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Study to Assess the Safety, Pharmacokinetics, Pharmacodynamics and Clinical Activity of RXC007 in Idiopathic Pulmonary Fibrosis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT05570058
Recruitment Status : Recruiting
First Posted : October 6, 2022
Last Update Posted : October 18, 2023
Sponsor:
Collaborator:
Simbec Research
Information provided by (Responsible Party):
Redx Pharma Plc

Study Description
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Brief Summary:
The purpose of the study is to assess the safety and tolerability of RXC007 when given for 12 weeks (84 days), alone and in combination with nintedanib or pirfenidone.

Condition or disease Intervention/treatment Phase
IPF Fibrosis Drug: RXC007 Drug: Placebo Phase 2

Detailed Description:

The purpose of this study is to investigate the study drug RXC007.

The main objectives of this study are as follows:

  • To determine the safety and tolerability (degree to which side effects of a drug can be tolerated) of RXC007 when it is administered as twice daily doses over a period of up to 12 weeks (84 days).
  • To investigate the concentration of RXC007 (how much drug is in your blood), how this changes over a period of time and to evaluate whether there are differences in the concentration between different dose strengths of RXC007.
  • To investigate the effect of RXC007 on the body (known as pharmacodynamics) by analysing the levels of certain biomarkers in the body and to assess the effect of RXC007 on markers associated with Idiopathic Pulmonary Fibrosis (IPF). Biomarkers are markers within the body such as a molecule or compound made by cells in the body, which can be measured and used to identify a particular disease.
Study Design
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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 64 participants
Allocation: Randomized
Intervention Model: Sequential Assignment
Masking: Triple (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Multi-Cohort, Randomised, Placebo-Controlled Phase 2a Study to Assess the Safety, Pharmacokinetics, Pharmacodynamics and Clinical Activity of Ascending Doses of RXC007 in Patients With Idiopathic Pulmonary Fibrosis
Actual Study Start Date : September 8, 2022
Estimated Primary Completion Date : April 2024
Estimated Study Completion Date : June 2024

Resource links provided by the National Library of Medicine


Arms and Interventions
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Arm Intervention/treatment
Experimental: Cohort 1
12:4 (RXC007 : Placebo) Dose level 1: 12 weeks (84 days) dosing
 Drug: RXC007
RXC007 will be administered in the form of oral capsules at 3 dose levels: 20 mg, 50mg and 70 mg in 5 cohorts. 12 patients of cohorts 1, 2 and 3 will receive RXC007 and 6 patients of cohorts 1B and 3B. The Dosage regimen is BID or QD.

Drug: Placebo
The placebo will be administered in the form of oral capsules at each dose level to 4 of the 16 participants within cohorts 1, 2 and 3. In Cohorts 1B and 3B, the placebo will be received by 2 of the 8 patients. The Dosage regimen is BID or QD
Experimental: Cohort 2
12:4 (RXC007 : Placebo) Dose level 2: 12 weeks (84 days) dosing
 Drug: RXC007
RXC007 will be administered in the form of oral capsules at 3 dose levels: 20 mg, 50mg and 70 mg in 5 cohorts. 12 patients of cohorts 1, 2 and 3 will receive RXC007 and 6 patients of cohorts 1B and 3B. The Dosage regimen is BID or QD.

Drug: Placebo
The placebo will be administered in the form of oral capsules at each dose level to 4 of the 16 participants within cohorts 1, 2 and 3. In Cohorts 1B and 3B, the placebo will be received by 2 of the 8 patients. The Dosage regimen is BID or QD
Experimental: Cohort 3
12:4 (RXC007 : Placebo) Dose level 3: 12 weeks (84 days) dosing
 Drug: RXC007
RXC007 will be administered in the form of oral capsules at 3 dose levels: 20 mg, 50mg and 70 mg in 5 cohorts. 12 patients of cohorts 1, 2 and 3 will receive RXC007 and 6 patients of cohorts 1B and 3B. The Dosage regimen is BID or QD.

