@article{WalterGrussNeidlingeretal.2020, author = {Walter, Steffen and Gruss, Sascha and Neidlinger, Jana and Stross, Isabelle and Hann, Alexander and Wagner, Martin and Seufferlein, Thomas and Walter, Benjamin}, title = {Evaluation of an Objective Measurement Tool for Stress Level Reduction by Individually Chosen Music During Colonoscopy—Results From the Study "ColoRelaxTone"}, series = {Frontiers in Medicine}, volume = {7}, journal = {Frontiers in Medicine}, doi = {10.3389/fmed.2020.00525}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-212337}, year = {2020}, abstract = {Background and Aims: Colonoscopy as standard procedure in endoscopy is often perceived as uncomfortable for patients. Patient's anxiety is therefore a significant issue, which often lead to avoidance of participation of relevant examinations as CRC-screening. Non-pharmacological anxiety management interventions such as music might contribute to relaxation in the phase prior and during endoscopy. Although music's anxiolytic effects have been reported previously, no objective measurement of stress level reduction has been reported yet. Focus of this study was to evaluate the objective measurement of the state of relaxation in patients undergoing colonoscopy. Methods: Prospective study (n = 196) performed at one endoscopic high-volume center. Standard colonoscopy was performed in control group. Interventional group received additionally self-chosen music over earphones. Facial Electromyography (fEMG) activity was obtained. Clinician Satisfaction with Sedation Instrument (CSSI) and Patients Satisfaction with Sedation Instrument (PSSI) was answered by colonoscopists and patients, respectively. Overall satisfaction with music accompanied colonoscopy was obtained if applicable. Results: Mean difference measured by fEMG via musculus zygomaticus major indicated a significantly lower stress level in the music group [7.700(±5.560) μV vs. 4.820(±3.330) μV; p = 0.001]. Clinician satisfaction was significantly higher with patients listening to music [82.69(±15.04) vs. 87.3(±15.02) pts.; p = 0.001]. Patient's satisfaction was higher but did not differ significantly. Conclusions: We conclude that self-chosen music contributes objectively to a reduced stress level for patients and therefore subjectively perceived satisfaction for endoscopists. Therefore, music should be considered as a non-pharmacological treatment method of distress reduction especially in the beginning of endoscopic procedures.}, language = {en} } @article{BousquetAntoBachertetal.2021, author = {Bousquet, Jean and Anto, Josep M. and Bachert, Claus and Haahtela, Tari and Zuberbier, Torsten and Czarlewski, Wienczyslawa and Bedbrook, Anna and Bosnic-Anticevich, Sinthia and Walter Canonica, G. and Cardona, Victoria and Costa, Elisio and Cruz, Alvaro A. and Erhola, Marina and Fokkens, Wytske J. and Fonseca, Joao A. and Illario, Maddalena and Ivancevich, Juan-Carlos and Jutel, Marek and Klimek, Ludger and Kuna, Piotr and Kvedariene, Violeta and Le, LTT and Larenas-Linnemann, D{\´e}sir{\´e}e E. and Laune, Daniel and Louren{\c{c}}o, Olga M. and Mel{\´e}n, Erik and Mullol, Joaquim and Niedoszytko, Marek and Odemyr, Mika{\"e}la and Okamoto, Yoshitaka and Papadopoulos, Nikos G. and Patella, Vincenzo and Pfaar, Oliver and Pham-Thi, Nh{\^a}n and Rolland, Christine and Samolinski, Boleslaw and Sheikh, Aziz and Sofiev, Mikhail and Suppli Ulrik, Charlotte and Todo-Bom, Ana and Tomazic, Peter-Valentin and Toppila-Salmi, Sanna and Tsiligianni, Ioanna and Valiulis, Arunas and Valovirta, Erkka and Ventura, Maria-Teresa and Walker, Samantha and Williams, Sian and Yorgancioglu, Arzu and Agache, Ioana and Akdis, Cezmi A. and Almeida, Rute and Ansotegui, Ignacio J. and Annesi-Maesano, Isabella and Arnavielhe, Sylvie and Basaga{\~n}a, Xavier and D. Bateman, Eric and B{\´e}dard, Annabelle and Bedolla-Barajas, Martin and Becker, Sven and Bennoor, Kazi S. and Benveniste, Samuel and Bergmann, Karl