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Expression of NUP98/TOP1, but not of TOP1/NUP98, in a treatment-related myelodysplastic syndrome with t(10;20;11)(q24;q11;p15).

Panagopoulos, Ioannis LU ; Fioretos, Thoas LU ; Isaksson, Margareth LU ; Larsson, Gun ; Billström, Rolf ; Mitelman, Felix LU orcid and Johansson, Bertil LU (2002) In Genes, Chromosomes and Cancer 34(2). p.249-254
Abstract
The t(11;20)(p15;q11) is a rare but recurrent translocation that so far has been described in only four acute myeloid leukemias (AMLs), two treatment-related myelodysplastic syndromes (t-MDSs), and one case of polycythemia vera. Recently, the t(11;20) was shown to result in a fusion of the NUP98 and TOP1 genes, with expression of the NUP98/TOP1 chimera encoded by the der(11)t(11;20), but not of the reciprocal TOP1/NUP98 on the der(20)t(11;20). The genomic breakpoints were subsequently mapped to introns 13 and 7 of NUP98 and TOP1, respectively. We present here a t-MDS with a three-way variant translocation, t(10;20;11)(q24;q11;p15), that generates a der(11)t(11;20) but not a der(20)t(11;20), strongly suggesting that the der(11) harbors the... (More)
The t(11;20)(p15;q11) is a rare but recurrent translocation that so far has been described in only four acute myeloid leukemias (AMLs), two treatment-related myelodysplastic syndromes (t-MDSs), and one case of polycythemia vera. Recently, the t(11;20) was shown to result in a fusion of the NUP98 and TOP1 genes, with expression of the NUP98/TOP1 chimera encoded by the der(11)t(11;20), but not of the reciprocal TOP1/NUP98 on the der(20)t(11;20). The genomic breakpoints were subsequently mapped to introns 13 and 7 of NUP98 and TOP1, respectively. We present here a t-MDS with a three-way variant translocation, t(10;20;11)(q24;q11;p15), that generates a der(11)t(11;20) but not a der(20)t(11;20), strongly suggesting that the der(11) harbors the critical genetic rearrangement. Reverse transcriptase-polymerase chain reaction (RT-PCR) revealed a NUP98/TOP1 fusion in which exon 13 of NUP98 was fused in-frame with exon 8 of TOP1. Extra long (XL) genomic PCR and subsequent sequence analyses showed that the breakpoint in NUP98 occurred at nucleotide (nt) 3461 of intron 13, close to a MER (medium reiteration frequency interspersed repetitive element) repeat, and that the breakpoint in TOP1 was at nt 1436 of intron 7, downstream of a MIR (mammalian-wide interspersed repeats) repetitive element. Genomic XL PCR did not amplify the reciprocal TOP1/NUP98, nor was this chimera expressed, as expected from the cytogenetic finding. The present results provide further support for the involvement of the NUP98/TOP1 transcript, but not of the reciprocal one, in the development of MDS/AML. Furthermore, the three cases genomically characterized to date have all been treatment-related and have all harbored breakpoints in intron 13 of NUP98 and intron 7 of TOP1, suggesting that these introns are susceptible to chemotherapy-induced breakage. (Less)
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Contribution to journal
publication status
published
subject
keywords
Chromosomes, Human, Pair 20 : genetics, DNA Topoisomerases, Type I : biosynthesis, Type I : genetics, Female, Middle Age, Molecular Sequence Data, Myelodysplastic Syndromes : chemically induced, Myelodysplastic Syndromes : genetics, Nuclear Pore Complex Proteins : biosynthesis, Neoplasm Proteins : genetics, Nuclear Pore Complex Proteins : genetics, Support, Non-U.S. Gov't, Translocation (Genetics) : genetics, Pair 11 : genetics, Pair 10 : genetics, Human : genetics, Case Report, Base Sequence : genetics, Amino Acid Sequence : genetics
in
Genes, Chromosomes and Cancer
volume
34
issue
2
pages
249 - 254
publisher
John Wiley & Sons Inc.
