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Wachter S, Angevin T, Bubna N, Tan A, Cichy A, Brown D, Wolfe LS, Sappington R, Lilla E, Berry L, Grismer D, Orth C, Blanusa M, Mostafa S, Kaufmann H, Felderer K. Application of platform process development approaches to the manufacturing of Mabcalin™ bispecifics. J Biotechnol 2023; 377:13-22. [PMID: 37820750 DOI: 10.1016/j.jbiotec.2023.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/28/2023] [Accepted: 10/06/2023] [Indexed: 10/13/2023]
Abstract
Bispecific biotherapeutics offer potent and highly specific treatment options in oncology and immuno-oncology. However, many bispecific formats are prone to high levels of aggregation and instability, leading to prolonged development timelines, inefficient manufacturing, and high costs. The novel class of Mabcalin™ molecules consist of Anticalin® proteins fused to an IgG and are currently being evaluated in pre-clinical and clinical studies. Here, we describe a robust high-yield manufacturing platform for these therapeutic fusion proteins providing data up to commercially relevant scales. A platform upstream process was established for one of the Mabcalin bispecifics and then applied to other clinically relevant drug candidates with different IgG target specificities. Process performance was compared in 3 L bioreactors and production was scaled-up to up to 1000 L for confirmation. The Mabcalin proteins' structural and biophysical similarities enabled a downstream platform approach consisting of initial protein A capture, viral inactivation, mixed-mode anion exchange polishing, second polishing by cation exchange or hydrophobic interaction chromatography, viral filtration, buffer exchange and concentration by ultrafiltration/diafiltration. All three processes met their target specifications and achieved comparable clearance of impurities and product yields across scales. The described platform approach provides a fast and economic path to process confirmation and is well comparable to classical monoclonal antibody approaches in terms of costs and time to clinic.
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Affiliation(s)
- Stefanie Wachter
- Pieris Pharmaceuticals GmbH, Zeppelinstr. 3, Hallbergmoos 85399 Germany.
| | - Thibaut Angevin
- Pieris Pharmaceuticals GmbH, Zeppelinstr. 3, Hallbergmoos 85399 Germany
| | - Niket Bubna
- KBI Biopharma, 4117 Emperor Blvd, Suite 200, Durham, NC 27703, USA
| | - Adelene Tan
- Pieris Pharmaceuticals GmbH, Zeppelinstr. 3, Hallbergmoos 85399 Germany
| | - Adam Cichy
- Pieris Pharmaceuticals GmbH, Zeppelinstr. 3, Hallbergmoos 85399 Germany
| | - David Brown
- KBI Biopharma, 4117 Emperor Blvd, Suite 200, Durham, NC 27703, USA
| | - Leslie S Wolfe
- KBI Biopharma, 4117 Emperor Blvd, Suite 200, Durham, NC 27703, USA
| | - Ryan Sappington
- KBI Biopharma, 4117 Emperor Blvd, Suite 200, Durham, NC 27703, USA
| | - Edward Lilla
- KBI Biopharma, 4117 Emperor Blvd, Suite 200, Durham, NC 27703, USA
| | - Luke Berry
- KBI Biopharma, 4117 Emperor Blvd, Suite 200, Durham, NC 27703, USA
| | - Dane Grismer
- KBI Biopharma, 4117 Emperor Blvd, Suite 200, Durham, NC 27703, USA
| | - Christian Orth
- Pieris Pharmaceuticals GmbH, Zeppelinstr. 3, Hallbergmoos 85399 Germany
| | - Milan Blanusa
- Pieris Pharmaceuticals GmbH, Zeppelinstr. 3, Hallbergmoos 85399 Germany
| | - Sigma Mostafa
- KBI Biopharma, 4117 Emperor Blvd, Suite 200, Durham, NC 27703, USA
| | - Hitto Kaufmann
- Pieris Pharmaceuticals GmbH, Zeppelinstr. 3, Hallbergmoos 85399 Germany
| | - Karin Felderer
- Pieris Pharmaceuticals GmbH, Zeppelinstr. 3, Hallbergmoos 85399 Germany
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Kaufmann H, Biaggioni I, Wang W, Haumann B, Vickery R. Ampreloxetine (TD-9855), a norepinephrine reuptake inhibitor, in neurogenic orthostatic hypotension associated with synucleinopathies: phase 2 dose-escalation and double-blind efficacy studies. Parkinsonism Relat Disord 2020. [DOI: 10.1016/j.parkreldis.2020.06.302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Kaufmann H, Biaggioni I, Wang W, Haumann B, Vickery R. Effects of once-daily ampreloxetine (TD-9855), a norepinephrine reuptake inhibitor, on blood pressure in subjects with symptomatic neurogenic orthostatic hypotension. Parkinsonism Relat Disord 2020. [DOI: 10.1016/j.parkreldis.2020.06.288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kaufmann H, Biaggioni I, Wang W, Haumann B, Vickery R. Durability of effect and safety of open-label ampreloxetine (TD-9855), a norepinephrine reuptake inhibitor, for symptomatic treatment of neurogenic orthostatic hypotension. Parkinsonism Relat Disord 2020. [DOI: 10.1016/j.parkreldis.2020.06.303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
Eine Analyse von mehreren in der Literatur mitgeteilten und nach dem Verfahren von Boag dargestellten Behandlungsergebnissen bei tödlich verlaufenden Erkrankungen ergibt, daß die Streuungen der zugrunde liegenden Verteilungen nicht wesentlich verschieden sind. Unter Annahme einer gemeinsamen Streuung von 0,45 wird ein Nomogramm für einen orientierenden Signifikanztest mit α = 0.05 entwickelt.