C. and Bewick, Michael and Bialek, Slawomir and E. Billo, Nils and Bindslev-Jensen, Carsten and Bjermer, Leif and Blain, Hubert and Bonini, Matteo and Bonniaud, Philippe and Bosse, Isabelle and Bouchard, Jacques and Boulet, Louis-Philippe and Bourret, Rodolphe and Boussery, Koen and Braido, Fluvio and Briedis, Vitalis and Briggs, Andrew and Brightling, Christopher E. and Brozek, Jan and Brusselle, Guy and Brussino, Luisa and Buhl, Roland and Buonaiuto, Roland and Calderon, Moises A. and Camargos, Paulo and Camuzat, Thierry and Caraballo, Luis and Carriazo, Ana-Maria and Carr, Warner and Cartier, Christine and Casale, Thomas and Cecchi, Lorenzo and Cepeda Sarabia, Alfonso M. and H. Chavannes, Niels and Chkhartishvili, Ekaterine and Chu, Derek K. and Cingi, Cemal and Correia de Sousa, Jaime and Costa, David J. and Courbis, Anne-Lise and Custovic, Adnan and Cvetkosvki, Biljana and D'Amato, Gennaro and da Silva, Jane and Dantas, Carina and Dokic, Dejan and Dauvilliers, Yves and De Feo, Giulia and De Vries, Govert and Devillier, Philippe and Di Capua, Stefania and Dray, Gerard and Dubakiene, Ruta and Durham, Stephen R. and Dykewicz, Mark and Ebisawa, Motohiro and Gaga, Mina and El-Gamal, Yehia and Heffler, Enrico and Emuzyte, Regina and Farrell, John and Fauquert, Jean-Luc and Fiocchi, Alessandro and Fink-Wagner, Antje and Fontaine, Jean-Fran{\c{c}}ois and Fuentes Perez, Jos{\´e} M. and Gemicioğlu, Bilun and Gamkrelidze, Amiran and Garcia-Aymerich, Judith and Gevaert, Philippe and Gomez, Ren{\´e} Maximiliano and Gonz{\´a}lez Diaz, Sandra and Gotua, Maia and Guldemond, Nick A. and Guzm{\´a}n, Maria-Antonieta and Hajjam, Jawad and Huerta Villalobos, Yunuen R. and Humbert, Marc and Iaccarino, Guido and Ierodiakonou, Despo and Iinuma, Tomohisa and Jassem, Ewa and Joos, Guy and Jung, Ki-Suck and Kaidashev, Igor and Kalayci, Omer and Kardas, Przemyslaw and Keil, Thomas and Khaitov, Musa and Khaltaev, Nikolai and Kleine-Tebbe, Jorg and Kouznetsov, Rostislav and Kowalski, Marek L. and Kritikos, Vicky and Kull, Inger and La Grutta, Stefania and Leonardini, Lisa and Ljungberg, Henrik and Lieberman, Philip and Lipworth, Brian and Lodrup Carlsen, Karin C. and Lopes-Pereira, Catarina and Loureiro, Claudia C. and Louis, Renaud and Mair, Alpana and Mahboub, Bassam and Makris, Micha{\"e}l and Malva, Joao and Manning, Patrick and Marshall, Gailen D. and Masjedi, Mohamed R. and Maspero, Jorge F. and Carreiro-Martins, Pedro and Makela, Mika and Mathieu-Dupas, Eve and Maurer, Marcus and De Manuel Keenoy, Esteban and Melo-Gomes, Elisabete and Meltzer, Eli O. and Menditto, Enrica and Mercier, Jacques and Micheli, Yann and Miculinic, Neven and Mihaltan, Florin and Milenkovic, Branislava and Mitsias, Dimitirios I. and Moda, Giuliana and Mogica-Martinez, Maria-Dolores and Mohammad, Yousser and Montefort, Steve and Monti, Ricardo and Morais-Almeida, Mario and M{\"o}sges, Ralph and M{\"u}nter, Lars and Muraro, Antonella and Murray, Ruth and Naclerio, Robert and Napoli, Luigi and Namazova-Baranova, Leyla and Neffen, Hugo and Nekam, Kristoff and Neou, Angelo and Nordlund, Bj{\"o}rn and Novellino, Ettore and Nyembue, Dieudonn{\´e} and O'Hehir, Robyn and Ohta, Ken and Okubo, Kimi and Onorato, Gabrielle L. and Orlando, Valentina and Ouedraogo, Solange and Palamarchuk, Julia and Pali-Sch{\"o}ll, Isabella and Panzner, Peter and Park, Hae-Sim and Passalacqua, Gianni and P{\´e}pin, Jean-Louis and Paulino, Ema and Pawankar, Ruby and Phillips, Jim and Picard, Robert and Pinnock, Hilary and Plavec, Davor and Popov, Todor A. and Portejoie, Fabienne and Price, David and Prokopakis, Emmanuel P. and Psarros, Fotis and Pugin, Benoit and Puggioni, Francesca and Quinones-Delgado, Pablo and Raciborski, Filip and Rajabian-S{\"o}derlund, Rojin and Regateiro, Frederico S. and Reitsma, Sietze and Rivero-Yeverino, Daniela and Roberts, Graham and Roche, Nicolas and Rodriguez-Zagal, Erendira and Rolland, Christine and Roller-Wirnsberger, Regina