26
|
Müller R, Zhang S, Neumann B, Bäumer M, Vasenkov S. Study of Carbon Dioxide Transport in a Samaria Aerogel Catalyst by High Field Diffusion NMR. CHEM-ING-TECH 2013. [DOI: 10.1002/cite.201300041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
27
|
Brasch J, Mörig A, Neumann B, Proksch E. Expression of antimicrobial peptides and toll-like receptors is increased in tinea and pityriasis versicolor. Mycoses 2013; 57:147-52. [PMID: 23952012 DOI: 10.1111/myc.12118] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 07/18/2013] [Indexed: 12/22/2022]
Abstract
In superficial tinea and pityriasis versicolor, the causative fungi are for the most part confined to the stratum corneum which is barely reached by leukocytes. Therefore, a role of non-cellular components in the epidermal antifungal defence was suggested. To investigate the presence of such factors in these infections, the expression of human beta defensins 2 and 3 (hBD-2, hBD-3), RNase 7, psoriasin, toll-like receptors 2, 4 and 9 (TLR2, TLR4 and TLR9) and dectin 2 was analysed by use of immunostainings in skin biopsies. We found that hBD2, hBD3, psoriasin, RNase7, TLR2 and TLR4 were significantly more often expressed in distinct layers of lesional epidermis as compared with uninfected epidermis. In both infections but not in normal skin, hBD2 and hBD3 were commonly expressed within the stratum corneum and in the stratum granulosum. Similarly, psoriasin was seen more often in the upper skin layers of both infections as compared with normal skin. No significant differences between normal and infected skin were found for the expression of TLR9 and dectin 2. Our findings clearly show the expression of specific antimicrobial proteins and defence-related ligands in superficial tinea as well as in pityriasis versicolor, suggesting that these factors contribute to fungal containment.
Collapse
|
28
|
Botelho H, Dahimène S, Uliyakina I, Neumann B, Tischer C, Pepperkok R, Amaral M. WS20.6 High throughput screening as a source for novel cystic fibrosis therapeutic targets. J Cyst Fibros 2013. [DOI: 10.1016/s1569-1993(13)60128-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
29
|
Menezes WG, Neumann B, Zielasek V, Thiel K, Bäumer M. Bimetallic AuAg Nanoparticles: Enhancing the Catalytic Activity of Au for Reduction Reactions in the Liquid Phase by Addition of Ag. Chemphyschem 2013; 14:1577-81. [DOI: 10.1002/cphc.201201100] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Revised: 03/02/2013] [Indexed: 11/11/2022]
|
30
|
Wichmann A, Wittstock A, Frank K, Biener MM, Neumann B, Mädler L, Biener J, Rosenauer A, Bäumer M. Maximizing Activity and Stability by Turning Gold Catalysis Upside Down: Oxide Particles on Nanoporous Gold. ChemCatChem 2013. [DOI: 10.1002/cctc.201200759] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
31
|
Krüger T, Walker T, Nolte A, Secker S, Greiner TO, Neumann B, Wendel HP, Schlensak C. Veins under pressure: The relationship of arterial pressure to adhesion molecule expression and leukocyte adhesion in venous bypass grafts. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332460] [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]
|
32
|
Minnermann M, Neumann B, Zielasek V, Bäumer M. Alumina-promoted cobalt and iron xerogels as catalyst for the Fischer–Tropsch synthesis. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00483j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
33
|
Neumann B, Elkins TW, Dreher W, Hagelin-Weaver H, Nino JC, Bäumer M. Enhanced catalytic methane coupling using novel ceramic foams with bimodal porosity. Catal Sci Technol 2013. [DOI: 10.1039/c2cy20458d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
34
|
Bergmann U, Ahrends R, Neumann B, Scheler C, Linscheid MW. Application of Metal-Coded Affinity Tags (MeCAT): Absolute Protein Quantification with Top-Down and Bottom-Up Workflows by Metal-Coded Tagging. Anal Chem 2012; 84:5268-75. [DOI: 10.1021/ac203460b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
35
|
