Please select the eligibility criteria that correspond to the clinical trial below.
Title: Allogeneic Mesenchymal Stromal Cells for Angiogenesis and Neovascularization in No-option Ischemic Limbs; A Double-blind, Randomized, Placebo-controlled Trial
Brief Summary: The primary objective of this trial is to investigate whether intramuscular administration of allogeneic mesenchymal stromal cells (MSC) is safe and potentially effective, assessed as a composite outcome of mortality, limb status, clinical status (Rutherford classification) and pain score (visual analogue scale), in patients with no-option severe limb ischemia (SLI).

The investigators will conduct a double-blind, placebo-controlled randomized clinical trial to investigate the effect of allogeneic bone marrow(BM)-derived MSC in patients with SLI, who are not eligible for conventional surgical or endovascular therapies. The investigators intend to include 60 patients, who will be randomized to undergo 30 intramuscular injections with either BM-MSC (30 injection sites with 5\*10\^6 MSCs each) or placebo in the lower leg of the ischemic extremity. Primary outcome i.e. therapy success, a composite outcome considering mortality, limb status, clinical status (Rutherford classification) and changes in pain score, will be assessed at six months.


Options:
A: Inclusion Criteria:

* Unilateral or bilateral lower extremity ischemia due to advanced peripheral arterial disease
* Unsuitable for revascularization
* Minor tissue loss (Rutherford Category 5) or ischemic rest pain (Rutherford Category 4)
* Competent to give consent
* No current malignancy or history of previous malignancy within the last five years, with the exception of adequately treated non-melanoma skin cancer (evidence of standard preventative cancer screenings required)

Exclusion Criteria:

* Major tissue loss (Rutherford Category 6)
* Diabetics with uncontrolled or untreated proliferative retinopathy
* Poorly controlled diabetes mellitus with HbA1C \> 10%
* Uncompensated congestive heart failure and/or other conditions that preclude general anesthesia
* Myocardial infarction or stroke within last 90 days
* Elevated liver function tests (AST or ALT more than twice the upper limit of normal)
* Renal disease (creatinine \> 2.5 mg/dl) or chronic hemodialysis
* White blood cell count \< 3,000/µL or \> 15,000/µL, platelet count \< 100,000/µL, or hematocrit \< 32%
* Topical growth hormone therapy within last 90 days, or injected growth hormone therapy within last 180 days
* Disease of central nervous system and/or other conditions that impair cognitive function
* Two or more episodes of pulmonary embolus with a documented DVT in index leg or history of DVT in index leg without evidence of clot resolution
* Current infection of index leg
* Pregnant women (negative urine pregnancy test required)
* Lower extremity venous disease with pitting edema in index leg
* Recent history (in the 6 months prior to screening) of bone marrow disease or treatment with any medication or procedure which adversely affects the bone marrow and would prohibit transplantation
* Current osteomyelitis in index leg
* Existing HIV diagnosis
* Organ transplant recipients
* Known terminal disease process with life expectancy less than one year
* Severe concomitant disease(s) or any additional condition(s) which the investigator feels constitute(s) criteria for exclusion of a particular subject
* Major amputation required within 30 days
* Inclusion in any other clinical study that may affect the outcome of this study
* Uncorrected stenosis(es) of greater than 50% in the common and/or external iliac artery and/or common femoral artery of the index leg.
B: Inclusion Criteria:

* Patients 18 years of age or greater with atherosclerotic vascular disease that is viewed as not readily amenable to reconstructive surgery and Rutherford Category 4 ischemia (ischemic rest pain) and Rutherford Category 5 ischemia (ulceration or tissue necrosis) and by the judgment of their referring physician are not reasonable candidates for revascularization options of either percutaneous balloon angioplasty or a surgical revascularization.
* Objective evidence of severe peripheral arterial disease will include an ankle brachial index (ABI) of less than 0.5, or, in the case of patients who have vessels calcified and thereby "non-compressible" vessels metatarsal pulse volume recording (PVR) that is flat or barely pulsatile in the diseased limb on two consecutive examinations performed at least one week apart.
* Patients competent to give informed consent.
* No active malignant disease that could involve the bone marrow, or history of treatment of malignant disease that could have damaged the bone marrow.
* Before being accepted for the study the patient must be screened for human immunodeficiency virus, hepatitis B virus, hepatitis C virus, human transmissible spongiform encephalopathy, including Creutzfeldt-Jacob Disease, Treponema pallidum, and have a negative standard infectious disease panel including a CMV PCR test.
* Patients who are hemodynamically stable.

