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Vogel-Claussen J, Lasch F, Bollmann AB, May K, Kuhlmann A, Schmid-Bindert G, Kaaks R, Barkhausen J, Bohnet S, Reck M. HANSE – Ganzheitliche Implementierungsstudie eines norddeutschen interdisziplinären Lungenkrebs Früherkennungs-Programms. ROFO-FORTSCHR RONTG 2022. [DOI: 10.1055/s-0042-1749896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- J Vogel-Claussen
- Medizinische Hochschule Hannover, Institut für Radiologie, Hannover
| | - F Lasch
- European Medicines Agency, Amsterdam
| | - A B Bollmann
- Klinik für Pneumologie, Medizinische Hochschule Hannover, Hannover
| | - K May
- Klinik für Radiologie und Nuklearmedizin, UKSH Campus Lübeck, Lübeck
| | - A Kuhlmann
- Center for Health Economics Research Hannover (CHERH), Hannover
| | | | - R Kaaks
- Department of Cancer Epidemiology, German Cancer research Center (DKFZ), Heidelberg
| | - J Barkhausen
- Klinik für Radiologie und Nuklearmedizin, UKSH Campus Lübeck, Lübeck
| | - S Bohnet
- Medizinische Klinik III, UKSH Campus Lübeck, Lübeck
| | - M Reck
- LungenClinic Grosshansdorf GmbH, Großhansdorf
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2
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Bischoff HG, Rückert A, Reinmuth N, Grohé C, Bohnet S, Meyer zum Büschenfelde C. Osimertinib (OSI) vs. Standardtherapie (SoC) EGFR-TKI als Erstlinientherapie bei Patienten mit EGFRm fortgeschrittenem NSCLC. Pneumologie 2018. [DOI: 10.1055/s-0037-1619268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- HG Bischoff
- University Hospital Heidelberg; Thoraxklinik Heidelberg
| | - A Rückert
- Onkologie, Hämatologie, Immunologie, Infektiologie und Palliativmedizin, Klinik für Innere Medizin II, Schwarzwald-Baar-Klinikum, Villingen-Schwenningen
| | - N Reinmuth
- Onkologie der Klinik für Pneumologie, Asklepios Fachkliniken Gauting
| | - C Grohé
- Klinik für Pneumologie, Evangelische Lungenklinik Berlin
| | - S Bohnet
- Medizinische Klinik III, UKSH Lübeck
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3
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Vansteenkiste J, Reungwetwattana T, Nakagawa K, Cho B, Dols M, Cho E, Bertolini A, Bohnet S, Zhou C, Lee K, Nogami N, Okamoto I, Leighl N, Hodge R, McKeown A, Brown A, Rukazenkov Y, Ramalingam S. CNS response to osimertinib vs standard of care (SoC) EGFR-TKI as first-line therapy in patients (pts) with EGFR-TKI sensitising mutation (EGFRm)-positive advanced non-small cell lung cancer (NSCLC): Data from the FLAURA study. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx782] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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4
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Kopeleva O, Parschke P, Wallis S, Bohnet S, Drömann D, Dalhoff K. Retentionspneumonie bei Lungenkarzinom – Inzidenz und prädiktiver Wert der bronchoskopischen Infektionsdiagnostik. Pneumologie 2015. [DOI: 10.1055/s-0035-1544613] [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] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kenz S, Haas C, Werth S, Bohnet S, Brabant G. High sensitivity to tolvaptan in paraneoplastic syndrome of inappropriate ADH secretion (SIADH). Ann Oncol 2011; 22:2696. [DOI: 10.1093/annonc/mdr431] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Reck M, Pawel JV, Fischer J, Kortsik C, Bohnet S, Eiff MV, Koester W, Thomas M, Deppermann KM. Erlotinib vs. Carboplatin/Vinorelbin bei älteren Patienten (>70 Jahre) mit fortgeschrittenem nichtkleinzelligem Lungenkarzinom (NSCLC): eine randomisierte Phase II Studie der AIO Arbeitsgruppe Thorakale Onkologie. Pneumologie 2011. [DOI: 10.1055/s-0031-1272245] [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] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Reck M, Bohnet S. [Treatment of small-cell lung cancer]. Internist (Berl) 2011; 52:130, 132-4, 136-7. [PMID: 21240475 DOI: 10.1007/s00108-010-2696-0] [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: 10/18/2022]
Abstract
Treatment of small cell lung cancer (SCLC) is based on the stage of disease. While combination of chemo- and radiotherapy preferably as concomitant chemoradiotherapy represents standard treatment in patients with locally advanced tumors (UICC stage I-III), patients with metastatic disease (stage IV) should be treated with an established platinum based chemotherapy regimen. After chemotherapy and in case of an achieved tumor response treatment should be completed by an adjuvant radiation of the brain in patients with adequate performance status. In patients with a very early stage of disease without involvement of lymph node metastasis a surgical approach in combination with an adjuvant chemotherapy can be discussed. In patients with relapsed tumors second line therapies like the topoisomerase I inhibitor Topotecan have proven efficacy. Up to now neither molecular targeted therapies nor cytotoxic or immunological maintenance strategies have provided any benefit to patients with SCLC.