E. and Rosario, Nelson and Romano, Antonino and Rottem, Menachem and Ryan, Dermot and Salim{\"a}ki, Johanna and Sanchez-Borges, Mario M. and Sastre, Joaquin and Scadding, Glenis K. and Scheire, Sophie and Schmid-Grendelmeier, Peter and Sch{\"u}nemann, Holger J. and Sarquis Serpa, Faradiba and Shamji, Mohamed and Sisul, Juan-Carlos and Sofiev, Mikhail and Sol{\´e}, Dirceu and Somekh, David and Sooronbaev, Talant and Sova, Milan and Spertini, Fran{\c{c}}ois and Spranger, Otto and Stellato, Cristiana and Stelmach, Rafael and Thibaudon, Michel and To, Teresa and Toumi, Mondher and Usmani, Omar and Valero, Antonio A. and Valenta, Rudolph and Valentin-Rostan, Marylin and Pereira, Marilyn Urrutia and van der Kleij, Rianne and Van Eerd, Michiel and Vandenplas, Olivier and Vasankari, Tuula and Vaz Carneiro, Antonio and Vezzani, Giorgio and Viart, Fr{\´e}d{\´e}ric and Viegi, Giovanni and Wallace, Dana and Wagenmann, Martin and Wang, De Yun and Waserman, Susan and Wickman, Magnus and Williams, Dennis M. and Wong, Gary and Wroczynski, Piotr and Yiallouros, Panayiotis K. and Yusuf, Osman M. and Zar, Heather J. and Zeng, St{\´e}phane and Zernotti, Mario E. and Zhang, Luo and Shan Zhong, Nan and Zidarn, Mihaela}, title = {ARIA digital anamorphosis: Digital transformation of health and care in airway diseases from research to practice}, series = {Allergy}, volume = {76}, journal = {Allergy}, number = {1}, doi = {10.1111/all.14422}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-228339}, pages = {168 -- 190}, year = {2021}, abstract = {Digital anamorphosis is used to define a distorted image of health and care that may be viewed correctly using digital tools and strategies. MASK digital anamorphosis represents the process used by MASK to develop the digital transformation of health and care in rhinitis. It strengthens the ARIA change management strategy in the prevention and management of airway disease. The MASK strategy is based on validated digital tools. Using the MASK digital tool and the CARAT online enhanced clinical framework, solutions for practical steps of digital enhancement of care are proposed.}, language = {en} } @article{SchmidSteinleinFeichtingeretal.2014, author = {Schmid, Michael and Steinlein, Claus and Feichtinger, Wolfgang and Haaf, Thomas and Mijares-Urrutia, Abraham and Schargel, Walter E. and Hedges, S. Blair}, title = {Cytogenetic Studies on Gonatodes (Reptilia, Squamata, Sphaerodactylidae)}, series = {Cytogenetic and Genome Research}, volume = {144}, journal = {Cytogenetic and Genome Research}, number = {1}, issn = {1424-8581}, doi = {10.1159/000367929}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-196753}, pages = {47-61}, year = {2014}, abstract = {Mitotic and meiotic chromosomes of 5 species of the reptile genus Gonatodes are described by means of conventional staining, banding analyses and in situ hybridization using a synthetic telomeric DNA probe. The amount, location and fluorochrome affinities of constitutive heterochromatin, the number and positions of nucleolus organizer regions, and the patterns of telomeric DNA sequences were determined for most of the species. The karyotypes of G. falconensis and G. taniae from northern Venezuela are distinguished by their extraordinarily reduced diploid chromosome number of 2n = 16, which is the lowest value found so far in reptiles. In contrast to most other reptiles, both species have exclusively large biarmed (meta- and submetacentric) chromosomes. Comparison of the karyotypes of G. falconensis and G. taniae with those of other Gonatodes species indicates that the exceptional 2n = 16 karyotype originated by a series of 8 centric fusions. The karyotypes of G. falconensis and G. taniae are further characterized by the presence of considerable amounts of (TTAGGG)n telomeric sequences in the centromeric regions of all chromosomes. These are probably not only relics of the centric fusion events, but a component of the highly repetitive DNA in the constitutive heterochromatin of the chromosomes. The genome sizes of 4 Gonatodes species were determined using flow cytometry. For comparative purposes, all previously published cytogenetic data on Gonatodes and other sphaerodactylids are included and discussed.