@article{TippkoetterRoth2020,
  author    = {Tippk{\"o}tter, Nils and Roth, Jasmine},
  title     = {Purified Butanol from Lignocellulose - Solvent-Impregnated Resins for an Integrated Selective Removal},
  series = {Chemie Ingenieur Technik},
  volume    = {92},
  journal   = {Chemie Ingenieur Technik},
  number    = {11},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1522-2640},
  doi       = {10.1002/cite.202000200},
  pages     = {1741 -- 1751},
  year      = {2020},
  abstract  = {In traditional microbial biobutanol production, the solvent must be recovered during fermentation process for a sufficient space-time yield. Thermal separation is not feasible due to the boiling point of n-butanol. As an integrated and selective solid-liquid separation alternative, solvent impregnated resins (SIRs) were applied. Two polymeric resins were evaluated and an extractant screening was conducted. Vacuum application with vapor collection in fixed-bed column as bioreactor bypass was successfully implemented as butanol desorption step. In course of further increasing process economics, fermentation with renewable lignocellulosic substrates was conducted using Clostridium acetobutylicum. Utilization of SIR was shown to be a potential strategy for solvent removal from fermentation broth, while application of a bypass column allows for product removal and recovery at once.},
  language  = {en}
}
@article{MuschallikKippReckeretal.2020,
  author    = {Muschallik, Lukas and Kipp, Carina Ronja and Recker, Inga and Bongaerts, Johannes and Pohl, Martina and Gelissen, Melanie and Sch{\"o}ning, Michael Josef and Selmer, Thorsten and Siegert, Petra},
  title     = {Synthesis of α-hydroxy ketones and vicinal diols with the Bacillus licheniformis DSM 13T butane-2, 3-diol dehydrogenase},
  series = {Journal of Biotechnology},
  volume    = {202},
  journal   = {Journal of Biotechnology},
  number    = {Vol. 324},
  publisher = {Elsevier},
  address   = {Amsterdam},
  isbn      = {2590-1559},
  doi       = {10.1016/j.jbiotec.2020.09.016},
  pages     = {61 -- 70},
  year      = {2020},
  abstract  = {The enantioselective synthesis of α-hydroxy ketones and vicinal diols is an intriguing field because of the broad applicability of these molecules. Although, butandiol dehydrogenases are known to play a key role in the production of 2,3-butandiol, their potential as biocatalysts is still not well studied. Here, we investigate the biocatalytic properties of the meso-butanediol dehydrogenase from Bacillus licheniformis DSM 13T (BlBDH). The encoding gene was cloned with an N-terminal StrepII-tag and recombinantly overexpressed in E. coli. BlBDH is highly active towards several non-physiological diketones and α-hydroxyketones with varying aliphatic chain lengths or even containing phenyl moieties. By adjusting the reaction parameters in biotransformations the formation of either the α-hydroxyketone intermediate or the diol can be controlled.},
  language  = {en}
}
@article{ElMoussaouiTalbiAtmaneetal.2020,
  author    = {El Moussaoui, Noureddine and Talbi, Sofian and Atmane, Ilyas and Kassmi, Khalil and Schwarzer, Klemens and Chayeb, Hamid and Bachiri, Najib},
  title     = {Feasibility of a new design of a Parabolic Trough Solar Thermal Cooker (PSTC)},
  series = {Solar Energy},
  volume    = {201},
  journal   = {Solar Energy},
  number    = {Vol. 201 (May 2020)},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0038-092X},
  doi       = {10.1016/j.solener.2020.03.079},
  pages     = {866 -- 871},
  year      = {2020},
  abstract  = {In this article, we describe the structure, the functioning, and the tests of parabolic trough solar thermal cooker (PSTC). This oven is designed to meet the needs of rural residents, including Urban, which requires stable cooking temperatures above 200 °C. The cooking by this cooker is based on the concentration of the sun's rays on a glass vacuum tube and heating of the oil circulate in a big tube, located inside the glass tube. Through two small tubes, associated with large tube, the heated oil, rise and heats the pot of cooking pot containing the food to be cooked (capacity of 5 kg). This cooker is designed in Germany and extensively tested in Morocco for use by the inhabitants who use wood from forests. During a sunny day, having a maximum solar radiation around 720 W/m2 and temperature ambient around 26 °C, maximum temperatures recorded of the small tube, the large tube and the center of the pot are respectively: 370 °C, 270 °C and 260 °C. The cooking process with food at high (fries, ..), we show that the cooking oil temperature rises to 200 °C, after 1 h of heating, the cooking is done at a temperature of 120 °C for 20 min. These temperatures are practically stable following variations and decreases in the intensity of irradiance during the day. The comparison of these results with those of the literature shows an improvement of 30-50 \% on the maximum value of the temperature with a heat storage that could reach 60 min of autonomy. All the results obtained show the good functioning of the PSTC and the feasibility of cooking food at high temperature (>200 °C).},
  language  = {en}
}
@article{SchiedermeierRettnerHeilmannetal.2019,
  author    = {Schiedermeier, Maximilian and Rettner, Cornelius and Heilmann, Marcel and Schneider, Felix and Marz, Martin},
  title     = {Interference of automotive HV-DC-systems by traction voltage-source-inverters (VSI)},
  series = {2019 IEEE Transportation Electrification Conference (ITEC-India)},
  journal   = {2019 IEEE Transportation Electrification Conference (ITEC-India)},
  publisher = {IEEE},
  address   = {New York},
  doi       = {10.1109/ITEC-India48457.2019.ITECINDIA2019-37},
  pages     = {1 -- 6},
  year      = {2019},
  language  = {en}
}
@article{MoretAlkemadeUpcraftetal.2020,
  author    = {Moret, J.L.T.M. and Alkemade, J. and Upcraft, T.M. and Paulßen, Elisabeth and Wolterbeek, H.T. and Ommen, J.R. van and Denkova, A.G.},
  title     = {The application of atomic layer deposition in the production of sorbents for ⁹⁹Mo/⁹⁹ᵐTc generator},
  series = {Applied Radiation and Isotopes},
  volume    = {164},
  journal   = {Applied Radiation and Isotopes},
  number    = {109266},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0969-8043},
  doi       = {10.1016/j.apradiso.2020.109266},
  pages     = {9},
  year      = {2020},
  abstract  = {New production routes for ⁹⁹Mo are steadily gaining importance. However, the obtained specific activity is much lower than currently produced by the fission of U-235. To be able to supply hospitals with ⁹⁹Mo/⁹⁹ᵐTc generators with the desired activity, the adsorption capacity of the column material should be increased. In this paper we have investigated whether the gas phase coating technique Atomic Layer Deposition (ALD), which can deposit ultra-thin layers on high surface area materials, can be used to attain materials with high adsorption capacity for ⁹⁹Mo. For this purpose, ALD was applied on a silica-core sorbent material to coat it with a thin layer of alumina. This sorbent material shows to have a maximum adsorption capacity of 120 mg/g and has a ⁹⁹ᵐTc elution efficiency of 55 ± 2\% based on 3 executive elutions.},
