The study is being conducted to investigate the safety and activity of TissueGene-C injected into the knee joint of patients with chronic degenerative joint disease (DJD) who will be undergoing total knee replacement.

The purpose of this first human study is to investigate the safety and biological activity of intra-articularly applied TissueGene-C in patients with chronic degenerative joint disease (DJD) who will be undergoing total knee replacement. In addition, data on joint pain, range of motion, and functionality will be obtained in this patient population prior to total knee replacement.

The primary objective of this study is to evaluate the safety and biological activity of intra-articularly administered TissueGene-C as evidenced by observation of the injection site for irritation or other abnormalities affecting the incidence and severity of adverse events, and the changes in physical examination findings and laboratory tests as compared to the placebo control.

The secondary objectives of this study are to:

1. Evaluate the dose response of the hChonJb#7 cells in grafting at the defect as compared to the placebo control.
2. Evaluate distribution of hChonJb#7 cells out of the injection site.
3. Evaluate the regeneration of hyaline cartilage as determined by the histological analysis of the resected knee tissue.
4. Evaluate the joint for evidence of tissue overgrowth or transformation.
5. Evaluate the biological activity of TissueGene-C on joint pain, range of motion and functionality as compared to the placebo control

Inclusion Criteria:

1. Male or Female subjects
2. Age 18 years and older
3. In general good health as evidenced by physical examination, normal hematology, serum chemistry, and urinalysis screening laboratory results, and a negative history of significant organ system disorders. All laboratory values must be within 20% of normal ranges.
4. Patients with Degenerative Joint Disease (DJD) of the knee that is refractory to existing drug therapies and who are scheduled for Total Knee Arthroplasty.
5. Based on Radiographic findings, defect should be more than 2 cm.
6. Patients providing written informed consent, after the nature of the study, are fully explained.
7. Body Mass Index (BMI) should be between '18.5 - 45.5'. The applied scale is the same for both men and women.
8. Blood Pressure measurements - Systolic Blood Pressure (SBP) should be between 90-160mm. Hg, and Diastolic Blood Pressure (DBP) between 50-90mm.Hg,
9. Osteoarthritis confirmed by the Radiographic Criteria of Kellgren and Lawrence
10. Symptom of pain for more than four (4) consecutive months and intensity greater than Grade 4 on the 11-point numeric scale.

Exclusion Criteria:

1. Patients with abnormal hematology, serum chemistry, or urinalysis screening laboratory results
2. Patients taking anti-inflammatory medications (prescription or over-the-counter), including herbal therapies, within 14 days of baseline visit
3. Patients with a recent (within 1 year) history of drug abuse and/or a positive urine drug/alcohol test at the time of screening
4. Patients receiving injections to the treated knee within 2 months prior to study entry
5. Patients who are pregnant or currently breast-feeding children
6. Patients with systemic, rheumatic, or inflammatory disease of the knee or chondrocalcinosis, hemochromatosis, inflammatory arthritis, necrosis of the femoral condyle, arthropathy of the knee associated with juxta-articular Paget's disease of the femur or tibia, ochronosis, hemophilic arthropathy, infectious arthritis, Charcot's knee joint, villonodular synovitis, and synovial chondromatosis.
7. Patients with ongoing infectious disease, including HIV and hepatitis
8. Patients with clinically significant cardiovascular, renal, hepatic, endocrine disease, cancer, or Type I diabetes
9. Patients participating in a study of an experimental drug or medical device within 30 days of study entry.
10. Positive drug screen at screening visit

Adults 18 or older with degenerative joint disease of the knee (confirmed by Kellgren and Lawrence criteria) refractory to existing drug therapies who were scheduled for total knee arthroplasty.

1 Year

Treatment emergent adverse events

This study was designed a a preliminary assessment of safety in a limited population (12 subjects: 9 active 3 placebo) therefore statistics are presented descriptively.