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Affiliation(s)
- M Reck
- Krankenhaus Grosshansdorf, Zentrum für Pneumologie und Thoraxchirurgie, Grosshansdorf, Deutschland.
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Reck M, Von Pawel J, Fischer JR, Kortsik C, Bohnet S, von Eiff M, Koester W, Thomas M, Schnabel P, Deppermann KM. Erlotinib versus carboplatin/vinorelbine in elderly patients (age 70 or older) with advanced non-small cell lung carcinoma (NSCLC): A randomized phase II study of the German Thoracic Oncology Working Group. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.7565] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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9
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Vansteenkiste JF, Brümmendorf T, Schuette W, Guigay J, Waller CF, Mesia R, Germonpre P, Bohnet S, Vermorken JB. Safety of different regimens of the novel integrin inhibitor cilengitide combined with cetuximab and platinum-based chemotherapies. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e18067] [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: 11/20/2022] Open
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Braun J, Dinkelacker C, Bohnet S, Kreft B, Dalhoff K. 1,25-dihydroxycholecalciferol stimulates ICAM-1 expression of human alveolar macrophages in healthy controls and patients with sarcoidosis. Lung 1999; 177:139-49. [PMID: 10192761 DOI: 10.1007/pl00007635] [Citation(s) in RCA: 5] [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: 11/27/2022]
Abstract
Synthesis and release of 1,25-dihydroxycholecalciferol (1, 25-(OH)2D2) by alveolar macrophages (AM) have been shown to be increased in granulomatous lung disease. ICAM-1 plays a major part in leukocyte homing to sites of chronic inflammation, which is a crucial step during the inflammatory response. Whether 1,25-(OH)2D2 alters the ICAM-1 expression of AM in humans has not been studied. Bronchoalveolar lavage (BAL) was performed in 12 healthy volunteers, in 13 patients with sarcoidosis (active disease n = 8, inactive disease n = 5), and in 9 patients with chronic bronchitis. AM were incubated with different concentrations of 1,25-(OH)2D2 (10(-11) to 10(-6) M) with and without priming with interferon-gamma (IFN-gamma) and with and without preincubation with 10(-8) M dexamethasone. In addition, the metabolites of vitamin D, 24, 25-dihydroxycholecalciferol and 25-hydroxycholecalciferol, were used. The AM expression of ICAM-1 (cELISA) and the release of tumor necrosis factor-alpha (TNF-alpha) (bioassay) by AM were determined. In healthy volunteers the ICAM-1 expression on AM was significantly and dose-dependently increased by 1,25-(OH)2D2, but not by 24, 25-dihydroxycholecalciferol and 25-hydroxycholecalciferol. Priming with IFN-gamma resulted in an additive effect. Preincubation with dexamethasone inhibited ICAM-1 expression. Addition of 1,25-(OH)2D2 after inhibition by dexamethasone increased ICAM-1 expression significantly. TNF-alpha secretion of AM from healthy volunteers was significantly reduced by 1,25-(OH)2D2. In sarcoidosis patients ICAM-1 expression was significantly higher compared with healthy volunteers. Incubation with 1,25-(OH)2D2 resulted in a further significant increase of ICAM-1 expression. TNF-alpha secretion of AM was increased compared with healthy volunteers. 1,25-(OH)2D2 reduced TNF-alpha secretion; however, this difference was not significant. 1, 25-(OH)2D2 has an immunomodulating effect on human AM both in healthy volunteers and in sarcoidosis patients with enhanced expression of ICAM-1. It may serve as an autocrine mediator in inflammatory lung disease.