  language  = {en}
}
@article{HentschkeHagerHojdis2014,
  author    = {Hentschke, Reinhard and Hager, Jonathan and Hojdis, Nils},
  title     = {Molecular Modeling Approach to the Prediction of Mechanical Properties of Silica-Reinforced Rubbers},
  series = {Journal of Applied Polymer Science},
  volume    = {131},
  journal   = {Journal of Applied Polymer Science},
  number    = {18},
  publisher = {Wiley},
  address   = {New York, NY},
  issn      = {1097-4628},
  doi       = {10.1002/app.40806},
  pages     = {1 -- 9},
  year      = {2014},
  abstract  = {Recently, we have suggested a nanomechanical model for dissipative loss in filled elastomer networks in the context of the Payne effect. The mechanism is based on a total interfiller particle force exhibiting an intermittent loop, due to the combination of short-range repulsion and dispersion forces with a long-range elastic attraction. The sum of these forces leads, under external strain, to a spontaneous instability of "bonds" between the aggregates in a filler network and attendant energy dissipation. Here, we use molecular dynamics simulations to obtain chemically realistic forces between surface modified silica particles. The latter are combined with the above model to estimate the loss modulus and the low strain storage modulus in elastomers containing the aforementioned filler-compatibilizer systems. The model is compared to experimental dynamic moduli of silica filled rubbers. We find good agreement between the model predictions and the experiments as function of the compatibilizer's molecular structure and its bulk concentration.},
  language  = {en}
}
@article{HarishWriggersJungketal.2016,
  author    = {Harish, Ajay B. and Wriggers, Peter and Jungk, Juliane and Hojdis, Nils and Recker, Carla},
  title     = {Mesoscale Constitutive Modeling of Non-Crystallizing Filled Elastomers},
  series = {Computational Mechanics},
  volume    = {57},
  journal   = {Computational Mechanics},
  publisher = {Springer},
  address   = {Berlin},
  issn      = {1432-0924},
  doi       = {10.1007/s00466-015-1251-1},
  pages     = {653 -- 677},
  year      = {2016},
  abstract  = {Elastomers are exceptional materials owing to their ability to undergo large deformations before failure. However, due to their very low stiffness, they are not always suitable for industrial applications. Addition of filler particles provides reinforcing effects and thus enhances the material properties that render them more versatile for applications like tyres etc. However, deformation behavior of filled polymers is accompanied by several nonlinear effects like Mullins and Payne effect. To this day, the physical and chemical changes resulting in such nonlinear effect remain an active area of research. In this work, we develop a heterogeneous (or multiphase) constitutive model at the mesoscale explicitly considering filler particle aggregates, elastomeric matrix and their mechanical interaction through an approximate interface layer. The developed constitutive model is used to demonstrate cluster breakage, also, as one of the possible sources for Mullins effect observed in non-crystallizing filled elastomers.},
  language  = {en}
}
@article{SchwabHojdisLacayoetal.2016,
  author    = {Schwab, Lukas and Hojdis, Nils and Lacayo, Jorge and Wilhelm, Manfred},
  title     = {Fourier-Transform Rheology of Unvulcanized, Carbon Black Filled Styrene Butadiene Rubber},
  series = {Macromolecular Materials and Engineering},
  volume    = {301},
  journal   = {Macromolecular Materials and Engineering},
  number    = {4},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1439-2054},
  doi       = {10.1002/mame.201500356},
  pages     = {457 -- 468},
  year      = {2016},
  abstract  = {Rubber materials filled with reinforcing fillers display nonlinear rheological behavior at small strain amplitudes below γ0 < 0.1. Nevertheless, rheological data are analyzed mostly in terms of linear parameters, such as shear moduli (G′, G″), which loose their physical meaning in the nonlinear regime. In this work styrene butadiene rubber filled with carbon black (CB) under large amplitude oscillatory shear (LAOS) is analyzed in terms of the nonlinear parameter I3/1. Three different CB grades are used and the filler load is varied between 0 and 70 phr. It is found that I3/1(φ) is most sensitive to changes of the total accessible filler surface area at low strain amplitudes (γ0 = 0.32). The addition of up to 70 phr CB leads to an increase of I3/1(φ) by a factor of more than ten. The influence of the measurement temperature on I3/1 is pronounced for CB levels above the percolation threshold.},
  language  = {en}
}
@article{SvaneborgKarimiVarzanehHojdisetal.2016,
  author    = {Svaneborg, Carsten and Karimi-Varzaneh, Hossein Ali and Hojdis, Nils and Fleck, Franz and Everaers, Ralf},
  title     = {Multiscale approach to equilibrating model polymer melts},
  series = {Physical Review E},
  volume    = {94},
  journal   = {Physical Review E},
  number    = {032502},
  publisher = {AIP Publishing},
  address   = {Melville, NY},
  issn      = {2470-0053},
  doi       = {10.1103/PhysRevE.94.032502},
  year      = {2016},
  abstract  = {We present an effective and simple multiscale method for equilibrating Kremer Grest model polymer melts of varying stiffness. In our approach, we progressively equilibrate the melt structure above the tube scale, inside the tube and finally at the monomeric scale. We make use of models designed to be computationally effective at each scale. Density fluctuations in the melt structure above the tube scale are minimized through a Monte Carlo simulated annealing of a lattice polymer model. Subsequently the melt structure below the tube scale is equilibrated via the Rouse dynamics of a force-capped Kremer-Grest model that allows chains to partially interpenetrate. Finally the Kremer-Grest force field is introduced to freeze the topological state and enforce correct monomer packing. We generate 15 melts of 500 chains of 10.000 beads for varying chain stiffness as well as a number of melts with 1.000 chains of 15.000 monomers. To validate the equilibration process we study the time evolution of bulk, collective, and single-chain observables at the monomeric, mesoscopic, and macroscopic length scales. Extension of the present method to longer, branched, or polydisperse chains, and/or larger system sizes is straightforward.},
  language  = {en}
}
@article{MayerHentschkeHageretal.2017,
