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Le DD, Rochlitzer S, Heck S, Bals R, Braun A, Welte T, Dinh QT. Allergische Atemwegsentzündung induziert eine Zunahme von Dendritischen Zellen in den Atemwegsganglien der Maus. Pneumologie 2014. [DOI: 10.1055/s-0034-1367922] [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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Funck U, Le DD, Rochlitzer S, Heck S, Bals R, Braun A, Welte T, Dinh QT. Veränderung von MHC-II positiven Zellen der Atemwegsganglien bei chronischem Hausstaubmilben-Mausmodell und HRV1B Infektion. Pneumologie 2014. [DOI: 10.1055/s-0034-1367785] [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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Funck U, Le DD, Rochlitzer S, Heck S, Bals R, Braun A, Welte T, Dinh QT. Veränderung von MHC-II positiven Zellen der Atemwegganglien bei chronischem Hausstaubmilben-Mausmodell und HRV1B Infektion. Pneumologie 2014. [DOI: 10.1055/s-0033-1363097] [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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Dinh Q, Heck S, Le D, Bals R, Welte T. Pathophysiologie, Diagnostik und Therapie von chronischem Husten: Neuronale Reflexe und Antitussiva. Pneumologie 2013. [DOI: 10.1055/s-0032-1309694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Dinh Q, Heck S, Le D, Bals R, Welte T. Pathophysiologie, Diagnostik und Therapie von chronischem Husten: Neuronale Reflexe und Antitussiva. Pneumologie 2013; 67:327-34. [DOI: 10.1055/s-0033-1343151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ninck J, Heck S, Gick S, Koebke J, Pennig D, Dargel J. [Treatment of proximal humerus fractures: relative position of different locking plates to the axillary nerve]. Unfallchirurg 2012; 116:1000-5. [PMID: 22814611 DOI: 10.1007/s00113-012-2242-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
OBJECTIVES Placement of a proximal humerus locking plate through a percutaneous transdeltoid approach bears the advantages of a minimally invasive approach but may compromise the anterior branches of the axillary nerve. This anatomic study aimed to develop a risk profile for 6 types of modern proximal humerus locking plates as to their interference with the axillary nerve. MATERIALS AND METHODS In this study six different implants (Arthrex®, DePuy®, Königsee®, Smith & Nephew®, Stryker® and Synthes®) were placed on the intact proximal humerus of 33 embalmed cadaveric upper extremities and the relative positioning between the axillary nerve and the screw holes was determined. RESULTS All locking plates displayed an area of risk which concerned 3 out of 7 (Arthrex®), 4 out of 10 (DePuy®), 2 out of 9 (Königsee®), 3 out of 11 (Smith & Nephew®), 3 out of 11 (Stryker®) and 6 out of 12 (Synthes®) screw holes of the plate. CONCLUSIONS Using the anterolateral percutaneous deltoid splitting approach the relative position of the axillary nerve to the holes of a specific implant is of relevance for avoidance of iatrogenic lesions to the nerve.
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Hüsken SMC, Heck S. The ‘Fish Trader+’ model: reducing female fish traders’ vulnerability to HIV. AJAR-AFRICAN JOURNAL OF AIDS RESEARCH 2012; 11:17-26. [DOI: 10.2989/16085906.2012.671254] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Pennig D, Heck S, Möhring R. [External fixation with motion capacity and radius fractures. Methods and results]. Unfallchirurg 2011; 114:105-13. [PMID: 21286674 DOI: 10.1007/s00113-010-1928-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Both the radiocarpal and distal radioulnar joints are often affected in"distal radius fractures". The incidence of this injury increases markedly among women over the age of 40. Bearing in mind the wide variety of distal radius fractures, a fixation system should be used which permits trans- and extra-articular application and subsequent reduction by means of distraction, as well as wrist mobilization. It is important that both reduction and position of the carpal bones can be checked. The possibility of extra-articular (radioradial) fixation should always be considered. AO group A2 and A3 fractures with sufficiently large fragments are suitable for this procedure. In other cases, transarticular application is advised. Complementary measures are justified in the case where two or more cortices in AP and lateral X-rays are destroyed. Adequate implants are also used to stabilize the articular surface. Large bone defects should be filled with corticocancellous material.
