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Flury M, Schweigel J, Näke A, Hübner A. Lipoprotein a – pathogenetischer Faktor in der Entstehung des Diabetes mellitus im Kindesalter? DIABETOL STOFFWECHS 2006. [DOI: 10.1055/s-2006-944026] [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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Strauß M, Koehler K, Krumbholz M, Hübner A, Zierz S, Deschauer M. Allgrove-Syndrom als seltene Differentialdiagnose einer juvenilen ALS. AKTUELLE NEUROLOGIE 2006. [DOI: 10.1055/s-2006-953331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hübner S, Eam JE, Hübner A, Jans DA. Laminopathy-inducing lamin A mutants can induce redistribution of lamin binding proteins into nuclear aggregates. Exp Cell Res 2005; 312:171-83. [PMID: 16289535 DOI: 10.1016/j.yexcr.2005.10.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2005] [Revised: 10/09/2005] [Accepted: 10/13/2005] [Indexed: 10/25/2022]
Abstract
Lamins, members of the family of intermediate filaments, form a supportive nucleoskeletal structure underlying the nuclear envelope and can also form intranuclear structures. Mutations within the A-type lamin gene cause a variety of degenerative diseases which are collectively referred to as laminopathies. At the molecular level, laminopathies have been shown to be linked to a discontinuous localization pattern of A-type lamins, with some laminopathies containing nuclear lamin A aggregates. Since nuclear aggregate formation could lead to the mislocalization of proteins interacting with A-type lamins, we set out to examine the effects of FLAG-lamin A N195K and R386K protein aggregate formation on the subnuclear distribution of the retinoblastoma protein (pRb) and the sterol responsive element binding protein 1a (SREBP1a) after coexpression as GFP-fusion proteins in HeLa cells. We observed strong recruitment of both proteins into nuclear aggregates. Nuclear aggregate recruitment of the NPC component nucleoporin NUP153 was also observed and found to be dependent on the N-terminus. That these effects were specific was implied by the fact that a number of other coexpressed karyophilic GFP-fusion proteins, such as the nucleoporin NUP98 and kanadaptin, did not coaggregate with FLAG-lamin A N195K or R386K. Immunofluorescence analysis further indicated that the precursor form of lamin A, pre-lamin A, could be found in intranuclear aggregates. Our results imply that redistribution into lamin A-/pre-lamin A-containing aggregates of proteins such as pRb and SREBP1a could represent a key aspect underlying the molecular pathogenesis of certain laminopathies.
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Hübner A, Yang X, Nolen DM, Popova TG, Cabello FC, Norgard MV. Expression of Borrelia burgdorferi OspC and DbpA is controlled by a RpoN-RpoS regulatory pathway. Proc Natl Acad Sci U S A 2001; 98:12724-9. [PMID: 11675503 PMCID: PMC60121 DOI: 10.1073/pnas.231442498] [Citation(s) in RCA: 280] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2001] [Indexed: 11/18/2022] Open
Abstract
RpoS and RpoN are two alternative sigma factors typically associated with general stress responses in bacteria. To date, there has been no experimental evidence that RpoS and RpoN can directly control the expression of one another. Herein, using a combined strategy of gene disruption and genetic complementation targeting rpoN and rpoS in Borrelia burgdorferi strain 297, we describe a regulatory network for B. burgdorferi. In this network, RpoN controls the expression of RpoS, which, in turn, governs the expression of two important membrane lipoproteins, outer surface protein C and decorin-binding protein A, and likely other proteins of B. burgdorferi. Our findings provide a foundation for elucidating further key regulatory networks that potentially impact many aspects of B. burgdorferi's parasitic strategy, host range, and virulence expression.