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Kaufmann H, Ruster T, Schmiegelow CT, Luda MA, Kaushal V, Schulz J, von Lindenfels D, Schmidt-Kaler F, Poschinger UG. Scalable Creation of Long-Lived Multipartite Entanglement. Phys Rev Lett 2017; 119:150503. [PMID: 29077443 DOI: 10.1103/physrevlett.119.150503] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Indexed: 06/07/2023]
Abstract
We demonstrate the deterministic generation of multipartite entanglement based on scalable methods. Four qubits are encoded in ^{40}Ca^{+}, stored in a microstructured segmented Paul trap. These qubits are sequentially entangled by laser-driven pairwise gate operations. Between these, the qubit register is dynamically reconfigured via ion shuttling operations, where ion crystals are separated and merged, and ions are moved in and out of a fixed laser interaction zone. A sequence consisting of three pairwise entangling gates yields a four-ion Greenberger-Horne-Zeilinger state |ψ⟩=(1/sqrt[2])(|0000⟩+|1111⟩), and full quantum state tomography reveals a state fidelity of 94.4(3)%. We analyze the decoherence of this state and employ dynamic decoupling on the spatially distributed constituents to maintain 69(5)% coherence at a storage time of 1.1 sec.
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Affiliation(s)
- H Kaufmann
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - T Ruster
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - C T Schmiegelow
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - M A Luda
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - V Kaushal
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - J Schulz
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - D von Lindenfels
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - F Schmidt-Kaler
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - U G Poschinger
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
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Brandl MF, van Mourik MW, Postler L, Nolf A, Lakhmanskiy K, Paiva RR, Möller S, Daniilidis N, Häffner H, Kaushal V, Ruster T, Warschburger C, Kaufmann H, Poschinger UG, Schmidt-Kaler F, Schindler P, Monz T, Blatt R. Cryogenic setup for trapped ion quantum computing. Rev Sci Instrum 2016; 87:113103. [PMID: 27910317 DOI: 10.1063/1.4966970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We report on the design of a cryogenic setup for trapped ion quantum computing containing a segmented surface electrode trap. The heat shield of our cryostat is designed to attenuate alternating magnetic field noise, resulting in 120 dB reduction of 50 Hz noise along the magnetic field axis. We combine this efficient magnetic shielding with high optical access required for single ion addressing as well as for efficient state detection by placing two lenses each with numerical aperture 0.23 inside the inner heat shield. The cryostat design incorporates vibration isolation to avoid decoherence of optical qubits due to the motion of the cryostat. We measure vibrations of the cryostat of less than ±20 nm over 2 s. In addition to the cryogenic apparatus, we describe the setup required for an operation with 40Ca+ and 88Sr+ ions. The instability of the laser manipulating the optical qubits in 40Ca+ is characterized by yielding a minimum of its Allan deviation of 2.4 ⋅ 10-15 at 0.33 s. To evaluate the performance of the apparatus, we trapped 40Ca+ ions, obtaining a heating rate of 2.14(16) phonons/s and a Gaussian decay of the Ramsey contrast with a 1/e-time of 18.2(8) ms.
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Affiliation(s)
- M F Brandl
- Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - M W van Mourik
- Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - L Postler
- Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - A Nolf
- Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - K Lakhmanskiy
- Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - R R Paiva
- Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - S Möller
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - N Daniilidis
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - H Häffner
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - V Kaushal
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - T Ruster
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - C Warschburger
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - H Kaufmann
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - U G Poschinger
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - F Schmidt-Kaler
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - P Schindler
- Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - T Monz
- Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - R Blatt
- Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
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Kaufmann H. Biologics manufacturing 3.0. N Biotechnol 2016. [DOI: 10.1016/j.nbt.2016.06.920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tastanova A, Schulz A, Folcher M, Tolstrup A, Puklowski A, Kaufmann H, Fussenegger M. Overexpression of YY1 increases the protein production in mammalian cells. J Biotechnol 2016; 219:72-85. [DOI: 10.1016/j.jbiotec.2015.12.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 12/02/2015] [Accepted: 12/09/2015] [Indexed: 01/07/2023]
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10
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Schmiegelow CT, Kaufmann H, Ruster T, Schulz J, Kaushal V, Hettrich M, Schmidt-Kaler F, Poschinger UG. Phase-Stable Free-Space Optical Lattices for Trapped Ions. Phys Rev Lett 2016; 116:033002. [PMID: 26849591 DOI: 10.1103/physrevlett.116.033002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Indexed: 06/05/2023]
Abstract
We demonstrate control of the absolute phase of an optical lattice with respect to a single trapped ion. The lattice is generated by off-resonant free-space laser beams, and we actively stabilize its phase by measuring its ac-Stark shift on a trapped ion. The ion is localized within the standing wave to better than 2% of its period. The locked lattice allows us to apply displacement operations via resonant optical forces with a controlled direction in phase space. Moreover, we observe the lattice-induced phase evolution of spin superposition states in order to analyze the relevant decoherence mechanisms. Finally, we employ lattice-induced phase shifts for inferring the variation of the ion position over the 157 μm range along the trap axis at accuracies of better than 6 nm.
