Peginterferon Alfa-2b Tested in Essential Thrombocythemia Patients Who Cannot Use Hydroxyurea

Trial details

Who runs it

Xiamen Amoytop Biotech Co., Ltd.

Trial code

NCT06552429

Record updated

17 November 2025

Original description

This is a multicenter, randomized, open-label Phase 2 clinical study. It is aimed to enroll 27 essential thrombocytopenia (ET) patients who are resistant to or intolerant of hydroxyurea(HU). Eligible patients will be randomized to receive either Peginterferon α-2b 135 mcg or Peginterferon α-2b 180 mcg at a ratio of 1:2, and all subjects will go through a target treatment period (Weeks 1 ~ Week 48), an extension treatment period (Weeks 49 ~ Week 96) and a follow-up period (Weeks 97 ~ Week 100). Pharmacokinetics, safety, efficacy will be evaluated.Read full original descriptionShow less

A Phase 2 Multicenter, Randomized, Open-label Study to Evaluate the Pharmacokinetic, Safety and Efficacy of Peginterferon Alfa-2b Injection in Subjects With Essential Thrombocythemia Who Are Resistant to or Intolerant of Hydroxyurea.

This is a multicenter, randomized, open-label Phase 2 clinical study. It is aimed to enroll 27 essential thrombocytopenia (ET) patients who are resistant to or intolerant of hydroxyurea(HU). Eligible patients will be randomized to receive either Peginterferon α-2b 135 mcg or Peginterferon α-2b 180 mcg at a ratio of 1:2, and all subjects will go through a target treatment period (Weeks 1 ~ Week 48), an extension treatment period (Weeks 49 ~ Week 96) and a follow-up period (Weeks 97 ~ Week 100). Pharmacokinetics, safety, efficacy will be evaluated.

Inclusion: Male or female subjects, aged greater or equal to 18 years old at screening; Subjects diagnosed as high-risk ET according to the World Health Organization (WHO) 2016 criteria：1) who is older than 60 years and JAK2V617F positive at screening, 2) or who previously suffered from disease-related thrombosis or hemorrhage; Subjects who have previously received HU for ET, and the time interval between the last HU dose and the first dose of the study drug should not be less than 7 days; Interferon treatment-naïve, and for those who have previously received interferon the the time interval between the last dose of interferon and randomization should not be less than 1 month; Patients with confirmed hydroxyurea resistance or intolerant, as at least one of the following criteria is met:; Platelet count remain greater than 600×10\^9 /L after at least 3 months of HU treatment at a dose ≥2g/d (dose ≥2.5 g/d if subject weight > 80 kg); Platelet count greater than 400*10\^9/L while white blood cell (WBC) count lower than 2.5*10\^9/L, or platelet count greater than 400*10\^9 /L while hemoglobin lower than 100 g/L at any dose of HU; Presence of HU-related toxicities at any dose of HU: e.g. ulcers in legs, or any unacceptable skin mucosal manifestations or fever; Platelet counts > 450*10\^9/L at screening; Neutrophil count ≥1.0*10\^9/L at screening; Haemoglobin ≥11 g/dL at screening for males and 10 g/dL for females at screening; There is no serious function damage in liver and kidney: total bilirubin ≤1.5 upper limit of normal (ULN), alanine aminotransferase≤2.0 ULN, aspartate aminotransferase≤2.0 ULN, prothrombin time is prolonged by less than 4 seconds, Creatinine clearance ≥50 mL/min (according to Cockcroft-Gault formula) at screening; Both male and female subjects must agree take an appropriate contraceptive method, including:; Male subjects: must agree to use reliable contraception from inform consent until 6 months following the last dose of the study drug; Female subjects: Must meet at least one of the following conditions:; Women without childbearing potential; ii) Women of childbearing potential: no pregnant or breastfeed, negative in blood pregnancy test within 4 days prior to the first dosing, and must agree to use reliable contraception from inform consent until 6 months following the last dose of the study drug; Subjects understand the objective, characteristic, method and possible adverse reactions of the study, voluntarily participate in this study, and sign informed consent.

Exclusion: Diagnosed clinically significant depression or a history of depression and, in the investigator's opinion, previous suicide attempts or at any risk of suicide at screening; Have used any investigational drug within 4 weeks prior to first dose of investigational drug, or not recovered from the effects of prior investigational drug administration; History of any other myeloproliferative tumors, or evidence of the presence of any other myeloproliferative tumors; Severe medical conditions or serious comorbidities that the investigators determined could jeopardize the safety or protocol adherence, e.g. New York Heart Association [NYHA] Class III-IV, congestive heart failure, symptomatic arrhythmias，pulmonary hypertension; History of major organ transplantation; Documented autoimmune disease or history of autoimmune disease at screening, e.g. medication un-controlled thyroid dysfunction, autoimmune hepatitis, idiopathic thrombocytopenic purpura, scleroderma, psoriasis, or any autoimmune arthritis; Infection with systemic clinical manifestations at screening, e.g., bacteria, fungi, human immunodeficiency virus, excluding hepatitis B and/or C; Evidence of severe retinopathy, e.g., cytomegalovirus retinitis, symptomatic macular degeneration, or clinically significant eye disease, e.g. due to diabetes mellitus or hypertension; Diagnosed clinically significant neurological disease or a history of clinically significant neurological disease, except for a history of stable cerebral thrombosis or cerebral hemorrhage; History of any malignancy within 5 years (except stage 0 chronic lymphocytic leukemia, basal cell carcinoma, squamous cell carcinoma, and superficial melanoma); A history of alcohol or drug abuse within 1 year; Contraindications or hypersensitivities to interferons of any of its excipients; Clinically significant pulmonary infiltration, infectious pneumonia, and non-infectious pneumonia at screening that, in the investigator's opinion, would jeopardize the safety of the subject or their compliance with the protocol; Other situations that, in the investigator's opinion, not appropriate for inclusion.

ClinicalTrials.gov NCT06552429