LODACA: Efficacy and Safety of Low-dose Decitabine in Refractory Aplastic Anemia

Institute of Hematology & Blood Diseases Hospital (Other)
Overall Status
CT.gov ID
Anticipated Duration (Months)
Patients Per Site Per Month

Study Details

Study Description

Brief Summary

This is a phase 2, single-center, single-arm, open-label trial. Simon's two-stage design is performed to evaluate the efficacy of low-dose Decitabine in refractory aplastic anemia.

Condition or DiseaseIntervention/TreatmentPhase
Phase 2

Study Design

Study Type:
Anticipated Enrollment :
45 participants
Intervention Model:
Single Group Assignment
None (Open Label)
Primary Purpose:
Official Title:
Efficacy and Safety of Low-dose Decitabine in Refractory Aplastic Anemia (LODACA): a Phase 2, Single-arm, Open-label Study
Actual Study Start Date :
Apr 22, 2021
Anticipated Primary Completion Date :
Dec 31, 2024
Anticipated Study Completion Date :
Mar 31, 2025

Arms and Interventions

Experimental: Decitabine

Subjects will receive low-dose decitabine for 4 cycles and for another 6 cycles in extension study for patients achieving response during the first 4 cycles.

Drug: Decitabine
Demethylating agents

Outcome Measures

Primary Outcome Measures

  1. Proportion of subjects achieving a hematological response (any of the platelet response, erythroid response, and neutrophil response) after 4 cycles of low-dose decitabine [At 20 weeks]

Secondary Outcome Measures

  1. Incidence of drug-related adverse events [Within 52 weeks]

  2. Proportion of subjects achieving a hematological response (any of the platelet response, erythroid response, and neutrophil response) [Within 52 weeks]

  3. Proportion of subjects with transfusion independence or decreased transfusion requirement [Within 52 weeks]

  4. Absolute changes in blood cell count [Within 52 weeks]

  5. The utility score of EQ-5D-5L questionnaire [Baseline, 20 weeks, 52 weeks]

    Health-related quality of life is measure by the EQ-5D-5L questionnaire.

  6. Time from the first decitabine to hematologic response [Within 20 weeks]

  7. Duration of hematologic response [Within 52 weeks]

  8. Proportion of relapse [Within 52 weeks]

  9. Proportion of clonal evolution [Within 52 weeks]

Eligibility Criteria


Ages Eligible for Study:
12 Years and Older
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Inclusion criteria:
Subjects eligible for enrollment in the study should meet all of following criteria:
  1. Diagnosis of acquired aplastic confirmed by peripheral blood and bone-marrow examinations.

  2. Refractory to standard first-line immunosuppressive therapy for at least 6 months, including the combination of rabbit anti-thymocyte globulin (rATG) or porcine anti-lymphocyte globulin (pALG) and cyclosporine (CsA); or ineligible for rATG/ pALG and refractory to CsA alone.

  3. Persistent decrease of blood cell count, including platelet <30×109/L, and/or hemoglobin <90g/L, and/or absolute neutrophil count <0.5×109/L.

  4. Age ≥12 years old.

  5. An Eastern Cooperative Oncology Group performance status score of 0 to 2 at screening.

  6. Patients or their legally authorized representatives who have provided written informed consent of their free will to participate in this study.

Exclusion criteria:

Subjects must be excluded from participating in this study if they meet any of the following criteria:

  1. Diagnosis of inherited bone marrow failure disorders.

  2. Bone marrow reticulin grade of ≥2.

  3. Having a plan to take thrombopoietin (TPO) receptor agonists.

  4. Having a plan to undergo hematopoietic stem cell transplantation within 1 year.

  5. Subjects with hemolytic paroxysmal nocturnal hemoglobinuria clone.

  6. Having abnormalities of cytogenetic abnormalities related to myelodysplastic syndrome except for +8 or 20q- or -Y.

  7. Previous or concurrent active malignancies with chemoradiotherapy, except localized tumors diagnosed more than one year previously and treated surgically with curative intent.

  8. Cytopenias secondary to any other non-hematological disorders (e.g., liver cirrhosis, active connective tissue disease, or chronic persistent infectious diseases).

  9. Active infection not adequately responding to appropriate therapy.

  10. Positive for anti-human immunodeficiency virus antibodies, or current infection of hepatitis B virus or hepatitis C virus at screening.

  11. Concurrent condition of acute hemorrhage in gastrointestinal tract or respiratory tract, or central nervous system.

  12. Dysfunction of liver: Alanine aminotransferase or aspartate aminotransferase or total bilirubin is more than 2.0 times the upper limit of laboratory normal range.

  13. Dysfunction of renal: creatinine clear rate is less than 30ml/min.

  14. Clinically significant dysfunction of heart: class Ⅲ or Ⅳ of the New York Heart Association classification.

  15. Uncontrolled diabetes mellitus.

  16. History of congestive heart failure, unstable angina pectoris, myocardial infarction, arterial or venous thrombosis within one year before enrollment.

  17. Lactating or pregnant women or patients who have no intention of using oral contraceptives or birth control.

  18. Subjects with psychiatric history or severe cerebrovascular disease with cognitive disorder.

  19. Participating in other clinical trials within 4 weeks before enrollment.

  20. Hypersensitivity to decitabine or its components.

  21. A history of decitabine, azacitidine, or other demethylation agents.

  22. Receiving TPO-receptor agonists within 1 month before enrollment (other than patients who are treated with TPO-receptor agonists and have no response after at least 4 months treatment).

  23. Patients who are considered to be ineligible for the study by the investigator for reasons other than above.

Contacts and Locations


SiteCityStateCountryPostal Code
1Regenerative Medicine CenterTianjinTianjinChina

Sponsors and Collaborators

  • Institute of Hematology & Blood Diseases Hospital


None specified.

Study Documents (Full-Text)

None provided.

More Information


None provided.
Responsible Party:
Jun Shi, Director of Regenerative Medicine Clinic Center, Institute of Hematology & Blood Diseases Hospital
ClinicalTrials.gov Identifier:
Other Study ID Numbers:
  • IHBDH-DAC202105
First Posted:
Apr 22, 2021
Last Update Posted:
May 12, 2021
Last Verified:
May 1, 2021
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD:
Studies a U.S. FDA-regulated Drug Product:
Studies a U.S. FDA-regulated Device Product:
Additional relevant MeSH terms:

Study Results

No Results Posted as of May 12, 2021