Safety and Efficacy Evaluation of Intracoronary Infusion of Allogeneic Human Cardiac Stem Cells in Patients With AMI

Condition(s) targeted: Acute Myocardial Infarction

Intervention: Allogeneic human cardiac stem cells (CSCs) (Other); Human Serum Albumin-HSA 5% (Other)

Phase: Phase 1/Phase 2

Status: Recruiting

Sponsored by: Coretherapix

Official(s) and/or principal investigator(s):
Marie Paule Richard, MD, Study Director, Affiliation: Coretherapix (Tigenix Group)

Overall contact:
Marie Paule Richard, MD, Phone: 0034 91 804 92 64, Email: mariepaule.richard@tigenix.com

Development of myocardial reparative therapy for the treatment of acute ischemic cardiac disease, based on the intracoronary administration of allogeneic Cardiac Stem Cells (CSCs) to ameliorate myocardial cell death and promote cardio-regeneration. The study comprises two phases: 1. Initial dose-escalation open-label safety phase comprising 6 patients. Escalation will start with the Maximum Recommended Safe Dose (MRSD) calculated from Non-Observed Adverse Events Level (NOAEL) and it is expected to finish with the target dose (TD). There will be no placebo group for this initial phase. 2. Randomized double-blind placebo-controlled safety and efficacy phase in which the TD will be injected if the dose-escalation phase is completed successfully.

Official title: First-in-human, Double Blind, Randomized With Placebo, Open for the 6 First Patients (Dose Ranging) to Evaluate the Safety and Efficacy of Intracoronary Infusion of Allogeneic Human CSCs in Patients With AMI and Left Ventricular Dysfunction

Study design: Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment

Primary outcome: Safety measured as the number of deaths and number of Major Adverse Cardiac Events (MACE)

Secondary outcome:

Efficacy measured by MRI as the infarct size change

Efficacy measured by MRI as the evolution of biomechanical parameters

Efficacy measured by MRI as the evolution of edema

Detailed description: This is a "First in Patient" Clinical Trial to obtain safety and efficacy results about the intracoronary administration of a suspension of allogeneic cardiac stem cells (CSCs) for the treatment of ST elevation Myocardial Infarction (STEMI). This clinical trial will have a first dose-escalation phase in which the safety of 10, 20 and 35 million CSCs administration will be evaluated in 6 patients. A second double-blind randomized and placebo controlled phase will be initiated, if no major safety effects are observed during the first week after cell administration. The 35 million cells dose is the one expected to be used during the randomized phase. Patients with EF<45% and with infarct sizes > 25% will be selected by magnetic resonance image (MRI). 49 patients will be included in the randomized phase with the aim of having 38 patients for efficacy analysis at the end of the follow up period (12 months). In this phase, patients will be randomly allocated for receiving CSCs or placebo in a 2: 1 scheme. Three bioequivalent cellular batches obtained from different donors will be indistinctly used during the assay. CSCs or placebo treatment will be infused into the coronary artery responsible for the ischemic event. Placebo will be a commercial preparation of human serum albumin 5% in saline solution that will also be used for cell product reconstitution. After treatment, patients will be monitored overnight in a coronary care unit for any toxicity and discharged from hospital 24h after treatment if no adverse events are observed. Subsequent safety follow-up will be done first at day 7 after treatment and then monthly or quarterly thereafter for 12 months. In addition, efficacy evaluations will be performed by MRI and clinical parameters at 1, 6 and 12 months after treatment. Finally, cellular and humoral immunological response (screening for anti-HLA (Human Leukocyte Antigen) class I and class II antibodies, HLA typing, cross-matching between cells and treated patient and cytokine profiling in blood samples) will be analysed during the clinical trial.

Minimum age: 18 Years. Maximum age: 80 Years. Gender(s): Both.

Criteria:

Inclusion Criteria:

- Adult patients ≥ 18 years of age and ≤ 80 years.

- Patients presenting a ST-segment-elevation myocardial infarction (STEMI) according to

the universally accepted definition founded in the STEMI management guide of the European Society of Cardiology

- Killip ≤ 2 on admission

- Successful primary coronary revascularization by Percutaneous Coronary Intervention-

PCI - (Thrombolysis In Myocardial Infarction [TIMI] = 3) within 12h after the onset

of infarct symptoms

- Bare-metal or second generation of drug-eluting stents (everolimus or zotarolimus -

DES) at coronary revascularization by PCI

- Ejection Fraction (EF) ≤45% by magnetic resonance imaging (MRI). This MRI will be

done between day 3 and day 5 after infarction and will be used as inclusion MRI

- Infarct size in left ventricle (LV) tested in the first MRI ≥25% The presence of

microvascular obstruction at inclusion MRI is permitted

- The affected coronary artery is adequate for cells infusion at the administration

time. The administration procedure is technically feasible on day 4-7 after coronary revascularization by PCI

- The patient is stable and in adequate clinical condition to undergo the procedure.