Drug: Placebo
The placebo will be administered in the form of oral capsules at each dose level to 4 of the 16 participants within cohorts 1, 2 and 3. In Cohorts 1B and 3B, the placebo will be received by 2 of the 8 patients. The Dosage regimen is BID or QD
Experimental: Cohort 1B
6:2 (RXC007 : Placebo) Dose level 1; 12 weeks (28 days) dosing, Pre- and on-treatment bronchoscopy
 Drug: RXC007
RXC007 will be administered in the form of oral capsules at 3 dose levels: 20 mg, 50mg and 70 mg in 5 cohorts. 12 patients of cohorts 1, 2 and 3 will receive RXC007 and 6 patients of cohorts 1B and 3B. The Dosage regimen is BID or QD.

Drug: Placebo
The placebo will be administered in the form of oral capsules at each dose level to 4 of the 16 participants within cohorts 1, 2 and 3. In Cohorts 1B and 3B, the placebo will be received by 2 of the 8 patients. The Dosage regimen is BID or QD
Experimental: Cohort 3B
6:2 (RXC007 : Placebo) Dose level 3; 12 weeks (28 days) dosing, Pre- and on-treatment bronchoscopy
 Drug: RXC007
RXC007 will be administered in the form of oral capsules at 3 dose levels: 20 mg, 50mg and 70 mg in 5 cohorts. 12 patients of cohorts 1, 2 and 3 will receive RXC007 and 6 patients of cohorts 1B and 3B. The Dosage regimen is BID or QD.

Drug: Placebo
The placebo will be administered in the form of oral capsules at each dose level to 4 of the 16 participants within cohorts 1, 2 and 3. In Cohorts 1B and 3B, the placebo will be received by 2 of the 8 patients. The Dosage regimen is BID or QD


Outcome Measures
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Primary Outcome Measures :
  1. Incidence and severity of AEs and SAEs Changes in safety laboratory parameters, vital signs, and ECGs [ Time Frame: From Day 1 to post-study follow up visit (12 weeks) ]
    The primary endpoints of the study include the incidence and severity of AEs and SAEs

  2. Number of participants who report a change from normal range values for laboratory safety parameters (serum biochemistry, serum haematology or urinalysis) from first dose on Day 1 to post-study follow up visit. [ Time Frame: From Day 1 to post-study follow up visit (12 weeks) ]
    This primary endpoint will report the number of participants within all cohorts of study who record a value which is deemed as outside of the normal range (regardless of clinical significance) for any of the serum biochemistry, serum haematology or urinalysis parameters as defined in the study protocol following first dose administration on Day 1 up to completion of the post-study visit

  3. Number of participants who report a change from normal range values for vital signs parameters (blood pressure, pulse rate, respiration rate, oral body temperature) from first dose on Day 1 to 12 weeks of treatment [ Time Frame: From Day 1 to post-study follow up visit (12 weeks) ]
    This primary endpoint will report the number of participants within all cohorts of the study who record a value which is deemed as outside of the normal range (regardless of clinical significance) for any of the vital signs parameters (systolic/diastolic blood pressure, pulse rate, respiration rate, oral body temperature) as defined in the study protocol following first dose administration on Day 1 up to completion of the post-study visit

  4. Number of participants who report a change from normal range values for any of the associated 12-Lead ECG parameters (heart rate, QT interval and QTcF interval) from first dose on Day 1 up to completion of the post-study visit. [ Time Frame: From Day 1 to post-study follow up visit (12 weeks) ]
    This primary endpoint will report the number of participants within all cohorts of the study who record a value which is deemed as outside of the normal range (regardless of clinical significance) for any of the 12-Lead ECG parameters (heart rate, QT interval and QTcF interval) as defined in the study protocol following first dose administration on Day 1 up to 12 weeks of treatment


