, Hungary
| | - Krisztián Bányai
- Veterinary Medical Research Institute, Budapest, Hungary,National Laboratory for Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, Budapest, Hungary,Department of Pharmacology and Toxicology, University of Veterinary Medicine, Budapest, Hungary,*Correspondence: Krisztián Bányai ✉
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Kovács E, Varga-Kugler R, Mató T, Homonnay Z, Tatár-Kis T, Farkas S, Kiss I, Bányai K, Palya V. Identification of the main genetic clusters of avian reoviruses from a global strain collection. Front Vet Sci 2023; 9:1094761. [PMID: 36713877 PMCID: PMC9878682 DOI: 10.3389/fvets.2022.1094761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 12/28/2022] [Indexed: 01/13/2023] Open
Abstract
Introduction Avian reoviruses (ARV), an important pathogen of poultry, have received increasing interest lately due to their widespread occurrence, recognized genetic diversity, and association to defined disease conditions or being present as co-infecting agents. The efficient control measures require the characterization of the available virus strains. Methods The present study describes an ARV collection comprising over 200 isolates from diagnostic samples collected over a decade from 34 countries worldwide. One hundred and thirty-six ARV isolates were characterized based on σC sequences. Results and discussion The samples represented not only arthritis/tenosynovitis and runting-stunting syndrome, but also respiratory symptoms, egg production problems, and undefined disease conditions accompanied with increased mortality, and were obtained from broiler, layer or breeder flocks. In 31 percent of the cases other viral or bacterial agents were demonstrated besides ARV. The most frequent co-infectious agent was infectious bronchitis virus followed by infectious bursal disease virus and adenoviruses. All isolates could be classified in one of the major genetic clusters, although we observed marked discrepancies in the genotyping systems currently in use, a finding that made genotype assignment challenging. Reovirus related clinical symptoms could not be unequivocally connected to any particular virus strains belonging to a specific genetic group, suggesting the lack of strict association between disease forms of ARV infection and the investigated genetic features of ARV strains. Also, large genetic differences were seen between field and vaccine strains. The presented findings reinforce the need to establish a uniform, widely accepted molecular classification scheme for ARV and further, highlight the need for ARV strain identification to support more efficient control measures.
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Affiliation(s)
| | | | | | | | | | - Szilvia Farkas
- Veterinary Medical Research Institute, Budapest, Hungary,Department of Obstetrics and Food Animal Medicine Clinic, University of Veterinary Medicine, Budapest, Hungary
| | - István Kiss
- Ceva-Phylaxia Ltd., Budapest, Hungary,*Correspondence: István Kiss ✉
| | - Krisztián Bányai
- Veterinary Medical Research Institute, Budapest, Hungary,Department of Pharmacology and Toxicology, University of Veterinary Medicine, Budapest, Hungary
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Volland H, Ballesté-Delpierre C, Szabó D, Gonzalez C, Takissian J, Aszalos AZ, Ostorhazi E, Farkas S, Kamotsay K, Rosenmoller M, Stankov-Pugès M, Francius L, Boutigny L, Sivan V, Simon S, Gelhaye S, Bosch J, Vila J, Naas T. Rapid detection of CTX-M-type ESBLs and carbapenemases directly from biological samples using the BL-DetecTool. J Antimicrob Chemother 2022; 77:2867-2875. [PMID: 35978470 DOI: 10.1093/jac/dkac264] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 07/15/2022] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Lateral flow immunoassays (LFIA) have shown their usefulness for detecting CTX-M- and carbapenemase-producing Enterobacterales (CPEs) in bacterial cultures. Here, we have developed and validated the BL-DetecTool to detect CTX-M enzymes and carbapenemases directly from clinical samples. METHODS The BL-DetecTool is an LFIA that integrates an easy sample preparation device named SPID (Sampling, Processing, Incubation and Detection). It was evaluated in three University hospitals on urine, blood culture (BC) and rectal swab (RS) specimens either of clinical origin or on spiked samples. RS evaluation was done directly and after a 24 h enrichment step. RESULTS The CTX-M BL-DetecTool was tested on 485 samples (154 BC, 150 urines, and 181 RS) and revealed a sensitivity and specificity of 97.04% (95% CI 92.59%-99.19%) and 99.43% (95% CI 97.95%-99.93%), respectively. Similarly, the Carba5 BL-DetecTool was tested on 382 samples (145 BC, 116 urines, and 121 RS) and revealed a sensitivity and specificity of 95.3% (95% CI 89.43%-98.47%) and 100% (95% CI 98.67%-100%), respectively. While with the Carba5 BL-DetecTool five false negatives were observed, mostly in RS samples, with the CTX-M BL-DetecTool, in addition to four false-negatives, two false-positives were also observed. Direct testing of RS samples revealed a sensitivity of 78% and 86% for CTX-M and carbapenemase detection, respectively. CONCLUSIONS BL-DetecTool showed excellent biological performance, was easy-to-use, rapid, and could be implemented in any microbiology laboratory around the world, without additional equipment, no need for electricity, nor trained personnel. It offers an attractive alternative to costly molecular methods.
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Affiliation(s)
- Hervé Volland
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, 91191 Gif-sur-Yvette, France
| | - Clara Ballesté-Delpierre
- University of Barcelona, Institute for Global Health (ISGlobal), Hospital Clínic - Barcelona, Spain
| | - Dóra Szabó
- Semmelweis University, Institute of Medical Microbiology, Budapest, Hungary
| | - Camille Gonzalez
- Assistance Publique-Hôpitaux de Paris, Hôpital Bicêtre, Bacteriology-Hygiene unit, Le Kremlin-Bicêtre, France
| | - Julie Takissian
- Assistance Publique-Hôpitaux de Paris, Hôpital Bicêtre, Bacteriology-Hygiene unit, Le Kremlin-Bicêtre, France
| | - Albert Zoltan Aszalos
- Semmelweis University, Health Services Management Training Centre, Budapest, Hungary
| | - Eszter Ostorhazi
- Semmelweis University, Institute of Medical Microbiology, Budapest, Hungary
| | - Szilvia Farkas
- Semmelweis University, Health Services Management Training Centre, Budapest, Hungary
| | - Katalin Kamotsay
- Central Microbiology Laboratory, Central Hospital of Southern Pest National Institute of Hematology and Infectious Disease, Budapest, Hungary
| | | | | | | | | | - Virginie Sivan
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, 91191 Gif-sur-Yvette, France
| | - Stéphanie Simon
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, 91191 Gif-sur-Yvette, France
| | - Stéphanie Gelhaye
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, 91191 Gif-sur-Yvette, France
| | - Jordi Bosch
- University of Barcelona, Institute for Global Health (ISGlobal), Hospital Clínic - Barcelona, Spain.,University of Barcelona, Hospital Clínic, Department of Clinical Microbiology - CDB, Barcelona, Spain
| | - Jordi Vila
- University of Barcelona, Institute for Global Health (ISGlobal), Hospital Clínic - Barcelona, Spain.,University of Barcelona, Hospital Clínic, Department of Clinical Microbiology - CDB, Barcelona, Spain.,CIBER de Enfermedades Infecciosas (CIBERINFEC), ISCIII, Madrid, Spain
| | - Thierry Naas
- Assistance Publique-Hôpitaux de Paris, Hôpital Bicêtre, Bacteriology-Hygiene unit, Le Kremlin-Bicêtre, France.,Team 'Resist' UMR1184 'Immunology of Viral, Auto-Immune, Hematological and Bacterial diseases (IMVA-HB)', INSERM, University Paris-Saclay, CEA, LabEx LERMIT, Faculty of Medicine, Le Kremlin-Bicêtre, France.,Associated French National Reference Center for Antibiotic Resistance: Carbapenemase-producing Enterobacterales, Le Kremlin-Bicêtre, France
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Andric M, Kalff JC, Schwenk W, Farkas S, Hartwig W, Türler A, Croner R. [Recommendations on treatment of acute appendicitis : Recommendations of an expert group based on the current literature]. Chirurg 2020; 91:700-711. [PMID: 32747976 DOI: 10.1007/s00104-020-01237-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The paradigm shift in the treatment concept for acute appendicitis is currently the subject of intensive discussions. The diagnosis and differentiation of an uncomplicated from a complicated appendicitis as well as the selection of an adequate treatment is very challenging, especially since nonoperative treatment models have been published. The laparoscopic appendectomy is still the standard for most cases. Guidelines for the treatment of acute appendicitis do not exist in Germany. Therefore, a group of experts elaborated 21 recommendations on the treatment of acute appendicitis after 3 meetings. After initial definition of population, intervention, comparison and outcome (PICO) questions, recommendations have been finalized through the Delphi voting system. The results were evaluated according to the current literature. The aim of this initiative was to define a basic support for decision making in the clinical routine for treatment of acute appendicitis.
