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CompletedNCT01979614Updated Jul 1, 2019Results posted

Study of the Vascular Effects of Serelaxin

A Phase 2 interventional study of Serelaxin and Placebo in Coronary Artery Disease, sponsored by Novartis Pharmaceuticals. Completed at 3 sites in United Kingdom. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2019-07-01.

Sponsored by Novartis Pharmaceuticals · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
58
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

This was a mechanistic study in patients with coronary artery disease on the effects of Serelaxin on micro- and macrovascular function.

Read the detailed description

double blind, randomized, parallel group, placebo controlled study

02

Conditions studied

  • Coronary Artery Disease

Keywords

  • coronary artery disease
03

In context

Coronary Artery Disease

5,598 studies on the registry are indexed under Coronary Artery Disease; 957 are open to participants now.

This study's enrollment of 58 is below the median of 124 across 3,436 interventional studies indexed under Coronary Artery Disease.

Browse Coronary Artery Disease studies →

Lead sponsor

Novartis Pharmaceuticals is the lead sponsor of 2,673 studies on the registry; 228 are open to participants now.

Of its 576 completed or terminated interventional studies of FDA-regulated products, 431 (75%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Male and female patients ≥18 years of age, with body weight \<160 kg.
  • Patients with proven obstructive coronary artery disease, determined either by functional (e.g. treadmill testing) or non-invasive clinical imaging assessments (e.g. stress-echo, PET or SPECT myocardial perfusion), or invasive coronary angiography or by CT coronary angiography at any point in time in patients with or without mild left ventricular systolic dysfunction (LVSD)

Exclusion criteria

Exclusion Criteria:

  • Previous treatment with serelaxin (also known as: RLX030, relaxin)
  • Women of child-bearing potential, defined as all women physiologically capable of becoming pregnant, unless they are using highly effective methods of contraception during dosing of study treatment.
  • Current or planned dialysis.
  • Impaired renal function during screening defined as an estimated glomerular filtration rate (eGFR) at screening and prior to treatment of \<30 mL/min/1.73 m2, calculated using the simplified Modification of Diet in Renal Disease (sMDRD) equation due to potential issue with administration of GdDTPA used as the MRI contrast agent.
  • Sick-Sinus-Syndrome
  • Current or history of pulmonary edema, including suspected sepsis.
  • restrictive, or constrictive cardiomyopathy (does not include restrictive mitral filling patterns seen on Doppler echocardiographic assessments of diastolic function)
  • Known significant valvular disease (including any of the following: severe aortic stenosis [AVA \< 1.0 or peak gradient > 50 on prior or current echocardiogram], severe aortic regurgitation, or severe mitral stenosis).
  • Clinical diagnosis of acute coronary syndrome (ACS) including unstable angina within 30 days prior to screening as determined by both clinical and enzymatic criteria
  • Troponin elevation and dynamics indicative of ACS at any time between screening and randomization.
  • Previous myocardial infarction within 3 months of screening
  • History of Coronary Artery Bypass Graft (CABG) surgery
  • Heart failure due to significant arrhythmias (including any of the following: ventricular tachycardia, bradyarrhythmias with ventricular rate \< 45 beats per minute or any second or third degree AV block or atrial fibrillation/flutter with ventricular response of > 120 beats per minute)
  • Any surgical or medical condition which in the opinion of the investigator may place the patient at higher risk from his/her participation in the study (e.g., history of poor tolerance of adenosine or 3 vessel coronary disease)
  • Acute myocarditis or hypertrophic obstructive, restrictive, or constrictive cardiomyopathy (does not include restrictive mitral filling patterns seen on Doppler echocardiographic assessments of diastolic function).
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
58 participants (actual)

Study arms

  • Experimental
    Serelaxin

    Serelaxin was administered at a dose of 30 μg/kg/24h by intravenous infusion for 48 hours