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Steiner G, Sablinskas V, Hübner A, Kuhne C, Salzer R. Surface plasmon resonance imaging of microstructured monolayers. J Mol Struct 1999. [DOI: 10.1016/s0022-2860(99)00226-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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31
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Hübner A, Danganan CE, Xun L, Chakrabarty AM, Hendrickson W. Genes for 2,4,5-trichlorophenoxyacetic acid metabolism in Burkholderia cepacia AC1100: characterization of the tftC and tftD genes and locations of the tft operons on multiple replicons. Appl Environ Microbiol 1998; 64:2086-93. [PMID: 9603818 PMCID: PMC106282 DOI: 10.1128/aem.64.6.2086-2093.1998] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Burkholderia cepacia AC1100 uses the chlorinated aromatic compound 2, 4,5-trichlorophenoxyacetic acid (2,4,5-T) as a sole source of carbon and energy. The enzyme which converts the first intermediate in the pathway, 2,4,5-trichlorophenol, to 5-chlorohydroquinone has been purified and consists of two subunits of 58 and 22 kDa, encoded by the tftC and tftD genes (48). A degenerate primer was designed from the N terminus of the 58-kDa polypeptide and used to isolate a clone containing the tftC and tftD genes from a genomic library of AC1100. The derived amino acid sequences of tftC and tftD show significant homology to the two-component monooxygenases HadA of Burkholderia pickettii, HpaBC of Escherichia coli, and HpaAH of Klebsiella pneumonia. Expression of the tftC and tftD genes appeared to be induced when they were grown in the presence of 2,4,5-T, as shown by RNA slot blot and primer extension analyses. Three sets of cloned tft genes were used as probes to explore the genomic organization of the pathway. Pulsed-field gel electrophoresis analyses of whole chromosomes of B. cepacia AC1100 demonstrated that the genome is comprised of five replicons of 4.0, 2.7, 0.53, 0.34, and 0.15 Mbp, designated I to V, respectively. The tft genes are located on the smaller replicons: the tftAB cluster is on replicon IV, tftEFGH is on replicon III, and copies of the tftC and the tftCD operons are found on both replicons III and IV. When cells were grown in the absence of 2,4,5-T, the genes were lost at high frequency by chromosomal deletions and rearrangements to produce 2,4,5-T-negative mutants. In one mutant, the tftA and tftB genes translocated from one replicon to another, with the concomitant loss of tftEFGH and one copy of tftCD.
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Hübner A, Hendrickson W. A fusion promoter created by a new insertion sequence, IS1490, activates transcription of 2,4,5-trichlorophenoxyacetic acid catabolic genes in Burkholderia cepacia AC1100. J Bacteriol 1997; 179:2717-23. [PMID: 9098071 PMCID: PMC179022 DOI: 10.1128/jb.179.8.2717-2723.1997] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Transposition and transcriptional activation by insertion sequences in Burkholderia cepacia AC1100 were investigated. Two closely related new elements, IS1413 and IS1490, were identified and characterized. These elements are not highly related to other insertion sequences identified in AC1100 or other B. cepacia isolates. Based on their structures and the sequences of the inverted terminal repeats and the putative transposase protein, the insertion elements (IS elements) are similar to IST2 of Thiobacillus ferrooxidans and several related elements. All the IS elements that have been identified in this strain are found in multiple copies (10 to 40), and they have high-level promoter activity capable of stimulating transcription from a distance up to 500 bp from a target gene. Strain AC1100 was originally isolated after prolonged selection for the ability to utilize the herbicide 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) as a sole carbon source. Three IS elements are located near the first gene of the 2,4,5-T catabolic pathway, tftA. IS1490 inserted 110 bp upstream of tftA and created a fusion promoter responsible for constitutive transcription of the gene. Our results confirm the hypothesis that IS elements play a central role in transcription of 2,4,5-T genes and likely have stimulated rapid evolution of the metabolic pathway.
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Daubaras DL, Danganan CE, Hübner A, Ye RW, Hendrickson W, Chakrabarty AM. Biodegradation of 2,4,5-trichlorophenoxyacetic acid by Burkholderia cepacia strain AC1100: evolutionary insight. Gene 1996; 179:1-8. [PMID: 8955624 DOI: 10.1016/s0378-1119(96)00326-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Many microorganisms in nature have evolved new genes which encode catabolic enzymes specific for chlorinated aromatic substrates, allowing them to utilize these compounds as sole sources of carbon and energy. An understanding of the evolutionary mechanisms involved in the acquisition of such genes may facilitate the development of microorganisms with enhanced capabilities of degrading highly chlorinated recalcitrant compounds. A number of studies have been based on microorganisms isolated from the environment which utilize simple chlorinated substrates. In our laboratory, a selective technique was used to isolate microorganisms capable of degrading highly chlorinated compounds, such as 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), as sole sources of carbon and energy. This article summarizes the genetic and biochemical information obtained regarding the pathway of degradation, the mechanism of recruitment of new genes, and the organization of the degradative genes. In addition, we discuss the potential practical application of such microorganisms in the environment.
