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Vismodegib, an inhibitor of the Hedgehog signaling pathway, is an approved drug for monotherapy in locally advanced or metastatic basal cell carcinoma (BCC). Data on combined modality treatment by vismodegib and radiation therapy, however, are rare. In the present study, we examined the radiation sensitizing effects of vismodegib by analyzing viability, cell cycle distribution, cell death, DNA damage repair and clonogenic survival in three-dimensional cultures of a BCC and a head and neck squamous cell carcinoma (HNSCC) cell line. We found that vismodegib decreases expression of the Hedgehog target genes glioma-associated oncogene homologue (GLI1) and the inhibitor of apoptosis protein (IAP) Survivin in a cell line- and irradiation-dependent manner, most pronounced in squamous cell carcinoma (SCC) cells. Furthermore, vismodegib significantly reduced proliferation in both cell lines, while additional irradiation only slightly further impacted on viability. Analyses of cell cycle distribution and cell death induction indicated a G1 arrest in BCC and a G2 arrest in HNSCC cells and an increased fraction of cells in SubG1 phase following combined treatment. Moreover, a significant rise in the number of phosphorylated histone-2AX/p53-binding protein 1 (γH2AX/53BP1) foci in vismodegib- and radiation-treated cells was associated with a significant radiosensitization of both cell lines. In summary, these findings indicate that inhibition of the Hedgehog signaling pathway may increase cellular radiation response in BCC and HNSCC cells.
Using photo elicitation to introduce a network perspective on attachment during middle childhood
(2018)
In this article, we develop a child-centered network approach to attachment during middle childhood. Following monotropic ideas, current attachment research focuses on parental attachment figures despite the expansion of the children’s social environment during middle childhood, failing to generate a comprehensive and structured overview of all individuals who ensure the children’s feeling of safety. Relying on quantitative methods, these studies are also dominated by an adult perspective, limiting the children’s contributions. While there have been theoretical drafts of attachment networks during childhood, this article constitutes the first practical implementation. Using photo elicitation interviews and participant observations, we developed an innovative assessment strategy that allows children to exhaustively identify and characterize all their attachment figures on sociostructural and functional dimensions, thus positioning the children at the center of their comprehensive attachment networks that collectively contribute to their feeling of security. We combine qualitative and quantitative data to assess the children’s own understanding of their feeling of security and to locate the individual attachment figure on context-specific social dimensions, thus making the research setting, a clan in Cameroon, an inherent part of the methodological development. The data are translated into multidimensional network diagrams to visualize the children’s perception of their attachment environment and the emerging patterns of their selection. We present an exemplary network, supplementing it with observational data to discuss the ecological validity of our approach.
Comparative proteomics reveals a diagnostic signature for pulmonary head‐and‐neck cancer metastasis
(2018)
Patients with head‐and‐neck cancer can develop both lung metastasis and primary lung cancer during the course of their disease. Despite the clinical importance of discrimination, reliable diagnostic biomarkers are still lacking. Here, we have characterised a cohort of squamous cell lung (SQCLC) and head‐and‐neck (HNSCC) carcinomas by quantitative proteomics. In a training cohort, we quantified 4,957 proteins in 44 SQCLC and 30 HNSCC tumours. A total of 518 proteins were found to be differentially expressed between SQCLC and HNSCC, and some of these were identified as genetic dependencies in either of the two tumour types. Using supervised machine learning, we inferred a proteomic signature for the classification of squamous cell carcinomas as either SQCLC or HNSCC, with diagnostic accuracies of 90.5% and 86.8% in cross‐ and independent validations, respectively. Furthermore, application of this signature to a cohort of pulmonary squamous cell carcinomas of unknown origin leads to a significant prognostic separation. This study not only provides a diagnostic proteomic signature for classification of secondary lung tumours in HNSCC patients, but also represents a proteomic resource for HNSCC and SQCLC.
The multi-valence nature of vanadium means that its geochemical behaviour will be ƒO2-dependent, so that its concentration or V/Sc (or V/Ga), can serve as proxies for oxidation state in mantle peridotites. Compared to Fe3+/Fe2+-based equilibria, such trace elements may be less sensitive to metasomatic processes. To investigate these systematics, we have measured V, Sc, Ga and Fe3+ contents in clinopyroxene from well-characterised spinel peridotite xenoliths from the Massif Central, France. These samples were metasomatised by a variety of agents with different oxidation states.V contents can be modified by metasomatic interactions, and other geochemically similar elements including Sc and Ga can also be added, removed or remain constant. A link between V/Sc and Fe3+-Fe2+ equilibria is apparent. Partial removal of V is caused by different metasomatic agents; the common factor is that all agents were significantly more oxidised than the initial ambient mantle peridotite. This extraction can be understood by a decreasing partition coefficient for V for ΔlogƒO2 > ~FMQ-2. Considering that mineral/melt partitioning of V decreases similarly for all peridotite minerals, the bulk-rock V/Sc will also change during relatively oxidising metasomatic interactions and mirror the results obtained for clinopyroxene.
