Frontline Oral Arsenic Trioxide for APL

The investigators have formulated an oral preparation of arsenic trioxide (oral-ATO), and shown that it is efficacious for APL in R1, inducing CR2 in more than 90% of patients \[8,9\]. Furthermore, in an effort to prevent relapse, the investigators have moved oral-ATO forward to the maintenance of CR1. This strategy results in favorable overall-survival (OS) and leukemia-free-survival (LFS) \[10\], implying that prolonged treatment with oral-ATO may prevent relapses. Current protocols have incorporated i.v.-ATO in the treatment of newly-diagnosed APL \[11-15\]. For regimens comprising oral-ATO, ATRA and chemotherapy, 5-year OS in excess of 90% is achieved \[11-15\]. The investigators have also published long-term data showing the use of oral-ATO is highly effective and safe in the relapsed and frontline settings \[16,17\]. In this study, the investigators evaluate the use of oral-ATO and ATRA based induction regimens in newly diagnosed patients with APL with no of minimal chemotherapy in a prospective multicentre phase 2 study.

Sex

All

Inclusion Criteria:

1. Newly diagnosed APL with t(15;17)(q24;q21) or acute myeloid leukaemia (AML) with variant RARA translocation according to the World Health Organization (WHO) Classification 2022
2. Ability and willingness to comply with the study procedures and restrictions
3. Voluntary written informed consent

Exclusion Criteria:

1. ECOG performance score \>2
2. Decompensated heart failure with left-ventricular ejection fraction of less than 40% and global hypokinesia on echocardiogram.
3. Prolonged corrected QT interval (QTc) ≥ 500ms, in the absence of electrolyte disturbances and medications known to prolong QTc
4. Significant liver function derangement (Bilirubin \> 3 times upper limit normal and/or ALT \> 5 times upper limit of normal)
5. Glomerular filtration rate (GRF) by Cockcroft-Gault formula or eGFR (MDRD) of less than 30mL/min in adults (aged ≥ 18) or Creatinine clearance \< 50ml/min/1.73m2 in paediatric and adolescent patients (Age ≤ 17)
6. Female subject who is lactating or has positive pregnancy test result prior to the first dose of study drug

• BACKGROUNDTallman MS, Altman JK. How I treat acute promyelocytic leukemia. Blood. 2009 Dec 10;114(25):5126-35. doi: 10.1182/blood-2009-07-216457. PMID 19797519
• BACKGROUNDTallman MS, Andersen JW, Schiffer CA, Appelbaum FR, Feusner JH, Woods WG, Ogden A, Weinstein H, Shepherd L, Willman C, Bloomfield CD, Rowe JM, Wiernik PH. All-trans retinoic acid in acute promyelocytic leukemia: long-term outcome and prognostic factor analysis from the North American Intergroup protocol. Blood. 2002 Dec 15;100(13):4298-302. doi: 10.1182/blood-2002-02-0632. Epub 2002 Aug 15. PMID 12393590
• BACKGROUNDLengfelder E, Haferlach C, Saussele S, Haferlach T, Schultheis B, Schnittger S, Ludwig WD, Staib P, Aul C, Gruneisen A, Kern W, Reichle A, Serve H, Berdel WE, Braess J, Spiekermann K, Wormann B, Sauerland MC, Heinecke A, Hiddemann W, Hehlmann R, Buchner T; German AML Cooperative Group. High dose ara-C in the treatment of newly diagnosed acute promyelocytic leukemia: long-term results of the German AMLCG. Leukemia. 2009 Dec;23(12):2248-58. doi: 10.1038/leu.2009.183. Epub 2009 Sep 10. PMID 19741727
• BACKGROUNDLo-Coco F, Avvisati G, Vignetti M, Breccia M, Gallo E, Rambaldi A, Paoloni F, Fioritoni G, Ferrara F, Specchia G, Cimino G, Diverio D, Borlenghi E, Martinelli G, Di Raimondo F, Di Bona E, Fazi P, Peta A, Bosi A, Carella AM, Fabbiano F, Pogliani EM, Petti MC, Amadori S, Mandelli F; Italian GIMEMA Cooperative Group. Front-line treatment of acute promyelocytic leukemia with AIDA induction followed by risk-adapted consolidation for adults younger than 61 years: results of the AIDA-2000 trial of the GIMEMA Group. Blood. 2010 Oct 28;116(17):3171-9. doi: 10.1182/blood-2010-03-276196. Epub 2010 Jul 19. PMID 20644121
• BACKGROUNDKelaidi C, Chevret S, De Botton S, Raffoux E, Guerci A, Thomas X, Pigneux A, Lamy T, Rigal-Huguet F, Meyer-Monard S, Chevallier P, Maloisel F, Deconinck E, Ferrant A, Fegueux N, Ifrah N, Sanz M, Dombret H, Fenaux P, Ades L. Improved outcome of acute promyelocytic leukemia with high WBC counts over the last 15 years: the European APL Group experience. J Clin Oncol. 2009 Jun 1;27(16):2668-76. doi: 10.1200/JCO.2008.18.4119. Epub 2009 May 4.