Pegylated Interferon Alfa-2b Versus Interferon Alfa Therapy in Childhood and Adolescent Essential Thrombocythemia

Institute of Hematology & Blood Diseases Hospital, China

Status and phase: Enrolling; Phase 2

Conditions: Essential Thrombocytopenia

Treatments: Drug: Pegylated interferon alfa-2b; Drug: Recombinant Interferon Alpha

Study type: Interventional

Funder types: Other

Identifiers

NCT04226950

IIT2019001

Details and patient eligibility

About

Objectives: To compare the efficacy and safety in childhood and adolescent patients (<20 years) diagnosed as essential thrombocythemia treated with the Pegylated Interferon Alfa-2b vs. Interferon Alfa.

Study Design: A prospective, open-label, nonrandomized, single-center clinical trial

Full description

This is a prospective, open-label, nonrandomized, single-center clinical trial between Interferon Alfa and Pegylated Interferon Alfa-2b in childhood and adolescent essential thrombocythemia (<20 years).

Patients will be divided into the following two treatment groups: 1. Recombinant Interferon Alpha, with an initial dose of 300 wu twice a week. Other interferons that have been listed can be used if Recombinant Interferon Alpha (300 wu) is not available, and the specific dose will be determined by the researchers; 2. Pegylated Interferon Alfa-2b, with an initial dose of 135 ug once a week (body surface area < 1.73 m2) or 180 ug once a week ( body surface area≥1.73 m2).

The current drug therapies and possible risks of Pegylated Interferon Alfa-2b and Interferon Alfa in the treatment of childhood and adolescent essential thrombocythemia will be fully introduced to the guardians (childhood patients) or patients (adolescent patients) by the researchers. Then the patients will be divided into one of the two groups according to the guardians' (childhood patients) or patients' (adolescent patients) will.

The dosage will be adjusted according to the results of laboratory examinations and patient tolerance. The patient will be transferred to the other group if intolerance or resistance occurs.

Enrollment: 40 estimated patients

Sex: All

Ages: Under 19 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• <20 years old
• Male or Female
• Diagnosis of essential thrombocythemia according to the 2016 WHO criteria.
• Platelet count ≥ 450 × 109 / L for more than 6 months（If the patient has JAK2 V617F, CALR or MPL gene mutation, the history may be less than 6 months）
• Platelet count ≥ 1000 × 109 / L or other therapeutic indications at screening.
• The guardians has provided written informed consent prior to enrollment

Exclusion criteria

• Known to meet the criteria for primary myelofibrosis or polycythemia vera by 2016 WHO criteria
• Presence of any life-threatening co-morbidity
• Secondary thrombocytosis
• Familial thrombocytosis
• Resistance, or intolerance, or any contraindications to interferon
• Interferon is used in the past 1 month before enrollment
• Patients with previous or present thrombosis or active bleeding
• WBC<4× 109 / L
• HGB<110g/L
• Poor control of thyroid dysfunction
• Patients with a prior malignancy within the last 3 years
• Patients with severe cardiac or pulmonary dysfunction
• Severe renal damage (creatinine clearance < 30 ml / min)
• Severe liver dysfunction (ALT or AST > 2.5×ULN)
• Patients diagnosed as diabetes with poor control
• Patients with hepatitis B virus, hepatitis C virus replication or HIV infection
• Patients with a history of drug / alcohol abuse (within 2 years before the study)
• Patients that have participated in other experimental researches within one month before enrollment
• History of psychiatric disorder
• Any other circumstances that the investigator considers that the patient is not suitable to participate in the trial

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

---

40 participants in 2 patient groups

Recombinant Interferon Alpha

Active Comparator group

Description:

Recombinant Interferon Alpha, with an initial dose of 300 wu twice a week. Other interferons that have been listed can be used if Recombinant Interferon Alpha (300 wu) is not available, and the specific dose will be determined by the researchers.

Treatment:

Drug: Recombinant Interferon Alpha

Pegylated Interferon Alfa-2b

Experimental group

Description:

Pegylated Interferon Alfa-2b, with an initial dose of 135 ug once a week (body surface area \< 1.73 m2) or 180 ug once a week ( body surface area≥1.73 m2).

Treatment:

Drug: Pegylated interferon alfa-2b