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Completed

NCT Number: NCT02501811

Combination of Mesenchymal and C-kit+ Cardiac Stem Cells as Regenerative Therapy for Heart Failure

This is a phase II, randomized, placebo-controlled clinical trial designed to assess feasibility, safety, and effect of autologous bone marrow-derived mesenchymal stem cells (MSCs) and c-kit+ cells both alone and in combination (Combo), compared to placebo (cell-free Plasmalyte-A medium) as well as each other, administered by transendocardial injection in subjects with ischemic cardiomyopathy.

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Key information

Conditions

Ischemic Cardiomyopathy Cardiovascular Diseases Heart Diseases Heart Failure Ischemia Pathologic Processes Pathological Conditions, Signs and Symptoms Ventricular Dysfunction Ventricular Dysfunction, Left

Age range

21 year–79 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Stanford University School of Medicine (Falk Cardiovascular Research Center), Stanford, California, United States

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About this study

This is a randomized, placebo-controlled clinical trial designed to evaluate the feasibility, safety, and effect of Combo, MSCs alone, and c-kit+ cells alone compared with placebo as well as each other in subjects with heart failure of ischemic etiology. Following a successful lead-in phase, a total of one hundred forty-four (144) subjects will be randomized (1:1:1:1) to receive Combo, MSCs, c-kit+ cells, or placebo. After randomization, baseline imaging, relevant harvest procedures, and study product injection, subjects will be followed up at 1 day, 1 week, 1 month, 3 months, 6 months and 12 months post study product injection. All subjects will receive study product injection (cells or placebo) using the NOGA® XP Mapping and Navigation System. Subjects will have delayed-enhanced magnetic resonance imaging (DEMRI) scans to assess scar size and LV function and structure at baseline and at 6 and 12 months post study product administration. All endpoints will be assessed at the 6 and 12 month visits which will occur 180 ±30 days and 365 ±30 days respectively from the day of study product injection (Day 0). For the purpose of the endpoint analysis and safety evaluations, the Investigators will utilize an "intention-to-treat" study population, however an as treated analysis will also be conducted.

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • Be ≥ 21 and <80 years of age
  • Have documented coronary artery disease (CAD) with evidence of myocardial injury, LV dysfunction, and clinical evidence of HF
  • Have a "detectable" area of myocardial injury defined as ≥ 5% LV involvement (infarct volume) and any subendocardial involvement by cMRI
  • Have an EF ≤ 40% by cMRI
  • Be receiving guideline-driven medical therapy for heart failure at stable and tolerated doses for ≥ 1 month prior to consent. For beta-blockade "stable" is defined as no greater than a 50% reduction in dose or no more than a 100% increase in dose.
  • Be a candidate for cardiac catheterization
  • Have NYHA class I, II, or III heart failure symptoms
  • If a female of childbearing potential, be willing to use one form of birth control for the duration of the study, and undergo a pregnancy test at baseline and within 36 hours prior to injection