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Affiliation(s)
- M Andric
- Klinik für Allgemein‑, Viszeral‑, Gefäß- und Transplantationschirurgie, Universitätsklinikum Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland.
| | - J C Kalff
- Klinik und Poliklinik für Allgemein‑, Viszeral‑, Thorax- und Gefäßchirurgie, Universitätsklinikum Bonn, Bonn, Deutschland
| | - W Schwenk
- Allgemein‑, Viszeral- und Gefäßchirurgie, Städtisches Klinikum Solingen, Solingen, Deutschland
| | - S Farkas
- Allgemein- und Viszeralchirurgie, St. Josefs-Hospital Wiesbaden, Wiesbaden, Deutschland
| | - W Hartwig
- Klinik für Allgemein‑, Viszeral- und Onkologische Chirurgie, Evangelisches Krankenhaus Düsseldorf, Düsseldorf, Deutschland
| | - A Türler
- Allgemein- und Viszeralchirurgie, Johanniter Kliniken Bonn, Bonn, Deutschland
| | - R Croner
- Klinik für Allgemein‑, Viszeral‑, Gefäß- und Transplantationschirurgie, Universitätsklinikum Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland
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Abstract
BACKGROUND The 3D laparoscopy is currently under intensive discussion. At the moment the majority of newly acquired laparoscopy systems include the 3D technique. New 4K systems, which will be offered in combination with 3D, are complicating the decision-making when buying new laparoscopic systems. The aim of the article is to show the advantages and possible limitations of 3D laparoscopy. Furthermore, the position of 3D laparoscopy in the current video market is evaluated. MATERIAL AND METHODS This study was based on an up to date literature search in PubMed. Concerning the question whether the 3D is replacing the 2D laparoscopy, observations from the industry and a personal evaluation were included in the analysis. RESULTS The current studies show clear advantages of 3D laparoscopy concerning operation time, efficiency and workload. A major proportion of the studies were conducted on simulation trainers; however, some clinical trials also confirmed these results. The learning curve in laparoscopic surgery is clearly improved with the 3D technique and 3D also seems be useful for operations by experts. The limitation is that not every surgeon can see three dimensionally. Furthermore, the set-up in the operation room needs to be optimized so that a 3D system can be successfully implemented with the nursing staff and side effects, such as exhaustion, dizziness or headache can be prevented. CONCLUSION The choice of video system will depend on the personal interest of the surgeon and the ability to see 3D. It can be assumed that the majority of the systems will include 3D laparoscopy but 2D laparoscopy will not be completely replaced. A dynamic development of 3D in association with 4K and robotics can be expected.
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Affiliation(s)
- A Buia
- Klinik für Allgemein‑, Viszeral- und Thoraxchirurgie, Asklepios Kliniken Langen, Röntgenstr. 20, 63225, Langen, Deutschland
| | - S Farkas
- Klinik für Allgemein- und Viszeralchirurgie, St. Josefs-Hospital Wiesbaden, Beethovenstraße 20, 65189, Wiesbaden, Deutschland.
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Deres L, Szabadfi K, Eros K, Wilhelm M, Cseko C, Matuz J, Farkas S, Gabriel R, Toth K, Halmosi R. P6050Progression of vascular changing and hypertensive retinopathy during bradykinin B1 receptor antagonist treatment in SHR rats. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Marton S, Ihász K, Lengyel G, Farkas S, Dán Á, Paulus P, Bányai K, Fehér E. Ubiquiter circovirus sequences raise challenges in laboratory diagnosis: the case of honey bee and bee mite, reptiles, and free living amoebae. Acta Microbiol Immunol Hung 2015; 62:57-73. [PMID: 25823454 DOI: 10.1556/amicr.62.2015.1.5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [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: 11/19/2022]
Abstract
Circoviruses of pigs and birds are established pathogens, however, the exact role of other, recently described circoviruses and circovirus-like viruses remains to be elucidated. The aim of this study was the detection of circoviruses in neglected host species, including honey bees, exotic reptiles and free-living amoebae by widely used broad-spectrum polymerase chain reaction (PCR) assays specific for the replication initiation protein coding gene of these viruses. The majority of sequences obtained from honey bees were highly similar to canine and porcine circoviruses, or, were distantly related to dragonfly cycloviruses. Other rep sequences detected in some honey bees, reptiles and amoebae showed similarities to various rep sequences deposited in the GenBank. Back-to-back PCR primers designed for the amplification of whole viral genomes failed to work that suggested the existence of integrated rep-like elements in many samples. Rolling circle amplification and exonuclease treatment confirmed the absence of small circular DNA genomes in the specimens analysed. In case of honey bees Varroa mite DNA contamination might be a source of the identified endogenous rep-like elements. The reptile and amoebae rep-like sequences were nearly identical with each other and with sequences detected in chimpanzee feces raising the possibility that detection of novel or unusual rep-like elements in some host species might originate from the microbial community of the host. Our results indicate that attention is needed when broad-spectrum rep gene specific polymerase chain reaction is chosen for laboratory diagnosis of circovirus infections.
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Affiliation(s)
- Szilvia Marton
- 1 Hungarian Academy of Sciences Institute for Veterinary Medical Research, Centre for Agricultural Research Budapest Hungary
| | - Katalin Ihász
- 1 Hungarian Academy of Sciences Institute for Veterinary Medical Research, Centre for Agricultural Research Budapest Hungary
| | - György Lengyel
- 2 Hungarian Defence Forces Military Medical Centre Budapest Hungary
| | - Szilvia Farkas
- 1 Hungarian Academy of Sciences Institute for Veterinary Medical Research, Centre for Agricultural Research Budapest Hungary
| | - Ádám Dán
- 3 National Food Chain Safety Office Veterinary Diagnostic Directorate Budapest Hungary
| | - Petra Paulus
- 3 National Food Chain Safety Office Veterinary Diagnostic Directorate Budapest Hungary
| | - Krisztián Bányai
- 1 Hungarian Academy of Sciences Institute for Veterinary Medical Research, Centre for Agricultural Research Budapest Hungary
| | - Enikő Fehér
- 1 Hungarian Academy of Sciences Institute for Veterinary Medical Research, Centre for Agricultural Research Budapest Hungary
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Ndze VN, Esona MD, Achidi EA, Gonsu KH, Dóró R, Marton S, Farkas S, Ngeng MB, Ngu AF, Obama-Abena MT, Bányai K. Full genome characterization of human Rotavirus A strains isolated in Cameroon, 2010–2011: Diverse combinations of the G and P genes and lack of reassortment of the backbone genes. Infection, Genetics and Evolution 2014; 28:537-60. [DOI: 10.1016/j.meegid.2014.10.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 10/09/2014] [Accepted: 10/11/2014] [Indexed: 12/17/2022]
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11
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Hackl C, Böger C, Schlitt HJ, Farkas S. [Surgical technique for laparoscopic kidney donation]. Zentralbl Chir 2014; 139:483-5. [PMID: 25313885 DOI: 10.1055/s-0034-1383093] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVE Dialysis cannot fully replace kidney function in patients diagnosed with end-stage renal disease. Patients undergoing dialysis therapy show a significantly reduced quality of life, morbidity and mortality compared to healthy individuals. Every patient diagnosed with end-stage renal disease should be evaluated for a potential kidney transplant, potentially by means of living-donor kidney donation. INDICATIONS Via living-donor kidney donation, patients diagnosed with end-stage renal disease can receive a kidney transplant already before dialysis therapy needs to be initiated. Those patients show a significantly improved long-term graft and patient survival in comparison to patients transplanted after cadaveric organ donation. PROCEDURE We here describe the evaluation process of living-donor kidney donation and the procedure of transperitoneal laparoscopic donor-nephrectomy. CONCLUSION Although technically demanding, laparoscopic donor nephrectomy after careful donor evaluation is a safe procedure. An interdisciplinary medical-surgical management is important for both careful patient selection and life-long aftercare.
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Affiliation(s)
- C Hackl
- Klinik und Poliklinik für Chirurgie, Universitätsklinikum Regensburg, Deutschland
| | - C Böger
- Innere Medizin II, Abteilung für Nephrologie, Universitätsklinikum Regensburg, Deutschland
| | - H J Schlitt
- Klinik und Poliklinik für Chirurgie, Universitätsklinikum Regensburg, Deutschland
| | - S Farkas
- Klinik und Poliklinik für Chirurgie, Universitätsklinikum Regensburg, Deutschland
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12
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Abstract
Goose haemorrhagic polyomavirus (GHPV) provoke haemorrhagic nephritis and enteritis of domestic geese. Outbreaks were detected in European countries and caused economic losses for goose keepers. Domestic ducks may be infected with GHPV without any signs typical for geese. The genomic organisation of some isolates was described but the gene functions and the pathomechanisms of the virus was not precisely defined. Here we describe the genome sequence and structure of GHPV of a goose from a Hungarian goose flock showing characteristics of the haemorrhagic nephritis and enteritis. The GHPV genome investigated in this study was 5252 bp long and was very similar (99% nucleotide identity) to sequences deposited in the GenBank. All the whole GHPV genomes possess the same ORFs in length, including the VP1, VP2, VP3, ORF-X, t and T tumour antigens. Amino acid changes are detected mainly in the putative ORF-X region. Data about the GHPV genome imply a conserved genomic structure among isolates from different countries. Genomic and epidemiological studies may help vaccine development efforts and identify potential heterologous reservoirs of GHPV.