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Terres W, Lund GK, Hübner A, Ehlert A, Reuter H, Hamm CW. Endogenous tissue plasminogen activator and platelet reactivity as risk factors for reocclusion after recanalization of chronic total coronary occlusions. Am Heart J 1995; 130:711-6. [PMID: 7572577 DOI: 10.1016/0002-8703(95)90068-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A prospective study was performed to investigate the role of the endogenous fibrinolytic system and platelet function for the occurrence of reocclusion after successful recanalization of chronic coronary occlusions. At control coronary angiography 8 +/- 2 weeks after recanalization, reocclusion was found in 10 (21%) of 47 patients. After correction for angiographic and clinical confounding factors, endogenous concentrations of tissue plasminogen activator (TPA) were lower in patients with reocclusion than in patients without. In contrast, plasma levels of plasminogen activator inhibitor-1 and alpha 2-antiplasmin were similar in the two groups. The mean platelet volume was significantly higher in patients with reocclusion than in patients without. In addition, agonist-induced platelet aggregation in platelet-rich plasma was enhanced in the patients with reocclusion. Decreased endogenous plasma TPA concentrations and enhanced platelet reactivity may contribute to the occurrence of reocclusion after primarily successful coronary artery recanalization.
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Bach D, van den Berg-Segers A, Hübner A, van Breukelen G, Cesana M, Plétan Y. Rufloxacin once daily versus ciprofloxacin twice daily in the treatment of patients with acute uncomplicated pyelonephritis. J Urol 1995; 154:19-24. [PMID: 7776420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
PURPOSE We compare the bacteriological and clinical efficacy of rufloxacin and ciprofloxacin in patients with acute uncomplicated pyelonephritis. MATERIALS AND METHODS A total of 110 outpatients was enrolled in a randomized, double-blind multicenter study and treated for 10 days with 200 mg. rufloxacin daily (after a loading dose of 400 mg. on day 1) or 500 mg. ciprofloxacin twice daily. Bacteriological and clinical efficacy was based on the accumulated outcomes assessed at the end of treatment, and at 2 and 4 to 6 weeks. RESULTS The bacteriological and clinical success rates of rufloxacin and ciprofloxacin were comparable: 55.6% versus 58.8% and 74% versus 71%, respectively (95% confidence interval -28% to +22% and -20% to +25%, respectively). Both study medications were well tolerated. CONCLUSIONS Rufloxacin once daily is a good alternative in the outpatient treatment of acute uncomplicated pyelonephritis.
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Hübner A, Kruhoffer M, Grosse F, Krauss G. Fidelity of human immunodeficiency virus type I reverse transcriptase in copying natural RNA. J Mol Biol 1992; 223:595-600. [PMID: 1371812 DOI: 10.1016/0022-2836(92)90975-p] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The in vitro fidelity of reverse transcriptase from human immunodeficiency virus type I (HIV-1 RT) upon copying an RNA template was measured using the phi Xam 16 reversion assay. A phi X174 sequence harboring the amber 16 codon was cloned into a transcription vector. RNA obtained from transcription by bacteriophage T7 RNA polymerase was used as a template for RNA-directed DNA synthesis by HIV-1 RT. An imbalance of dNTP concentrations during the reverse transcription step served to distinguish between errors that arose from the transcription step and errors from reverse transcription. The frequency of dGTP.U mismatches was determined to be 1/360, while dGTP.rA mismatches formed at a rate of 1/4600. These are 20-fold and sevenfold higher, respectively, than the error rates determined for the same sequence with a DNA template. Due to a high background of errors in the RNA template originating from the transcription step only upper limits for the frequency of three other mismatches can be given. The data indicate that the reverse transcription step of the HIV-1 replication cycle contributes significantly to the generation of mutant viruses.
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Schumacher GH, Hübner A, Pommerenke F. [What effect does the tongue have on mandibular growth?]. PHILLIP JOURNAL FUR RESTAURATIVE ZAHNMEDIZIN 1988; 5:320-2. [PMID: 2856146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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38
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Hübner A, Holschneider AM. [Multiple endocrine neoplasias in 3 generations]. LANGENBECKS ARCHIV FUR CHIRURGIE 1987; 372:747-50. [PMID: 2893231 DOI: 10.1007/bf01297924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Typical in MEA IIb is a combination of medullary carcinoma of the thyroid gland and a pheochromocytoma with neurocutaneous and skeletal anomalies and a hyperplasia of the sympathetic nervous system of the GI tract with megacolon. Two patients of a family with MEA II are described. The family history reveals 1) an autosomal inheritance with high penetrance, 2) a changing pattern of anomalies in different generations, 3) no marfanoid traits as typical in MEA IIb, 4) only males affected by megacolon. This may be an uncommon variation or an additional type: IIc. Further investigation is required.