Latent myofascial trigger points (MTrP) have been linked to several impairments of muscle function. The present study was conducted in order to examine whether a single bout of self-myofascial release using a foam roller is effective in reducing MTrP sensitivity. Fifty healthy, pain-free subjects (26.8±6 years, 21 men) with latent MTrP in the lateral gastrocnemius muscle were included in the randomized, controlled trial. One week after a familiarization session, they were randomly allocated to three groups: (1) static compression of the most sensitive MTrP using a foam roll, (2) slow dynamic foam rolling of the lateral calf and (3) placebo laser acupuncture of the most sensitive MTrP. Treatment duration in each group was 90 seconds. The pressure pain threshold (PPT) of the most sensitive MTrP was assessed using a handheld algometer prior to and after the intervention. A repeated measures analysis of variance (3x2) did not reveal significant between‑group interactions (p>.05) but showed a significant time effect (F=7.715, p<.05). While placebo and dynamic selfmyofascial release did not change MTrP sensitivity (p>.05), static compression of MTrP increased the PPT (2.6±0.8 to 3.0±1.1, d=.35; p<.05). Static self-myofascial release using a foam roller might represent an alternative to reduce pressure pain of latent MTrP. Additional research should aim to extend these findings to patients and athletes with myofascial pain syndromes.
Fungi indirectly affect plant root architecture by modulating soil volatile organic compounds
(2018)
The plant-growth modulating effect of microbial volatile organic compounds (VOCs) has been demonstrated repeatedly. This has most often been performed by exposing plants to VOC released by microbes grown on nutrient rich media. Here, we used soil instead to grow fungi of the Fusarium genus and investigate how VOCs emitted by this system influenced the development of Arabidopsis plants. The volatile profiles of Fusarium strains grown in soil and malt extract were also compared. Our results demonstrate that distinct volatile signatures can be attributed to different Fusarium genetic clades but also highlight a major influence of the growth medium on volatile emission. Furthermore, all soil-grown Fusarium isolates increased primary root length in Arabidopsis by decreasing VOC concentrations in soil. This result represents a major paradigm shift in plant-microbe interactions since growth modulating effects have been attributed so far to the emission and not the consumption of volatile signals.
Tapping the full potential? Jumping performance of volleyball athletes in game-like situations
(2018)
Background: One key issue in elite interactive team sports is the simultaneous execution of motor actions (e.g., dribbling a ball) and perceptual-cognitive tasks (e.g., visually scanning the environment for action choices). In volleyball, one typical situation is to prepare and execute maximal block jumps after multiple-options decision-making and concurrent visual tracking of the ongoing game dynamics to find an optimal blocking location. Based on resource-related dual- and multi-tasking theories simultaneous execution of visual-cognitive and motor tasks may interfere with each other. Therefore, the aim of this study was to investigate whether volleyball-specific perceptual-cognitive demands (i.e., divided attention, decision making) affect blocking performance (i.e., jumping performance and length of the first step after the ready-block-position) compared to relatively isolated jumping performance.
Methods: Twenty-two elite volleyball players (1st – 3rd German league) performed block jumps in front of a net construction in a single-task condition (ST) and in two perceptual (-cognitive) dual-task conditions including a dual-task low (DT_L; presenting a picture of an opponent attack on a screen) and a dual-task high condition (DT_H; presenting videos of an offensive volleyball set play with a two-alternative choice).
Results: The results of repeated-measures ANOVAs showed a significant effect of conditions on jumping performance [F(2,42) = 33.64, p < 0.001, ηp2 = 0.62] and on the length of the first step after the ready-block-position [F(2,42) = 7.90, p = 0.001, ηp2 = 0.27). Post hoc comparisons showed that jumping performance in DT_H (p < 0.001) and DT_L (p < 0.001) was significantly lower than in ST. Also, length of the first step after the ready-block-position in DT_H (p = 0.005) and DT_L (p = 0.028) was significantly shorter than in ST.
Conclusion: Our findings suggest that blocking performance (i.e., jumping height, length of the first step) decreases in elite volleyball players when a perceptual (-cognitive) load is added. Based on the theory of Wickens (2002), this suggests a resource overlap between visual-processing demands for motor performance and for tracking the dynamics of the game. Interference with the consequence of dual-task related performance costs can therefore also be found in elite athletes in their specific motor expert domain.
