119 research outputs found

    In vitro chemosensitivity of head and neck cancer cell lines

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    BACKGROUND: Systemic treatment of head and neck squamous cell carcinoma (HNSCC) includes a variety of antineoplastic drugs. However, drug-resistance interferes with the effectiveness of chemotherapy. Preclinical testing models are needed in order to develop approaches to overcome chemoresistance. METHODS: Ten human cell lines were obtained from HNSCC, including one with experimentally-induced cisplatin resistance. Inhibition of cell growth by seven chemotherapeutic agents (cisplatin, carboplatin, 5- fluorouracil, methotrexate, bleomycin, vincristin, and paclitaxel) was measured using metabolic MTT-uptake assay and correlated to clinically-achievable plasma concentrations. RESULTS: All drugs inhibited cell growth in a concentration-dependent manner with an IC50 comparable to that achievable in vivo. However, response curves for methotrexate were unsatisfactory and for paclitaxel, the solubilizer cremophor EL was toxic. Cross-resistance was observed between cisplatin and carboplatin. CONCLUSION: Chemosensitivity of HNSCC cell lines can be determined using the MTT-uptake assay. For DNA-interfering cytostatics and vinca alkaloids this is a simple and reproducible procedure. Determined in vitro chemosensitivity serves as a baseline for further experimental approaches aiming to modulate chemoresistance in HNSCC with potential clinical significance

    Funktionell-ästhetische Nasenrekonstruktion bei Morbus Wegener und Lupus Erythematodes

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    Organisation eines "Ear Camps" in Nord Namibia

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    Sektorenverbindende Versorgung von HNO-Notfällen im Petrus-Krankenhaus Wuppertal

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    Die Gefahr lärmbedingter Innenohrschäden des HNO-Chirurgen durch die intraoperative Herstellung von crushed Knorpel

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    Bursa des Kiefergelenkes als Differentialdiagnose für eine Raumforderung im Bereich der Glandula parotis

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    Andere Länder - andere Sitten. "Ear Camps" in Nord-Namibia: Probleme und Lösungsansätze

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