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Affiliation(s)
- C T Schmiegelow
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - H Kaufmann
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - T Ruster
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - J Schulz
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - V Kaushal
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - M Hettrich
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - F Schmidt-Kaler
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - U G Poschinger
- Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
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11
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Palma J, Martinez J, Percival L, Fuente-Mora C, Norcliffe-Kaufmann L, Kaufmann H. Hypotension-induced vasopressin release distinguishes Lewy body disorders from multiple system atrophy. Auton Neurosci 2015. [DOI: 10.1016/j.autneu.2015.07.230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Martinez J, Palma J, Norcliffe-Kaufmann L, Perez M, Kaufmann H. Depression in Multiple System Atrophy: Impact on Quality of Life and Disease Progression. Auton Neurosci 2015. [DOI: 10.1016/j.autneu.2015.07.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Palma J, Perez M, Norcliffe-Kaufmann L, Kaufmann H. Determinants of sudden death during sleep in familial dysautonomia: A preliminary study. Auton Neurosci 2015. [DOI: 10.1016/j.autneu.2015.07.203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Hettrich M, Ruster T, Kaufmann H, Roos CF, Schmiegelow CT, Schmidt-Kaler F, Poschinger UG. Measurement of Dipole Matrix Elements with a Single Trapped Ion. Phys Rev Lett 2015; 115:143003. [PMID: 26551810 DOI: 10.1103/physrevlett.115.143003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Indexed: 06/05/2023]
Abstract
We demonstrate a method to determine dipole matrix elements by comparing measurements of dispersive and absorptive light ion interactions. We measure the matrix element pertaining to the Ca II H line, i.e., the 4(2)S(1/2)↔4(2)P(1/2) transition of (40)Ca(+), for which we find the value 2.8928(43) ea(0). Moreover, the method allows us to deduce the lifetime of the 4(2)P(1/2) state to be 6.904(26) ns, which is in agreement with predictions from recent theoretical calculations and resolves a long-standing discrepancy between calculated values and experimental results.
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Affiliation(s)
- M Hettrich
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - T Ruster
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - H Kaufmann
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - C F Roos
- Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Technikerstraße 21a, 6020 Innsbruck, Austria
- Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - C T Schmiegelow
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - F Schmidt-Kaler
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - U G Poschinger
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
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Kaufmann H. Complications in eye muscle surgery. Dev Ophthalmol 2015; 13:113-6. [PMID: 3595951 DOI: 10.1159/000413619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Strabologists consider postoperative loss of visual function as a severe and extremely rare complication. Other complications in eye muscle surgery are demonstrated.
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Puklowski A, Wenger T, Schatz S, Koenitzer J, Schaub J, Enenkel B, Khetan A, Kaufmann H, Tolstrup AB. BI-HEX®-GlymaxX® cells enable efficient production of next generation biomolecules with enhanced ADCC activity. BMC Proc 2013. [PMCID: PMC3980532 DOI: 10.1186/1753-6561-7-s6-p63] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Strotbek M, Florin L, Koenitzer J, Tolstrup A, Kaufmann H, Hausser A, Olayioye MA. Stable microRNA expression enhances therapeutic antibody productivity of Chinese hamster ovary cells. Metab Eng 2013; 20:157-66. [DOI: 10.1016/j.ymben.2013.10.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 09/24/2013] [Accepted: 10/11/2013] [Indexed: 11/25/2022]
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Singer W, Robertson D, Gilman S, Kaufmann H, Biaggioni I, Freeman R, Fealey R, Mandrekar J, Dupont W, Gehrking T, Schmelzer J, Sletten D, Gehrking J, Low P. Randomized Trial of Rifampicin in MSA: Primary Outcomes and Effect on Autonomic Function. Auton Neurosci 2013. [DOI: 10.1016/j.autneu.2013.05.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kaufmann H, Ulm S, Jacob G, Poschinger U, Landa H, Retzker A, Plenio MB, Schmidt-Kaler F. Precise experimental investigation of eigenmodes in a planar ion crystal. Phys Rev Lett 2012; 109:263003. [PMID: 23368557 DOI: 10.1103/physrevlett.109.263003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Indexed: 06/01/2023]
Abstract
The accurate characterization of eigenmodes and eigenfrequencies of two-dimensional ion crystals provides the foundation for the use of such structures for quantum simulation purposes. We present a combined experimental and theoretical study of two-dimensional ion crystals. We demonstrate that standard pseudopotential theory accurately predicts the positions of the ions and the location of structural transitions between different crystal configurations. However, pseudopotential theory is insufficient to determine eigenfrequencies of the two-dimensional ion crystals accurately but shows significant deviations from the experimental data obtained from resolved sideband spectroscopy. Agreement at the level of 2.5×10(-3) is found with the full time-dependent Coulomb theory using the Floquet-Lyapunov approach and the effect is understood from the dynamics of two-dimensional ion crystals in the Paul trap. The results represent initial steps towards an exploitation of these structures for quantum simulation schemes.