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Affiliation(s)
- J Braun
- Department of Medicine II, Medical University of Lübeck, Ratzeburger Allee 160, D-23538 Lübeck, Germany
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Redecke V, Dalhoff K, Bohnet S, Braun J, Maass M. Interaction of Chlamydia pneumoniae and human alveolar macrophages: infection and inflammatory response. Am J Respir Cell Mol Biol 1998; 19:721-7. [PMID: 9806736 DOI: 10.1165/ajrcmb.19.5.3072] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The obligate intracellular pathogen Chlamydia pneumoniae is associated with chronic respiratory, atherosclerotic, and rheumatic disease. The alveolar macrophage (AM) is a potential target cell for the pathogen and may contribute to respiratory immunopathology. We therefore investigated in vitro the interaction between chlamydiae and macrophages with cocultures of C. pneumoniae and AM from 12 healthy volunteers. Inflammatory responses were evaluated through lucigenin-amplified chemiluminescence; secretion of tumor necrosis factor-alpha (TNF-alpha), interleukin-1beta (IL-1beta), and interleukin 8 (IL-8); and expression of intercellular adhesion molecule-1 (ICAM-1) and human leukocyte antigen-DR (HLA-DR). C. pneumoniae readily induced productive infection in the AM. Inclusions containing replicating pathogens could be maintained for up to 120 h. Morphologically similar infection patterns were seen ex vivo in AM collected from six patients with known C. pneumoniae pneumonia. AM responded to the infection with a marked, dose-dependent release of reactive oxygen species, TNF-alpha, IL-1beta, and IL-8. ICAM-1 expression remained unchanged, but HLA-DR was significantly upregulated. Our data indicate that the release of antimicrobial mediators cannot prevent chlamydial infection and replication in AM, but may be involved in amplification of the local inflammatory response in C. pneumoniae pneumonia.
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Affiliation(s)
- V Redecke
- Department of Medicine II and Institute of Medical Microbiology, Medical University of Lübeck, Lübeck, Germany
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12
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Yao C, Bohnet S, Jasmer DP. Host nuclear abnormalities and depletion of nuclear antigens induced in Trichinella spiralis-infected muscle cells by the anthelmintic mebendazole. Mol Biochem Parasitol 1998; 96:1-13. [PMID: 9851602 DOI: 10.1016/s0166-6851(98)00082-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Infection by the parasitic nematode Trichinella spiralis induces cell cycle repositioning (chronic suspension in apparent G2/M) and genetic reprogramming in differentiated mammalian skeletal muscle cells. These changes occur in association with dramatic enlargement of infected host cell nuclei (as large as 17 microm in diameter) and nucleoli. Nuclear antigens (NA) that colocalize with host chromatin have been detected by antibodies to T. spiralis antigens, but the functions of these NA are unresolved. Mebendazole (MBZ) preferentially binds parasite versus host beta-tubulins, is implicated in inhibiting secretion in nematodes and induces cytoplasmic changes in muscle cells infected with T. spiralis. These infected cell changes might be indirect via MBZ inhibition of parasite secretions. This effect would have implications for host/parasite interactions and was evaluated here. MBZ treatment of chronically infected mice caused: (1) a significant deformation of host nuclei and diminution of nucleoli by 4 and 6 days of treatment (dot), respectively; (2) a reduction of nuclear lamins A/C in infected cell nuclei that was concomitant with nuclear deformation; and (3) significant reductions in total RNA, general protein and acid phosphatase activity levels. These changes were associated with the depletion of NA from host nuclei detected by 4 dot. However, DNA content of infected cell nuclei was not detectably reduced and muscle gene expression was not reactivated. The cellular changes documented are likely to account for previously described cytoplasmic alterations induced by MBZ. Concomitant depletion of NA from infected cell nuclei suggests a role of these products in regulating nuclear functions of host cells.