Exclusion Criteria:

* Patients with poorly controlled diabetes mellitus (HbA1C \> 8%)
* Patients with renal insufficiency (creatinine \> 2.5).
* Patients with evidence of infectious disease as determined by e. above or other medical findings.
* Pregnant women (women capable of childbearing must have a negative pregnancy test).
* Patients with cognitive impairments.
* Other comorbid disease that would be expected to result in less than one year life expectancy
* Past malignancy or history of chemotherapy or radiation affecting the bone marrow.
* History of inflammatory or progressively fibrotic conditions: .e.g., rheumatoid arthritis, systemic lupus erythematosis, vasculitic disorders, idiopathic pulmonary fibrosis, retroperitoneal fibrosis
* Infection as evidenced by WBC count of \>15,000 and/or temperature \>38 degrees C. Large area of cellulitis in the afflicted limb that in the opinion of the investigators would require the institution of antibiotics OR evidence of osteomyelitis corroborated by radiographic or scintigraphic examination
* Cardiovascular conditions:

  * Exercise limiting angina ( Canadian Cardiovascular Society Class 3 (Appendix 7);
  * Congestive heart failure (New York Heart Association class 3 (Appendix 5);
  * Unstable angina;
  * Acute ST elevation myocardial infarction (MI) within 1month;
  * Transient ischemic attack or stroke within 1 month;
  * Severe valvular disease
* Patients with any history of organ transplants;
C: Inclusion Criteria:

* Males or females with non-child bearing potential in the age group of 18-60 yrs of Indian origin.
* Established CLI, clinically and hemodynamically confirmed as per Rutherford- II-4, III-5, or III-6; Patients having Infra-inguinal arterial occlusive disease with rest pain or ischemic ulcer/necrosis, who are not eligible for or have failed traditional revascularization treatment (No option patients)
* Ankle Brachial Pressure Index (ABPI) ≤ 0.6 or ankle pressure ≤ 70 mm Hg or TcPO2 ≤ 60 mmHg in the foot
* Patients if having associated Type II Diabetes, should be on medication and well controlled (HbA1c ≤ 8%) without complications
* Patients who are able to understand the requirements of the study, and willing to provide voluntary written informed consent, abide by the study requirements, and agree to return for required follow-up visits
* Normal liver and renal function
* On regular medication for hypertension if any

Exclusion Criteria:

* Patients with CLI suitable for surgical or percutaneous revascularization as determined by the surgeon performing vascular procedure and patients with any acute/chronic inflammatory condition
* CLI patient requiring amputation proximal to trans-metatarsal level
* Patients with gait disturbance for reasons other than CLI.
* Type I diabetes
* Patients having respiratory complications/left ventricular ejection fraction \< 25%f) Stroke or myocardial infarction within last 3 months
* Patients who are contraindicated for MRA
* Have clinically serious and/or unstable inter-current infection, medical illnesses or conditions that are uncontrolled or whose control, in the opinion of the Investigator, may be jeopardized by participation in this study or by the complications of this therapy
* Documented terminal illness or cancer or any concomitant disease process with a life expectancy of less than 1 year
* Patients already enrolled in another investigational drug trial or completed within 3 months.
* History of severe alcohol or drug abuse within 3 months of screening.
* Hb% \< 10 gm%, Serum Creatinine ≥ 2mg%, Serum Total Bilirubin ≥2mg%, HbA1c \> 8%
* Women with child bearing potential, pregnant and lactating women.
* Patients tested positive for HIV 1, HCV, HBV,
D: Inclusion Criteria:

* Age \> 18 years
* Severe Peripheral Artery Disease (PAD; Fontaine class III and / or IV):

  * Fontaine III (Rutherford 4): persistent, recurring rest pain requiring analgesia
  * Fontaine IV (Rutherford 5): non-healing ulcers present for \> 4 weeks without evidence of improvement in response to conventional therapies
* Ankle brachial index \< 0.6 or unreliable (non-compressible or not in proportion to the Fontaine classification)
* Not eligible for surgical or endovascular revascularization
* Written informed consent.

Exclusion Criteria:

* History of neoplasm or malignancy in the past 10 years
* Serious known concomitant disease with life expectancy of less than one year
* Rutherford 6 in which amputation on the short term (within 1-2 weeks) is inevitable
* Pregnancy or unwillingness to use adequate contraception during study
* Uncontrolled acute or chronic infection with systemic symptoms
* Follow-up impossible.

Answer: D