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Acute Promyelocytic LeukemiaNCT04251754

The Acute Promyelocytic Leukaemia Asian Consortium (APL-AC) Project

An observational study of Acute Promyelocytic Leukemia, run by The University of Hong Kong at 1 site in Hong Kong.

Unknown status

Status not confirmed. The sponsor has not verified this record for over two years, so it may be out of date.

Official record
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Trial summary

There is currently lack of collaborative data on the epidemiology, clinicopathologic features and treatment outcome of newly diagnosed and relapsed APL in Asia. In addition, there is lack of data comparing oral- As2O3-based regimens with other treatment approaches, including intravenous As2O3,in the frontline or… Read more about this study

Who is it for?
Any age
Conditions the study is for
Acute Promyelocytic Leukemia
How many people
1,000 participants
Where
1 siteHong Kong
Study dates
2 Feb 2020to Jun 2025
Phase
Observational
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages Any age
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Study population: This is a retrospective-prospective cohort study for all patients diagnosed with acute promyelocytic leukaemia since 2010 in Hong Kong and participating countries in Asia.

Who may be able to join

  • Patients aged 18 or above
  • Acute promyelocytic leukaemia with PML/RARA
  • Acute myeloid leukaemia with variant RARA translocation

Who cannot join

  • -Acute myeloid leukaemia without PML/RARA or variant RARA translocation

Trial locations and contacts

1 site in 1 country.

Harinder Singh Harry Gill, MD contact

+852 22554542

gillhsh@hku.hk

Hong Kong1 site, 1 recruiting

  • Department of Medicine, the University of Hong Kong, Queen Mary Hospital

    Hong Kong

    Harinder Singh Harry Gill, MD, +852 22554254, gillhsh@hku.hk

    Recruiting

Other trials in Hong Kong

About this study

There is currently lack of collaborative data on the epidemiology, clinicopathologic features and treatment outcome of newly diagnosed and relapsed APL in Asia. In addition, there is lack of data comparing oral- As2O3-based regimens with other treatment approaches, including intravenous As2O3,in the frontline or relapsed setting. With the long-term data of oral-As2O3 based regimen for APL available from Hong Kong, retrospective and prospective comparison with other treatment approaches in other Asian countries will generate important information to pave the way for widespread application of oral-As2O3 outside Hong Kong.

Read the detailed description

Acute promyelocytic leukemia (APL) is characterized by t(15;17)(q24;21) and the fusion gene PML-RARA.1 In newly-diagnosed patients, optimal supportive care together with the use of all-trans retinoic acid (ATRA) and chemotherapy results in first complete remission (CR1) in excess of 90% with durable remissions in about 80% of patients.Arsenic trioxide (As2O3) given intravenously (i.v.-As2O3) is highly efficacious for APL in first relapse (R1), inducing second complete remission (CR2) in more than 90% of patients. We have formulated an oral preparation of As2O3 (oral-As2O3), and shown that it is efficacious for APL in R1, giving CR2 rates of more than 90% in both adults and children. For patients in CR2, a 2-year maintenance with oral-As2O3 results in durable remission and long-term survivals in more than 60% and 70% of patients respectively strongly suggesting that hematopoietic stem cell transplantation (HSCT) could be obviated in such patients. With these results, we implemented oral-As2O3 maintenance in CR1 in Hong Kong and demonstrated very favourable overall-survival (OS) and leukemia-free-survival (LFS). This implied that that prolonged oral-As2O3 treatment may prevent relapses.

Meanwhile, i.v.-As2O3 has also been tested in the frontline treatment of newly-diagnosed APL.These studies employed different strategies, recruiting a mixture of low-, intermediate- to high-risk patients and placing i.v.-As2O3 in induction and/or consolidation. During induction, i.v.-As2O3 was combined with ATRA, with additional gemtuzumab ozogamicin (an anti-CD33 immunoconjugate) or chemotherapy. During consolidation, i.v.-As2O3 was combined with conventional chemotherapy. Their results all indicated that frontline use of i.v.-As2O3 in induction and/or consolidation improved the outcome of newly-diagnosed APL patients. However, with quite diverse protocols and the enrollment in some studies of only patients with low to intermediate risks, and in other studies of patients with all risk categories; the optimal strategy of employing i.v.-As2O3 in newly-diagnosed APL remains to be defined. We have tested oral- As2O3 in combination with ATRA, ascorbic acid (AAA) with daunorubicin in both low-risk and high-risk APL with 3 year LFS and OS of both 100%.

