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Busiello T, Ciano M, Romano S, Sodaro G, Garofalo O, Bruzzese D, Simeone L, Chiurazzi F, Fiammetta Romano M, Costanzo P, Cesaro E. Role of ZNF224 in cell growth and chemoresistance of chronic lymphocitic leukemia. Hum Mol Genet 2017; 26:344-353. [PMID: 28040726 DOI: 10.1093/hmg/ddw427] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 12/15/2016] [Indexed: 11/13/2022] Open
Abstract
Chronic lymphocytic leukaemia (CLL) is associated with apoptosis resistance and defective control of cell growth. Our study describes for the first time a critical role in CLL for the KRAB-zinc finger protein ZNF224. High ZNF224 transcript levels were detected in CLL patients with respect to control cells. Moreover, ZNF224 expression was significantly lowered after conventional chemotherapy treatment in a subset of CLL patients. By in vitro experiments we confirmed that ZNF224 expression is suppressed by fludarabine and demonstrated that ZNF224 is involved in apoptosis resistance in CLL cells. Moreover, we showed that ZNF224 positively modulates cyclin D3 gene expression. Consistently, we observed that alteration of ZNF224 expression leads to defects in cell cycle control. All together, our results strongly suggest that in CLL cells high expression level of ZNF224 can lead to inappropriate cell growth and apoptosis resistance, thus contributing to CLL progression. Targeting ZNF224 could thus improve CLL response to therapy.
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Affiliation(s)
- Teresa Busiello
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Via Pansini 5 80131, Naples, Italy
| | - Michela Ciano
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Via Pansini 5 80131, Naples, Italy
| | - Simona Romano
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Via Pansini 5 80131, Naples, Italy
| | - Gaetano Sodaro
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Via Pansini 5 80131, Naples, Italy
| | - Olgavalentina Garofalo
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Via Pansini 5 80131, Naples, Italy
| | - Dario Bruzzese
- Department of Public Health, University of Naples Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Luigia Simeone
- Division of Hematology, Department of Clinical and Experimental Medicine, University of Naples Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Federico Chiurazzi
- Division of Hematology, Department of Clinical and Experimental Medicine, University of Naples Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Maria Fiammetta Romano
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Via Pansini 5 80131, Naples, Italy
| | - Paola Costanzo
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Via Pansini 5 80131, Naples, Italy
| | - Elena Cesaro
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Via Pansini 5 80131, Naples, Italy
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