TY  - JOUR
A1  - Salpati, Laurent
A1  - Chu, Xiaoyan
A1  - Chen, Liangfu
A1  - Prasad, Bhagwat
A1  - Dallas, Shannon
A1  - Evers, Raymond
A1  - Mamaril-Fishman, Donna
A1  - Geier, Ethan G.
A1  - Kehler, Jonathan
A1  - Kunta, Jeevan
A1  - Mezler, Mario
A1  - Laplanche, Loic
A1  - Pang, Jodie
A1  - Soars, Matthew G.
A1  - Unadkat, Jashvant D.
A1  - van Waterschoot, Robert A.B.
A1  - Yabut, Jocelyn
A1  - Schinkel, Alfred H.
A1  - Scheer, Nico
A1  - Rode, Anja
T1  - Evaluation of organic anion transporting polypeptide 1B1 and 1B3 humanized mice as a translational model to study the pharmacokinetics of statins
JF  - Drug Metabolism and Disposition
N2  - Organic anion transporting polypeptide (Oatp) 1a/1b knockout and OATP1B1 and -1B3 humanized mouse models are promising tools for studying the roles of these transporters in drug disposition. Detailed characterization of these models will help to better understand their utility for predicting clinical outcomes. To advance this approach, we carried out a comprehensive analysis of these mouse lines by evaluating the compensatory changes in mRNA expression, quantifying the amounts of OATP1B1 and -1B3 protein by liquid chromatography–tandem mass spectrometry, and studying the active uptake in isolated hepatocytes and the pharmacokinetics of some prototypical substrates including statins. Major outcomes from these studies were 1) mostly moderate compensatory changes in only a few genes involved in drug metabolism and disposition, 2) a robust hepatic expression of OATP1B1 and -1B3 proteins in the respective humanized mouse models, and 3) functional activities of the human transporters in hepatocytes isolated from the humanized models with several substrates tested in vitro and with pravastatin in vivo. However, the expression of OATP1B1 and -1B3 in the humanized models did not significantly alter liver or plasma concentrations of rosuvastatin and pitavastatin compared with Oatp1a/1b knockout controls under the conditions used in our studies. Hence, although the humanized OATP1B1 and -1B3 mice showed in vitro and/or in vivo functional activity with some statins, further characterization of these models is required to define their potential use and limitations in the prediction of drug disposition and drug-drug interactions in humans.
Y1  - 2014
U6  - https://doi.org/10.1124/dmd.114.057976
SN  - 1521-009X
VL  - 42
IS  - 8
SP  - 1301
EP  - 1313
PB  - ASPET
CY  - Bethesda, Md.
ER  - 
TY  - JOUR
A1  - Welden, Melanie
A1  - Poghossian, Arshak
A1  - Vahidpour, Farnoosh
A1  - Wendlandt, Tim
A1  - Keusgen, Michael
A1  - Wege, Christina
A1  - Schöning, Michael Josef
T1  - Towards multi-analyte detection with field-effect capacitors modified with tobacco mosaic virus bioparticles as enzyme nanocarriers
JF  - Biosensors
N2  - Utilizing an appropriate enzyme immobilization strategy is crucial for designing enzyme-based biosensors. Plant virus-like particles represent ideal nanoscaffolds for an extremely dense and precise immobilization of enzymes, due to their regular shape, high surface-to-volume ratio and high density of surface binding sites. In the present work, tobacco mosaic virus (TMV) particles were applied for the co-immobilization of penicillinase and urease onto the gate surface of a field-effect electrolyte-insulator-semiconductor capacitor (EISCAP) with a p-Si-SiO₂-Ta₂O₅ layer structure for the sequential detection of penicillin and urea. The TMV-assisted bi-enzyme EISCAP biosensor exhibited a high urea and penicillin sensitivity of 54 and 85 mV/dec, respectively, in the concentration range of 0.1–3 mM. For comparison, the characteristics of single-enzyme EISCAP biosensors modified with TMV particles immobilized with either penicillinase or urease were also investigated. The surface morphology of the TMV-modified Ta₂O₅-gate was analyzed by scanning electron microscopy. Additionally, the bi-enzyme EISCAP was applied to mimic an XOR (Exclusive OR) enzyme logic gate.
KW  - urease
KW  - enzyme-logic gate
KW  - bi-enzyme biosensor
KW  - capacitive field-effect sensor
KW  - tobacco mosaic virus (TMV)
KW  - penicillinase
Y1  - 2022
U6  - https://doi.org/10.3390/bios12010043
SN  - 2079-6374
N1  - This article belongs to the Special Issue "Biosensors: 10th Anniversary Feature Papers"
VL  - 12
IS  - 1
PB  - MDPI
CY  - Basel
ER  - 
TY  - GEN
A1  - Tippkötter, Nils
A1  - Roth, J.
A1  - Möhring, M.
A1  - Wulfhorst, H.
