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Hulsart-Billström G, Dawson JI, Hofmann S, Müller R, Stoddart MJ, Alini M, Redl H, El Haj A, Brown R, Salih V, Hilborn J, Larsson S, Oreffo RO, Oreffo ROC. A surprisingly poor correlation between in vitro and in vivo testing of biomaterials for bone regeneration: results of a multicentre analysis. Eur Cell Mater 2016; 31:312-22. [PMID: 27215739 DOI: 10.22203/ecm.v031a20] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
New regenerative materials and approaches need to be assessed through reliable and comparable methods for rapid translation to the clinic. There is a considerable need for proven in vitro assays that are able to reduce the burden on animal testing, by allowing assessment of biomaterial utility predictive of the results currently obtained through in vivo studies. The purpose of this multicentre review was to investigate the correlation between existing in vitro results with in vivo outcomes observed for a range of biomaterials. Members from the European consortium BioDesign, comprising 8 universities in a European multicentre study, provided data from 36 in vivo studies and 47 in vitro assays testing 93 different biomaterials. The outcomes of the in vitro and in vivo experiments were scored according to commonly recognised measures of success relevant to each experiment. The correlation of in vitro with in vivo scores for each assay alone and in combination was assessed. A surprisingly poor correlation between in vitro and in vivo assessments of biomaterials was revealed indicating a clear need for further development of relevant in vitro assays. There was no significant overall correlation between in vitro and in vivo outcome. The mean in vitro scores revealed a trend of covariance to in vivo score with 58 %. The inadequacies of the current in vitro assessments highlighted here further stress the need for the development of novel approaches to in vitro biomaterial testing and validated pre-clinical pipelines.
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Velasco-Vélez JJ, Pfeifer V, Hävecker M, Wang R, Centeno A, Zurutuza A, Algara-Siller G, Stotz E, Skorupska K, Teschner D, Kube P, Braeuninger-Weimer P, Hofmann S, Schlögl R, Knop-Gericke A. Atmospheric pressure X-ray photoelectron spectroscopy apparatus: Bridging the pressure gap. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:053121. [PMID: 27250406 DOI: 10.1063/1.4951724] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
One of the main goals in catalysis is the characterization of solid/gas interfaces in a reaction environment. The electronic structure and chemical composition of surfaces become heavily influenced by the surrounding environment. However, the lack of surface sensitive techniques that are able to monitor these modifications under high pressure conditions hinders the understanding of such processes. This limitation is known throughout the community as the "pressure gap." We have developed a novel experimental setup that provides chemical information on a molecular level under atmospheric pressure and in presence of reactive gases and at elevated temperatures. This approach is based on separating the vacuum environment from the high-pressure environment by a silicon nitride grid-that contains an array of micrometer-sized holes-coated with a bilayer of graphene. Using this configuration, we have investigated the local electronic structure of catalysts by means of photoelectron spectroscopy and in presence of gases at 1 atm. The reaction products were monitored online by mass spectrometry and gas chromatography. The successful operation of this setup was demonstrated with three different examples: the oxidation/reduction reaction of iridium (noble metal) and copper (transition metal) nanoparticles and with the hydrogenation of propyne on Pd black catalyst (powder).
