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Foster H, Ruiz EJ, Moore C, Stamp GWH, Nye EL, Li N, Pan Y, He Y, Downward J, Behrens A. ATMIN Is a Tumor Suppressor Gene in Lung Adenocarcinoma. Cancer Res 2019; 79:5159-5166. [PMID: 31481498 PMCID: PMC6797498 DOI: 10.1158/0008-5472.can-19-0647] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 07/09/2019] [Accepted: 08/26/2019] [Indexed: 12/22/2022]
Abstract
Tumor cells proliferate rapidly and thus are frequently subjected to replication stress and the risk of incomplete duplication of the genome. Fragile sites are replicated late, making them more vulnerable to damage when DNA replication fails to complete. Therefore, genomic alterations at fragile sites are commonly observed in tumors. FRA16D is one of the most common fragile sites in lung cancer, however, the nature of the tumor suppressor genes affected by FRA16D alterations has been controversial. Here, we show that the ATMIN gene, which encodes a cofactor required for activation of ATM kinase by replication stress, is located close to FRA16D and is commonly lost in lung adenocarcinoma. Low ATMIN expression was frequently observed in human lung adenocarcinoma tumors and was associated with reduced patient survival, suggesting that ATMIN functions as a tumor suppressor in lung adenocarcinoma. Heterozygous Atmin deletion significantly increased tumor cell proliferation, tumor burden, and tumor grade in the LSL-KRasG12D; Trp53 F/F (KP) mouse model of lung adenocarcinoma, identifying ATMIN as a haploinsufficient tumor suppressor. ATMIN-deficient KP lung tumor cells showed increased survival in response to replication stress and consequently accumulated DNA damage. Thus, our data identify ATMIN as a key gene affected by genomic deletions at FRA16D in lung adenocarcinoma. SIGNIFICANCE: These findings identify ATMIN as a tumor suppressor in LUAD; fragility at chr16q23 correlates with loss of ATMIN in human LUAD and deletion of Atmin increases tumor burden in a LUAD mouse model.
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Affiliation(s)
- Hanna Foster
- Adult Stem Cell Laboratory, The Francis Crick Institute, London, United Kingdom
- Tomas Lindahl Nobel Laureate Laboratory, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - E Josue Ruiz
- Adult Stem Cell Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Christopher Moore
- Oncogene Biology Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Gordon W H Stamp
- Experimental Histopathology Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Emma L Nye
- Experimental Histopathology Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Ningning Li
- Adult Stem Cell Laboratory, The Francis Crick Institute, London, United Kingdom
- Tomas Lindahl Nobel Laureate Laboratory, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Yihang Pan
- Tomas Lindahl Nobel Laureate Laboratory, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Yulong He
- Tomas Lindahl Nobel Laureate Laboratory, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Julian Downward
- Oncogene Biology Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Axel Behrens
- Adult Stem Cell Laboratory, The Francis Crick Institute, London, United Kingdom.
- School of Medicine, King's College London, Guy's Campus, London, United Kingdom
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Sarni D, Kerem B. The complex nature of fragile site plasticity and its importance in cancer. Curr Opin Cell Biol 2016; 40:131-136. [PMID: 27062332 DOI: 10.1016/j.ceb.2016.03.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 03/21/2016] [Accepted: 03/28/2016] [Indexed: 01/12/2023]
Abstract
Common fragile sites (CFSs) are chromosomal regions characterized as hotspots for breakage and chromosomal rearrangements following DNA replication stress. They are preferentially unstable in pre-cancerous lesions and during cancer development. Recently CFSs were found to be tissue- and even oncogene-induced specific, thus indicating an unforeseen complexity. Here we review recent developments in CFS research that shed new light on the molecular basis of their instability and their importance in cancer development.
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Affiliation(s)
- Dan Sarni
- Department of Genetics, The Life Sciences Institute, The Hebrew University, Jerusalem 91904, Israel
| | - Batsheva Kerem
- Department of Genetics, The Life Sciences Institute, The Hebrew University, Jerusalem 91904, Israel.
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