RUNX2 and the PI3K/AKT axis reciprocal activation as a driving force for tumor progression
Karine A Cohen-Solal1, Rajeev K Boregowda2, Ahmed Lasfar3,4
1Rutgers Cancer Institute of New Jersey, Department of Medicine, Division of Medical Oncology - Rutgers, the State University of New Jersey, Robert Wood Johnson Medical School, 195 Little Albany Street, New Brunswick, New Jersey, 08903, USA. cohenska@cinj.rutgers.edu.
Abstract:
From the first reported role of the transcription factor RUNX2 in osteoblast and chondrocyte differentiation and migration to its involvement in promigratory/proinvasive behavior of breast, prostate, and thyroid cancer cells, osteosarcoma, or melanoma cells, RUNX2 currently emerges as a key player in metastasis. In this review, we address the interaction of RUNX2 with the PI3K/AKT signaling pathway, one of the critical axes controlling cancer growth and metastasis. AKT, either by directly phosphorylating/activating RUNX2 or phosphorylating/inactivating regulators of RUNX2 stability or activity, contributes to RUNX2 transcriptional activity. Reciprocally, the activation of the PI3K/AKT pathway by RUNX2 regulation of its different components has been described in non-transformed and transformed cells. This mutual activation in the context of cancer cells exhibiting constitutive AKT activation and high levels of RUNX2 might constitute a major driving force in tumor progression and aggressiveness.
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