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Heck S, Gick S, Dargel J, Pennig D. Die Behandlung der akuten Luxation und Luxationsfraktur des Ellenbogens. Unfallchirurg 2011; 114:114-22. [PMID: 21286673 DOI: 10.1007/s00113-010-1929-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dimitriadis K, Heck S, Schubert M, Klopstock T. [Retained reflexes, proprioception, SNAPs: still Friedreich's ataxia]. DER NERVENARZT 2010; 81:442-3. [PMID: 20396985 DOI: 10.1007/s00115-010-2946-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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Dimitriadis K, Heck S, Klopstock T. Erhaltene Reflexe, erhaltene Propriozeption, erhaltene SNAP: Trotzdem Friedreich-Ataxie. KLIN NEUROPHYSIOL 2009. [DOI: 10.1055/s-0029-1216155] [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]
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Heck S, Dimitriadis K, Klopstock T. Erhaltene Reflexe, erhaltene Propriozeption, erhaltene SNAP: trotzdem Friedreich-Ataxie. AKTUELLE NEUROLOGIE 2008. [DOI: 10.1055/s-0028-1086576] [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]
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Netter P, Heck S, Müller H. What Selection of Patients is Achieved by Requesting Informed Consent in Placebo Controlled Drug Trials? PHARMACOPSYCHIATRY 2008. [DOI: 10.1055/s-2007-1017261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Heck S, Rudolph G, von Livonius B, Holder G, Meier T, Klopstock T. Eine doppelblinde, randomisierte, Placebo-kontrollierte Studie zur Wirksamkeit, Sicherheit und Verträglichkeit von SNT-MC 17/idebenone in der Behandlung von Patienten mit Leberscher Hereditärer Optikus-Neuropathie. AKTUELLE NEUROLOGIE 2007. [DOI: 10.1055/s-2007-987791] [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]
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Korkola JE, Heck S, Olshen AB, Reuter VE, Bosl GJ, Houldsworth J, Chaganti RSK. In vivo differentiation and genomic evolution in adult male germ cell tumors. Genes Chromosomes Cancer 2007; 47:43-55. [DOI: 10.1002/gcc.20504] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Rom JKW, Heck S, Becker N, Sinn HP, Schneeweiß A, Sohn C, Lichter P. Expression des Estrogen-Related Receptor alpha (ERRα) in Mammakarzinomen und dessen Korrelation mit pS2 und AIB1. Geburtshilfe Frauenheilkd 2006. [DOI: 10.1055/s-2006-952811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Kissling E, Allison EH, Seeley JA, Russell S, Bachmann M, Musgrave SD, Heck S. Fisherfolk are among groups most at risk of HIV: cross-country analysis of prevalence and numbers infected. AIDS 2005; 19:1939-46. [PMID: 16260899 DOI: 10.1097/01.aids.0000191925.54679.94] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Garten L, Hüseman D, Stoltenburg- Didinger G, Heck S, Obladen M. Klinische, neurophysiologische und neuropathologische Befunde nach totaler Asphyxie bei einem Reifgeborenen – ein typisches Mischbild aus “typischen“ Schädigungsmustern? Z Geburtshilfe Neonatol 2005. [DOI: 10.1055/s-2005-871483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Noh U, Heck S, Giffhorn F, Kohring GW. Phototrophic transformation of phenol to 4-hydroxyphenylacetate by Rhodopseudomonas palustris. Appl Microbiol Biotechnol 2002; 58:830-5. [PMID: 12021805 DOI: 10.1007/s00253-002-0954-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2001] [Revised: 01/23/2002] [Accepted: 01/25/2002] [Indexed: 10/27/2022]
Abstract
Newly isolated and culture collection strains of Rhodopseudomonas palustris were able to transform phenol to 4-hydroxyphenylacetate under phototrophic conditions in the presence of acetate, malate, benzoate, or cinnamate as growth substrates. The reaction was examined with uniformly (14)C-labelled phenol and the product was identified by HPLC retention time, UV-scans, and (1)H- and (13)C-NMR analysis. The transformation reaction was detectable in cell-free extracts in the presence of NAD(+) and acetyl-CoA. For further degradation of 4-hydroxyphenylacetate by R. palustris, low partial pressures of oxygen were essential, presumably for aerobic aromatic ring fission reactions by mono- and di-oxygenases.