}, language = {en} } @article{vonKriesWeissFalkenhorstetal.2011, author = {von Kries, R{\"u}diger and Weiss, Susanne and Falkenhorst, Gerhard and Wirth, Stephan and Kaiser, Petra and Huppertz, Hans-Iko and Tenenbaum, Tobias and Schroten, Horst and Streng, Andrea and Liese, Johannes and Shai, Sonu and Niehues, Tim and Girschick, Hermann and Kuscher, Ellen and Sauerbrey, Axel and Peters, Jochen and Wirsing von Koenig, Carl Heinz and R{\"u}ckinger, Simon and Hampl, Walter and Michel, Detlef and Mertens, Thomas}, title = {Post-Pandemic Seroprevalence of Pandemic Influenza A (H1N1) 2009 Infection (Swine Flu) among Children < 18 Years in Germany}, series = {PLoS ONE}, volume = {6}, journal = {PLoS ONE}, number = {9}, doi = {10.1371/journal.pone.0023955}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-141698}, pages = {e23955}, year = {2011}, abstract = {Background: We determined antibodies to the pandemic influenza A (H1N1) 2009 virus in children to assess: the incidence of (H1N1) 2009 infections in the 2009/2010 season in Germany, the proportion of subclinical infections and to compare titers in vaccinated and infected children. Methodology/Principal Findings: Eight pediatric hospitals distributed over Germany prospectively provided sera from in-or outpatients aged 1 to 17 years from April 1(st) to July 31(st) 2010. Vaccination history, recall of infections and sociodemographic factors were ascertained. Antibody titers were measured with a sensitive and specific in-house hemagglutination inhibition test (HIT) and compared to age-matched sera collected during 6 months before the onset of the pandemic in Germany. We analyzed 1420 post-pandemic and 300 pre-pandemic sera. Among unvaccinated children aged 1-4 and 5-17 years the prevalence of HI titers (>= 1:10) was 27.1\% (95\% CI: 23.5-31.3) and 53.5\% (95\% CI: 50.9-56.2) compared to 1.7\% and 5.5\%, respectively, for pre-pandemic sera, accounting for a serologically determined incidence of influenza A (H1N1) 2009 during the season 2009/2010 of 25,4\% (95\% CI : 19.3-30.5) in children aged 1-4 years and 48.0\% (95\% CI: 42.6-52.0) in 5-17 year old children. Of children with HI titers >= 1: 10, 25.5\% (95\% CI: 22.5-28.8) reported no history of any infectious disease since June 2009. Among vaccinated children, 92\% (95\%-CI: 87.0-96.6) of the 5-17 year old but only 47.8\% (95\%-CI: 33.5-66.5) of the 1-4 year old children exhibited HI titers against influenza A virus (H1N1) 2009. Conclusion: Serologically determined incidence of influenza A (H1N1) 2009 infections in children indicates high infection rates with older children (5-17 years) infected twice as often as younger children. In about a quarter of the children with HI titers after the season 2009/2010 subclinical infections must be assumed. Low HI titers in young children after vaccination with the AS03(B)-adjuvanted split virion vaccine need further scrutiny.}, language = {en} } @article{BinderMayBaronetal.2011, author = {Binder, Andreas and May, Denisa and Baron, Ralf and Maier, Christoph and T{\"o}lle, Thomas R. and Treede, Rolf-Detlef and Berthele, Achim and Faltraco, Frank and Flor, Herta and Gierthm{\"u}hlen, Janne and Haenisch, Sierk and Huge, Volker and Magerl, Walter and Maih{\"o}fner, Christian and Richter, Helmut and Rolke, Roman and Scherens, Andrea and {\"U}{\c{c}}eyler, Nurcan and Ufer, Mike and Wasner, Gunnar and Zhu, Jihong and Cascorbi, Ingolf}, title = {Transient Receptor Potential Channel Polymorphisms Are Associated with the Somatosensory Function in Neuropathic Pain Patients}, series = {PLoS ONE}, volume = {6}, journal = {PLoS ONE}, number = {3}, doi = {10.1371/journal.pone.0017387}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-142782}, pages = {e17387}, year = {2011}, abstract = {Transient receptor potential channels are important mediators of thermal and mechanical stimuli and play an important role in neuropathic pain. The contribution of hereditary variants in the genes of transient receptor potential channels to neuropathic pain is unknown. We investigated the frequency of transient receptor potential ankyrin 1, transient receptor potential melastin 8 and transient receptor potential vanilloid 1 single nucleotide polymorphisms and their impact on somatosensory abnormalities in neuropathic pain patients. Within the German Research Network on Neuropathic Pain (Deutscher Forscbungsverbund Neuropathischer Schmerz) 371 neuropathic pain patients were phenotypically characterized using standardized quantitative sensory testing. Pyrosequencing was employed to determine a total of eleven single nucleotide polymorphisms in transient receptor potential channel genes of the neuropathic pain patients and a cohort of 253 German healthy volunteers. Associations of quantitative sensory testing parameters and single nucleotide polymorphisms between and within groups and subgroups, based on sensory phenotypes, were analyzed. Single nucleotide polymorphisms frequencies did not differ between both the cohorts. However, in neuropathic pain patients transient receptor potential ankyrin 1 710G>A (rs920829, E179K) was associated with the presence of paradoxical heat sensation (p=0.03), and transient receptor potential vanilloid 1 1911A>G (rs8065080, I585V) with cold hypoalgesia (p=0.0035). Two main subgroups characterized by preserved (1) and impaired (2) sensory function were identified. In subgroup 1 transient receptor potential vanilloid 1 1911A>G led to significantly less heat hyperalgesia, pinprick hyperalgesia and mechanical hypaesthesia (p=0.006, p=0.005 and p<0.001) and transient receptor potential vanilloid 1 1103C>G (rs222747, M315I) to cold hypaesthesia (p=0.002), but there was absence of associations in subgroup 2. In this study we found no evidence that genetic variants of transient receptor potential channels are involved in the expression of neuropathic pain, but transient receptor potential channel polymorphisms contributed significantly to the somatosensory abnormalities of neuropathic pain patients.}, language = {en} } @article{SeherNickelMuelleretal.2011, author = {Seher, Axel and Nickel, Joachim and Mueller, Thomas D. and Kneitz, Susanne and Gebhardt, Susanne and Meyer ter Vehn, Tobias and Schlunck, Guenther and Sebald, Walter}, title = {Gene expression profiling of connective tissue growth factor (CTGF) stimulated primary human tenon fibroblasts reveals an inflammatory and wound healing response in vitro}, series = {Molecular Vision}, volume = {17}, journal = {Molecular Vision}, number = {08. Okt}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-140189}, pages = {53-62}, year = {2011}, abstract = {Purpose: The biologic relevance of human connective tissue growth factor (hCTGF) for primary human tenon fibroblasts (HTFs) was investigated by RNA expression profiling using affymetrix (TM) oligonucleotide array technology to identify genes that are regulated by hCTGF. Methods: Recombinant hCTGF was expressed in HEK293T cells and purified by affinity and gel chromatography. Specificity and biologic activity of hCTGF was confirmed by biosensor interaction analysis and proliferation assays. For RNA expression profiling HTFs were stimulated with hCTGF for 48h and analyzed using affymetrix (TM) oligonucleotide array technology. Results were validated by real time RT-PCR. Results: hCTGF induces various groups of genes responsible for a wound healing and inflammatory response in HTFs. A new subset of CTGF inducible inflammatory genes was discovered (e.g., chemokine [C-X-C motif] ligand 1 [CXCL1], chemokine [C-X-C motif] ligand 6 [CXCL6], interleukin 6 [IL6], and interleukin 8 [IL8]). We