The RasGAP Gene, RASAL2, Is a Tumor and Metastasis Suppressor

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• 作者：Sara?Koenig McLaughlin ; Sarah?Naomi Olsen ; Benjamin Dake ; Thomas De?Raedt ; Elgene Lim ; Roderick?Terry Bronson ; Rameen Beroukhim ; Kornelia Polyak ; Myles Brown ; Charlotte Kuperwasser ; Karen Cichowski
• 刊名：Cancer Cell
• 出版年：2013
• 出版时间：9 September, 2013
• 年：2013
• 卷：24
• 期：3
• 页码：365-378
• 全文大小：4055 K

文摘

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Summary

RAS genes are commonly mutated in cancer; however, RAS mutations are rare in breast cancer, despite frequent hyperactivation of Ras and ERK. Here, we report that the RasGAP gene, RASAL2, functions as a tumor and metastasis suppressor. RASAL2 is mutated or suppressed in human breast cancer, and RASAL2 ablation promotes tumor growth, progression, and metastasis in mouse models. In human breast cancer, RASAL2 loss is associated with metastatic disease; low RASAL2 levels correlate with recurrence of luminal B tumors; and RASAL2 ablation promotes metastasis of luminal mouse tumors. Additional data reveal a broader role for RASAL2 inactivation in other tumor types. These studies highlight the expanding role of RasGAPs and reveal an alternative mechanism of activating Ras in cancer.