Journal
CLINICAL CANCER RESEARCH
Volume 19, Issue 10, Pages 2598-2604Publisher
AMER ASSOC CANCER RESEARCH
DOI: 10.1158/1078-0432.CCR-12-0962
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Funding
- U.S. NIH [R01-AI084880, P50-CA086355]
- EMBO
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Cancer is not merely a cell-intrinsic genetic disease but also the result of complex cell-extrinsic interactions with host components, including immune cells. For example, effector T lymphocytes and natural killer cells are thought to participate in an immunosurveillance process, which eliminates neoplastic cells, whereas regulatory T lymphocytes and some myeloid cells, including macrophages, can create a milieu that prevents antitumor activity, supports tumor growth, and reduces survival of the host. Increasing evidence supports the notion that carcinoma cells communicate with immune cells directly, both within and away from the tumor stroma, and that this process fosters suppression of immunosurveillance and promotes tumor outgrowth. An important mode of communication between carcinoma cells and immune cells may involve tumor-derived microvesicles (tMV), also known as exosomes, ectosomes, or microparticles. These microvesicles carry lipids, proteins, mRNAs and microRNAs and travel short or long distances to deliver undegraded and undiluted material to other cells. Here, we consider the capacity of tMVs to control tumor-associated immune responses and highlight the known and unknown actions of tMVs in vivo. We also discuss why microvesicles may play a role in cancer diagnostics and prognostics and how they could be harnessed for anticancer therapy. (C) 2013 AACR.
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