Cell dynamics during differentiation therapy with all-trans retinoic acid in acute promyelocytic leukemia

International Journal of Hematology
Kazuyuki SatoIkuo Miura

Abstract

The introduction of all-trans retinoic acid (ATRA) has made acute promyelocytic leukemia (APL) a curable disease; however, early death prior to the completion of treatment remains a problem. In quantitative evaluation of response to ATRA treatment, lymphocytes must be excluded as they do not originally have t(15;17). We categorized peripheral blood leukocytes by nuclear morphology into polymorphonuclear cells (PMNs) comprising segmented granulocytes, and non-polymorphonuclear cells (NPMs) which includes lymphocytes, monocytes, band cells, and immature myeloid cells. We consecutively evaluated the ratio of t(15;17)-positive cells using fluorescence in situ hybridization in eight newly diagnosed patients with APL. We confirmed the differentiation of APL cells until cytogenetic complete remission; the association of a decrease of t(15;17)-positive NPMs and an increase of t(15;17)-positive PMNs was followed by a decrease of t(15;17)-positive PMNs. The kinetic pattern of t(15;17)-positive NPMs and PMNs was consistent in most patients, irrespective of leukocyte counts at diagnosis, additional chromosomal changes, and ATRA with or without chemotherapies. Kinetic analysis enables us to evaluate treatment response and the recovery of no...Continue Reading

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Oct 24, 2012·Annals of Hematology·Eva LengfelderUNKNOWN German Acute Myeloid Leukemia Cooperative Group (AMLCG)
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Aug 19, 2014·International Journal of Cancer. Journal International Du Cancer·Julien Ablain, Hugues de Thé
Feb 28, 2016·Annals of Hematology·Ugo Testa, Francesco Lo-Coco

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Citations

Jun 12, 2020·International Journal of Hematology·Hideho HenzanUNKNOWN Fukuoka Blood & Marrow Transplantation Group (FBMTG)

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