Exclusion criteria

  • Indication for standard-of-care surgery (including valve surgery, placement of left-ventricular assist device, or imminent heart transplantation), coronary artery bypass grafting (CABG) procedure, and/or percutaneous coronary intervention (PCI) for the treatment of ischemic and/or valvular heart disease. Subjects who require or undergo PCI should undergo these procedures a minimum of 3 months in advance of randomization. Subjects who require or undergo CABG should undergo these procedures a minimum of 4 months in advance of randomization. In addition, subjects who develop a need for revascularization following enrollment should undergo revascularization without delay. Indication for imminent heart transplantation is defined as a high likelihood of transplant prior to collection of the 12 month study endpoint. Candidates cannot be UNOS status 1A or 1B, and they must have documented low probability of being transplanted
  • Valvular heart disease including 1) mechanical or bioprosthetic heart valve; or 2) severe (any valve) insufficiency/regurgitation within 12 months of consent
  • Aortic stenosis with valve area ≤ 1.5 cm2
  • History of ischemic or hemorrhagic stroke within 90 days of consent
  • History of a left ventricular remodeling surgical procedure utilizing prosthetic material
  • Presence of a pacemaker and/or implantable cardioverter-defibrillator (ICD) generator with any of the following limitations/conditions:
  • manufactured before the year 2000
  • leads implanted < 6 weeks prior to consent
  • non-transvenous epicardial, or abandoned leads
  • subcutaneous ICDs
  • leadless pacemakers
  • any other condition that, in the judgment of device-trained staff, would deem an MRI contraindicated
  • Pacemaker-dependence with an ICD (Note: pacemaker-dependent candidates without an ICD are not excluded)
  • A cardiac resynchronization therapy (CRT) device implanted less than 3 months prior to consent
  • Other MRI contraindications (e.g. patient body habitus incompatible with MRI)
  • An appropriate ICD firing or anti-tachycardia pacing (ATP) for ventricular fibrillation or ventricular tachycardia within 30 days of consent
  • Ventricular tachycardia ≥ 20 consecutive beats without an ICD within 3 months of consent, or symptomatic Mobitz II or higher degree atrioventricular block without a functioning pacemaker within 3 months of consent
  • Presence of LV thrombus
  • Evidence of active myocarditis
  • Baseline maximal oxygen consumption (VO2 max) greater than 75% of age and gender based predictive values
  • Baseline eGFR <35 ml/min/1.73m2
  • Blood glucose levels (HbA1c) >10%
  • Hematologic abnormality evidenced by hematocrit < 25%, white blood cell < 2,500/ul or platelet count < 100,000/ul
  • Liver dysfunction evidenced by enzymes (AST and ALT) ˃ 3 times the upper limit of normal (ULN)
  • Coagulopathy (INR ≥ 1.3) not due to a reversible cause (e.g., warfarin and/or Factor Xa inhibitors). Subjects who cannot be withdrawn from anticoagulation will be excluded.
  • HIV and/or active hepatitis B virus (HBV) or hepatitis C virus (HCV)
  • Allergy to radiographic contrast material that cannot adequately be managed by premedication
  • Known history of anaphylactic reaction to penicillin or streptomycin
  • Received gene or cell-based therapy from any source within the previous 12 months
  • History of malignancy within 5 years (i.e., subjects with prior malignancy must be disease free for 5 years), excluding basal cell carcinoma and cervical carcinoma in situ which have been definitively treated
  • Condition that limits lifespan to < 1 year
  • History of drug abuse (illegal "street" drugs except marijuana, or prescription medications not being used appropriately for a pre-existing medical condition) or alcohol abuse (≥ 5 drinks/day for ˃ 3 months), or documented medical, occupational, or legal problems arising from the use of alcohol or drugs within the past 24 months
  • Participation in an investigational therapeutic or device trial within 30 days of consent
  • Cognitive or language barriers that prohibit obtaining informed consent or any study elements
  • Pregnancy or lactation or plans to become pregnant in the next 12 months
  • Any other condition that, in the judgment of the Investigator or Sponsor, would impair enrollment, study product administration, or follow-up

Treatment and study plan

Mesenchymal stem cells (MSC)

Biological

15 transendocardial injections of 0.4ml MSCs administered to the left ventricle via NOGA Myostar injection catheter (single procedure)

c-kit+ cells

Biological

15 transendocardial injections of 0.4ml c-kit+ cells administered to the left ventricle via NOGA Myostar injection catheter (single procedure)

Placebo (Plasmalyte A)

Biological

15 transendocardial injections of 0.4ml placebo administered to the left ventricle via NOGA Myostar injection catheter (single procedure)

Other names: Plasmalyte A

Primary outcomes

  1. Change From Baseline in Left Ventricular Ejection Fraction (LVEF)

    Time frame: Baseline to 6 months

    Change in left ventricular ejection fraction as assessed via cardiac MRI

  2. Change From Baseline in Global Strain (HARP MRI)

    Time frame: Baseline to 6 months

    Change in global circumferential strain as assessed via cardiac MRI

  3. Change From Baseline in Regional Strain (HARP MRI)

    Time frame: Baseline to 6 months

    Change in regional longitudinal strain as assessed via cardiac MRI

  4. Change From Baseline in Left Ventricular End Diastolic Volume Index (LVEDVI)

    Time frame: Baseline to 6 months

    Change in left ventricular end diastolic volume index as measured via cardiac MRI

  5. Change From Baseline in Left Ventricular End Systolic Volume Index (LVESVI)

    Time frame: Baseline to 6 months

    Change in left ventricular end systolic volume index as assessed via cardiac MRI

  6. Change From Baseline in Left Ventricular Sphericity Index

    Time frame: Baseline to 6 months

    Change in left ventricular sphericity as assessed via cardiac MRI. Sphericity index is the ratio of the long and short axis measurements of the left ventricle.

