SM04690-DDD-01 is a Phase 1, open-label, dose escalation study. SM04690 Injectable Suspension will be administered via a single intradiscal injection to subjects with degenerative disc disease (DDD) under fluoroscopic guidance. Groups of 6 subjects will be enrolled in successive cohorts. Subjects will participate in a 6 month follow-up period. Clinic visits will be Screening, Treatment Visit Day 1, and Follow-up Visit Days 2, 15, 28, 60, 90, 135, and 180.