    Drug: Serelaxin

  • Placebo comparator
    Placebo

    Placebo was administered by intravenous infusion for 48 hours

    Other: Placebo

Interventions

  • DrugSerelaxin

    Serelaxin solution diluted in 5% glucose volume/volume (v/v) solution

    Also known as: RLX030, relaxin

  • OtherPlacebo

    5% v/v glucose solution

06

What researchers measure

Primary outcomes

  1. Statistical Analysis of Change From Baseline to Day 3 in Myocardial Perfusion Endpoints Compared With Mid Perfusion Reserve Index Using ANCOVA End Points

    Global MPRI (Myocardial Perfusion Reserve Index) is defined as ratio between mean global myocardial blood flow values at rest and during adenosine stress with Mid Perfusion Reserve Index or Midl PRI (Mid Perfusion Reserve Index) which is defined as ratio between mid myocardial blood flow values at rest and during adenosine stress

    Time frame: baseline to Day 3

Secondary outcomes

  1. Change From Baseline in Aortic Distensibility Measured by MRI

    Measurements of arterial stiffness from cardiac MRI - Mean (SD) \[n\] Aortic distensibility was assessed by MRI and pulse wave velocity using the SphygmoCor device. (mmHg-1)

    Time frame: At pre-dose on Day 1 (baseline) until Day 180 after the start of drug infusion

  2. Change From Baseline in Aortic Velocity

    Summary table for measurements of arterial velocity from cardiac MRI - Mean (SD) \[n\] Aortic distensibility was assessed by MRI and pulse wave velocity using the SphygmoCor device

    Time frame: At pre-dose on Day 1 (baseline) until Day 180 after the start of drug infusion

  3. Change From Baseline in Augmentation Index Measured From Sphygmocor Device

    Summary of values and change from baseline in augmentation index by time and treatment The change from baseline in Augmentation Index was analyzed using a repeated measures analysis of covariance including treatment, time, treatment by time, baseline by time interactions and baseline as fixed factors with an unstructured variance-covariance matrixStatistical analysis of change from baseline in augmentation index using repeated measures Analysis of Covariance

    Time frame: Day1, Day 2, Day 3, Day 30 and Day 180 after the start of infusion

  4. Statistical Analysis of Change From Baseline in Augmentation Index Using Repeated Measures Analysis of Covariance

    The change from baseline in Augmentation Index was analyzed using a repeated measures analysis of covariance including treatment, time, treatment by time, baseline by time interactions and baseline as fixed factors with an unstructured variance-covariance matrixStatistical analysis of change from baseline in augmentation index using repeated measures Analysis of Covariance For analysis of change from baseline, only subjects with results at both baseline and post-baseline could be included The augmentation index is a ratio calculated from the blood pressure waveform, it is a measure of wave reflection and arterial stiffness. Augmentation index is commonly accepted as a measure of the enhancement (augmentation) of central aortic pressure by a reflected pulse wave

    Time frame: Day1, Day 2, Day 3, Day 30 and Day 180 after the start of infusion

  5. Change From Baseline in Pulse Wave Velocity Measured From Carotid-femoral Pulse Wave Analysis

    Pulse wave velocity was assessed by the SphygmoCor device

    Time frame: Day1, Day 2, Day 3, Day 30 and Day 180 after the start of infusion

  6. Serum Concentration of Serelaxin

    Summary statistics of serelaxin serum PK concentrations Blood samples were taken to measure serelaxin concentration

    Time frame: Day1, Day 2, Day 3 and Day 30 after the start of infusion

  7. Serum Concentration of Antibodies to Serelaxin

    Frequency and percentage of anti-Serelaxin antibodies Blood samples were taken to measure antibodies to serelaxin concentration at Pre-dose on Day 1, and at Day 30 after the start of the 48h drug infusion

    Time frame: From pre-dose on Day 1 until Day 30 after the start of drug infusion

  8. Systemic Clearance of Serelaxin

    Systemic clearance was estimated using the rate of serelaxin infusion and the steady state concentration

    Time frame: From pre-dose on Day 1 until 48h after the start of drug infusion

07

Results

Posted Jul 1, 2019

Participant flow

Out of the total 63 participants screened, 62 were randomized. 4 of the randomized participants did not receive study drug, and 58 did receive study drug

Participant flow — Overall Study
MilestoneSerelaxinPlacebo
Started3028
Safety analysis set3028
Pk analysis set300
Pd analysis set2526
Completed2927
Not completed11
Withdrew: Adverse event11