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Affiliation(s)
- Enikő Fehér
- 1 Hungarian Academy of Sciences Institute for Veterinary Medical Research, Centre for Agricultural Research Budapest Hungary
| | - György Lengyel
- 2 Hungarian Defence Forces Military Medical Centre Budapest Hungary
| | - Ádám Dán
- 3 National Food Chain Safety Office Veterinary Diagnostic Directorate Budapest Hungary
| | - Szilvia Farkas
- 1 Hungarian Academy of Sciences Institute for Veterinary Medical Research, Centre for Agricultural Research Budapest Hungary
| | - Krisztián Bányai
- 1 Hungarian Academy of Sciences Institute for Veterinary Medical Research, Centre for Agricultural Research Budapest Hungary
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13
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Ndze VN, Papp H, Achidi EA, Gonsu KH, László B, Farkas S, Kisfali P, Melegh B, Esona MD, Bowen MD, Bányai K, Gentsch JR, Odama AMT. One year survey of human rotavirus strains suggests the emergence of genotype G12 in Cameroon. J Med Virol 2013; 85:1485-90. [PMID: 23765785 DOI: 10.1002/jmv.23603] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/25/2013] [Indexed: 01/13/2023]
Abstract
In this study the emergence of rotavirus A genotype G12 in children <5 years of age is reported from Cameroon during 2010/2011. A total of 135 human stool samples were P and G genotyped by reverse transcriptase PCR. Six different rotavirus VP7 genotypes were detected, including G1, G2, G3, G8, G9, and G12 in combinations with P[4], P[6] and P[8] VP4 genotypes. Genotype G12 predominated in combination with P[8] (54.1%) and P[6] (10.4%) genotypes followed by G1P[6] (8.2%), G3P[6] (6.7%), G2P[4] (5.9%), G8P[6] (3.7%), G2P[6] (0.7%), G3P[8] (0.7%), and G9P[8] (0.7%). Genotype P[6] strains in combination with various G-types represented a substantial proportion (N=44, 32.6%) of the genotyped strains. Partially typed strains included G12P[NT] (2.2%); G3P[NT] (0.7%); G(NT)P[6] (1.5%); and G(NT)P[8] (0.7%). Mixed infections were found in five specimens (3.7%) in several combinations including G1+ G12P[6], G2+ G3P[6] + P[8], G3+ G8P[6], G3 + G12P[6] + P[8], and G12P[6] +P[8]. The approximately 10% relative frequency of G12P[6] strains detected in this study suggests that this strain is emerging in Cameroon and should be monitored carefully as rotavirus vaccine is implemented in this country, as it shares neither G- nor P-type specificity with strains in the RotaTeq® and Rotarix® vaccines. These findings are consistent with other recent reports of the global spread and increasing epidemiologic importance of G12 and P[6] strains.
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14
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Greten TF, Malek NP, Schmidt S, Arends J, Bartenstein P, Bechstein W, Bernatik T, Bitzer M, Chavan A, Dollinger M, Domagk D, Drognitz O, Düx M, Farkas S, Folprecht G, Galle P, Geißler M, Gerken G, Habermehl D, Helmberger T, Herfarth K, Hoffmann RT, Holtmann M, Huppert P, Jakobs T, Keller M, Klempnauer J, Kolligs F, Körber J, Lang H, Lehner F, Lordick F, Lubienski A, Manns MP, Mahnken A, Möhler M, Mönch C, Neuhaus P, Niederau C, Ocker M, Otto G, Pereira P, Pott G, Riemer J, Ringe K, Ritterbusch U, Rummeny E, Schirmacher P, Schlitt HJ, Schlottmann K, Schmitz V, Schuler A, Schulze-Bergkamen H, von Schweinitz D, Seehofer D, Sitter H, Straßburg CP, Stroszczynski C, Strobel D, Tannapfel A, Trojan J, van Thiel I, Vogel A, Wacker F, Wedemeyer H, Wege H, Weinmann A, Wittekind C, Wörmann B, Zech CJ. [Diagnosis of and therapy for hepatocellular carcinoma]. Z Gastroenterol 2013; 51:1269-326. [PMID: 24243572 PMCID: PMC6318804 DOI: 10.1055/s-0033-1355841] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The interdisciplinary guidelines at the S3 level on the diagnosis of and therapy for hepatocellular carcinoma (HCC) constitute an evidence- and consensus-based instrument that is aimed at improving the diagnosis of and therapy for HCC since these are very challenging tasks. The purpose of the guidelines is to offer the patient (with suspected or confirmed HCC) adequate, scientifically based and up-to-date procedures in diagnosis, therapy and rehabilitation. This holds not only for locally limited or focally advanced disease but also for the existence of recurrences or distant metastases. Besides making a contribution to an appropriate health-care service, the guidelines should also provide the foundation for an individually adapted, high-quality therapy. The explanatory background texts should also enable non-specialist but responsible colleagues to give sound advice to their patients concerning specialist procedures, side effects and results. In the medium and long-term this should reduce the morbidity and mortality of patients with HCC and improve their quality of life.
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15
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Papp H, Borzák R, Farkas S, Kisfali P, Lengyel G, Molnár P, Melegh B, Matthijnssens J, Jakab F, Martella V, Bányai K. Zoonotic transmission of reassortant porcine G4P[6] rotaviruses in Hungarian pediatric patients identified sporadically over a 15 year period. Infect Genet Evol 2013; 19:71-80. [PMID: 23792183 DOI: 10.1016/j.meegid.2013.06.013] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 06/08/2013] [Accepted: 06/10/2013] [Indexed: 12/24/2022]
Abstract
Genotype G4P[6] Rotavirus A (RVA) strains collected from children admitted to hospital with gastroenteritis over a 15 year period in the pre rotavirus vaccine era in Hungary were characterized in this study. Whole genome sequencing and phylogenetic analysis was performed on eight G4P[6] RVA strains. All these RVA strains shared a fairly conservative genomic configuration (G4-P[6]-I1/I5-R1-C1-M1-A1/A8-N1-T1/T7-E1-H1) and showed striking similarities to porcine and porcine-derived human RVA strains collected worldwide, although genetic relatedness to some common human RVA strains was also seen. The resolution of phylogenetic relationship between porcine and human RVA genes was occasionally low, making the evaluation of host species origin of individual genes sometimes difficult. Yet the whole genome constellations and overall phylogenetic analyses indicated that these eight Hungarian G4P[6] RVA strains may have originated by independent zoonotic transmission, probably from pigs. Future surveillance studies of human and animal RVA should go parallel to enable the distinction between direct interspecies transmission events and those that are coupled with reassortment of cognate genes.
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Affiliation(s)
- Hajnalka Papp
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Budapest, Hungary
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16
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Ndze VN, Achidi EA, Papp H, Kovács E, Farkas S, Adiogo D, Kisfali P, Ngeng MB, Abena MTO, Martella V, Esona MD, Bányai K. Shared G12 VP7 gene among human and bovine rotaviruses detected in Cameroonian villages. Acta Microbiol Immunol Hung 2013; 60:21-8. [PMID: 23529296 DOI: 10.1556/amicr.60.2013.1.3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Group A rotaviruses (RVA) are an important enteric pathogen in humans and livestock animals. Transmission of animal RVA strains to humans has been documented on several occasions. A reverse route of transmission of RVA under natural circumstances is anticipated, although evidence is scarce. However, experimental studies indicated that animals can be infected with human RVAs. By screening the stool samples collected from 157 cattle during 2011 in two Cameroonian villages, four samples (2.5%) were found positive for RVA. Upon sequence analysis of a 410 bp fragment of the VP7 gene, the RVA strains shared up to 100% nt identity to each other and to G12 RVAs identified in human patients living in the same geographic regions. This finding provides evidence for a human-to-animal transmission of an epidemic human rotavirus strain.
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Affiliation(s)
- Valentine Ngum Ndze
- Faculty of Medicine and Biomedical Sciences, University of Yaoundé, Yaoundé, Cameroon
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17
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Papp H, Al-Mutairi L, Chehadeh W, Farkas S, Lengyel G, Jakab F, Martella V, Szűcs G, Bányai K. Novel NSP4 genotype in a camel G10P[15] rotavirus strain. Acta Microbiol Immunol Hung 2012; 59:411-21. [PMID: 22982644 DOI: 10.1556/amicr.59.2012.3.11] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In this study a Kuwaiti camel rotavirus strain, RVA/Camel-wt/KUW/s21/2010/G10P[15], is characterized by sequencing and phylogenetic analysis. The strain had multiple genes with high nucleotide sequence similarities to ovine and bovine strains (VP2, ≤ 96%; NSP2 and NSP5, ≤ 97%, NSP3, ≤ 94%), or, to porcine strains (VP1, ≤ 89%). Other genes had moderate sequence similarities (VP4, ≤ 87%; VP6, ≤ 81%; VP7, ≤ 82%) with reference strains from ruminants. The NSP4 gene shared limited sequence identity (≤ 71%) with other mammalian and avian rotavirus NSP4 types, and was designated a novel genotype, E15. This study demonstrates genetic diversity in the outer capsid and some backbone genes of an old-world camelid rotavirus strain and uncovers its common evolutionary roots with strains from other ruminants.
