A Phase III Renal Outcomes and Cardiovascular Mortality Study to Investigate the Efficacy and Safety of Baxdrostat in Combination With Dapagliflozin in Participants With Chronic Kidney Disease and High Blood Pressure (BaxDuo-Pacific)

AstraZeneca

Status and phase: Enrolling; Phase 3

Conditions: Chronic Kidney Disease and Hypertension

Treatments: Drug: Baxdrostat/dapagliflozin; Drug: Placebo/dapagliflozin

Study type: Interventional

Funder types: Industry

Identifiers

NCT06742723

D6972C00002

2023-506460-14-00 (Registry Identifier)

Details and patient eligibility

About

International, Multicenter, Double-Blind, Placebo-Controlled and Event-driven study to assess efficacy, safety and Tolerability of Baxdrostat in combination with Dapagliflozin on renal outcomes and cardiovascular mortality in participants with chronic kidney disease and high blood pressure

Full description

The purpose of this study is to investigate the efficacy, safety, and tolerability of baxdrostat in combination with dapagliflozin, compared with placebo and dapagliflozin, in reducing the risk of the composite of > 50% decline in eGFR, kidney failure, or CV death, in individuals with CKD and HTN.

This study consists of a 4-week dapagliflozin Run-in Period for participants untreated with SGLT2i at screening, and a double-blinded period where participants will receive either baxdrostat/dapagliflozin or placebo/dapagliflozin.

Site visits will take place at 2-, 4-, 8-, 16-, 34, and 52-weeks following randomisation. Thereafter visits will occur approximately every 4 months.

The study closure procedures will be initiated when the predetermined number of primary endpoint events is predicted to have occurred ie, the PACD. All randomised participants including any participants who have prematurely discontinued study intervention will be scheduled for a SCV within a few weeks of the PACD. This period can be extended by the Sponsor.

In case of premature discontinuation of blinded study intervention, participants will continue in the study and receive dapagliflozin 10 mg, unless the participant meets dapagliflozin specific discontinuation criteria. If study intervention is temporarily or permanently discontinued, the participant should remain in the study, and it is important that the scheduled study visits (including the PTDV for participants with permanent discontinuation of study intervention) and data collection continue according to the study protocol until the SCV.

Enrollment: 5,000 estimated patients

Sex: All

Ages: 18 to 130 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Participants of any sex and gender must be ≥ 18 years of age at the time of signing the informed consent.

2. Participants with:

   1. eGFR ≥ 30 and < 60 mL/min/1.73 m2 (local or central laboratory values) AND UACR ≥ 30 mg/g (3.39 mg/mmol) and < 500 mg/g (56.5 mg/mmol) (central laboratory values only), or
   2. eGFR ≥ 30 and ≤ 75 mL/min/1.73 m2 (local or central laboratory values) AND UACR ≥ 500 mg/g (56.5 mg/mmol) and ≤ 5000 mg/g (565 mg/mmol) or UPCR ≥ 700 mg/g (79 mg/mmol) and ≤ 7000 mg/g (790 mg/mmol) (local or central laboratory values).

3. [obsolete]

4. Participants with history of HTN and a SBP ≥ 130 mmHg (the most recent value within 4 weeks prior to screening or at the Screening Visit) and ≥ 120 mmHg at the Randomisation Visit.

5. Stable and maximum tolerated dose of an ACEi or an ARB (not both) for at least 4 weeks prior to Screening Visit.

6. Participants with:

   1. Serum or plasma potassium ≥ 3.0 and ≤ 4.8 mmol/L if eGFR ≥ 45 mL/min/1.73 m2 (local or central laboratory values).
   2. Serum or plasma potassium ≥ 3.0 and ≤ 4.5 mmol/L if eGFR < 45 mL/min/1.73 m2 (local or central laboratory values).

Exclusion criteria

1. Systolic blood pressure > 180 mmHg, or diastolic BP > 110 mmHg at screening.

2. Known hyperkalaemia, defined as potassium of ≥ 5.5 mmol/L within 3 months prior to screening.

3. Serum sodium < 135 mmol/L (central or local laboratory values obtained within 4 weeks prior to screening or at the Screening Visit).

4. T1DM:

5. For US only: patients with T1DM treated with SGLT2i for at least 4 months, without DKA during that period, and who have experience with ketone monitoring are eligible for inclusion.

6. For Japan only: patients with T1DM treated with dapagliflozin 10 mg for at least 4 months, without DKA during the period of dapagliflozin treatment are eligible for inclusion.

   5 Uncontrolled T2DM with HbA1c > 10.5% (> 91 mmol/mol) (central or local laboratory values obtained within 3 months prior to screening or at the Screening Visit).

   6 New York Heart Association functional HF class IV at screening.

   7 Stroke, transient ischaemic cerebral attack, valve implantation or valve replacement, carotid surgery, or carotid angioplasty, acute coronary syndrome, or hospitalisation for worsening heart failure within previous 3 months prior to randomisation.

   8 Documented history of adrenal insufficiency.

   9 Any dialysis (including for acute kidney injury) within 3 months prior to Screening Visit.

   10 Any acute kidney injury within 3 months prior to the Screening Visit.

   11 History of organ transplant or bone marrow transplant, or planned organ transplant within 6 months following randomisation (including kidney transplant).

   12 Any clinical condition requiring systemic immunosuppression therapy other than maintenance therapy (stable for at least 3 months prior to Visit 1).

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

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5,000 participants in 2 patient groups, including a placebo group

Baxdrostat/dapagliflozin

Experimental group

Description:

Participants randomised to the baxdrostat/dapagliflozin arm will initially receive a lower dose of baxdrostat and standard dose dapagliflozin. For participants that meet the up-titration criteria, baxdrostat may be up-titrated to higher dose.

Treatment:

Drug: Baxdrostat/dapagliflozin

Placebo/dapagliflozin

Placebo Comparator group

Description:

Patients will receive one dose of dapagliflozin comparator in combination with matching placebo daily.

Treatment:

Drug: Placebo/dapagliflozin