  author    = {Mayer, Jan and Hentschke, Reinhard and Hager, Jonathan and Hojdis, Nils and Karimi-Varnaneh, Hossein Ali},
  title     = {A Nano-Mechanical Instability as Primary Contribution to Rolling Resistance},
  series = {Scientific Reports},
  volume    = {7},
  journal   = {Scientific Reports},
  number    = {Article number 11275},
  publisher = {Springer},
  address   = {Berlin},
  issn      = {2045-2322},
  year      = {2017},
  language  = {en}
}
@article{SvaneborgKarimiVarzanehHojdisetal.2018,
  author    = {Svaneborg, Carsten and Karimi-Varzaneh, Hossein Ali and Hojdis, Nils and Fleck, Franz and Everaers, Ralf},
  title     = {Kremer-Grest Models for Universal Properties of Specific Common Polymer Species},
  series = {Soft Condensed Matter},
  journal   = {Soft Condensed Matter},
  number    = {1606.05008},
  year      = {2018},
  abstract  = {The Kremer-Grest (KG) bead-spring model is a near standard in Molecular Dynamic simulations of generic polymer properties. It owes its popularity to its computational efficiency, rather than its ability to represent specific polymer species and conditions. Here we investigate how to adapt the model to match the universal properties of a wide range of chemical polymers species. For this purpose we vary a single parameter originally introduced by Faller and M{\"u}ller-Plathe, the chain stiffness. Examples include polystyrene, polyethylene, polypropylene, cis-polyisoprene, polydimethylsiloxane, polyethyleneoxide and styrene-butadiene rubber. We do this by matching the number of Kuhn segments per chain and the number of Kuhn segments per cubic Kuhn volume for the polymer species and for the Kremer-Grest model. We also derive mapping relations for converting KG model units back to physical units, in particular we obtain the entanglement time for the KG model as function of stiffness allowing for a time mapping. To test these relations, we generate large equilibrated well entangled polymer melts, and measure the entanglement moduli using a static primitive-path analysis of the entangled melt structure as well as by simulations of step-strain deformation of the model melts. The obtained moduli for our model polymer melts are in good agreement with the experimentally expected moduli.},
  language  = {en}
}
@article{WallerBraunHojdisetal.2007,
  author    = {Waller, Mark P. and Braun, Heiko and Hojdis, Nils and B{\"u}hl, Michael},
  title     = {Geometries of Second-Row Transition-Metal Complexes from Density-Functional Theory},
  series = {Journal of Chemical Theory and Computation},
  volume    = {3},
  journal   = {Journal of Chemical Theory and Computation},
  number    = {6},
  issn      = {1549-9626},
  doi       = {10.1021/ct700178y},
  pages     = {2234 -- 2242},
  year      = {2007},
  language  = {en}
}
@article{HagerHentschkeHojdisetal.2015,
  author    = {Hager, Jonathan and Hentschke, Reinhard and Hojdis, Nils and Karimi-Varzaneh, Hossein Ali},
  title     = {Computer Simulation of Particle-Particle Interaction in a Model Polymer Nanocomposite},
  series = {Macromolecules},
  volume    = {48},
  journal   = {Macromolecules},
  number    = {24},
  issn      = {1520-5835},
  doi       = {10.1021/acs.macromol.5b01864},
  pages     = {9039 -- 9049},
  year      = {2015},
  language  = {en}
}
@article{MeyerHentschkeHageretal.2017,
  author    = {Meyer, Jan and Hentschke, Reinhard and Hager, Jonathan and Hojdis, Nils and Karimi-Varzaneh, Hossein Ali},
  title     = {Molecular Simulation of Viscous Dissipation due to Cyclic Deformation of a Silica-Silica Contact in Filled Rubber},
  series = {Macromolecules},
  volume    = {50},
  journal   = {Macromolecules},
  number    = {17},
  issn      = {1520-5835},
  doi       = {10.1021/acs.macromol.7b00947},
  pages     = {6679 -- 6689},
  year      = {2017},
  language  = {en}
}
@article{EveraersKarimiVarzanehFlecketal.2020,
  author    = {Everaers, Ralf and Karimi-Varzaneh, Hossein Ali and Fleck, Franz and Hojdis, Nils and Svaneborg, Carsten},
  title     = {Kremer-Grest Models for Commodity Polymer Melts: Linking Theory, Experiment, and Simulation at the Kuhn Scale},
  series = {Macromolecules},
  volume    = {53},
  journal   = {Macromolecules},
  number    = {6},
  publisher = {ACS Publications},
  address   = {Washington, DC},
  issn      = {1520-5835},
  doi       = {10.1021/acs.macromol.9b02428},
  pages     = {1901 -- 1916},
  year      = {2020},
  abstract  = {The Kremer-Grest (KG) polymer model is a standard model for studying generic polymer properties in molecular dynamics simulations. It owes its popularity to its simplicity and computational efficiency, rather than its ability to represent specific polymers species and conditions. Here we show that by tuning the chain stiffness it is possible to adapt the KG model to model melts of real polymers. In particular, we provide mapping relations from KG to SI units for a wide range of commodity polymers. The connection between the experimental and the KG melts is made at the Kuhn scale, i.e., at the crossover from the chemistry-specific small scale to the universal large scale behavior. We expect Kuhn scale-mapped KG models to faithfully represent universal properties dominated by the large scale conformational statistics and dynamics of flexible polymers. In particular, we observe very good agreement between entanglement moduli of our KG models and the experimental moduli of the target polymers.},
  language  = {en}
}
@misc{StadtmuellerTippkoetterUlber2015,
  author    = {Stadtm{\"u}ller, Ralf and Tippk{\"o}tter, Nils and Ulber, Roland},
  title     = {Method for production of single-stranded macronucleotides},
  year      = {2015},
  abstract  = {The invention relates to a method for production of single-stranded macronucleotides by amplifying and ligating an extended monomeric single-stranded target nucleic acid sequence (targetss) into a repetitive cluster of double-stranded target nucleic acid sequences (targetds), and subsequently cloning the construct into a vector (aptagene vector). The aptagene vector is transformed into host cells for replication of the aptagene and isolated in order to optain single-stranded target sequences (targetss). The invention also relates to single-stranded nucleic acids, produced by a method of the invention.},
  language  = {en}
}
@article{CapitainWagnerHummeletal.2021,
  author    = {Capitain, Charlotte and Wagner, Sebastian and Hummel, Joana and Tippk{\"o}tter, Nils},
  title     = {Investigation of C-N Formation Between Catechols and Chitosan for the Formation of a Strong, Novel Adhesive Mimicking Mussel Adhesion},
  series = {Waste and Biomass Valorization},
  volume    = {12},
  journal   = {Waste and Biomass Valorization},
  publisher = {Springer Nature},
  address   = {Cham},
  issn      = {1877-265X},
  doi       = {10.1007/s12649-020-01110-5},
  pages     = {1761 -- 1779},
  year      = {2021},
  language  = {en}
}
@article{WardoyoNoorElbersetal.2020,