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Manthey D, Heck S, Engert S, Behl C. Estrogen induces a rapid secretion of amyloid beta precursor protein via the mitogen-activated protein kinase pathway. EUROPEAN JOURNAL OF BIOCHEMISTRY 2001; 268:4285-91. [PMID: 11488923 DOI: 10.1046/j.1432-1327.2001.02346.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The female sex hormone estrogen (17beta-estradiol; E2) may function as a neurohormone and has multiple neuromodulatory functions in the brain. Its potent neuroprotective activities can be dependent and independent of estrogen receptors (ERs). In addition, E2 influences the processing of the amyloid beta precursor protein (APP), one central step in the pathogenesis of Alzheimer's disease. Here, we show: (a) that physiological concentrations of E2 very rapidly cause an increased release of secreted nonamyloidogenic APP (sAPPalpha) in mouse hippocampal HT22 and human neuroblastoma SK-N-MC cells; and (b) that this effect is mediated through E2 via the phosphorylation of extracellular-regulated kinase 1 and 2 (ERK1/2), prominent members of the mitogen-activated protein kinase (MAPK) pathway. Furthermore, we show that the activation of MAPK-signaling pathway and the enhancement of the sAPP release is independent of ERs and could be induced by E2 to a similar extent in neuronal cells either lacking or overexpressing a functional ER.
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Behl C, Moosmann B, Manthey D, Heck S. The female sex hormone oestrogen as neuroprotectant: activities at various levels. NOVARTIS FOUNDATION SYMPOSIUM 2001; 230:221-34; discussion 234-8. [PMID: 10965511 DOI: 10.1002/0470870818.ch16] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The female sex hormone oestradiol (oestrogen) is a steroidal compound that binds to specific intracellular receptors which act as transcription factors. Oestrogen displays many of its effects by the classical mode of action through receptor binding, transactivation and binding to consensus oestrogen response elements on DNA. Although the primary role of oestrogen as an ovarian steroid was thought to be the regulation of sex differentiation and maturation, since oestrogen receptors are expressed in a variety of other tissues besides sex organs, oestrogen is believed to exert multiple activities in several target sites throughout the body, including the nervous system. In the brain oestrogens have multiple activities. Potential neuroprotective functions of oestrogens are being intensively studied and it is becoming increasingly clear that oestrogens are (1) neuroprotective hormones acting via oestrogen receptor-dependent pathways at the genomic level and (2) neuroprotective steroidal structures acting independently of the activation of specific oestrogen receptors. One striking activity of the molecule oestradiol is its intrinsic antioxidant activity which makes it a potential chemical shield for neurons. Nerve cells frequently encounter oxidative challenges during the normal physiology, but also under pathophysiological conditions. Oxidative stress has been implicated in a variety of neurodegenerative disorders including amyotrophic lateral sclerosis, Parkinson's disease and Alzheimer's disease. It is important to stress that the antioxidant neuroprotective activity of oestrogens is independent of oestrogen receptor activation, since oestrogen derivatives and aromatic alcohols that do not bind to oestrogen receptors share the same antioxidant neuroprotective activity. Although this effect of oestrogens can clearly be separated from oestrogen receptor binding, oestrogens may interact with intracellular signalling pathways, such as the mitogen activated protein kinase, cyclic AMP pathways, and with the activity of the redox-sensitive transcription factor NF-kappa B.
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Ugi I, Heck S. The multicomponent reactions and their libraries for natural and preparative chemistry. Comb Chem High Throughput Screen 2001; 4:1-34. [PMID: 11281825 DOI: 10.2174/1386207013331291] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
It was recently recognized that three different types of multi-component reactions (MCRs) exist. In preparative chemistry, the MCRs of type II form their products particularly efficiently. These reactions correspond to equilibria of educts and intermediate products, whose final products are formed practically irreversibly. In recent years, the four component reaction of the isocyanides (U-4CR) of type II and their unions with various reactions and MCRs have become an important industrial process for preparing products and their libraries. It has been demonstrated that all conceivable collections of U-4CR educts can be converted into the corresponding products. In the usual chemical reactions, only the substituents of the products can be varied, whereas the U-4CR and related reactions can also produce skeletally different types of products with diverse substituents. The preparative advantages of forming products by the one-pot MCRs and the great variety of the possible products are illustrated in this review.
