Safety, Hemodynamic Effects and Efficacy of Intramuscular PDA-002 in Subjects Who Have Diabetic Foot Ulcer With Peripheral Arterial Disease

Inclusion Criteria:

1. Males and females, at least 18 years of age or older at the time of signing the
informed consent document.

2. Diabetes mellitus Type 1 or Type 2.

3. Diabetic foot ulcer with severity of Grade 1 (full thickness only) or Grade 2 on the
Wagner Grading Scale of greater than one month duration which has not adequately
responded to conventional ulcer therapy.

4. Subjects who meet one or more of the following criteria of arterial insufficiency in
the foot with the index ulcer:

1. Peripheral arterial disease with ABI ≥ 0.40 and ≤ 0.80 or TBI ≥0.30 and ≤ 0.65.

2. Transcutaneous oxygen measurement between 20 to 40 mmHg.

5. No planned revascularization or amputation over the next 3 months after screening
visit, in the opinion of the investigator.

6. Dosing should not begin until at least 14 days after a failed reperfusion intervention
and at least 30 days after a successful reperfusion intervention

Exclusion Criteria:

1. Any significant medical condition, laboratory abnormality, or psychiatric illness that
would prevent the subject from participating in the study, at the discretion of the
investigator.

2. Any condition including the presence of laboratory abnormalities, which places the
subject at unacceptable risk if he or she were to participate in the study, at the
discretion of the investigator.

3. Pregnant or lactating females.

4. Subjects with a body mass index > 40 mg/m2 at Screening.

5. Estimated glomerular filtration rate (eGFR) < 30 mL/min/1.73 m2 at Screening
calculated using the Modification of Diet in Renal Disease Study equation or history
of eGFR decline > 15 mL/min/1.73 m2 in the past year.

6. Untreated chronic infection or treatment of any infection with systemic
antibiotics,including the ulcer site. Subject must be antibiotic free within 1 week
prior to dosing with Investigational Product (IP).

7. Known osteomyelitis or infection or cellulitis at or adjacent to the index ulcer.

8. Limb pain at rest due to limb ischemia.

9. Uncontrolled hypertension (defined as diastolic blood pressure > 100 mmHg or systolic
blood pressure > 180 mmHg during Screening at 2 independent measurements taken while
subject is sitting and resting for at least 5 minutes).

10. Poorly controlled diabetes mellitus (hemoglobin A1c >12% or a screening serum glucose
of ≥ 300 mg/dL).

11. Untreated proliferative retinopathy.

12. History of malignant ventricular arrhythmia, Canadian Cardiovascular Society (CCS)
Class III-IV angina pectoris, myocardial infarction/PCI (percutaneous coronary
intervention)/CABG (coronary artery bypass graft) in the preceding 6 months prior to
signing the Informed Consent (ICF),pending coronary revascularization in the following
3 months, transient ischemic attack/cerebrovascular accident in the preceding 6
months, prior to signing the ICF and/or New York Heart Association [NYHA] Stage III or
IV congestive heart failure.

13. Abnormal ECG: new right bundle branch block (BBB) ≥ 120 msec in the preceding 3 months
prior to signing the ICF.

14. Uncontrolled hypercoagulation syndrome.

15. Life expectancy less than 2 years due to concomitant illnesses.

16. In the opinion of the investigator, the subject is unsuitable for cellular therapy.

17. History of malignancy within 5 years prior to signing the ICF except basal cell or
squamous cell carcinoma of the skin or remote history of cancer now considered cured
or positive Pap smear with subsequent negative follow-up.

18. History of hypersensitivity to any of the components of the product formulation
(including bovine or porcine products, dextran 40, and dimethyl sulfoxide [DMSO]).

19. Subject has received an investigational agent —an agent or device not approved by the
US Food and Drug Administration (FDA) for marketed use in any indication— within 90
days (or 5 half-lives, whichever is longer) prior to treatment with study therapy or
planned participation in another therapeutic study prior to the completion of this
study.

20. Subject has received previous investigational gene or cell therapy.