  author    = {Wardoyo, Arinto Y.P. and Noor, Johan A.E. and Elbers, Gereon and Schmitz, Sandra and Flaig, Sascha T. and Budianto, Arif},
  title     = {Characterizing volcanic ash elements from the 2015 eruptions of bromo and raung volcanoes, Indonesia},
  series = {Polish Journal of Environmental Studies},
  volume    = {29},
  journal   = {Polish Journal of Environmental Studies},
  number    = {2},
  publisher = {HARD},
  address   = {Olsztyn},
  issn      = {2083-5906},
  doi       = {10.15244/pjoes/99101},
  pages     = {1899 -- 1907},
  year      = {2020},
  abstract  = {The volcanic eruptions of Mt. Bromo and Mt. Raung in East Java, Indonesia, in 2015 perturbed volcanic materials and affected surface-layer air quality at surrounding locations. During the episodes, the volcanic ash from the eruptions influenced visibility, traffic accidents, flight schedules, and human health. In this research, the volcanic ash particles were collected and characterized by relying on the detail of physical observation. We performed an assessment of the volcanic ash elements to characterize the volcanic ash using two different methods which are aqua regia extracts followed by MP-AES and XRF laboratory test of bulk samples. The analysis results showed that the volcanic ash was mixed of many materials, such as Al, Si, P, K, Ca, Ti, V, Cr, Mn, Fe, Ni, and others. Fe, Si, Ca, and Al were found as the major elements, while the others were the trace elements Ba, Cr, Cu, Mn, P, Mn, Ni, Zn, Sb, Sr, and V with the minor concentrations. XRF analyses showed that Fe dominated the elements of the volcanic ash. The XRF analysis showed that Fe was at 35.40\% in Bromo and 43.00\% in Raung of the detected elements in bulk material. The results of aqua regia extracts analyzed by MP-AES were 1.80\% and 1.70\% of Fe element for Bromo and Raung volcanoes, respectively.},
  language  = {en}
}
@article{MuschallikMolinnusJablonskietal.2020,
  author    = {Muschallik, Lukas and Molinnus, Denise and Jablonski, Melanie and Kipp, Carina Ronja and Bongaerts, Johannes and Pohl, Martina and Wagner, Torsten and Sch{\"o}ning, Michael Josef and Selmer, Thorsten and Siegert, Petra},
  title     = {Synthesis of α-hydroxy ketones and vicinal (R, R)-diols by Bacillus clausii DSM 8716ᵀ butanediol dehydrogenase},
  series = {RSC Advances},
  volume    = {10},
  journal   = {RSC Advances},
  publisher = {Royal Society of Chemistry (RSC)},
  address   = {Cambridge},
  issn      = {2046-2069},
  doi       = {10.1039/D0RA02066D},
  pages     = {12206 -- 12216},
  year      = {2020},
  abstract  = {α-hydroxy ketones (HK) and 1,2-diols are important building blocks for fine chemical synthesis. Here, we describe the R-selective 2,3-butanediol dehydrogenase from B. clausii DSM 8716ᵀ (BcBDH) that belongs to the metal-dependent medium chain dehydrogenases/reductases family (MDR) and catalyzes the selective asymmetric reduction of prochiral 1,2-diketones to the corresponding HK and, in some cases, the reduction of the same to the corresponding 1,2-diols. Aliphatic diketones, like 2,3-pentanedione, 2,3-hexanedione, 5-methyl-2,3-hexanedione, 3,4-hexanedione and 2,3-heptanedione are well transformed. In addition, surprisingly alkyl phenyl dicarbonyls, like 2-hydroxy-1-phenylpropan-1-one and phenylglyoxal are accepted, whereas their derivatives with two phenyl groups are not substrates. Supplementation of Mn²⁺ (1 mM) increases BcBDH's activity in biotransformations. Furthermore, the biocatalytic reduction of 5-methyl-2,3-hexanedione to mainly 5-methyl-3-hydroxy-2-hexanone with only small amounts of 5-methyl-2-hydroxy-3-hexanone within an enzyme membrane reactor is demonstrated.},
  language  = {en}
}
@article{SchmidtTurgutLeetal.2020,
  author    = {Schmidt, Aaron C. and Turgut, Hatice and Le, Dao and Beloqui, Ana and Delaittre, Guillaume},
  title     = {Making the best of it: nitroxide-mediated polymerization of methacrylates via the copolymerization approach with functional styrenics},
  series = {Polymer Chemistry},
  volume    = {11},
  journal   = {Polymer Chemistry},
  number    = {2},
  publisher = {Royal Society of Chemistry (RSC)},
  address   = {Cambridge},
  doi       = {10.1039/C9PY01458F},
  pages     = {593 -- 604},
  year      = {2020},
  abstract  = {The SG1-mediated solution polymerization of methyl methacrylate (MMA) and oligo(ethylene glycol) methacrylate (OEGMA, Mₙ = 300 g mol⁻¹) in the presence of a small amount of functional/reactive styrenic comonomer is investigated. Moieties such as pentafluorophenyl ester, triphenylphosphine, azide, pentafluorophenyl, halide, and pyridine are considered. A comonomer fraction as low as 5 mol\% typically results in a controlled/living behavior, at least up to 50\% conversion. Chain extensions with styrene for both systems were successfully performed. Variation of physical properties such as refractive index (for MMA) and phase transition temperature (for OEGMA) were evaluated by comparing to 100\% pure homopolymers. The introduction of an activated ester styrene derivative in the polymerization of OEGMA allows for the synthesis of reactive and hydrophilic polymer brushes with defined thickness. Finally, using the example of pentafluorostyrene as controlling comonomer, it is demonstrated that functional PMMA-b-PS are able to maintain a phase separation ability, as evidenced by the formation of nanostructured thin films.},
  language  = {en}
}
@article{CapitainRossJonesMoehringetal.2020,
  author    = {Capitain, Charlotte and Ross-Jones, Jesse and M{\"o}hring, Sophie and Tippk{\"o}tter, Nils},
  title     = {Differential scanning calorimetry for quantification of polymer biodegradability in compost},
  series = {International Biodeterioration \& Biodegradation},
  volume    = {149},
  journal   = {International Biodeterioration \& Biodegradation},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0964-8305},
  doi       = {10.1016/j.ibiod.2020.104914},
  pages     = {In Press, Article number 104914},
  year      = {2020},
  abstract  = {The objective of this study is the establishment of a differential scanning calorimetry (DSC) based method for online analysis of the biodegradation of polymers in complex environments. Structural changes during biodegradation, such as an increase in brittleness or crystallinity, can be detected by carefully observing characteristic changes in DSC profiles. Until now, DSC profiles have not been used to draw quantitative conclusions about biodegradation. A new method is presented for quantifying the biodegradation using DSC data, whereby the results were validated using two reference methods. The proposed method is applied to evaluate the biodegradation of three polymeric biomaterials: polyhydroxybutyrate (PHB), cellulose acetate (CA) and Organosolv lignin. The method is suitable for the precise quantification of the biodegradability of PHB. For CA and lignin, conclusions regarding their biodegradation can be drawn with lower resolutions. The proposed method is also able to quantify the biodegradation of blends or composite materials, which differentiates it from commonly used degradation detection methods.},