Outcome measures

PrimaryStatistical Analysis of Change From Baseline to Day 3 in Myocardial Perfusion Endpoints Compared With Mid Perfusion Reserve Index Using ANCOVA End Points

Global MPRI (Myocardial Perfusion Reserve Index) is defined as ratio between mean global myocardial blood flow values at rest and during adenosine stress with Mid Perfusion Reserve Index or Midl PRI (Mid Perfusion Reserve Index) which is defined as ratio between mid myocardial blood flow values at rest and during adenosine stress

Time frame:
baseline to Day 3
Reported as:
Mean · ratio
Statistical Analysis of Change From Baseline to Day 3 in Myocardial Perfusion Endpoints Compared With Mid Perfusion Reserve Index Using ANCOVA End Points
ratioSerelaxinPlacebo
Global Myocardial Perfusion Reserve Index (MPRI)-0.244 (-0.454 to -0.035)-0.133 (-0.329 to -0.064)
Mid Perfusion Reserve Index-0.264 (-0.519 to -0.010)-0.075 (-0.313 to 0.164)
Statistical analysis
  • Serelaxin vs Placebo · ANCOVA · p = 0.438 · Standard error: -0.1116 · 95% CI -0.399 to 0.176
SecondaryChange From Baseline in Aortic Distensibility Measured by MRI

Measurements of arterial stiffness from cardiac MRI - Mean (SD) \[n\] Aortic distensibility was assessed by MRI and pulse wave velocity using the SphygmoCor device. (mmHg-1)

Time frame:
At pre-dose on Day 1 (baseline) until Day 180 after the start of drug infusion
Reported as:
Mean · mmHg-1
Change From Baseline in Aortic Distensibility Measured by MRI
mmHg-1SerelaxinPlacebo
Ascending Aorta Distensibility, Day 00.0017 ± 0.001580.0014 ± 0.00192
Ascending Aorta Distensibility, Day 470.0015 ± 0.001240.0015 ± 0.00134
Descending Aorta Distensibility, Day 00.0023 ± 0.001460.0019 ± 0.00221
Descending Aorta Distensibility, Day 470.0023 ± 0.001180.0023 ± 0.00142
SecondaryChange From Baseline in Aortic Velocity

Summary table for measurements of arterial velocity from cardiac MRI - Mean (SD) \[n\] Aortic distensibility was assessed by MRI and pulse wave velocity using the SphygmoCor device

Time frame:
At pre-dose on Day 1 (baseline) until Day 180 after the start of drug infusion
Reported as:
Mean · cm/s
Change From Baseline in Aortic Velocity
cm/sSerelaxinPlacebo
Peak Flow Velocity (cm/s), Day 0 (n=24, 24)127.981 ± 60.7571106.557 ± 38.9573
Peak Flow Velocity (cm/s), Day 47 (n=23, 25)127.981 ± 60.7571106.557 ± 38.9573
SecondaryChange From Baseline in Augmentation Index Measured From Sphygmocor Device

Summary of values and change from baseline in augmentation index by time and treatment The change from baseline in Augmentation Index was analyzed using a repeated measures analysis of covariance including treatment, time, treatment by time, baseline by time interactions and baseline as fixed factors with an unstructured variance-covariance matrixStatistical analysis of change from baseline in augmentation index using repeated measures Analysis of Covariance

Time frame:
Day1, Day 2, Day 3, Day 30 and Day 180 after the start of infusion
Reported as:
Mean · ratio
Change From Baseline in Augmentation Index Measured From Sphygmocor Device
ratioSerelaxinPlacebo
DAY 1, 2h (n=23,25)-4.12 ± 11.441-2.48 ± 11.560
DAY 1, 6h (n=24,26)-2.99 ± 9.066-0.58 ± 9.551
DAY 2, 24h (n=24,25)-0.82 ± 8.1730.22 ± 9.906
DAY 3, 47h (n=23,25)3.51 ± 10.6080.22 ± 12.057
DAY 3, 50h (n=22, 24)-0.67 ± 13.034-3.81 ± 9.397
DAY 3, 54h (n=22,25)-1.37 ± 12.253-0.48 ± 11.748
DAY 30 (n=25, 26)-0.83 ± 11.4620.58 ± 12.124
DAY 180 (n=24,25) end of study0.24 ± 6.8850.54 ± 11.795
SecondaryStatistical Analysis of Change From Baseline in Augmentation Index Using Repeated Measures Analysis of Covariance