  7. Change From Baseline in Scar Size Percent (DEMRI)

    Time frame: Baseline to 6 months

    Change in scar size percent as assessed via cardiac MRI

  8. Change From Baseline in Scar Tissue Mass (DEMRI)

    Time frame: Baseline to 6 months

    Change in scar tissue mass as assessed via cardiac MRI

  9. Change From Baseline in Maximal Oxygen Consumption (Peak VO2)

    Time frame: Baseline to 6 months

    Change in maximal oxygen consumption (peak V02) as assessed via treadmill

  10. Change From Baseline in Exercise Tolerance (Six Minute Walk Test)

    Time frame: Baseline to 6 months

    Change in distance walked (in meters) as measured by the 6 minute walk test. Two walk tests were completed at each endpoint visit (separated by 30 minutes). The average distance of the two walk tests was used for analysis.

  11. Change From Baseline in Minnesota Living With Heart Failure Questionnaire (MLHFQ) Score

    Time frame: Baseline to 6 months

    Change in the quality of life summary score as measured by the Minnesota Living with Heart Failure Questionnaire. Minimum and maximum scores for the scale are 0 and 105 respectively. Lower scores indicative of better outcomes.

  12. Change From Baseline in N-Terminal Pro-Brain Natriuretic Peptide (NT-proBNP)

    Time frame: Baseline to 6 months

    Change in N-Terminal pro-Brain Natriuretic Peptide (NT-proBNP) as measured via laboratory blood draw

  13. Change From Baseline in Left Ventricular Ejection Fraction (LVEF)-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, and 12 months)

    The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The second set of results reflects an overall model with all patients and the results represent the change per 6 months irrespective of treatment arm.

  14. Change From Baseline in Global Strain (HARP MRI)-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, and 12 months)

    The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The second set of results reflects an overall model with all patients and the results represent the change per 6 months irrespective of treatment arm.

  15. Change From Baseline in Regional Strain (HARP MRI)-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, and 12 months)

    The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The second set of results reflects an overall model with all patients and the results represent the change per 6 months irrespective of treatment arm.

  16. Change From Baseline in Left Ventricular End Diastolic Volume Index (LVEDVI)-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, and 12 months)

    The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The second set of results reflects an overall model with all patients and the results represent the change per 6 months irrespective of treatment arm.

  17. Change From Baseline in Left Ventricular End Systolic Volume Index (LVESVI)-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, 12 months)

    The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The second set of results reflects an overall model with all patients and the results represent the change per 6 months irrespective of treatment arm.

  18. Change From Baseline in Left Ventricular Sphericity Index-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, and 12 months)

    Sphericity index is the ratio of the long and short axis measurements of the left ventricle. The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The second set of results reflects an overall model with all patients and the results represent the change per 6 months irrespective of treatment arm.

  19. Change From Baseline in Scar Size Percent (DEMRI)-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, and 12 months)

    The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The second set of results reflects an overall model with all patients and the results represent the change per 6 months irrespective of treatment arm.

  20. Change From Baseline in Scar Tissue Mass (DEMRI)-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, and 12 months)

    The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The second set of results reflects an overall model with all patients and the results represent the change per 6 months irrespective of treatment arm.

  21. Change From Baseline in Maximal Oxygen Consumption (Peak VO2)-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, and 12 months)

    The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The second set of results reflects an overall model with all patients and the results represent the change per 6 months irrespective of treatment arm.

  22. Change From Baseline in Exercise Tolerance (Six Minute Walk Test)-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, and 12 months)

    Two walk tests were completed at each endpoint visit (separated by 30 minutes). The average distance of the two walk tests was used for analysis. The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The second set of results reflects an overall model with all patients and the results represent the change per 6 months irrespective of treatment arm.