Krajewski S, Kurz J, Neumann B, Greiner TO, Stolz A, Balkau B, Peter K, Unertl K, Wendel HP, Straub A. Short-acting P2Y12 blockade to reduce platelet dysfunction and coagulopathy during experimental extracorporeal circulation and hypothermia. Br J Anaesth 2012; 108:912-21. [PMID: 22369765 DOI: 10.1093/bja/aer518] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Extracorporeal circulation (ECC) and hypothermia are routinely used in cardiac surgery to maintain stable circulatory parameters and to increase the ischaemic tolerance of the patient. However, ECC and hypothermia cause platelet activation and dysfunction possibly followed by a devastating coagulopathy. Stimulation of the adenosinediphosphate (ADP) receptor P(2)Y(12) plays a pivotal role in platelet activation. This experimental study tested P(2)Y(12) receptor blockade as an approach to protect platelets during ECC. METHODS Human blood was treated with the short-acting P(2)Y(12) blocker cangrelor (1 µM, t(1/2)<5 min) or the P(2)Y(12) inhibitor 2-MeSAMP (100 µM) and circulated in an ex vivo ECC model at normothermia (37°C) and hypothermia (28°C). Before and after circulation, markers of platelet activation and of coagulation (thrombin-antithrombin complex generation) were analysed. During hypothermic ECC in pigs, the effect of reversible P(2)Y(12) blockade on platelet function was evaluated by cangrelor infusion (0.075 µg kg(-1) min(-1)). RESULTS During ex vivo hypothermic ECC, P(2)Y(12) blockade inhibited platelet granule release (P<0.01), platelet-granulocyte binding (P<0.05), and platelet loss (P<0.001), whereas no effects on platelet-ECC binding, platelet CD42bα expression, glycoprotein IIb/IIIa activation, or thrombin-antithrombin complex generation were observed. During hypothermic ECC in pigs, cangrelor inhibited platelet-fibrinogen binding (P<0.05) and ADP-induced platelet aggregation (P<0.001). Platelet function was rapidly restored after termination of cangrelor infusion. CONCLUSIONS P(2)Y(12) blockade by cangrelor prevents platelet activation during ECC and hypothermia. Owing to its short half-life, platelet inhibition can be well controlled, thus potentially reducing bleeding complications. This novel pharmacological strategy has the potential to reduce complications associated with ECC and hypothermia.
Collapse
|
36
|
Lescan M, Kobba J, Avci-Adali M, Neumann B, Perle N, Wilhelm N, Wiedmaier H, Wendel HP, Schlensak C. An in vitro rotation model composed of disposables for investigation of endothelialization of artificial vascular prostheses. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297843] [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]
|
37
|
Moudry P, Lukas C, Macurek L, Neumann B, Heriche JK, Pepperkok R, Ellenberg J, Hodny Z, Lukas J, Bartek J. Nucleoporin NUP153 guards genome integrity by promoting nuclear import of 53BP1. Cell Death Differ 2011; 19:798-807. [PMID: 22075984 DOI: 10.1038/cdd.2011.150] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
53BP1 is a mediator of DNA damage response (DDR) and a tumor suppressor whose accumulation on damaged chromatin promotes DNA repair and enhances DDR signaling. Using foci formation of 53BP1 as a readout in two human cell lines, we performed an siRNA-based functional high-content microscopy screen for modulators of cellular response to ionizing radiation (IR). Here, we provide the complete results of this screen as an information resource, and validate and functionally characterize one of the identified 'hits': a nuclear pore component NUP153 as a novel factor specifically required for 53BP1 nuclear import. Using a range of cell and molecular biology approaches including live-cell imaging, we show that knockdown of NUP153 prevents 53BP1, but not several other DDR factors, from entering the nuclei in the newly forming daughter cells. This translates into decreased IR-induced 53BP1 focus formation, delayed DNA repair and impaired cell survival after IR. In addition, NUP153 depletion exacerbates DNA damage caused by replication stress. Finally, we show that the C-terminal part of NUP153 is required for effective 53BP1 nuclear import, and that 53BP1 is imported to the nucleus through the NUP153-importin-β interplay. Our data define the structure-function relationships within this emerging 53BP1-NUP153/importin-β pathway and implicate this mechanism in the maintenance of genome integrity.
