TY  - JOUR
A1  - Scheer, Nico
A1  - Balimane, Praveen
A1  - Hayward, Michael D.
A1  - Buechel, Sandra
A1  - Kauselmann, Gunther
A1  - Wolf, C. Roland
T1  - Generation and Characterization of a Novel Multidrug Resistance Protein 2 Humanized Mouse Line
JF  - Drug Metabolism and Disposition
N2  - The multidrug resistance protein (MRP) 2 is predominantly expressed in liver, intestine, and kidney, where it plays an important role in the excretion of a range of drugs and their metabolites or endogenous compounds into bile, feces, and urine. Mrp knockout [Mrp2(−/−)] mice have been used recently to study the role of MRP2 in drug disposition. Here, we describe the first generation and initial characterization of a mouse line humanized for MRP2 (huMRP2), which is nulled for the mouse Mrp2 gene and expresses the human transporter in the organs and cell types where MRP2 is normally expressed. Analysis of the mRNA expression for selected cytochrome P450 and transporter genes revealed no major changes in huMRP2 mice compared with wild-type controls. We show that human MRP2 is able to compensate functionally for the loss of the mouse transporter as demonstrated by comparable bilirubin levels in the humanized mice and wild-type controls, in contrast to the hyperbilirubinemia phenotype that is observed in MRP2(−/−) mice. The huMRP2 mouse provides a model to study the role of the human transporter in drug disposition and in assessing the in vivo consequences of inhibiting this transporter by compounds interacting with human MRP2.
Y1  - 2012
U6  - http://dx.doi.org/10.1124/dmd.112.047605
SN  - 1521-0111
VL  - 40
IS  - 11
SP  - 2212
EP  - 2218
PB  - ASPET
CY  - Bethesda, Md.
ER  - 
TY  - JOUR
A1  - Scheer, Nico
A1  - Kapelyukh, Yury
A1  - Rode, Anja
A1  - Buechel, Sandra
A1  - Wolf, C. Roland
T1  - Generation and characterization of novel cytochrome P450 Cyp2c gene cluster knockout and CYP2C9 humanized mouse lines
JF  - Molecular Pharmacology
N2  - Compared with rodents and many other animal species, the human cytochrome P450 (P450) Cyp2c gene cluster varies significantly in the multiplicity of functional genes and in the substrate specificity of its enzymes. As a consequence, the use of wild-type animal models to predict the role of human CYP2C enzymes in drug metabolism and drug-drug interactions is limited. Within the human CYP2C cluster CYP2C9 is of particular importance, because it is one of the most abundant P450 enzymes in human liver, and it is involved in the metabolism of a wide variety of important drugs and environmental chemicals. To investigate the in vivo functions of cytochrome P450 Cyp2c genes and to establish a model for studying the functions of CYP2C9 in vivo, we have generated a mouse model with a deletion of the murine Cyp2c gene cluster and a corresponding humanized model expressing CYP2C9 specifically in the liver. Despite the high number of functional genes in the mouse Cyp2c cluster and the reported roles of some of these proteins in different biological processes, mice deleted for Cyp2c genes were viable and fertile but showed certain phenotypic alterations in the liver. The expression of CYP2C9 in the liver also resulted in viable animals active in the metabolism and disposition of a number of CYP2C9 substrates. These mouse lines provide a powerful tool for studying the role of Cyp2c genes and of CYP2C9 in particular in drug disposition and as a factor in drug-drug interaction.
Y1  - 2012
U6  - http://dx.doi.org/10.1124/mol.112.080036
SN  - 1521-0111
VL  - 82
IS  - 6
SP  - 1022
EP  - 1029
PB  - ASPET
CY  - Bethesda, Md.
