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Tumor infiltrating lymphocytes (TILs) against solid tumors: Current trends & perspectives

molecular-biology
immunology
oncology
translational-medicine
synthetic-biology

Abstract

Tumor-infiltrating lymphocytes (TILs) are recognized as a key component of anticancer immunity and serve as an important prognostic factor in cancer progression. In this review, the latest updates and perspectives on the diverse populations of TILs and their roles in cancer immunity are discussed. The presence and balance between anti-tumorigenic and pro-tumorigenic immune cells in the tumor microenvironment (TME) largely determine tumor progression and fate. Thus, the properties of TILs were reviewed to provide a better insight into the roles of these immune cells within the TME. Additionally, the different factors influencing immune cell infiltration in solid tumors are also described, with the aim of suggesting novel immunotherapeutic approaches for improved TIL infiltration. These recent approaches are then summarised as recommendations to improve infiltration and potentially achieve better clinical outcomes. Overall, this review highlights the critical role of TILs, factors governing immune cell homing and infiltration, and strategic approaches to improve TIL infiltration.
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