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Schwameis R, Sturdza A, Hofmann S, Grimm C, Reinthaller A, Polterauer S. Bevacizumab führt zu einer erhöhten Rate an Fistelbildungen bei Patientinnen mit rezidiviertem Zervixkarzinom. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1582213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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54
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Zhang X, Hofmann S, Rack B, Harbeck N, Jeschke U, Doisneau-Sixou S. Triple fluorescence analysis of vitamin D receptor status of circulating tumor cells (CTC) in breast cancer: from cell models to metastatic patients. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1580682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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55
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Schwameis R, Sturdza A, Hofmann S, Grimm C, Reinthaller A, Polterauer S. Bevacizumab führt zu einer erhöhten Rate an Fistelbildungen bei Patientinnen mit rezidiviertem Zervixkarzinom. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1579610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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56
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Boulard C, Duvert Lehembre S, Picard‐Dahan C, Kern J, Zambruno G, Feliciani C, Marinovic B, Vabres P, Borradori L, Prost‐Squarcioni C, Labeille B, Richard M, Ingen‐Housz‐Oro S, Houivet E, Werth V, Murrell D, Hertl M, Benichou J, Joly P, Hofmann S, Camaioni B, Didona B, Fania L, Della Torre R, Caux F, Alexandre M, Paul C, Bulai Livideanu C, Delaporte E, Dupuy A, Avenel‐Audran M, Schmidt E, Schumacher N, Bagot M, Tancrede‐Bohin E, Bouaziz J, D'Incan M, Quereux G, Skowron F, Beylot‐Barry M, Doutre M, Bedane C, Bernard P, Machet L, Jullien ., Debarbieux S, Dereure O, Hünefeld C, Schanz S, Franck N, Maillard H, Misery L, Sassolas B, Abasq C, Bouyeure A, Lagoutte P, Ferranti V. Calculation of cut‐off values based on the Autoimmune Bullous Skin Disorder Intensity Score (
ABSIS
) and Pemphigus Disease Area Index (
PDAI
) pemphigus scoring systems for defining moderate, significant and extensive types of pemphigus. Br J Dermatol 2016; 175:142-9. [DOI: 10.1111/bjd.14405] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/14/2016] [Indexed: 11/27/2022]
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57
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Bohl S, von Harsdorf S, Mulaw M, Hofmann S, Babiak A, Maier CP, Schnell J, Hütter-Krönke LM, Scholl K, Wais V, Schlenk RF, Bullinger L, Ringhoffer M, Döhner H, Bunjes D, Bommer M, Kuchenbauer F. Strong impact of extramedullary involvement in high-risk AML patients with active disease receiving the FLAMSA conditioning regimen for HSCT. Bone Marrow Transplant 2016; 51:994-6. [PMID: 26950380 PMCID: PMC4935978 DOI: 10.1038/bmt.2016.4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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58
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Wendt D, Schroefel H, Hofmann S, Heimeshoff M, Diegeler A, Holzhey D, Bramlage P, Strauch J. EASE-IT: Balloon Expandable Transcatheter Aortic Valve Implantation without Predilation of the Aortic Valve. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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59
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Hebert V, Boulard C, Houivet E, Duvert Lehembre S, Borradori L, Della Torre R, Feliciani C, Fania L, Zambruno G, Camaioni D, Didona B, Marinovic B, Schmidt E, Schumacher N, Hünefeld C, Schanz S, Johannes Steffen Kern J, Hofmann S, Bouyeure A, Picard-Dahan C, Prost-Squarcioni C, Caux F, Alexandre M, Ingen-Housz-Oro S, Bagot M, Tancrede-Bohin E, Bouaziz J, Franck N, Vabres P, Labeille B, Aleth Richard M, Delaporte E, Dupuy A, D’Incan M, Quereux G, Skowron F, Paul C, Bulai Livideanu C, Beylot-Barry M, Doutre M, Avenel-Audran M, Bedane C, Bernard P, Machet L, Maillard H, Jullien D, Debarbieux S, Sassolas B, Misery L, Abasq C, Dereure O, Lagoutte P, Ferranti V, Werth V, Murrell D, Hertl M, Benichou J, Joly P. Reproductibilité inter-observateur des scores de sévérité du pemphigus ABSIS et PDAI. Ann Dermatol Venereol 2015. [DOI: 10.1016/j.annder.2015.10.047] [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]
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60