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Affiliation(s)
- H Kaufmann
- QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany
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Cadoni E, Dotta M, Forni D, Bianchi S, Kaufmann H. Strain rate effects on mechanical properties in tension of aluminium alloys used in armour applications. EPJ Web of Conferences 2012. [DOI: 10.1051/epjconf/20122605004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Gutierrez J, Adhikari I, Norcliffe-Kaufmann L, Axelrod F, Kaufmann H. 11. Brainstem reflexes in patients with familial dysautonomia. Clin Neurophysiol 2012. [DOI: 10.1016/j.clinph.2011.11.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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22
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Kaufmann H, Maurer M, Coelho T, Plante-Bordeneuve V, Rapezzi C, Suhr O, THAOS Investigators. Comparison of US and Non-US Patients with Familial Amyloid Polyneuropathy (FAP) and Familial Amyloid Cardiomyopathy (FAC) in THAOS - The Transthyretin Amyloidosis Outcomes Survey (P01.114). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p01.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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23
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Kaufmann H, Freeman R, Biaggioni I, Low P, Pedder S, Hewitt A, Mathias C. Treatment of Neurogenic Orthostatic Hypotension with Droxidopa: Results from a Multi-Center, Double-Blind, Randomized, Placebo-Controlled, Parallel Group, Induction Design Study (PL02.001). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.pl02.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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24
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Schmidt S, Gräf M, Kaufmann H, Lorenz B. [Surgery for strabismus sursoadductorius (congenital superior oblique palsy) in childhood]. Klin Monbl Augenheilkd 2011; 228:874-9. [PMID: 21997824 DOI: 10.1055/s-0031-1281759] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
PURPOSE The aim of this study was to evaluate the effect of inferior oblique muscle recession (IOR) in children with pure unilateral strabismus sursoadductorius (so-called congenital superior oblique palsy, CSOP) operated before age 11 years. PATIENTS AND METHODS A retrospective study of IOR in children with unilateral CSOP and surgery before age 11 years was undertaken. In most cases, recession and anteroposition of the anterior part of the inferior oblique tendon next to the lateral edge of the inferior rectus muscle was performed without fixation of the posterior part of the tendon. Main outcome measures were change in abnormal head tilt, change in vertical deviation, both in straight and contralateral side gaze, and evaluation of squint angles. RESULTS Between 1997 and 2007, 36 consecutive children (aged 2 -10 years; 27 boys, 9 girls) received IOR for unilateral CSOP. The dose of IOR ranged between 6 and 12 mm. Vertical deviation in straight and contralateral gaze was reduced from median 5° (range 0 - 11°) and 12° (3 - 20°) to 0° (-2 - 8°) and 1° (-5 - 13°), respectively. Abnormal head tilt towards the contralateral shoulder was reduced from median 10° (0 - 20°) to 0° (-2,5 - 10°). Three children (8 %) received further extraocular muscle surgery within 2 years, one because of persistent hyperdeviation, and two because of consecutive hypodeviation of the operated eye. CONCLUSIONS The results indicate that IOR with fixation of only the anterior part of the inferior oblique to the sclera is an effective treatment for strabismus sursoadductorius/CSOP in children. Undercorrection into a residual, well compensated stage is a satisfying result. Both overcorrection and elevation deficiency were rare.
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Affiliation(s)
- S Schmidt
- Klinik und Poliklinik für Augenheilkunde, Universitätsklinikum Gießen und Marburg, Standort Gießen, Gießen.
