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A novel retinoic acid-resistant acute promyelocytic leukemia model in vitro and in vivo (review).

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Differentiation-inducing therapy by all-trans retinoic acid (RA) is now a standard therapy in patients with acute promyelocytic leukemia (APL). Nearly all patients achieve complete remission by the treatment of all-trans RA, however, clinical remissions are usually of brief duration, and these patients often develop RA-resistant disease. The mechanisms of RA-resistance in APL cells are poorly understood and most clinical approaches have not been successful in overcoming RA-resistance. We have recently established a novel APL cell line (UF-1) with RA-resistant features. In addition, we have established human GM-CSF-producing transgenic (hGMTg) SCID mice system. UF-1 cells were inoculated either intraperitoneally or subcutaneously into hGMTg SCID mice and made the first RA-resistant murine APL model. These RA-resistant APL model systems in vitro and in vivo may be useful for investigating the molecular studies on the block of leukemic cell differentiation and as means to investigate the mechanisms of RA-resistance. Moreover, this murine model system will be important for developing novel therapeutic strategies in RA-resistant APL.
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Document Type: Research Article

Affiliations: Division of Hematology, Keio University School of Medicine, Tokyo 160-8582, Japan.

Publication date: October 1, 1999

More about this publication?
  • The International Journal of Molecular Medicine is a monthly, peer-reviewed journal devoted to the publication of high quality studies related to the molecular mechanisms of human disease. The journal welcomes research on all aspects of molecular and clinical research, ranging from biochemistry to immunology, pathology, genetics, human genomics, microbiology, molecular pathogenesis, molecular cardiology, molecular surgery and molecular psychology.

    The International Journal of Molecular Medicine aims to provide an insight for researchers within the community in regard to developing molecular tools and identifying molecular targets for the diagnosis and treatment of a diverse number of human diseases.
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