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- Title
Cell line OCI/AML3 bears exon-12 NPM gene mutation-A and cytoplasmic expression of nucleophosmin.
- Authors
Quentmeier, H.; Martelli, M. P.; Dirks, W. G.; Bolli, N.; Liso, A.; MacLeod, R. A. F.; Nicoletti, I.; Mannucci, R.; Pucciarini, A.; Bigerna, B.; Martelli, M. F.; Mecucci, C.; Drexler, H. G.; Falini, B.
- Abstract
We recently identified a new acute myeloid leukemia (AML) subtype characterized by mutations at exon-12 of the nucleophosmin (NPM) gene and aberrant cytoplasmic expression of NPM protein (NPMc+). NPMc+ AML accounts for about 35% of adult AML and it is associated with normal karyotype, wide morphological spectrum, CD34-negativity, high frequency of FLT3-ITD mutations and good response to induction therapy. In an attempt to identify a human cell line to serve as a model for the in vitro study of NPMc+ AML, we screened 79 myeloid cell lines for mutations at exon-12 of NPM. One of these cell lines, OCI/AML3, showed a TCTG duplication at exon-12 of NPM. This mutation corresponds to the type A, the NPM mutation most frequently observed in primary NPMc+ AML. OCI/AML3 cells also displayed typical phenotypic features of NPMc+ AML, that is, expression of macrophage markers and lack of CD34, and the immunocytochemical hallmark of this leukemia subtype, that is, the aberrant cytoplasmic expression of NPM. The OCI/AML3 cell line easily engrafts in NOD/SCID mice and maintains in the animals the typical features of NPMc+ AML, such as the NPM cytoplasmic expression. For all these reasons, the OCI/AML3 cell line represents a remarkable tool for biomolecular studies of NPMc+ AML.Leukemia (2005) 19, 1760–1767. doi:10.1038/sj.leu.2403899; published online 4 August 2005
- Subjects
ACUTE myeloid leukemia; BONE marrow diseases; CELL lines; GENETIC mutation; KARYOTYPES; CYTOPLASM
- Publication
Leukemia (08876924), 2005, Vol 19, Issue 10, p1760
- ISSN
0887-6924
- Publication type
Article
- DOI
10.1038/sj.leu.2403899