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RecruitingNCT06061549MUSIC-HFpEFUpdated Sep 29, 2023

Modulation of SERCA2a of Intra-myocytic Calcium Trafficking in Heart Failure With Preserved Ejection Fraction

A Phase 1 interventional study of AAV1/SERCA2a in Heart Failure, Diastolic and Heart Failure With Preserved Ejection Fraction, sponsored by Sardocor Corp.. Recruiting at 2 sites in United States. Open to participants aged 50 Years and older. Per ClinicalTrials.gov, last updated 2023-09-29.

Sponsored by Sardocor Corp. · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Aug 2025, 1 year 2 months ago, but the record still lists the study as recruiting.
  • Started Aug 2023; still recruiting 3 years 1 month later.
Phase
Phase 1
Study type
Interventional
Enrollment
10
Allocation
Not applicable
Ages
50 Years and older
Sex
All
01

Study summary

The goal of this clinical trial is to test an experimental gene therapy in participants with heart failure with preserved ejection fraction, also known as diastolic heart failure. The main questions it aims to answer are:

  • safety and tolerability of the gene therapy; and
  • whether the gene therapy helps the heart ventricles relax during filling. Participants will undergo a one-time infusion of the gene therapy in the cardiac catheterization laboratory and then be followed for safety and effects on left-sided filling pressures while exercising. The first year will have multiple in-person visits followed by 4 years of biannual phone calls.
Read the detailed description

Eligible participants will undergo a one-time antegrade epicardial coronary artery infusion of gene therapy delivered to the 3 major cardiac territories of the left ventricle of the heart (anterior, lateral, inferior/posterior) or bypass grafts unless contraindicated. Post-procedure, the subject will be monitored continuously for a minimum of 4 hours and then discharged to home that same day if medically appropriate. Participants will be followed for 52 weeks as part of the main trial. On Day 2 and Week 1, subjects will be contacted by phone for a general safety assessment, and if clinically indicated, an in-person evaluation and assessment will be performed as soon as possible. On Weeks 2, 4, 12, 24 and 52, subjects will undergo general safety assessments. Additionally, at Weeks 24 and 52, subjects will undergo outpatient core resting and exercise transthoracic echocardiography, right heart catheterization with hemodynamic monitoring and gas exchange measurements, 6-minute wall test, cardiac biomarker testing and completion the Kansas City Cardiomyopathy Questionnaire. Upon completion of the active observation period, participants will continue to be followed for 4 years with bi-annual, semi-structured telephone or in-person questionnaires that collect information on overall status and other comorbid conditions of interest in gene therapy trials.

02

Conditions studied

  • Heart Failure, Diastolic
  • Heart Failure With Preserved Ejection Fraction
03

In context

Heart Failure

5,701 studies on the registry are indexed under Heart Failure; 1,220 are open to participants now.

This study's planned enrollment of 10 is below the median of 72 across 3,736 interventional studies indexed under Heart Failure.

Browse Heart Failure studies →

Lead sponsor

Sardocor Corp. is the lead sponsor of 3 studies on the registry; 3 are open to participants now.

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

04

Who can participate

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

Inclusion criteria

  • Willing and able to provide informed consent
  • Negative for anti-AAV1 neutralizing antibodies
  • NYHA class II or III
  • Left ventricular ejection fraction ≥ 50%
  • Evidence of resting or exercise-induced left ventricle filling pressure
  • On oral diuretic therapy
  • Adequate birth control

Exclusion criteria

Exclusion Criteria:

  • NYHA class IV
  • Heart failure requiring hospitalization in the past 3 months
  • Manifested or provocable ischemic heart disease
  • Atrial fibrillation
  • History of congenital heart disease, restrictive or infiltrative cardiomyopathy, hypertrophic cardiomyopathy, acute myocarditis, pericardial disease, uncorrected thyroid disease or discrete left ventricular (LV) aneurysm
  • History of amyloidosis
  • Untreated left-sided valvular disease
  • Severe COPD
  • BMI > 50 kg/m\^2
  • Severe liver, kidney or hematologic dysfunction
  • Cancer within the past 5 years
  • Unstable concurrent conditions
05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
10 participants (estimated)

Study arms

  • Experimental
    SRD-001 Gene Therapy

    AAV1/SERCA2a 3E13 vg

    Biological: AAV1/SERCA2a

Interventions

  • BiologicalAAV1/SERCA2a

    3E13 viral genomes fixed dose

06

What researchers measure

Primary outcomes

  1. Change in pulmonary capillary wedge pressure (PCWP)

    PCWP assessed by right heart catheterization; change in mmHg from baseline

    Time frame: Week 24 and Week 52

Secondary outcomes

  1. Change in PCWP at 20W exercise

    PCWP assessed by right heart catheterization; change in mmHg from baseline

    Time frame: Week 24 and Week 52

  2. Change in oxygen uptake (VO2) during exercise

    VO2 assessed by bicycle exercise; change in mL/min from baseline

    Time frame: Week 24 and Week 52

  3. Change in left ventricular (LV) relaxation

    Assessed by transesophageal echocardiography (ultrasound) using 2 methods: LV global peak early diastolic strain rate (1/s) and LV tau

    Time frame: Week 24 and Week 52

  4. Change in NT-proBNP

    Laboratory measurement (picograms per mL) in blood; high levels indicate the heart is working too hard to pump blood; decrease over time would indicate an improvement in heart failure condition

    Time frame: Week 24 and Week 52

  5. Change in left atrial end systolic volume

    Assessed by transesophageal echocardiography (ultrasound); change in mL/m2 from baseline

    Time frame: Week 24 and Week 52

  6. Change in left atrial reservoir strain

    Assessed by transesophageal echocardiography (ultrasound); change in %from baseline

    Time frame: Week 24 and Week 52

  7. Change in left atrial contractile strain

    Assessed by transesophageal echocardiography (ultrasound); change in % from baseline

    Time frame: Week 24 and Week 52

  8. Change in 6 Minute Walk Distance

    Distance walked in 6 minutes, measured in meters; the longer distance walked, the better medical condition

    Time frame: Week 24 and Week 52

  9. Change in 6 Minute Walk Test Borg scale

    Self-rated shortness of breath score with scale from 0 to 10, ranging from none to very, very severe

    Time frame: Week 24 and Week 52

  10. Change in Kansas City Cardiomyopathy Questionnaire (KCCQ) score

    Measures symptoms, physical and social limitations, and quality of life in patients with heart failure; 23-item self-administered questionnaire; score of 0 to 100; 0-24, very poor to poor; 25-49, poor to fair; 50 to 74, faire to good; and 75 to 100, good to excellent

    Time frame: Week 24 and Week 52

  11. Change in New York Heart Association class

    Classification of heart failure based on severity of symptoms; 4 classes, I, II, III or IV where class I is having no symptoms doing ordinary physical activity; class II is having fatigue, shortness of breath, palpitations or angina with ordinary physical activity; class II is being comfortable only at rest; and class IV is having symptoms even at rest

    Time frame: Week 24 and Week 52

07

Study locations

1 of 2 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 29, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06061549
Lead sponsor
Sardocor Corp.
Responsible party
Sponsor
First posted
Sep 29, 2023
Start date
Aug 24, 2023
Primary completion
Aug 2025 (estimated)
Completion
Aug 2029 (estimated)
Last update
Sep 29, 2023

Study contacts

Sardocor
Contact
info@sardocorcorp.com
858-752-2941

Oversight

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

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