Arteriosclerosis Obliterans, Critical Limb Ischemia, Diabetic Angiopathies, Peripheral Arterial Disease, Thromboangiitis Obliterans
Conditions
Keywords
Critical lower limb ischemia, Atherosclerosis obliterans, Diabetic angiopathies, Thromboangiitis obliterans, Ischemic ulcers, Peripheral arterial disease, Indirect revascularisation, Intramuscular injection, Ankle-brachial index, Transcutaneous oxygen tension, Stromal vascular fraction (SVF), Adipose-derived regenerative cells (ADRC), Adipose tissue, Stem cells
Brief summary
Adipose-derived regenerative cells (ADRC) will be extracted from lipoaspirate by enzymatic digestion. 10 mL of autologous ADRC suspension injected intramuscularly, close to the site of muscle injury. All patients will receive cell therapy. This is a single arm study with no control.
Detailed description
Fat tissue obtainment: Subjects will undergo liposuction under local anesthesia. In this procedure, Ringer's solution with the anesthetic lidocaine and vasoconstrictor adrenaline infused into the adipose compartment to minimize blood loss and contamination of the tissue by peripheral blood cells. 15 minutes later a hollow blunt-tipped 3 mm cannula introduced into the subcutaneous space through small (0.5 cm) incision. The cannula attached to syringe and under gentle suction moved through the adipose compartment, mechanically disrupting the fat tissue. Aspirate volume - approximately 150-200 cc. Procedure time - 30 minutes. ADRC isolation: Harvested adipose tissue will be processed according to patent pending technology based on enzymatic digestion, washing and concentration of cell pellet in 10.5 ml of normal saline. Obtained ADRC divided into 2 portions. First portion (0.5 mL) used for counting, viability and sterility assessment. The second portion (10 ml) placed into sterile syringe for injection. Autologous ADRC administration 10 mL of autologous ADRC suspension will be injected intramuscularly, close to the site of muscle injury. 10 to 20 injections (0.5 to 1.0 mL each) will be performed so as to infiltrate the injured muscle.
Interventions
PROCEDUREADRC injection
10 mL of autologous ADRC suspension will be injected intramuscularly
OTHERADRC isolation
ADRC will be isolated according to patent pending technology based on enzymatic digestion, washing and concentration of cell pellet in 10 ml of normal saline.
PROCEDURELiposuction
Sponsors
Central Clinical Hospital w/Outpatient Health Center of Business Administration for the President of Russian Federation
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
50 Years to 85 Years
Healthy volunteers
No
Inclusion criteria
* Patients with critical lower limb ischemia, with resting pain wich can't be adequately managed by opioid analgetics and/or foot ulcers or necrosis, with II-4, III-5 и IV-6 stages of chronic arterial failure according to Rutherford's classification * Ankle-brachial index less than 0.4 and/or ТСрО2 less than 30 mm Hg * Patients with lower limbs' arteries lesions revealed by angiography uneffectiveness or impossibility of limb's revascularisation or patient's refusal of the procedure * Patient is familiar with Participant information sheet * Patient signed informed consent form Non-inclusion Criteria: * Contraindications for local anesthesia or history of allergy for local anesthetics * Systemic glucocorticoid and/or immunosuppressant therapy * Any condition that might limit compliance (dementia, mental disorders, narcotic drug or alcohol abuse etc.) * Participation in other clinical trials (or administration of investigational drugs) during 3 months prior inclusion * Patients with malignant tumors including postoperative period, patients receiving chemotherapy and/or radiotherapy * Clinically significant abnormalities in results of laboratory tests * Patient received anticoagulants at least 12 hours prior the liposuction * Medical history of heterotopic ossifications * Patients prescribed for glycoprotein inhibitors treatment
Exclusion criteria
* Patient's refusal from the further participation in trial * Chronic kidney disease IV- V stages (creatinine clearance \< 30 mL/min estimated by Cockcroft-Gault formula) * Confirmed syphilis, HIV, hepatitis B or C infections Dropout Criteria: * Indications for the amputation of the limb
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Serious adverse events | 4 weeks after injection of ADRC suspension | Frequency, type and severity of serious adverse events (SAE) |
| Serious adverse reactions | 4 weeks after injection of ADRC suspension | Frequency, type and severity of serious adverse reactions (SAR) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Changes of hemodynamics in lower extremity - 2 | Follow up to completion (24 weeks after intervention) | Influence of intervention on pulsatility index assessed by arterial duplex scanning. |
| Changes of hemodynamics in lower extremity - 3 | Follow up to completion (24 weeks after intervention) | Influence of intervention on resistance index assessed by arterial duplex scanning. |
| Changes of ankle-brachial index | Follow up to completion (24 weeks after intervention) | Influence of intervention on ankle-brachial index. |
| Quality of life monitoring - 1 | Follow up to completion (24 weeks after intervention) | Quality of life estimated by validated questionnaire: the Short Form (SF-36). |
| Quality of life monitoring - 2 | Follow up to completion (24 weeks after intervention) | Quality of life estimated by validated questionnaire:Peripheral Artery Questionnaire. |
| Metabolic state of targeted tissues measurements | Follow up to completion (24 weeks after intervention) | Changes of transcutaneous oxygen tension (ТсРО2) in injured limb assessed by transcutaneous oximetry. |
| Changes of hemodynamics in lower extremity - 1 | Follow up to completion (24 weeks after intervention) | Influence of intervention on blood flow velocity assessed by arterial duplex scanning. |
Countries
Russia
Outcome results
None listed