Exploration of new therapy and diagnosis in lymph metastasis of lung cancer based on theprofile of lymphangiogenic-related genes expression

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Based on our recognition for the importance of tumor microenvironment(TM), TM induces acquisition of malignant phenotype such as epithelial-mesenchymal transition (EMT), resulting in metastasis into lymph nodes. In this study, persistent tissue hypoxia might be involved in tumor tissue in an in vivo orthotopic intrapulmonary implantation model. Persistent hypoxia also induced the stabilized HIF1α expression in lung cancer cells. Transduction of HIF1α into lung cancers with the Doxycycline inducible gene expression system caused de novo VEGF-A expression. Taken together with the evidence of increasing VEGF receptor expression lymphatic endothelial cells in sentinel lymph nodes, hypoxia as TM in lung cancers might be a therapeutic target for the metastasis into lymph nodes and lymphangiogenesis.