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Gülker H, Spyra W, Thale J, Krimphove F, Hübner A, Bender F. Assessment of the electrophysiologic, antiarrhythmic and haemodynamic profile of a new isoquinolinedione derivative. ARZNEIMITTEL-FORSCHUNG 1987; 37:917-9. [PMID: 3675686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The electrophysiological, antiarrhythmic and haemodynamic profile of a new isoquinolinedione derivative, 2,2'-[iminobis(trimethylene)]-di(4,4-dimethyl-1,3-(2H,4H)-isoqu inolinedione) hydrochloride (AR-03 Cl) was evaluated using dog models relevant to conditions in humans. In 16 animals dose-related effects on intercardiac conduction, ventricular refractoriness and on haemodynamic parameters were determined. In another 7 dogs antiarrhythmic actions of AR-03 Cl on delayed reperfusion arrhythmias following release of coronary artery occlusion after 2 h of obstruction were investigated. The results show: AR-03 Cl causes a significant prolongation in conduction through all parts of the conducting system. The AH-interval, HV-interval and QRS-duration are significantly lengthened. Ventricular repolarization is only slightly changed. There are no significant changes in heart rate, systolic and diastolic aortic pressure up to doses of 2 mg/kg b.w. However, left ventricular (dp/dtmax) and cardiac output are significantly reduced, and left ventricular enddiastolic pressure is increased. In acute myocardial necrosis delayed reperfusion arrhythmias are almost completely abolished, the effective dose is lower than that required with any other antiarrhythmic drug investigated so far in this particular experimental set-up. Further experimental and clinical testing of the new compound seems to be promising because of its strong dose-related antiarrhythmic potency. However, there is a need for further analysis of potential haemodynamic side effects of the new compound to establish the clinical significance of negative inotropic actions at therapeutic doses.
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Hübner A, Schöll W, Fischer S. [Passive immunoprophylaxis against coli dysentery of suckling pigs by vaccination of sows with attenuated Escherichia coli mutants. 1. Clinical and laboratory diagnostic results of the combined use of K88- and K99-antigen-containing strains derived from Escherichia coli mutants]. ARCHIV FUR EXPERIMENTELLE VETERINARMEDIZIN 1983; 37:717-27. [PMID: 6362603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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41
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Hübner A, Buchmann K. [The importance of intra-abdominal adhesions for laparoscopy]. ZEITSCHRIFT FUR DIE GESAMTE INNERE MEDIZIN UND IHRE GRENZGEBIETE 1980; 35:255-257. [PMID: 6447416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The explorative laparoscopy has changed the attitude to certain contraindications. Concretions are of importance for the disposition of the penumoperitoneum and for the inspection. Their view is variable and is of importance only after larger intraabdominal interventions. In 218 laparoscopies performed we found 55 times concretions, of them important ones in three fourths. In 90% additional diagnostic points of view could be got.
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42
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Hübner A, Dusold E. [Activity of the "Commission for the Scientific Use of Drugs" on the district level, as demonstrated on the Berlin-Lichtenberg urban district]. DAS DEUTSCHE GESUNDHEITSWESEN 1972; 27:2305-9. [PMID: 4651185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Heinrich HG, Lusch G, Stein H, Hübner A, Kaufhold H, Schwanitz H, Garanin G, Freitag M, Maassen E, Agt C. [Early rehabilitation following myocardial infarct]. DAS DEUTSCHE GESUNDHEITSWESEN 1971; 26:2445-8. [PMID: 5149793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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44
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Hübner A. [Value of aspiration biopsy within the scope of gastrologic diagnostics with regard to personal experiences]. DAS DEUTSCHE GESUNDHEITSWESEN 1971; 26:1345-9. [PMID: 5093324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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45
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Hübner A, Heinrich HG. [Laparoscopy and blind liver puncture as a routine method in the work of a public hospital]. DAS DEUTSCHE GESUNDHEITSWESEN 1971; 26:1305-8. [PMID: 4255460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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46
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Hübner A. [Gallbladder displacement causing a complication in percutaneous liver biopsy]. DAS DEUTSCHE GESUNDHEITSWESEN 1969; 24:2397-9. [PMID: 5375926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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47
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Hübner A. [Beta receptor blockage with special reference to propranolol]. DAS DEUTSCHE GESUNDHEITSWESEN 1969; 24:350-3. [PMID: 5376403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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48
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Hübner A. [On the dextromyocardial infarct]. DAS DEUTSCHE GESUNDHEITSWESEN 1968; 23:2074-2076. [PMID: 5732165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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49
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Fischer I, Hübner A, Maassen E, Müller HJ, Schwanitz H. [Spirometry as a method for the clarification of respiratory insufficiencies. Experiences of a old people's hospital]. DAS DEUTSCHE GESUNDHEITSWESEN 1968; 23:968-72. [PMID: 5685907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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50
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Hübner A, Fischer I, Schwanitz H, Maassen E. [On the significance of stomach suction biopsy]. DAS DEUTSCHE GESUNDHEITSWESEN 1968; 23:925-30. [PMID: 5680328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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