Background: The high mutation burden of triple-negative breast cancer (TNBC) is related to its immunogenic potential. The presence of tumour infiltrating lymphocytes (TILs) in the preclinical stage of disease reflects a proinflammatory immune response against cancer cells. However, cancer cells may modulate it to support tumour growth and progression. A chaperone HSP70 molecule expression, upregulated by oncogenic signalling, supports the formation of early-stage breast cancer (BC) as well. Moreover, in the later course of the disease, HSP70 is actively released by the cancer cells and can induce the termination of the specific immune response. The aim of this study was to explore the role and possible predictive value of the HSP70(+) immune cells in a deep layer (HSP70-IC-DL) of TNBC.
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