With the impressive results of oral-As2O3-based regimen in newly diagnosed and relapsed APL, an important future perspective is the application of this relatively economical and convenient approach to the treatment of patients with APL in Asia and other developing countries around the world where the cost and availability of intravenous formulation of As2O3 is a concern. There is currently lack of collaborative data on the epidemiology, clinicopathologic features and treatment outcome of newly diagnosed and relapsed APL in Asia. In addition, there is lack of data comparing oral- As2O3-based regimens with other treatment approaches, including intravenous As2O3,in the frontline or relapsed setting. With the long-term data of oral-As2O3 based regimen for APL available from Hong Kong, retrospective and prospective comparison with other treatment approaches in other Asian countries will generate important information to pave the way for widespread application of oral-As2O3 outside Hong Kong.

Medical subject headings
Leukemia, Promyelocytic, Acute

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Survivals

    The primary outcome measures in this study include the overall survival (OS) and the relapse-free survival (RFS). OS is defined as the time (in months) from diagnosis to death from any cause (event) or latest follow-up. RFS is defined as the time from first complete remission (CR)/complete remission with incomplete haematological recovery (CRi) to first hamatologic relapse or molecular relapse (R1) (event), death from any cause (event) or latest follow-up (censor). CR, CRi, treatment failure, haematologic relapse are defined according to the 2017 European LeukemiaNet (ELN) recommendations. A molecular relapse is defined as recurrence of measurable residual disease (MRD) by reverse-transcriptase polymerase chain reaction (RT-PCR) or real-time quantitative PCR (qRT PCR). A single MRD positivity must be confirmed by performing the molecular assay within 2 weeks.

    Measured: 60 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted5 Feb 2020
  2. Study start2 Feb 2020
  3. Primary completionJan 2025 (estimated)
  4. Study completionJun 2025 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Other
Enrolment
1,000 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04251754
Sponsor's protocol ID
APLAC001
Status last verified
Oct 2022
First submitted
30 Jan 2020
Last updated
4 Oct 2022
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Tallman MS, Altman JK. How I treat acute promyelocytic leukemia. Blood. 2009 Dec 10;114(25):5126-35. doi: 10.1182/blood-2009-07-216457.

    PubMed 19797519

  • Tallman 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.

    PubMed 12393590

  • Lengfelder 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.

    PubMed 19741727

  • Lo-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.

    PubMed 20644121

  • Kelaidi 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.

    PubMed 19414681

  • Niu C, Yan H, Yu T, Sun HP, Liu JX, Li XS, Wu W, Zhang FQ, Chen Y, Zhou L, Li JM, Zeng XY, Yang RR, Yuan MM, Ren MY, Gu FY, Cao Q, Gu BW, Su XY, Chen GQ, Xiong SM, Zhang TD, Waxman S, Wang ZY, Chen Z, Hu J, Shen ZX, Chen SJ. Studies on treatment of acute promyelocytic leukemia with arsenic trioxide: remission induction, follow-up, and molecular monitoring in 11 newly diagnosed and 47 relapsed acute promyelocytic leukemia patients. Blood. 1999 Nov 15;94(10):3315-24.

    PubMed 10552940

  • Soignet SL, Frankel SR, Douer D, Tallman MS, Kantarjian H, Calleja E, Stone RM, Kalaycio M, Scheinberg DA, Steinherz P, Sievers EL, Coutre S, Dahlberg S, Ellison R, Warrell RP Jr. United States multicenter study of arsenic trioxide in relapsed acute promyelocytic leukemia. J Clin Oncol. 2001 Sep 15;19(18):3852-60. doi: 10.1200/JCO.2001.19.18.3852.

    PubMed 11559723

  • Au WY, Li CK, Lee V, Yuen HL, Yau J, Chan GC, Ha SY, Kwong YL. Oral arsenic trioxide for relapsed acute promyelocytic leukemia in pediatric patients. Pediatr Blood Cancer. 2012 Apr;58(4):630-2. doi: 10.1002/pbc.23306. Epub 2011 Sep 2.

    PubMed 21898784

  • Gill H, Yim R, Lee HKK, Mak V, Lin SY, Kho B, Yip SF, Lau JSM, Li W, Ip HW, Hwang YY, Chan TSY, Tse E, Au WY, Kumana CR, Kwong YL. Long-term outcome of relapsed acute promyelocytic leukemia treated with oral arsenic trioxide-based reinduction and maintenance regimens: A 15-year prospective study. Cancer. 2018 Jun 1;124(11):2316-2326. doi: 10.1002/cncr.31327. Epub 2018 Mar 26.

    PubMed 29579321

  • Au WY, Kumana CR, Lee HK, Lin SY, Liu H, Yeung DY, Lau JS, Kwong YL. Oral arsenic trioxide-based maintenance regimens for first complete remission of acute promyelocytic leukemia: a 10-year follow-up study. Blood. 2011 Dec 15;118(25):6535-43. doi: 10.1182/blood-2011-05-354530. Epub 2011 Oct 12.

    PubMed 21998212

  • Hu J, Liu YF, Wu CF, Xu F, Shen ZX, Zhu YM, Li JM, Tang W, Zhao WL, Wu W, Sun HP, Chen QS, Chen B, Zhou GB, Zelent A, Waxman S, Wang ZY, Chen SJ, Chen Z. Long-term efficacy and safety of all-trans retinoic acid/arsenic trioxide-based therapy in newly diagnosed acute promyelocytic leukemia. Proc Natl Acad Sci U S A. 2009 Mar 3;106(9):3342-7. doi: 10.1073/pnas.0813280106. Epub 2009 Feb 18.

    PubMed 19225113

  • Lo-Coco F, Avvisati G, Vignetti M, Thiede C, Orlando SM, Iacobelli S, Ferrara F, Fazi P, Cicconi L, Di Bona E, Specchia G, Sica S, Divona M, Levis A, Fiedler W, Cerqui E, Breccia M, Fioritoni G, Salih HR, Cazzola M, Melillo L, Carella AM, Brandts CH, Morra E, von Lilienfeld-Toal M, Hertenstein B, Wattad M, Lubbert M, Hanel M, Schmitz N, Link H, Kropp MG, Rambaldi A, La Nasa G, Luppi M, Ciceri F, Finizio O, Venditti A, Fabbiano F, Dohner K, Sauer M, Ganser A, Amadori S, Mandelli F, Dohner H, Ehninger G, Schlenk RF, Platzbecker U; Gruppo Italiano Malattie Ematologiche dell'Adulto; German-Austrian Acute Myeloid Leukemia Study Group; Study Alliance Leukemia. Retinoic acid and arsenic trioxide for acute promyelocytic leukemia. N Engl J Med. 2013 Jul 11;369(2):111-21. doi: 10.1056/NEJMoa1300874.

    PubMed 23841729

  • Abaza Y, Kantarjian H, Garcia-Manero G, Estey E, Borthakur G, Jabbour E, Faderl S, O'Brien S, Wierda W, Pierce S, Brandt M, McCue D, Luthra R, Patel K, Kornblau S, Kadia T, Daver N, DiNardo C, Jain N, Verstovsek S, Ferrajoli A, Andreeff M, Konopleva M, Estrov Z, Foudray M, McCue D, Cortes J, Ravandi F. Long-term outcome of acute promyelocytic leukemia treated with all-trans-retinoic acid, arsenic trioxide, and gemtuzumab. Blood. 2017 Mar 9;129(10):1275-1283. doi: 10.1182/blood-2016-09-736686. Epub 2016 Dec 21.

    PubMed 28003274

  • Iland HJ, Bradstock K, Supple SG, Catalano A, Collins M, Hertzberg M, Browett P, Grigg A, Firkin F, Hugman A, Reynolds J, Di Iulio J, Tiley C, Taylor K, Filshie R, Seldon M, Taper J, Szer J, Moore J, Bashford J, Seymour JF; Australasian Leukaemia and Lymphoma Group. All-trans-retinoic acid, idarubicin, and IV arsenic trioxide as initial therapy in acute promyelocytic leukemia (APML4). Blood. 2012 Aug 23;120(8):1570-80; quiz 1752. doi: 10.1182/blood-2012-02-410746. Epub 2012 Jun 19.

    PubMed 22715121

  • Platzbecker U, Avvisati G, Cicconi L, Thiede C, Paoloni F, Vignetti M, Ferrara F, Divona M, Albano F, Efficace F, Fazi P, Sborgia M, Di Bona E, Breccia M, Borlenghi E, Cairoli R, Rambaldi A, Melillo L, La Nasa G, Fiedler W, Brossart P, Hertenstein B, Salih HR, Wattad M, Lubbert M, Brandts CH, Hanel M, Rollig C, Schmitz N, Link H, Frairia C, Pogliani EM, Fozza C, D'Arco AM, Di Renzo N, Cortelezzi A, Fabbiano F, Dohner K, Ganser A, Dohner H, Amadori S, Mandelli F, Ehninger G, Schlenk RF, Lo-Coco F. Improved Outcomes With Retinoic Acid and Arsenic Trioxide Compared With Retinoic Acid and Chemotherapy in Non-High-Risk Acute Promyelocytic Leukemia: Final Results of the Randomized Italian-German APL0406 Trial. J Clin Oncol. 2017 Feb 20;35(6):605-612. doi: 10.1200/JCO.2016.67.1982. Epub 2016 Oct 31.

    PubMed 27400939

Questions about this trial

What is this clinical trial studying?

An observational study of Acute Promyelocytic Leukemia, run by The University of Hong Kong at 1 site in Hong Kong.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: status not confirmed, as of the sponsor's last update on 4 Oct 2022. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Hong Kong. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

Contact Harinder Singh Harry Gill, MD (+852 22554542, gillhsh@hku.hk), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Survivals (time frame: 60 months). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04251754, which also lists 19 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Oct 2022.

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