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Perez M, Norcliffe-Kaufmann L, Reyes J, Axelrod F, Kaufmann H. Is end-tidal CO2 a valid measurement to assess hypoventilation in patients with familial dysautonomia? Auton Neurosci 2011. [DOI: 10.1016/j.autneu.2011.05.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Norcliffe-Kaufmann L, Axelrod F, Kaufmann H. The norepinephrine paradox in hereditary sensory and autonomic neuropathy type IV. Auton Neurosci 2011. [DOI: 10.1016/j.autneu.2011.05.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Tijero Merino B, Gomez-Esteban J, Kaufmann H, Llorens V, Zarranz J. Cardiac sympathetic denervation in symptomatic and asymptomatic carriers of the E46K mutation in the synuclein gene. Auton Neurosci 2011. [DOI: 10.1016/j.autneu.2011.05.192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Florin L, Lipske C, Becker E, Kaufmann H. Supplementation of serum free media with HT is not sufficient to restore growth properties of DHFR-/- cells in fed-batch processes - Implications for designing novel CHO-based expression platforms. J Biotechnol 2011; 152:189-93. [PMID: 21345355 DOI: 10.1016/j.jbiotec.2011.02.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2010] [Revised: 01/27/2011] [Accepted: 02/05/2011] [Indexed: 11/19/2022]
Abstract
DHFR-deficient CHO cells are the most commonly used host cells in the biopharmaceutical industry and over the years, individual substrains have evolved, some have been engineered with improved properties and platform technologies have been designed around them. Unexpectedly, we have observed that different DHFR-deficient CHO cells show only poor growth in fed-batch cultures even in HT supplemented medium, whereas antibody producer cells derived from these hosts achieved least 2-3 fold higher peak cell densities. Using a set of different expression vectors, we were able to show that this impaired growth performance was not due to the selection procedure possibly favouring fast growing clones, but a direct consequence of DHFR deficiency. Re-introduction of the DHFR gene reproducibly restored the growth phenotype to the level of wild-type CHO cells or even beyond which seemed to be dose-dependent. The requirement for a functional DHFR gene to achieve optimal growth under production conditions has direct implications for cell line generation since it suggests that changing to a selection system other than DHFR would require another CHO host which - especially for transgenic CHO strains and tailor-suited process platforms - this could mean significant investments and potential changes in product quality. In these cases, DHFR engineering of the current CHO-DG44 or DuxB11-based host could be an attractive alternative.
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Affiliation(s)
- Lore Florin
- Boehringer Ingelheim Pharma GmbH & Co. KG, BP Process Science, 88397 Biberach an der Riss, Germany.
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Graber JJ, Sherman FT, Kaufmann H, Kolodny EH, Sathe S. Vitamin B12-responsive severe leukoencephalopathy and autonomic dysfunction in a patient with "normal" serum B12 levels. J Neurol Neurosurg Psychiatry 2010; 81:1369-71. [PMID: 20587489 DOI: 10.1136/jnnp.2009.178657] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Leukoencephalopathy and autonomic dysfunction have been described in individuals with very low serum B(12) levels (<200 pg/ml), in addition to psychiatric changes, neuropathy, dementia and subacute combined degeneration. Elevated homocysteine and methylmalonic acid levels are considered more sensitive and specific for evaluating truly functional B(12) deficiency. A previously healthy 62-year-old woman developed depression and cognitive deficits with autonomic dysfunction that progressed over the course of 5 years. The patient had progressive, severe leukoencephalopathy on multiple MRI scans over 5 years. Serum B(12) levels ranged from 267 to 447 pg/ml. Homocysteine and methylmalonic acid levels were normal. Testing for antibody to intrinsic factor was positive, consistent with pernicious anaemia. After treatment with intramuscular B(12) injections (1000 μg daily for 1 week, weekly for 6 weeks, then monthly), she made a remarkable clinical recovery but remained amnesic for major events of the last 5 years. Repeat MRI showed partial resolution of white matter changes. Serum B(12), homocysteine and methylmalonic acid levels are unreliable predictors of B(12)-responsive neurologic disorders, and should be thoroughly investigated and presumptively treated in patients with unexplained leukoencephalopathy because even long-standing deficits may be reversible.
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Affiliation(s)
- J J Graber
- Department of Neuro-oncology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
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Kaufmann H, Terefe D, Yasmin A, Biber A, Kuehr A, Debener T. CLONING AND ANALYSIS OF RDR1, A BLACK SPOT RESISTANCE GENE FROM ROSES. ACTA ACUST UNITED AC 2010. [DOI: 10.17660/actahortic.2010.870.25] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Abstract
HISTORY AND CLINICAL FINDINGS A 55-year-old woman was referred to our hospital with signs of cerebral ischaemia i. e. dysarthria and weakness of the buccal branch of the facial nerve. Additionally the patient reported symptoms of heart failure NYHA class II. Six months earlier the patient also had visual disturbances. Magnetic resonance imaging (MRI) had shown ischaemic lesions. INVESTIGATIONS A recent MRI confirmed the suspected diagnosis of ischaemia in the territory supplied by the left middle cerebral artery. The echocardiography was characterized by a reduced left ventricular ejection fraction (25 %) due to isolated ventricular non-compaction (IVNC). TREATMENT AND COURSE The patient was treated with a combination therapy including ACE-inhibitors and diuretics. An oral anticoagulation was recommended as secondary prophylaxis. At the time of discharge the patient had no residual neurological deficits. CONCLUSION Isolated ventricular non-compaction is a rare type of cardiomyopathy. Possible manifestations include systemic embolic events, arrhythmias and heart failure. Echocardiography is the investigation of choice in identifying characteristic changes.