A1  - Ulber, Roland
T1  - Verwertung von Bioraffinerie-Stoffströmen am Beispiel von Einzellerproteinen
T2  - Chemie Ingenieur Technik
N2  - Die Nutzung von Biomasse aus pflanzlichen Abfällen für die stoffliche Verwertung rückt immer stärker in den Vordergrund. Dabei ist vor allem die ganzheitliche Verwertung der Stoffströme von Bedeutung, da diese einen integrativen Ansatz ermöglichen. Im Rahmen dieser Arbeit wird die Produktion von Einzellerproteinen (Single-Cell Proteins, SCPs) mithilfe von unterschiedlichen Rohsubstraten dargelegt. Somit können Reststoffströme, die in keiner Konkurrenz zur Produktion von Lebensmitteln stehen, für die Herstellung von Futter- und auch Nahrungsmitteln Verwendung finden. Die zunächst thermisch vorbehandelten Ausgangsmaterialien stammen aus forstwirtschaftlichen und grünen Abfällen und ermöglichen durch eine anschließende enzymatische Hydrolyse die Freisetzung von Monosacchariden. Aus diesen erfolgt die SCP-Produktion fermentativ mithilfe der drei Modellorganismen Bakterium, Hefe und Pilz. Hierfür wird sowohl das flüssige Hydrolysat als auch der feste Reststoff auf der Basis einer Feststofffermentation genutzt. Auf diese Weise ist eine vollständige Verwertung der Ausgangsmaterialien möglich. Mit den gewonnen Daten erfolgt abschließend eine Bewertung der SCPs aus nachwachsenden Rohstoffen als alternative Proteinquelle.
Y1  - 2014
U6  - https://doi.org/10.1002/cite.201450257
SN  - 0009-286X
SN  - 1522-2640 (eISSN)
N1  - ProcessNet-Jahrestagung 2014 und 31. DECHEMA-Jahrestagung der Biotechnologen, 30. September - 2. Oktober 2014, Eurogress Aachen
VL  - 86
IS  - 9
SP  - 1399
EP  - 1400
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Lempiäinen, Harri
A1  - Couttet, Philippe
A1  - Bolognani, Federico
A1  - Müller, Arne
A1  - Dubost, Valérie
A1  - Luisier, Raphaëlle
A1  - Rio-Espinola, Alberto del
A1  - Vitry, Veronique
A1  - Unterberger, Elif B.
A1  - Thomson, John P.
A1  - Treindl, Fridolin
A1  - Metzger, Ute
A1  - Wrzodek, Clemens
A1  - Hahne, Florian
A1  - Zollinger, Tulipan
A1  - Brasa, Sarah
A1  - Kalteis, Magdalena
A1  - Marcellin, Magali
A1  - Giudicelli, Fanny
A1  - Braeuning, Albert
A1  - Morawiec, Laurent
A1  - Zamurovic, Natasa
A1  - Längle, Ulrich
A1  - Scheer, Nico
A1  - Schübeler, Dirk
A1  - Goodman, Jay
A1  - Chibout, Salah-Dine
A1  - Marlowe, Jennifer
A1  - Theil, Dietlinde
A1  - Heard, David J.
A1  - Grenet, Olivier
A1  - Zell, Andreas
A1  - Templin, Markus F.
A1  - Meehan, Richard R.
A1  - Wolf, Roland C.
A1  - Elcombe, Clifford R.
A1  - Schwarz, Michael
A1  - Moulin, Pierre
A1  - Terranova, Rémi
A1  - Moggs, Jonathan G.
T1  - Identification of Dlk1-Dio3 imprinted gene cluster non-coding RNAs as novel candidate biomarkers for liver tumor promotion
JF  - Toxicological Sciences
N2  - 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.
Y1  - 2012
U6  - https://doi.org/10.1093/toxsci/kfs303
SN  - 1094-2025
VL  - 131
IS  - 2
SP  - 375
EP  - 386
PB  - Oxford University Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Henderson, Colin J.
A1  - Mclaughlin, Lesley A.
A1  - Scheer, Nico
A1  - Stanley, Lesley A.
