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Abe, A. et al.

Abe, Kiyoi, Ninomiya, Yamazaki, Murase, Ozeki, Suzuki, Hayakawa, Katsumi, Emi, Naoe,

Establishment of a Stroma-Dependent Human Acute Myelomonocytic Leukemia Cell Line, NAMO-2, with FLT3 Tandem Duplication.

We have established a stroma-dependent myelomonocytic cell line, NAMO-2, with FLT3 internal tandem duplication (FLT3/ITD). Leukemia cells from a patient with acute myelomonocytic leukemia were administered to form subcutaneous tumors in nude mice, which were maintained successively, although we failed to establish continuously growing cells from the original leukemia cell culture. In the cultures of cells from subcutaneous tumors, there were stroma cells that had originated from the nude mice and showed continuous growth. The leukemia cells showed continuous growth dependent on this stroma, and this cell line was named NAMO-2. Detection of FLT3/ITD by the reverse transcriptase polymerase chain reaction (PCR) and genomic PCR showed that NAMO-2 was homozygous for FLT3/ITD. Constitutive activation of FLT3 was detected by Western blotting, and the phosphorylation of Akt, MEK, and STAT5 was also observed. FLT3 kinase inhibitor AG1296 specifically inhibited cell growth. NAMO-2 provides a useful tool to analyze adherence-dependent survival signaling of leukemia with FLT3/ITD and a model for the screening of FLT3 kinase inhibitors.[1]

References

Establishment of a Stroma-Dependent Human Acute Myelomonocytic Leukemia Cell Line, NAMO-2, with FLT3 Tandem Duplication. Abe, A., Kiyoi, H., Ninomiya, M., Yamazaki, T., Murase, T., Ozeki, K., Suzuki, M., Hayakawa, F., Katsumi, A., Emi, N., Naoe, T. Int. J. Hematol. (2006) [Pubmed]

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