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Affiliation(s)
- T Münkle
- Hegau-Bodensee-Klinikum, I. Medizinische Klinik, Singen/Hohentwiel.
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Stamm-Balderjahn S, Jagota A, Barz G, Kaufmann H, Schönfeld N. „Schüler in der Klinik“– ein wirksames Berliner Tabakpräventionsprojekt. Pneumologie 2010. [DOI: 10.1055/s-0030-1251093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Birzele F, Schaub J, Rust W, Clemens C, Baum P, Kaufmann H, Weith A, Schulz TW, Hildebrandt T. Into the unknown: expression profiling without genome sequence information in CHO by next generation sequencing. Nucleic Acids Res 2010; 38:3999-4010. [PMID: 20194116 PMCID: PMC2896516 DOI: 10.1093/nar/gkq116] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The arrival of next-generation sequencing (NGS) technologies has led to novel opportunities for expression profiling and genome analysis by utilizing vast amounts of short read sequence data. Here, we demonstrate that expression profiling in organisms lacking any genome or transcriptome sequence information is feasible by combining Illumina’s mRNA-seq technology with a novel bioinformatics pipeline that integrates assembled and annotated Chinese hamster ovary (CHO) sequences with information derived from related organisms. We applied this pipeline to the analysis of CHO cells which were chosen as a model system owing to its relevance in the production of therapeutic proteins. Specifically, we analysed CHO cells undergoing butyrate treatment which is known to affect cell cycle regulation and to increase the specific productivity of recombinant proteins. By this means, we identified sequences for >13 000 CHO genes which added sequence information of ∼5000 novel genes to the CHO model. More than 6000 transcript sequences are predicted to be complete, as they covered >95% of the corresponding mouse orthologs. Detailed analysis of selected biological functions such as DNA replication and cell cycle control, demonstrated the potential of NGS expression profiling in organisms without extended genome sequence to improve both data quantity and quality.
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Affiliation(s)
- Fabian Birzele
- Department of Pulmonary Research, Group Genomics, Boehringer Ingelheim Pharma GmbH & Co KG, Birkendorferstrasse 67, 88397 Biberach an der Riss, Germany.
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Schaub J, Clemens C, Schorn P, Hildebrandt T, Rust W, Mennerich D, Kaufmann H, Schulz TW. CHO gene expression profiling in biopharmaceutical process analysis and design. Biotechnol Bioeng 2010; 105:431-8. [DOI: 10.1002/bit.22549] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Becker E, Florin L, Pfizenmaier K, Kaufmann H. Evaluation of a combinatorial cell engineering approach to overcome apoptotic effects in XBP-1(s) expressing cells. J Biotechnol 2009; 146:198-206. [PMID: 19958799 DOI: 10.1016/j.jbiotec.2009.11.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2009] [Revised: 11/09/2009] [Accepted: 11/24/2009] [Indexed: 11/26/2022]
Abstract
Genetic engineering of producer cell lines for production of therapeutic antibodies in order to increase the yield of production processes remains a continuing challenge. Recently it was shown that heterologous expression of the active, spliced form of human X-box binding protein 1 (XBP-1(s)) can increase the amount of secreted protein products in mammalian cell culture processes. However, a prerequisite for the industrial application of any cell engineering approach is the ability to generate monoclonal cell lines that stably express the engineering gene to maintain the desired phenotype. Here, we show a decrease in heterologous human XBP-1(s) expression in CHO production cells producing a therapeutic antibody product monitored over a prolonged period in serial culture. Colony formation assays (CFA) in CHO-K1 cells reveal a general survival disadvantage conferred by XBP-1(s) in this cell type. We aimed to rescue this phenotype by expressing the caspase-inhibitor XIAP (x-linked inhibitor of apoptosis). Using a set of bicistronic expression vectors we engineered an antibody producing CHO cell line with XBP-1(s) and XIAP alone and in combination. Interestingly, co-expression of both genes resulted in the highest specific productivities (Qp) and final titers in a serum-free fed-batch process in chemically defined media. Thus, the combination of secretion and anti-apoptotic engineering provides an interesting approach for future applications in industrial mammalian cell culture.
