AKT1 Activation Promotes Development of Melanoma Metastases

作者：Cho Joseph H; Robinson James P; Arave Rowan A; Burnett William J; Kircher David A; Chen Guo; Davies Michael A; Grossmann Allie H; VanBrocklin Matthew W; McMahon Martin; Holmen Sheri L^*

来源：Cell Reports, 2015, 13(5): 898-905.

DOI：10.1016/j.celrep.2015.09.057

Metastases are the major cause of melanoma-related mortality. Previous studies implicating aberrant AKT signaling in human melanoma metastases led us to evaluate the effect of activated AKT1 expression in non-metastatic BRAF(V600E)/Cdkn2a(Null) mouse melanomas in vivo. Expression of activated AKT1 resulted in highly metastatic melanomas with lung and brain metastases in 67% and 17% of our mice, respectively. Silencing of PTEN in BRAF(V600E)/Cdkn2a(Null) melanomas cooperated with activated AKT1, resulting in decreased tumor latency and the development of lung and brain metastases in nearly 80% of tumor-bearing mice. These data demonstrate that AKT1 activation is sufficient to elicit lung and brain metastases in this context and reveal that activation of AKT1 is distinct from PTEN silencing in metastatic melanoma progression. These findings advance our knowledge of the mechanisms driving melanoma metastasis and mayprovide valuable insights for clinical management of this disease.

• 出版日期2015-11-3