  language  = {en}
}
@article{EngelGemuendeHoltmannetal.2019,
  author    = {Engel, Mareike and Gem{\"u}nde, Andre and Holtmann, Dirk and M{\"u}ller-Renno, Christine and Ziegler, Christiane and Tippk{\"o}tter, Nils and Ulber, Roland},
  title     = {Clostridium acetobutylicum's connecting world: cell appendage formation in bioelectrochemical systems},
  series = {ChemElectroChem},
  journal   = {ChemElectroChem},
  number    = {Accepted Article},
  publisher = {Wiley},
  address   = {Weinheim},
  issn      = {2196-0216},
  doi       = {10.1002/celc.201901656},
  year      = {2019},
  language  = {en}
}
@article{Delaittre2019,
  author    = {Delaittre, Guillaume},
  title     = {Telechelic Poly(2-Oxazoline)s},
  series = {European Polymer Journal},
  journal   = {European Polymer Journal},
  number    = {In Press, Journal Pre-proof, 109281},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0014-3057},
  doi       = {10.1016/j.eurpolymj.2019.109281},
  year      = {2019},
  language  = {en}
}
@article{EngelBayerHoltmannetal.2019,
  author    = {Engel, Mareike and Bayer, Hendrik and Holtmann, Dirk and Tippk{\"o}tter, Nils and Ulber, Roland},
  title     = {Flavin secretion of Clostridium acetobutylicum in a bioelectrochemical system - Is an iron limitation involved?},
  series = {Bioelectrochemistry},
  journal   = {Bioelectrochemistry},
  number    = {In Press, Accepted Manuscript},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1567-5394},
  doi       = {10.1016/j.bioelechem.2019.05.014},
  year      = {2019},
  language  = {en}
}
@article{SchiffelsSelmer2019,
  author    = {Schiffels, Johannes and Selmer, Thorsten},
  title     = {Combinatorial assembly of ferredoxin-linked modules in Escherichia coli yields a testing platform for Rnf-complexes},
  series = {Biotechnology and Bioengineering},
  journal   = {Biotechnology and Bioengineering},
  number    = {accepted article},
  publisher = {Wiley},
  address   = {Weinheim},
  doi       = {10.1002/bit.27079},
  pages     = {1 -- 36},
  year      = {2019},
  language  = {en}
}
@inproceedings{HoffmannNierenGaebetal.2019,
  author    = {Hoffmann, Katharina and Nieren, Monika and G{\"a}b, Martina and Kasper, Anna and Elbers, Gereon},
  title     = {The potential of near infrared spectroscopy (NIRS) for the environmental biomonitoring of plants},
  series = {International conference on Life Sciences and Technology},
  volume    = {276},
  booktitle = {International conference on Life Sciences and Technology},
  number    = {012009},
  issn      = {1755-1315},
  doi       = {10.1088/1755-1315/276/1/012009},
  pages     = {1 -- 3},
  year      = {2019},
  abstract  = {In the current environmental condition, the increase in pollution of the air, water, and soil indirectly will induce plants stress and decrease vegetation growth rate. These issues pay more attention to be solved by scientists worldwide. The higher level of chemical pollutants also induced the gradual changes in plants metabolism and decreased enzymatic activity. Importantly, environmental biomonitoring may play a pivotal contribution to prevent biodiversity degradation and plants stress due to pollutant exposure. Several previous studies have been done to monitor the effect of environmental changes on plants growth. Among that, Near Infrared spectroscopy (NIRS) offers an alternative way to observe the significant alteration of plant physiology caused by environmental damage related to pollution. Impairment of photosynthesis, nutrient and oxidative imbalances, and mutagenesis.},
  language  = {en}
}
@article{KapelyukhHendersonScheeretal.2019,
  author    = {Kapelyukh, Yury and Henderson, Colin James and Scheer, Nico and Rode, Anja and Wolf, Charles Roland},
  title     = {Defining the contribution of CYP1A1 and CYP1A2 to drug metabolism using humanized CYP1A1/1A2 and Cyp1a1/Cyp1a2 KO mice},
  series = {Drug Metabolism and Disposition},
  journal   = {Drug Metabolism and Disposition},
  number    = {Early view},
  doi       = {10.1124/dmd.119.087718},
  pages     = {43 Seiten},
  year      = {2019},
  language  = {en}
}
@article{LempiaeinenCouttetBolognanietal.2012,
  author    = {Lempi{\"a}inen, Harri and Couttet, Philippe and Bolognani, Federico and M{\"u}ller, Arne and Dubost, Val{\´e}rie and Luisier, Rapha{\"e}lle and Rio-Espinola, Alberto del and Vitry, Veronique and Unterberger, Elif B. and Thomson, John P. and Treindl, Fridolin and Metzger, Ute and Wrzodek, Clemens and Hahne, Florian and Zollinger, Tulipan and Brasa, Sarah and Kalteis, Magdalena and Marcellin, Magali and Giudicelli, Fanny and Braeuning, Albert and Morawiec, Laurent and Zamurovic, Natasa and L{\"a}ngle, Ulrich and Scheer, Nico and Sch{\"u}beler, Dirk and Goodman, Jay and Chibout, Salah-Dine and Marlowe, Jennifer and Theil, Dietlinde and Heard, David J. and Grenet, Olivier and Zell, Andreas and Templin, Markus F. and Meehan, Richard R. and Wolf, Roland C. and Elcombe, Clifford R. and Schwarz, Michael and Moulin, Pierre and Terranova, R{\´e}mi and Moggs, Jonathan G.},
  title     = {Identification of Dlk1-Dio3 imprinted gene cluster non-coding RNAs as novel candidate biomarkers for liver tumor promotion},
  series = {Toxicological Sciences},
  volume    = {131},
  journal   = {Toxicological Sciences},
  number    = {2},
  publisher = {Oxford University Press},
  address   = {Oxford},
  issn      = {1094-2025},
  doi       = {10.1093/toxsci/kfs303},
  pages     = {375 -- 386},
  year      = {2012},
  abstract  = {The molecular events during nongenotoxic carcinogenesis and their temporal order are poorly understood but thought to include long-lasting perturbations of gene expression. Here, we have investigated the temporal sequence of molecular and pathological perturbations at early stages of phenobarbital (PB) mediated liver tumor promotion in vivo. Molecular profiling (mRNA, microRNA [miRNA], DNA methylation, and proteins) of mouse liver during 13 weeks of PB treatment revealed progressive increases in hepatic expression of long noncoding RNAs and miRNAs originating from the Dlk1-Dio3 imprinted gene cluster, a locus that has recently been associated with stem cell pluripotency in mice and various neoplasms in humans. PB induction of the Dlk1-Dio3 cluster noncoding RNA (ncRNA) Meg3 was localized to glutamine synthetase-positive hypertrophic perivenous hepatocytes, sug- gesting a role for β-catenin signaling in the dysregulation of Dlk1-Dio3 ncRNAs. The carcinogenic relevance of Dlk1-Dio3 locus ncRNA induction was further supported by in vivo genetic dependence on constitutive androstane receptor and β-catenin pathways. Our data identify Dlk1-Dio3 ncRNAs as novel candidate early biomarkers for mouse liver tumor promotion and provide new opportunities for assessing the carcinogenic potential of novel compounds.},