The change from baseline in Augmentation Index was analyzed using a repeated measures analysis of covariance including treatment, time, treatment by time, baseline by time interactions and baseline as fixed factors with an unstructured variance-covariance matrixStatistical analysis of change from baseline in augmentation index using repeated measures Analysis of Covariance For analysis of change from baseline, only subjects with results at both baseline and post-baseline could be included The augmentation index is a ratio calculated from the blood pressure waveform, it is a measure of wave reflection and arterial stiffness. Augmentation index is commonly accepted as a measure of the enhancement (augmentation) of central aortic pressure by a reflected pulse wave

Time frame:
Day1, Day 2, Day 3, Day 30 and Day 180 after the start of infusion
Reported as:
Mean · ratio
Statistical Analysis of Change From Baseline in Augmentation Index Using Repeated Measures Analysis of Covariance
ratioSerelaxinPlacebo
DAY 1, 2h (n=23,25)-4.088 (-7.967 to -0.210)-1.970 (-5.693 to 1.753)
DAY 1, 6h (n=24,26)-3.277 (-6.129 to -0.425)-0.394 (-3.139 to 2.352)
DAY 2, 24h (n=24,25)-0.774 (-4.016 to 2.469)0.070 (-3.108 to 3.247)
DAY 3, 47h (n=23,25)3.488 (-0.470 to 7.445)0.035 (-3.778 to 3.849)
DAY 3, 50h (n=22, 24)-0.764 (-5.208 to 3.680)-4.015 (-8.273 to 0.243)
DAY 3, 54h (n=22,25)-1.737 (-5.915 to 2.440)-0.753 (-4.689 to 3.182)
DAY 30 (n=25, 26)-0.979 (-4.912 to 2.954)0.776 (-3.081 to 4.633)
DAY 180 (n=24,25) end of study0.234 (-3.066 to 3.535)0.284 (-2.950 to 3.518)
SecondaryChange From Baseline in Pulse Wave Velocity Measured From Carotid-femoral Pulse Wave Analysis

Pulse wave velocity was assessed by the SphygmoCor device

Time frame:
Day1, Day 2, Day 3, Day 30 and Day 180 after the start of infusion
Reported as:
Mean · meters/second
Change From Baseline in Pulse Wave Velocity Measured From Carotid-femoral Pulse Wave Analysis
meters/secondSerelaxinPlacebo
DAY 1, 0hrs (n=25,26)7.453 ± 2.05418.166 ± 1.9515
DAY 2, 24hrs (n=19,24)7.051 ± 1.87907.677 ± 2.1361
DAY 3, 47hrs (n=22,23)7.195 ± 1.91648.264 ± 2.4964
DAY 30, 0hrs (n=23, 24)7.989 ± 1.81518.463 ± 2.4437
DAY 3, 47hrs (n=23,25)29.57 ± 9.75126.04 ± 10.039
DAY 180 EOS (n=23,24)8.335 ± 2.10878.844 ± 2.1739
SecondarySerum Concentration of Serelaxin

Summary statistics of serelaxin serum PK concentrations Blood samples were taken to measure serelaxin concentration

Time frame:
Day1, Day 2, Day 3 and Day 30 after the start of infusion
Reported as:
Mean · pg/mL
Serum Concentration of Serelaxin
pg/mLSerelaxin
DAY 1, 0hrs (n=30)0.637 ± 3.49
DAY 2, 24hrs, (n=26)27600 ± 79000
DAY 3, 48hrs (n=22)26300 ± 48000
DAY 3, 50 hrs (n=21)7940 ± 8450
DAY 3, 54hrs, (n=22)3960 ± 3140
DAY 30 (n=30)0.00 ± 0.00
SecondarySerum Concentration of Antibodies to Serelaxin

