A Study Evaluating the Efficacy, Safety, Pharmacokinetics and Pharmacodynamics of Crovalimab in Participants With Paroxysmal Nocturnal Hemoglobinuria (PNH) Not Previously Treated With Complement Inhibition

Phase 3

Active, not recruiting

Conditions: Paroxysmal Nocturnal Hemoglobinuria

Interventions: Drug: Crovalimab

Registration Number: NCT04654468

Lead Sponsor: Hoffmann-La Roche

Brief Summary: This study will enrol participants aged 12 years or older with a body weight \>= 40 kilograms (kg) diagnosed with PNH who have not been previously treated with complement inhibitor therapy. Approximately 50 participants will be treated with Crovalimab for at least 24 weeks.

Detailed Description: Not available

Recruitment & Eligibility

Status: ACTIVE_NOT_RECRUITING

Sex: All

Target Recruitment: 51

Inclusion Criteria

Body weight >= 40 kg at screening.
Willingness and ability to comply with all study visits and procedures.
Documented diagnosis of PNH, confirmed by high sensitivity flow cytometry.
LDH Levels >= 2x the ULN at screening.
Participants who have at least four transfusions during 12 months prior to screening (documented in the medical record).
Presence of one or more of the following PNH-related signs or symptoms within 3 months of screening.
Vaccination against Neisseria meningitidis serotypes A, C, W, and Y < 3 years prior to initiation of study treatment (Day 1)
Vaccination against Haemophilius influenzae type B and Streptococcus pneumonia according to national vaccination recommendations.
For participants receiving other therapies (e.g., immunosuppressants, corticosteroids): stable dose for >= 28 days prior to screening and up to the first drug administration.
Adequate hepatic and renal function.
Women of childbearing potential: agreement to remain abstinent (refrain from heterosexual intercourse) or use contraception during the treatment period and for 46 weeks (approximately 10.5 months) after the final dose of crovalimab.
Platelet count >=30,000 cubic millimeter (mm^3) at screening
ANC > 500/μl at screening

Exclusion Criteria

Current or previous treatment with a complement inhibitor.
History of allogeneic bone marrow transplantation.
History of Neisseria meningitidis infection within 6 months prior to screening and up to first drug administration.
Known or suspected immune or hereditary complement deficiency.
Known HIV infection with CD4 count < 200 cells per microlitre (cells/µl) within 24 weeks prior to screening.
Infection requiring hospitalization or treatment with intravenous (IV) antibiotics within 28 days prior to screening and up to the first drug administration, or oral antibiotics within 14 days prior to screening and up to the first drug administration.
Active systemic bacterial, viral, or fungal infection within 14 days before first drug administration.
Presence of fever (>= 38˚C) within 7 days before the first drug administration.
Splenectomy < 6 months before screening.
History of malignancy within 5 years prior to screening and up to the first drug administration.
Pregnant or intending to become pregnant during the study or within 46 weeks (10.5 months) after the final dose of study treatment.
Participation in another interventional treatment study with an investigational agent or use of any experimental therapy within 28 days of screening or within 5 half-lives of that investigational product, whichever is greater.

Study & Design

Study Type: INTERVENTIONAL

Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Crovalimab	Crovalimab	Participants will receive a loading series of crovalimab comprised of an intravenous (IV) dose on Day 1, followed by weekly crovalimab subcutaneous (SC) doses for 4 weeks on Week 1 Day 2, then on Weeks 2, 3, and 4. Maintenance SC dosing will begin at Week 5 and will continue Q4W (every 4 weeks) thereafter for a total of 24 weeks of study treatment. After 24 weeks of crovalimab treatment, participants who derive benefit from the drug may continue to receive crovalimab.