  language  = {en}
}
@incollection{HendersonWolfScheer2009,
  author    = {Henderson, Colin J. and Wolf, C. Roland and Scheer, Nico},
  title     = {The use of transgenic animals to study drug metabolism},
  series = {Handbook of Drug Metabolism. 2nd Edition},
  booktitle = {Handbook of Drug Metabolism. 2nd Edition},
  editor    = {Woolf, Thomas F.},
  publisher = {Informa Healthcare},
  address   = {New York},
  isbn      = {978-1-4200-7647-9},
  pages     = {637 -- 658},
  year      = {2009},
  language  = {en}
}
@incollection{WolfKapelyukhScheeretal.2015,
  author    = {Wolf, C. Roland and Kapelyukh, Yury and Scheer, Nico and Henderson, Colin J.},
  title     = {Application of Humanised and Other Transgenic Models to Predict Human Responses to Drugs},
  editor    = {Wilson, Alan G. E.},
  publisher = {RSC Publ.},
  address   = {Cambridge},
  isbn      = {978-1-78262-778-4},
  doi       = {10.1039/9781782622376-00152},
  pages     = {152 -- 176},
  year      = {2015},
  abstract  = {The use of transgenic animal models has transformed our knowledge of complex biochemical pathways in vivo. It has allowed disease processes to be modelled and used in the development of new disease prevention and treatment strategies. They can also be used to define cell- and tissue-specific pathways of gene regulation. A further major application is in the area of preclinical development where such models can be used to define pathways of chemical toxicity, and the pathways that regulate drug disposition. One major application of this approach is the humanisation of mice for the proteins that control drug metabolism and disposition. Such models can have numerous applications in the development of drugs and in their more sophisticated use in the clinic.},
  language  = {en}
}
@incollection{ScheerChuSalphatietal.2016,
  author    = {Scheer, Nico and Chu, Xiaoyan and Salphati, Laurent and Zamek-Gliszczynski, Maciej J.},
  title     = {Knockout and humanized animal models to study membrane transporters in drug development},
  series = {Drug Transporters: Volume 1: Role and Importance in ADME and Drug Development},
  booktitle = {Drug Transporters: Volume 1: Role and Importance in ADME and Drug Development},
  editor    = {Nicholls, Glynis},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  isbn      = {978-1-78262-379-3},
  doi       = {10.1039/9781782623793-00298},
  pages     = {298 -- 332},
  year      = {2016},
  language  = {en}
}
@incollection{SamuelssonScheerWilsonetal.2017,
  author    = {Samuelsson, K. and Scheer, Nico and Wilson, I. and Wolf, C.R. and Henderson, C.J.},
  title     = {Genetically Humanized Animal Models},
  series = {Comprehensive Medicinal Chemistry III. 3rd Edition},
  booktitle = {Comprehensive Medicinal Chemistry III. 3rd Edition},
  editor    = {Chackalamannil, Samuel},
  publisher = {Elsevier},
  address   = {Saint Louis},
  isbn      = {978-0-12-803201-5},
  doi       = {10.1016/B978-0-12-409547-2.12376-5},
  pages     = {130 -- 149},
  year      = {2017},
  abstract  = {Genetically humanized mice for proteins involved in drug metabolism and toxicity and mice engrafted with human hepatocytes are emerging as promising in vivo models for improved prediction of the pharmacokinetic, drug-drug interaction, and safety characteristics of compounds in humans. This is an overview on the genetically humanized and chimeric liver-humanized mouse models, which are illustrated with examples of their utility in drug metabolism and toxicity studies. The models are compared to give guidance for selection of the most appropriate model by highlighting advantages and disadvantages to be carefully considered when used for studies in drug discovery and development.},
  language  = {en}
}
@article{StanleyHorsburghRossetal.2006,
  author    = {Stanley, Lesley A. and Horsburgh, Brian C. and Ross, Jillian and Scheer, Nico and Wolf, C. Roland},
  title     = {Nuclear Receptors which play a pivotal role in drug disposition and chemical toxicity},
  series = {Drug Metabolism Reviews},
  volume    = {38},
  journal   = {Drug Metabolism Reviews},
  number    = {3},
  issn      = {1097-9883},
  doi       = {10.1080/03602530600786232},
  pages     = {515 -- 597},
  year      = {2006},
  language  = {en}
}
@article{StanleyHorsburghRossetal.2009,
  author    = {Stanley, Lesley A. and Horsburgh, Brian C. and Ross, Jillian and Scheer, Nico and Wolf, C. Roland},
  title     = {Drug transporters: Gatekeepers controlling access of xenobiotics to the cellular interior},
  series = {Drug Metabolism Reviews},
  volume    = {41},
  journal   = {Drug Metabolism Reviews},
  number    = {1},
  publisher = {Taylor \& Francis},
  address   = {London},
  issn      = {1097-9883},
  doi       = {10.1080/03602530802605040},
  pages     = {27 -- 65},
  year      = {2009},
  language  = {en}
}
@article{HendersonScheerWolf2009,
  author    = {Henderson, Colin J. and Scheer, Nico and Wolf, C. Roland},
  title     = {Advances in the generation of mouse models to elucidate the pathways of drug metabolism in rodents and man},
  series = {Expert Review of Clinical Pharmacology},
  volume    = {2},
  journal   = {Expert Review of Clinical Pharmacology},
  number    = {2},
  publisher = {Taylor \& Francis},
  address   = {London},
  issn      = {1751-2441},
  doi       = {10.1586/17512433.2.2.105},
  pages     = {105 -- 109},
  year      = {2009},
  language  = {en}
}
@article{ScheerWolf2013,
  author    = {Scheer, Nico and Wolf, C. Roland},
  title     = {Xenobiotic receptor humanized mice and their utility},
  series = {Drug Metabolism Reviews},
  journal   = {Drug Metabolism Reviews},
  number    = {1},
  publisher = {Taylor \& Francis},
  address   = {London},
  issn      = {1097-9883},
  doi       = {10.3109/03602532.2012.738687},
  pages     = {110 -- 121},
  year      = {2013},
  language  = {en}
}
@article{ScheerWolf2014,
  author    = {Scheer, Nico and Wolf, C. Roland},
  title     = {Genetically humanized mouse models of drug metabolizing enzymes and transporters and their applications},
  series = {Xenobiotica},
  volume    = {44},
  journal   = {Xenobiotica},
  number    = {2},
  publisher = {Taylor \& Francis},
  address   = {Abingdon},
  issn      = {1366-5928},
  doi       = {10.3109/00498254.2013.815831},
  pages     = {96 -- 108},
  year      = {2014},
