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NCT Number: NCT07828223

Cardiac Improvement by Eplerenone Among Patients Under Cyclosporine or Tacrolimus for Kidney Transplantation.

The main objective of this research is to evaluate the effect, for 36 weeks, of eplerenone on abnormalities observed on cardiac ultrasound in patients with kidney transplantation for at least one year, under cyclosporine or tacrolimus. The intervention group will receive the usual standard treatment coupled with eplerenone for 36 weeks from randomization, while the control group will only receive the standard treatment. The main hypothesis is that anticalcineurins (cyclosporin or tacrolimus) lead to activation of the MR of vascular smooth muscle cells, vasoconstriction and vascular inflammation, which contributes to the persistence or recurrence of heart abnormalities in these patients after the initial post-transplant phase. The administration of eplerenone could antagonize this hyperactivation, reduce the cardiovascular effects of anticalcineurins and thus ultimately improve the cardiovascular prognosis of transplant patients.

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

CHU Nantes, Nantes, France

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Male or female with 18 years old or older.
  • Transplant patient for at least one year.
  • Patient on long-term cyclosporine or tacrolimus.
  • Patient whose clinical situation has been stable for at least 3 months, without major treatment modification and without an episode of acute rejection.
  • Patient with renal function with a GFR (glomerular filtration rate) greater than or equal to 40 ml/min/1.73m2.
  • Patient with systolic blood pressure greater than or equal to 110 mmHg, with or without antihypertensive treatment.
  • Patient with the following echocardiographic abnormalities at baseline : an left ventricular mass > to 88 g/m2 in females or > to 102 g/m2 in males and/or left atrial volume > 34 ml/m2.

Exclusion criteria

  • Kidney transplant recipient more than 5 years post-transplantation.
  • Patient with permanent atrial fibrillation.
  • Patient with valvular heart disease (grade ≥ 3).
  • Patient considered to be at very high risk of mortality within the next year.
  • Patient with documented serum potassium ≥ 5.0 mmol/L within the previous month or receiving long-term potassium-binding resin therapy.
  • Patient with documented serum bicarbonate < 20 mmol/L within the previous month, with or without bicarbonate supplementation.
  • Patient receiving treatment with a mineralocorticoid receptor antagonist or having a formal indication for such treatment.
  • Patient receiving another potassium-sparing diuretic.
  • Patient receiving combined treatment with an ACE inhibitor and an angiotensin receptor blocker (each agent being permitted individually).
  • Patient receiving digoxin therapy.
  • Left ventricular ejection fraction (LVEF) < 40% on the baseline echocardiographic assessment.
  • Planned closure of an existing arteriovenous fistula within the following year.
  • Known hypersensitivity or allergy to eplerenone or any of its excipients.
  • Patient with severe hepatic impairment (Child-Pugh class C).
  • Patient currently receiving treatment with a strong CYP3A4 inhibitor (e.g., itraconazole, ketoconazole, ritonavir, nelfinavir, clarithromycin, telithromycin, or nefazodone).
  • Patient with known galactose intolerance, Lapp lactase deficiency, or glucose-galactose malabsorption syndrome.
  • Patient with a contraindication to Kayexalate®: history of hypersensitivity to polystyrene sulfonate resins, obstructive bowel disease, or concomitant treatment with sorbitol-containing laxatives.
  • Woman of childbearing potential not using an effective method of contraception or planning to become pregnant within the next 12 months.
  • Patient participating in another interventional clinical study involving modifications to therapeutic management.

Treatment and study plan

Eplerenone

Drug

The intervention group will receive standard treatment according to usual care, coupled with eplerenone for 36 weeks from randomization. Start of treatment with eplerenone at the initial dose of 25 mg/day, then adjusted according to clinical and biological tolerance: 12.5 mg/day (i.e., 25 mg/48h), 25 mg/day, and 50 mg/day.

Primary outcomes

  1. Hierarchical composite endpoint (win ratio) : 1/ Death or hospitalization for heart failure or acute coronary syndrome, 2/ Variation in indexed left ventricular mass, 3/Variation in indexed left atrial volume.

    Time frame: at 36 weeks

Secondary outcomes

  1. Evolution of Nt-ProBNP concentration

    Time frame: randomization, at 12 and 36 weeks

  2. Evolution of collagen biomarkers (PICP )

    Time frame: at 36 weeks

  3. Evolution of Biological markers of endothelial dysfunction (endothelin)

    Time frame: at 36 weeks

  4. The occurrence of hyperkalaemia

    Time frame: at 36 weeks

    hyperkalaemia between 5 - 5.49; 5.5 - 6; >6mmol/L

  5. Proportion of creatinine increase > 50%

    Time frame: at 36 weeks

    Assessment of the proportion of acute kidney injury (AKI), defined as a >50% increase in serum creatinine from baseline.

  6. Evolution of parameters of systolic function (LVEF, strain)

    Time frame: at 36 weeks

  7. Evolution of parameters of remodeling (left ventricular volume)

    Time frame: at 36 weeks

  8. Evolution of parameters of filling pressures (E/e')

    Time frame: at 36 weeks

  9. Evolution of peripheral systolic blood pressure (mmHg)

    Time frame: at 36 weeks

  10. Evolution of peripheral diastolic blood pressure (mmHg)

    Time frame: at 36 weeks

  11. Evolution of peripheral pulse pressure (mmHg)

    Time frame: at 36 weeks

  12. Evolution of Graft function assessed with serum creatinine (micromol/L)

    Time frame: at 36 weeks

    Graft function assessed with serum creatinine with estimation of glomerular filtration rate according to the CKD-EPI formula.

    The percentage of patients with GFR ≥ 90, 60-89, 45-59, 30-44, 15-29, <15ml/min/1.73m2 will also be assessed.

  13. Evolution of proteinuria (mg/g)

    Time frame: at 36 weeks

    Proteinuria measured by the proteinuria/creatininuria ratio. The percentage of patients with proteinuria/creatininuria ratio <500; 500-1000, 1000-2000, 2000-3000, >3000mg/g will also be assessed.

  14. Evolution of parameters of remodeling (left atrial volumes)

    Time frame: at 36 weeks

  15. Evolution of collagen biomarkers ( PIIINP)

    Time frame: at 36 weeks

  16. Evolution of Biological markers of endothelial dysfunction ( soluble endothelium selectin)

    Time frame: at 36 weeks

  17. Evolution of Biological markers of endothelial dysfunction (von Willebrand factor)

    Time frame: at 36 weeks

  18. Evolution of parameters of filling pressures (E-wave deceleration time).

    Time frame: at 36 weeks

  19. Evolution of parameters of filling pressures (Systolic Pulmonary Artery Pressure (PAPs)).

    Time frame: at 36 weeks

Study contacts

Contact information is provided by the study sponsor or research team.

Adrien FLAHAULT, Md PhD

CONTACT

[email protected]

Nesrine BAILI, MD

CONTACT

[email protected]

+33 03 83 85 85 85

Sponsors and collaborators

Lead sponsor

Central Hospital, Nancy, France

Other

Registry information

Official study title

Randomized Controlled Trial Evaluating the Impact of Mineralocorticoid Receptor Blockade by Eplerenone on Echocardiographic Abnormalities Among Kidney Graft Recipient Under Calcineurin Inhibitors. KT-CANOPY: Cardiac Improvement by Eplerenone Among Patients Under Cyclosporine or Tacrolimus for Kidney Transplantation.

Acronym: KT-CANOPY

Important dates

Study start
2027
Primary completion
2030
Study completion
2030
First posted
Sep 18, 2026
Registry last updated
Sep 18, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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