Secondary Outcome Measures :
  1. Pharmacokinetic Parameters - Maximum plasma concentration (Cmax) [ Time Frame: For Cycle1 Day1 pre-dose, 1, 2, 3, 4, 8 h post-dose. For Cycle1 Day8 pre-dose, 1, 2, 3, 4, 8 h post-dose for all BID schedules. If the schedule is changed to QD, for Cycle1 Day8 will include a 24 h post-dose sample (Cycle1 Day9). On Cycle2 Day1 pre-dose. ]
    Plasma samples will be obtained in order to evaluate defined plasma pharmacokinetic parameters for RXC007. This endpoint will report the summary of derived pharmacokinetic parameters for the maximum observed concentration (Cmax) of RXC007 in plasma for all cohorts.

  2. Minimum observed plasma concentration (Cmin) [ Time Frame: For Cycle1 Day1 pre-dose, 1, 2, 3, 4, 8 h post-dose. For Cycle1 Day8 pre-dose, 1, 2, 3, 4, 8 h post-dose for all BID schedules. If the schedule is changed to QD, for Cycle1 Day8 will include a 24 h post-dose sample (Cycle1 Day9). On Cycle2 Day1 pre-dose. ]
    Plasma samples will be obtained in order to evaluate defined plasma pharmacokinetic parameters for RXC007. This endpoint will report the summary of derived pharmacokinetic parameters for the minimum observed concentration (Cmin) of RXC007 in plasma for all cohorts.

  3. Pharmacokinetic Parameters - Time to maximum observed concentration (Tmax) [ Time Frame: For Cycle1 Day1 pre-dose, 1, 2, 3, 4, 8 h post-dose. For Cycle1 Day8 pre-dose, 1, 2, 3, 4, 8 h post-dose for all BID schedules. If the schedule is changed to QD, for Cycle1 Day8 will include a 24 h post-dose sample (Cycle1 Day9). On Cycle2 Day1 pre-dose. ]
    Plasma samples will be obtained in order to evaluate defined plasma pharmacokinetic parameters for RXC007. This endpoint will report the summary of derived pharmacokinetic parameters for the time to maximum observed concentration (Tmax) of RXC007 in plasma for all cohorts.

  4. Pharmacokinetic Parameters - Terminal elimination half-life (t1/2) [ Time Frame: For Cycle1 Day1 pre-dose, 1, 2, 3, 4, 8 h post-dose. For Cycle1 Day8 pre-dose, 1, 2, 3, 4, 8 h post-dose for all BID schedules. If the schedule is changed to QD, for Cycle1 Day8 will include a 24 h post-dose sample (Cycle1 Day9). On Cycle2 Day1 pre-dose. ]
    Plasma samples will be obtained in order to evaluate defined plasma pharmacokinetic parameters for RXC007. This endpoint will report the summary of derived pharmacokinetic parameters for the terminal elimination half-life (t1/2) of RXC007 in plasma for all cohorts

  5. Pharmacokinetic Parameters - Elimination rate constant (λz) [ Time Frame: For Cycle1 Day1 pre-dose, 1, 2, 3, 4, 8 h post-dose. For Cycle1 Day8 pre-dose, 1, 2, 3, 4, 8 h post-dose for all BID schedules. If the schedule is changed to QD, for Cycle1 Day8 will include a 24 h post-dose sample (Cycle1 Day9). On Cycle2 Day1 pre-dose. ]
    Plasma samples will be obtained in order to evaluate defined plasma pharmacokinetic parameters for RXC007. This endpoint will report the summary of derived pharmacokinetic parameters for the elimination rate constant (λz) of RXC007 in plasma for all cohorts.

  6. Pharmacokinetic Parameters - Area under the concentration-time curve (AUC) extrapolated to infinity (AUC0-inf) [ Time Frame: For Cycle1 Day1 pre-dose, 1, 2, 3, 4, 8 h post-dose. For Cycle1 Day8 pre-dose, 1, 2, 3, 4, 8 h post-dose for all BID schedules. If the schedule is changed to QD, for Cycle1 Day8 will include a 24 h post-dose sample (Cycle1 Day9). On Cycle2 Day1 pre-dose. ]
    Plasma samples will be obtained in order to evaluate defined plasma pharmacokinetic parameters for RXC007. This endpoint will report the summary of derived pharmacokinetic parameters for the area under the concentration-time curve (AUC) extrapolated to infinity (AUC0-inf) of RXC007 in plasma for all cohorts.