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Affiliation(s)
- C Yao
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman 99164-7040, USA
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Bohnet S, Kötschau U, Braun J, Dalhoff K. Role of interleukin-8 in community-acquired pneumonia: relation to microbial load and pulmonary function. Infection 1997; 25:95-100. [PMID: 9108184 PMCID: PMC7101691 DOI: 10.1007/bf02113584] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/1996] [Accepted: 12/16/1996] [Indexed: 02/04/2023]
Abstract
In pneumonia local phagocyte activation is crucial for clearing of pathogenic microorganisms. In this context alveolar macrophage interleukin-8 secretion, phagocyte oxidative response and concentrations of lavage proteins were quantified, including interleukin-8, in 31 patients with pneumonia, 13 age matched patients with peripheral lung consolidation and six healthy volunteers; these findings were related to the impairment of gas exchange and the bacterial load in the alveolar space. Increased interleukin-8 levels were found in bronchoalveolar lavage fluid (BALF) and in alveolar macrophage supernatants from patients with pneumonia (214 ng/10(5) AM +/- 121 vs 71 ng/10(5) AM +/- 35 and 66 ng/10(5) AM +/- 30, p < 0.05). Interleukin-8 release from alveolar macrophages correlated with the upregulated spontaneous luminol enhanced oxidative response of pulmonary phagocytes but not with the neutrophil count in BALF. In pneumonia patients a significant difference was found between patients with 10(4) or more colony forming units (CFU)/ml BALF of one pathogen and patients with less CFU or nonspecific microbiological results (261 ng/10(5) AM +/- 89 vs 179 ng/10(5) AM +/- 81 and 7.5 ng/ml BALF +/- 17 vs 0.44 ng/ml BALF +/- 1, p < 0.05). Further, a negative correlation between interleukin-8 release of alveolar macrophages and the arterial pO2 at the time of BALF could be demonstrated (r = -0.47, p < 0.05). The results demonstrate local cellular activation in community-acquired pneumonia, which is related to the bacterial load in the alveolar space and to impairment of gas exchange. This is consistent with the hypothesis that pulmonary phagocytes play a central role in the pathogenesis of bacterial pneumonia, contributing not only to bacterial clearing but also to local tissue damage.
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Affiliation(s)
- S Bohnet
- Medizinische Klinik II, Medizinische Universität zu Lübeck, Germany
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Abstract
In acquired immune deficiency syndrome (AIDS) patients, alveolar macrophages (AMs) have an increased ability to serve as accessory cells during the generation of an immune response. In addition to soluble mediators, like cytokines, molecules of the major histocompatibility complex (MHC) class II and adhesion molecules, like intercellular adhesion molecule-1 (ICAM-1), play a major role in the regulation of these cellular interactions. Using an enzyme-linked immunosorbent assay (ELISA) technique and immunocytochemical staining, we investigated ICAM-1 and human leucocyte antigen-DR (HLA-DR) expression on AMs from 20 AIDS (HIV+) patients in context with other parameters of macrophage activation, such as tumour necrosis factor-alpha (TNF-alpha) secretion and the release of superoxide anion, comparing the results to a group of healthy volunteers. In addition, we quantified soluble ICAM-1 in the bronchoalveolar lavage fluid (BALF) using a commercially available kit. We found a nearly twofold increase in ICAM-1 expression (0.81 +/- 0.30 (SD) versus 0.42 +/- 0.12 ELISA units (EU) (mean +/- SD)), whilst the number of HLA-DR+ AMs was slightly decreased in AIDS-patients (80 +/- 5 versus 89 +/- 3%). Furthermore, soluble ICAM-1 in the BALF of these patients was significantly increased (41.9 +/- 26.1 versus 19.1 +/- 5.1 ng.ml-1). ICAM-1 levels on AMs in the patient group correlated strongly with the sodium fluoride triggered release of superoxide anion (O2-) but not with the spontaneous secretion of TNF-alpha by AMs.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- S Bohnet
- Dept of Internal Medicine, Medical University of Lübeck, Germany
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Dalhoff K, Bohnet S, Braun J, Kreft B, Wiessmann KJ. Intercellular adhesion molecule 1 (ICAM-1) in the pathogenesis of mononuclear cell alveolitis in pulmonary sarcoidosis. Thorax 1993; 48:1140-4. [PMID: 7905208 PMCID: PMC464902 DOI: 10.1136/thx.48.11.1140] [Citation(s) in RCA: 17] [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: 01/27/2023]
Abstract
BACKGROUND Alveolitis in pulmonary sarcoidosis is characterised by an accumulation of highly activated macrophages and CD4+ lymphocytes in the alveolar compartment. The role of intercellular adhesion molecule 1 (ICAM-1) expression on alveolar cells has been studied in this context. METHODS Using a sandwich ELISA technique, ICAM-1 expression on alveolar macrophages from 17 consecutive untreated patients with pulmonary sarcoidosis and six healthy normal volunteers was quantified. In addition, parameters of macrophage activation (tumour necrosis factor alpha (TNF alpha) and superoxide anion release) were evaluated. RESULTS Significantly elevated expression could be demonstrated on alveolar macrophages from patients with pulmonary sarcoidosis compared with healthy controls (mean (SD) 0.74 (0.24) ELISA units (EU) v 0.46 (0.12) EU). On subdividing the patients into those with active and those with inactive disease, only the former showed increased ICAM-1 levels on alveolar macrophages (0.82 (0.27) EU) compared with control alveolar macrophages. No differences were detected in serum levels of soluble ICAM-1 between patients and controls. ICAM-1 expression on alveolar macrophages from patients with sarcoidosis correlated with the spontaneous release of TNF alpha but not with the release of the superoxide anion by the activated macrophages. There was no correlation with the percentage of lymphocytes or the absolute number of CD4+ cells in bronchoalveolar lavage fluid. CONCLUSIONS Increased ICAM-1 surface expression on alveolar macrophages reflects disease activity in the pulmonary compartment. Considering the significance of adhesion molecules during antigen presentation and lymphocyte activation, ICAM-1 expression on alveolar macrophages may have an important role in the immune process of pulmonary sarcoidosis.