also identified genes that can transmit the known biologic functions initiated by CTGF such as proliferation and extracellular matrix remodelling. Of special interest is a group of genes, e.g., osteoglycin (OGN) and osteomodulin (OMD), which are known to play a key role in osteoblast biology. Conclusions: This study specifies the important role of hCTGF for primary tenon fibroblast function. The RNA expression profile yields new insights into the relevance of hCTGF in influencing biologic processes like wound healing, inflammation, proliferation, and extracellular matrix remodelling in vitro via transcriptional regulation of specific genes. The results suggest that CTGF potentially acts as a modulating factor in inflammatory and wound healing response in fibroblasts of the human eye.}, language = {en} } @article{StrohmeierWalterRotheetal.2018, author = {Strohmeier, Michael and Walter, Thomas and Rothe, Julian and Montenegro, Sergio}, title = {Ultra-wideband based pose estimation for small unmanned aerial vehicles}, series = {IEEE Access}, volume = {6}, journal = {IEEE Access}, doi = {10.1109/ACCESS.2018.2873571}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-177503}, pages = {57526-57535}, year = {2018}, abstract = {This paper proposes a 3-D local pose estimation system for a small Unmanned Aerial Vehicle (UAV) with a weight limit of 200 g and a very small footprint of 10 cm×10cm. The system is realized by fusing 3-D position estimations from an Ultra-Wide Band (UWB) transceiver network with Inertial Measurement Unit (IMU) sensor data and data from a barometric pressure sensor. The 3-D position from the UWB network is estimated using Multi-Dimensional Scaling (MDS) and range measurements between the transceivers. The range measurements are obtained using Double-Sided Two-Way Ranging (DS-TWR), thus eliminating the need for an additional clock synchronization mechanism. The sensor fusion is accomplished using a loosely coupled Extended Kalman Filter (EKF) architecture. Extensive evaluation of the proposed system shows that a position accuracy with a Root-Mean-Square Error (RMSE) of 0.20cm can be obtained. The orientation angle can be estimated with an RMSE of 1.93°.}, language = {en} } @article{HarthKotzschHuetal.2010, author = {Harth, Stefan and Kotzsch, Alexander and Hu, Junli and Sebald, Walter and Mueller, Thomas D.}, title = {A Selection Fit Mechanism in BMP Receptor IA as a Possible Source for BMP Ligand-Receptor Promiscuity}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-68497}, year = {2010}, abstract = {Background: Members of the TGF-b superfamily are characterized by a highly promiscuous ligand-receptor interaction as is readily apparent from the numeral discrepancy of only seven type I and five type II receptors available for more than 40 ligands. Structural and functional studies have been used to address the question of how specific signals can be deduced from a limited number of receptor combinations and to unravel the molecular mechanisms underlying the protein-protein recognition that allow such limited specificity. Principal Findings: In this study we have investigated how an antigen binding antibody fragment (Fab) raised against the extracellular domain of the BMP receptor type IA (BMPR-IA) recognizes the receptor's BMP-2 binding epitope and thereby neutralizes BMP-2 receptor activation. The crystal structure of the complex of the BMPR-IA ectodomain bound to the Fab AbD1556 revealed that the contact surface of BMPR-IA overlaps extensively with the contact surface for BMP-2 interaction. Although the structural epitopes of BMPR-IA to both binding partners coincides, the structures of BMPR-IA in the two complexes differ significantly. In contrast to the structural differences, alanine-scanning mutagenesis of BMPR-IA showed that the functional determinants for binding to the antibody and BMP-2 are almost identical. Conclusions: Comparing the structures of BMPR-IA bound to BMP-2 or bound to the Fab AbD1556 with the structure of unbound BMPR-IA shows that binding of BMPR-IA to its interaction partners follows a selection fit mechanism, possibly indicating that the ligand promiscuity of BMPR-IA is inherently encoded by structural adaptability. The functional and structural analysis of the BMPR-IA binding antibody AbD1556 mimicking the BMP-2 binding epitope may thus pave the way for the design of low-molecular weight synthetic receptor binders/inhibitors.