Clinical trial NCT05987449: A Study to Evaluate the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Efficacy of NXT007 in Persons With Severe or Moderate Hemophilia A
Official title: A Phase I/II Study to Evaluate the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Efficacy of NXT007 in Persons With Severe or Moderate Hemophilia A
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: PHASE1
PHASE2
Conditions: Hemophilia A
Lead sponsor: Hoffmann-La Roche
Sponsor class: INDUSTRY
First posted: 2023-08-14
Enrollment: 60
Sex: MALE
Minimum age (years): 2
Maximum age (years): 59
Standard ages: CHILD
ADULT
Accepts healthy volunteers: no
Allocation: NON_RANDOMIZED
Intervention model: SEQUENTIAL
Primary purpose: TREATMENT

Brief summary: WP44714 is a Phase I/II, open-label, non-randomized, global, multicenter trial consisting of two parts:

* Part 1 is a multiple-ascending dose (MAD) study in adult and adolescent male participants with severe or moderate hemophilia A with or without factor VIII (FVIII) inhibitors.
* Part 2 is a multiple-dose study in pediatric male participants with severe or moderate hemophilia A with or without FVIII inhibitors.

The overall aim of the study is to investigate the safety, tolerability, pharmacokinetics, pharmacodynamics, immunogenicity, and efficacy of NXT007.


Eligibility criteria: Inclusion Criteria:

* Diagnosis of severe (Factor VIII \[FVIII\] coagulant activity \<1 IU/dL) or moderate (FVIII coagulant activity ≥1 IU/dL and ≤5 IU/dL) congenital hemophilia A with or without inhibitors against FVIII
* Participants with FVIII inhibitors: participants using recombinant activated factor VII (rFVIIa) or willing to switch to rFVIIa as primary bypassing agent for the treatment of breakthrough bleeds, trauma, or procedures
* Historic local FVIII inhibitor test results being available during screening to confirm any previous inhibitor history and current status
* Participants who previously successfully completed immune tolerance induction (ITI) must have done so at least 5 years before screening and must have no evidence of inhibitor recurrence (permanent or temporary) since. FVIII tolerance defined as \<0.6 Bethesda unit (BU)/mL (\<1.0 BU/mL only for laboratories with an historical sensitivity cutoff for inhibitor detection of 1.0 BU/mL) and in vivo recovery \>66%
* Documentation of number and type of bleeding episodes in the last 24 weeks prior to enrollment
* Adequate hematologic function, defined as platelet count ≥100,000 cells/μL and hemoglobin ≥11 g/dL at the time of screening
* Adequate hepatic function defined as total bilirubin ≤1.5× age-adapted upper limit of normal (ULN) (excluding Gilbert syndrome) and both aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤3× age-adapted ULN at the time of screening, and no clinical signs or known laboratory/radiographic evidence consistent with cirrhosis. For patients with Gilbert syndrome, bilirubin should be \<4 mg/dL or 68.4 umol/L at the time of screening.
* For Part 1 only: Adequate renal function, defined as serum creatinine ≤2.5× age-adapted ULN and calculated creatinine clearance ≥30 mL/min by Cockroft-Gault formula
* For Part 2 only: Adequate renal function, defined as serum creatinine ≤1.5× age-adapted ULN. When the serum creatinine is ≥1.5× ULN, creatinine clearance by Bedside Schwartz formula must be \>70 mL/min/1.73m\^2.
* Willingness and ability to comply with schedules visits, treatment plans, laboratory tests, and other study procedures

Exclusion Criteria:

* Inherited or acquired bleeding disorders other than congenital hemophilia A
* Ongoing or planned ITI therapy
* Previous or current treatment for thromboembolic disease (with the exception of previous catheter-associated thrombosis for which anti-thrombotic treatment is not currently ongoing) or signs of thromboembolic disease
* At high risk for thrombotic microangiopathy (TMA), including past personal or family history of TMA, in the investigator's judgment
* For Part 1 only: Personal history of ischemic heart disease, cerebrovascular disease, or diabetes mellitus
* For Part 1 only: Strong family history of ischemic heart disease or cerebrovascular disease (i.e., first degree relatives such as parents, full siblings, or children): male relatives diagnosed under the age of 55 years and females under the age of 65 years
* For Part 1 only: Previous or concomitant malignancies or leukemia
* Other conditions (e.g., autoimmune conditions such as Systemic Lupus erythematosus and other systemic inflammatory disorders) that may currently increase the risk of bleeding or thrombosis
* History of clinically significant allergies
* Receipt of any of the following:

  i) An investigational drug to treat or reduce the risk of hemophilic bleeds within 5 half-lives of last drug administration or normalization of targeted parameters (e.g., anti-thrombin), whichever is longer; ii) A non-hemophilia-related investigational drug within last 30 days or 5 half-lives, whichever is shorter; iii) Any other investigational drug currently being administered or planned to be administered; iv) Prior gene therapy or gene therapy planned to be administered; v) Use of systemic immunomodulators (e.g., interferon or rituximab) at enrollment or planned use during the study, with the exception of anti-retroviral therapy to treat HIV.
* Protein C activity, protein S free antigen, or anti-thrombin III activity levels below the lower limit of the reference range at screening
* Known HIV infection with CD4 counts \<200 cells/μL
* History of severe allergic or anaphylactic reactions to monoclonal antibody therapy and to chimeric or humanized antibodies or fusion proteins
* Known hypersensitivity to Chinese hamster ovary cell products or to excipient content
* History or presence of an abnormal ECG that is deemed clinically significant, (e.g., complete left bundle branch block, second- or third -degree atrioventricular heart block), including atrial fibrillation or evidence of prior myocardial infarction
* QT interval corrected through use of Fridericia's formula (QTcF) \>450 ms demonstrated by at least two ECGs \>30 minutes apart
* History of ventricular dysrhythmias or risk factors for ventricular dysrhythmias such as structural heart disease (e.g., severe left ventricular systolic dysfunction, left ventricular hypertrophy), coronary heart disease (symptomatic or with ischemia demonstrated by diagnostic testing), clinically significant electrolyte abnormalities (e.g., hypokalemia, hypomagnesemia, hypocalcemia), or family history of sudden unexplained death or long QT syndrome
* Current treatment with medications that are well known to prolong the QT interval

Primary outcomes:
measure: Incidence and Severity of Adverse Events, with Severity Determined According to National Cancer Institute Common Terminology Criteria for Adverse Events Grading Scale
timeFrame: From Baseline until study completion or discontinuation (up to 7.5 years)
measure: Number of Participants with at Least One Clinical Laboratory Test Abnormality for Hematology Parameters
timeFrame: From Baseline until study completion or discontinuation (up to 7.5 years)
measure: Number of Participants with at Least One Clinical Laboratory Test Abnormality for Blood Chemistry Parameters
timeFrame: From Baseline until study completion or discontinuation (up to 7.5 years)
measure: Number of Participants with at Least One Vital Sign Abnormality
timeFrame: From Baseline until study completion or discontinuation (up to 7.5 years)
measure: Number of Participants with at Least One Abnormality on Electrocardiogram (ECG) Recordings
timeFrame: From Baseline until study completion or discontinuation (up to 7.5 years)
Secondary outcomes:
measure: Plasma Concentration of NXT007 at Specified Timepoints
timeFrame: At prespecified timepoints from Week 1 to Week 23, every 28 days from Week 25 until Week 49, and every 12 weeks thereafter until study completion or discontinuation (up to 7.5 years)
measure: Maximum Observed Plasma Concentration (Cmax) of NXT007 After the First Dose
timeFrame: At prespecified timepoints from Day 1 to Day 15
measure: Time to Maximum Observed Plasma Concentration (tmax) of NXT007 After the First Dose
timeFrame: At prespecified timepoints from Day 1 to Day 15
measure: Area Under the Plasma Concentration-Time Curve (AUC) of NXT007 After the First Dose
timeFrame: At prespecified timepoints from Day 1 to Day 15
measure: Number of Participants Testing Positive for Anti-Drug Antibodies Against NXT007 at Baseline and During Treatment with Study Drug
timeFrame: Baseline (predose on Day 1) and from first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Number of Participants Testing Positive for Anti-Factor VIII Inhibitors at Baseline and During Treatment with Study Drug
timeFrame: Baseline (predose on Day 1) and from first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Model-Based Annualized Bleeding Rate for Treated Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Mean Calculated Annualized Bleeding Rate for Treated Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Median Calculated Annualized Bleeding Rate for Treated Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Model-Based Annualized Bleeding Rate for All Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Mean Calculated Annualized Bleeding Rate for All Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Median Calculated Annualized Bleeding Rate for All Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Model-Based Annualized Bleeding Rate for Treated Spontaneous Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Mean Calculated Annualized Bleeding Rate for Treated Spontaneous Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Median Calculated Annualized Bleeding Rate for Treated Spontaneous Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Model-Based Annualized Bleeding Rate for Treated Joint Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Mean Calculated Annualized Bleeding Rate for Treated Joint Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
measure: Median Calculated Annualized Bleeding Rate for Treated Joint Bleeds
timeFrame: From first dose of study drug until study completion or discontinuation (up to 7.5 years)
Other outcomes:
Locations:
city: Sacramento
country: United States
facility: UC Davis Cancer Center
state: California
city: Washington
country: United States
facility: Georgetown Uni Medical Center
state: District of Columbia
city: Indianapolis
country: United States
facility: Indiana Hemophilia & Thrombosis center
state: Indiana
city: Iowa City
country: United States
facility: University of Iowa Hospitals and Clnics Dept of Pediatrics
state: Iowa
city: Vancouver
country: Canada
facility: British Columbia Children's Hospital
state: British Columbia
city: Hamilton
country: Canada
facility: Hamilton Health Sciences Corporation
state: Ontario
city: Rozzano (MI)
country: Italy
facility: Istituto Clinico Humanitas
state: Lombardia
city: Auckland
country: New Zealand
facility: Auckland Cancer Trial Centre
city: Gda?sk
country: Poland
facility: Uniwersyteckie Centrum Kliniczne
city: Warsaw
country: Poland
facility: Instytut Hematologii i Transfuzjologii
city: Madrid
country: Spain
facility: Hospital Universitario la Paz
city: Malaga
country: Spain
facility: Hospital Regional Universitario Carlos Haya
Study officials:
affiliation: Hoffmann-La Roche
name: Clinical Trials
role: STUDY_DIRECTOR
References: