Eosinophils have long been known to infiltrate tumors, and in most cases, this is associated with an improved prognosis. However, the reasons behind this infiltration and the mechanism of action of the eosinophil have remained elusive. In this article, we explore the biology of eosinophils and examine their function in homeostasis and disease states, specifically focusing on what is currently known about the association of the eosinophil with cancer. Cancer Immunol Res; 2(1); 1-8. Ó2014 AACR.
Disclosure of Potential Conflicts of InterestM.E. Rothenberg has an ownership Interest in Immune Pharmaceuticals and Receptos; is a consultant/advisory board member of Immune Pharmaceuticals, Norvatis, Pluristem Therapeutics, and Receptos; and has royalty to reslizumab (Teva Pharmaceuticals). No potential conflicts of interest were disclosed by the other author.
CME Staff Planners' DisclosuresThe members of the planning committee have no real or apparent conflicts of interest to disclose.
Learning ObjectivesEosinophils, discovered over 150 years ago, are present in various lesions, and tumor-associated tissue eosinophilia has been correlated with both good and bad prognosis for cancer. Upon completion of this activity, the participant should gain a basic knowledge of the biology of eosinophils, and their potential roles in homeostasis and in diseases. A broader understanding of these granulocytic leukocytes and their interaction with other immune cells will inform research on their potential to affect tumors and to improve cancer therapy.