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Affiliation(s)
- K Dalhoff
- Department of Internal Medicine, Medical University of Lübeck, Germany
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Kreft B, Bohnet S, Carstensen O, Hacker J, Marre R. Differential expression of interleukin-6, intracellular adhesion molecule 1, and major histocompatibility complex class II molecules in renal carcinoma cells stimulated with S fimbriae of uropathogenic Escherichia coli. Infect Immun 1993; 61:3060-3. [PMID: 8099898 PMCID: PMC280959 DOI: 10.1128/iai.61.7.3060-3063.1993] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [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: 01/28/2023] Open
Abstract
The production of interleukin-6, intracellular adhesion molecule 1, and major histocompatibility complex class II molecules by a renal carcinoma cell line (ACHN) in response to S fimbriae of uropathogenic Escherichia coli was studied. S fimbriae adhered to ACHN cells and stimulated the production of interleukin-6 and intercellular adhesion molecule 1 but did not affect major histocompatibility complex class II expression by renal carcinoma cells. Our data demonstrate that S fimbriae of E. coli display immunomodulating properties on kidney-derived epithelial cells.
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Affiliation(s)
- B Kreft
- Klinik für Innere Medizin, Medizinischen Universität zu Lübeck, Germany
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Abstract
The role of the major secretory protein of Legionella pneumophila, a zinc protease, in Legionella infection is not known. Since an important step of the host reaction in Legionnaires' disease is the production of tumor necrosis factor-alpha (TNF-alpha) by alveolar macrophages, we studied the interaction of Legionella protease and U-937 cells with respect to TNF-alpha. The Legionella protease was purified by fractionated precipitation, gel filtration and hydrophobic interaction chromatography. The purified enzyme was added to U-937 cells, a promyelocytic cell line. In the supernatants of PMA-treated U-937 cells we found low concentrations of TNF-alpha after incubation with protease. Therefore we pursued the hypothesis of direct enzymatic degradation of TNF-alpha by Legionella protease. Enzymatic cleavage of TNF-alpha was proven by SDS-PAGE, ELISA and TNF-alpha bioassay with L-929 cells. The degradation of TNF-alpha by the Legionella protease was shown in all three systems. Enzymatic degradation of TNF-alpha might be important for the pathogenesis of Legionnaires' disease.
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Affiliation(s)
- W Hell
- Institute for Medical Microbiology, Medical University of Lübeck, Germany
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Bohnet S, Huster-Zilz A, Bay A. [Clinical care of children with burns or scalds]. Dtsch Krankenpflegez 1992; 45:768-72. [PMID: 1468372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Kreft B, Carstensen O, Straube E, Bohnet S, Hacker J, Marre R. Adherence to and cytotoxicity of Escherichia coli for eucaryotic cell lines quantified by MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide). Zentralbl Bakteriol 1992; 276:231-42. [PMID: 1559011 DOI: 10.1016/s0934-8840(11)80010-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Adherence of Escherichia coli to human epithelial cells (HEp-2) was studied using MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide) which is cleaved by enzymes of eucaryotic or procaryotic cells to formazan. This method allows to quantify adherence of Escherichia coli to HEp-2 cells and offers the advantage of assaying a large number of eucaryotic cells without using specific antisera or radioactive material. Furthermore, toxic effects of isolated hemolysin cloned in Escherichia coli onto a renal tubular cell line (LLC-PK1) was investigated by this method, showing reduced cellular viability of tubular cells after an incubation period of 10 to 20 min. MTT is therefore considered to be useful to assay the adherence of Escherichia coli to eucaryotic cells and to quantify toxic effects in eucaryotic cells induced by bacterial virulence factors.