Exclusion Criteria:

- Participation in another clinical trial in the last 30 days

- Previous blood transfusion, allogeneic transplant or treated with cell or gene

therapy

- Previous Q-wave infarction

- Significant valve disease, relapsing pericarditis, history of cardiac tamponade,

cardiomyopathies

- Severe stenotic lesions (>90%) in a coronary vessel with size >2. 75 mm not treated by

PCI at least 24 hours before the baseline MRI study

- Previous EF≤45%, NYHA > 2 (New York Heart Association Functional Classification) or

hospital admission for heart failure before STEMI

- Sustained VT that does not revert with treatment or requires >6 hours to be

controlled in the 48 hours prior to the product administration procedure

- Complete atrioventricular blockade, or acute left bundle branch block in the 48 hours

prior to the product administration procedure

- History of cardioembolic disease

- Platelets <100,000 and/or Hb<8. 5g/dL

- Acute or chronic renal failure with creatinine ≥2. 5 mg/dl or creatinine clearance ≤30

mL/min

- Infection with systemic involvement

- Cancer disease, except that eradicated at least 5 years before inclusion, and without

receiving radiotherapy on chest. It is permitted coetaneous non-melanoma neoplasms completely eliminated (at any time) and that do not require subsequent chemotherapy or radiotherapy on chest.

- Child-Pugh's C stage chronic liver disease

- Baseline respiratory failure requiring oxygen at home

- Uncontrolled hypertension at screening despite treatment (systolic blood pressure

[BP] ≥180 and/or diastolic BP ≥110)

- Very poorly controlled diabetes (Hb1Ac ≥8. 5 g/dL) or with serious target organ lesion

(peripheral vascular disease requiring revascularization or non revascularize)

- History of autoimmune disease

- Primary or acquired immune deficiency or immunosuppressant treatment (including

treatments with immunosuppressants in the previous three months, or with systemic corticosteroids in the previous month, or foreseeable need for those treatments during the course of the study).

- Women who are pregnant or breastfeeding or women of childbearing potential who do not

agree to use contraceptives during the study period

- Life expectancy of less than 2 years for any reason.

- Allergy to aminoglycoside antibiotics or HSA hypersensitivity

- Contraindications preventing the use of Magnetic Resonance Imaging: Pacemaker,

Implantable cardioverter-defibrillator (ICD), known reaction to gadolinium, claustrophobia, cochlear implants

Marie Paule Richard, MD, Phone: 0034 91 804 92 64, Email: mariepaule.richard@tigenix.com

Coretherapix (Tigenix Group), Tres Cantos, Madrid 28760, Spain; Recruiting
Marie Paule Richard, MD, Phone: 0034 91 804 92 64, Email: mariepaule.richard@tigenix.com

Natural killer cell crosstalk with allogeneic human cardiac-derived stem/progenitor cells controls persistence.

Allogenicity of human cardiac stem/progenitor cells orchestrated by programmed death ligand

Coretherapix web page

European Clinical Trial Data Base

Spanish Clinical Trial Data Base (Registration code: REec-2014-0865)

Related publications:

Boukouaci W, Lauden L, Siewiera J, Dam N, Hocine HR, Khaznadar Z, Tamouza R, Borlado LR, Charron D, Jabrane-Ferrat N, Al-Daccak R. Natural killer cell crosstalk with allogeneic human cardiac-derived stem/progenitor cells controls persistence. Cardiovasc Res. 2014 Nov 1;104(2):290-302. doi: 10.1093/cvr/cvu208. Epub 2014 Sep 11.

Lauden L, Boukouaci W, Borlado LR, López IP, Sepúlveda P, Tamouza R, Charron D, Al-Daccak R. Allogenicity of human cardiac stem/progenitor cells orchestrated by programmed death ligand 1. Circ Res. 2013 Feb 1;112(3):451-64. doi: 10.1161/CIRCRESAHA.112.276501. Epub 2012 Dec 12.

Starting date: June 2014
Last updated: July 30, 2015