A Study to Evaluate P1101 in Japanese PV Patients
- Conditions
- Polycythemia Vera (PV)
- Interventions
- Registration Number
- NCT06002490
- Lead Sponsor
- PharmaEssentia Japan K.K.
- Brief Summary
This is a Phase 3 single arm study to investigate efficacy and safety of P1101's rapid titration for adult Japanese patients with PV.
- Detailed Description
Eligible patients will be treated with P1101, starting at 250 μg. A starting dose of P1101 is 250 mcg, an intermediate dose is 350 mcg, and a target dose is 500 mcg. As such, subjects will not be exposed to below optimal doses within the first 4 weeks. The maximum recommended single dose is 500 μg injected every two weeks.
A primary efficacy endpoint is the rate of phlebotomy-free complete hematologic response (CHR) at Week 24, where CHR is defined as the proportion of patients who have achieved a CHR and have not required phlebotomy in the previous 12 weeks. A responder for the primary endpoint is defined as meeting all of the following criteria at Week 24: Hct (\<45%), WBC (≤10 x 10\^9/L), and PLT (≤400 x 10\^9/L).
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 21
- Male or female patients ≥18 years old at the time of informed consent to participate in the study
- Patients diagnosed with PV according to the WHO 2008 or 2016 criteria
- Patients with PV who have the inadequate response to an existing therapy or whom the existing therapy is inappropriate to apply (see Appendix 6)
- Patients with adequate hepatic function at screening defined as total bilirubin ≤1.5 x upper limit of normal (ULN), international normalized ratio (INR) of prothrombin time (PT) ≤1.5 x ULN, albumin >3.5 g/dL, alanine aminotransferase (ALT) ≤2.0 x ULN, and aspartate aminotransferase (AST) ≤2.0 x ULN.
- Patients with hemoglobin (HGB) ≥10 g/dL in female and ≥11 g/dL in male at screening
- Patients with a neutrophil count ≥1.5 x 10^9/L at screening
- Patients with serum creatinine ≤1.5 x ULN at screening
- Males, and females of childbearing potential, as well as all women <2 years after the onset of menopause, must agree to use an acceptable form of birth control until 14 days following the last dose of the study drug. Also, women must agree not to breastfeed during the study (see Appendix 4 for details)
- Written informed consent has been obtained from the patient or the patient's legally authorized representative, and the patient is capable of complying with the study requirements.
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Patients with contraindications to or hypersensitivity to IFN-α
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Patients with previous use of IFN-α, or previous treatment with ruxolitinib
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Patients with comorbidity with severe or serious condition that, in the opinion of the Investigator, may impact the patient's participation in the study
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Patients with a history of major organ transplantation
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Pregnant or lactating females
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Patients with any other medical condition that, in the opinion of the Investigator, might impair the outcome of the study or compliance with the requirements of the protocol. These diseases include, but are not limited to, the following:
6.1 Patients with a history or presence of autoimmune thyroid dysfunction (clinical symptoms of hyper- or hypo-thyroidism), except late stages cases on the oral thyroid substitution therapy, where potential exacerbation under interferon therapy will not constitute any further harm to the patient 6.2 Patients with any documented history of autoimmune disease (for example, hepatitis, idiopathic thrombocytopenic purpura [ITP], scleroderma, psoriasis, or autoimmune arthritis) 6.3 Patients with clinically relevant pulmonary infiltrates, infectious pneumonia or noninfectious pneumonia at screening, or a history of interstitial pulmonary disease.
6.4 Patients with active infection with systemic symptoms (for example, bacterial, fungal, hepatitis B virus (HBV), hepatitis C virus (HCV), or human immunodeficiency virus (HIV) infection at screening).
6.5 Patients with any evidence of severe retinal disease (e.g., cytomegalovirus [CMV] retinitis, macular degeneration) or clinically relevant ophthalmologic disease (due to diabetes mellitus or hypertension) based on the ophthalmological assessment by specialists.
