A novel RARA-SNX15 fusion in PML-RARA-positive acute promyelocytic leukemia with t(11;17;15)(q13;q21.2;q24.1). 2022

Kentaro Hirade, and Shigeru Kusumoto, and Akihiro Abe, and Hatsune Noritake, and Asahi Ito, and Masaki Ri, and Hirokazu Komatsu, and Shinsuke Iida, and Yukiya Yamamoto
Department of Hematology and Oncology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi, Japan.

Acute promyelocytic leukemia (APL) is characterized by a series of retinoic acid receptor (RAR) fusion genes that lead to the dysregulation of RAR signaling and onset of APL. PML-RARA is the most common fusion generated from t(15;17)(q24;q21). In addition, the reciprocal fusion RARA-PML is present in over 80% of t(15;17) APL cases. The bcr3 types of RARA-PML and RARA-PLZF in particular are reciprocal fusions that contribute to leukemogenesis. Here, we report a variant APL case with t(11;17;15)(q13;q21.2;q24.1). Massive parallel sequencing of patient RNA detected the novel fusion transcripts RARA-SNX15 and SNX15-LINC02255 along with the bcr3 type of PML-RARA. Genetic analysis revealed that RARA-SNX15L is an in-frame fusion due to intron retention caused by RNA mis-splicing. RARA-SNX15L consisted mainly of SNX15 domains, including the Phox-homology domain, which has a critical role in protein-protein interactions among sorting nexins and with other partners. Co-immunoprecipitation analysis revealed that RARA-SNX15L is directly associated with SNX15 and with itself. Further studies are needed to evaluate the biological significance of RARA-SNX15L in APL. In conclusion, this is the first report of APL with a complex chromosomal rearrangement involving SNX15.

UI MeSH Term Description Entries
D007438 Introns Sequences of DNA in the genes that are located between the EXONS. They are transcribed along with the exons but are removed from the primary gene transcript by RNA SPLICING to leave mature RNA. Some introns code for separate genes. Intervening Sequences,Sequences, Intervening,Intervening Sequence,Intron,Sequence, Intervening
D002884 Chromosomes, Human, Pair 15 A specific pair of GROUP D CHROMOSOMES of the human chromosome classification. Chromosome 15
D002886 Chromosomes, Human, Pair 17 A specific pair of GROUP E CHROMOSOMES of the human chromosome classification. Chromosome 17
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012313 RNA A polynucleotide consisting essentially of chains with a repeating backbone of phosphate and ribose units to which nitrogenous bases are attached. RNA is unique among biological macromolecules in that it can encode genetic information, serve as an abundant structural component of cells, and also possesses catalytic activity. (Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed) RNA, Non-Polyadenylated,Ribonucleic Acid,Gene Products, RNA,Non-Polyadenylated RNA,Acid, Ribonucleic,Non Polyadenylated RNA,RNA Gene Products,RNA, Non Polyadenylated
D014178 Translocation, Genetic A type of chromosome aberration characterized by CHROMOSOME BREAKAGE and transfer of the broken-off portion to another location, often to a different chromosome. Chromosomal Translocation,Translocation, Chromosomal,Chromosomal Translocations,Genetic Translocation,Genetic Translocations,Translocations, Chromosomal,Translocations, Genetic
D015473 Leukemia, Promyelocytic, Acute An acute myeloid leukemia in which abnormal PROMYELOCYTES predominate. It is frequently associated with DISSEMINATED INTRAVASCULAR COAGULATION. Leukemia, Myeloid, Acute, M3,Leukemia, Progranulocytic,Myeloid Leukemia, Acute, M3,Progranulocytic Leukemia,Promyelocytic Leukemia, Acute,AML M3,Acute Promyelocytic Leukemia,Leukemia, Acute Promyelocytic,M3 ANLL,ANLL, M3,Acute Promyelocytic Leukemias
D015514 Oncogene Proteins, Fusion The GENETIC TRANSLATION products of the fusion between an ONCOGENE and another gene. The latter may be of viral or cellular origin. Chimeric Oncogene Proteins,Chimeric Proteins, Oncogene,Fusion Proteins, Oncogene,Oncogene Fusion Proteins,Oncogene Proteins, Chimeric,Fusion Oncogene Proteins,Oncogene Chimeric Proteins,Proteins, Chimeric Oncogene,Proteins, Fusion Oncogene,Proteins, Oncogene Chimeric,Proteins, Oncogene Fusion
D050939 Gene Fusion The GENETIC RECOMBINATION of the parts of two or more GENES resulting in a gene with different or additional regulatory regions, or a new chimeric gene product. ONCOGENE FUSION includes an ONCOGENE as at least one of the fusion partners and such gene fusions are often detected in neoplastic cells and are transcribed into ONCOGENE FUSION PROTEINS. ARTIFICIAL GENE FUSION is carried out in vitro by RECOMBINANT DNA technology. Fusion, Gene,Fusions, Gene,Gene Fusions
D018168 Receptors, Retinoic Acid Proteins in the nucleus or cytoplasm that specifically bind RETINOIC ACID or RETINOL and trigger changes in the behavior of cells. Retinoic acid receptors, like steroid receptors, are ligand-activated transcription regulators. Several types have been recognized. Retinoic Acid Receptors,Retinoic Acid-Binding Proteins,Retinoic Acid Receptor,Proteins, Retinoic Acid-Binding,Receptor, Retinoic Acid,Retinoic Acid Binding Proteins

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