Tumor-derived Exosomes Contribute to a Pro-inflammatory Tumor Microenvironment through the Stimulation of Chemokines and Cytokines in Mesenchymal Stromal Cells and MacrophagesWednesday, 27 March 2019 at 11:45 Add to Calendar ▼2019-03-27 11:45:002019-03-27 12:45:00Europe/LondonTumor-derived Exosomes Contribute to a Pro-inflammatory Tumor Microenvironment through the Stimulation of Chemokines and Cytokines in Mesenchymal Stromal Cells and MacrophagesCirculating Biomarkers World Congress 2019 in Coronado Island, CaliforniaCoronado Island, CaliforniaSELECTBIOenquiries@selectbiosciences.com Exosomes are members of a large family of extracellular vesicles involved in cell-cell communication that play important regulatory functions in physiological and pathological conditions. Using neuroblastoma (NB), the second most common solid tumor in children and a cancer that is highly metastatic to the bone marrow and the liver as a model, we show that NB-derived exosomes contribute to the stimulation of several protumorigenic cytokines and chemokines (IL-6, IL-8, MCP-1, VEGF) by mesenchymal stromal cells (MSC) and macrophages via ERK1/2 activation. In vivo NB-derived exosomes are also preferentially captured by macrophages at the site of metastasis (bone marrow and liver). Altogether these cytokines promotes the proliferation of tumor cells, their resistance to chemotherapy and immune escape via STAT3 and ERK1/2 activation. |