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  • 1
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    German Medical Science GMS Publishing House; Düsseldorf
    In:  80. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie; 20090520-20090524; Rostock; DOC09hnod165 /20090417/
    Publication Date: 2009-04-25
    Keywords: ddc: 610
    Language: German
    Type: conferenceObject
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  • 2
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    German Medical Science; Düsseldorf, Köln
    In:  77. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e.V.; 20060524-20060528; Mannheim; DOC06hnod196 /20060424/
    Publication Date: 2006-04-25
    Keywords: ddc: 610
    Language: German
    Type: conferenceObject
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  • 3
    Abstract: BACKGROUND: We conducted a large international study to estimate fractions of head and neck cancers (HNCs) attributable to human papillomavirus (HPV-AFs) using six HPV-related biomarkers of viral detection, transcription, and cellular transformation. METHODS: Formalin-fixed, paraffin-embedded cancer tissues of the oral cavity (OC), pharynx, and larynx were collected from pathology archives in 29 countries. All samples were subject to histopathological evaluation, DNA quality control, and HPV-DNA detection. Samples containing HPV-DNA were further subject to HPV E6*I mRNA detection and to p16(INK4a), pRb, p53, and Cyclin D1 immunohistochemistry. Final estimates of HPV-AFs were based on HPV-DNA, HPV E6*I mRNA, and/or p16(INK4a) results. RESULTS: A total of 3680 samples yielded valid results: 1374 pharyngeal, 1264 OC, and 1042 laryngeal cancers. HPV-AF estimates based on positivity for HPV-DNA, and for either HPV E6*I mRNA or p16(INK4a), were 22.4%, 4.4%, and 3.5% for cancers of the oropharynx, OC, and larynx, respectively, and 18.5%, 3.0%, and 1.5% when requiring simultaneous positivity for all three markers. HPV16 was largely the most common type. Estimates of HPV-AF in the oropharynx were highest in South America, Central and Eastern Europe, and Northern Europe, and lowest in Southern Europe. Women showed higher HPV-AFs than men for cancers of the oropharynx in Europe and for the larynx in Central-South America. CONCLUSIONS: HPV contribution to HNCs is substantial but highly heterogeneous by cancer site, region, and sex. This study, the largest exploring HPV attribution in HNCs, confirms the important role of HPVs in oropharyngeal cancer and drastically downplays the previously reported involvement of HPVs in the other HNCs.
    Type of Publication: Journal article published
    PubMed ID: 26823521
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  • 4
    Keywords: proliferation ; GENE ; METABOLISM ; colon ; CANCER-CELLS ; aerobic glycolysis ; IMAGE-ANALYSIS ; AVAILABLE WEB APPLICATION ; TKTL1 EXPRESSION ; BLOOD-TEST
    Abstract: Background: Biomarkers allowing the characterization of malignancy and therapy response of oral squamous cell carcinomas (OSCC) or other types of carcinomas are still outstanding. The biochemical suicide molecule endonuclease DNaseX (DNaseI-like 1) has been used to identify the Apo10 protein epitope that marks tumor cells with abnormal apoptosis and proliferation. The transketolase-like protein 1 (TKTL1) represents the enzymatic basis for an anaerobic glucose metabolism even in the presence of oxygen (aerobic glycolysis/Warburg effect), which is concomitant with a more malignant phenotype due to invasive growth/metastasis and resistance to radical and apoptosis inducing therapies. Methods: Expression of Apo10 and TKTL1 was analysed retrospectively in OSCC specimen (n = 161) by immunohistochemistry. Both markers represent independent markers for poor survival. Furthermore Apo10 and TKTL1 have been used prospectively for epitope detection in monocytes (EDIM)-blood test in patients with OSCC (n = 50), breast cancer (n = 48), prostate cancer (n = 115), and blood donors/controls (n = 74). Results: Positive Apo10 and TKTL1 expression were associated with recurrence of the tumor. Multivariate analysis demonstrated Apo10 and TKTL1 expression as an independent prognostic factor for reduced tumor-specific survival. Apo10+/TKTL1+ subgroup showed the worst disease-free survival rate in OSCC. EDIM-Apo10 and EDIM-TKTL1 blood tests allowed a sensitive and specific detection of patients with OSCC, breast cancer and prostate cancer before surgery and in after care. A combined score of Apo10+/TKTL1+ led to a sensitivity of 95.8% and a specificity of 97.3% for the detection of carcinomas independent of the tumor entity. Conclusions: The combined detection of two independent fundamental biophysical processes by the two biomarkers Apo10 and TKTL1 allows a sensitive and specific detection of neoplasia in a noninvasive and cost-effective way. Further prospective trials are warranted to validate this new concept for the diagnosis of neoplasia and tumor recurrence.
    Type of Publication: Journal article published
    PubMed ID: 24304513
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  • 5
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    German Medical Science GMS Publishing House; Düsseldorf
    In:  GMS Current Posters in Otorhinolaryngology - Head and Neck Surgery; VOL: 5; DOC59 /20090416/
    Publication Date: 2009-04-16
    Description: Einleitung: Einer wachsenden Anzahl von Berichten zur intratympanalen Glukokortikoid-Injektion steht eine Vielzahl offener Fragen bei der lokalen Medikamentenapplikation an das Innenohr gegenüber. So haben Experimente eine erhebliche Variabilität in den absoluten Konzentration in der Perilymphe und in den baso-apikalen Konzentrationsgradienten in der Scala tympani gezeigt. Die direkte intratympanale Applikation durch die Rundfenstermembran (RFM) sollte einen Vorteil einer besseren Steuerbarkeit von absoluter intracochleärer Konzentration und der Verteilung im Innenohr bieten. Methodik: In Meerschweinchen wurde in vivo die Verteilung von Dexamethason-dihydrogen-phosphat und seines aktiven Wirkstoffes Dexamethason in der Scala tympani nach intratympanaler Applikation von 2 µl Fortecortin® (10 mg/ml) gemessen. Ergebnisse: Die Ergebnisse zeigten eine hohe Variabilität in den intracochleären Konzentrationen. Die Spitzenkonzentration variierte von 206 to 1960 µg/ml (MW: 1101,37 µg/ml, SD: +/- 733,35 µg/ml) zu einem Zeitpunkt von 20 min nach Applikationsende und von 93 µg/ml to 1616 µg/ml (MW: 633,08 µg/ml, SD: +/- 714,95 µg/ml eine Stunde nach Applikationsende. Die für die extracochleäre Applikation an die RFM vorbeschriebenen Konzentrationsgradienten blieben auch nach längeren Beobachtungszeiten bestehen. Schlussfolgerungen: Bei der intracochleären Medikamentenapplikation durch die RFM ist es von besonderer Bedeutung, die durch die Applikationskapillare verursachten "Lecks" in der RFM zu kontrollieren. Auch bei der intracochleären Applikation durch die RFM erhalten basale Abschnitte der Cochlea weitaus höhere Medikamentenkonzentrationen als apikale, was die Auswahl der geeigneten Zielregion für diese Applikationsform beeinflusst. Unterstützt durch: BMBF-projekt 0313844B (SP).
    Keywords: ddc: 610
    Language: German
    Type: article
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