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Rajesh Y, Biswas A, Banik P, Pal I, Das S, Borkar SA, Sardana H, Saha A, Das SK, Emdad L, Fisher PB, Mandal M. Transcriptional regulation of HSPB1 by Friend leukemia integration-1 factor modulates radiation and temozolomide resistance in glioblastoma. Oncotarget 2020; 11:1097-1108. [PMID: 32284788 PMCID: PMC7138161 DOI: 10.18632/oncotarget.27425] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 12/21/2019] [Indexed: 02/02/2023] Open
Abstract
Glioblastoma (GBM) is the most common primary brain tumor and is invariably fatal. Heat shock proteins (HSPs) provide protein signatures/biomarkers for GBM that afford potential as targets for developing anti-GBM drugs. In GBM, elevated expression of hypoxia inducible factors under the influence of Ets family proteins significantly promotes the expression of HSPs. RNAseq analysis identified HSPB1 as a prominent upregulated HSP in GBM and in radiation resistant/temozolomide resistant (radio/TMZR) GBM. Here, we established friend leukemia integration 1 (Fli-1), a member of Ets family to be playing a transcriptional regulatory role on the HSPB1 gene. Fli-1 binds to nucleotide residues GGAA at binding sites 3, 6 and 7 in the 5-kb upstream region of HSPB1. Fli-1 has been linked to oncogenic transformation with upregulation in radio/TMZR GBM. Overexpression of Fli-1 in GBM promotes resistance, whereas Fli-1 knockdown in radio/TMZR GBM cells suppresses resistance. We identify the underlying molecular mechanisms of Fli-1-mediated regulation of HSPB1 that drive extracellular matrix remodeling and epithelial to mesenchymal transition in radio/TMZR GBM cells. This study uncovers Fli-1 as a potential therapeutic target for combating radiation and temozolomide resistance in GBM.
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Affiliation(s)
- Yetirajam Rajesh
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Angana Biswas
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Payel Banik
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Ipsita Pal
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Subhayan Das
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Sachin A Borkar
- Department of Neurosurgery & Gamma Knife, All India Institute of Medical Sciences, New Delhi, India
| | - Hardik Sardana
- Department of Neurosurgery & Gamma Knife, All India Institute of Medical Sciences, New Delhi, India
| | - Abhijit Saha
- Radiation Department, UGC DAE Consortium, Jadavpur University, Kolkata, India
| | - Swadesh K Das
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA.,VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA.,VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA
| | - Luni Emdad
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA.,VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA.,VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA
| | - Paul B Fisher
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA.,VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA.,VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA
| | - Mahitosh Mandal
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, India.,Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA.,VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA
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