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Circulating NEP and NEP Inhibition Study in Heart Failure With Preserved Ejection Fraction

A Proof of Concept Study to Determine the Efficacy of Entresto™ in HFpEF Based on Circulating Neprilysin Levels: The Circulating NEP and NEP Inhibition (CNEPi) Study

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03506412
Acronym
CNEPi
Enrollment
40
Registered
2018-04-24
Start date
2018-06-25
Completion date
2021-03-23
Last updated
2022-02-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Heart Failure With Preserved Ejection Fraction

Keywords

Heart Failure, HFpEF, Entresto™, Neprilysin, Diastolic Heart Failure

Brief summary

To determine biomarker responses to Entresto™in patients with Heart Failure with preserved Ejection Fraction (HFpEF) and who have high or low serum neprilysin (NEP) levels.

Detailed description

This is a proof of concept single arm study in which 40 subjects with HFpEF will be assigned to Entresto™ 49/51 mg (sacubitril/valsartan) twice-daily for a total duration of up to 5 weeks of treatment. Blood will be drawn prior to and at completion of treatment. The primary endpoint measured is change in biomarkers with Entresto™ administration that reflect NEP activity and myocardial stress (NT pro-ANP, -BNP, -CNP) and drug action (cGMP). This endpoint has been well validated as a measure of Entresto™ drug response.

Interventions

DRUGEntresto™ 49Mg-51 mg tablet

Entresto™ 49Mg-51 mg will be given twice daily orally for 5 weeks

Sponsors

National Institute on Aging (NIA)
CollaboratorNIH
Mayo Clinic
Lead SponsorOTHER

Study design

Allocation
NON_RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Entresto™ will be administered to subjects with high and low circulating neprilysin (NEP) levels.

Eligibility

Sex/Gender
ALL
Age
50 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. Age ≥ 50 years 2. LVEF ≥ 45% assessed by echocardiography, nuclear scan, MRI or left ventriculogram within the past 24 months 3. Current New York Heart Association (NYHA) class 2-4 symptoms of heart failure (HF) 4. Stable medical therapy for 30 days as defined by: 1. No addition or removal of ACE, ARB, beta-blockers, calcium channel blockers (CCBs) or aldosterone antagonists 2. No change in dosage of ACE, ARBs, beta-blockers, CCBs or aldosterone antagonists of more than 100% 5. One of the following within the last 24 months 1. Previous hospitalization for HF with radiographic evidence of pulmonary congestion (pulmonary venous hypertension, vascular congestion, interstitial edema, pleural effusion) or 2. Catheterization documented elevated filling pressures at rest (LVEDP≥15 or PCWP≥20) or with exercise (PCWP≥25) or 3. Elevated NT-proBNP (\> 400 pg/ml) or BNP (\> 200 pg/ml) or 4. Echo evidence of diastolic dysfunction / elevated filling pressures (at least two) i. E/A \> 1.5 + decrease in E/A of \> 0.5 with valsalva ii. Deceleration time ≤ 140 ms iii. Pulmonary vein velocity in systole \< diastole (PVs\<PVd) (sinus rhythm) iv. E/e'≥15 v. Left atrial enlargement (≥ moderate) vi. Pulmonary artery systolic pressure \> 40 mmHg vii. Evidence of left ventricular hypertrophy 1. LV mass/BSA ≥ 96 (♀) or ≥ 116 (♂) g/m2 2. Relative wall thickness ≥ 0.43 (♂ or ♀) \[(IVS+PW)/LVEDD\] 3. Posterior wall thickness ≥ 0.9 (♀) or 1.0 (♂) cm

Exclusion criteria

1. History of hypersensitivity or allergy to ACE inhibitors (ACEIs), ARBs, or NEP inhibitors 2. Known history of angioedema 3. Previous LVEF \< 40% at any time 4. Systolic blood pressure \< 100 mmHg or \> 180 mmHg 5. Current acute decompensated HF (exacerbation of chronic HF manifested by signs and symptoms that may require intravenous therapy) 6. Unstable angina, myocardial infarction, stroke, transient ischemic attack, or cardiovascular surgery or urgent percutaneous coronary intervention (PCI) within 3 months of screening or elective PCI within 30 days of entry 7. Significant valvular stenosis or regurgitation (greater than moderate in severity), hypertrophic, restrictive or obstructive cardiomyopathy including amyloidosis, constrictive pericarditis, primary pulmonary hypertension, or biopsy proven active myocarditis 8. Severe congenital heart disease 9. History of heart transplant or with LV assist device 10. Evidence of severe hepatic disease as determined by any one of the following: history of hepatic encephalopathy, history of esophageal varices, or history of porto-caval shunt. 11. Glomerular filtration rate \< 20 ml/min/1.73 m2 on most recent clinical laboratories\* 12. Serum potassium of \> 5.5 mEq/dL on most recent clinical laboratories\* 13. Concomitant use of aliskiren in patients with diabetes 14. Currently receiving an investigational drug 15. Inability to comply with planned study procedures 16. Female subject who is pregnant or breastfeeding * Performed within 90 days of enrollment

