4.5 Review

CAF-immune cell crosstalk and its impact in immunotherapy

期刊

SEMINARS IN IMMUNOPATHOLOGY
卷 45, 期 2, 页码 203-214

出版社

SPRINGER HEIDELBERG
DOI: 10.1007/s00281-022-00977-x

关键词

Cancer-associated fibroblasts (CAFs); Tumour microenvironment (TME); T cells; Immunotherapy; Resistance

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Tumour cells interact with the surrounding microenvironment, including immune cells and cancer-associated fibroblasts (CAFs), which play a crucial role in tumour progression and therapy response. Understanding the complexity of CAFs and their interaction with immune cells is essential for improving treatment outcomes and developing predictive biomarkers.
Tumour cells do not exist as isolated entities. Instead, they are surrounded by a variety of cells and extracellular matrix, which form the tumour microenvironment (TME). The interaction between cancer cells and their microenvironment is increasingly acknowledged as essential in dictating the outcome of the patients. The TME includes everything that surrounds tumour cells and is often highjacked by the latter to promote their growth, invasion, and immune escape. Immune cells and cancer-associated fibroblasts (CAFs) are essential components of the TME, and there is increasing evidence that their interaction constitutes a major player not only for tumour progression but also for therapy response.Recent work in the field of immuno-oncology resulted in the development of novel therapies that aim at activating immune cells against cancer cells to eliminate them. Despite their unprecedented success, the lack of response from a large portion of patients highlights the need for further progress and improvement. To achieve its ultimate goal, the interaction between cancer cells and the TME needs to be studied in-depth to allow the targeting of mechanisms that are involved in resistance or refractoriness to therapy. Moreover, predictive and prognostic biomarkers for patient stratification are still missing. In this review, we focus on and highlight the complexity of CAFs within the TME and how their interaction, particularly with immune cells, can contribute to treatment failure. We further discuss how this crosstalk can be further dissected and which strategies are currently used to target them.

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