76
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Wenzel M, Ober S, Reuscher A. Umfrage der DGII. Klin Monbl Augenheilkd 2005. [DOI: 10.1055/s-2005-863826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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77
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Wenzel M, Klauke M, Gessenhardt F, Dellweg D, Köhler D. Befeuchter in der nCPAP-Therapie benötigen kein Sterilwasser. Pneumologie 2005. [DOI: 10.1055/s-2004-831121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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78
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Wenzel M, Barchfeld T, Osseiran K, Köhler D. Bronchoskopische Argon-Plasma-Koagulation bei Weaninghindernis durch subglottisches Granulationsgewebe. Pneumologie 2005. [DOI: 10.1055/s-2004-831123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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79
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Wenzel M, Barchfeld T, Osseiran K, Köhler D. Bronchoskopische Argon-Plasma-Koagulation bei Weaninghindernis durch subglottisches Granulationsgewebe. Pneumologie 2004. [DOI: 10.1055/s-2004-831160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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80
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Wenzel M, Klauke M, Gessenhardt F, Dellweg D, Köhler D. Befeuchter in der nCPAP-Therapie benötigen kein Sterilwasser. Pneumologie 2004. [DOI: 10.1055/s-2004-831158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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81
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Wenzel M, Kerl J, Simon A, Dellweg D, Burkard H, Graw W, Röhn U, Barchfeld T, Köhler D. C-Flex – Eine neue Therapiealternative zu CPAP. – Erste Studienergebnisse. Pneumologie 2004. [DOI: 10.1055/s-2004-828901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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82
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Kerl J, Wenzel M, Köhler D. Thermographische Leckagelokalisierung unter Beatmung mit Druckvorgabe (BiPAP-Therapie). Pneumologie 2004. [DOI: 10.1055/s-2004-828915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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83
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Wenzel M. Zum derzeitigen Stand der Katarakt- und refraktiven Chirurgie. Klin Monbl Augenheilkd 2004. [DOI: 10.1055/s-2004-820083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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84
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Wenzel M, Klauke M, Gessenhardt F, Dellweg D, Köhler D. Befeuchter in der nCPAP-Therapie benötigen kein Sterilwasser. Pneumologie 2004. [DOI: 10.1055/s-2004-819614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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85
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Staudenmaier R, Nguyen TH, Kleinsasser N, Wenzel M, Strutz J. Neovaskularisation von Tissue Engineering-Gewebe. Laryngorhinootologie 2004. [DOI: 10.1055/s-2004-823598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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86
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Happ T, Wittenzellner R, Stölzel K, Wenzel M, Staudenmaier R, Rotter N, Ziegelaar B, Berghaus A. Einfluss von Proteinasen und deren Inhibitoren auf das Tissue Engeneering von Knorpeltransplantaten mit Fibrinkleber. Laryngorhinootologie 2004. [DOI: 10.1055/s-2003-818909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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87
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Hilger I, Haag R, Czerney P, Wenzel M, Hansch A, Fritsche C, Kaiser WA. Charakterisierung von Nah-Infrarot fluoreszierenden Farbstoffen für die in-vivo-Applikation. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-827957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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88
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Krieg A, Krieg T, Wenzel M, Schmitt M, Ramp U, Fang B, Gabbert HE, Gerharz CD, Mahotka C. TRAIL-beta and TRAIL-gamma: two novel splice variants of the human TNF-related apoptosis-inducing ligand (TRAIL) without apoptotic potential. Br J Cancer 2003; 88:918-27. [PMID: 12644830 PMCID: PMC2377072 DOI: 10.1038/sj.bjc.6600772] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Tumour necrosis factor (TNF) related apoptosis-inducing ligand (TRAIL/APO2L) is a recently identified member of the TNF family, which induces programmed cell death in a variety of neoplastic cell types, but not in most nonneoplastic cells. In this study, we report on the identification of two novel alternative splice variants of TRAIL in neoplastic and non-neoplastic human cells lacking either exon 3 (TRAIL-beta) or exons 2 and 3 (TRAIL-gamma). In both splice variants, loss of exon 3 resulted in a frame shift generating a stop codon with consecutive extensive truncation in the extracellular domain. Ectopic expression revealed a loss of proapoptotic potential for both alternative splice variants. In contrast to the predominantly cytoplasmatic localisation of GFP-tagged TRAIL-alpha and TRAIL-beta, TRAIL-gamma showed an additional association with the cell surface and nuclear membrane. In conclusion, alternative splicing might be involved in fine tuning of TRAIL-induced apoptosis and underlines the complexity of the TRAIL system.
