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Basilico F, Maffini S, Weir JR, Prumbaum D, Rojas AM, Zimniak T, De Antoni A, Jeganathan S, Voss B, van Gerwen S, Krenn V, Massimiliano L, Valencia A, Vetter IR, Herzog F, Raunser S, Pasqualato S, Musacchio A. The pseudo GTPase CENP-M drives human kinetochore assembly. eLife 2014; 3:e02978. [PMID: 25006165 PMCID: PMC4080450 DOI: 10.7554/elife.02978] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Kinetochores, multi-subunit complexes that assemble at the interface with centromeres, bind spindle microtubules to ensure faithful delivery of chromosomes during cell division. The configuration and function of the kinetochore-centromere interface is poorly understood. We report that a protein at this interface, CENP-M, is structurally and evolutionarily related to small GTPases but is incapable of GTP-binding and conformational switching. We show that CENP-M is crucially required for the assembly and stability of a tetramer also comprising CENP-I, CENP-H, and CENP-K, the HIKM complex, which we extensively characterize through a combination of structural, biochemical, and cell biological approaches. A point mutant affecting the CENP-M/CENP-I interaction hampers kinetochore assembly and chromosome alignment and prevents kinetochore recruitment of the CENP-T/W complex, questioning a role of CENP-T/W as founder of an independent axis of kinetochore assembly. Our studies identify a single pathway having CENP-C as founder, and CENP-H/I/K/M and CENP-T/W as CENP-C-dependent followers.DOI: http://dx.doi.org/10.7554/eLife.02978.001.
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Rinaldi I, Brons S, Jäkel O, Voss B, Parodi K. Experimental investigations on carbon ion scanning radiography using a range telescope. Phys Med Biol 2014. [PMID: 24842455 DOI: 10.1088/0031‐9155/59/12/3041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Ion beams offer an excellent tumor-dose conformality due to their inverted depth-dose profile and finite range in tissue, the Bragg peak (BP). However, they introduce sensitivity to range uncertainties. Imaging techniques play an increasingly important role in ion beam therapy to support precise diagnosis and identification of the target volume at the planning stage as well as to ensure the correspondence between the planning and treatment situation at the actual irradiation. For the purpose of improved treatment quality, ion-based radiographic images could be acquired at the treatment site before or during treatment and be employed to monitor the patient positioning and to check the patient-specific ion range. This work presents the initial experimental investigations carried out to address the feasibility of carbon ion radiography at the Heidelberg ion therapy center using a prototype range telescope set-up and an active raster scanning ion beam delivery system. Bragg curves are measured with a stack of ionization chambers (IC) synchronously to the beam delivery. The position of the BP is extracted from the data by locating the channel of maximum current signal for each delivered beam. Each BP is associated to the lateral and vertical positions of the scanned raster point extrapolated from the beam monitor system to build up a radiography. The radiographic images are converted into water equivalent thickness (WET) based on two calibrations of the detector. Radiographies of two phantoms of different complexities are reconstructed and their image quality is analyzed. A novel method proposed to increase the nominal range resolution of the IC stack is applied to the carbon ion radiography of an Alderson head phantom. Moreover, an x-ray digitally reconstructed radiography of the same anthropomorphic head phantom is converted in WET through the clinically used ion range calibration curve and compared with the carbon ion radiography based on a γ-index approach, yielding a good correspondence in terms of absolute WET within ±3%, 3 mm distance-to-agreement and, 87% passing ratio. Imaging artifacts at interfaces within the irradiated phantom due to the finite size of the beam, resulting in multiple maxima, are addressed. Overall, this work demonstrates the feasibility of the prototype range telescope to acquire ion-based transmission imaging with a resolution of up to 0.8 mm WET.
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Abstract
Abstract
A special method of preparation of cholesteric liquid crystals is reported, which is useful for the investigation of cholesteric structures with very small pitches. This freeze-etching method makes it possible to observe pitches with scanning electron microscopy without influencing the structure by solvent molecules.
