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The multifaceted role of MTDH/AEG-1 in cancer progression Hu G; Wei Y; Kang YClin Cancer Res 2009[Sep]; 15 (18): 5615-20Cancer is the result of the progressive acquisition of multiple malignant traits through the accumulation of genetic or epigenetic alterations. Recent studies have established a functional role of MTDH (Metadherin)/AEG-1 (Astrocyte Elevated Gene 1) in several crucial aspects of tumor progression, including transformation, evasion of apoptosis, invasion, metastasis, and chemoresistance. Overexpression of MTDH/AEG-1 is frequently observed in melanoma, glioma, neuroblastoma, and carcinomas of breast, prostate, liver, and esophagus and is correlated with poor clinical outcomes. MTDH/AEG-1 functions as a downstream mediator of the transforming activity of oncogenic Ha-Ras and c-Myc. Furthermore, MTDH/AEG-1 overexpression activates the PI3K/Akt, nuclear factor kappaB (NFkappaB), and Wnt/beta-catenin signaling pathways to stimulate proliferation, invasion, cell survival, and chemoresistance. The lung-homing domain of MTDH/AEG-1 also mediates the adhesion of tumor cells to the vasculature of distant organs and promotes metastasis. These findings suggest that therapeutic targeting of MTDH/AEG-1 may simultaneously suppress tumor growth, block metastasis, and enhance the efficacy of chemotherapeutic treatments.|Animals[MESH]|Cell Adhesion Molecules/genetics/*metabolism[MESH]|Disease Progression[MESH]|Humans[MESH]|Membrane Proteins/genetics/*metabolism[MESH]|Neoplasms/genetics/*metabolism/*pathology[MESH]|RNA-Binding Proteins[MESH] |