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89
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Mahotka C, Liebmann J, Wenzel M, Suschek CV, Schmitt M, Gabbert HE, Gerharz CD. Differential subcellular localization of functionally divergent survivin splice variants. Cell Death Differ 2002; 9:1334-42. [PMID: 12478470 DOI: 10.1038/sj.cdd.4401091] [Citation(s) in RCA: 125] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2002] [Revised: 06/13/2002] [Accepted: 06/17/2002] [Indexed: 12/13/2022] Open
Abstract
Survivin is an inhibitor of apoptosis protein (IAP) that is markedly overexpressed in most cancers. We identified two novel functionally divergent splice variants, i.e. non-antiapoptotic survivin-2B and antiapoptotic survivin-deltaEx3. Because survivin-2B might be a naturally occurring antagonist of antiapoptotic survivin variants, we analyzed the subcellular distribution of these proteins. PSORT II analysis predicted a preferential cytoplasmic localization of survivin and survivin-2B, but a preferential nuclear localization of survivin-deltaEx3. GFP-tagged survivin variants confirmed the predicted subcellular localization and additionally revealed a cell cycle-dependent nuclear accumulation of survivin-deltaEx3. Moreover, a bipartite nuclear localization signal found exclusively in survivin-deltaEx3 may support cytoplasmic clearance of survivin-deltaEx3. In contrast to the known association between survivin and microtubules or centromeres during mitosis, no corresponding co-localization became evident for survivin-deltaEx3 or survivin-2B. In conclusion, our study provided data on a differential subcellular localization of functionally divergent survivin variants, suggesting that survivin isoforms may perform different functions in distinct subcellular compartments and distinct phases of the cell cycle.
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91
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Duran R, Ballauff M, Wenzel M, Wegner G. Rigid-rod polymers with flexible side-chains. 6. Ordered phases from solid solutions of two-component blends as investigated by wide-angle x-ray scattering. Macromolecules 2002. [DOI: 10.1021/ma00187a045] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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92
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Wenzel M, Schönig I, Berchtold M, Kämpfer P, König H. Aerobic and facultatively anaerobic cellulolytic bacteria from the gut of the termite Zootermopsis angusticollis. J Appl Microbiol 2002; 92:32-40. [PMID: 11849325 DOI: 10.1046/j.1365-2672.2002.01502.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS To demonstrate the occurrence of cellulolytic bacteria in the termite Zootermopsis angusticollis. METHODS AND RESULTS Applying aerobic cultivation conditions we isolated 119 cellulolytic strains from the gut of Z. angusticollis, which were assigned to 23 groups of aerobic, facultatively anaerobic or microaerophilic cellulolytic bacteria. 16S rDNA restriction fragment pattern and partial 16S rDNA sequence analysis, as well as numerical taxonomy, were used for the assignment of the isolates. The Gram-positive bacteria of the actinomycetes branch could be assigned to the order Actinomycetales including the genera Cellulomonas/Oerskovia, Microbacterium and Kocuria. The Gram-positive bacteria from the order Bacillales belonged to the genera Bacillus, Brevibacillus and Paenibacillus. Isolates related to the genera Afipia, Agrobacterium/Rhizobium, Brucella/Ochrobactrum, Pseudomonas and Sphingomonas/Zymomonas from the alpha-proteobacteria and Spirosoma-like from the "Flexibacteriaceae" represented the Gram-negative bacteria. CONCLUSIONS A cell titre of up to 10(7) cellulolytic bacteria per ml, determined for some isolates, indicated that they may play a role in cellulose digestion in the termite gut in addition to the cellulolytic flagellates and termite's own cellulases. SIGNIFICANCE AND IMPACT OF THE STUDY The impact of bacteria on cellulose degradation in the termite gut has always been a matter of debate. In the present survey we investigated the aerobic and facultatively anaerobic cellulolytic bacteria in the termite gut.
