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Elmajee M, Osman K, Dermanis A, Duffaydar H, Soon WC, czyz M. A literature Review: The genomic landscape of spinal chondrosarcoma and potential diagnostic, prognostic & therapeutic implications. INTERDISCIPLINARY NEUROSURGERY 2022. [DOI: 10.1016/j.inat.2022.101651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Qi W, Rosikiewicz W, Yin Z, Xu B, Jiang H, Wan S, Fan Y, Wu G, Wang L. Genomic profiling identifies genes and pathways dysregulated by HEY1-NCOA2 fusion and shines a light on mesenchymal chondrosarcoma tumorigenesis. J Pathol 2022; 257:579-592. [PMID: 35342947 PMCID: PMC9539848 DOI: 10.1002/path.5899] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 02/09/2022] [Accepted: 03/23/2022] [Indexed: 11/25/2022]
Abstract
Mesenchymal chondrosarcoma is a rare, high‐grade, primitive mesenchymal tumor. It accounts for around 2–10% of all chondrosarcomas and mainly affects adolescents and young adults. We previously described the HEY1–NCOA2 as a recurrent gene fusion in mesenchymal chondrosarcoma, an important breakthrough for characterizing this disease; however, little study had been done to characterize the fusion protein functionally, in large part due to a lack of suitable models for evaluating the impact of HEY1–NCOA2 expression in the appropriate cellular context. We used iPSC‐derived mesenchymal stem cells (iPSC‐MSCs), which can differentiate into chondrocytes, and generated stable transduced iPSC‐MSCs with inducible expression of HEY1–NCOA2 fusion protein, wildtype HEY1 or wildtype NCOA2. We next comprehensively analyzed both the DNA binding properties and transcriptional impact of HEY1–NCOA2 expression by integrating genome‐wide chromatin immunoprecipitation sequencing (ChIP‐seq) and expression profiling (RNA‐seq). We demonstrated that HEY1–NCOA2 fusion protein preferentially binds to promoter regions of canonical HEY1 targets, resulting in transactivation of HEY1 targets, and significantly enhances cell proliferation. Intriguingly, we identified that both PDGFB and PDGFRA were directly targeted and upregulated by HEY1‐NCOA2; and the fusion protein, but not wildtype HEY1 or NCOA2, dramatically increased the level of phospho‐AKT (Ser473). Our findings provide a rationale for exploring PDGF/PI3K/AKT inhibition in treating mesenchymal chondrosarcoma. © 2022 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of The Pathological Society of Great Britain and Ireland.
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Affiliation(s)
- Wenqing Qi
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Wojciech Rosikiewicz
- Center for Applied Bioinformatics, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Zhaohong Yin
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Beisi Xu
- Center for Applied Bioinformatics, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Huihong Jiang
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Shibiao Wan
- Center for Applied Bioinformatics, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Yiping Fan
- Center for Applied Bioinformatics, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Gang Wu
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, United States.,Center for Applied Bioinformatics, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Lu Wang
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, United States
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