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Barajas JM, Umeda M, Contreras L, Khanlari M, Westover T, Walsh MP, Xiong E, Yang C, Otero B, Arribas-Layton M, Abdelhamed S, Song G, Ma X, Thomas Rd ME, Ma J, Klco JM. UBTF tandem duplications in pediatric myelodysplastic syndrome and acute myeloid leukemia: implications for clinical screening and diagnosis. Haematologica 2024. [PMID: 38426285 DOI: 10.3324/haematol.2023.284683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Indexed: 03/02/2024] Open
Abstract
Recent genomic studies in adult and pediatric acute myeloid leukemia (AML) demonstrated recurrent in-frame tandem duplications (TD) in exon 13 of upstream binding transcription factor (UBTF). These alterations, which account for ~4.3% of AMLs in childhood and about 3% in adult AMLs under 60, are subtype-defining and associated with poor outcomes. Here, we provide a comprehensive investigation into the clinicopathological features of UBTF-TD myeloid neoplasms in childhood, including 89 unique pediatric AML and 6 myelodysplastic syndrome (MDS) cases harboring a tandem duplication in exon 13 of UBTF. We demonstrate that UBTF-TD myeloid tumors are associated with dysplastic features, low bone marrow blast infiltration, and low white blood cell count. Furthermore, using bulk and single-cell analyses, we confirm that UBTF-TD is an early and clonal event associated with a distinct transcriptional profile, whereas the acquisition of FLT3 or WT1 mutations is associated with more stem celllike programs. Lastly, we report rare duplications within exon 9 of UBTF that phenocopy exon 13 duplications, expanding the spectrum of UBTF alterations in pediatric myeloid tumors. Collectively, we comprehensively characterize pediatric AML and MDS with UBTF-TD and highlight key clinical and pathologic features that distinguish this new entity from other molecular subtypes of AML.
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Affiliation(s)
- Juan M Barajas
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Masayuki Umeda
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Lisett Contreras
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Mahsa Khanlari
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Tamara Westover
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Michael P Walsh
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Emily Xiong
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | | | | | | | - Sherif Abdelhamed
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Guangchun Song
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Xiaotu Ma
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, TN
| | - Melvin E Thomas Rd
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Jing Ma
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Jeffery M Klco
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN.
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Barajas JM, Umeda M, Contreras L, Khanlari M, Westover T, Walsh MP, Xiong E, Yang C, Otero B, Arribas-Layton M, Abdelhamed S, Song G, Ma X, Thomas ME, Ma J, Klco JM. UBTF Tandem Duplications in Pediatric MDS and AML: Implications for Clinical Screening and Diagnosis. medRxiv 2023:2023.11.13.23298320. [PMID: 38014207 PMCID: PMC10680889 DOI: 10.1101/2023.11.13.23298320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Recent genomic studies in adult and pediatric acute myeloid leukemia (AML) demonstrated recurrent in-frame tandem duplications (TD) in exon 13 of upstream binding transcription factor (UBTF). These alterations, which account for ~4.3% of AMLs in childhood and up to 3% in adult AMLs under 60, are subtype-defining and associated with poor outcomes. Here, we provide a comprehensive investigation into the clinicopathological features of UBTF-TD myeloid neoplasms in childhood, including 89 unique pediatric AML and 6 myelodysplastic syndrome (MDS) cases harboring a tandem duplication in exon 13 of UBTF. We demonstrate that UBTF-TD myeloid tumors are associated with dysplastic features, low bone marrow blast infiltration, and low white blood cell count. Furthermore, using bulk and single-cell analyses, we confirm that UBTF-TD is an early and clonal event associated with a distinct transcriptional profile, whereas the acquisition of FLT3 or WT1 mutations is associated with more stem cell-like programs. Lastly, we report rare duplications within exon 9 of UBTF that phenocopy exon 13 duplications, expanding the spectrum of UBTF alterations in pediatric myeloid tumors. Collectively, we comprehensively characterize pediatric AML and MDS with UBTF-TD and highlight key clinical and pathologic features that distinguish this new entity from other molecular subtypes of AML.
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Affiliation(s)
- Juan M. Barajas
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Masayuki Umeda
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Lisett Contreras
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Mahsa Khanlari
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Tamara Westover
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Michael P. Walsh
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Emily Xiong
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | | | | | | | - Sherif Abdelhamed
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Guangchun Song
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Xiaotu Ma
- Department of Computational Biology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Melvin E. Thomas
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Jing Ma
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Jeffery M. Klco
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN, USA
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Wang Y, Arribas-Layton M, Chen Y, Lykke-Andersen J, Sen GL. DDX6 Orchestrates Mammalian Progenitor Function through the mRNA Degradation and Translation Pathways. Mol Cell 2015; 60:118-30. [PMID: 26412305 DOI: 10.1016/j.molcel.2015.08.014] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 06/11/2015] [Accepted: 08/18/2015] [Indexed: 12/26/2022]
Abstract
In adult tissues, stem and progenitor cells must balance proliferation and differentiation to maintain homeostasis. How this is done is unclear. Here, we show that the DEAD box RNA helicase, DDX6 is necessary for maintaining adult progenitor cell function. DDX6 loss results in premature differentiation and decreased proliferation of epidermal progenitor cells. To maintain self-renewal, DDX6 associates with YBX1 to bind the stem loops found in the 3' UTRs of regulators of proliferation/self-renewal (CDK1, EZH2) and recruit them to EIF4E to facilitate their translation. To prevent premature differentiation of progenitor cells, DDX6 regulates the 5' UTR of differentiation inducing transcription factor, KLF4 and degrades its transcripts through association with mRNA degradation proteins. Our results demonstrate that progenitor function is maintained by DDX6 complexes through two distinct pathways that include the degradation of differentiation-inducing transcripts and by promoting the translation of self-renewal and proliferation mRNAs.
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Affiliation(s)
- Ying Wang
- Department of Dermatology, University of California, San Diego, La Jolla, CA 92093-0869, USA; Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093-0869, USA; UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869, USA
| | - Marc Arribas-Layton
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093-0869, USA
| | - Yifang Chen
- Department of Dermatology, University of California, San Diego, La Jolla, CA 92093-0869, USA; Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093-0869, USA; UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869, USA
| | - Jens Lykke-Andersen
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093-0869, USA
| | - George L Sen
- Department of Dermatology, University of California, San Diego, La Jolla, CA 92093-0869, USA; Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093-0869, USA; UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869, USA.
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