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93
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Thomzig A, Wenzel M, Karschin C, Eaton MJ, Skatchkov SN, Karschin A, Veh RW. Kir6.1 is the principal pore-forming subunit of astrocyte but not neuronal plasma membrane K-ATP channels. Mol Cell Neurosci 2001; 18:671-90. [PMID: 11749042 DOI: 10.1006/mcne.2001.1048] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ATP-sensitive potassium channels (K-ATP channels) directly couple the energy state of a cell to its excitability, are activated by hypoxia, and have been suggested to protect neurons during disturbances of energy metabolism such as transient ischemic attacks or stroke. Molecular studies have demonstrated that functional K-ATP channels are octameric protein complexes, consisting of four sulfonylurea receptor proteins and four pore-forming subunits which are members of the Kir6 family of inwardly rectifying potassium channels. Here we show, using specific antibodies against the two known pore-forming subunits (Kir6.1 and Kir6.2) of K-ATP channels, that only Kir6.1 and not Kir6.2 subunits are expressed in astrocytes. In addition to a minority of neurons, Kir6.1 protein is present on hippocampal, cortical, and cerebellar astrocytes, tanycytes, and Bergmann glial cells. We also provide ultrastructural evidence that Kir6.1 immunoreactivity is primarily localized to distal perisynaptic and peridendritic astrocyte plasma membrane processes, and we confirm the presence of functional K-ATP channels in Bergmann glial cells by slice-patch-clamp experiments. The identification of Kir6.1 as the principal pore-forming subunit of plasma membrane K-ATP channels in astrocytes suggests that these glial K-ATP channels act in synergy with neuronal Kir6.2-mediated K-ATP channels during metabolic challenges in the brain.
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94
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Wenzel M. [Not Available]. SOEMMERRING-FORSCHUNGEN 2001; 3:239-57. [PMID: 11631186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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95
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Wenzel M. A social categorization approach to distributive justice: social identity as the link between relevance of inputs and need for justice. BRITISH JOURNAL OF SOCIAL PSYCHOLOGY 2001; 40:315-35. [PMID: 11593937 DOI: 10.1348/014466601164858] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
What are relevant inputs or criteria for judging entitlements in a given situation? As will be argued, an answer to this central problem of distributive justice must consider the perceiver's self-definition and structuring of the social context, in terms of social categorizations. The construal of the primary category of potential recipients is particularly important as its prototypical dimensions are likely criteria for entitlement judgments. Its representation depends on the perceiver's salient identity. Two studies yielded support for this perspective. In Study 1, students regarded their psychology department's distinctive quality as more important for psychologists than an out-group's quality. When highly identified, they perceived a psychologist who outperformed another on the in-group quality to have a higher entitlement to a job. In Study 2, German participants regarded the European Union's (EU) denial of EU membership to Turkey as more just the more prototypically European they thought Germany was, in contrast to Turkey; and, in turn, they did so the more strongly they identified as Germans. The findings suggest that relevance of inputs and, thus, the justice motive are based on identity concerns.
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96
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Schönhofer B, Barchfeld T, Wenzel M, Köhler D. Long term effects of non-invasive mechanical ventilation on pulmonary haemodynamics in patients with chronic respiratory failure. Thorax 2001. [DOI: 10.1136/thx.56.7.524] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUNDIt is not known whether long term nocturnal mechanical ventilation (NMV) reduces pulmonary hypertension in patients with chronic respiratory failure (CRF).METHODSPulmonary haemodynamics, spirometric values, and gas exchange were studied in 33 patients requiring NMV due to CRF (20 with thoracic restriction, 13 with chronic obstructive pulmonary disease (COPD)) at baseline and after 1 year of NMV given in the volume cycled mode. Patients with COPD also received supplemental oxygen.RESULTSLong term NMV improved gas exchange while lung function remained unchanged. Mean pulmonary artery pressure at rest before NMV was higher in patients with thoracic restriction than in those with COPD (33 (10) mm Hgv 25 (6) mm Hg). After 1 year of NMV mean pulmonary artery pressure decreased in patients with thoracic restriction to 25 (6) mm Hg (mean change –8.5 mm Hg (95% CI –12.6 to –4.3), p<0.01) but did not change significantly in patients with COPD (mean change 2.2 mm Hg (95% CI –0.3 to 4.8)).CONCLUSIONSLong term NMV in CRF improves pulmonary haemodynamics in patients with thoracic restriction but not in patients with COPD.
