Efficacy and Safety of Avatrombopag Combined With IST for the Treatment of HAAA and SAA With Abnormal Liver Function

Not Applicable

• Conditions: Aplastic Anemia
• Interventions: Drug: Avatrombopag 20 MG Oral Tablet

• Registration Number: NCT05571332
• Lead Sponsor: Institute of Hematology & Blood Diseases Hospital, China

Brief Summary

This is a multicenter, single-arm clinical study. The objective was to evaluate the efficacy and safety of Avatrombopag combined with IST in very/sever aplastic anemia patients with abnormal liver function or HAAA patients treated for the first time. The design was: Patients received p-ATG for 5 consecutive days (day 1-5), at a dose of 20 mg/kg/day. Cyclosporine 3 mg/kg orally in two divided doses, with cyclosporine trough concentrations maintained at 200-250 ng/ml for 3 months to achieve maximum efficacy, and Avatrombopag, which was administered in the dose of 40 mg orally once daily for a total of 12 weeks. Thirty-nine patients are expected to be enrolled in this study. Evaluation endpoint: complete response rate at 12 weeks of treatment.

Detailed Description

This is a multicenter, single-arm clinical study to evaluate the efficacy and safety of Avatrombopag combined with IST as the first-line regimen for aplastic anemia. The patients are diagnosed as hepatitis associated with very sever/sever aplastic anemia(V/SAA) or V/SAA with abnormal liver function before treatment.

Patients received p-ATG for 5 consecutive days (day 1-5), at a dose of 20 mg/kg/day. CSA is started at 3 mg/kg orally in two doses. Concentrations maintained at 200-250 ng/ml to achieve maximum efficacy and then tapered by 25 mg every 3 months; Avatrombopag: 40 mg orally once daily for a total of 12 weeks. A total of 39 patients were expected to be included.Complete response rate at 12 weeks of treatment and adverse events are the evaluation endpoint.Secondary study endpoints were: ORR at 12 , CRR and ORR at 24 weeks, survival, and clonal evolution in follow-up.

Study Timeline

• Study Start: 2022-06-28
• Status Verified: 2022-08
• Study First Submitted: 2022-08-28
• Study First Submitted QC: 2022-10-04
• Last Update Submitted: 2022-10-04
• Study First Posted: 2022-10-07
• Last Update Posted: 2022-10-07
• Primary Completion: 2023-12-28
• Study Completion: 2024-06-28

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 39

Inclusion Criteria

1. patients with V/SAA with a definite diagnosis.
2. age between 18-70 years, male or female.
3. Subjects must complete all screening assessments as outlined in the trial protocol.
4. Able to swallow or administer the drug orally.
5. No prior application of TPO receptor agonists (including Thrombopoietin, Eltrombopag, Hetrombopag, etc.) or application of TPO receptor agonists for treatment with ≤ 5 total doses and ≤ 7 days of TPO receptor agonist drugs such as Eltrombopag, Hetrombopag, etc.
6. Diagnosis as HAAA or abnormal liver function. ALT and AST more than 1.5 times of upper limit.
7. Informed consent must be signed prior to the start of all specific study procedures, in consideration of the patient's condition, or by a member of the patient's immediate family if the patient's signature is not conducive to the treatment of the condition.

Exclusion Criteria

1. Known diagnosis of congenital hematopoietic failure disorders (e.g. Fanconi anemia) and other causes of allogeneic cytopenias and bone marrow hypoproliferative disorders (e.g. hemolytic PNH, hypoproliferative MDS/AML, autoantibody-mediated allogeneic cytopenias, etc.);
2. Patients with uncontrolled bleeding and/or infection despite standard treatment.
3. Patients with previous history of hematopoietic stem cell transplantation; previous history of thrombosis.
4. Patients with concurrent malignancy or potential cancer on immunosuppressive therapy.
5. Those who are considered unsuitable for enrollment by the investigator.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Avatrombopag+CsA+ p-ATG	Avatrombopag 20 MG Oral Tablet	Patients received p-ATG for 5 consecutive days (day 1-5), at a dose of 20 mg/kg/day. CSA is started at 3 mg/kg orally in two doses. Concentrations maintained at 200-250 ng/ml to achieve maximum efficacy and then tapered by 25 mg every 3 months; Avatrombopag: 40 mg orally once daily for a total of 12 weeks. A total of 39 patients were expected to be included.

Primary Outcome Measures

Name	Time	Method
CR rate at 12 weeks of treatment	12 weeks of treatment	Percentage of the total number of patients receiving treatment who received a complete response at 12 weeks of treatment
ncidence of Treatment-Emergent Adverse Events as assessed by information on Common Toxicity Criteria (CTC) AE grading at 12 weeks of treatment	12 weeks of treatment	Incidence of Treatment-Emergent AE by CTCAE

Secondary Outcome Measures

Name	Time	Method
OR rate at 12 weeks of treatment	12 weeks of treatment	Percentage of the total number of patients receiving treatment who received a response at 12 weeks of treatment

Trial Locations

Locations (1)

Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences; 🇨🇳 Tianjin, Tianjin, China