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- W4253256552 endingPage "802" @default.
- W4253256552 startingPage "793" @default.
- W4253256552 abstract "Retinoic acid receptor (RAR) is the target of several chromosomal translocations associated with acute promyelocytic leukemias (APLs). These rearrangements fuse RAR to different partner genes creating the chimeric proteins: PML-RAR, PLZF-RAR, and NPM-RAR. Although the vast majority of APLs respond to retinoic acid therapy, those associated with PLZF-RAR are resistant. We have used retroviruses to express PML-RAR, PLZF-RAR, NPM-RAR, RAR403 (a dominant negative mutant of RAR), and wild-type RAR in murine bone marrow progenitors and found that all of these constructs blocked differentiation and led to the immortalization of myeloid progenitors. This cellular transformation is specific to an alteration of the RAR pathway because overexpression of RARβ, RARγ, or RXR did not result in similar growth perturbations. Pharmacological doses of RA induced differentiation and inhibited proliferation of cells transformed with either of the APL fusion genes, including PLZF-RAR, whereas physiological retinoic acid concentrations were sufficient to reverse the phenotype of cells transformed with wild-type RAR. The cellular responses to retinoic acid were accompanied by a sharp decrease in the amount of the RAR-fusion proteins expressed in the cells. Our findings suggest that the oncogenicity of RAR-fusion proteins results from their nature to behave as unliganded RAR in the presence of physiological concentrations of retinoic acid." @default.
- W4253256552 created "2022-05-12" @default.
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- W4253256552 date "1999-07-15" @default.
- W4253256552 modified "2023-09-28" @default.
- W4253256552 title "Overexpression of Wild-Type Retinoic Acid Receptor (RAR) Recapitulates Retinoic Acid-Sensitive Transformation of Primary Myeloid Progenitors by Acute Promyelocytic Leukemia RAR-Fusion Genes" @default.
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- W4253256552 doi "https://doi.org/10.1182/blood.v94.2.793.414k43_793_802" @default.
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