The Safety and Efficacy of Zanubrutinib in Refractory/Relapsed Autoimmune Hemolytic Anemia

Phase 2

Recruiting

• Conditions: Refractory/Relapsed Autoimmune Hemolytic Anemia
• Interventions: Drug: Zanubrutinib

• Registration Number: NCT06021977
• Lead Sponsor: Institute of Hematology & Blood Diseases Hospital, China

Brief Summary

The sample size of this study is calculated based on Simon's two-stage design. The first stage of the study enrolled a cohort of 12 patients. If after 12 weeks at least 6 patients achieved a response, then enrollment was expanded to a total of 26 patients. The null hypothesis was unaccepted if more than 14 of 26 patients achieved the response. Accounting for a 20% dropout rate, the estimated final sample size was 33 patients.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2023-08-27
• Study First Submitted QC: 2023-08-27
• Study Start: 2023-09-01
• Study First Posted: 2023-09-01
• Status Verified: 2023-11
• Last Update Submitted: 2023-11-26
• Last Update Posted: 2023-11-29
• Primary Completion: 2025-09-30
• Study Completion: 2025-12-31

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 33

Inclusion Criteria

• Age from 6 to 70
• Diagnosis of Coombs-negative AIHA
• Diagnosis of warm AIHA, mixed AIHA or Evans syndrome.
• Meets the criteria of relapsed / refractory AIHA
• ECOG ≤ 3
• Willing and able to comply with the requirements for this study and written informed consent.

Exclusion Criteria

• Diagnosis of any of the following diseases: Cold agglutinin disease, cold agglutinin syndrome, mixed AIHA, paroxysmal cold hemoglobinuria (PCH).
• Diagnosis of active stage of connective tissue disease.
• History of lymphoproliferative tumors or any other malignant.
• Diagnosis of other inherited or acquired hemolytic diseases.
• Secondary AIHA caused by drugs or infection.
• Previously received organ or stem cell transplantation.
• History of thrombosis or organ infarction.
• Received rituximab within 8 weeks before enrollment.
• Previously treated with BTK inhibitor ≥ 2 weeks.
• Received low-molecular-weight heparin or warfarin within 1 week before enrollment and need to continue the drug treatment.
• Received CYP3A4 Enzyme Inhibitors or Inducers within 1 week before enrollment and need to continue the drug treatment.
• Uncontrolled systemic fungal, bacterial, or viral infection (defined as ongoing signs/symptoms related to the infection without improvement despite appropriate antibiotics, antiviral therapy, and/or other treatment), known human immunodeficiency virus (HIV), known evidence of active infectious hepatitis B, and/or known evidence of active hepatitis C.
• Any severe and/or uncontrolled medical conditions: refractory hypertension, clinically significant cardiac diseases, renal diseases, liver diseases and metabolic diseases, etc.
• History of mental illness.
• Participation in another clinical trial within 4 weeks before the start of this trial.
• Pregnant or breast-feeding patients.
• Patients considered ineligible for the study by the investigator for reasons other than the above.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Zanubrutinib	Zanubrutinib	Each recruited subject will accept Zanubrutinib treatment.

Primary Outcome Measures

Name	Time	Method
Overall response rate	within 12 weeks	The percentage of patients achieved complete response, complete response with incomplete hemolysis recovery, and partial response.

Secondary Outcome Measures

Name	Time	Method
Incidence of adverse events and severe adverse events	within 24 weeks
Relapse free survival rate	within 48 weeks

Trial Locations

Locations (1)

Regenerative Medicine Center; 🇨🇳 Tianjin, Tianjin, China