6.6 Patients with uncontrolled depression in the opinion of the Investigator 6.7 Patients with a history of suicide attempts or at risk for suicide at screening 6.8 Patients with uncontrolled diabetes mellitus (baseline HbA1c >7%) 6.9 Patients with active thromboembolism or active abdominal bleeding due to PV 6.10 Patients with a history of malignancy within the last 5 years [excluding adequately treated non-melanoma skin cancers, post-prostatectomy prostate-specific antigen (PSA) failure, healed cervical intraepithelial neoplasia and ductal carcinoma in situ (DCIS), stage 1 endometrial carcinoma, or solid tumors (without myelopathy), including other lymphomas that have not had evidence of disease for at least 2 years after treatment].
6.11 Patients with a history of alcohol or drug abuse within the recent one year 6.12 Patients with a history or evidence of post-polycythemia vera myelofibrosis (post-PV MF), essential thrombocythemia, or MPN other than PV
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Patients who received any other study treatment or concomitant medication with other study drug within 4 weeks prior to the first dose of study drug in this study or not recovered from any prior exposure to any other study drug.
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Patients with symptomatic splenomegaly
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Patients with circulating blasts in the peripheral blood within the last 12 weeks
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description P1101 Phlebotomy Conventional treatment based on phlebotomies, low-dose aspirin (acetylsalicylic acid, 75-150 mg/day) plus the subcutaneous administration of pegylated proline-interferon alpha-2b (P1101, ropeginterferon alfa-2b) once every 2 weeks. P1101 Low-dose aspirin Conventional treatment based on phlebotomies, low-dose aspirin (acetylsalicylic acid, 75-150 mg/day) plus the subcutaneous administration of pegylated proline-interferon alpha-2b (P1101, ropeginterferon alfa-2b) once every 2 weeks. P1101 P1101 Conventional treatment based on phlebotomies, low-dose aspirin (acetylsalicylic acid, 75-150 mg/day) plus the subcutaneous administration of pegylated proline-interferon alpha-2b (P1101, ropeginterferon alfa-2b) once every 2 weeks.
- Primary Outcome Measures
Name Time Method Proportion of Subjects Who Achieved Durable Phlebotomy-free Complete Hematological Response (CHR) at Week 24 24 weeks
- Secondary Outcome Measures
Name Time Method Rate of achieving "phlebotomy-free complete hematologic response (CHR)" (the same criteria as for the primary efficacy endpoint) at both Week 12 and Week 24. Week12, Week24 Time to achieve CHR Up to Week24 Time to reach response maintenance dose (three consecutive doses of the same dose) Up to Week24 Numbers of phlebotomy required and changes in numbers of phlebotomy required from baseline Baseline, up to Week24 Time to first response in peripheral blood count (Hct, WBC, and PLT) Up to Week24 Duration of response in peripheral blood count (Hct, WBC, and PLT) Up to Week24 Improvement of symptoms assessed by MPN-SAF TSS at each visit Up to Week24 Rated on a scale of 0-10 on an 11-point scale, with 0 being no symptoms, 1 being the best, and 10 being the worst.
Proportion of subjects without thrombotic or hemorrhagic events at Weeks 12 and 24 Week12, week24 Change from baseline to Week 24 in JAK2 V617F allele burden level Baseline, week24 Collect and measure Pharmacokinetics (PK) at trough Day1, Week2, Week4, Week6, Week8, Week10, Week12, Week14, Week16, Week18, Week20, Week22, Week24
Trial Locations
- Locations (6)
Mie University Hospital
🇯🇵Mie, Japan
Osaka University Hospital
🇯🇵Osaka, Japan
Kansai Medical University Hospital
🇯🇵Osaka, Japan
Juntendo University Hospital
🇯🇵Tokyo, Japan
Tokyo Medical University Hospital
🇯🇵Tokyo, Japan
University of Yamanashi Hospital
🇯🇵Yamanashi, Japan