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Rinaldi I, Marcelos T, Magallanes L, Takechi M, Brons S, Jaekel O, Voss B, Parodi K. WE-D-BRF-04: Experimental Investigations On Ion Radiography with Beam Scanning Using a Range Telescope. Med Phys 2014. [DOI: 10.1118/1.4889402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Rinaldi I, Brons S, Jäkel O, Voss B, Parodi K. Experimental investigations on carbon ion scanning radiography using a range telescope. Phys Med Biol 2014; 59:3041-57. [DOI: 10.1088/0031-9155/59/12/3041] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Elhmidi Y, Bleiziffer S, Piazza N, Voss B, Krane M, Deutsch MA, Lange R. Long-term results after transcatheter aortic valve implantation: what do we know today? Curr Cardiol Rev 2014; 9:295-8. [PMID: 24313645 PMCID: PMC3941092 DOI: 10.2174/1573403x09666131202124227] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 08/20/2012] [Accepted: 09/28/2012] [Indexed: 01/11/2023] Open
Abstract
Transcatheter aortic valve implantation (TAVI) is evolving rapidly as a therapeutic option in patients deemed to be at high risk for surgical aortic valve replacement. Early outcome and survival of controlled feasibility trials and single- center experience with TAVI have been previously reported. Valve performance and hemodynamics seem to improve significantly after TAVI. Long-term outcome up to 3 years have been demonstrated in recent studies. Admittedly, the results are encouraging with a survival rate at 2 and 3 years ranging from 62 to 74% and from 56 to 61% respectively. The improvement in hemodynamical and clinical status sustained beyond the 3 years follows up. However, paravalvular leakage after TAVI remains an important issue in this rapidely evolving field.
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Doppler S, Dreßen M, Lahm H, Werner A, Deutsch MA, Kornek M, Hörer J, Voss B, Schreiber C, Lange R, Krane M. MZF1 is differentially expressed in human cardiac tissue of different age and c-KIT+ progenitor cells in the human adult heart. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Günzinger R, Günther T, Minkner K, Rondak I, Mazzitelli D, Voss B, Lange R. Mitral valve repair with the Medtronic Profile 3D® annuloplasty ring - a single center experience. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Fiegl K, Günzinger R, Rondak I, Vincze D, Voss B, Lange R. Matched comparison of two different biological prostheses for complete supraannular aortic valve replacement. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Deutsch MA, Prinzing A, Badiu C, Elhmidi Y, Wottke M, Krane M, Voss B, Günzinger R, Lange R. Early hemodynamic performance of the complete supraannular Trifecta aortic valve bioprosthesis - a single-center experience in a series of 608 patients. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Badiu CC, Deutsch MA, Sideris C, Krane M, Hettich I, Voss B, Mazzitelli D, Lange R. Aortic root replacement: comparison of clinical outcome between different surgical techniques. Eur J Cardiothorac Surg 2014; 46:685-92; discussion 692. [DOI: 10.1093/ejcts/ezt647] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Drexler E, Voss B, Amunts K, Schneider F, Habel U. Mild Cognitive Impairment: Advantages of a Comprehensive Neuropsychological Assessment. Curr Alzheimer Res 2013; 10:1098-106. [DOI: 10.2174/15672050113109990014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 06/25/2012] [Accepted: 06/26/2012] [Indexed: 11/22/2022]
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Pellereau E, Bélier G, Boutoux G, Chatillon A, Ebran A, Gorbinet T, Laurent B, Martin JF, Taieb J, Audouin L, Tassan-Got L, Jurado B, Álvarez-Pol H, Ayyad Y, Benlliure J, Caamaño M, Cortina-Gil D, Fernández-Domínguez B, Paradela C, Rodríguez-Sánchez J, Vargas J, Casarejos E, Heinz A, Kelić-Heil A, Kurz N, Nociforo C, Pietri S, Prochazka A, Rossi D, Schmidt KH, Simon H, Voss B, Weick H, Winfield J. SOFIA: An innovative setup to measure complete isotopic yield of fission fragments. EPJ WEB OF CONFERENCES 2013. [DOI: 10.1051/epjconf/20136206005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rodríguez-Sánchez J, Benlliure J, Taieb J, Álvarez-Pol H, Audouin L, Ayyad Y, Bélier G, Boutoux G, Casarejos E, Chatillon A, Cortina-Gil D, Gorbinet T, Heinz A, Kelić-Heil A, Kurz N, Laurent B, Martin JF, Paradela C, Pellereau E, Pietras B, Prochazka A, Ramos D, Rodríguez-Tajes C, Rossi D, Simon H, Tassan-Got L, Vargas J, Voss B. Fission of highly excited nuclei investigated in complete kinematic measurements. EPJ WEB OF CONFERENCES 2013. [DOI: 10.1051/epjconf/20136207009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bleiziffer S, Krane M, Deutsch MA, Elhmidi Y, Piazza N, Voss B, Lange R. Which way in? The necessity of multiple approaches to transcatheter valve therapy. Curr Cardiol Rev 2013; 9:268-73. [PMID: 24313647 PMCID: PMC3941089 DOI: 10.2174/1573403x09666131202123326] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 08/27/2012] [Accepted: 09/14/2012] [Indexed: 11/22/2022] Open
Abstract
TAVI (transcatheter aortic valve implantation) is a less invasive treatment of the stenotic aortic valve while avoiding midline sternotomy and cardiopulmonary bypass. A crimped biological valve on a self-expanding or balloonexpandable stent is inserted antegradely or retrogradely under fluoroscopy, and deployed on the beating heart. Among the worldwide TAVI programs, many different concepts have been established for the choice of the access site. Whether retrograde or antegrade TAVI should be considered the superior approach is matter of an ongoing debate. The published literature demonstrates safety of all techniques if performed within a dedicated multidisciplinary team. Since there is no data providing evidence if one approach is superior to another, we conclude that an individualized patient-centered decision making process is most beneficial, taking advantage of the complementarity of the different access options. The aim of this article is to give an overview of the current practice of access techniques for transcatheter based valve treatment and to outline the respective special characteristics.