Frequency and percentage of anti-Serelaxin antibodies Blood samples were taken to measure antibodies to serelaxin concentration at Pre-dose on Day 1, and at Day 30 after the start of the 48h drug infusion

Time frame:
From pre-dose on Day 1 until Day 30 after the start of drug infusion
Reported as:
Number · percentage of participants
Serum Concentration of Antibodies to Serelaxin
percentage of participantsSerelaxinPlacebo
DAY 1 NEGATIVE100100
DAY 1 POSITIVE00
DAY 30 NEGATIVE100100
DAY 30 POSITIVE00
SecondarySystemic Clearance of Serelaxin

Systemic clearance was estimated using the rate of serelaxin infusion and the steady state concentration

Time frame:
From pre-dose on Day 1 until 48h after the start of drug infusion
Reported as:
Mean · mL/hr/kg
Systemic Clearance of Serelaxin
mL/hr/kgSerelaxin
Systemic Clearance of Serelaxin107 ± 80.6

Adverse events

Collected over Day 180. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Serelaxin—5/30 (16.7%)16/30 (53.3%)
Placebo—7/28 (25%)18/28 (64.3%)
Most frequent serious events
Showing 10 of 16
Most frequent serious events
EventSerelaxinPlacebo
Acute myocardial infarctionCardiac disorders2/301/28
Angina pectorisCardiac disorders1/301/28
Angina unstableCardiac disorders1/301/28
Type IV hypersensitivity reactionImmune system disorders0/301/28
PneumoniaInfections and infestations0/301/28
Cardiac procedure complicationInjury, poisoning and procedural complications0/301/28
Vascular procedure complicationInjury, poisoning and procedural complications0/301/28
PresyncopeNervous system disorders0/301/28
HypoxiaRespiratory, thoracic and mediastinal disorders0/301/28
Pleural effusionRespiratory, thoracic and mediastinal disorders0/301/28
Most frequent other events
Showing 10 of 56
Most frequent other events
EventSerelaxinPlacebo
HeadacheNervous system disorders2/304/28
Angina pectorisCardiac disorders0/302/28
Haemoglobin decreasedInvestigations2/302/28
DizzinessNervous system disorders2/302/28
AnaemiaBlood and lymphatic system disorders0/301/28
TachycardiaCardiac disorders0/301/28
DyspepsiaGastrointestinal disorders0/301/28
Feeling coldGeneral disorders0/301/28
Influenza like illnessGeneral disorders0/301/28
Lower respiratory tract infectionInfections and infestations0/301/28

Baseline characteristics

Age, Continuous
Age, Continuous(Years)SerelaxinPlaceboTotal
Mean62.6 ± 6.4260.1 ± 7.0561.4 ± 6.79
Sex: Female, Male
Sex: Female, Male(Participants)SerelaxinPlaceboTotal
Female325
Male272653
08

Study locations

3 sites
  • Novartis Investigative Site
    Clydebank, West Dumbartonshire G81 4HX, United Kingdom
  • Novartis Investigative Site
    Edinburgh, EHN 2XU, United Kingdom
  • Novartis Investigative Site
    Leicester, LE3 9QP, United Kingdom
09

References and documents

Individual participant data

Plan to share: Undecided — Novartis is committed to sharing with qualified external researchers, access to patient-level data and supporting clinical documents from eligible studies. These requests are reviewed and approved by an independent review panel on the basis of scientific merit. All data provided is anonymized to respect the privacy of patients who have participated in the trial in line with applicable laws and regulations. This trial data availability is according to the criteria and process described on www.clinicalstudydatarequest.com

No publications or documents are linked to this record.

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 1, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT01979614
Lead sponsor
Novartis Pharmaceuticals
Responsible party
Sponsor
First posted
Nov 8, 2013
Start date
Feb 3, 2014
Primary completion
Aug 17, 2016
Completion
Aug 17, 2016
Results posted
Jul 1, 2019
Last update
Jul 1, 2019

Study contacts

Novartis Pharmaceuticals
study director · Novartis Pharmaceuticals

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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