ER  - 
TY  - JOUR
A1  - Borgmeier, Claudia
A1  - Bongaerts, Johannes
A1  - Meinhardt, Friedhelm
T1  - Genetic analysis of the Bacillus licheniformis degSU operon and the impact of regulatory mutations on protease production
JF  - Journal of biotechnology
N2  - Disruption experiments targeted at the Bacillus licheniformis degSU operon and GFP-reporter analysis provided evidence for promoter activity immediately upstream of degU. pMutin mediated concomitant introduction of the degU32 allele – known to cause hypersecretion in Bacillus subtilis – resulted in a marked increase in protease activity. Application of 5-fluorouracil based counterselection through establishment of a phosphoribosyltransferase deficient Δupp strain eventually facilitated the marker-free introduction of degU32 leading to further protease enhancement achieving levels as for hypersecreting wild strains in which degU was overexpressed. Surprisingly, deletion of rapG – known to interfere with DegU DNA-binding in B. subtilis – did not enhance protease production neither in the wild type nor in the degU32 strain. The combination of degU32 and Δupp counterselection in the type strain is not only equally effective as in hypersecreting wild strains with respect to protease production but furthermore facilitates genetic strain improvement aiming at biological containment and effectiveness of biotechnological processes.
KW  - Marker-free mutagenesis
KW  - Extracellular enzymes
KW  - Uracil-phosphoribosyltransferase
KW  - Hypersecretion
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.jbiotec.2012.02.011
SN  - 1873-4863 (E-Journal); 0168-1656 (Print)
VL  - 159
IS  - 1-2
SP  - 12
EP  - 20
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Feiser, Johannes
ED  - Vismann, Ulrich
T1  - Geotechnik
T2  - Wendehorst Bautechnische Zahlentafeln
N2  - In der nationalen und der europäischen Normung werden die geotechnischen Aufgaben zwecks Mindestanforderungen an Baugrunduntersuchung, rechnerische Nachweise und Überwachung der Ausführung in drei Klassen (Kategorien) eingeteilt. Sie richten sich nach der zu erwartenden Reaktion des Baugrundes, nach dem geotechnischen Schwierigkeitsgrad des Tragwerks und seiner Einflüsse auf dieUmgebung.
Y1  - 2012
SN  - 978-3-8348-0960-5
U6  - http://dx.doi.org/10.1007/978-3-8348-8613-2_17
N1  - Kapitel 17
SP  - 1221
EP  - 1332
PB  - Vieweg + Teubner
CY  - Wiesbaden
ET  - 34
ER  - 
TY  - CHAP
A1  - Feiser, Johannes
T1  - Geotechnik
T2  - Wendehorst Beispiele aus der Baupraxis. - 4. Aufl.
Y1  - 2012
SN  - 978-3-8348-0999-5 ; 978-3-8348-8229-5
U6  - http://dx.doi.org/10.1007/978-3-8348-8229-5_14
SP  - 453
EP  - 495
PB  - Springer Vieweg
CY  - Wiesbaden
ER  - 
TY  - JOUR
A1  - Schneider, Bettina
A1  - Schneider, Wilhelm
T1  - Grundlagen der Unternehmensbesteuerung
JF  - Das Wirtschaftsstudium : wisu ; Zeitschrift für Ausbildung, Examen, Berufseinstieg und Fortbildung
Y1  - 2012
SN  - 0340-3084
VL  - 41
IS  - 10
SP  - 1312
EP  - 1318
PB  - Lange
CY  - Düsseldorf
ER  - 
TY  - JOUR
A1  - Grinsven, Bart van
A1  - Bon, Natalie vanden
A1  - Strauven, Hannelore
A1  - Grieten, Lars
A1  - Murib, Mohammed
A1  - Jiménez Monroy, Kathia L.
A1  - Janssens, Stoffel D.
A1  - Haenen, Ken
A1  - Schöning, Michael Josef
A1  - Vermeeren, Veronique
A1  - Ameloot, Marcel
A1  - Michiels, Luc
A1  - Thoelen, Ronald
A1  - Ceuninck, Ward de
A1  - Wagner, Patrick
T1  - Heat-Transfer Resistance at Solid-Liquid Interfaces: A Tool for The Detection of Single Nucleotide Polymorphisms in DNA.
