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Failure to mobilize adequate CD34+ stem cells for minimum study treatment dose.
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Peripheral artery disease (PAD) due to leg artery blockages can result in painful leg muscles, skin ulcers and infection due to poor blood flow. In severe forms, the only treatment may be amputation. Adult stem cells injected into affected legs may cause new blood vessel formation and improve blood flow. The purpose of this study is to determine the feasibility and safety of injecting adult stem cells into the leg muscles of patients with severe PAD, in an attempt to improve blood flow.
Lower extremity peripheral artery disease (PAD) is a common, debilitating and potentially life-threatening illness. Obstructive PAD can progress to limb-threatening ischemia with rest pain, ulcers, and gangrene requiring amputation unless blood flow to the ischemic limb can be restored. Surgical revascularization options are often limited by arteries that are too small to bypass. Patient co-morbidities also make surgical options risky. Percutaneous revascularization techniques are similarly limited by small distal artery caliber, technical difficulty and high restenosis rates. Amputation may be the only treatment option for non-healing ulcers or gangrene. Direct intramuscular injection of adult stem cells may result in improved lower extremity perfusion, symptomatic improvement and limb salvage in patients with critical limb ischemia not optimal for conventional revascularization. This study aims to demonstrate the safety and feasibility of this therapeutic approach.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Autologous Stem cells (CD133+) | Active Comparator | Intramuscular injection |
|
| Control | Placebo Comparator | Intramuscular Injection |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| autologous CD133+ cells | Biological | Intramuscular injection |
|
| Measure | Description | Time Frame |
|---|---|---|
| Death or amputation | 6 months |
| Measure | Description | Time Frame |
|---|---|---|
| Vascular hemodynamics and function | 6 months |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Amish N Raval, MD | U.Wisconsin School of Medicine and Public Health | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Wisconsin Hospital and Clinics | Madison | Wisconsin | 53792 | United States |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 25239491 | Result | Raval AN, Schmuck EG, Tefera G, Leitzke C, Ark CV, Hei D, Centanni JM, de Silva R, Koch J, Chappell RG, Hematti P. Bilateral administration of autologous CD133+ cells in ambulatory patients with refractory critical limb ischemia: lessons learned from a pilot randomized, double-blind, placebo-controlled trial. Cytotherapy. 2014 Dec;16(12):1720-32. doi: 10.1016/j.jcyt.2014.07.011. Epub 2014 Sep 18. | |
| 35802393 |
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| ID | Term |
|---|---|
| D000089802 | Chronic Limb-Threatening Ischemia |
| D001157 | Arterial Occlusive Diseases |
| D014652 | Vascular Diseases |
| ID | Term |
|---|---|
| D058729 | Peripheral Arterial Disease |
| D050197 | Atherosclerosis |
| D001161 | Arteriosclerosis |
| D002318 | Cardiovascular Diseases |
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| Derived |
| Moazzami B, Mohammadpour Z, Zabala ZE, Farokhi E, Roohi A, Dolmatova E, Moazzami K. Local intramuscular transplantation of autologous bone marrow mononuclear cells for critical lower limb ischaemia. Cochrane Database Syst Rev. 2022 Jul 8;7(7):CD008347. doi: 10.1002/14651858.CD008347.pub4. |
| D016491 |
| Peripheral Vascular Diseases |
| D002908 | Chronic Disease |
| D020969 | Disease Attributes |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D007511 | Ischemia |