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Affiliation(s)
- Hajnalka Papp
- 1 Hungarian Academy of Sciences Institute for Veterinary Medical Research, Centre for Agricultural Research Budapest Hungary
| | - Laila Al-Mutairi
- 2 Kuwait University College of Graduate Studies, Molecular Biology Program Kuwait Kuwait
| | - Wassim Chehadeh
- 3 Kuwait University Department of Microbiology, Faculty of Medicine Kuwait Kuwait
| | - Szilvia Farkas
- 1 Hungarian Academy of Sciences Institute for Veterinary Medical Research, Centre for Agricultural Research Budapest Hungary
| | - György Lengyel
- 4 Hungarian Defence Forces Dr. Radó György Military Medical Centre Budapest Hungary
| | - Ferenc Jakab
- 5 University of Pécs Department of Medical Microbiology and Immunology Pécs Hungary
| | - Vito Martella
- 6 University of Bari Department of Animal Health and Wellbeing Bari Italy
| | - György Szűcs
- 3 Kuwait University Department of Microbiology, Faculty of Medicine Kuwait Kuwait
| | - Krisztián Bányai
- 1 Hungarian Academy of Sciences Institute for Veterinary Medical Research, Centre for Agricultural Research Budapest Hungary
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18
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Tölgyesi Á, Sharma VK, Fekete S, Fekete J, Simon A, Farkas S. Development of a rapid method for the determination and confirmation of nitroimidazoles in six matrices by fast liquid chromatography–tandem mass spectrometry. J Pharm Biomed Anal 2012; 64-65:40-8. [DOI: 10.1016/j.jpba.2012.02.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2011] [Revised: 02/12/2012] [Accepted: 02/13/2012] [Indexed: 10/28/2022]
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19
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Koch A, Huber G, Farkas S, Schlitt H, Banas B, Seelbach-Göbel B. Komplikationsloser geburtshilflicher Verlauf nach kombinierter Pankreas-, Nieren- und Leber-Transplantation: Zwei Fallberichte. Z Geburtshilfe Neonatol 2012. [DOI: 10.1055/s-0032-1309153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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20
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Hartl J, Scherer MN, Farkas S, Loss M, Schnitzbauer AA, Baier L, Schlitt HJ, Kirchner GI. Lebertransplantation bei Patienten mit Budd-Chiari-Syndrom: Ätiologie, therapeutische Strategien und Outcome. Z Gastroenterol 2011. [DOI: 10.1055/s-0031-1284266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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21
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Jung EM, Ross CJ, Rennert J, Scherer MN, Farkas S, von Breitenbuch P, Schnitzbauer AA, Piso P, Lamby P, Menzel C, Schreyer AG, Feuerbach S, Schlitt HJ, Loss M. Characterization of microvascularization of liver tumor lesions with high resolution linear ultrasound and contrast enhanced ultrasound (CEUS) during surgery: First results. Clin Hemorheol Microcirc 2011; 46:89-99. [PMID: 21135485 DOI: 10.3233/ch-2010-1336] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
AIM Evaluation of high resolution linear ultrasound and intra-operative linear contrast enhanced ultrasound (CEUS) and its benefit for the detection and characterization of tumor lesions. MATERIAL AND METHODS Twenty patients were investigated preoperatively regarding tumor detection using CT (n = 8) or MRI (n = 12) and image fusion (VNav) (n = 3). All patients had surgery for their hepatic tumor (hepatocellular carcinoma (HCC), cholangiocellular carcinoma (CCC), metastasis, and adenoma). Ultrasound was performed intra-operatively first with B-scan using a convex probe. Than multifrequency linear transmitters (6-9 MHz, 6-15 MHz, LOGIQ E9, GE) were applied for B-scan, coulor coded Doppler sonography (CCDS) and Power Doppler followed by dynamic CEUS with Contrast Harmonic Imaging (CHI) after bolus injection of a maximum of 15 mL SonoVue®. RESULTS In 9 cases with the use of intra-operative CEUS additional tumor lesions (diameter 4-15 mm) could be detected and were histologically confirmed after surgical resection (7 cases) or intra-operative biopsy (2 cases). Using intraoperative CEUS 64 tumor lesions could be detected compared to 51 tumor lesions detected by preoperative CT or MRI (p < 0.05). Using the 6-15 MHz multifrequency linear transducer with CHI, arterial perfusion of adenomas, neuroendocrine metastases and HCC lesions was detectable. In 3 cases a resection was not achievable. Two of these cases were treated with radio frequency ablation (RFA). The other case had no curable option due to multifocal tumor manifestation. CONCLUSION The intra-operative use of high-resolution linear transducer techniques with CEUS offers new diagnostic perspectives for an effective liver surgery.
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Affiliation(s)
- E M Jung
- Department of Radiology, University Medical Center Regensburg, Regensburg, Germany.
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22
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Kollins D, Stoelcker B, Hoffmann U, Bergler T, Reinhold S, Banas MC, Rümmele P, Farkas S, Krämer BK, Banas B. FOXP3+ regulatory T-cells in renal allografts: correlation with long-term graft function and acute rejection. Clin Nephrol 2011; 75:91-100. [PMID: 21255537] [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: 05/30/2023] Open
Abstract
BACKGROUND The interpretation of a cellular infiltrate as cytotoxic or tolerogen represents an unsolved challenge in current transplantation. The so-called regulatory CD4+ CD25+ T-cells which express the FOXP3 gene have received increasing interest with respect to this question. The existing studies concerning the role of FOXP3+ Tregs for transplant tolerance yielded contradictory results. METHODS We examined the numbers of the FOXP3+ Tregs in two groups of renal allograft biopsies both showing cellular infiltration, but either without (n=29) or with signs of acute cellular rejection (n=26), by means of immunofluorescence and correlated the amount of FOXP3+ Tregs to renal function at the time of biopsy and after 1 and 2 years of follow up. RESULTS The number of FOXP3+ Tregs within infiltrates in non-rejecting biopsies did not correlate with renal function after 1 and 2 years. There were no significant differences in the numbers of FOXP3+ Tregs between biopsies with or without borderline infiltrates. Increased numbers of FOXP3+ Tregs were not associated with an ameliorated severity of graft rejection and did not correlate with outcome after the rejection episode and renal function after 1 and 2 years. CONCLUSIONS The identification of the FOXP3+ regulatory cells within the allograft cannot be considered as an appropriate marker for the interpretation of infiltrates as cytotoxic or tolerogenic or as a prognostic marker for later transplant function.
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Affiliation(s)
- D Kollins
- Department of Internal Medicine II, Institute of Pathology, School of Medicine, University Hospital Regensburg, Regensburg, Germany.
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24
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Hartl J, Buettner R, Rockmann F, Farkas S, Holstege A, Vogel C, Schnitzbauer A, Schlitt HJ, Schoelmerich J, Kirchner G. Giant cell hepatitis: an unusual cause of fulminant liver failure. Z Gastroenterol 2010; 48:1293-6. [PMID: 21043007 DOI: 10.1055/s-0029-1245476] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Giant cell hepatitis is a very rare disease of unknown origin. It has been hypothesized that drugs, viral infections, or autoimmune reactions may play a pathogenetic role. Here, we describe a 33 year old patient with bacterial bronchitis who was treated with doxycycline (100 mg/d) for one week. Furthermore the patient complained of malaise and a distinct jaundice. Liver parameters increased dramatically (AST 4670 U/l, ALT 5350 U/l, bilirubin 226 µmol/l) and liver function was impaired (INR = 1,45). The ultrasound scan showed a hepatomegaly with no signs of cirrhosis, normal spleen size and normal bile ducts; liver perfusion was normal. No evidence of Wilson's disease, hemochromatosis, autoimmune hepatitis, primary sclerosing cholangitis, primary biliary cirrhosis, hepatitis A, B, C and E, HIV, CMV, VZV, adenoviral infections, or paracetamol intoxication was found. Subsequently, the patient developed acute liver failure (AST 2134 U/l, ALT 2820 U/l, bilirubin 380 µmol/l, INR 3.0) and a beginning renal failure. Therefore, he was transferred to our transplant center. Due to increasing confusion and somnolence due to cerebral edema mechanical ventilation was needed. Because of an acute renal failure and severe hepatic encephalopathia MARS-hemodialysis was performed. Three weeks after the appearance of the jaundice he underwent liver transplantation (MELD 40). Surprisingly, in the explanted liver the diagnosis of giant cell hepatitis was made. Today--2 years after successful liver transplantation--the patient is in very good condition with normal liver function. In conclusion, giant cell hepatitis is a rare cause of acute liver failure that is often recognized only histologically.