Collapse
|
38
|
Nolte A, Secker S, Walker T, Greiner TO, Neumann B, Simon P, Ziemer G, Wendel HP. Veins are no arteries: even moderate arterial pressure induces significant adhesion molecule expression of vein grafts in an ex vivo circulation model. THE JOURNAL OF CARDIOVASCULAR SURGERY 2011; 52:251-259. [PMID: 21460776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM Coronary artery bypass grafting (CABG) is a standard procedure for treatment of coronary heart disease. Eighty percent of all CABGs are performed with venous grafts which then get exposed to an arterial pressure after surgery. This widely used procedure, however, is complicated by the development of alterations in the vein graft wall, leading to a decreased patency rate and graft failure. This study enlightens the influence of an even moderate arterial pressure on the gene expression of adhesion molecules in venous grafts which play a decisive role for the early induction of atherogenesis. METHODS Segments of porcine vena jugularis and arteria carotis were mounted in a simulated bypass circuit and subjected to pulsatile flow. Vessel segments were examined for adhesion molecule expression with quantitative real-time - polymerase chain reaction (qRT-PCR) and adherence of leukocytes was observed by confocal laser scanning microscopy and scanning electron microscopy. RESULTS Veins grafts subjected to an even moderate arterial pressure showed a 14-fold increase of ICAM-1 expression already after 4 hours. An arterial pressure of around 100/80 mmHg was enough to stimulate the adhesion molecule expression Furthermore it led to a 9-fold increase of leukocyte adhesion to the venous endothelium, but, in contrast this was not the case in arteries. CONCLUSION This study showed, that already 100 mmHg upregulates the expression of several adhesion molecules in pig veins followed by increased adhesion of leukocytes. Therefore, our data demonstrate the advantage of arteries for CABG, and that new therapeutic strategies are urgently necessary to protect vein grafts either physically or pharmacologically if arteries are not available for CABG.
Collapse
|
39
|
Neumann B, Pollmann P. Aggregation of Pseudoisocyanine Chloride in Aqueous Solutions at High Pressures. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19961000105] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
40
|
Weber L, Kahlert J, Stammler HG, Neumann B. Syntheses, Structure, Electrochemistry, and Optical Properties of 1,3-Diethyl-2,3-dihydro-1-H-1,3,2-pyrido-[4,5-b]-diazaboroles. Z Anorg Allg Chem 2008. [DOI: 10.1002/zaac.200800157] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
41
|
Neumann B, Steinhoff BJ. Die Carbamazepin-Enzephalopathie - eine seltene Nebenwirkung. AKTUELLE NEUROLOGIE 2008. [DOI: 10.1055/s-2007-1017981] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
42
|
Barton OG, Neumann B, Stammler HG, Mattay J. Intramolecular direct arylation in an A,C-functionalized calix[4]arene. Org Biomol Chem 2008; 6:104-11. [DOI: 10.1039/b713357j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
43
|
Weber L, Noveski G, Stammler HG, Neumann B. Synthese, Struktur und Reaktivität von η3-1,2-Diphosphaallylkomplexen sowie von [{(η5-C5H5)(CO)2W–Co(CO)3}{μ-AsCH(SiMe3)2}(μ-CO)]. Z Anorg Allg Chem 2008. [DOI: 10.1002/zaac.200700352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
44
|
Schäfer R, Wiskirchen J, Guo K, Neumann B, Kehlbach R, Pintaske J, Voth V, Walker T, Scheule AM, Greiner TO, Hermanutz-Klein U, Claussen CD, Northoff H, Ziemer G, Wendel HP. Aptamer-based isolation and subsequent imaging of mesenchymal stem cells in ischemic myocard by magnetic resonance imaging. ROFO-FORTSCHR RONTG 2007; 179:1009-15. [PMID: 17879173 DOI: 10.1055/s-2007-963409] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
