SINGaporean Program Performed With an eXPANsion Medical Device (SingXpand)

NCT ID: NCT04198883

Last Updated: 2022-06-10

Basic Information

• Recruitment Status: WITHDRAWN
• Clinical Phase: PHASE1/PHASE2
• Study Classification: INTERVENTIONAL
• Study Start Date: 2018-11-27
• Study Completion Date: 2021-07-31

Brief Summary

The purpose of the pilot study is to evaluate the safety and the individual efficacy of the use of ProtheraCytes® in patients with acute myocardial infarction and decreased ejection fraction. CD34+ cells will be re-injected using a dedicated catheter pushed through the femoral artery up to the left ventricle, thus avoiding open chest surgery.

Detailed Description

Primary Objective : The objective is to establish the safety of the interventional procedure beginning at the first G-CSF administration to 6 months after the injection of autologous expanded CD34+ stem cells (ProtheraCytes®) in AMI patients with a LVEF≤45% after PTCA and stent(s) implantation.

Secondary Objective : The objective is to establish the individual efficacy of the interventional procedure beginning at the first G-CSF administration to 6 months after the injection of autologous expanded CD34+ stem cells (ProtheraCytes®) in AMI patients with a LVEF≤45% after PTCA and stent(s) implantation.

Conditions

Heart Attack

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Protheracytes

Single arm study : Stem cells injection called Protheracytes

Group Type: EXPERIMENTAL

Protheracytes

Intervention Type: COMBINATION_PRODUCT

Intramyocardiac (LV) injection of stem cells with a dedicated catheter

Interventions

Protheracytes

Intramyocardiac (LV) injection of stem cells with a dedicated catheter

Intervention Type: COMBINATION_PRODUCT

Other Intervention Names

Biocardia Helix catheter

Eligibility Criteria

Inclusion Criteria

1. De Novo AMI with or without ST segment elevation and with a detection of rise and/or fall of cardiac biomarker values (troponin) with at least one value above the 99th percentile of the upper reference limit.

2. Anterior wall AMI

3. PTCA and stent(s) implantation (=Day 0)

4. LVEF ≤ 45% after stent(s) implantation: Combination of a LVEF ≤ 45 % and of anterior akinetic segment(s) - by echography at Day 2 ± 1 after stent(s) implantations

5. Age must be ≥ 21 and ≤ 80 years

6. Men and Non-pregnant non-lactating women who take efficacious contraceptive measures such as oral contraceptive medications or efficacious and permanent intra-uterine device (drug eluted or not) (IUD) or subcutaneous permanent contraceptive implants or menopaused women (at least a 2 years confirmed menopause) or surgically sterilized women.

7. Having previously signed a written informed consent prior to any study-specific procedures.

8. LVEF remaining ≤ 45% assessed by a 2nd echography at Day 8 (± 2) after stent(s) implantation.

If these criteria have been validated, then the following assessments will be carried out only after the 2nd echography

9. LVEF remaining ≤ 45% assessed by cMRI

10. Identification of anterior akinetic segment(s) of interest assessed by cMRI

11. Identification of non-viability of anterior segment(s) of interest assessed by cMRI

Exclusion Criteria

1. Previous and known symptomatic CHF, from class II to IV (included)

2. History of CABG (Coronary Artery Bypass Surgery) surgery

3. History of former significant mitral valve replacement surgery or heart transplantation.

4. Severe valve disease: mitral, aortic stenosis / insufficiency.

5. Diagnosis of non-ischemic dilated cardiomyopathy due to valvular dysfunction, mitral regurgitation, tachycardia, or myocarditis

6. Aortic stenosis as determined as valve area less than 1 cm2 that prohibits catheter access to LV

7. Presence of a prosthetic / mechanical aortic or mitral valve or heart constrictive device.

8. Documented presence of a known LV thrombus

9. Sepsis

10. Endocarditis

11. Infectious pericarditis

12. Pericardial tamponade

13. Left ventricular aneurysm, collagen tissue disease

14. Severe peripheral vascular disease precluding femoral artery access as determined at the time of original catheterization.

15. Pacemaker, implantable cardiac defibrillator, and intra-cerebral aneurysm clips.

16. History of metallic foreign body in their eye

17. Former or current aortic dissection

18. Inadequate bone marrow function: Haemoglobin < 10 g/dL and Platelet count < 100 x 109 / L

19. Previous G-CSF or other Hematopoietic Growth Factor administrations.

20. Blood transfusion(s) within the previous 4 weeks (to exclude potential non-autologous ACPs (Angiogenic Cells Precursors) in the harvested blood).

21. Hepatic failure or history of liver cirrhosis or hepatic severe impairment.

22. Constitutional or acquired coagulopathy

23. Treated chronic renal failure, or haemodialysis or renal severe impairment (creatinine clearance < 30ml/min).

24. Prior or concomitant malignancies except non-melanoma skin cancer or adequately treated in situ cervical cancer or previous cancer in complete response without any treatment in the last 5 years.

25. History of prior mediastinal radiation exposure

26. Serious underlying medical conditions at the investigator's discretion, which could impair the ability of the patient to participate in the trial (e.g. ongoing infection, active autoimmune disease, Amyotrophic Lateral Sclerosis, Systemic Lupus, Multiple Sclerosis).

27. Chronic immunomodulatory or cytotoxic drug treatment intake.

28. Active bleeding or major surgery within 1 month.

29. Human immunodeficiency HIV1-2, HTLV1, HTLV2

30. History or current Hepatitis B (prior vaccination accepted)

31. History or current Hepatitis C

32. Syphilis

33. Chronic Obstructive Pulmonary Disease.

34. Active participation in any other clinical trials

35. Current or recent treatment (within the 60 days period before PTCA and stent(s) implantation) with another investigational drug or procedure.

36. Any other co-existing conditions that will preclude participation in the study or compromise ability to give informed consent.

37. Requirement of i.v. catecholamines or mechanical hemodynamic support (aortic balloon pump) initiated 24 hours before cMRI.

38. Splenomegaly

39. Phenylketonuria

40. History of iron-Dextran allergy

41. History of murin protein allergy

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 75 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

CellProthera

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Frederic Flandrin

Role: STUDY_DIRECTOR

CellProthera

Locations

NHCS

Singapore, , Singapore

Countries

Singapore

Other Identifiers

CellProthera

Identifier Type: -

Identifier Source: org_study_id