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Affiliation(s)
- J Hartl
- Klinik und Poliklinik für Innere Medizin I, Universitätsklinikum Regensburg, Franz-Josef-Strauss-Allee 11, Regensburg
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25
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Hartl J, Scherer MN, Farkas S, Loss M, Schnitzbauer A, Baier L, Schlitt HJ, Schölmerich J, Kirchner GI. Langzeitüberleben, Alkohol-Rezidivhäufigkeit und Lebensqualität nach Lebertransplantation bei alkoholtoxischer Leberzirrhose. Z Gastroenterol 2010. [DOI: 10.1055/s-0030-1267649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Hartl J, Buettner R, Rockmann F, Farkas S, Holstege A, Vogel C, Schnitzbauer A, Schlitt HJ, Schölmerich J, Kirchner GI. Eine seltene Ursache für ein akutes Leberversagen. Z Gastroenterol 2010. [DOI: 10.1055/s-0030-1267662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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27
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Krüger B, Walberer A, Farkas S, Tokmak F, Obed A, Schenker P, Henning B, Schlitt H, Krämer B, Banas B. The Impact of “High-Producer” Interleukin-6 Haplotypes on Cardiovascular Morbidity and Mortality in a Kidney Transplant Population. Transplant Proc 2009; 41:2539-43. [DOI: 10.1016/j.transproceed.2009.06.123] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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28
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Henning BF, Kuchlbauer S, Böger CA, Obed A, Farkas S, Zülke C, Scherer MN, Walberer A, Banas M, Krüger B, Schlitt HJ, Banas B, Krämer BK. Percutaneous transluminal angioplasty as first-line treatment of transplant renal artery stenosis. Clin Nephrol 2009; 71:543-549. [PMID: 19473615] [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: 05/27/2023] Open
Abstract
BACKGROUND Transplant renal artery stenosis (TRAS) is a frequent complication after renal transplantation, however long-term follow-up data after interventional treatment are rare. PATIENTS In our transplant center 11 of 264 consecutive renal transplant recipients (4.17%) were diagnosed with TRAS. In addition, TRAS occurred in 2 renal transplant recipients that had been transplanted at other centers but who had their follow-up examinations in our center. Either a rise of the serum creatinine level and/or worsened systemic hypertension or routine examination with color Doppler sonography were indications for further diagnostic workup. METHODS Direct angiography of the transplant renal artery was performed followed by percutaneous transluminal angioplasty (PTA) after the diagnosis of TRAS was confirmed in all of these patients. RESULTS The immediate success rate for PTA was 92.3% (12/13). Only 1 patient with a severe kinking of the transplant renal artery had to undergo surgery to restore renal function. No complications occurred after the interventions. Thereafter the patients were monitored for a mean observation period of 33.15 months. Serum creatinine levels were significantly lower after the intervention, and estimated glomerular filtration rate (eGFR) increased accordingly. With regard to blood pressure there was only a trend for lower blood pressure levels and less antihypertensive use, whereas the dose of the prescribed drugs decreased significantly with time after interventional treatment of TRAS. In addition, a long-lasting rise of the hemoglobin levels could also be demonstrated. CONCLUSION In summary, the beneficial effect of PTA of TRAS on renal function is long-lasting. Therefore, PTA, usually combined with stent placement, should be first-line treatment in TRAS in all patients. Surgical revascularization is only warranted, if PTA fails.
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Affiliation(s)
- B F Henning
- Department of Medicine I, Marienhospital Herne, Ruhr University, Bochum, Germany.
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29
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Jung E, Schreyer A, Schacherer D, Menzel C, Farkas S, Loss M, Feuerbach S, Zorger N, Fellner C. New real-time image fusion technique for characterization of tumor vascularisation and tumor perfusion of liver tumors with contrast-enhanced ultrasound, spiral CT or MRI: First results. Clin Hemorheol Microcirc 2009; 43:57-69. [PMID: 19713601 DOI: 10.3233/ch-2009-1221] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- E.M. Jung
- Institute of Radiology, University Medical Center Regensburg, Regensburg, Germany
| | - A.G. Schreyer
- Institute of Radiology, University Medical Center Regensburg, Regensburg, Germany
| | - D. Schacherer
- Department of Internal Medicine I and Radiology, Interdisciplinary Center of Clinical Ultrasound, University Medical Center Regensburg, Regensburg, Germany
| | - C. Menzel
- Institute of Radiology, University Medical Center Regensburg, Regensburg, Germany
| | - S. Farkas
- Department of Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - M. Loss
- Department of Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - S. Feuerbach
- Institute of Radiology, University Medical Center Regensburg, Regensburg, Germany
| | - N. Zorger
- Institute of Radiology, University Medical Center Regensburg, Regensburg, Germany
| | - C. Fellner
- Institute of Radiology, University Medical Center Regensburg, Regensburg, Germany
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Obed A, Uihlein DC, Zorger N, Farkas S, Scherer MN, Krüger B, Banas B, Krämer BK. Severe renal vein stenosis of a kidney transplant with beneficial clinical course after successful percutaneous stenting. Am J Transplant 2008; 8:2173-6. [PMID: 18828776 DOI: 10.1111/j.1600-6143.2008.02356.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A 51-year-old renal transplant recipient presented with marked renal function deterioration 13 months after renal transplantation. After exclusion of ureteral obstruction, transplant artery stenosis and acute rejection, the diagnosis of a severe renal vein stenosis was made by an MR scan. After angiographic confirmation of the stenosis, treatment was attempted with percutaneous stent angioplasty. The long-term clinical course was favorable, with marked improvement in renal function. Transplant renal vein stenosis is a rare, but potentially curable, cause of renal allograft functional deterioration.
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Affiliation(s)
- A Obed
- Klinik und Poliklinik für Chirurgie, University of Regensburg, Regensburg, Germany.
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Borza I, Greiner I, Kolok S, Galgóczy K, Ignácz-Szendrei G, Horváth C, Farkas S, Gáti T, Háda V, Domány G. New benzoyl urea derivatives as novel NR2B selective NMDA receptor antagonists. Pharmazie 2006; 61:799-800. [PMID: 17020160] [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: 05/12/2023]
Abstract
A novel series of benzoyl urea derivatives was prepared and identified as NR2B selective NMDA receptor antagonists. The influence of the substitution of the piperidine ring on the biological activity of the compounds was studied. Compound 9 was active in the formalin test in mice.
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Affiliation(s)
- I Borza
- Gedeon Richter Ltd, Budapest, Hungary.
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32
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Schnitzbauer AA, Loss M, Hornung M, Farkas S, Krämer B, Wieland W, Schlitt HJ, Obed A. Pararektale Miniinzision zur streng retroperitonealen Nephrektomie in der Lebendspende. Urologe A 2006; 45:1170-5. [PMID: 16767454 DOI: 10.1007/s00120-006-1080-0] [Citation(s) in RCA: 3] [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: 10/24/2022]
Abstract
PURPOSE In this study we present the technique of a strictly retroperitoneal donor nephrectomy via a pararectal mini-incision. MATERIAL AND METHODS Data of 34 living kidney donations were analyzed. All donors underwent a pararectal mini-incision and strictly retroperitoneal nephrectomy (MIDN). RESULTS Total operation time, perioperative use of pain medication, length of hospital stay after successful mobilization, and return to full enteral nutrition and regular digestion were evaluated retrospectively. Total operation time for MIDN was 132+/-26 min. The total average application was 22.2+/-19.4 mg of opioid in morphine equivalent dosage (MED), 7.7+/-6.1 g metamizol, and 512+/-325 mg NSAR during hospital stay, which was 4.9+/-1.4 days. Patients were mobilized primarily 2.9+/-8.0 h after surgery. Mobility was achieved 33.8+/-15.8 h after surgery. Enteral nutrition with fluids was started after 1.9+/-7.0 h, full enteral nutrition was accomplished after 37.4+/-19.0 h, and normal digestion returned 58.6+/-23.0 h after the procedure. CONCLUSIONS The strictly retroperitoneal nephrectomy via a mini-incision is an elegant, minimally traumatic, safe, and quickly learnable method, resulting in short hospital stays, good cosmetic results, and a low grade of complications.
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Affiliation(s)
- A A Schnitzbauer
- Klinik und Poliklinik für Chirurgie, Universität, Franz-Josef-Strauss-Allee 11, 93053, Regensburg.
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33
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Krüger B, Schnitzbauer AA, Böger CA, Hoffmann U, Banas B, Farkas S, Schlitt HJ, Obed A, Krämer BK. Pretransplant calcium levels have no predictive value for delayed graft function, long-term graft function, cardiovascular events, or graft and patient survival in renal transplantation. Transplant Proc 2006; 38:697-700. [PMID: 16647448 DOI: 10.1016/j.transproceed.2006.01.032] [Citation(s) in RCA: 6] [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: 11/24/2022]
Abstract
BACKGROUND Disorders of calcium homeostasis are one of the most common problems in patients with end-stage renal disease (ESRD). Elevated calcium levels increase the incidence of cardiovascular mortality in ESRD patients, and appear to be a risk factor for the occurrence of delayed graft function (DGF) after kidney transplantation. Therefore, we investigated the impact of pretransplant serum calcium levels on outcomes after kidney transplantation: DGF, acute rejection, graft function, and survival, as well as the incidence of cardiovascular events. METHODS We studied 285 patients (96.9% of all transplanted patients) who underwent their first transplantation between 1995 and 2004. Demographic data were extracted from hospital records or were documented during follow-up; serum samples were collected at the time of transplantation. RESULTS In our cohort the incidence of DGF was 16.5% and 35.4% of acute rejection episodes (ARE). However, pretransplant calcium levels were not related to DGF or ARE in our patient cohort. Furthermore, there was no correlation between pretransplant serum calcium level with the incidence of cardiovascular events or mortality, as well as graft function or survival. CONCLUSION In our study population pretransplant calcium levels showed no effect on DGF, ARE rate, the occurrence of cardiovascular events or death, renal graft function, or survival. Therefore, pretransplant calcium level is not a helpful marker for risk stratification at the time of transplantation.