  abstract  = {1. Drug metabolizing enzymes and transporters play important roles in the absorption, metabolism, tissue distribution and excretion of various compounds and their metabolites and thus can significantly affect their efficacy and safety. Furthermore, they can be involved in drug-drug interactions which can result in adverse responses, life-threatening toxicity or impaired efficacy. Significant species differences in the interaction of compounds with drug metabolizing enzymes and transporters have been described. 2. In order to overcome the limitation of animal models in accurately predicting human responses, a large variety of mouse models humanized for drug metabolizing enzymes and to a lesser extent drug transporters have been created. 3. This review summarizes the literature describing these mouse models and their key applications in studying the role of drug metabolizing enzymes and transporters in drug bioavailability, tissue distribution, clearance and drug-drug interactions as well as in human metabolite testing and risk assessment. 4. Though such humanized mouse models have certain limitations, there is great potential for their use in basic research and for testing and development of new medicines. These limitations and future potentials will be discussed.},
  language  = {en}
}
@article{ScheerWilson2016,
  author    = {Scheer, Nico and Wilson, Ian D.},
  title     = {A comparison between genetically humanized and chimeric liver humanized mouse models for studies in drug metabolism and toxicity},
  series = {Drug Discovery Today},
  volume    = {21},
  journal   = {Drug Discovery Today},
  number    = {2},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1359-6446},
  doi       = {10.1016/j.drudis.2015.09.002},
  pages     = {250 -- 263},
  year      = {2016},
  abstract  = {Mice that have been genetically humanized for proteins involved in drug metabolism and toxicity and mice engrafted with human hepatocytes are emerging and promising in vivo models for an improved prediction of the pharmacokinetic, drug-drug interaction and safety characteristics of compounds in humans. The specific advantages and disadvantages of these models should be carefully considered when using them for studies in drug discovery and development. Here, an overview on the corresponding genetically humanized and chimeric liver humanized mouse models described to date is provided and illustrated with examples of their utility in drug metabolism and toxicity studies. We compare the strength and weaknesses of the two different approaches, give guidance for the selection of the appropriate model for various applications and discuss future trends and perspectives.},
  language  = {en}
}
@article{ScheerCamposOrtega1999,
  author    = {Scheer, Nico and Campos-Ortega, Jos{\´e} A.},
  title     = {Use of the Gal4-UAS technique for targeted gene expression in the zebrafish},
  series = {Mechanism of Development},
  volume    = {80},
  journal   = {Mechanism of Development},
  number    = {2},
  issn      = {0925-4773},
  doi       = {10.1016/S0925-4773(98)00209-3},
  pages     = {153 -- 158},
  year      = {1999},
  language  = {en}
}
@article{HalbachScheer2000,
  author    = {Halbach, Thorsten and Scheer, Nico},
  title     = {Transcriptional activation by the PHD finger is inhibited through an adjacent leucine zipper that binds 14-3-3 proteins},
  series = {Nucleic Acids Research},
  volume    = {28},
  journal   = {Nucleic Acids Research},
  number    = {18},
  issn      = {1362-4962},
  doi       = {10.1093/nar/28.18.3542},
  pages     = {3542 -- 3550},
  year      = {2000},
  language  = {en}
}
@article{ScheerGrothHansetal.2001,
  author    = {Scheer, Nico and Groth, Anne and Hans, Stefan and Campos-Ortega, Jos{\´e} A.},
  title     = {An instructive function for Notch in promoting gliogenesis in the zebrafish retina},
  series = {Development},
  volume    = {128},
  journal   = {Development},
  number    = {7},
  issn      = {0950-1991},
  pages     = {1099 -- 1107},
  year      = {2001},
  language  = {en}
}
@article{LawsonScheerPhametal.2001,
  author    = {Lawson, Nathan D. and Scheer, Nico and Pham, Van N. and Kim, Ceol-Hee and Chitnis, Ajay B. and Campos-Ortega, Jos{\´e} A. and Weinstein, Brant M.},
  title     = {Notch signaling is required for arterial-venous differentiation during embryonic vascular development},
  series = {Development},
  volume    = {128},
  journal   = {Development},
  number    = {19},
  issn      = {1477-9129},
  pages     = {3675 -- 3683},
  year      = {2001},
  language  = {en}
}
@article{ScheerRiedlWarrenetal.2002,
  author    = {Scheer, Nico and Riedl, Iris and Warren, J.T. and Kuwada, John Y. and Campos-Ortega, Jos{\´e} A.},
  title     = {A quantitative analysis of the kinetics of Gal4 activator and effector gene expression in the zebrafish},
  series = {Mechanism of Development},
  volume    = {112},
  journal   = {Mechanism of Development},
  number    = {1-2},
  issn      = {0925-4773},
  doi       = {10.1016/S0925-4773(01)00621-9},
  pages     = {9 -- 14},
  year      = {2002},
  language  = {en}
}
@article{HansScheerRiedletal.2004,
  author    = {Hans, Stefan and Scheer, Nico and Riedl, Iris and Weiz{\"a}cker, Elisabeth von and Blader, Patrick and Campos-Ortega, Jos{\´e} A.},
  title     = {her3, a zebrafish member of the hairy-E(spl) family, is repressed by Notch signalling},
  series = {Development},
  volume    = {131},
  journal   = {Development},
  number    = {12},
  issn      = {1477-9129},
  doi       = {10.1242/dev.01167},
  pages     = {2957 -- 2969},
  year      = {2004},
  language  = {en}
}
@article{ReugelsBoggettiScheeretal.2006,
  author    = {Reugels, Alexander M. and Boggetti, Barbara and Scheer, Nico and Campos-Ortega, Jos{\´e} A.},
  title     = {Asymmetric localization of Numb:EGFP in dividing neuroepithelial cells during neurulation in Danio rerio},
  series = {Developmental Dynamics},
  volume    = {235},
  journal   = {Developmental Dynamics},
  number    = {4},
  issn      = {1097-0177},
  doi       = {10.1002/dvdy.20699},
  pages     = {934 -- 948},
  year      = {2006},
  language  = {en}
}
@article{ScheerKapelyukhMcEwanetal.2012,
  author    = {Scheer, Nico and Kapelyukh, Yury and McEwan, Jillian and Beuger, Vincent and Stanley, Lesley A. and Rode, Anja and Wolf, C. Roland},
  title     = {Modeling Human Cytochrome P450 2D6 Metabolism and Drug-drug Interaction by a Novel Panel of Knockout and Humanized Mouse Lines},
  series = {Molecular Pharmacology},
  volume    = {81},
  journal   = {Molecular Pharmacology},
  number    = {1},
  publisher = {ASPET},
  address   = {Bethesda, Md.},
  issn      = {1521-0111},
  doi       = {10.1124/mol.111.075192},
  pages     = {63 -- 72},
  year      = {2012},
