HSP70 In triple negative breast cancer: Prognostic value and clinical significance

乳腺癌 FOXP3型 三阴性乳腺癌 肿瘤浸润淋巴细胞 CD8型 免疫系统 免疫组织化学 雌激素受体 热休克蛋白70 医学 肿瘤微环境 癌症研究 肿瘤科 热休克蛋白 内科学 病理 癌症 生物 免疫学 生物化学 基因
作者
Ana Car Peterko,Koraljka Rajković Molek,Tamara Gulić,Danijela Veljković Vujaklija,Ingrid Belac Lovasić,Franjo Lovasić,Elvira Mustać,Manuela Avirović
出处
期刊:Pathology Research and Practice [Elsevier]
卷期号:238: 154127-154127 被引量:1
标识
DOI:10.1016/j.prp.2022.154127
摘要

Triple-negative breast cancer (TNBC) has the worst prognosis and the highest immunogenic potential of all breast cancer subtypes. It is characterized by a lack of estrogen and progesterone receptors as well as HER2. A major component of the tumor microenvironment (TME) of TNBC is tumor-infiltrating lymphocytes (TILs). A chaperone heat shock protein 70 (HSP70) is involved in several pathways that enable tumour growth and progression, as well as in immune modulation.Immunohistochemical analysis of HSP70 expression in immune cells, as well as expression of immunosuppressive markers CTLA4 and PD-L1 and major TILs components: CD8, CD4 and Tregs were analyzed in the superficial and deep tumor layer of primary TNBC and compared with established clinicopathological parameters. Clinical data and surgical tissue samples from 68 TNBC patients who underwent initial surgery were included in the analysis and 36 control samples from benign breast tissue biopsies.A higher expression of TILs, CD4, CD8 and PD-L1 was found in the invasive tumor front (ITF), as compared to the tumor center (TC) (p < 0001). HSP70 positive immune cells (HSP70(+) IC) in TC were associated with adverse clinical and pathological markers: higher stage of disease (P = 0.013), higher grade (P = 0.05) and a higher pN status (P < 0.001). In addition, higher expression of HSP70(+) IC from TC was correlated with the higher expression of FOXP3(+)T cells both in ITF (N = 61, rho=0.42, p < 0.001) and in metastatic tissue from the draining lymph nodes (N = 13, rho=0.61, P = 0.026).Correlations between HSP70 immune cells expression and individual TILs components support the hypothesis of its active role in inducing immunosuppression and tumor progression. Routine determination of HSP70 expression, in immune cells of TC, may be of added value in the clinical decision-making process concerning axillary surgery.
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