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Affiliation(s)
- Eric Becker
- Institute of Cell Biology and Immunology, University of Stuttgart, 70569 Stuttgart, Germany
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Kundert J, Kaufmann H. Extrakardiale und extrapulmonale Hinweise auf den Thoraxaufnahmen Neugeborener und junger Säuglinge mit gestörter Atmung*. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1228324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kaufmann H, Mellin P, Salloch RR. Ergebnisse der Beckenangiographie bei Blasenkarzinomen. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1228033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Schmitt G, Kaufmann H, Scheidt J. Röntgendiagnostische Befunde und Strahlentherapie des primären Ureterkarzinoms. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1229235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Florin L, Pegel A, Becker E, Hausser A, Olayioye MA, Kaufmann H. Heterologous expression of the lipid transfer protein CERT increases therapeutic protein productivity of mammalian cells. J Biotechnol 2009; 141:84-90. [PMID: 19428735 DOI: 10.1016/j.jbiotec.2009.02.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2008] [Revised: 02/11/2009] [Accepted: 02/17/2009] [Indexed: 11/27/2022]
Abstract
Recent studies have demonstrated that the introduction of transgenes regulating protein transport or affecting post-translational modifications can further improve industrial processes for the production of therapeutic proteins in mammalian cells. Our study on improving therapeutic protein production in CHO cells by heterologous expression of the ceramide transfer protein (CERT) was initiated by the recent discovery that CERT is involved in protein kinase D (PKD)-dependent protein transport from the Golgi to the plasma membrane. We generated a set of CHO DG44 cell lines by stable integration of constructs expressing either CERT wild-type or CERT S132A, a mutant conferring increased lipid transfer activity, or a mock plasmid. CHO cells expressing heterologous CERT demonstrated significantly higher specific productivities of the therapeutic protein HSA when grown in inoculum suspension cultures. This effect translated into significantly increased overall HSA titers in a fed-batch format where cells are grown in chemically defined serum-free media. Furthermore, we could show that CERT also enhanced monoclonal antibody secretion in two IgG production cell lines with different basal productivities. The data demonstrate the potential of CERT engineering to improve mammalian cell culture production processes to yield high amounts of a therapeutic protein product of desired quality. To our knowledge, this is the first study showing a bottle neck in recombinant protein secretion at the Golgi complex in mammalian cells.
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Affiliation(s)
- Lore Florin
- Boehringer Ingelheim Pharma GmbH & Co KG, BP Process Science, Biberach an der Riss, Germany
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Gilman S, Wenning GK, Low PA, Brooks DJ, Mathias CJ, Trojanowski JQ, Wood NW, Colosimo C, Dürr A, Fowler CJ, Kaufmann H, Klockgether T, Lees A, Poewe W, Quinn N, Revesz T, Robertson D, Sandroni P, Seppi K, Vidailhet M. Second consensus statement on the diagnosis of multiple system atrophy. Neurology 2008; 71:670-6. [PMID: 18725592 DOI: 10.1212/01.wnl.0000324625.00404.15] [Citation(s) in RCA: 2165] [Impact Index Per Article: 135.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND A consensus conference on multiple system atrophy (MSA) in 1998 established criteria for diagnosis that have been accepted widely. Since then, clinical, laboratory, neuropathologic, and imaging studies have advanced the field, requiring a fresh evaluation of diagnostic criteria. We held a second consensus conference in 2007 and present the results here. METHODS Experts in the clinical, neuropathologic, and imaging aspects of MSA were invited to participate in a 2-day consensus conference. Participants were divided into five groups, consisting of specialists in the parkinsonian, cerebellar, autonomic, neuropathologic, and imaging aspects of the disorder. Each group independently wrote diagnostic criteria for its area of expertise in advance of the meeting. These criteria were discussed and reconciled during the meeting using consensus methodology. RESULTS The new criteria retain the diagnostic categories of MSA with predominant parkinsonism and MSA with predominant cerebellar ataxia to designate the predominant motor features and also retain the designations of definite, probable, and possible MSA. Definite MSA requires neuropathologic demonstration of CNS alpha-synuclein-positive glial cytoplasmic inclusions with neurodegenerative changes in striatonigral or olivopontocerebellar structures. Probable MSA requires a sporadic, progressive adult-onset disorder including rigorously defined autonomic failure and poorly levodopa-responsive parkinsonism or cerebellar ataxia. Possible MSA requires a sporadic, progressive adult-onset disease including parkinsonism or cerebellar ataxia and at least one feature suggesting autonomic dysfunction plus one other feature that may be a clinical or a neuroimaging abnormality. CONCLUSIONS These new criteria have simplified the previous criteria, have incorporated current knowledge, and are expected to enhance future assessments of the disease.
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Affiliation(s)
- S Gilman
- Department of Neurology, University of Michigan, 300 N. Ingalls St., 3D15, Ann Arbor, MI 48109-5489, USA.