  7. Pharmacokinetic Parameters - Total apparent clearance following extravascular administration (CL/F) [ Time Frame: For Cycle1 Day1 pre-dose, 1, 2, 3, 4, 8 h post-dose. For Cycle1 Day8 pre-dose, 1, 2, 3, 4, 8 h post-dose for all BID schedules. If the schedule is changed to QD, for Cycle1 Day8 will include a 24 h post-dose sample (Cycle1 Day9). On Cycle2 Day1 pre-dose. ]
    Plasma samples will be obtained in order to evaluate defined plasma pharmacokinetic parameters for RXC007. This endpoint will report the summary of derived pharmacokinetic parameters for the total apparent clearance following extravascular administration (CL/F) of RXC007 in plasma for all cohorts.

  8. Pharmacokinetic Parameters - Apparent volume of distribution following extravascular administration (Vz/F) [ Time Frame: For Cycle1 Day1 pre-dose, 1, 2, 3, 4, 8 h post-dose. For Cycle1 Day8 pre-dose, 1, 2, 3, 4, 8 h post-dose for all BID schedules. If the schedule is changed to QD, for Cycle1 Day8 will include a 24 h post-dose sample (Cycle1 Day9). On Cycle2 Day1 pre-dose. ]
    Plasma samples will be obtained in order to evaluate defined plasma pharmacokinetic parameters for RXC007. This endpoint will report the summary of derived pharmacokinetic parameters for the apparent volume of distribution following extravascular administration (Vz/F) of RXC007 in plasma for all cohorts.

  9. Pharmacokinetic Parameters - Area under the plasma concentration-time curve during a dosing interval at steady state (AUCss) [ Time Frame: For Cycle1 Day1 pre-dose, 1, 2, 3, 4, 8 h post-dose. For Cycle1 Day8 pre-dose, 1, 2, 3, 4, 8 h post-dose for all BID schedules. If the schedule is changed to QD, for Cycle1 Day8 will include a 24 h post-dose sample (Cycle1 Day9). On Cycle2 Day1 pre-dose. ]
    Plasma samples will be obtained in order to evaluate defined plasma pharmacokinetic parameters for RXC007. This endpoint will report the summary of derived pharmacokinetic parameters for the area under the concentration-time curve (AUC) at steady state of RXC007 in plasma for all cohorts.

  10. % predicted and absolute volume change from baseline in Forced Vital Capacity (FVC) at 12 weeks [central review] [ Time Frame: At Screening (Day28 to Day-1), Cycle1 Day1 pre-dose and post-dose, Cycle1 Day8, Cycle1 Day15, Cycle1 Day22, Cycle2 Day1(The day after Cycle1 Day28), Cycle2 Day15, Cycle3 Day1, Cycle3 Day28, End Of Treatment: last day of the dosing Day 21 ]
    Information on Forced Vital Capacity (FVC) for the 6 months prior to study entry will be collected. Spirometry testing (without bronchodilator use) will be performed at all scheduled study visits in clinic. For each patient, spirometry testing should be conducted at approximately the same time of day.