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Affiliation(s)
- B Krüger
- Klinik und Poliklinik für Innere Medizin II, Nephrologie, Universität Regensburg, Regensburg, Germany.
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34
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Farkas S, Hornung M, Sattler C, Anthuber M, Gunthert U, Herfarth H, Schlitt HJ, Geissler EK, Wittig BM. Short-term treatment with anti-CD44v7 antibody, but not CD44v4, restores the gut mucosa in established chronic dextran sulphate sodium (DSS)-induced colitis in mice. Clin Exp Immunol 2005; 142:260-7. [PMID: 16232212 PMCID: PMC1809521 DOI: 10.1111/j.1365-2249.2005.02911.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [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: 12/31/2022] Open
Abstract
Increased expression of CD44 variant isoforms have been shown on the inflammatory infiltrates in human and mouse colitis and blockade or deletion of CD44 isoforms inhibit experimental colitis. The objective of this study was to find out if short-term treatment of CD44 antibodies specific to CD44v7, but not to other variant isoforms, suppresses leucocyte-endothelial interaction in chronic dextran sodium sulphate (DSS)-induced colitis in mice. Chronic colitis was induced by oral administration of four cycles of 5% DSS in BALB/c mice. Expression of CD44 was investigated on isolated mononuclear cells of the gut immune system. In established colitis, mice were treated with antibodies against CD44v7 or CD44v4 three times in 7 days. Intravital microscopy was used to study leucocyte-endothelial interactions and leucocyte extravasation. As a marker of inflammatory infiltrates myeloperoxidase was quantified in gut tissue. CD44-induced apoptosis was determined by fluorescence staining of hypodiploidic cell nuclei. In chronic DSS-induced colitis both CD44 variant isoforms, v4 and v7 were significantly up-regulated on mononuclear cells. However, whereas anti-CD44v7 antibody treatment induced a marked restoration of the gut mucosa and significantly reduced endothelial sticking and extravasation of circulating leucocyte in vivo (P < 0.01), application of anti-CD44v4 or an isotype control antibody had no anti-inflammatory effect. A significant reduction of myeloperoxidase activity was detected after blockade of CD44v7, but not v4. Short-term treatment with anti-CD44v7 antibody blocks T cell extravasation and recruitment to the intestinal mucosa and cures established experimental colitis.
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Affiliation(s)
- S Farkas
- Department of Surgery, University of Regensburg, Germany.
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35
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Paul G, Bataille F, Obermeier F, Bock J, Klebl F, Strauch U, Lochbaum D, Rümmele P, Farkas S, Schölmerich J, Fleck M, Rogler G, Herfarth H. Analysis of intestinal haem-oxygenase-1 (HO-1) in clinical and experimental colitis. Clin Exp Immunol 2005; 140:547-55. [PMID: 15932518 PMCID: PMC1809385 DOI: 10.1111/j.1365-2249.2005.02775.x] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2005] [Indexed: 12/12/2022] Open
Abstract
Haem-oxygenase-1 (HO-1) has been shown to exert anti-inflammatory, anti-apoptotic and anti-proliferative effects. We investigated HO-1 expression in patients with inflammatory bowel disease (IBD) and could demonstrate a scattered expression of HO-1 in the intestinal epithelium of severely inflamed colonic mucosa of patients with IBD compared to control specimens such as diverticulitis, suggesting dysregulated expression in IBD. To further analyse potential mechanisms of HO-1 induction in the intestine we employed an in vitro epithelial cell apoptosis model and an experimental colitis model. In vitro induction of HO-1 by the HO-1 inducer cobalt protoporphyrin (CoPP) resulted in a dose-dependent down-regulation of caspase-3 activation in HT-29 cells, indicating an anti-apoptotic function of HO-1 in the intestine. In vivo, preventive HO-1 induction by CoPP in acute dextran sodium sulphate (DSS)-induced colitis led to a significant down-regulation of colonic inflammation (P < 0.01) with a concomitant reduction in interferon (IFN)-gamma - but unaffected interleukin (IL)-10-secretion by isolated mesenteric lymph nodes (P < 0.01). Additionally, TUNEL staining of colonic sections demonstrated fewer apoptotic epithelial cells in the colon of CoPP treated animals. No beneficial effects were observed if HO-1 was induced by CoPP after the onset of acute colitis or in chronic DSS-induced colitis. In conclusion, the data suggest a protective role of HO-1 if it is induced before the onset of inflammation. However, as shown by the lack of effects in established acute or in chronic colitis, the induction of HO-1 may not be a promising approach for the treatment of IBD.
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Affiliation(s)
- G Paul
- Department of Internal Medicine I, University of Regensburg, Germany
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36
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Farkas S, Bolder U, Schlittenbauer T, Obed A, Zuelke C, Anthuber M, Geissler EK, Schlitt HJ. Conditioning of liver grafts with prostaglandins improves bile acid transport. Transplant Proc 2005; 37:435-8. [PMID: 15808668 DOI: 10.1016/j.transproceed.2004.12.299] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 11/19/2022]
Abstract
INTRODUCTION Conditioning of liver grafts by bolus pretreatment with prostaglandins has been previously demonstrated to improve hepatic bile flow. However, the underlying mechanisms have not been investigated. To elucidate whether improved bile flow after prolonged ischemia is due to maintained bile acid secretion or due to increased paracellular permeability, we performed a study using increasing doses of the marker acid taurocholate in the isolated perfused rat liver system. METHODS Livers were harvested from adult Lewis rats and stored for 24 hours in UW solution. Pretreatment of livers was performed 1 minute before preservation. One group received prostaglandin I2, the second group received prostaglandin E1, and the control group was treated with saline. After 24 hours of cold storage the grafts were investigated in the isolated perfused rat liver system by perfusion with an oxygenated Krebs-Ringer-Henseleit buffer. Increasing doses of the radiolabeled marker bile acid taurocholate were infused to investigate bile acid transport. RESULTS Bile flow and bile acid output were increased by pretreatment of the livers with prostaglandin I2 and prostaglandin E1, as compared to the control group. More specifically, the maximum transport rate was tripled by prostaglandin I2 and by prostaglandin E1 preconditioning of liver grafts, in comparison to the control group (P < .01 vs prostaglanin I2 and E1). CONCLUSION The results clearly demonstrate that increased bile flow after conditioning of liver grafts with prostaglandins is not due to increased paracellular permeability but is based on markedly improved bile acid output.
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Affiliation(s)
- S Farkas
- Department of Surgery, University of Regensburg, Regensburg, Germany.
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37
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Bataille F, Klebl F, Rümmele P, Schroeder J, Farkas S, Wild PJ, Fürst A, Hofstädter F, Schölmerich J, Herfarth H, Rogler G. Morphological characterisation of Crohn's disease fistulae. Gut 2004; 53:1314-21. [PMID: 15306592 PMCID: PMC1774207 DOI: 10.1136/gut.2003.038208] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Fistulae are a common complication in up to 35% of all patients with Crohn's disease. Their therapy is difficult and frequently unsatisfactory. To date, no histological comparison of Crohn's disease fistulae with non-inflammatory bowel disease fistulae has been performed. In addition, Crohn's disease fistulae have not been well characterised morphologically. METHODS Eighty four fistulae from Crohn's disease patients were compared with 13 fistulae from controls. Haematoxylin-eosin staining, electron microscopy, and immunohistochemistry for panCytokeratin (epithelial cells), CD20 (B cells), CD45R0 (T cells), and CD68 (macrophages) were performed according to standard techniques. In addition, histopathological findings were compared with clinical and laboratory data. RESULTS In 31.0% of controls and 27.4% of Crohn's disease specimens, fistulae had a lining of flattened intestinal epithelium without goblet cells or, in the case of cutaneous/perianal disease, narrow squamous epithelium. Non-epithelialised fistulae were covered by a thin layer of (myo)fibroblasts, focally forming a new basement membrane, as demonstrated by electron microscopy. All fistulae were surrounded by granulation tissue. Crohn's disease fistulae presented with central infiltration by CD45R0+ T cells, followed by a small band of CD68+ macrophages and dense accumulation of CD20+ B cells. In contrast, in controls, there was dense infiltration by CD68+ macrophages with only few CD20+ B cells and CD45R0+ T lymphocytes. CONCLUSIONS Fistulae in Crohn's disease differ markedly from non-Crohn's disease fistulae with regard to their cellular composition. The presence of an epithelial lining in a subgroup of fistulae may be important for the therapeutic approach and healing process.
