Presence of N regions in the clonotypic DJ rearrangements of the immunoglobulin heavy-chain genes indicates an exquisitely short latency in t(4;11)-positive infant acute lymphoblastic leukemia

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Abstract

Childhood acute lymphoblastic leukemia (ALL) is frequently initiated in utero at a time of developmentally regulated insertion of N regions into the DJH rearrangements of immunoglobulin heavy-chain (IgH) genes. Here it is shown that N regions are present in the clonotypic DJH rearrangements in 11 of 12 infant ALLs with t(4;11). These data are compared with the 122 previously published DJH sequences and were found to have a pattern similar to that of ALL in children older than 3 years at diagnosis but were unlike that in children younger than 3 years who predominantly lack N regions. These findings, therefore, indicate that t(4;11)-positive infant ALL is initiated later in fetal development than most B-cell precursor ALL from children younger than 3 years and that they have a shorter latency period already in utero. © 2001 by The American Society of Hematology.

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Fasching, K., Panzer, S., Haas, O. A., Borkhardt, A., Marschalek, R., Griesinger, F., & Renate Panzer-Grümayer, E. (2001). Presence of N regions in the clonotypic DJ rearrangements of the immunoglobulin heavy-chain genes indicates an exquisitely short latency in t(4;11)-positive infant acute lymphoblastic leukemia. Blood, 98(7), 2272–2274. https://doi.org/10.1182/blood.V98.7.2272

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