Design outcomes

Primary

MeasureTime frameDescription
Change in Plasma N-terminal Proatrial Natriuretic Peptide (NT proANP)baseline, 5 weeksChange in plasma NT pro-ANP value levels as measured in pg/mL. NT-pro ANP means N-terminal polypeptide of ANP (atrial natriuretic peptide) precursor. Natriuretic peptides are substances made by the heart. Elevated levels can mean the heart isn't pumping as much blood the body needs.
Change in Plasma N-terminal Pro B-type Natriuretic Peptide (NT-proBNP)baseline, 5 weeksChange in plasma NT pro-ANP value levels as measured in pg/mL. Natriuretic peptides are substances made by the heart. Two main types of these substances are brain natriuretic peptide (BNP) and N-terminal pro b-type natriuretic peptide (NT-proBNP). Elevated levels can mean the heart isn't pumping as much blood the body needs.
Change in Plasma N-terminal Brain Natriuretic Peptide (BNP)baseline, 5 weeksChange in plasma BNP biomarker value levels as measured in pg/mL. Brain natriuretic peptide is a hormone secreted by cardiomyocytes in the heart ventricles in response to stretching caused by increased ventricular blood volume. Elevated levels can mean the heart isn't pumping as much blood the body needs.
Change in Plasma Cyclic Guanine Monophosphate (cGMP)baseline, 5 weeksChange in Plasma cGMP biomarker value levels as measured in nmol/L. Cyclic guanosine monophosphate is a cyclic nucleotide derived from guanosine triphosphate. cGMP acts as a second messenger to tissue and cellular responses.

Countries

United States

Participant flow

Pre-assignment details

Total of 40 subject enrolled. Enrolled subjects were assigned to an arm based on their Baseline serum Neprilysin (sNEP) levels. Baseline sNEP levels were only available for 37 subjects. Data not collected for 3 subjects.

Participants by arm

ArmCount
Low Serum Neprilysin (sNEP) Levels
Subjects with baseline sNEP levels less than or equal to 0.9 ng/ml Entresto™ 49Mg-51 mg tablet: Entresto™ 49Mg-51 mg will be given twice daily orally for 5 weeks
18
High Serum Neprilysin (sNEP) Levels
Subjects with baseline sNEP greater than or equal to 0.9 ng/ml Entresto™ 49Mg-51 mg tablet: Entresto™ 49Mg-51 mg will be given twice daily orally for 5 weeks
19
Total37

Baseline characteristics

CharacteristicHigh Serum Neprilysin (sNEP) LevelsTotalLow Serum Neprilysin (sNEP) Levels
Age, Continuous74.0 years76 years77.0 years
Race and Ethnicity Not Collected0 Participants
Region of Enrollment
United States
19 participants37 participants18 participants
Sex: Female, Male
Female
7 Participants17 Participants10 Participants
Sex: Female, Male
Male
12 Participants20 Participants8 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 180 / 19
other
Total, other adverse events
0 / 180 / 19
serious
Total, serious adverse events
0 / 180 / 19

Outcome results

Primary

Change in Plasma Cyclic Guanine Monophosphate (cGMP)

Change in Plasma cGMP biomarker value levels as measured in nmol/L. Cyclic guanosine monophosphate is a cyclic nucleotide derived from guanosine triphosphate. cGMP acts as a second messenger to tissue and cellular responses.

Time frame: baseline, 5 weeks

ArmMeasureValue (MEDIAN)
Low Serum Neprilysin (sNEP) LevelsChange in Plasma Cyclic Guanine Monophosphate (cGMP)4.2 nmol/L
High Serum Neprilysin (sNEP) LevelsChange in Plasma Cyclic Guanine Monophosphate (cGMP)1.0 nmol/L
Primary

Change in Plasma N-terminal Brain Natriuretic Peptide (BNP)

Change in plasma BNP biomarker value levels as measured in pg/mL. Brain natriuretic peptide is a hormone secreted by cardiomyocytes in the heart ventricles in response to stretching caused by increased ventricular blood volume. Elevated levels can mean the heart isn't pumping as much blood the body needs.

Time frame: baseline, 5 weeks

ArmMeasureValue (MEDIAN)
Low Serum Neprilysin (sNEP) LevelsChange in Plasma N-terminal Brain Natriuretic Peptide (BNP)-301.5 pg/mL
High Serum Neprilysin (sNEP) LevelsChange in Plasma N-terminal Brain Natriuretic Peptide (BNP)-100.0 pg/mL
Primary

Change in Plasma N-terminal Proatrial Natriuretic Peptide (NT proANP)

Change in plasma NT pro-ANP value levels as measured in pg/mL. NT-pro ANP means N-terminal polypeptide of ANP (atrial natriuretic peptide) precursor. Natriuretic peptides are substances made by the heart. Elevated levels can mean the heart isn't pumping as much blood the body needs.

Time frame: baseline, 5 weeks

ArmMeasureValue (MEDIAN)
Low Serum Neprilysin (sNEP) LevelsChange in Plasma N-terminal Proatrial Natriuretic Peptide (NT proANP)47.4 pg/mL
High Serum Neprilysin (sNEP) LevelsChange in Plasma N-terminal Proatrial Natriuretic Peptide (NT proANP)46.4 pg/mL
Primary

Change in Plasma N-terminal Pro B-type Natriuretic Peptide (NT-proBNP)

Change in plasma NT pro-ANP value levels as measured in pg/mL. Natriuretic peptides are substances made by the heart. Two main types of these substances are brain natriuretic peptide (BNP) and N-terminal pro b-type natriuretic peptide (NT-proBNP). Elevated levels can mean the heart isn't pumping as much blood the body needs.

Time frame: baseline, 5 weeks

ArmMeasureValue (MEDIAN)
Low Serum Neprilysin (sNEP) LevelsChange in Plasma N-terminal Pro B-type Natriuretic Peptide (NT-proBNP)-11.5 pg/mL
High Serum Neprilysin (sNEP) LevelsChange in Plasma N-terminal Pro B-type Natriuretic Peptide (NT-proBNP)45.0 pg/mL

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026