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Mol Oncol. 2019 May;13(5):1180-1195. doi: 10.1002/1878-0261.12476. Epub 2019 Apr 5.

Targeting the thioredoxin system as a novel strategy against B-cell acute lymphoblastic leukemia.

Author information

1
Department of Immunology, Medical University of Warsaw, Poland.
2
Postgraduate School of Molecular Medicine, Medical University of Warsaw, Poland.
3
Department of Pediatrics, Oncology, Hematology and Diabetology, Medical University of Lodz, Poland.
4
Department of Biostatistics and Translational Medicine, Medical University of Lodz, Poland.
5
Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, MA, USA.
6
Centre for Health Protection, National Institute for Public Health and the Environment, Bilthoven, The Netherlands.
7
Institute of Hematology and Transfusion Medicine, Warsaw, Poland.
8
Centre of Postgraduate Medical Education, Warsaw, Poland.
9
Newcastle Cancer Centre at the Northern Institute for Cancer Research, Newcastle University, Newcastle upon Tyne, UK.
10
Department of Immunology, Transplantology and Internal Diseases, Medical University of Warsaw, Poland.
11
Department of Orthopaedics and Traumatology, Medical University of Warsaw, Poland.
12
Department of Laboratory Diagnostics and Clinical Immunology of Developmental Age, Medical University of Warsaw, Poland.
13
Department of Pediatrics, Hematology and Oncology, Medical University of Warsaw, Poland.
14
Centre for Preclinical Research and Technology, Medical University of Warsaw, Poland.

Abstract

B-cell precursor acute lymphoblastic leukemia (BCP-ALL) is a genetically heterogeneous blood cancer characterized by abnormal expansion of immature B cells. Although intensive chemotherapy provides high cure rates in a majority of patients, subtypes harboring certain genetic lesions, such as MLL rearrangements or BCR-ABL1 fusion, remain clinically challenging, necessitating a search for other therapeutic approaches. Herein, we aimed to validate antioxidant enzymes of the thioredoxin system as potential therapeutic targets in BCP-ALL. We observed oxidative stress along with aberrant expression of the enzymes associated with the activity of thioredoxin antioxidant system in BCP-ALL cells. Moreover, we found that auranofin and adenanthin, inhibitors of the thioredoxin system antioxidant enzymes, effectively kill BCP-ALL cell lines and pediatric and adult BCP-ALL primary cells, including primary cells cocultured with bone marrow-derived stem cells. Furthermore, auranofin delayed the progression of leukemia in MLL-rearranged patient-derived xenograft model and prolonged the survival of leukemic NSG mice. Our results unveil the thioredoxin system as a novel target for BCP-ALL therapy, and indicate that further studies assessing the anticancer efficacy of combinations of thioredoxin system inhibitors with conventional anti-BCP-ALL drugs should be continued.

KEYWORDS:

ALL; antioxidant enzymes; leukemia; oxidative stress; peroxiredoxin; thioredoxin

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