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  • Title: All-trans retinoic acid downregulates ALK in neuroblastoma cell lines and induces apoptosis in neuroblastoma cell lines with activated ALK.
    Author: Futami H, Sakai R.
    Journal: Cancer Lett; 2010 Nov 28; 297(2):220-5. PubMed ID: 20576349.
    Abstract:
    Recently, gene amplification and gain-of-function mutations of ALK have been found in some neuroblastoma cell lines and clinical tumor samples. We have previously reported that knockdown of ALK by RNAi induced apoptosis in neuroblastoma cells with gene amplification of ALK. We report that all-trans retinoic acid (ATRA) downregulates ALK in neuroblastoma cell lines. Downregulation of ALK protein by ATRA was accompanied by apoptosis in neuroblastoma cells with gene amplification or gain-of-function mutation of ALK but not in neuroblastoma cells without these genetic alterations. These results suggest that ALK downregulation by ATRA might lead to apoptosis in neuroblastoma cells with activated ALK.
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