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Affiliation(s)
- B Kreft
- Klinik für Innere Medizin, Medizinische Universität zu Lübeck
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20
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Bohnet S, Rogers L, Sasaki G, Kolattukudy PE. Estradiol induces proliferation of peroxisome-like microbodies and the production of 3-hydroxy fatty acid diesters, the female pheromones, in the uropygial glands of male and female mallards. J Biol Chem 1991; 266:9795-804. [PMID: 2033066] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
During the mating season the female mallards produce sex pheromones, diesters of 3-hydroxy fatty acids, in their uropygial glands. Subcellular fractionation by sucrose and Nycodenz density gradient centrifugations and electron microscopic examination of the fractions showed that diesters of 3-hydroxy acids and the enzymes that catalyze the formation and esterification of the 3-hydroxy fatty acids are located in the catalase-containing fractions, probably peroxisomes, whereas monoester synthesizing activities are located in the endoplasmic reticulum. Fatty acyl-CoA reductase that would provide fatty alcohol needed for the synthesis of monoester and diester waxes was found both in the peroxisomal and endoplasmic reticulum fraction. Upon daily intramuscular injection of estradiol into the females in the nonmating season, the short chain monoester waxes of the uropygial glands were replaced by long chain monoester waxes, and subsequently the monoester waxes were replaced by diester waxes. Injection of thyroxine with estradiol hastened the induction of the compositional changes including diester synthesis. Similar changes, including the synthesis of the female pheromones, were induced in the uropygial glands by the hormone treatment of males that do not normally produce diesters at any time during their life cycle. The structure and composition of the diesters induced by hormone treatment of both males and females were identical to those of the female pheromones produced during their mating season. Electron microscopic examination of diaminobenzidine-treated glands showed that peroxisomes proliferated in the gland of the females in the mating season and in the estradiol-treated males that produce the diesters.
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Affiliation(s)
- S Bohnet
- Ohio State Biotechnology Center, Ohio State University, Columbus 43210
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Abstract
Major alterations are induced in muscle cells infected by either Trichinella spiralis or Trichinella pseudospiralis. To investigate the response of muscle to these infections we have analyzed the expression of acid phosphatase (ACP, EC 3.1.3.2), adult skeletal muscle myosin heavy chain, and muscle tropomyosin proteins in infected mouse skeletal muscle cells. Using T. spiralis-infected cells, we provide strong evidence that the tartrate-sensitive ACP of these cells was synthesized by the infected cell and localized in lysosomes. Isoenzyme analysis indicated that the ACP activity was of host muscle cell origin and the specific activity of this ACP was 2.5 times greater than that in associated inflammatory cells. Increased ACP activity was also demonstrated in muscle cells infected by T. pseudospiralis. In synchronized muscle infections, increased ACP activity was detected at 5 days post-muscle infection for both parasites. ACP activity was further increased in infected muscle cells at later times tested. This increased infected cell ACP activity represents the earliest positive enzyme marker yet described indicating expression of the infected cell phenotype. In contrast, myofibrillar proteins were not detected in muscle cells chronically infected by T. spiralis but were detected in muscle cells infected by T. pseudospiralis. Decrease in myofibrillar protein levels was detected by 10 days post-muscle infection by T. spiralis. The data presented demonstrate significant differences and similarities in the phenotypes of muscle cells infected by these two parasites and establish criteria that could facilitate identification of parasite factors that may be involved in these phenomena.
