Abstract:
:Improved survival of patients with acute lymphoblastic leukemia (ALL) has emerged from identifying new prognostic markers; however, 20% of children still suffer recurrence. Previously, the altered expression of Fat1 cadherin has been implicated in a number of solid tumors. In this report, in vitro analysis shows that Fat1 protein is expressed by a range of leukemia cell lines, but not by normal peripheral blood (PB) and bone marrow (BM) cells from healthy donors. In silico analysis of expression of array data from clinical leukemias found significant levels of Fat1 transcript in 11% of acute myeloid leukemia, 29% and 63% of ALL of B and T lineages, respectively, and little or no transcript present in normal PB or BM. Furthermore, in two independent studies of matched diagnosis-relapse of precursor B-cell (preB) ALL pediatric samples (n=32 and n=27), the level of Fat1 mRNA expression was prognostic at the time of diagnosis. High Fat1 mRNA expression was predictive of shorter relapse-free and overall survival, independent of other traditional prognostic markers, including white blood cell count, sex and age. The data presented demonstrate that Fat1 expression in preB-ALL has a role in the emergence of relapse and could provide a suitable therapeutic target in high-risk preB-ALL.
journal_name
Leukemiajournal_title
Leukemiaauthors
de Bock CE,Ardjmand A,Molloy TJ,Bone SM,Johnstone D,Campbell DM,Shipman KL,Yeadon TM,Holst J,Spanevello MD,Nelmes G,Catchpoole DR,Lincz LF,Boyd AW,Burns GF,Thorne RFdoi
10.1038/leu.2011.319subject
Has Abstractpub_date
2012-05-01 00:00:00pages
918-26issue
5eissn
0887-6924issn
1476-5551pii
leu2011319journal_volume
26pub_type
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