A Safety and Tolerability Study of UBX0101 in Patients With Osteoarthritis of the Knee

This study is a phase 1, randomized, double-blind, placebo-controlled single ascending dose
study that will evaluate safety, tolerability, and pharmacokinetics of UBX0101 in patients
diagnosed with painful femoro-tibial osteoarthritis. The study consists of 2 parts: Part A is
a single ascending dose study, whereas Part B is a single-dose study at a dose that has been
determined to be safe and tolerable in Part A of the study.

In Part A, subjects will be randomly allocated to receive UBX0101 or placebo in 3:1
randomization by dose level (cohort), whereas in Part B subjects will be randomly allocated
to receive UBX0101 or placebo in a 2:1 randomization.

The primary objective is to establish the safety and tolerability of UBX0101 given as a
single intra-articular injection into the femoro-tibial joint of patients with
osteoarthritis.

Inclusion Criteria:

- Patients who have the capacity to give informed consent and who are willing to comply
with all study related procedures and assessments. Patients who do not have the legal
capacity or medical competency to give written informed consent are not eligible for
this study; consent via legally authorized representative will not be accepted

- Patients must be ≥ 40 and ≤ 85 years of age

- Patients using non-steroidal anti-inflammatory agent must be on a consistent regimen,
dose, and medication for at least 8 weeks prior to enrollment

- Part A only: Ambulatory persons with osteoarthritis (OA) of the knee and baseline pain
with a mean of ≥ 4 and ≤ 9 points on the 24-hour mean pain score (on the 11-point
Numeric Rating Scale) for at least five of the seven days during the screening period.

- Part B only: Ambulatory persons with painful osteoarthritis (OA) of the knee for at
least six months.

- Part B only: Patients with OA must have Kellgren-Lawrence scores 1 through 4 in the
target knee

- Part B only: Patients must have a baseline pain ≥6 on the WOMAC Index pain subscale as
derived from the KOOS.

Exclusion Criteria:

- Any condition, including laboratory findings and findings in the medical history or in
the pre-study assessments, that in the opinion of the Investigator constitutes a risk
or contraindication for participation in the study or that could interfere with the
study objectives, conduct or evaluation or prevent the Patient from fully
participating in all aspects of the study

- Patients with clinically significant co-existing conditions of the cardiovascular,
renal, gastrointestinal, respiratory, nervous, metabolic, or hematologic/ immune
systems

- Patients with a history of diabetes mellitus according to the American Diabetes
Association criteria or patients previously diagnosed by a qualified physician as
having diabetes (American Diabetes Association Standards of Medical Care in Diabetes
2016)

- Patients with a history of cardiac rhythm disturbances, abnormal ECG intervals, or use
of medications known to impact ECG intervals

- Patients who have undergone diagnostic arthroscopy of the Target Knee in the previous
six months

- Patients who have undergone arthroscopic surgery in the last two years prior to the
screening visit (including microfracture and menisectomy) on the Target Knee.

- Patients anticipated to have arthroscopic surgery on either knee at any time during
the study period

- History of previous total or partial knee arthroplasty in either knee

- Part A only: Patients with an effusion at the screening visit which, in the opinion of
the investigator following examination and discussions with the Patient, requires
drainage for symptom relief

- Patients who have received intra-articular treatment with steroids or hyaluronic acid
derivatives within the last 16 weeks prior to screening

- Patients who use, or have used in the 8 weeks prior to screening, opioid analgesics
(with exception of mild opioid analgesics)

- Patients who have had regenerative joint procedures on any joint including, but not
limited to, platelet-rich plasma injections, mesenchymal stem cell transplantation,
autologous chondrocyte transplantation, or mosaicplasty

- Current or history of other joint diseases such as joint dysplasia, crystal-induced
arthropathy (such as gout, or calcium pyrophosphate deposition disease evidenced by
clinical and/or radiographic means), aseptic osteonecrosis, acromegaly, Paget's
disease, Ehlers-Danlos Syndrome, Gaucher's disease, Stickler's syndrome, joint
infection, hemophilia, hemochromatosis, or neuropathic arthropathy of any cause

- Any active known or suspected systemic autoimmune disease (except for vitiligo,
residual auto-immune hypothyroidism only requiring hormone replacement, psoriasis not
requiring systemic treatment for two years, conditions not expected to recur in the
absence of an external trigger) or any history of a systemic inflammatory arthritis
such as psoriatic, rheumatoid, ankylosing spondylitis or reactive arthritis

- Patients diagnosed presently and symptomatic with fibromyalgia based on American
College of Radiology (ACR) Criteria

- Patients with a BMI ≥ 40 kg/m2, or whose size exceed the limits of the of the MRI
equipment (coil and gantry)