Accumulation of Myeloid-Derived Suppressor Cells: A New Mechanism in Favor of Stress-Induced Immunosuppression?
Jianfeng Jin et al. present a mechanism for the immunosuppressive potential of chronic stress in the September 2013 issue of PLoS One. The authors focus on myeloid-derived suppressor cells (MDSCs), which have been implicated in regulation of the innate and adaptive immune responses. In tumor microenvironments, MDSC expansion is stimulated by prostaglandin E2 (PGE2) and […]
A new study in Cellular Immunology is perhaps the first to specifically measure levels of myeloid-derived suppressor cells (MDSC) in post operative breast cancer patients who were considered to be macroscopically disease-free. In this study, Bethany Mundy-Bosse and colleagues from the Department of Integrated Biomedical Sciences, the Ohio State University, Columbus OH investigated the association […]
A new Proceedings of the National Academy of Sciences of the USA (PNAS) study suggests that prolonged stress results in glucocorticoid receptor resistance (GCR), which results in a dysfunctional stress-immunity interaction, and, in turn, interferes with appropriate regulation of inflammation. The hypothalamic-pituitary-adrenal (HPA) axis and the sympathetic-adrenomedullary system are the two major peripheral components of […]
Evolving Concepts Recently, more than 10 studies [see References 1-11], published in the last 3-4 years indicate the presence of high intratumoral concentrations of catecholamines and that these neurohormonal mediators affect key components of tumor biology such as tumor growth, angiogenesis, and migration or invasion [for details see References 12-13]. These studies suggest that blocking […]