  11. % predicted and absolute change from baseline in carbon monoxide diffusion capacity (DLCO) [ Time Frame: At Screening (day28 to Day-1), Cycle1 Day1 pre-dose, Cycle1 Day15, Cycle2 Day1 (The day after Cycle1 Day28) ]
    Carbon monoxide diffusion capacity will be measured in clinic


Eligibility Criteria
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Ages Eligible for Study:   40 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Aged ≥40 to 80 years at the time of signing the informed consent.
  • Diagnosis of IPF within 5 years of Screening based on the modified ATS/ERS/JRS/ALAT IPF guidelines for diagnosis and management of IPF (Raghu et al, 2018) and confirmed on independent central imaging review.
  • Combination of HRCT pattern, as assessed by central reviewers, consistent with diagnosis of IPF (see the modified ATS/ERS/JRS/ALAT IPF guidelines [Raghu et al, 2018]).
  • FVC % predicted ≥50% predicted of normal at Screening, with no clinically significant deterioration between the Screening Visit and randomisation, as determined by the Investigator.
  • DLco (Hb-adjusted) at screening ≥30%.
  • In the main study, participants receiving treatment for IPF with nintedanib or pirfenidone are allowed if on treatment for at least 3 months and on a stable dose for at least 4 weeks prior to Screening and during Screening.
  • In patients who are not on any treatment for IPF but have previously received nintedanib or pirfenidone, there needs to be a washout period ≥4 weeks prior to Screening.
  • No clinically significant abnormalities, in the opinion of the investigator, in vital signs (e.g., blood pressure, pulse rate, respiration rate, oral temperature) within 28 days before first dose of IMP.

Exclusion Criteria:

  • Currently receiving or planning to initiate treatment for IPF with agents not approved for that indication.
  • FEV1/FVC ratio <0.7 at Screening, pre-bronchodilator use.

  • Lower respiratory tract infection requiring antibiotics within 4 weeks of Screening or during Screening.

    4. The extent of emphysema in the lungs exceeds fibrosis, based on central review of HRCT scans.

  • Need for continuous oxygen supplementation, defined as >15 hours/day.
  • Acute IPF exacerbation within 6 months of Screening or during Screening.
  • Clinical diagnosis of any connective-tissue disease (including, but not limited to, scleroderma, polymyositis/dermatomyositis, systemic lupus erythematosus, and rheumatoid arthritis) or a diagnosis of interstitial pneumonia with autoimmune features as determined by the Investigator applying the recent ERS/ATS research statement [Fischer et al 2015]. Note: Serological testing is not needed if not clinically indicated.
  • Disease other than IPF with a life expectancy of less than 12 weeks.

Additional exclusion criteria for the Translational Science Sub Study

  • Participants with any contra-indication to bronchoscopy and alveolar lavage including tracheal stenosis, pulmonary hypertension, severe hypoxia, or hypercapnia.
  • Patients in the sub study are not permitted to receive nintedanib or pirfenidone within 3 weeks of randomisation and throughout the Treatment period. (Note: background IPF treatment should not be stopped for the purpose of eligibility)
Contacts and Locations
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Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT05570058


Contacts
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Contact: Helen Timmis, MD +44 01625 469900 h.timmis@redxpharma.com
Contact: Emma McMurty, PhD +44 79682 34694 e.mcmurtry@redxpharma.com

Locations
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Sponsors and Collaborators
Redx Pharma Plc
Simbec Research
Investigators
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Principal Investigator: Philip Molyneaux, MD Royal Brompton & Harefield NHS Foundation Trust
Principal Investigator: Toby Maher, MD University of Southern California, USA
More Information
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Responsible Party: Redx Pharma Plc
ClinicalTrials.gov Identifier: NCT05570058    
Other Study ID Numbers: RXC007/0002
First Posted: October 6, 2022    Key Record Dates
Last Update Posted: October 18, 2023
Last Verified: October 2023
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Plan Description: At this stage, it is not planned that any IPD information will be shared with other researchers outside of the Sponsor and Clinical Research Organisation undertaking the conduct of this study.

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Product Manufactured in and Exported from the U.S.: No
Keywords provided by Redx Pharma Plc:
Lung
Respiratory
Fibrosis
IPF
Additional relevant MeSH terms:
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Pulmonary Fibrosis
Idiopathic Pulmonary Fibrosis
Fibrosis
Pathologic Processes
 Lung Diseases, Interstitial
Lung Diseases
Respiratory Tract Diseases