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Affiliation(s)
- F Bataille
- Institute of Pathology, University of Regensburg, 93042 Regensburg, Germany.
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38
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Stopfer P, Obermeier F, Dunger N, Falk W, Farkas S, Janotta M, Möller A, Männel DN, Hehlgans T. Blocking lymphotoxin-beta receptor activation diminishes inflammation via reduced mucosal addressin cell adhesion molecule-1 (MAdCAM-1) expression and leucocyte margination in chronic DSS-induced colitis. Clin Exp Immunol 2004; 136:21-9. [PMID: 15030510 PMCID: PMC1808998 DOI: 10.1111/j.1365-2249.2004.02402.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/06/2004] [Indexed: 01/13/2023] Open
Abstract
The lymphotoxin-beta receptor (LTbetaR) pathway is critical for maintenance of organized lymphoid structures and is involved in the development of colitis. To investigate the mechanisms by which LTbetaR activation contributes to the pathology of chronic inflammation we used a soluble LTbetaR-Ig fusion protein as a competitive inhibitor of LTbetaR activation in the mouse model of chronic colitis induced by oral administration of dextran sulphate sodium. Strong expression of LTbeta which constitutes part of the LTalpha(1)beta(2) ligand complex was detected in colonic tissue of mice with chronic colitis. Treatment with LTbetaR-Ig significantly attenuated the development and histological manifestations of the chronic inflammation and reduced the production of inflammatory cytokines such as TNF, IL-1beta, and IL-6. Moreover, LTbetaR-Ig treatment significantly down-regulated mucosal addressin cell adhesion molecule-1 (MAdCAM-1) expression, leading to reduced leucocyte rolling and sticking in postcapillary and collecting venules and reduced extravasation into the intestinal mucosa as quantified by in vivo fluorescence microscopy. Thus, LTbetaR pathway inhibition ameliorates DSS-induced experimental chronic colitis in mice by MAdCAM-1 down-regulation entailing reduced lymphocyte margination and extravasation into the inflamed mucosa. Therefore, a combined treatment with reagents blocking T cell-mediated perpetuation of chronic inflammation such as LTbetaR-Ig together with direct anti-inflammatory reagents such as TNF inhibitors could constitute a promising treatment strategy for chronic colitis.
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Affiliation(s)
- P Stopfer
- Institute of Immunology, University of Regensburgy, Ludwigshafen, Germany
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39
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Farkas S, Herfarth H, Rössle M, Schroeder J, Steinbauer M, Guba M, Beham A, Schölmerich J, Jauch KW, Anthuber M. Quantification of mucosal leucocyte endothelial cell interaction by in vivo fluorescence microscopy in experimental colitis in mice. Clin Exp Immunol 2001; 126:250-8. [PMID: 11703368 PMCID: PMC1906186 DOI: 10.1046/j.1365-2249.2001.01544.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2001] [Indexed: 12/17/2022] Open
Abstract
Leucocyte recruitment to sites of intestinal inflammation is a crucial, multi-step process that leads ultimately to the accumulation of cells in the inflamed tissue. We established a new in vivo model system of experimental colitis to quantify leucocyte-endothelial cell interaction and leucocyte extravasation in the inflamed mucosa of the colon. Furthermore, we investigated the pathophysiological role of ICAM-1 in the intestinal microcirculation in vivo. Using the model of dextran sodium sulphate (DSS)-induced acute and chronic colitis in mice, in vivo microscopy was performed in the colonic submucosal postcapillary venules and the submucosal collecting venules in normal or inflamed murine colonic segments. ICAM-1 expression was blocked by an anti-ICAM-1 monoclonal antibody or by suppressing NF-kappaB activation by gliotoxin. Significant increases in leucocyte adhesiveness (51-fold in postcapillary venules, 30-fold in collecting venules, P < 0.01) and extravasation (6.5-fold) could be demonstrated as early as day 2 of DSS-application in acute colitis (P < 0.01). This was paralleled by increases in both the histological damage scores and myeloperoxidase activities. In chronic dextran sodium sulphate-induced colitis significant increases in leucocyte-endothelium interactions and leucocyte extravasation were observed. Blocking ICAM-1 expression with a monoclonal antibody or gliotoxin, leucocyte sticking and extravasation were significantly down-regulated in vivo compared to controls (> 70%; P < 0.01). This new model system offers the possibility to specifically assess the role of adhesion molecules in the colonic mucosa in vivo as well as to investigate and quantify the effectiveness of experimental therapeutic approaches in acute or chronic intestinal inflammation.
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Affiliation(s)
- S Farkas
- Department of Surgery, Klinik und Poliklinik für Chirurgie, Klinikum der Universität Regensburg, Regensburg, Germany.
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40
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Fischer E, Tóth A, Farkas S. Deltamethrin, effects on volume control, and water balance in Eisenia fetida Sav. (Annelida, Lumbricidae). Bull Environ Contam Toxicol 2001; 66:269-276. [PMID: 11116324 DOI: 10.1007/s0012800234] [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: 05/23/2023]
Affiliation(s)
- E Fischer
- Hungarian Academy of Sciences, University of Pécs, Adaptation Biology Research Group, and Department of General Zoology and Neurobiology, University of Pécs, H-7624 Pécs, Ifjúság u. 6, Hungary
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41
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Gunics G, Motohashi N, Molnár J, Farkas S, Kawase M, Saito S, Shah A. Enhanced antibacterial effect of erythromycin in the presence of 3,5-dibenzoyl-1,4-dihydropyridines. Anticancer Res 2001; 21:269-73. [PMID: 11299745] [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: 02/19/2023]
Abstract
Fifteen 3,5-dibenzoyl-1,4-dihydropyridines (BzDHP, GB1-GB15) (nifedipine (NP) analogs) were tested on three different E. coli strains. The compounds had relatively high MIC values on these strains. In combination with erythromycin (Er), compounds (G1,3,4,6,7,10,12) reduced MIC values of Er. When the BzDHPs were tested on E. coli Gy-1/Apsen.Erres strain isolated from a clinical specimen, the reduction of MIC values were similar to the previous strains, but not identical. In the polyresistant clinically isolated E. coli Gy-2/Apres.Erres strain, the MIC values of Er were slightly reduced in the presence of GB1-GB7. Compound GB12 was the most effective in enhancing the activity of Er, and was selected for plasmid elimination studies. However, GB12 itself had no antiplasmid effect and did not alter the promethazine induced plasmid elimination.
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Affiliation(s)
- G Gunics
- Faculty of Medicine, Institute of Microbiology, Albert Szent-Györgyi Medical University, Szeged, Hungary
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42
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Tóth J, Farkas S. [Experience with the laparoscopic repair of inguinofemoral hernias]. Orv Hetil 2000; 141:1813-6. [PMID: 10979310] [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: 02/17/2023]
Abstract
The authors have performed 110 inguinofemoral hernioplasties on 100 patients by transabdominal endoscopic method. There has been only one serious complication: a 50 years old man was reoperated on against a trocar-site bleeding and a postoperative adhesion-ileus. All patients recovered. The authors have got good experiences: postoperative pains are minimal, hospitality is short, ability to work comes back soon. Technics of the operation and cost-analysis are discussed here.
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Affiliation(s)
- J Tóth
- Siófok Város Kórház-Rendelóintézete Sebészeti Osztály
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43
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Steinbauer M, Guba M, Büchner M, Farkas S, Anthuber M, Jauch KW. Impact of polynitroxylated albumin (PNA) and tempol on ischemia/reperfusion injury: intravital microscopic study in the dorsal skinfold chamber of the Syrian golden hamster. Shock 2000; 14:163-8. [PMID: 10947161 DOI: 10.1097/00024382-200014020-00015] [Citation(s) in RCA: 13] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Nitric oxide-releasing drugs have been shown to reduce ischemia/reperfusion (I/R) injury by acting as radical scavengers. However, their therapeutic application is hampered by specific side effects and rapid bioreduction in vivo. The half-life and antioxidant activity of nitroxides may be enhanced by their covalent binding to human serum albumin, resulting in polynitroxyl albumin (PNA). Thus, PNA may represent a novel antioxidative drug. The objectives of this study were to elucidate 1) whether PNA is able to diminish I/R injury; 2) the most effective dose of PNA in vivo; and 3) whether the addition of the nitroxide tempol enhances and/or prolongs the effect of PNA. Experiments were performed using a 4-h tourniquet-induced ischemia model in the hamster dorsal skinfold chamber. In the first part, five groups (n = 6) of animals received an infusion of 1) 1% body weight (b.w.) saline (0.9%); 2) 0.5% b.w. albumin (20%); 3) 0.5% b.w. PNA (20%); 4) 1% b.w. albumin (20%); and 5) 1% b.w. PNA (20%) 15 min prior to reperfusion. In the second part of the study, tempol (17 mg/mL) was added either to albumin or PNA (1:9), and 0.5% b.w. of this solution was infused (Group 6: tempol + albumin 0.5% b.w.; Group 7: tempol + PNA 0.5% b.w.). Intravital fluorescence microscopy allowed for quantification of functional capillary density (FCD), leukocyte adherence, extravasation of fluorescein isothiocyanate-labeled Dextran and non-viable (Propidium-positive) cell count prior to ischemia and 0.5 h, 2 h, and 24 h after reperfusion. PNA and--to a lesser extent albumin--effectively reduced postischemic microvascular perfusion failure, leukocyte adhesion, and tissue injury. PNA was most effective in the dose 1% b.w. Although free oxygen radical scavenging seems to be an underlying mechanism leading to the beneficial effects of PNA on I/R injury, hemodilution and known radical scavenging properties of pure albumin contribute in part to the observed effects. Although the combination of tempol and PNA revealed further short-term effects on microvascular perfusion and leukocyte adhesion, it did not result in a long-term improvement of tissue injury.