}, subject = {Physiologische Chemie}, language = {en} } @article{KlammertMuellerHellmannetal.2015, author = {Klammert, Uwe and M{\"u}ller, Thomas D. and Hellmann, Tina V. and Wuerzler, Kristian K. and Kotzsch, Alexander and Schliermann, Anna and Schmitz, Werner and Kuebler, Alexander C. and Sebald, Walter and Nickel, Joachim}, title = {GDF-5 can act as a context-dependent BMP-2 antagonist}, series = {BMC Biology}, volume = {13}, journal = {BMC Biology}, number = {77}, doi = {10.1186/s12915-015-0183-8}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-125550}, year = {2015}, abstract = {Background Bone morphogenetic protein (BMP)-2 and growth and differentiation factor (GDF)-5 are two related transforming growth factor (TGF)-β family members with important functions in embryonic development and tissue homeostasis. BMP-2 is best known for its osteoinductive properties whereas GDF-5—as evident from its alternative name, cartilage derived morphogenetic protein 1—plays an important role in the formation of cartilage. In spite of these differences both factors signal by binding to the same subset of BMP receptors, raising the question how these different functionalities are generated. The largest difference in receptor binding is observed in the interaction with the type I receptor BMPR-IA. GDF-5, in contrast to BMP-2, shows preferential binding to the isoform BMPR-IB, which is abrogated by a single amino acid (A57R) substitution. The resulting variant, GDF-5 R57A, represents a "BMP-2 mimic" with respect to BMP receptor binding. In this study we thus wanted to analyze whether the two growth factors can induce distinct signals via an identically composed receptor. Results Unexpectedly and dependent on the cellular context, GDF-5 R57A showed clear differences in its activity compared to BMP-2. In ATDC-5 cells, both ligands induced alkaline phosphatase (ALP) expression with similar potency. But in C2C12 cells, the BMP-2 mimic GDF-5 R57A (and also wild-type GDF-5) clearly antagonized BMP-2-mediated ALP expression, despite signaling in both cell lines occurring solely via BMPR-IA. The BMP-2- antagonizing properties of GDF-5 and GDF-5 R57A could also be observed in vivo when implanting BMP-2 and either one of the two GDF-5 ligands simultaneously at heterotopic sites. Conclusions Although comparison of the crystal structures of the GDF-5 R57A:BMPR-IAEC- and BMP-2:BMPR-IAEC complex revealed small ligand-specific differences, these cannot account for the different signaling characteristics because the complexes seem identical in both differently reacting cell lines. We thus predict an additional component, most likely a not yet identified GDF-5-specific co-receptor, which alters the output of the signaling complexes. Hence the presence or absence of this component then switches GDF-5′s signaling capabilities to act either similar to BMP-2 or as a BMP-2 antagonist. These findings might shed new light on the role of GDF-5, e.g., in cartilage maintenance and/or limb development in that it might act as an inhibitor of signaling events initiated by other BMPs.