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Dasgupta A, Chen KH, Wu D, Hoskin V, Mewburn J, Lima PDA, Parlow LRG, Hindmarch CCT, Martin A, Sykes EA, Tayade C, Lightbody ED, Madarnas Y, SenGupta SK, Elliott BE, Nicol CJB, Archer SL. An epigenetic increase in mitochondrial fission by MiD49 and MiD51 regulates the cell cycle in cancer: Diagnostic and therapeutic implications. FASEB J 2020; 34:5106-5127. [PMID: 32068312 DOI: 10.1096/fj.201903117r] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/23/2020] [Accepted: 01/27/2020] [Indexed: 12/17/2022]
Abstract
Excessive proliferation and apoptosis-resistance are hallmarks of cancer. Increased dynamin-related protein 1 (Drp1)-mediated mitochondrial fission is one of the mediators of this phenotype. Mitochondrial fission that accompanies the nuclear division is called mitotic fission and occurs when activated Drp1 binds partner proteins on the outer mitochondrial membrane. We examine the role of Drp1-binding partners, mitochondrial dynamics protein of 49 and 51 kDa (MiD49 and MiD51), as drivers of cell proliferation and apoptosis-resistance in non-small cell lung cancer (NSCLC) and invasive breast carcinoma (IBC). We also evaluate whether inhibiting MiDs can be therapeutically exploited to regress cancer. We show that MiD levels are pathologically elevated in NSCLC and IBC by an epigenetic mechanism (decreased microRNA-34a-3p expression). MiDs silencing causes cell cycle arrest through (a) increased expression of cell cycle inhibitors, p27Kip1 and p21Waf1 , (b) inhibition of Drp1, and (c) inhibition of the Akt-mTOR-p70S6K pathway. Silencing MiDs leads to mitochondrial fusion, cell cycle arrest, increased apoptosis, and tumor regression in a xenotransplant NSCLC model. There are positive correlations between MiD expression and tumor size and grade in breast cancer patients and inverse correlations with survival in NSCLC patients. The microRNA-34a-3p-MiDs axis is important to cancer pathogenesis and constitutes a new therapeutic target.
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Affiliation(s)
- Asish Dasgupta
- Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Kuang-Hueih Chen
- Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Danchen Wu
- Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Victoria Hoskin
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, ON, Canada
| | - Jeffrey Mewburn
- Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Patricia D A Lima
- Queen's Cardiopulmonary Unit (QCPU), Translational Institute of Medicine (TIME), Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Leah R G Parlow
- Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Charles C T Hindmarch
- Queen's Cardiopulmonary Unit (QCPU), Translational Institute of Medicine (TIME), Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Ashley Martin
- Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Edward A Sykes
- Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Chandrakant Tayade
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Elizabeth D Lightbody
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, ON, Canada
| | | | - Sandip K SenGupta
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, ON, Canada.,Kingston Health Sciences Centre, Kingston, ON, Canada
| | - Bruce E Elliott
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, ON, Canada
| | - Christopher J B Nicol
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, ON, Canada.,Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Stephen L Archer
- Department of Medicine, Queen's University, Kingston, ON, Canada
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