Primary Outcome Measures

Name	Time	Method
Mean Percentage of Participants With Hemolysis Control	From Week 5 up to Week 25	A Generalized Estimating Equation (GEE) was used to estimate the population-average percentage of the participants with hemolysis control (measured by lactate dehydrogenase (LDH) ≤1.5 x upper limit of normal (ULN)) from Week 5 to Week 25 taking account of the intra-patient and inter-patient correlation between LDH control statuses across visits. The dependent variable was the binary indicator for hemolysis control. Independent variables are categorical effects of visits, continuous baseline LDH.
Difference in Percentage of Participants With Transfusion Avoidance (TA) From Baseline Through Week 25 and Within 24 Weeks Prior to Screening	24 Weeks Prior to Screening, Baseline to Week 25	TA was defined as participants who were packed red blood cell (pRBC) transfusion-free and did not require transfusion per protocol-specified guidelines. TA within 24 weeks prior to screening was based on the pRBC transfusion history in the medical records. Reported in this outcome measure is the difference in the percentage of participants between "baseline through Week 25" and "within 24 weeks prior to screening". 95% Confidence Interval (CI) for the difference between the percentage of participants with transfusion avoidance between Pre-screening and Post-baseline is calculated using the Newcombe method. Screening= Day -28 to Day -1 and Baseline= Day 1.

Secondary Outcome Measures

Name	Time	Method
Percentage of Participants With Stabilized Hemoglobin	Baseline, Week 25	Stabilized hemoglobin was defined as avoidance of a ≥2 g/dL decrease in hemoglobin level from baseline, in the absence of transfusion. As pre-specified in the SAP participants withdrawing before Week 25 were deemed to not have hemoglobin stabilization.
Change From Baseline in Fatigue in Adults Aged >=18 Years	Baseline, Week 2, Week 5, Week 9, Week 17, Week 25	Fatigue was assessed using functional assessment of chronic illness therapy-fatigue (FACIT-F) scale. FACIT-F is a self-assessment questionnaire with a 7-day recall period and 13 items evaluating fatigue and its impact on daily life activities. Items are scored on a response scale that ranges from 0 ("not at all") to 4 ("very much so"). Relevant items are reverse scored, and all the items are summed to create a total score range from 0 to 52, with 0 being the worst possible score and 52 being the best possible score. A higher score indicates low fatigue severity. A positive mean change indicates improvement. FACIT-F was assessed in adult participants only. FACIT-F assessment was unintentionally missed in the Schedule of Activities (SoA) table, which site used to guide the assessments at each timepoint. Therefore, data were not collected at Week 25.
Percentage of Participants With Breakthrough Hemolysis (BTH)	Baseline, Week 25	BTH was defined as at least one new or worsening symptom or sign of intravascular hemolysis (fatigue, hemoglobinuria, abdominal pain, shortness of breath \[dyspnea\], anemia \[hemoglobin \< 10 grams per deciliter (g/dL)\], major adverse vascular event \[MAVE, including thrombosis\], dysphagia, or erectile dysfunction) in the presence of elevated LDH ≥2xULN after a prior LDH reduction to ≤1.5xULN from the start of study treatment. As pre-specified in the SAP participants withdrawing before Week 25 were deemed to have experienced a BTH event. Percentages have been rounded off to the first decimal point.
Percentage of Participants With Adverse Events (AEs)	Up to 7 years
Percentage of Participants With Injection-Site Reactions, Infusion-Related Reactions, Hypersensitivity, and Infections (Including Meningococcal Meningitis)	Up to 7 years
Percentage of Participants With Adverse Events (AEs) Leading to Study Drug Discontinuation	Up to 7 years
Observed Value in Absolute Reticulocyte Count	Up to 7 years
Observed Value in Free Hemoglobin	Up to 7 years
Trough Serum Concentration of Crovalimab Over Time	Up to 7 years
Serum Concentrations of Crovalimab	Up to 7 years
Percentage of Participants With Anti-Drug Antibodies (ADAs) to Crovalimab	Up to 7 years
Terminal Complement Activity as Measured by Liposome Immunoassay (LIA)	Up to 7 years
Change Over Time in Total and Free C5 Concentration	Up to 7 years
Observed Value in Haptoglobin	Up to 7 years
Percent Change From Baseline in Absolute Reticulocyte Count	Baseline, Week 25
Percent Change From Baseline in Free Hemoglobin	Baseline, Week 25
Percent Change From Baseline in Haptoglobin	Baseline, Week 25

Trial Locations

Locations (4): West China Hospital, Sichuan University
🇨🇳
Chengdu City, China
Institute of Hematology and Hospital of Blood Disease
🇨🇳
Tianjin City, China
Union Hospital Tongji Medical College Huazhong University of Science and Technology
🇨🇳
Wuhan City, China
Tianjin Medical University General Hospital
🇨🇳
Tianjin, China