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Houivet E, Hebert V, Boulard C, Vaillant M, Duvert Lehembre S, Borradori L, Della Torre R, Feliciani C, Fania L, Zambruno G, Camaioni D, Didona B, Marinovic B, Schmidt E, Schumacher N, Hünefeld C, Schanz S, Johannes Steffen Kern J, Hofmann S, Bouyeure A, Picard-Dahan C, Prost-Squarcioni C, Caux F, Alexandre M, Ingen-Housz-Oro S, Bagot M, Tancrede-Bohin E, Bouaziz J, Franck N, Vabres P, Labeille B, Aleth Richard M, Delaporte E, Dupuy A, D’Incan M, Quereux G, Skowron F, Paul C, Bulai Livideanu C, Beylot-Barry M, Doutre M, Avenel-Audran M, Bedane C, Bernard P, Machet L, Maillard H, Jullien D, Debarbieux S, Sassolas B, Misery L, Abasq C, Dereure O, Lagoutte P, Ferranti V, Werth V, Murrell D, Hertl M, Benichou J, Joly P. Corrélation entre les scores de sévérité clinique (ABSIS, PDAI, PGA), la qualité de vie (DLQI) et les taux d’Ac anti-desmogléine 1 et 3 dans le suivi du pemphigus. Ann Dermatol Venereol 2015. [DOI: 10.1016/j.annder.2015.10.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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61
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Hofmann S, Kubasch A, Rösen-Wolff A, Girschick H, Morbach H, Hedrich C. Altered expression of IL-10 family cytokines in CRMO result in enhanced inflammasome activation. Pediatr Rheumatol Online J 2015. [PMCID: PMC4597083 DOI: 10.1186/1546-0096-13-s1-o28] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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62
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Martino GD, Michaelis FB, Salmon AR, Hofmann S, Baumberg JJ. Controlling Nanowire Growth by Light. NANO LETTERS 2015; 15:7452-7457. [PMID: 26501872 DOI: 10.1021/acs.nanolett.5b02953] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Individual Au catalyst nanoparticles are used for selective laser-induced chemical vapor deposition of single germanium nanowires. Dark-field scattering reveals in real time the optical signatures of all key constituent growth processes. Growth is initially triggered by plasmonic absorption in the Au catalyst, while once nucleated the growing Ge nanowire supports magnetic and electric resonances that then dominate the laser interactions. This spectroscopic understanding allows real-time laser feedback that is crucial toward realizing the full potential of controlling nanomaterial growth by light.
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Hofmann S, Bure I, Agaimy A, Hartmann A, Haller F, Moskalev E. P152. EJC Suppl 2015. [DOI: 10.1016/j.ejcsup.2015.08.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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64
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Qasim MM, Khan AA, Kostanyan A, Kidambi PR, Cabrero-Vilatela A, Braeuninger-Weimer P, Gardiner DJ, Hofmann S, Wilkinson TD. Hybrid graphene nematic liquid crystal light scattering device. NANOSCALE 2015; 7:14114-14120. [PMID: 26243047 DOI: 10.1039/c5nr04094a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A hybrid graphene nematic liquid crystal (LC) light scattering device is presented. This device exploits the inherent poly-crystallinity of chemical vapour deposited (CVD) graphene films to induce directional anchoring and formation of LC multi-domains. This thereby enables efficient light scattering without the need for crossed polarisers or separate alignment layers/additives. The hybrid LC device exhibits switching thresholds at very low electric fields (< 1 V μm(-1)) and repeatable, hysteresis free characteristics. This exploitation of LC alignment effects on CVD graphene films enables a new generation of highly efficient nematic LC scattering displays as well as many other possible applications.
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65
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Panciera F, Chou YC, Reuter M, Zakharov D, Stach E, Hofmann S, Ross F. Synthesis of nanostructures in nanowires using sequential catalyst reactions. NATURE MATERIALS 2015; 14:820-5. [PMID: 26168344 PMCID: PMC5027917 DOI: 10.1038/nmat4352] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 06/12/2015] [Indexed: 05/04/2023]
Abstract
Nanowire growth by the vapour-liquid-solid (VLS) process enables a high level of control over nanowire composition, diameter, growth direction, branching and kinking, periodic twinning, and crystal structure. The tremendous impact of VLS-grown nanowires is due to this structural versatility, generating applications ranging from solid-state lighting and single-photon sources to thermoelectric devices. Here, we show that the morphology of these nanostructures can be further tailored by using the liquid droplets that catalyse nanowire growth as a 'mixing bowl', in which growth materials are sequentially supplied to nucleate new phases. Growing within the liquid, these phases adopt the shape of faceted nanocrystals that are then incorporated into the nanowires by further growth. We demonstrate this concept by epitaxially incorporating metal-silicide nanocrystals into Si nanowires with defect-free interfaces, and discuss how this process can be generalized to create complex nanowire-based heterostructures.