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Gutierrez J, Hernandez H, Lestayo Z, Lara G, Zaldivar T, Mustelier H, Kaufmann H. 149. Vasomotor adrenergic vs. cardiovagal autonomic dysfunction at the early stage of peripheral neuropathies. Clin Neurophysiol 2008. [DOI: 10.1016/j.clinph.2008.04.165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Becker E, Florin L, Pfizenmaier K, Kaufmann H. An XBP-1 dependent bottle-neck in production of IgG subtype antibodies in chemically defined serum-free Chinese hamster ovary (CHO) fed-batch processes. J Biotechnol 2008; 135:217-23. [PMID: 18448183 DOI: 10.1016/j.jbiotec.2008.03.008] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2007] [Revised: 02/21/2008] [Accepted: 03/11/2008] [Indexed: 11/26/2022]
Abstract
The optimization of production processes for therapeutic antibodies is a continuing challenge in pharmaceutical biotechnology. Although it could be demonstrated that vector design and host cell engineering can improve transcriptional and translational efficiency and thereby result in generation of high producer cell lines, it is not clear whether introduction of transgenes that regulate protein transport or affect post-translational modifications could further improve such industrial processes. Here, we show that heterologous expression of the transcription factor X-box binding protein-1 (XBP-1) can lead to an increase in endoplasmic reticulum (ER) content and specific therapeutic antibody productivity of Chinese hamster ovary (CHO)-DG44 cells in inoculum suspension cultures. This effect translates into 40% increased overall antibody titers in a fed-batch format where cells are grown in chemically defined serum-free media. Protein-A purified antibody products from mock-transfected cells and XBP-1 transfected cells were found to be of comparable quality with regard to glycosylation pattern and physicochemical characteristics. The data demonstrate the potential of XBP-1 engineering to improve mammalian cell culture production processes to yield high amounts of a therapeutic protein product of desired quality.
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Affiliation(s)
- Eric Becker
- Boehringer Ingelheim Pharma GmbH & Co. KG, BP Process Science, Birkendorferstrasse 65, 88397 Biberach an der Riss, Germany
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Kaufmann H, Ackermann J, Odelga V, Sagaster V, Nösslinger T, Pfeilstöcker M, Keck A, Ludwig H, Gisslinger H, Drach J. Cytogenetic patterns in multiple myeloma after a phase of preceding MGUS. Eur J Clin Invest 2008; 38:53-60. [PMID: 18173551 DOI: 10.1111/j.1365-2362.2007.01903.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Presenting the same histological diagnosis, multiple myeloma (MM) shows a large genomic variety, resulting in variable times of overall survival. MATERIALS AND METHODS To investigate major cytogenetic categories (any 14q-translocation, t(11;14), t(4;14), 13q-deletions, 17p-deletions) and their clinical consequences in MM after a pre-existing monoclonal gammopathy (MM post-MGUS), we performed a comparative analysis of 41 patients with MM post-MGUS and 287 patients with unknown prior history MM (U-MM). RESULTS In MM post-MGUS, a t(11;14) was found to be more frequent than in U-MM (24% vs. 14%) and it was associated with significantly shortened survival (24 months vs. 70 months in U-MM; P = 0.01). MM post-MGUS was further characterized by a higher frequency of 13q-deletions only (absence of all other specific abnormalities; 28% vs. 12% in U-MM; P = 0.02). A 13q-deletion only was an indicator of long survival in MM post-MGUS (median not yet reached) as opposed to U-MM (median survival, 29 months; P = 0.001). 17p-deletions were infrequent in MM post-MGUS (3% vs. 16% in U-MM; P = 0.04). Survival times for patients with t(4;14) and/or 17p-deletions and other abnormalities were similar in both MM patient cohorts. CONCLUSIONS Our data suggest that t(11;14) and 13q-deletions have distinct prognostic implications in the context of MM post-MGUS.
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Affiliation(s)
- H Kaufmann
- Medical University of Vienna, Department of Medicine I, Vienna, Austria.
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Sagaster V, Kaufmann H, Odelga V, Ackermann J, Gisslinger H, Rabitsch W, Zojer N, Ludwig H, Nösslinger T, Zielinski C, Drach J. Chromosomal abnormalities of young multiple myeloma patients (<45 yr) are not different from those of other age groups and are independent of stage according to the International Staging System. Eur J Haematol 2007; 78:227-34. [PMID: 17253972 DOI: 10.1111/j.1600-0609.2006.00807.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Little is known about tumor-related prognostic factors, in particular specific chromosomal abnormalities, in young patients with multiple myeloma (MM). We therefore investigated the chromosomal pattern by interphase fluorescence in situ hybridization (chromosomes 13q14, 14q32-translocations, chromosomes associated with hyperdiploidy) in 38 young patients with MM (age <45 yr) and compared the results with those observed in 69 patients with intermediate age (45-70 yr) and 64 elderly patients (age >70 yr). All chromosomal patterns were not significantly different between the three age cohorts. Similarly, standard MM parameters were equally distributed between these MM patient populations. However, survival by the International Staging System (ISS) for MM revealed marked differences between stage I/II (median survival not yet reached) and stage III (23.4 months; P < 0.0003) among young MM patients. A significant survival difference between ISS-stage I/II and ISS-stage III patients was also noted in the intermediate age group (median 65.4 months vs. 24.6 months; P = 0.0009). However, this difference disappeared among elderly MM patients (39.6 months in ISS-stage I/II vs. 32 months in ISS-stage III patients; P = 0.94), but it was unrelated to the cytogenetic pattern. Our results indicate that MM in young patients does not represent a distinct biologic entity, and that short survival of younger MM patients at ISS-stage III is independent of the molecular cytogenetic pattern.
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Affiliation(s)
- V Sagaster
- Department of Internal Medicine I, Clinical Division of Oncology, Medical University of Vienna, Vienna, Austria
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