Allogeneic hMSC Injection in Patients With Hypoplastic Left Heart Syndrome (ELPIS)

• ClinicalTrials.gov Identifier: NCT02398604
• Recruitment Status: Terminated
• First Posted: March 25, 2015
• Last Update Posted: July 19, 2021
• Sponsor: Longeveron Inc.
• Information provided by (Responsible Party): Longeveron Inc.

Study Description

Brief Summary:

This study is intended to evaluate the safety and feasibility of intramyocardial injection of allogeneic mesenchymal cells during the Bi-Directional Cavopulmonary Anastomosis (BDCPA) surgery for hypoplastic left heart syndrome (HLHS) pediatric patients.

Condition or disease	Intervention/treatment	Phase
Hypoplastic Left Heart Syndrome	Drug: Allo-hMSCs; Drug: Placebo	Phase 1

Detailed Description:

This is an open label study, intended as a safety and efficacy assessment prior to a full comparator study. In this Phase I study, cells administered will be delivered in 6-10 intramyocardial injections that will be tested in 20 patients and 10 patients will be controls with a total of 30 HLHS patients.

A total of 30 patients with HLHS will be enrolled in a staged enrollment process. In this open-labeled study, a maximum of 20 patients will eventually receive intramyocardial injection of the allogeneic mesenchymal stem cells and 10 control patients with no cell injection. The enrollment of the patients will occur in two stages groups: Group A and Group B. In Group A, 10 consecutive HLHS patients will be initially enrolled in the allogenic MSCs treatment arm to determine feasibility and safety. After 6 months of the last enrolled patient in Group A, all Group A patients will be assessed in order to determine whether it is feasible and safe, including the harvesting, processing, and administering of the allogeneic MSCs. Thereafter, Group B will start enrolling a total of 20 HLHS patients which will be randomized to the treatment and control arms in a 1:1 ratio, respectively, in order to have 10 allogeneic MSCs-treated patient and 10 control patients. At the completion of this Phase I clinical study, the total enrolled cohort will be 20 patients treated with allogeneic MSCs and 10 patients in the control arm.

Study Design

• Study Type: Interventional (Clinical Trial)
• Actual Enrollment: 5 participants
• Allocation: Randomized
• Intervention Model: Parallel Assignment
• Intervention Model Description: 20 patients and 10 patients will be controls with a total of 30 HLHS patients.
• Masking: None (Open Label)
• Masking Description: HLHS patients which will be randomized to the treatment and control arms in a 1:1 ratio
• Primary Purpose: Treatment
• Official Title: Allogeneic Human MEsenchymal Stem Cell (hMSC) Injection in Patients With Hypoplastic Left Heart Syndrome: An Open Label Pilot Study.
• Study Start Date: April 2015
• Actual Primary Completion Date: March 2019
• Actual Study Completion Date: March 2019

Arms and Interventions

Arm	Intervention/treatment
Experimental: Group A - Allo-hMSCs; Group A: Fifteen (20) patients will be treated with Allogenic human mesenchymal stem cells (Allo-hMSCs): A concentration of 5 million cells/ml delivered in a dose of 2.5 x 10^5 cells per kg of recipient (5 million/20kg) Allo-hMSCs. The entire dose of the cells will be divided and delivered in 6-10 open intramyocardial injections during the BDCPA operation.	Drug: Allo-hMSCs; Allogeneic Human Mesenchymal Stem Cells; Other Name: stem cells; Allogeneic Human Mesenchymal Stem Cells
Placebo Comparator: Group B; Group B: Fifteen (10) patients will be treated with a placebo comparator. The placebo will be divided and delivered in 6-10 open intramyocardial injections during the BDCPA operation.	Drug: Placebo; Placebo; Other Name: Placebo comparator

Outcome Measures

Primary Outcome Measures :

1. Monitor major adverse cardiac events [ Time Frame: 1 month after injection ]
   Monitoring of events includes death, sustained/symptomatic ventricular tachycardia requiring intervention with inotropic support, aggravation of heart failure, new myocardial infarction, unplanned cardiovascular operation for cardiac tamponade and infection in the first month after injection, and serially afterwards.

Secondary Outcome Measures :

1. Composite Change from baseline in right ventricular function, right ventricular end-diastolic volume, right ventricular end-systolic volume, right ventricular end-systolic diameter and tricuspid regurgitation [ Time Frame: baseline, 24 weeks and 1 year ]
   as measured by serial echocardiograms and MRI scans.
2. Number of participants with incidence of mortality or need for transplantation after the BDCPA operation [ Time Frame: One year after injections ]
   Assessed through the number of participants with adverse events, hospitalizations, or transplantations.
3. Composite Changes in somatic growth velocity over time (weight, height, head circumference) from the BDCPA operation [ Time Frame: 12 months post operative ]
   Changes in weight, height, and head circumference will be measured
4. Assessment of Co-morbidity [ Time Frame: up to 12 months follow-up ]
   Assessment of cardiovascular mortality, all-cause morbidity, Cardiovascular morbidity, re-hospitalizations, need for transplantation.

Eligibility Criteria

• Ages Eligible for Study: up to 30 Days (Child)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Criteria

Inclusion Criteria:

• Subjects with hypoplastic left heart syndrome (all types) requiring BDCPA surgery.

Exclusion Criteria:

• Have HLHS and restrictive or intact atrial septum.
• Be undergoing the Norwood procedure that do not have HLHS.
• Have significant coronary artery sinusoids.
• Require mechanical circulatory support prior to surgery.
• Have an underlying evidence of arrhythmia requiring anti-arrhythmia therapy.
• Parent or guardian unwilling or unable to comply with necessary follow-up(s)
• Be serum positive for HIV, hepatitis BsAg (B Surface Antigen) or viremic hepatitis C.
• Be unsuitable for inclusion in the study, in the opinion of the investigator.
• Need for concomitant surgery for aortic coarctation or tricuspid valve repair.

Contacts and Locations

Locations

United States, Maryland

University of Maryland Medical Center

Baltimore, Maryland, United States, 21201

Johns Hopkins Hospital

Baltimore, Maryland, United States, 21287

Sponsors and Collaborators

Longeveron Inc.

Investigators

• Principal Investigator: Anthony Oliva, MD; Longeveron Inc.

More Information

Additional Information:

Interdisciplinary Stem Cell Institute 

• Responsible Party: Longeveron Inc.
• ClinicalTrials.gov Identifier: NCT02398604
• Other Study ID Numbers: 20140718
• First Posted: March 25, 2015
• Last Update Posted: July 19, 2021
• Last Verified: July 2021

Individual Participant Data (IPD) Sharing Statement:

• Plan to Share IPD: Undecided

• Studies a U.S. FDA-regulated Drug Product: Yes
• Studies a U.S. FDA-regulated Device Product: No

Keywords provided by Longeveron Inc.:

Pediatrics; HLHS

Additional relevant MeSH terms:

Hypoplastic Left Heart Syndrome; Syndrome; Disease; Pathologic Processes; Heart Defects, Congenital; Cardiovascular Abnormalities; Cardiovascular Diseases; Heart Diseases; Congenital Abnormalities