1. Altered expression of autophagy-related genes might contribute to glucocorticoid resistance in precursor B-cell-type acute lymphoblastic leukemia.
- Author
-
Sarang Z, Gyurina K, Scholtz B, Kiss C, and Szegedi I
- Subjects
- Antineoplastic Agents pharmacology, Antineoplastic Combined Chemotherapy Protocols adverse effects, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Cell Line, Tumor, Cluster Analysis, Computational Biology methods, Databases, Nucleic Acid, Gene Expression Profiling, Glucocorticoids pharmacology, Humans, Antineoplastic Agents therapeutic use, Autophagy genetics, Drug Resistance, Neoplasm genetics, Gene Expression Regulation, Neoplastic, Glucocorticoids therapeutic use, Precursor B-Cell Lymphoblastic Leukemia-Lymphoma drug therapy, Precursor B-Cell Lymphoblastic Leukemia-Lymphoma genetics
- Abstract
Objectives: Autophagy is an evolutionarily conserved process playing an important role in tumor cell's resistance to chemotherapy. Response to glucocorticoid (GC) treatment is out of the most important prognostic factors in childhood acute lymphoblastic leukemia (ALL); however, only few data are available connecting GC response and role of autophagy. Our aim was to investigate whether altered expression of autophagy-related genes contributes to GC-resistant phenotype in GC-sensitive and GC-resistant precursor B-cell-type (PBC) ALL cells., Methods: Gene expression data were obtained from public database for 26 children diagnosed with PBC ALL either sensitive or resistant to in vitro prednisolone treatment., Results: We have identified 36 autophagy-associated genes which were differently expressed, based on at least a twofold difference, GC-sensitive group as compared to GC-resistant one. Of the 36 genes, 10 were downregulated and 26 upregulated in the GC-resistant group. The average fold change values for the decreased and increased transcripts were -4.57 and 2.67, respectively., Conclusions: Our data imply that GC sensitivity might depend on the expression of several genes involved in regulation and execution of autophagy in a way that key autophagy inducers are downregulated while inhibitors of autophagy are upregulated in GC-resistant cells., (© 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)
- Published
- 2016
- Full Text
- View/download PDF