G2Cdb::Allele report

Mutation type

Altered genes (1)

Gene Symbol Species Description
G00002371 CALM1 Homo sapiens calmodulin 1 (phosphorylase kinase, delta)

Diseases (1)

Disease Description Nervous effect
D00000091 T-cell acute lymphoblastic leukaemia N

Literature (1)

Pubmed - human_disease

  • The cryptic chromosomal deletion del(11)(p12p13) as a new activation mechanism of LMO2 in pediatric T-cell acute lymphoblastic leukemia.

    Van Vlierberghe P, van Grotel M, Beverloo HB, Lee C, Helgason T, Buijs-Gladdines J, Passier M, van Wering ER, Veerman AJ, Kamps WA, Meijerink JP and Pieters R

    Erasmus MC/Sophia Children's Hospital, Department of Pediatric Oncology/Hematology, 3000 CB Rotterdam, The Netherlands.

    To identify new cytogenetic abnormalities associated with leukemogenesis or disease outcome, T-cell acute lymphoblastic leukemia (T-ALL) patient samples were analyzed by means of the array-comparative genome hybridization technique (array-CGH). Here, we report the identification of a new recurrent and cryptic deletion on chromosome 11 (del(11)(p12p13)) in about 4% (6/138) of pediatric T-ALL patients. Detailed molecular-cytogenetic analysis revealed that this deletion activates the LMO2 oncogene in 4 of 6 del(11)(p12p13)-positive T-ALL patients, in the same manner as in patients with an LMO2 translocation (9/138). The LMO2 activation mechanism of this deletion is loss of a negative regulatory region upstream of LMO2, causing activation of the proximal LMO2 promoter. LMO2 rearrangements, including this del(11)(p12p13) and t(11;14) (p13;q11) or t(7;11)(q35;p13), were found in the absence of other recurrent cytogenetic abnormalities involving HOX11L2, HOX11, CALM-AF10, TAL1, MLL, or MYC. LMO2 abnormalities represent about 9% (13/138) of pediatric T-ALL cases and are more frequent in pediatric T-ALL than appreciated until now.

    Blood 2006;108;10;3520-9

© G2C 2014. The Genes to Cognition Programme received funding from The Wellcome Trust and the EU FP7 Framework Programmes:
EUROSPIN (FP7-HEALTH-241498), SynSys (FP7-HEALTH-242167) and GENCODYS (FP7-HEALTH-241995).

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