Immunogenic Cell Death of Breast Cancer Stem Cells Induced by an Endoplasmic Reticulum-Targeting Copper(II) Complex.
Immunogenic Cell Death of Breast Cancer Stem Cells Induced by an Endoplasmic Reticulum-Targeting Copper(II) Complex.
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DOI:
10.1002/cbic.202000553
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发表时间:
2020-12-11
期刊:
影响因子:
--
通讯作者:
Suntharalingam K
中科院分区:
文献类型:
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作者:
Kaur P;Johnson A;Northcote-Smith J;Lu C;Suntharalingam K
Immunogenic cell death (ICD) offers a method of stimulating the immune system to attack and remove cancer cells. We report a copper(II) complex containing a Schiff base ligand and a polypyridyl ligand, 4, capable of inducing ICD in breast cancer stem cells (CSCs). Complex 4 kills both bulk breast cancer cells and breast CSCs at sub‐micromolar concentrations. Notably, 4 exhibits greater potency (one order of magnitude) towards breast CSCs than salinomycin (an established breast CSC‐potent agent) and cisplatin (a clinically approved anticancer drug). Epithelial spheroid studies show that 4 is able to selectively inhibit breast CSC‐enriched HMLER‐shEcad spheroid formation and viability over non‐tumorigenic breast MCF10 A spheroids. Mechanistic studies show that 4 operates as a Type II ICD inducer. Specifically, 4 readily enters the endoplasmic reticulum (ER) of breast CSCs, elevates intracellular reactive oxygen species (ROS) levels, induces ER stress, evokes damage‐associated molecular patterns (DAMPs), and promotes breast CSC phagocytosis by macrophages. As far as we are aware, 4 is the first metal complex to induce ICD in breast CSCs and promote their engulfment by immune cells. Find me, eat me: Cancer stem cells (CSCs) are heavily linked to patient relapse, so targeting them could improve treatment. One method of inducing a tumour‐targeting immune response is immunogenic cell death (ICD), in which dying cancer cells stimulate tumour‐associated immune cells to seek and remove them. Here we report the first metal complex to induce ICD in CSCs.
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DOI:
--
发表时间:
2020-02-01
期刊:
哲学分析
影响因子:
--
作者:
马迎辉
通讯作者:
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