  23. Change From Baseline in Minnesota Living With Heart Failure Questionnaire (MLHFQ) Score-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, and 12 months)

    Minimum and maximum scores for the scale are 0 and 105 respectively. Lower scores indicative of better outcomes. The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The 2nd and 3rd set of results represent differences for varying slopes from the interaction model.

  24. Change From Baseline in N-Terminal Pro-Brain Natriuretic Peptide (NT-proBNP)-Trajectory

    Time frame: Assessed as a trajectory (baseline, 6 months, and 12 months)

    Log transformation used. The change in this measure over time is assessed using a repeated measures linear regression model of trajectory (change over time). The first set of results reflects the model within each arm and represents change per 6 months within that treatment arm. The second set of results reflects an overall model with all patients and the results represent the change per 6 months irrespective of treatment arm.

  25. Participants With Major Adverse Cardiac Events (MACE)

    Time frame: Baseline to End of 12 Month Visit Window, an average of 395 days following study product injection

    Number of participants with adjudicated events including death, hospitalization for worsening heart failure, and/or other exacerbation of heart failure (non-hospitalization).

  26. Participants Experiencing Other Significant Clinical Events

    Time frame: Baseline to End of 12 Month Visit Window, an average of 395 days following study product injection

    Number of participants experiencing other significant adjudicated clinical events including: non-fatal stroke, non-fatal MI, coronary artery revascularization, ventricular tachycardia/fibrillation, and pericardial tamponade

  27. Cumulative Days Alive and Out of Hospital for Heart Failure

    Time frame: Baseline to End of 12 Month Visit Window, an average of 395 days following study product injection

    Days alive and out of hospital during the study evaluation period. Subjects were allotted a visit window extending 30 days past their anticipated 12-month visit. Some participants had extended 12-month visit windows due to the COVID-19 pandemic.

Other outcomes

  1. Subjects With Events Between Randomization and Study Product Injection (SPI) That Preclude the Receipt of Product

    Time frame: Randomization to SPI, an average of 14 weeks

    Number and percent of subjects with events between randomization and study product injection (SPI) that preclude the subject from receiving product. Reasons include those who did not undergo harvest (n=6; death, subject withdraw, subject changed mind) and those who did not undergo SPI (n=9; death, LVAD placement, episodes of ventricular tachycardia, and cancelled procedures)

  2. Subjects Who Have a Failed Bone Marrow Aspiration Procedure

    Time frame: During bone marrow aspiration procedure

    Number and percent of subjects who do not successfully undergo bone marrow aspiration

  3. Subjects Who Have a Failed Endomyocardial Biopsy Procedure

    Time frame: During endomyocardial biopsy procedure

    Number and percent of subjects who do not successfully undergo endomyocardial biopsy procedure. Note only participants who were assigned to MSC+CPC or to CPC groups had endomyocardial biopsy procedures attempted.

  4. Subject MSC Products Which Failed Release Criteria

    Time frame: Harvest to Study Product Injection Procedure

    Number and percent of subjects who have MSC products which failed release criteria

  5. Subject CPC Products Which Failed Release Criteria

    Time frame: Harvest to Study Project Injection procedure

    Number and percent of subjects who have CPC products which failed release criteria

  6. Subjects Who Receive Less Than 15 Injections During SPI

    Time frame: During SPI procedure

    Number and percent of subjects who received less than 15 injections during SPI

  7. Subjects Who Have at Least One Cardiac MRI Endpoint Measure That is Uninterpretable

    Time frame: Baseline to 12 months

    Number and percent of subjects who have at least one cardiac MRI endpoint measure that is uninterpretable due to issues related to the device, including, but not limited to, inability to undergo the procedure

Sponsors and collaborators

Lead sponsor

The University of Texas Health Science Center, Houston

Other

Collaborators

  • National Heart, Lung, and Blood Institute (NHLBI)

Registry information

Official study title

A Phase II, Randomized, Placebo-Controlled Study of the Safety, Feasibility, & Efficacy of Autologous Mesenchymal Stem Cells & C-kit+ Cardiac Stem Cells, Alone or in Combination, Administered Transendocardially in Subjects With Ischemic HF

Acronym: CONCERT-HF

Important dates

Study start
2015
Primary completion
2020
Study completion
2020
First posted
Jul 17, 2015
Registry last updated
Apr 26, 2021

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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