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The theory of APL
F Piazza1, C Gurrieri, P P Pandolfi
1Molecular Biology Program, Department of Pathology, Memorial Sloan-Kettering Cancer Center, Sloan-Kettering Division, Graduate School of Medical Sciences, Cornell University, 1275 York Avenue, New York, New York, NY 10021, USA.
Abstract:
Acute promyelocytic leukemia (APL) is associated with reciprocal and balanced chromosomal translocations always involving the Retinoic Acid Receptor alpha (RARalpha) gene on chromosome 17 and variable partner genes (X genes) on distinct chromosomes. RARalpha fuses to the PML gene in the vast majority of APL cases, and in a few cases to the PLZF, NPM, NuMA and STAT5b genes. As a consequence, X-RARalpha and RARalpha-X fusion genes are generated encoding aberrant fusion proteins that can interfere with X and/or RARalpha function. Here we will review the relevant conclusions and the open questions that stem from a decade of in vivo analysis of APL pathogenesis in the mouse in transgenic and knock-out models.