}, language = {en} } @phdthesis{Walter2008, author = {Walter, Thomas}, title = {Politische Determinanten von Auslandsinvestitionen und L{\"a}nderrisiken. Eine empirische Untersuchung mit Fallstudien zu Argentinien und Venezuela}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-48110}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2008}, abstract = {In den vergangenen Jahren traten auf den internationalen Kapitalm{\"a}rkten starke Ver{\"a}nderungen ein. Die {\"O}ffnung vieler L{\"a}nder f{\"u}r den internationalen Kapitalmarkt seit den 1980er Jahren f{\"u}hrte allgemein zu einem hohen Anstieg grenz{\"u}berschreitender Investitionen. Folgt man der wirtschaftswissenschaftlichen Theorie, sollte aber wesentlich mehr Kapital von Industriestaaten in arme L{\"a}nder fließen als es tats{\"a}chlich der Fall ist. Politische Faktoren bzw. politische L{\"a}nderrisiken sind entscheidende Faktoren zur Erkl{\"a}rung dieses Ph{\"a}nomens. Hauptgegenstand dieser Arbeit ist die Kl{\"a}rung der Wirkungszusammenh{\"a}nge zwischen Politik, Kapitalfl{\"u}ssen und L{\"a}nderrisiken. In der Arbeit werden verschiedene Formen internationalen Kapitals unterschieden. Es ist von entscheidender Bedeutung, wie sich politisches Risiko auf unterschiedliche Kapitalfl{\"u}sse wie Direktinvestitionen und Schuldenfl{\"u}sse auswirkt. Dem Kreditmarkt und dem Ph{\"a}nomen des Staatsbankrotts kommt hierbei eine Schl{\"u}sselrolle zu. Die Frage, unter welchen politischen Voraussetzungen sich Staaten am internationalen Kapitalmarkt verschulden, ist in der Literatur bislang vernachl{\"a}ssigt worden. Dieser Zusammenhang bestimmt jedoch zu einem hohen Grad die Auslandsschulden eines Landes bei gegebener Kreditw{\"u}rdigkeit. Die Arbeit konzentriert sich nicht nur auf den Faktor politisches Risiko, sondern beleuchtet die Rolle der „Politik" als Ganzes. Im ersten Teil der Arbeit Schritt wird der theoretische Zusammenhang zwischen politischen Variablen, Wirtschaftswachstum und verschiedenen Kapitalfl{\"u}ssen untersucht und darauf aufbauend Hypothesen gebildet. Im zweiten Schritt wird gezeigt, wie Investoren Politik bzw. politische Risiken hinsichtlich ihrer Investitionsm{\"o}glichkeiten wahrnehmen. Dies geschieht anhand der L{\"a}nderratings, die von Ratingagenturen ver{\"o}ffentlicht werden, um deren Einsch{\"a}tzung der Kreditw{\"u}rdigkeit eines Landes dem Markt mitzuteilen. Diese L{\"a}nderratings sind zu einem wichtigen Element im Wettbewerb staatlicher Akteure um die Gunst von Investoren geworden. Neben {\"o}konomischen Determinanten wird das L{\"a}nderrisiko auch von sozialen und politischen Faktoren beeinflusst. Es zeigt sich, dass gerade politische Risiken nur schwer voraussehbar und kaum operationalisierbar sind. Außerdem wird deutlich, dass es den Tr{\"a}gern der Analyse an Kompetenz gerade bei der Einsch{\"a}tzung politischer Risiken mangelt. Die Regressionsanalysen bilden den dritten Teil der Arbeit und werden mit einem globalen Datenpanel durchgef{\"u}hrt. Ein zweites Sample wird f{\"u}r Lateinamerika, den regionalen Schwerpunkt der Arbeit, erstellt. Es wird unterschieden nach den politischen Determinanten von Direktinvestitionen, Aktieninvestitionen und Schuldenfl{\"u}ssen. Die politischen Determinanten von L{\"a}nderratings werden separat untersucht. Fallstudien zu Argentinien und Venezuela vervollst{\"a}ndigen die Erkenntnisse der Untersuchung. In einem ersten Schritt wird dabei die jeweilige historische Entwicklung der Kapitalfl{\"u}sse der L{\"a}nder im Rahmen ihrer {\"o}konomischen und politischen Geschichte analysiert. Daran schließt sich eine Analyse der Perzeption politischer Risiken w{\"a}hrend der Schuldenkrise der 1980er Jahre an, die beide L{\"a}nder betraf. Es wird außerdem gezeigt, welche politischen Institutionen Einfluss auf die wirtschaftliche Leistungsf{\"a}higkeit beider L{\"a}nder haben. Hier wird f{\"u}r Venezuela vor allem die auf {\"O}l basierende Renten{\"o}konomie behandelt und im Falle Argentiniens der Fiskalf{\"o}deralismus. Am Beispiel der liberalen Reformen Anfang der 1990er Jahre wird gezeigt, warum die L{\"a}nder mit ihrer Politik trotz {\"a}hnlicher Bedingungen unterschiedliche Ergebnisse erzielten. Die Fallstudien schließen mit der Analyse j{\"u}ngerer Krisen und deren Folgen f{\"u}r die Investoren ab.}, subject = {L{\"a}nderrisiko}, language = {de} }