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Schönhofer B, Barchfeld T, Wenzel M, Köhler D. Long term effects of non-invasive mechanical ventilation on pulmonary haemodynamics in patients with chronic respiratory failure. Thorax 2001; 56:524-8. [PMID: 11413350 PMCID: PMC1746090 DOI: 10.1136/thorax.56.7.524] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND It is not known whether long term nocturnal mechanical ventilation (NMV) reduces pulmonary hypertension in patients with chronic respiratory failure (CRF). METHODS Pulmonary haemodynamics, spirometric values, and gas exchange were studied in 33 patients requiring NMV due to CRF (20 with thoracic restriction, 13 with chronic obstructive pulmonary disease (COPD)) at baseline and after 1 year of NMV given in the volume cycled mode. Patients with COPD also received supplemental oxygen. RESULTS Long term NMV improved gas exchange while lung function remained unchanged. Mean pulmonary artery pressure at rest before NMV was higher in patients with thoracic restriction than in those with COPD (33 (10) mm Hg v 25 (6) mm Hg). After 1 year of NMV mean pulmonary artery pressure decreased in patients with thoracic restriction to 25 (6) mm Hg (mean change -8.5 mm Hg (95% CI -12.6 to -4.3), p<0.01) but did not change significantly in patients with COPD (mean change 2.2 mm Hg (95% CI -0.3 to 4.8)). CONCLUSIONS Long term NMV in CRF improves pulmonary haemodynamics in patients with thoracic restriction but not in patients with COPD.
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Czerney P, Lehmann F, Wenzel M, Buschmann V, Dietrich A, Mohr GJ. Tailor-Made Dyes for Fluorescence Correlation Spectroscopy (FCS). Biol Chem 2001; 382:495-8. [PMID: 11347900 DOI: 10.1515/bc.2001.062] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Two new fluorescent labels are presented that are optimized for excitation with He/Ne laser and red diode lasers. Application in FCS and labeling of proteins and oligomers are demonstrated. A strong rise of quantum yield and emission life time upon binding to biomolecules are characteristic features of the dyes.
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Suschek CV, Bonmann E, Kleinert H, Wenzel M, Mahotka C, Kolb H, Förstermann U, Gerharz CD, Kolb-Bachofen V. Amphotericin B severely affects expression and activity of the endothelial constitutive nitric oxide synthase involving altered mRNA stability. Br J Pharmacol 2000; 131:473-81. [PMID: 11015297 PMCID: PMC1572339 DOI: 10.1038/sj.bjp.0703576] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
The therapeutic use of the antifungal drug amphotericin B (AmB) is limited due to severe side effects like glomerular vasoconstriction and risk of renal failure during AmB administration. As nitric oxide (NO) has substantial functions in renal autoregulation, we have determined the effects of AmB on endothelial constitutive NO synthase (ecNOS) expression and activity in human and rat endothelial cell cultures. AmB used at concentrations of 0.6 to 1.25 microg ml(-1) led to increases in ecNOS mRNA and protein expression as well as NO production. This was the result of an increased ecNOS mRNA half-life. In contrast, incubation of cells with higher albeit subtoxic concentrations of AmB (2.5 - 5.0 microg ml(-1)) resulted in a decrease or respectively in completely abolished ecNOS mRNA and protein expression with a strongly reduced or inhibited ecNOS activity, due to a decrease of ecNOS mRNA half-life. None of the AmB concentrations affected promoter activity as found with a reporter gene construct stably transfected into ECV304 cells. Thus, our experiments show a concentration-dependent biphasic effect of AmB on expression and activity of ecNOS, an effect best explained by AmB influencing ecNOS mRNA stability. In view of the known renal accumulation of this drug the results reported here could help to elucidate its renal toxicity.
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100
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Wenzel M, Mahotka C, Krieg A, Bachmann A, Schmitt M, Gabbert HE, Gerharz CD. Novel survivin-related members of the inhibitor of apoptosis (IAP) family. Cell Death Differ 2000; 7:682-3. [PMID: 11023343 DOI: 10.1038/sj.cdd.4400691] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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