JF  - ACS Nano
N2  - In this article, we report on the heat-transfer resistance at interfaces as a novel, denaturation-based method to detect single-nucleotide polymorphisms in DNA. We observed that a molecular brush of double-stranded DNA grafted onto synthetic diamond surfaces does not notably affect the heat-transfer resistance at the solid-to-liquid interface. In contrast to this, molecular brushes of single-stranded DNA cause, surprisingly, a substantially higher heat-transfer resistance and behave like a thermally insulating layer. This effect can be utilized to identify ds-DNA melting temperatures via the switching from low- to high heat-transfer resistance. The melting temperatures identified with this method for different DNA duplexes (29 base pairs without and with built-in mutations) correlate nicely with data calculated by modeling. The method is fast, label-free (without the need for fluorescent or radioactive markers), allows for repetitive measurements, and can also be extended toward array formats. Reference measurements by confocal fluorescence microscopy and impedance spectroscopy confirm that the switching of heat-transfer resistance upon denaturation is indeed related to the thermal on-chip denaturation of DNA.
Y1  - 2012
U6  - http://dx.doi.org/10.1021/nn300147e
SN  - 1936-086X
VL  - 6
IS  - 3
SP  - 2712
EP  - 2721
PB  - ACS Publications
CY  - Washington, DC
ER  - 
TY  - CHAP
A1  - Sauerborn, Markus
A1  - Hoffschmidt, Bernhard
A1  - Telle, R.
A1  - Wagner, M.
T1  - Heatable optical analyse system for high temperature absorbers
T2  - 30th ISES Biennial Solar World Congress 2011 : : Kassel, Germany, 28 August - 2 September 2011. Vol. 5
Y1  - 2012
SN  - 978-1-61839-364-7
SP  - 3852
EP  - 3860
PB  - Curran
CY  - Red Hook, NY
ER  - 
TY  - CHAP
A1  - Sieker, T.
A1  - Duwe, A.
A1  - Poth, S.
A1  - Tippkötter, Nils
A1  - Ulber, R.
T1  - Herstellung von Itaconsäure aus Buchenholzhydrolysaten
T2  - Kurzfassungsband / GVC-DECHEMA Vortrags- und Diskussionstagung Biopharmazeutische Produktion : 14. - 16. Mai 2012. Konzerthaus Freibung
Y1  - 2012
SP  - 57
PB  - DECHEMA
CY  - Frankfurt, M.
ER  - 
TY  - CHAP
A1  - Digel, Ilya
A1  - Mansurov, Zulkhair
A1  - Biisenbaev, Makhmut
A1  - Savitskaya, Irina
A1  - Kistaubaeva, Aida
A1  - Akimbekov, Nuraly
A1  - Zhubanova, Azhar
ED  - Hu, Ning
T1  - Heterogeneous Composites on the Basis of Microbial Cells and Nanostructured Carbonized Sorbents
T2  - Composites and Their Applications
N2  - The fact that microorganisms prefer to grow on liquid/solid phase surfaces rather than in the surrounding aqueous phase was noticed long time ago [1]. Virtually any surface – animal, mineral, or vegetable – is a subject for microbial colonization and subsequent biofilm formation. It would be adequate to name just a few notorious examples on microbial colonization of contact lenses, ship hulls, petroleum pipelines, rocks in streams and all kinds of biomedical implants. The propensity of microorganisms to become surface-bound is so profound and ubiquitous that it vindicates the advantages for attached forms over their free-ranging counterparts [2]. Indeed, from ecological and evolutionary standpoints, for many microorganisms the surface-bound state means dwelling in nutritionally favorable, non-hostile environments [3]. Therefore, in most of natural and artificial ecosystems surface-associated microorganisms vastly outnumber organisms in suspension and often organize into complex communities with features that differ dramatically from those of free cells [4].
Y1  - 2012
SN  - 978-953-51-0706-4
U6  - http://dx.doi.org/10.5772/47796
SP  - 249
EP  - 272
PB  - Intech
CY  - London
ER  -