Die Germanistikabteilung der Philologischen Fakultät in Kronstadt/Braşov veranstaltete in Zusammenarbeit mit der Gesellschaft der Germanisten Rumäniens [GGR] (Zweigstelle Kronstadt) und mit dem Generalkonsulat der Bundesrepublik Deutschland in Hermannstadt zwischen dem 30. März und 01. April 2017 ihre XX. Internationale Tagung zum Thema Luthers Reformation und deren Wirkung auf Sprache, Literatur und Kultur.
Die Kulturabteilung der Deutschen Botschaft Ankara, das DAAD-Informationszentrum Ankara und die Hacettepe Universität boten im Wintersemester 2016 für interessierte Masterstudierende und Doktoranden ein Workshop-Seminar zu transkulturellen Konzepten von Zeit und Raum in den Werken Ilija Trojanows an. Konzepte von Fremdheit, Migration, Transkulturalität sowie Raum und Zeit standen besonders im Fokus der Veranstaltung. In seinen Werken wirft Trojanow den Blick auf die Ausbildung interkultureller Identitäten und die damit einhergehenden Dimensionen von Fremdheit, Ablehnung und Identitäts- bzw. Zugehörigkeitsdiffusionen. Die Entfremdung von der eigenen Kultur und den damit verbundenen Perspektivwechsel thematisiert Trojanow unter anderem in seinem Werk Der Weltensammler.
In diesem Seminar stand jedoch nicht nur der Roman Der Weltensammler im Vordergrund, sondern unterschiedlichste Literatur Trojanows. Angeleitet wurden die Nachwuchswissenschaftler über zwei Präsenzseminare zum Thema Kulturanalyse und Anwendung von Methoden in der Literaturwissenschaft. Der Mehrwert des Workshop-Seminars bestand darin, dass die Studierenden Fragen aus den Werken anhand von Hypothesen direkt an den Autor stellen konnten. Um diese auch anderen Wissenschaftlern nicht vorzuenthalten, entschied man den Workshop aufzunehmen und im Anschluss zu transkribieren. Dieses Transkript bietet eine Stellungnahme über die Literatur und Philosophie Ilija Trojanows an und trägt gleichzeitig zum Textverständnis seiner Werke bei.
Folgende Werke Trojanows wurden für den Workshop ausgewählt:
Meine Olympiade: Ein Amateur, vier Jahre, 80 Disziplinen
Der Weltensammler
Der überflüssige Mensch
Macht und Widerstand
Zu den heiligen Quellen des Islam: Als Pilger nach Mekka und Medina
Die Versuchungen der Fremde: Unterwegs in Arabien, Indien und Afrika
Döner in Walhalla oder welche Spuren hinterlässt der Gast, der keiner mehr ist.
Die Studierenden, die sich eingehend mit der Literatur in Vorlauf-Präsenzseminaren beschäftigt hatten, entwarfen (kontroverse) Hypthesen, die sie Herrn Trojanow im Workshop vortrugen. Folgende Transkription wiederspiegelt einen Abriss über die Literatur Trojanows und zeigt gleichzeitig Antworten, die zum Teil auch aus einem sehr philosophischen Terminus entspringen.
Üniversiteler bilginin üretildiği yerlerdir. Bu bilgiler paylaşıldıkça anlam kazanırlar. Küresel dünyada üniversitelerden beklenen, bu bilgi paylaşımının yoğun olmasıdır. Yabancı dil bilmek bu aşamada oldukça önemlidir. Akademisyenlerin bu bilgi ağına katılım etkinliği, yabancı dili sözlü ve yazılı etkin kullanabilmesine bağlıdır. Bu çalışmanın amacı, öğretim üyelerinin yabancı dil seviyelerinin demografik değişkenlere göre ölçülmesi ve yabancı dil kullanım amaçlarının betimlenmesidir. Çalışmaya 2015 yılında Trakya Üniversitesi'nde çalışan 269 öğretim üyesi katkı sağlamıştır. Öğretim üyelerinin yabancı dil seviyeleri 'Diller için Avrupa Ortak Öneriler Çerçevesi - Ortak Öneri Düzeyleri Genel Basamaklar Kümesi - A1, A2, B1, B2, C1 ve C2' aracılığı ile ölçülmüştür. Yabancı dil kullanım amaçları ise güvenilirlik oranı % 95 olan bir ölçme aracı ile ölçülmüştür. Betimsel bir yaklaşımla yürütülen çalışmada veriler yüzdelik olarak hesaplanmıştır. Verilerin analizi çalışmaya katılan öğretim üyelerinin yaklaşık üçte birinin B1 (%30,1) ve B2 (%30,1) seviyelerinde olduğunu göstermiştir. Ayrıca yabancı dili kullanma amaçları (akademik, eğitim-öğretim ve kişisel) arasında alımlamaya ve üretime yönelik becerilerde farklılıklar tespit edilmiştir.