Abstract:The lymphatic vessels are thought to contribute to metastasis primarily by serving as a transportation system. It is widely believed that tumor cells enter lymph nodes passively, by the flow of lymph. Here, we demonstrate that lymph node lymphatic sinuses control tumor cell entry into the lymph node. In vitro, tumor migration to lymphatic endothelium (LECs) was inhibited by blocking CCR8 or CCL1. Recombinant CCL1 promoted migration of CCR8+ tumor cells. Pro-inflammatory mediators TNF-α, IL-1α and LPS increased… Show more
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