¦Â-Catenin Signaling Controls Metastasis in Braf-Activated Pten-Deficient Melanomas

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• 作者：William  ; E. Damsky¹ ;   ; ³ ;   ; ^{william.damsky@uvm.edu} ; David  ; P. Curley³ ;   ; ⁴ ; Manjula Santhanakrishnan¹ ; Lara  ; E. Rosenbaum¹ ; James  ; T. Platt¹ ; Bonnie  ; E. Gould  ; Rothberg² ; Makoto  ; M. Taketo⁵ ; David Dankort⁶ ; David  ; L. Rimm² ; Martin McMahon⁷ ;   ; ⁸ ;   ; ⁹ ; Marcus Bosenberg¹ ;   ; ² ;   ; ^{marcus.bosenberg@yale.edu}
• 刊名：Cancer Cell
• 出版年：2011
• 出版时间：13 December 2011
• 年：2011
• 卷：20
• 期：6
• 页码：741-754
• 全文大小：2002 K

文摘

Summary

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 ¦Â-catenin levels?in a mouse model of melanoma that is based on melanocyte-specific Pten loss and Braf^V600E mutation, we demonstrate that ¦Â-catenin is a central mediator of melanoma metastasis to the lymph nodes and lungs. In addition to altering metastasis, ¦Â-catenin levels control tumor differentiation and regulate both MAPK/Erk and PI3K/Akt signaling. Highly metastatic tumors with ¦Â-catenin stabilization are very similar to a subset of human melanomas. Together these findings establish Wnt signaling as a metastasis regulator in melanoma.