Avatrombopag in the Treatment of Adult Immune Thrombocytopenia With Autoantibodies

NCT ID: NCT04993885

Last Updated: 2025-02-24

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: PHASE2
• Total Enrollment: 52 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2021-09-01
• Study Completion Date: 2025-09-30

Brief Summary

This prospective, open-label, single-center, one-arm clinical trial aims at evaluating the efficacy and safety of avatrombopag in Chinese adult Immune Thrombocytopenia (ITP) patients with autoantibodies fail (due to intolerance or resistance) to eltrombopag or herombopag treatment.

Detailed Description

This prospective, open-label, single-center, one-arm clinical trial aims at evaluating the efficacy and safety of avatrombopag in Chinese adult ITP patients with autoantibodies fail (due to intolerance or resistance) to eltrombopag or herombopag treatment.

The subjects include ITP secondary to connective tissue diseases (including but not limited to systemic lupus erythematosus, Sjogren's syndrome and rheumatoid arthritis), primary ITP with positive antinuclear antibody but not up to the diagnostic criteria of connective tissue diseases, primary Evans syndrome, Evans syndrome secondary to connective tissue diseases, and primary ITP with positive Coomb's test but not up to the diagnostic criteria of Evans syndrome.

Fifty-two eligible subjects will be enrolled in this study. The dose will be adjusted according to the platelet count during the period from week 1 to week 12.

Conditions

Immune Thrombocytopenia; Autoantibodies; Evan Syndrome; Connective Tissue Diseases

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Treatment group

Fifty-two subjects will be enrolled with the indicated treatment dose of avatrombopag

Group Type: EXPERIMENTAL

Avatrombopag

Intervention Type: DRUG

The subjects will receive avatrombopag treatment with an initial dose of 40mg once a day. Platelet counts will be obtained weekly during the first 4 weeks and then every 2 weeks until week 12 after treatment. The dose adjustment range is 20 mg per week to 40 mg per day to maintain the platelet level between 30×10\^9/L and 200×10\^9/L. If the platelet count does not reach to 30×10\^9/L after taking avatrombopag 40mg once a day for 4 consecutive weeks, the treatment will be stopped.

Interventions

Avatrombopag

The subjects will receive avatrombopag treatment with an initial dose of 40mg once a day. Platelet counts will be obtained weekly during the first 4 weeks and then every 2 weeks until week 12 after treatment. The dose adjustment range is 20 mg per week to 40 mg per day to maintain the platelet level between 30×10\^9/L and 200×10\^9/L. If the platelet count does not reach to 30×10\^9/L after taking avatrombopag 40mg once a day for 4 consecutive weeks, the treatment will be stopped.

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

• The patients have provided written informed consent prior to enrollment.
• Men and women greater than or equal to 18 years of age.
• Diagnosed as ITP secondary to connective tissue diseases (including but not limited to systemic lupus erythematosus, Sjogren's syndrome and rheumatoid arthritis), primary ITP with positive antinuclear antibody but not up to the diagnostic criteria of connective tissue diseases, primary Evans syndrome, Evans syndrome secondary to connective tissue diseases, and primary ITP with positive Coomb's test but not up to the diagnostic criteria of Evans syndrome.
• Platelet count<30 ×10^9/L at screening.
• Patients who have previously failed to receive Eltrombopag or Herombopag [poor efficacy (Eltrombopag 75 mg/d or Herombopag 7.5 mg/D, at least 4 weeks), or the efficacy cannot be maintained], or who have contraindications, can not tolerate or refuse Eltrombopag or Herombopag treatment.
• Treatment for ITP (including but not limited to glucocorticoids, recombinant human thrombopoietin, and other thrombopoietin receptor agonists other than Avatrombopag) must be completed before enrollment, or the dose must be stable or in a phase of reduction within 2 weeks before enrollment.
• Effective contraceptive measures will be taken during the clinical trial.

Exclusion Criteria

• Patients with active thyroid disease requiring treatment.
• Patients with any prior history of arterial or venous thrombosis within 3 months, and with any of the following risk factors: cancer, Factor V Leiden, ATIII deficiency, or patients who are using anticoagulants or antiplatelet drugs at the beginning of screening.
• Those who had received rituximab within 3 months.
• Patients who had failed to respond to the previous use of Avatrombopag (40mg once a day for more than 4 weeks).
• Subjects known to be allergic to Avatrombopag or any of its excipients.
• Patients who had received splenectomy within 3 months or have splenectomy plan within 3 months.
• Patients with lupus encephalopathy or lupus nephritis.
• Patients with cataract.
• Patients with infectious fever (including but not limited to pulmonary infection) within 1 month or with active infection during screening.
• Existing hepatitis B virus, hepatitis C virus replication or HIV infection.
• Severe liver dysfunction (alanine aminotransferase or glutamic oxaloacetic transaminase > 3×ULN).
• Patients with severe cardiac or pulmonary dysfunction.
• Severe renal damage (creatinine clearance < 30 ml/min).
• There are surgical planners during the study.
• History of psychiatric disorder.
• Pregnant or lactating women or those planning to be pregnant during the trial.
• Patients with a history of drug/alcohol abuse (within 2 years before the study).
• Patients that had participated in other experimental researches within one month before enrollment.
• Any other circumstances that the investigator considers that the patient is not suitable to participate in the trial.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Institute of Hematology & Blood Diseases Hospital, China

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Lei Zhang, M.D.

Role: PRINCIPAL_INVESTIGATOR

Institute of Hematology & Blood Diseases Hospital, China

Locations

Institute of Hematology & Blood Diseases Hospital

Tianjin, Tianjin Municipality, China

Site Status: RECRUITING

Countries

China

Central Contacts

Rongfeng Fu, M.D.

Role: CONTACT

furongfeng@ihcams.ac.cn

+862223909009

Lei Zhang, M.D.

Role: CONTACT

zhanglei1@ihcams.ac.cn

+862223909240

Facility Contacts

Rongfeng Fu, MD

Role: primary

furongfeng@ihcams.ac.cn

+862223909009

Lei Zhang, MD

Role: backup

zhanglei1@ihcams.ac.cn

+862223909240

Other Identifiers

IIT2021033

Identifier Type: -

Identifier Source: org_study_id