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Epigenetic Regulation in Breast Cancer Tumor Microenvironment

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Cancer Epigenetics

Part of the book series: Epigenetics and Human Health ((EHH,volume 11))

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Abstract

Breast cancer is an exceedingly complex disease that is driven by multiple factors and aberrantly regulated pathways. Mounting evidence suggests that the aggressive nature of breast cancer is highly influenced by its microenvironment, called the tumor microenvironment (TME). Bidirectional cross talk between the cancer cells and the cells of the immune system helps in the reshaping of the TME into an immunosuppressive and pro-tumorigenic milieu through a process called tumor immunoediting. However, the molecular mechanisms underlying the plasticity of TME have not been thoroughly explored. Recent studies have shown the participation of epigenetic dysregulation, such as DNA methylation, histone modifications, and ncRNA-mediated gene silencing, in the regulation of the plastic nature of the TME. Thus, in order to obtain a better clinical response, altering epigenetics in conjunction with immunotherapy may be a potential therapeutic strategy. This chapter reviews the role of various innate and adaptive immune cells in breast cancer TME and how epigenetics modifications drive this immunosuppression. We also summarize the effects of epigenetic modulators on the TME and the potential of these epigenetic modulators to improve the prognosis of breast cancer patients.

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Abbreviations

ADCC:

Antibody-dependent cell-mediated cytotoxicity

APCs :

Antigen-presenting cells

CAFs:

Cancer-associated fibroblasts

DCs:

Dendritic cells

ECM:

Extracellular matrix

EMT:

Epithelial to mesenchymal transition

HCC:

Hepatocellular carcinoma

MDSCs:

Myeloid-derived suppressor cells

MHC-II:

Major histocompatibility complex class II

snRNA:

Small nuclear ribonucleic acid RNA

TAM:

Tumor-associated macrophage

TGF-β:

Transforming growth factor-β

TME:

Tumor microenvironment

TNBC :

Triple-negative breast cancer

VEGF :

Vascular endothelial growth factor

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Acknowledgments

BK and PM acknowledge research fellowships from the CSIR and UGC, Government of India, respectively. We thank the Director, CSIR-CFTRI, Mysore, India, for providing all the required facilities.

Funding

The work was supported by CSIR-FIRST grant, MLP-0299.

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The authors declare that they have no conflict of interest.

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Correspondence to Syed Musthapa Meeran .

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Kaur, B., Mondal, P., Meeran, S.M. (2023). Epigenetic Regulation in Breast Cancer Tumor Microenvironment. In: Kalkan, R. (eds) Cancer Epigenetics. Epigenetics and Human Health, vol 11. Springer, Cham. https://doi.org/10.1007/978-3-031-42365-9_6

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