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Affiliation(s)
- D P Jasmer
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99164-7040
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Kolattukudy PE, Bohnet S, Sasaki G, Rogers L. Developmental changes in the expression of S-acyl fatty acid synthase thioesterase gene and lipid composition in the uropygial gland of mallard ducks (Anas platyrhynchos). Arch Biochem Biophys 1991; 284:201-6. [PMID: 1989497 DOI: 10.1016/0003-9861(91)90284-p] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Developmental changes in the composition of the uropygial gland secretory lipids of the postembryonic mallard ducks (Anas platyrhynchos) were determined. During the first 3 weeks after hatching, the composition of the secretory lipids remained constant; the lipids consisted of long-chain wax esters composed of a complex mixture of n-, monomethyl, and dimethyl fatty acids esterified to n-C16 and n-C18 fatty alcohols. Afterward, as the ducks began to acquire adult feathers, short-chain wax esters composed of 2- and 4-monomethyl fatty acids began to appear with 2-methylhexanoyl and 4-methylhexanoyl as the major acyl components; esters of short-chain monomethyl fatty acids (less than or equal to C12) constituted 90% of the lipids when the ducks were 2 months old and had acquired adult plumage. The appearance of the short-chain acids in the acyl portion of the wax esters was accompanied by the appearance of S-acyl fatty acid synthase thioesterase, which can hydrolytically release short-chain acids from fatty acid synthase in the gland. Northern blot analysis showed that the gland-specific thioesterase gene transcripts began to appear in the gland only 3 weeks after hatching. The appearance of the transcripts and immunologically detectable thioesterase protein reached maximum levels 2 months after hatching, with the acquisition of the adult plumage. Thus, the developmental changes in lipid composition correlated with the changes in the level of expression of the thioesterase gene. Expression of other gland-specific genes has been previously found to begin just prior to hatching. The gland-specific thioesterase is the first case of delayed expression of a gland-specific gene.
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Affiliation(s)
- P E Kolattukudy
- Ohio State Biotechnology Center, Ohio State University, Columbus 43210
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Kolattukudy PE, Bohnet S, Rogers L. Diesters of 3-hydroxy fatty acids produced by the uropygial glands of female mallards uniquely during the mating season. J Lipid Res 1987; 28:582-8. [PMID: 3598400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The uropygial gland secretions produced by female mallards (Anas platyrhynchos) throughout the year were analyzed by thin-layer chromatography and combined gas-liquid chromatography and mass spectrometry. Most of the year, the secretion was composed of wax esters. With the beginning of the mating season in the middle of March, a polar component appeared which became the dominant and sole component of the secretion through April and May and as the mating season ended in June, wax esters became the sole component of the secretion. The polar components were identified to be diesters of n-C8, n-C10, and n-C12 3-hydroxy acids with n-C16 and n-C18 alcohols and n-C6 to C16 even chain acids. Immediately after the diester-producing period the female uropygial glands produced very long chain wax esters composed of fatty acids longer than C12. By the end of August, shorter chain wax esters composed of C6 and C12 acids became the dominant components of the secretion and this composition, previously considered characteristic of mallards, remained constant until March. The observed disappearance of the short chain waxes during the postnuptial period is similar to that in males. The dramatic changes in the composition of the uropygial glands similar to those observed in the female mallards during the mating season have not yet been observed in any other species.
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Kolattukudy PE, Bohnet S, Rogers L. Diesters of 3-hydroxy fatty acids produced by the uropygial glands of female mallards uniquely during the mating season. J Lipid Res 1987. [DOI: 10.1016/s0022-2275(20)38683-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Kolattukudy PE, Bohnet S, Rogers L. Disappearance of short chain acids from the preen gland wax of male mallard ducks during eclipse. J Lipid Res 1985; 26:989-94. [PMID: 4045323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Wax esters constitute the major products of the uropygial glands of male mallard ducks (Anas platyrhynchos). Combined gas-liquid chromatography and mass spectrometry of the acyl and alcohol portions of the wax ester revealed dramatic seasonal variation. Of the total of nearly 100 compounds detected in the acyl portion, more than 90 were identified as n-, monomethyl-, dimethyl-, and trimethyl-C6 to C20 acids. The major components were 2-methyl- and 4-methyl C6 acids which constituted nearly 75% of the total acids during most of the year. As the birds went through the post-nuptial molt into eclipse, these short chain acids decreased to only 4% of the total acids. Fatty acids longer than C12 became the major components during the summer months when the birds were in eclipse and by fall the characteristic shorter branched acids reappeared as the dominant components. Fatty alcohols did not undergo such dramatic changes. This is the first report of biochemical changes that occur during eclipse.
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Kolattukudy PE, Bohnet S, Rogers L. Disappearance of short chain acids from the preen gland wax of male mallard ducks during eclipse. J Lipid Res 1985. [DOI: 10.1016/s0022-2275(20)34303-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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