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Tocilizumab potentiates cisplatin cytotoxicity and targets cancer stem cells in triple-negative breast cancer.
Molecular Carcinogenesis ( IF 4.6 ) Pub Date : 2020-06-14 , DOI: 10.1002/mc.23234
Noura N Alraouji 1 , Falah H Al-Mohanna 2 , Hazem Ghebeh 3 , Maria Arafah 4 , Rafa Almeer 5 , Taher Al-Tweigeri 6 , Abdelilah Aboussekhra 1
Affiliation  

Triple‐negative breast cancer (TNBC) is a very aggressive subtype with high recurrence rate and no molecular targets for therapies. This subtype is characterized by high expression/secretion of the proinvasive/metastatic interleukin‐6 (IL‐6) cytokine. In the present study, we have shown that tocilizumab inhibits the IL‐6/STAT3 signaling and suppresses the cancer/inflammatory epigenetic IL‐6/STAT3/NF‐κB positive feedback loop. Furthermore, tocilizumab inhibited the proliferative and the migratory/invasiveness capacities as well as the epithelial‐to‐mesenchymal transition (EMT) process in TNBC cells. Importantly, tocilizumab suppressed the stemness‐related characteristics of TNBC cells, through the inhibition of the Wnt/β‐catenin breast cancer stem cell‐related pathway. Additionally, we have shown that tocilizumab suppresses the paracrine activation of normal breast stromal fibroblasts to myofibroblats. Moreover, tocilizumab sensitized TNBC cells to the cytotoxic effect of cisplatin in vitro. Furthermore, pharmacological inhibition of IL‐6 by tocilizumab had great inhibitory effect on tumor growth and the EMT process in humanized orthotopic breast tumors in mice. In addition, tocilizumab potentiated the proapoptotic effect of cisplatin in humanized breast tumors. Together, these findings indicate that tocilizumab can suppress the prometastatic capacity of TNBC cells and enhances the cytotoxic effect of cisplatin against these cells. Therefore, tocilizumab could be of great therapeutic value for these hard‐to‐treat TNBC patients.

中文翻译:

Tocilizumab增强顺铂细胞毒性,并靶向三阴性乳腺癌中的癌症干细胞。

三阴性乳腺癌(TNBC)是一种非常具有侵略性的亚型,复发率高,并且没有治疗的分子靶标。该亚型的特征是侵袭性/转移性白介素-6(IL-6)细胞因子的高表达/分泌。在本研究中,我们显示了托珠单抗抑制IL-6 / STAT3信号传导并抑制癌症/炎症性表观遗传IL-6 / STAT3 /NF-κB阳性反馈回路。此外,托珠单抗抑制TNBC细胞的增殖和迁移/侵袭能力以及上皮-间质转化(EMT)过程。重要的是,托西珠单抗通过抑制Wnt /β-catenin乳腺癌干细胞相关途径来抑制TNBC细胞的干性相关特征。另外,我们已经证明托珠单抗抑制正常乳腺基质成纤维细胞向肌原纤维生成的旁分泌激活。此外,托珠单抗在体外使TNBC细胞对顺铂的细胞毒性作用敏感。此外,托珠单抗对IL-6的药理抑制作用对人源化原位乳腺肿瘤的小鼠肿瘤生长和EMT过程具有极大的抑制作用。此外,托珠单抗增强了顺铂在人源化乳腺肿瘤中的促凋亡作用。总之,这些发现表明托珠单抗可以抑制TNBC细胞的转移能力,并增强顺铂对这些细胞的细胞毒性作用。因此,托西珠单抗对这些难以治疗的TNBC患者具有巨大的治疗价值。Tocilizumab在体外使TNBC细胞对顺铂的细胞毒性作用敏感。此外,托珠单抗对IL-6的药理学抑制作用对人源化原位乳腺肿瘤小鼠的肿瘤生长和EMT过程具有极大的抑制作用。此外,托珠单抗增强了顺铂在人源化乳腺肿瘤中的促凋亡作用。总之,这些发现表明托珠单抗可以抑制TNBC细胞的转移能力,并增强顺铂对这些细胞的细胞毒性作用。因此,托珠单抗对这些难治性TNBC患者具有巨大的治疗价值。Tocilizumab在体外使TNBC细胞对顺铂的细胞毒性作用敏感。此外,托珠单抗对IL-6的药理学抑制作用对人源化原位乳腺肿瘤小鼠的肿瘤生长和EMT过程具有极大的抑制作用。此外,托珠单抗增强了顺铂在人源化乳腺肿瘤中的促凋亡作用。总之,这些发现表明托珠单抗可以抑制TNBC细胞的转移能力,并增强顺铂对这些细胞的细胞毒性作用。因此,托西珠单抗对这些难以治疗的TNBC患者具有巨大的治疗价值。托珠单抗增强了顺铂在人源化乳腺肿瘤中的促凋亡作用。总之,这些发现表明托珠单抗可以抑制TNBC细胞的转移能力,并增强顺铂对这些细胞的细胞毒性作用。因此,托珠单抗对这些难治性TNBC患者具有巨大的治疗价值。托珠单抗增强了顺铂在人源化乳腺肿瘤中的促凋亡作用。总之,这些发现表明托珠单抗可以抑制TNBC细胞的转移能力,并增强顺铂对这些细胞的细胞毒性作用。因此,托珠单抗对这些难治性TNBC患者具有巨大的治疗价值。
更新日期:2020-08-03
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