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Laser H, Bongards C, Schüller J, Heck S, Johnsson N, Lehming N. A new screen for protein interactions reveals that the Saccharomyces cerevisiae high mobility group proteins Nhp6A/B are involved in the regulation of the GAL1 promoter. Proc Natl Acad Sci U S A 2000; 97:13732-7. [PMID: 11095729 PMCID: PMC17644 DOI: 10.1073/pnas.250400997] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The split-ubiquitin assay detects protein interactions in vivo. To identify proteins interacting with Gal4p and Tup1p, two transcriptional regulators, we converted the split-ubiquitin assay into a generally applicable screen for binding partners of specific proteins in vivo. A library of genomic Saccharomyces cerevisiae DNA fragments fused to the N-terminal half of ubiquitin was constructed and transformed into yeast strains carrying either Gal4p or Tup1p as a bait. Both proteins were C-terminally extended by the C-terminal half of ubiquitin followed by a modified Ura3p with an arginine in position 1, a destabilizing residue in the N-end rule pathway. The bait fusion protein alone is stable and enzymatically active. However, upon interaction with its prey, a native-like ubiquitin is reconstituted. RUra3p is then cleaved off by the ubiquitin-specific proteases and rapidly degraded by the N-end rule pathway. In both screens, Nhp6B was identified as a protein in close proximity to Gal4p as well as to Tup1p. Direct interaction between either protein and Nhp6B was confirmed by coprecipitation assays. Genetic analysis revealed that Nhp6B, a member of the HMG1 family of DNA-binding proteins, can influence transcriptional activation as well as repression at a specific locus in the chromosome of the yeast S. cerevisiae.
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Faust N, Varas F, Kelly LM, Heck S, Graf T. Insertion of enhanced green fluorescent protein into the lysozyme gene creates mice with green fluorescent granulocytes and macrophages. Blood 2000; 96:719-26. [PMID: 10887140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Pluripotent hematopoietic stem cells have been studied extensively, but the events that occur during their differentiation remain largely uncharted. To develop a system that allows the differentiation of cultured multipotent progenitors by time-lapse fluorescence microscopy, myelomonocytic cells were labeled with green fluorescent protein (GFP) in vivo. This was achieved by knocking the enhanced GFP (EGFP) gene into the murine lysozyme M (lys) locus and using a targeting vector, which contains a neomycin resistant (neo) gene flanked by LoxP sites and "splinked" ends, to increase the frequency of homologous recombination. Analysis of the blood and bone marrow of the lys-EGFP mice revealed that most myelomonocytic cells, especially mature neutrophil granulocytes, were fluorescence-positive, while cells from other lineages were not. Removal of the neo gene through breeding of the mice with the Cre-deleter strain led to an increased fluorescence intensity. Mice with an inactivation of both copies of the lys gene developed normally and were fertile. (Blood. 2000;96:719-726)
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Rojo-Niersbach E, Morley D, Heck S, Lehming N. A new method for the selection of protein interactions in mammalian cells. Biochem J 2000; 348 Pt 3:585-90. [PMID: 10839990 PMCID: PMC1221101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
In the present study we present a new method that allows for the selection of protein interactions in mammalian cells. We have used this system to verify two interactions previously characterized in vitro. (1) The interaction between human TATA-binding protein 1 and nuclear factor kappaB and (2) the association of Homo sapiens nuclear autoantigen SP100B with human heterochromatin protein 1alpha, a protein implicated in chromatin remodelling. We observe for the first time that these interactions also occur in vivo. One protein was fused to the N-terminal half of ubiquitin, while the interacting partner was fused to the C-terminal half of ubiquitin, that was itself linked to guanine phosphoryltransferase 2 (gpt2) modified to begin with an arginine residue. Upon interaction of both proteins, ubiquitin is reconstituted, and its association with the Rgpt2 reporter is subsequently cleaved off by ubiquitin-processing enzymes. The presence of arginine in the Rgpt2 gene product leads to the degradation of the product by the N-end rule pathway. In the human fibroblast cell line HT1080HPRT(-) (that is deficient in the enzyme for hypoxanthine-guanine phosphoribosyltransferase) cells in which interaction between both proteins of interest occurs can then be selected for by hypoxanthine/aminopterin/thymine medium and counterselected against by 6-thioguanine medium. This method provides a suitable alternative to the yeast two-hybrid system and is generally applicable.
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