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Leuk Res. 2003 Apr;27(4):359-61.

Frameshift mutations in caspase-5 and other target genes in leukemia and lymphoma cell lines having microsatellite instability.

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Department of Internal Medicine, Kochi Medical School, Okohcho, Nankoku 783-8505, Japan.


Microsatellite instability (MSI) was examined in 49 lymphoid leukemia/lymphoma cell lines. Frameshift mutations within eight MSI target genes were analyzed in the 12 cell lines and nine childhood acute lymphoblastic leukemia (ALL) samples with MSI. Six cell lines (50%) showed mutations within the coding repeats of the BLM, caspase-5, TCF-4, and PTEN genes. No mutations were identified in the nine childhood ALL samples with MSI. This is the first report that describes mutations of these genes in hematological malignancies. Mutations, presumably caused by an abnormality of the DNA repair genes, may be selected for during the establishment of cell lines.

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