A1  - Wolf, C. Roland
T1  - Cytochrome b5 Is a Major Determinant of Human Cytochrome P450 CYP2D6 and CYP3A4 Activity In Vivo s
JF  - Molecular Pharmacology
Y1  - 2015
U6  - https://doi.org/10.1124/mol.114.097394
SN  - 1521-0111
VL  - 87
IS  - 4
SP  - 733
EP  - 739
PB  - ASPET
CY  - Bethesda
ER  - 
TY  - JOUR
A1  - Kapelyukh, Yury
A1  - Henderson, Colin James
A1  - Scheer, Nico
A1  - Rode, Anja
A1  - Wolf, Charles Roland
T1  - Defining the contribution of CYP1A1 and CYP1A2 to drug metabolism using humanized CYP1A1/1A2 and Cyp1a1/Cyp1a2 KO mice
JF  - Drug Metabolism and Disposition
Y1  - 2019
U6  - https://doi.org/10.1124/dmd.119.087718
IS  - Early view
ER  - 
TY  - JOUR
A1  - Falkenberg, Fabian
A1  - Bott, Michael
A1  - Bongaerts, Johannes
A1  - Siegert, Petra
T1  - Phylogenetic survey of the subtilase family and a data-mining-based search for new subtilisins from Bacillaceae
JF  - Frontiers in Microbiology
N2  - The subtilase family (S8), a member of the clan SB of serine proteases are ubiquitous in all kingdoms of life and fulfil different physiological functions. Subtilases are divided in several groups and especially subtilisins are of interest as they are used in various industrial sectors. Therefore, we searched for new subtilisin sequences of the family Bacillaceae using a data mining approach. The obtained 1,400 sequences were phylogenetically classified in the context of the subtilase family. This required an updated comprehensive overview of the different groups within this family. To fill this gap, we conducted a phylogenetic survey of the S8 family with characterised holotypes derived from the MEROPS database. The analysis revealed the presence of eight previously uncharacterised groups and 13 subgroups within the S8 family. The sequences that emerged from the data mining with the set filter parameters were mainly assigned to the subtilisin subgroups of true subtilisins, high-alkaline subtilisins, and phylogenetically intermediate subtilisins and represent an excellent source for new subtilisin candidates.
Y1  - 2022
U6  - https://doi.org/10.3389/fmicb.2022.1017978
SN  - 1664-302X
VL  - 2022
IS  - 13
PB  - Frontiers
CY  - Lausanne
ER  - 
TY  - JOUR
A1  - Danho, Waleed
A1  - Naithani, Vinod K.
A1  - Sasaki, André N.
A1  - Föhles, Joseph
A1  - Berndt, Heinz
A1  - [u.a.], 
T1  - Human proinsulin, VII : synthesis of two protected peptides corresponding to the sequences 1—45 and 46—86 of the prohormone
JF  - Hoppe-Seyler's Zeitschrift für physiologische Chemie
Y1  - 1980
U6  - https://doi.org/10.1515/bchm2.1980.361.1.857
SN  - 1437-4315
SN  - 0018-4888
VL  - 361
IS  - 1
SP  - 857
EP  - 863
ER  - 
TY  - CHAP
A1  - Berndt, Heinz
A1  - Turck, Christoph W.
ED  - Voelter, Wolfgang
T1  - Syntheses of defined peptide derivatives by aminolysis of 3-[Nα-benzyloxycarbonyl peptidyloxy] -2-hydroxy-N-methyl-benzamides at elevated temperatures II. Synthesis of the peptide derivatives Z-Ala-X-Gly-N(Et)2, X=Phe, Leu, Val, Ser (But), Glu (OBut)
T2  - Chemistry of peptides and proteins : proceedings of the Fourth USSR-FRG Symposium, Tübingen, Federal Republic of Germany, June 8 - 12, 1982 / ed. Wolfgang Voelter ... - Vol. 2
Y1  - 1984
SN  - 3-11009-580-7
SP  - 97
EP  - 103
PB  - de Gruyter
CY  - Berlin [u.a.]
ER  - 
TY  - GEN
A1  - Möhring, S.
A1  - Wulfhorst, H.
A1  - Capitain, C.
A1  - Roth, J.
A1  - Tippkötter, Nils
T1  - Fractioning of lignocellulosic biomass: Scale-down and automation of thermal pretreatment for parameter optimization
T2  - Chemie Ingenieur Technik
N2  - In order to efficiently convert lignocellulose, it is often necessary to conduct a pretreatment. The biomass considered in this study typically comprises of agricultural and horticultural residues, as well as beechwood. A very environmentally friendly method, namely, fungal pretreatment using white-rot fungi, leads to an enhanced enzymatic hydrolysis. In contrast to other processes presented, the energy input is extremely low. However, the fungal growth on the lignocellulosic substrates takes several weeks at least in order to be effective. Thus, the reduction of chemicals and energy for thermal processing is a target of our current research. Liquid hot water (LHW) and solvent-based pretreatment (OrganoSolv) require more complex equipment, as they depend on high temperatures (160 – 180 °C) and enhanced pressure (up to 20 bar). However, they prove to be promising processes in regard to the fractioning of lignocellulose. For optimal lignin recovery the parameters differ from those established in cellulose extraction. A novel screening system scaled down to a reaction volume of 100 mL has been developed and successfully tested for this purpose.
Y1  - 2016
U6  - https://doi.org/10.1002/cite.201650288
SN  - 0009-286X
SN  - 1522-2640 (eISSN)
N1  - ProcessNet-Jahrestagung und 32. DECHEMA-Jahrestagung der Biotechnologen 2016, 12. - 15. September 2016, Eurogress Aachen
VL  - 88
IS  - 9
SP  - 1229
PB  - Wiley-VCH
CY  - Weinheim
ER  -