Thérapies ciblées et carcinomes basocellulaires
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文摘
Basal cell carcinomas (BCCs) are the most frequent cancers in fair-skin adult patients. While most of them are accessible to medical or surgical treatment, some rare locally destructive forms (so called locally advanced BCC or someexceptionalmetastatic forms) cannot be treated by surgery or radiotherapy. Conventional chemotherapy (cisplatin, doxorubicine) is often difficult to perform as it is mostly palliative and not well tolerated in elderly patients. In 1996, the molecular pathway involved in BCC formation was identified: the patch/sonic/hedgehog pathway. Since then, major efforts have been performed to develop a targeted therapy to control the abnormal activation of the pathway. In 2009, results of the first phase I study were published using an anti-smo: the GDC-449 or vismodegib showing tolerability and anti-tumoral efficacy of this product. Response rates around 50% for both locally advanced and metastatic BCC have been obtained which were never achieved before. Since then several phase II studies have confirmed the efficacy of anti-smo molecules and extended their trial in the high risk for BCC Gorlin syndrome for multiple operable BCC. Long-termtolerability for these molecules is still not optimal andmust be improved. Targeted anti-smo molecule dramatically changes the strategy of care of patients with locally advanced ormetastatic BCC. In early 2012, vismodegib was approved by the FDA for the treatment of locally advanced or metastatic BCC.

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