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Badiu CC, Deutsch M, Sideris C, Krane M, Hettich I, Voss B, Mazzitelli D, Lange R. 224 * AORTIC ROOT REPLACEMENT: COMPARISON OF CLINICAL OUTCOME BETWEEN DIFFERENT SURGICAL TECHNIQUES. Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivt372.224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Rinaldi I, Brons S, Gordon J, Panse R, Voss B, Jäkel O, Parodi K. Experimental characterization of a prototype detector system for carbon ion radiography and tomography. Phys Med Biol 2013. [PMID: 23296259 DOI: 10.1088/0031‐9155/58/3/413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Ion beams exhibit a finite range and an inverted depth-dose profile, the Bragg peak. These favorable physical properties allow excellent tumor-dose conformality. However, they introduce sensitivity to range uncertainties. Although these uncertainties are typically taken into account in treatment planning, delivery of the intended dose to the patient has to be ensured daily to prevent underdosage of the tumor or overdosage of surrounding critical structures. Thus, imaging techniques play an increasingly important role for treatment planning and in situ monitoring in ion beam therapy. At the Heidelberg Ion Beam Therapy (HIT) center, a prototype detector system based on a stack of 61 ionization chambers has been assembled for the purpose of radiographic and tomographic imaging of transmitted energetic ions. Its applicability to ion-based transmission imaging was investigated experimentally. An extensive characterization of the set-up in terms of beam parameters and settings of the read-out electronics was performed. Overall, the findings of this work support the potential of an efficient experimental set-up as the range telescope equipped with high sensitivity and fast electronics to perform heavy ion radiography and tomography at HIT.
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Elhmidi Y, Bleiziffer S, Piazza N, Voss B, Schreiber C, Lange R. Sex-related differences in patients undergoing isolated surgical aortic valve replacement for severe aortic stenosis. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Badiu CC, Mazzitelli D, Özturk Ö, Nöbauer C, Krane M, Deutsch MA, Voss B, Lange R. De-novo construction of the aortic valve using glutaraldehyde-treated autologous pericardium: An old concept revived. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Rinaldi I, Brons S, Gordon J, Panse R, Voss B, Jäkel O, Parodi K. Experimental characterization of a prototype detector system for carbon ion radiography and tomography. Phys Med Biol 2013; 58:413-27. [DOI: 10.1088/0031-9155/58/3/413] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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46
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Boutoux G, Bélier G, Chatillon A, Ebran A, Gorbinet T, Laurent B, Martin JF, Pellereau E, Taieb J, Audouin L, Tassan-Got L, Jurado B, Álvarez-Pol H, Ayyad Y, Benlliure J, Caamaño M, Cortina-Gil D, Fernández-Domínguez B, Paradela C, Rodriguez-Sanchez JL, Vargas J, Casarejos E, Heinz A, Kelić-Heil A, Kurz N, Nociforo C, Pietri S, Prochazka A, Rossi D, Schmidt KH, Simon H, Voss B, Weick H, Winfield J. The SOFIA Experiment. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.phpro.2013.06.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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47
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Günzinger R, Günther T, Nöbauer C, Minkner K, Hettich I, Opitz A, Voss B, Lange R. Mitral valve repair with the Medtronic Profile 3D® annuloplasty ring – a single center experience. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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48
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Krane M, Deutsch MA, Schneider L, Voss B, Lange R. Prospective assessment of quality of life in octogenarians undergoing cardiac surgery. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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49
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Krane M, Dummler S, Eichhorn S, Tesche C, Schreiber U, Voss B, Deutsch MA, Lahm H, Lange R. Increased MMP-2 expression in human saphenous vein grafts perfused under controlled pressure conditions in an ex vivo perfusion system. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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50
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Badiu CC, Mazzitelli D, Voss B, Hörer J, Cleuziou J, Vogt M, Lange R, Schreiber C. Is aortic valve-sparing root replacement effective in pediatric patients with aortic root aneurysm? Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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