  abstract  = {The highly polymorphic human cytochrome P450 2D6 enzyme is involved in the metabolism of up to 25\% of all marketed drugs and accounts for significant individual differences in response to CYP2D6 substrates. Because of the differences in the multiplicity and substrate specificity of CYP2D family members among species, it is difficult to predict pathways of human CYP2D6-dependent drug metabolism on the basis of animal studies. To create animal models that reflect the human situation more closely and that allow an in vivo assessment of the consequences of differential CYP2D6 drug metabolism, we have developed a novel straightforward approach to delete the entire murine Cyp2d gene cluster and replace it with allelic variants of human CYP2D6. By using this approach, we have generated mouse lines expressing the two frequent human protein isoforms CYP2D6.1 and CYP2D6.2 and an as yet undescribed variant of this enzyme, as well as a Cyp2d cluster knockout mouse. We demonstrate that the various transgenic mouse lines cover a wide spectrum of different human CYP2D6 metabolizer phenotypes. The novel humanization strategy described here provides a robust approach for the expression of different CYP2D6 allelic variants in transgenic mice and thus can help to evaluate potential CYP2D6-dependent interindividual differences in drug response in the context of personalized medicine.},
  language  = {en}
}
@article{ScheerRossRodeetal.2008,
  author    = {Scheer, Nico and Ross, Jillian and Rode, Anja and Zevnik, Branko and Niehaves, Sandra and Faust, Nicole and Wolf, C. Roland},
  title     = {A novel panel of mouse models to evaluate the role of human pregnane X receptor and constitutive androstane receptor in drug response},
  series = {Journal of Clinical Investigation},
  volume    = {118},
  journal   = {Journal of Clinical Investigation},
  number    = {9},
  issn      = {1558-8238},
  doi       = {https://doi.org/10.1172/JCI35483},
  pages     = {3228 -- 3239},
  year      = {2008},
  language  = {en}
}
@article{ScheerRossKapelyukhetal.2010,
  author    = {Scheer, Nico and Ross, Jillian and Kapelyukh, Yury and Rode, Anja and Wolf, C. Roland},
  title     = {In vivo responses of the human and murine pregnane X receptor to dexamethasone in mice},
  series = {Drug Metabolism and Disposition},
  volume    = {38},
  journal   = {Drug Metabolism and Disposition},
  number    = {7},
  publisher = {ASPET},
  address   = {Bethesda},
  issn      = {1521-009X},
  doi       = {10.1124/dmd.109.031872},
  pages     = {1046 -- 1053},
  year      = {2010},
  abstract  = {Dexamethasone (DEX) is a potent and widely used anti-inflammatory and immunosuppressant glucocorticoid. It can bind and activate the pregnane X receptor (PXR), which plays a critical role as xenobiotic sensor in mammals to induce the expression of many enzymes, including cytochromes P450 in the CYP3A family. This induction results in its own metabolism. We have used a series of transgenic mouse lines, including a novel, improved humanized PXR line, to compare the induction profile of PXR-regulated drug-metabolizing enzymes after DEX administration, as well as looking at hepatic responses to rifampicin (RIF). The new humanized PXR model has uncovered further intriguing differences between the human and mouse receptors in that RIF only induced Cyp2b10 in the new humanized model. DEX was found to be a much more potent inducer of Cyp3a proteins in wild-type mice than in mice humanized for PXR. To assess whether PXR is involved in the detoxification of DEX in the liver, we analyzed the consequences of high doses of the glucocorticoid on hepatotoxicity on different PXR genetic backgrounds. We also studied these effects in an additional mouse model in which functional mouse Cyp3a genes have been deleted. These strains exhibited different sensitivities to DEX, indicating a protective role of the PXR and CYP3A proteins against the hepatotoxicity of this compound.},
  language  = {en}
}
@article{RossPlummerRodeetal.2010,
  author    = {Ross, Jillian and Plummer, Simon M. and Rode, Anja and Scheer, Nico and Bower, Conrad C. and Vogel, Ortwin and Henderson, Colin J. and Wolf, C. Roland and Elcombe, Clifford R.},
  title     = {Human constitutive androstane receptor (CAR) and pregnane X receptor (PXR) support the hypertrophic but not the hyperplastic response to the murine nongenotoxic hepatocarcinogens phenobarbital and chlordane in vivo},
  series = {Toxicological Sciences},
  volume    = {116},
  journal   = {Toxicological Sciences},
  number    = {2},
  publisher = {Oxford University Press},
  address   = {Oxford},
  issn      = {1096-0929},
  doi       = {10.1093/toxsci/kfq118},
  pages     = {452 -- 466},
  year      = {2010},
  abstract  = {Mouse nongenotoxic hepatocarcinogens phenobarbital (PB) and chlordane induce hepatomegaly characterized by hypertrophy and hyperplasia. Increased cell proliferation is implicated in the mechanism of tumor induction. The relevance of these tumors to human health is unclear. The xenoreceptors, constitutive androstane receptors (CARs), and pregnane X receptor (PXR) play key roles in these processes. Novel "humanized" and knockout models for both receptors were developed to investigate potential species differences in hepatomegaly. The effects of PB (80 mg/kg/4 days) and chlordane (10 mg/kg/4 days) were investigated in double humanized PXR and CAR (huPXR/huCAR), double knockout PXR and CAR (PXRKO/CARKO), and wild-type (WT) C57BL/6J mice. In WT mice, both compounds caused increased liver weight, hepatocellular hypertrophy, and cell proliferation. Both compounds caused alterations to a number of cell cycle genes consistent with induction of cell proliferation in WT mice. However, these gene expression changes did not occur in PXRKO/CARKO or huPXR/huCAR mice. Liver hypertrophy without hyperplasia was demonstrated in the huPXR/huCAR animals in response to both compounds. Induction of the CAR and PXR target genes, Cyp2b10 and Cyp3a11, was observed in both WT and huPXR/huCAR mouse lines following treatment with PB or chlordane. In the PXRKO/CARKO mice, neither liver growth nor induction of Cyp2b10 and Cyp3a11 was seen following PB or chlordane treatment, indicating that these effects are CAR/PXR dependent. These data suggest that the human receptors are able to support the chemically induced hypertrophic responses but not the hyperplastic (cell proliferation) responses. At this time, we cannot be certain that hCAR and hPXR when expressed in the mouse can function exactly as the genes do when they are expressed in human cells. However, all parameters investigated to date suggest that much of their functionality is maintained.},
  language  = {en}
}
@article{ScheerKapelyukhRodeetal.2012,
  author    = {Scheer, Nico and Kapelyukh, Yury and Rode, Anja and Buechel, Sandra and Wolf, C. Roland},
  title     = {Generation and characterization of novel cytochrome P450 Cyp2c gene cluster knockout and CYP2C9 humanized mouse lines},
  series = {Molecular Pharmacology},
  volume    = {82},
  journal   = {Molecular Pharmacology},
  number    = {6},
  publisher = {ASPET},
  address   = {Bethesda, Md.},
  issn      = {1521-0111},
  doi       = {10.1124/mol.112.080036},
  pages     = {1022 -- 1029},
  year      = {2012},
  abstract  = {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.},
  language  = {en}
}