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66
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Vattai A, Ziegelmüller B, Kost B, Kuhn C, Hofmann S, Bayer B, Anslinger K, Jeschke U, Ditsch N. Die Expression des Thyroid Hormon Rezeptors (THR) in Ersttrimester Plazenten sowie in Trophoblasttumor Zellen wird durch den Progesteron Rezeptor reguliert. Geburtshilfe Frauenheilkd 2015. [DOI: 10.1055/s-0035-1555040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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67
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Welbergen L, Knabl J, Hutter S, Hüttenbrenner R, Hofmann S, Kuhn C, Kainer F, Jeschke U. Diabetes und geschlechtsspezifische Expressionsveränderungen der plazentaren Thyroid Hormon Rezeptoren. Geburtshilfe Frauenheilkd 2015. [DOI: 10.1055/s-0035-1555051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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68
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Zhang X, Hofmann S, Rack B, Harbeck N, Jeschke U, Doisneau-Sixou S. Characterization of Vitamin D Receptor Expression in Breast Cancer Cells Lines. Geburtshilfe Frauenheilkd 2015. [DOI: 10.1055/s-0035-1555090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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69
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Lapczyna H, Galea L, Wüst S, Bohner M, Jerban S, Sweedy A, Doebelin N, van Garderen N, Hofmann S, Baroud G, Müller R, von Rechenberg B, von Rechenberg B. Effect of grain size and microporosity on the in vivo behaviour of β-tricalcium phosphate scaffolds. Eur Cell Mater 2014; 28:299-319. [PMID: 25340808 DOI: 10.22203/ecm.v028a21] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Defining the most adequate architecture of a bone substitute scaffold is a topic that has received much attention over the last 40 years. However, contradictory results exist on the effect of grain size and microporosity. Therefore, the aim of this study was to determine the effect of these two factors on the in vivo behaviour of β-tricalcium phosphate (β-TCP) scaffolds. For that purpose, β-TCP scaffolds were produced with roughly the same macropore size (≈ 150 μm), and porosity (≈ 80 %), but two levels of microporosity (low: 10 % / high: ≈ 25 %) and grain size (small: 1.3 μm /large: ≈ 3.3 μm). The sample architecture was characterised extensively using materialography, Hg porosimetry, micro-computed tomography (μCT), and nitrogen adsorption. The scaffolds were implanted for 2, 4 and 8 weeks in a cylindrical 5-wall cancellous bone defect in sheep. The histological, histomorphometrical and μCT analysis of the samples revealed that all four scaffold types were almost completely resorbed within 8 weeks and replaced by new bone. Despite the three-fold difference in microporosity and grain size, very few biological differences were observed. The only significant effect at p < 0.01 was a slightly faster resorption rate and soft tissue formation between 4 and 8 weeks of implantation when microporosity was increased. Past and present results suggest that the biological response of this particular defect is not very sensitive towards physico-chemical differences of resorbable bone graft substitutes. As bone formed not only in the macropores but also in the micropores, a closer study at the microscopic and localised effects is necessary.
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70
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Wolf V, Jeschke U, Pestka A, Schönfeldt VV, Kuhn C, Hofmann S, Friese K. Der membranständige Prostaglandin-Rezeptor EP3 ist ein positiver Prognostikator für Metastasierung und Überleben beim Mamma-Karzinom. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1388332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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71
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Sabeth Pestka A, Knabl J, Toth B, Hüttenbrenner R, Kuhn C, Hofmann S, Wiest I, Jeschke U, Friese K. Regulation von RXRα, LXR und PPARγ in glandulären Epithelzellen der Dezidua in Aborten. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1387988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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72
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Knabl J, Hüttenbrenner R, Hutter S, Kirn V, Riedel C, Hofmann S, Kuhn C, Kainer F, Friese K, Jeschke U. Ist die Hochregulation der placentaren Estrogenrezeptoren α im Gestationsdiabetes Folge einer epigenetischen Regulation? Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1388060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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73
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Wiest I, Kuhn C, Hofmann S, Schulze S, Heublein S, Friese K, Dian D, Jeschke U. Der MUC1 spezifische humanisierte Antikörper PankoMab-GEX™ beeinflusst die Phosphorylierung von ErbB2 und ErbB4 in vitro. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1388474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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74
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Leino M, Uusitalo J, Allatt RG, Armbruster P, Enqvist T, Eskola K, Hofmann S, Hurskanen S, Jokinen A, Ninov V, Page RD, Trzaska WH. Alpha decay studies of neutron-deficient radium isotopes. ACTA ACUST UNITED AC 2014. [DOI: 10.1007/s002180050093] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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75
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Heßberger FP, Hofmann S, Ninov V, Armbruster P, Folger H, Münzenberg G, Schött HJ, Popeko AG, Yeremin AV, Andreyev AN, Saro S. Spontaneous fission and alpha-decay properties of neutron deficient isotopes 257−253104 and 258106. ACTA ACUST UNITED AC 2014. [DOI: 10.1007/s002180050422] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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