external identifiers
  • wos:000175101800012
  • pmid:11979559
  • scopus:0036259314
  • pmid:11979559
ISSN
1045-2257
DOI
10.1002/gcc.10066
language
English
LU publication?
yes
id
97fd84f2-e131-4044-99de-39009a48fa29 (old id 108411)
alternative location
http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11979559&dopt=Abstract
date added to LUP
2016-04-01 11:54:44
date last changed
2022-02-25 23:08:07
@article{97fd84f2-e131-4044-99de-39009a48fa29,
  abstract     = {{The t(11;20)(p15;q11) is a rare but recurrent translocation that so far has been described in only four acute myeloid leukemias (AMLs), two treatment-related myelodysplastic syndromes (t-MDSs), and one case of polycythemia vera. Recently, the t(11;20) was shown to result in a fusion of the NUP98 and TOP1 genes, with expression of the NUP98/TOP1 chimera encoded by the der(11)t(11;20), but not of the reciprocal TOP1/NUP98 on the der(20)t(11;20). The genomic breakpoints were subsequently mapped to introns 13 and 7 of NUP98 and TOP1, respectively. We present here a t-MDS with a three-way variant translocation, t(10;20;11)(q24;q11;p15), that generates a der(11)t(11;20) but not a der(20)t(11;20), strongly suggesting that the der(11) harbors the critical genetic rearrangement. Reverse transcriptase-polymerase chain reaction (RT-PCR) revealed a NUP98/TOP1 fusion in which exon 13 of NUP98 was fused in-frame with exon 8 of TOP1. Extra long (XL) genomic PCR and subsequent sequence analyses showed that the breakpoint in NUP98 occurred at nucleotide (nt) 3461 of intron 13, close to a MER (medium reiteration frequency interspersed repetitive element) repeat, and that the breakpoint in TOP1 was at nt 1436 of intron 7, downstream of a MIR (mammalian-wide interspersed repeats) repetitive element. Genomic XL PCR did not amplify the reciprocal TOP1/NUP98, nor was this chimera expressed, as expected from the cytogenetic finding. The present results provide further support for the involvement of the NUP98/TOP1 transcript, but not of the reciprocal one, in the development of MDS/AML. Furthermore, the three cases genomically characterized to date have all been treatment-related and have all harbored breakpoints in intron 13 of NUP98 and intron 7 of TOP1, suggesting that these introns are susceptible to chemotherapy-induced breakage.}},
  author       = {{Panagopoulos, Ioannis and Fioretos, Thoas and Isaksson, Margareth and Larsson, Gun and Billström, Rolf and Mitelman, Felix and Johansson, Bertil}},
  issn         = {{1045-2257}},
  keywords     = {{Chromosomes; Human; Pair 20 : genetics; DNA Topoisomerases; Type I : biosynthesis; Type I : genetics; Female; Middle Age; Molecular Sequence Data; Myelodysplastic Syndromes : chemically induced; Myelodysplastic Syndromes : genetics; Nuclear Pore Complex Proteins : biosynthesis; Neoplasm Proteins : genetics; Nuclear Pore Complex Proteins : genetics; Support; Non-U.S. Gov't; Translocation (Genetics) : genetics; Pair 11 : genetics; Pair 10 : genetics; Human : genetics; Case Report; Base Sequence : genetics; Amino Acid Sequence : genetics}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{249--254}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Genes, Chromosomes and Cancer}},
  title        = {{Expression of NUP98/TOP1, but not of TOP1/NUP98, in a treatment-related myelodysplastic syndrome with t(10;20;11)(q24;q11;p15).}},
  url          = {{http://dx.doi.org/10.1002/gcc.10066}},
  doi          = {{10.1002/gcc.10066}},
  volume       = {{34}},
  year         = {{2002}},
}