PURPOSE Mesenchymal stem cells (MSC) seem to be a promising cell source for cellular cardiomyoplasty. We recently developed a new aptamer-based specific selection of MSC to provide "ready to transplant" cells directly after isolation. We evaluated MRI tracking of newly isolated and freshly transplanted MSC in the heart using one short ex vivo selection step combining specific aptamer-based isolation and labeling of the cells. MATERIALS AND METHODS Bone marrow (BM) was collected from healthy pigs. The animals were euthanized and the heart was placed in a perfusion model. During cold ischemia, immunomagnetic isolation of MSC from the BM by MSC-specific aptamers labeled with Dynabeads was performed within 2 h. For histological identification the cells were additionally stained with PKH26. Approx. 3 x 10(6) of the freshly aptamer-isolated cells were injected into the ramus interventricularis anterior (RIVA) and 5 x 10(5) cells were injected directly into myocardial tissue after damaging the respective area by freezing (cryo-scar). 3 x 10(6) of the aptamer-isolated cells were kept for further characterization (FACS and differentiation assays). 20 h after cell transplantation, MRI of the heart using a clinical 3.0 Tesla whole body scanner (Magnetom Trio, Siemens, Germany) was performed followed by histological examinations. RESULTS The average yield of sorted cells from 120 ml BM was 7 x 10(6) cells. The cells were cultured and showed MSC-like properties. MRI showed reproducible artifacts within the RIVA-perfusion area and the cryo-scar with surprisingly excellent quality. The histological examination of the biopsies showed PKH26-positive cells within the areas which were positive in the MRI in contrast to the control biopsies. CONCLUSION Immunomagnetic separation of MSC by specific aptamers linked to magnetic particles is feasible, effective and combines a specific separation and labeling technique to a "one stop shop" strategy.
Collapse
|
45
|
Weber L, Noveski G, Stammler HG, Neumann B. Über den Phosphandiyl-Transfer von invers-polarisierten Phosphaalkenen R1P=C(NMe2)2 (R1 =tBu, Cy, Ph, H) auf Phospheniumkomplexe [(η5-C5H5)(CO)2M=P(R2)R3] (R2 = R3 = Ph; R2 =tBu, R3 = H; R2 = Ph, R3 = N(SiMe3)2). Z Anorg Allg Chem 2007. [DOI: 10.1002/zaac.200700034] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
46
|
Weber L, Penner A, Domke I, Stammler HG, Neumann B. Synthese, Struktur, Elektrochemie und optische Eigenschaften von alkinylfunktionalisierten 1,3,2-Diazaborolen und 1,3,2-Diazaborolidinen. Z Anorg Allg Chem 2007. [DOI: 10.1002/zaac.200600351] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
47
|
Scheule AM, Walker T, Munteanu C, Lescan M, Neumann B, Wendel HP, Ziemer G. Duration of reperfusion period after cardioplegic arrest – is more better? A piglet working heart study. Thorac Cardiovasc Surg 2007. [DOI: 10.1055/s-2007-967550] [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]
|
48
|
Tzvetkov NT, Neumann B, Stammler HG, Mattay J. Crystal structure of (7a'SR)-7a'-prop-2-ynyl-1',2',4',6',7',7a'- hexahydrospiro[1,3-dioxolan-2,5'-indene], C14H18O2. Z KRIST-NEW CRYST ST 2006. [DOI: 10.1524/ncrs.2006.0163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
49
|
Tzvetkov ΝT, Neumann B, Stammler HG, Mattay J. Crystal structure of (1aSR,3aRS,7aSR)-3a-but-2-ynyl-1a,2,3,3a,4,5-hexahydro-1H-cyclopropa[c]inden-6(7H)-one,C14H18O. Z KRIST-NEW CRYST ST 2006. [DOI: 10.1524/ncrs.2006.221.14.481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
50
|
Weber L, Krümberg J, Stammler HG, Neumann B. Neue Kupferkomplexe mit Phosphaalkenliganden. Molekülstruktur von [Cu{P(Mes*)C(NMe2)2}2]BF4 (Mes* = 2,4,6-tBu3C6H2). Z Anorg Allg Chem 2006. [DOI: 10.1002/zaac.200600015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|