Extension Study of P1101 After Completion of Phase 2 Study in PV Patients or Phase 3 Study in ET Patients

Study Purpose

This is a Phase 3 open-label, multicenter, single arm study designed to evaluate the efficacy and safety and tolerability of P1101 patient with PV or ET in long-term.

Recruitment Criteria

Accepts Healthy Volunteers Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms	No
Study Type An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes. An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes. Searching Both is inclusive of interventional and observational studies.	Interventional
Eligible Ages	20 Years and Over
Gender	All

More Inclusion & Exclusion Criteria

Inclusion Criteria:

- Patients who have completed the 52-week treatment duration in Study A19-201 and are considered by the investigator or sub investigator to be eligible for participation in this study.

- Patients who have given written informed consent to participate in this study.

Exclusion Criteria:

- Patients who are considered by the investigator or sub investigator to be ineligible for continued treatment with P1101

Trial Details

Trial ID: This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.	NCT04655092
Phase Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans. Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data. Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs. Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.	Phase 3
Lead Sponsor The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.	PharmaEssentia Japan K.K.
Principal Investigator The person who is responsible for the scientific and technical direction of the entire clinical study.	Keita Kirito, MD
Principal Investigator Affiliation	University of Yamanashi Hospital
Agency Class Category of organization(s) involved as sponsor (and collaborator) supporting the trial.	Industry
Overall Status	Recruiting
Countries	Japan
Conditions The disease, disorder, syndrome, illness, or injury that is being studied.	Polycythemia Vera (PV)

Additional Details

The study is to evaluate the long-term safety and efficacy of P1101 in PV or ET patients who participated in Study A19-201 or Study P1101 ET. The subjects who have completed the 52-week P1101 treatment duration in Study A19-201 will start treatment with P1101 at the dose at Week 50. The subjects who have completed the follow-up/end-of-study visit in Study P1101 ET will start treatment with P1101 at the dose at Week 50. The subjects who were treated with anagrelide will start treatment with P1101 at a dose of 250 μg. The dose of P1101 during this study may be increased or decreased up to 500 μg depending on the condition. Evaluation of safety will include assessing vital signs, clinical safety laboratory tests, physical examinations, ECG evaluation, heart ECHO, lung X-ray, ECOG performance status, ocular examination, and AEs. Efficacy evaluations, safety assessments, and immunogenicity evaluations of P1101 will be performed. Evaluation of efficacy will include clinical laboratory assessments, allelic burden measurements of CALR, JAK-2, and MPL, spleen size measurements, bone marrow sampling.

Arms & Interventions

Arms

Experimental: P1101 (Ropeginterferon alfa-2b)

Conventional treatment based on phlebotomies, lowdose aspirin (acetylsalicylic acid, 75-150 mg/day) plus the subcutaneous administration of pegylated prolineinterferon alpha-2b (P1101, Ropeginterferon alfa-2b) once every 2 weeks.

Interventions

Biological: - P1101 (Ropeginterferon alfa-2b)

The subjects who have completed the 52-week treatment duration in Study A19-201 will be treated with P1101, starting at the dose at Week 50. The dose during this study may be increased or decreased up to 500 μg depending on the condition. This study will be continued as a post-marketing clinical study after acquisition of the marketing approval of P1101.

Contact a Trial Team

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