Pancreatic cancer microenvironment: a current dilemma

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<jats:title>Abstract</jats:title><jats:p>Pancreatic cancer is one of the leading causes of cancer‐related death in the United States and survival outcomes remain dismal despite significant advances in molecular diagnostics and therapeutics in clinical practice. The microenvironment of pancreatic cancer carries unique features with increased desmoplastic reaction and is infiltrated by regulatory T cells and myeloid‐derived suppressor cells which negatively impact the effector immune cells. Current evidence suggests that stellate cell‐induced hypovascular stroma may have direct effects on aggressive behavior of pancreatic cancer. Preclinical studies suggested improvement in drug delivery to cancer cells with stroma modifying agents. However these findings so far have not been confirmed in clinical trials. In this article, we elaborate current‐state‐of‐the science of the pancreatic cancer microenvironment and its impact on molecular behavior of cancer cells, chemotherapy resistance and druggability of stroma elements in combination with other agents to enhance the efficacy of therapeutic approaches.</jats:p>

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