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Affiliation(s)
- M Steinbauer
- Department of Surgery, University Regensburg, Germany
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44
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Horváth C, Farkas S, Nagy J. Receptor components of glutamate-evoked increase in intracellular Ca2+ concentration of neurons in culture. Neurobiology (Bp) 2000; 7:69-70. [PMID: 10746251] [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] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- C Horváth
- Pharmacological Research Centre, Gedeon Richter Ltd., Budapest, Hungary
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45
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Abstract
The individual activity of antibiotics such as ampicillin, tetracycline, erythromycin and gentamicin in combination with compounds known to modify bacterial resistance to given antibiotics was studied using the checkerboard method. The combination of promethazine with either ampicillin, tetracycline or erythromycin or the combination of methylene blue and erythromycin produced significant synergistic activity against Escherichia coli. Verapamil, however, in combination with ampicillin reduced the activity of ampicillin against E. coli. Combinations of clomipramine with either tetracycline or erythromycin, promethazine and erythromycin or verapamil and ampicillin were synergistic against Staphylococcus epidermidis that was resistant to these antibiotics. The only synergy against Pseudomonas aeruginosa was shown by the combination of methylene blue and gentamicin.
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Affiliation(s)
- G Gunics
- Department of Microbiology, Albert Szent-Gybrgyi Medical University, Szeged, Hungary
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46
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Farkas S. [Surgical treatment of cholelithiasis in the era of minimal invasiveness]. Orv Hetil 2000; 141:557-61. [PMID: 10741168] [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: 02/16/2023]
Abstract
Three hundred and eighty-four patients with cholelithiasis have been operated on at the author's department in two years. There were 186 laparoscopic cholecystectomies, 162 micro-minilaparotomies and 36 traditional operations. All but one patients recovered. The author's opinion is, that laparoscopic and micro-minilaparotomic cholecystectomies are nearly identical operations in the treatment of cholelithiasis, but the indication of the two minimal invasive methods is not the same.
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Affiliation(s)
- S Farkas
- Siófok Város Kórház-Rendelóintézete, Sebészeti Osztály
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47
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Guba M, Steinbauer M, Büchner M, Frölich D, Farkas S, Jauch KW, Anthuber M. Differential effects of short-term ace- and AT1-receptor inhibition on postischemic injury and leukocyte adherence in vivo and in vitro. Shock 2000; 13:190-6. [PMID: 10718375 DOI: 10.1097/00024382-200003000-00004] [Citation(s) in RCA: 37] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
There is recent evidence that angiotensin-converting enzyme (ACE) inhibition reduces postischemic injury and angiotensin II receptor inhibition may have similar effects. We therefore further characterized the role of ACE- vs. AT1-receptor inhibition on cell injury and temporal association of leukocyte endothelial interaction in response to ischemia-reperfusion. A combined in vivo and in vitro study comparing the ACE inhibitor enalapril and the AT1-receptor antagonist losartan was performed. The extent and temporal correlation of cellular damage (propidium-iodide staining), microvascular perfusion failure and leukocyte-endothelial interaction (leukocyte adherence) were investigated by means of intravital microscopy, after the application of hemodynamically ineffective doses of enalapril and losartan (5 mg/kg). A hamster dorsal skinfold model with a 4-h tourniquet ischemia was used. In vitro, the effect of enalapril and losartan on polymorphonuclear cell (PMN) adherence, as well as adhesion molecule expression (ICAM-1, VCAM-1), on hypoxia- or IL-1beta-stimulated endothelial cells (HUVEC) was assessed using a PMN-adhesion assay and flow cytometry, respectively. Ischemia-reperfusion responses revealed a biphasic pattern, comprised of an early phase (30 min) of acute cellular damage and microvascular perfusion failure, followed by a late increase (240 min) in leukocyte adherence in vivo. Enalapril significantly reduced early cellular damage, microvascular perfusion failure, and leukocyte adherence in response to ischemia-reperfusion. Conversely, AT1 receptor inhibition with losartan proved to be ineffective at attenuating postischemic microcirculatory disorders (leukocyte-endothelial interactions, microvascular perfusion failure) and aggravated cellular injury. In vitro, enalapril reduced PMN adherence and ICAM-1 and VCAM-1 expression, while losartan was ineffective in the same respect. Following ischemia-reperfusion injury, ACE- versus AT1-receptor inhibition induce differential effects concerning the extent and temporal association of cell injury and leukocyte-endothelial interaction. The use of enalapril combines the beneficial effects of preventing cell and vascular injury immediately after reperfusion, with a delayed inhibition of the inflammatory response. Since the AT1-receptor inhibitor losartan did not mimic effects obtained with ACE inhibition, it is conceivable that the responses in ischemia-reperfusion are mediated by a non-angiotensin II-AT1 receptor-dependent mechanism.
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Affiliation(s)
- M Guba
- Department of Surgery, University of Regensburg, Germany
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48
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Bognár J, Farkas S, Inczeffy I. [Minimal invasive lumbar sympathectomy]. Orv Hetil 1999; 140:2913-5. [PMID: 10659643] [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: 02/15/2023]
Abstract
Forty-four lumbar sympathectomies have been made on 42 patients by ROMICRO-set at the authors' department. This method--made by a specially developed lighting retractor system--ensures the same exposure as the traditional approach, but the visibility of the operative field is much better. The costs of the material character are low. Technique of the operation is discussed. Authors have got good experiences: there were no complications, postoperative pain is minimal, the time of the hospitalization is shortened. A special advantage of this new approach is that it can be even made on patients-belonging to ASA IV., and they can be operated on in epidural anesthesia. The authors recommend this new method only for those surgeons who are experienced in the technique of traditional lumbar sympathectomies.
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Affiliation(s)
- J Bognár
- Siófok Város Kórház-Rendelöintézete, Sebészeti Osztály
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49
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Hajós G, Farkas S, Szerdahelyi E, Polgár M. Effect of methionine enrichment on the biological activities of food proteins. Acta Biol Hung 1999; 49:201-7. [PMID: 10526962] [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: 02/14/2023]
Abstract
A special enzymatic technique, the enzymatic peptide modification (EPM) reactions have been worked out in our laboratory, by which proteins can be modified with respect to their biological activities. Enzymatic modification methods provide several advantages in producing proteins of desired nutritional properties. Proteolytic modification, particularly when combined with methionine enrichment, significantly altered the biological activities and leads to increased nutritional value.
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Affiliation(s)
- G Hajós
- Central Food Research Institute, Budapest, Hungary
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50
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Nelson S, Belknap SM, Carlson RW, Dale D, DeBoisblanc B, Farkas S, Fotheringham N, Ho H, Marrie T, Movahhed H, Root R, Wilson J. A randomized controlled trial of filgrastim as an adjunct to antibiotics for treatment of hospitalized patients with community-acquired pneumonia. CAP Study Group. J Infect Dis 1998; 178:1075-80. [PMID: 9806037 DOI: 10.1086/515694] [Citation(s) in RCA: 151] [Impact Index Per Article: 5.8] [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: 11/03/2022] Open
Abstract
Because of the critical role of neutrophils in host defenses, it was hypothesized that stimulation of neutrophil production and function with Filgrastim would improve the outcome of hospitalized patients with community-acquired pneumonia. To test this hypothesis, a randomized, placebo-controlled, multicenter trial of Filgrastim (300 micrograms/day up to 10 days) as an adjunct to antibiotics was conducted for these patients. Outcome measures included time to resolution of morbidity (TRM, a composite measure of temperature, respiratory rate, blood oxygenation, and chest radiograph), 28-day mortality, length of stay, and adverse events. Filgrastim increased blood neutrophils 3-fold, but TRM, mortality, and length of hospitalization were not affected. Treatment, however, accelerated radiologic improvement and appeared to reduce serious complications (e.g., empyema, adult respiratory distress syndrome, and disseminated intravascular coagulation). Filgrastim administration was safe and well tolerated in these patients. Additional trials are needed to establish the value of this approach to treatment of infectious diseases.
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Affiliation(s)
- S Nelson
- Division of Pulmonary Critical Care, Louisiana State University, New Orleans.
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