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Cell Immunol ; 361: 104285, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33484943

RESUMO

Myeloid derived suppressor cells (MDSCs) are a diverse collection of immune cells that suppress anti-tumor immune responses. Decreasing MDSCs accumulation in the tumor microenvironment could improve the anti-tumor immune response and improve immunotherapy. Here, we examine the impact of physiologically relevant thermal treatments on the accumulation of MDSCs in tumors in mice. We found that different temperature-based protocols, including 1) weekly whole-body hyperthermia, 2) housing mice at their thermoneutral temperature (TT, ~30 °C), and 3) housing mice at a subthermoneutral temperature (ST,~22 °C) while providing a localized heat source, each resulted in a reduction in MDSC accumulation and improved tumor growth control compared to control mice housed at ST, which is the standard, mandated housing temperature for laboratory mice. Additionally, we found that low dose ß-adrenergic receptor blocker (propranolol) therapy reduced MDSC accumulation and improved tumor growth control to a similar degree as the models that relieved cold stress. These results show that thermal treatments can decrease MDSC accumulation and tumor growth comparable to propranolol therapy.


Assuntos
Temperatura Alta/uso terapêutico , Células Supressoras Mieloides/imunologia , Neoplasias/imunologia , Antagonistas Adrenérgicos beta/farmacologia , Animais , Linhagem Celular Tumoral , Feminino , Resposta ao Choque Térmico/fisiologia , Calefação/métodos , Hipertermia Induzida/métodos , Imunoterapia/métodos , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Células Supressoras Mieloides/metabolismo , Células Supressoras Mieloides/fisiologia , Microambiente Tumoral/imunologia
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