title: Frequency and DNA sequence of tal-1 rearrangement in children with T-cell acute lymphoblastic leukemia.
abstract: Using nested polymerase chain reaction (PCR) a gene rearrangement named tal-1 deletion was found in five of 56 leukemic bone marrow samples from children with T-cell acute lymphoblastic leukemia (ALL). The DNA sequences of the PCR fragments consisted of the known conserved germline sequences in addition to short DNA insertions at the breakpoint region, which were different in each patient. Moreover, one patient was examined at diagnosis and at relapse 11 months later, revealing identical DNA sequences at the rearrangement site. The recombination site of the tal rearrangement therefore may be used as a genetic marker for detecting minimal residual disease in about 10% of T-cell ALL in childhood.
authors.affiliation: Children's Hospital, University of Giessen, Federal Republic of Germany.
authors.forename: A
authors.initials: A
authors.lastname: Borkhardt
authors.forename: R
authors.initials: R
authors.lastname: Repp
authors.forename: J
authors.initials: J
authors.lastname: Harbott
authors.forename: C
authors.initials: C
authors.lastname: Keller
authors.forename: F
authors.initials: F
authors.lastname: Berner
authors.forename: J
authors.initials: J
authors.lastname: Ritterbach
authors.forename: F
authors.initials: F
authors.lastname: Lampert
mesh_terms: D001483:Base Sequence; D002648:Child; D004247:DNA / Q000235:genetics*; D005787:Gene Frequency; D015321:Gene Rearrangement; D006801:Humans; D015459:Leukemia-Lymphoma, Adult T-Cell / Q000235:genetics* / Q000628:therapy; D008969:Molecular Sequence Data; D009364:Neoplasm Recurrence, Local; D016133:Polymerase Chain Reaction
chemical_list: D004247:DNA