Acute lymphoblastic leukemia of childhood: identification of two distinct regions of deletion on the short arm of chromosome 12 in the region of TEL and KIP1

Cytogenetic analysis of acute lymphoblastic leukemia (ALL) of childhood identified nonrandom chromosomal abnormalities of the short arm of chromosome 12. The alterations include deletions that are thought to be indicative of the presence of a tumor suppressor gene that is mutated on the remaining al...

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Hauptverfasser: Takeuchi, Seisho (VerfasserIn) , Bartram, Claus R. (VerfasserIn) , Miller, Carl W. (VerfasserIn) , Reiter, Alfred (VerfasserIn) , Seriu, Taku (VerfasserIn) , Zimmermann, Martin (VerfasserIn) , Schrappe, Martin (VerfasserIn) , Mori, Naoki (VerfasserIn) , Slater, James (VerfasserIn) , Miyoshi, Isao (VerfasserIn) , Koeffler, H. Phillip (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 15 April 1996
In: Blood
Year: 1996, Jahrgang: 87, Heft: 8, Pages: 3368-3374
ISSN:1528-0020
DOI:10.1182/blood.V87.8.3368.bloodjournal8783368
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1182/blood.V87.8.3368.bloodjournal8783368
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0006497120647425
Volltext
Verfasserangaben:Seisho Takeuchi, Claus R. Bartram, Carl W. Miller, Alfred Reiter, Taku Seriu, Martin Zimmermann, Martin Schrappe, Naoki Mori, James Slater, Isao Miyoshi, H. Phillip Koeffler

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245 1 0 |a Acute lymphoblastic leukemia of childhood  |b identification of two distinct regions of deletion on the short arm of chromosome 12 in the region of TEL and KIP1  |c Seisho Takeuchi, Claus R. Bartram, Carl W. Miller, Alfred Reiter, Taku Seriu, Martin Zimmermann, Martin Schrappe, Naoki Mori, James Slater, Isao Miyoshi, H. Phillip Koeffler 
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520 |a Cytogenetic analysis of acute lymphoblastic leukemia (ALL) of childhood identified nonrandom chromosomal abnormalities of the short arm of chromosome 12. The alterations include deletions that are thought to be indicative of the presence of a tumor suppressor gene that is mutated on the remaining allele. To refine further the chromosomal localization of this gene, we analyzed the loss of heterozygosity (LOH) of chromosome 12 in 100 primary ALL samples using 22 polymorpic markers and identified two distinct smallest common deleted regions on chromosome 12p13. One region is flanked by D12S77 and D12S98 and has a size of 4 cM. Twenty-six percent of informative patients showed LOH in this region. This region may contain the TEL gene. The other region is flanked by D12S269 and D12S308 including the KIP1 gene. Forty-four percent of informative patients showed LOH in this second region. Mutational analysis of KIP1 using polymerase chain reaction-single-strand conformation polymorphism analysis and Southern blot analysis showed no homozygous deletions and point mutations suggesting that the altered gene in this second region is not the KIP1. Clinical data showed that LOH of 12p was demonstrated more frequently in precursor-B ALLs (32 of 80; 40%) than in T-ALLs (1 of 20; 5%) (P = .0027). Furthermore, patients with 12p LOH were younger (P = .013), with a lower DNA index (P = .046), but they had the same survival rates at 3 years. In summary, these data suggest that two different tumor suppressor genes are on chromosome arm 12p, which act separately in the development of childhood precursor-B ALLs. One of the tumor suppressor genes is in the region the KIP1 gene, but our data suggest this gene is not abnormal. The other target is in the region of the TEL gene; and this candidate deserves further study. 
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