Acute Promyelocytic Leukemia Clinical Trial
Official title:
Optimum Induction Therapy of Low-risk Acute Promyelocytic Leukemia With All Oral Drugs
Despite the high cure probability for acute promyelocytic leukemia (APL), a minority of patients will relapse and the risk factors for relapse are unclear. The goal of this clinical trial is to compare the effectiveness and safety of induction of oral all-trans retinoic acid (ATRA) and realgar-indigo naturalis formula (RIF) combined with oral etoposide or daunorubicin as cytoreductive therapies in low-risk APL. The present study was to explored a cytoreduction of an oral etoposide for low-risk APL with dual induction of ATRA and RIF as a high efficacy, low recurrence, and more convenient all-oral regimen.
Despite the high cure probability for low-risk acute promyelocytic leukemia (APL) in the all-trans retinoic acid (ATRA) era, several clinical problems lead to treatment failure, including early death (ED) and relapse. Previously studies by our group and others showed a relapse of 1.0-4.8% for low-risk APL, and the median time to hematological relapse was 20.5 months after a hematological complete remission (CR). Dur to the largely unclear mechanisms of relapse, the investigators previously explored that a drop of promyelocytic leukemia retinoic acid receptor alpha (PML-RARA) transcript level at the end of induction therapy was associated with a subsequent risk of relapse. The investigators and others have indicated that the addition of cytarabine in induction therapy might correlate with lower relapse rate. Whether cytoreduction in induction therapy has prognostic significance in APL, besides its role in leukocytosis, remains unclear. Etoposide is a topoisomerase II inhibitor antitumor agent which is widely used in the treatment of several hematological malignancies. The successful experience in high-risk APL demonstrated the efficacy, safety and convenience of oral etoposide as an alternative cytoreductive agent at the initial stage of induction therapy. Therefore, the present prospective study is conducted to explore the potential role of cytoreduction during induction therapy on prognosis, and further exploit the all-oral induction regimen for low-risk APL with etoposide combined with ATRA plus RIF as the front-line therapy for low-risk APL. ;
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