β-catenin signaling controls metastasis in Braf-activated Pten-deficient melanomas.

β-catenin signaling controls metastasis in Braf-activated Pten-deficient melanomas.
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DOI:
10.1016/j.ccr.2011.10.030
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发表时间:
2011-12-13
期刊:
影响因子:
50.3
通讯作者:
Bosenberg M
Bosenberg M
中科院分区:
医学1区
文献类型:
--
作者:
Damsky WE;Curley DP;Santhanakrishnan M;Rosenbaum LE;Platt JT;Gould Rothberg BE;Taketo MM;Dankort D;Rimm DL;McMahon M;Bosenberg M

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恶性黑色素瘤的特点是频繁转移,但调节这一过程的具体变化尚未明确描述。尽管众所周知 Wnt 信号传导在黑色素瘤中经常失调,但这一观察结果的功能意义尚不清楚。通过调节基于黑色素细胞特异性 Pten 缺失和 BrafV600E 突变的黑色素瘤小鼠模型中的 β-连环蛋白水平,我们证明 β-连环蛋白是黑色素瘤转移至淋巴结和肺部的中心介质。除了改变转移之外,β-连环蛋白水平还控制肿瘤分化并调节 MAPK/Erk 和 PI3K/Akt 信号传导。具有 β-连环蛋白稳定性的高度转移性肿瘤与人类黑色素瘤的一个子集非常相似。这些发现共同证实了 Wnt 信号传导作为黑色素瘤的转移调节因子。
Malignant melanoma is characterized by frequent metastasis, however specific changes that regulate this process have not been clearly delineated. Although it is well known that Wnt signaling is frequently dysregulated in melanoma, the functional implications of this observation are unclear. By modulating β-catenin levels in a mouse model of melanoma that is based on melanocyte-specific Pten loss and BrafV600E mutation, we demonstrate that β-catenin is a central mediator of melanoma metastasis to lymph node and lung. In addition to altering metastasis, β-catenin levels control tumor differentiation and regulate both MAPK/Erk and PI3K/Akt signaling. Highly metastatic tumors with β-catenin stabilization are very similar to a subset of human melanomas. Together these findings establish Wnt signaling as a metastasis regulator in melanoma.
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