Recruiting

REnin-guided TherApy

Sponsor:

Centre Integre Universitaire de Sante et Services Sociaux du Nord de l'ile de Montreal

Code:

NCT06108427

Conditions

Primary Aldosteronism

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Interventions

Renin measurements

Study Details

Brief summary:

High blood pressure, or hypertension, can be caused by a condition called Primary Aldosteronism (PA), where the body produces too much of a hormone called aldosterone. People with PA have a higher risk of heart problems compared to those with regular high blood pressure. To treat PA, some patients need to take medicine called mineralocorticoid receptor antagonists (MRA) for the rest of their lives. While treatment with MRA is effective, it can have side effects like high levels of potassium in the blood, breast enlargement in men, menstrual problems in women, and reduced sex drive. Finding the right dose of MRA for each patient can be tricky.

Recent observations suggest that when a hormone called renin goes up during MRA treatment, it might be a good sign. This is because renin is higher when the action of aldosterone is well blocked. But it's not certain if this happens because of the patient's unique characteristics or if it can truly be a way to know if the treatment is working.

This study aims to find out if guiding MRA treatment with renin levels leads to more patients having unsuppressed renin levels compared to the standard of care.

This is a multicentric pragmatic clinical trial. Patients with a new diagnosis of PA and low renin levels will be asked if there are willing to participate. Those with recent use of MRA, known MRA intolerance, severe kidney problems, or have high potassium levels will not be able to participate.

Participants will be randomized into two groups: one group will have their MRA treatment adjusted based on renin levels (the "renin-guided" group), and the other group won't have renin levels checked during treatment (the "renin-blinded" group). Both groups will aim to have their blood pressure under control and potassium levels in the normal range.

The main outcome is the proportion in each group with unsuppressed renin levels after 12 months. Other outcomes will be tested, such as changes in renin levels, how well the treatment works, and any safety concerns (like potassium levels, kidney function, side effects, and blood pressure changes). Different groups of patients will also be looked at separately, like men and women, different ages, races, and initial renin levels, to see if the approach works better for some people.

This study will help find a safe and effective way to treat PA with MRA. Choosing the right dose of MRA is important to adequately block aldosterone but also to avoid side effects.

Conditions

Primary Aldosteronism

Study ID

NCT06108427

Start date

Apr 25, 2024

Status verified date

Mar, 2026

Completion date

Sep, 2027

Anticipated

Primary completion date

Sep, 2027

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Inclusion Criteria:

  • Over 18 years of age
  • Diagnosis of PA, in accordance with clinical guidelines and local practice
  • Suppressed plasma renin prior to treatment initiation (plasma renin concentration >15 mIU/L or >10 ng/L, or plasma renin activity >1 ng/mL/h)
  • Planned long-term treatment with mineralocorticoid receptor antagonist

Exclusion Criteria:

  • Prior use of mineralocorticoid receptor antagonist or any potassium-sparing diuretics in the past 3 months
  • Known intolerance or contraindication to mineralocorticoid receptor antagonist treatment
  • eGFR < 30 ml/min/1.73m2 (past 3 months)
  • Baseline serum potassium above > 4.8 mmol/L (past 3 months)
  • Deemed medically unsafe to stop medications for the initiation of MRA as monotherapy
  • Pregnancy or breastfeeding
  • Participation in another study that is likely to affect renin or BP levels
  • Inability to provide consent due to cognitive impairment and/or language barrier.

Study Design

Enrollment

58 participants

Anticipated

Allocation

Randomized

Intervention Model

Parallel Assignment

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: Renin-guided arm

Renin levels will be measured prior to each follow-up appointment and MRA therapy will be titrated to achieve renin unsuppression and normokalemia. Once this is achieved, any other class of antihypertensive drugs mais be used to achieve normal BP levels.

no intervention: Renin-blinded arm

No measurements of renin levels will be allowed during follow-up. MRA therapy will be titrated to achieve normokalemia. Once this is achieved, any other class of antihypertensive drugs mais be used to achieve normal BP levels.

Interventions

Renin measurements

Use of plasma renin measurements to guide MRA dosing, aiming for plasma renin unsuppression

Primary outcome measure

  • Proportion of participants with unsuppressed renin [ Time Frame: 12 months ]

Central Contacts and Locations

Central contacts

Remi Goupil, MD MSc

1(514)338-2883remi.goupil@umontreal.ca

Locations

Hôpital du Sacré-Coeur de Montréal

Recruiting

Montreal, Quebec, Canada, H4J1C5

Principal Investigator:

Remi Goupil, MD MSc

More Information

Sponsor

Centre Integre Universitaire de Sante et Services Sociaux du Nord de l'ile de Montreal

Last update posted

Mar 17, 2026

Last verified

Mar, 2026

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by Centre Integre Universitaire de Sante et Services Sociaux du Nord de l'ile de Montreal on 2026-03-17.