First-In-Human Study of AK1320 Encapsulated Microspheres (AK1320 MS)

First-In-Human Study of AK1320 Encapsulated Microspheres (AK1320 MS) In Subjects With Degenerative Spondylolisthesis and Concomitant Symptomatic Spinal Stenosis Who Are Undergoing Decompression And Single Level Instrumented Posterolateral Lumbar Autograft Fusion Surgery

The safety and efficacy of AK1320 MS will be evaluated in patients with degenerative spondylolisthesis and concomitant symptomatic spinal stenosis who are undergoing decompression and single level instrumented posterolateral lumber autograft fusion surgery.

This will be a first in human Phase I, ascending dose, multi-center, randomized patient study evaluating the efficacy, safety, PK of AK1320 MS. The study will enroll up to 4 dose escalating cohorts with each cohort having 2 treatment groups. Cohort 1 and Cohort 2 (AK1320 MS group (n=3-7); Control group (n=0-3)) and Cohort 3 and Cohort 4 (AK1320 MS group (n=6-7); Control group (n=0-3)).

Inclusion Criteria:

1. Involved level L1 to S1
2. Use of local autologous bone only.
3. Degenerative spondylolisthesis up to Meyerding's Classification Grade 1 or 2.
4. Moderate or higher disability as assessed by Oswestry Disability Index.
5. Neurogenic claudication and/or radiculopathy with or without back pain.
6. Male or female over 22 years of age and less than 81 years of age.

Exclusion Criteria:

1. Prior lumbar decompression or spine fusion attempt (any level).
2. Undergoing concurrent interbody fusion.
3. Requires spinal fusion at more than one lumbar level.
4. Degenerative scoliosis.
5. BMI > 40.
6. Radiographically confirmed significant spinal instability.
7. Active or recent (within the past two (2) years) worker's compensation litigation.