SEPT2 is a new fusion partner of MLL in acute myeloid leukemia with t(2;11)(q37;q23)

We have identified a new mixed lineage leukemia ( MLL ) gene fusion partner in a patient with treatment-related acute myeloid leukemia (AML) presenting a t(2;11)(q37;q23) as the only cytogenetic abnormality. Fluorescence in situ hybridization demonstrated a rearrangement of the MLL gene and molecula...

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Veröffentlicht in:Oncogene 2006-10, Vol.25 (45), p.6147-6152
Hauptverfasser: Cerveira, N, Correia, C, Bizarro, S, Pinto, C, Lisboa, S, Mariz, J M, Marques, M, Teixeira, M R
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container_end_page 6152
container_issue 45
container_start_page 6147
container_title Oncogene
container_volume 25
creator Cerveira, N
Correia, C
Bizarro, S
Pinto, C
Lisboa, S
Mariz, J M
Marques, M
Teixeira, M R
description We have identified a new mixed lineage leukemia ( MLL ) gene fusion partner in a patient with treatment-related acute myeloid leukemia (AML) presenting a t(2;11)(q37;q23) as the only cytogenetic abnormality. Fluorescence in situ hybridization demonstrated a rearrangement of the MLL gene and molecular genetic analyses identified a septin family gene, SEPT2 , located on chromosome 2q37, as the fusion partner of MLL . RNA and DNA analyses showed the existence of an in-frame fusion of MLL exon 7 with SEPT2 exon 3, with the genomic breakpoints located in intron 7 and 2 of MLL and SEPT2 , respectively. Search for DNA sequence motifs revealed the existence of two sequences with 94.4% homology with the topoisomerase II consensus cleavage site in MLL intron 7 and SEPT2 intron 2. SEPT2 is the fifth septin family gene fused with MLL , making this gene family the most frequently involved in MLL -related AML (about 10% of all known fusion partners). The protein encoded by SEPT2 is highly homologous to septins 1, 4 and 5 and is involved in the coordination of several key steps of mitosis. Further studies are warranted to understand why the septin protein family is particularly involved in the pathogenesis of MLL -associated leukemia.
doi_str_mv 10.1038/sj.onc.1209626
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Fluorescence in situ hybridization demonstrated a rearrangement of the MLL gene and molecular genetic analyses identified a septin family gene, SEPT2 , located on chromosome 2q37, as the fusion partner of MLL . RNA and DNA analyses showed the existence of an in-frame fusion of MLL exon 7 with SEPT2 exon 3, with the genomic breakpoints located in intron 7 and 2 of MLL and SEPT2 , respectively. Search for DNA sequence motifs revealed the existence of two sequences with 94.4% homology with the topoisomerase II consensus cleavage site in MLL intron 7 and SEPT2 intron 2. SEPT2 is the fifth septin family gene fused with MLL , making this gene family the most frequently involved in MLL -related AML (about 10% of all known fusion partners). The protein encoded by SEPT2 is highly homologous to septins 1, 4 and 5 and is involved in the coordination of several key steps of mitosis. 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Psychology</subject><subject>Fusion protein</subject><subject>Gene fusion</subject><subject>Gene rearrangement</subject><subject>Genes</subject><subject>Genetic analysis</subject><subject>Genetics</subject><subject>Hematologic and hematopoietic diseases</subject><subject>Histone-Lysine N-Methyltransferase</subject><subject>Homology</subject><subject>Human Genetics</subject><subject>Humans</subject><subject>Hybridization</subject><subject>In Situ Hybridization, Fluorescence</subject><subject>Internal Medicine</subject><subject>Karyotyping</subject><subject>Leukemia</subject><subject>Leukemia, Myeloid - chemically induced</subject><subject>Leukemia, Myeloid - genetics</subject><subject>Leukemias. Malignant lymphomas. Malignant reticulosis. 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Action of oncogenes and antioncogenes</topic><topic>Chromosome 2</topic><topic>Chromosomes, Human, Pair 11</topic><topic>Chromosomes, Human, Pair 2</topic><topic>Cytogenetics</topic><topic>Deoxyribonucleic acid</topic><topic>DNA</topic><topic>DNA topoisomerase (ATP-hydrolysing)</topic><topic>DNA, Neoplasm</topic><topic>Exons</topic><topic>Female</topic><topic>Fluorescence</topic><topic>Fluorescence in situ hybridization</topic><topic>Fundamental and applied biological sciences. 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subjects Acute myeloid leukemia
Amino Acid Sequence
Apoptosis
Base Sequence
Biological and medical sciences
Breakpoints
Cell Biology
Cell physiology
Cell transformation and carcinogenesis. Action of oncogenes and antioncogenes
Chromosome 2
Chromosomes, Human, Pair 11
Chromosomes, Human, Pair 2
Cytogenetics
Deoxyribonucleic acid
DNA
DNA topoisomerase (ATP-hydrolysing)
DNA, Neoplasm
Exons
Female
Fluorescence
Fluorescence in situ hybridization
Fundamental and applied biological sciences. Psychology
Fusion protein
Gene fusion
Gene rearrangement
Genes
Genetic analysis
Genetics
Hematologic and hematopoietic diseases
Histone-Lysine N-Methyltransferase
Homology
Human Genetics
Humans
Hybridization
In Situ Hybridization, Fluorescence
Internal Medicine
Karyotyping
Leukemia
Leukemia, Myeloid - chemically induced
Leukemia, Myeloid - genetics
Leukemias. Malignant lymphomas. Malignant reticulosis. Myelofibrosis
Medical sciences
Medical treatment
Medicine
Medicine & Public Health
Middle Aged
Mitosis
MLL protein
Molecular and cellular biology
Molecular Sequence Data
Myeloid-Lymphoid Leukemia Protein - genetics
Nucleotide sequence
oncogenomics
Oncology
Phosphoric Monoester Hydrolases - genetics
Reverse Transcriptase Polymerase Chain Reaction
Septin
Sequence Homology, Nucleic Acid
Translocation, Genetic
title SEPT2 is a new fusion partner of MLL in acute myeloid leukemia with t(2;11)(q37;q23)
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