angiotensin-i and Adenocarcinoma-of-Lung

The local renin-angiotensin system (RAS) is one of the crucial components in the tumor microenvironment. Recent evidence suggests that the local RAS plays an important role in tumor metabolism, survival, angiogenesis and invasion processes. Angiotensin-(1-7) [Ang-(1-7)] is an endogenous peptide of the RAS with vasodilator and anti-proliferative properties. Previous studies have demonstrated that Ang-(1-7) inhibits both the growth of human lung cancer cells in vitro and tumor angiogenesis in vivo through activation of the MAS receptor. This study investigated the anti-metastatic effect of Ang-(1-7) in A549 human lung adenocarcinoma cells in vitro. We found that Ang-(1-7) reduced the cell migratory and invasive abilities by reducing the expression and activity of MMP-2 and MMP-9. Furthermore, we demonstrated that the anti-migration and anti-invasion effect of Ang-(1-7) was mediated through inactivation of the PI3K/Akt, P38 and JNK signal pathways. Our results suggest that Ang-(1-7) may have therapeutic potential against advanced lung carcinoma as a new agent.

Topics: Adenocarcinoma; Adenocarcinoma of Lung; Angiotensin I; Cell Line, Tumor; Cell Movement; Cell Proliferation; Humans; Lung Neoplasms; MAP Kinase Signaling System; Matrix Metalloproteinase 2; Matrix Metalloproteinase 9; Mitogen-Activated Protein Kinase Kinases; Neoplasm Invasiveness; Neovascularization, Pathologic; Peptide Fragments; Phosphatidylinositol 3-Kinases; Phosphoinositide-3 Kinase Inhibitors; Proto-Oncogene Proteins c-akt; Renin-Angiotensin System; Signal Transduction; Survival