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Mitochondrial Impairment by MitoBloCK-6 Inhibits Liver Cancer Cell Proliferation.


ABSTRACT: Augmenter of liver regeneration (ALR) is a critical multi-isoform protein with its longer isoform, located in the mitochondrial intermembrane space, being part of the mitochondrial disulfide relay system (DRS). Upregulation of ALR was observed in multiple forms of cancer, among them hepatocellular carcinoma (HCC). To shed light into ALR function in HCC, we used MitoBloCK-6 to pharmacologically inhibit ALR, resulting in profound mitochondrial impairment and cancer cell proliferation deficits. These effects were mostly reversed by supplementation with bioavailable hemin b, linking ALR function to mitochondrial iron homeostasis. Since many tumor cells are known for their increased iron demand and since increased iron levels in cancer are associated with poor clinical outcome, these results help to further advance the intricate relation between iron and mitochondrial homeostasis in liver cancer.

SUBMITTER: Kabiri Y 

PROVIDER: S-EPMC8488156 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature

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Mitochondrial Impairment by MitoBloCK-6 Inhibits Liver Cancer Cell Proliferation.

Kabiri Yaschar Y   Fuhrmann Anna A   Becker Anna A   Jedermann Luisa L   Eberhagen Carola C   König Ann-Christine AC   Silva Tiago Barros TB   Borges Fernanda F   Hauck Stefanie M SM   Michalke Bernhard B   Knolle Percy P   Zischka Hans H  

Frontiers in cell and developmental biology 20210920


Augmenter of liver regeneration (ALR) is a critical multi-isoform protein with its longer isoform, located in the mitochondrial intermembrane space, being part of the mitochondrial disulfide relay system (DRS). Upregulation of <i>ALR</i> was observed in multiple forms of cancer, among them hepatocellular carcinoma (HCC). To shed light into ALR function in HCC, we used MitoBloCK-6 to pharmacologically inhibit ALR, resulting in profound mitochondrial impairment and cancer cell proliferation defici  ...[more]

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