Elsevier

Osteoarthritis and Cartilage

Volume 23, Issue 12, December 2015, Pages 2109-2118
Osteoarthritis and Cartilage

Preliminary results of a phase II randomized study to determine the efficacy and safety of genetically engineered allogeneic human chondrocytes expressing TGF-β1 in patients with grade 3 chronic degenerative joint disease of the knee

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Summary

Objective

The aim of this study was to preliminarily evaluate the efficacy and outcomes of injectable genetically engineered chondrocytes virally transduced with TGF-β1 (GEC-TGF-β1) compared to placebo.

Design

A multi-center, double-blinded, placebo-controlled, randomized study of adults with knee osteoarthritis. A total of 102 patients were 2:1 randomized to GEC-TGF-β1 or placebo. Primary outcomes assessed were (1) function of the knee joint, scored using the International Knee Documentation Committee (IKDC); and (2) pain, measured by Visual Analog Scale (VAS). Secondary endpoints assessed were pain and analgesic use, quality of life (QOL), and adverse events (AEs) including need for total knee arthroplasty after treatment.

Results

IKDC showed significant improvement in the GEC-TGF-β1 group over the placebo at week 12 (least mean square difference (LSMD): 10.3; P = 0.0342), week 52 (LSMD: 13.6; P = 0.0082), and overall (LSMD: 8.6; P = 0.0453). VAS Analysis showed a significant improvement in GEC-TGF-β1 group compared to placebo at weeks 12 (LSMD: −13.8; P = 0.0162), 52 (LSMD: −13.1; P = 0.0332), and overall (LSMD: −10.1; P = 0.0350). Reduction in pain severity at week 12 and 52, frequency at 24 h and week 52, and the percentage of patients in the GEC-TGF-β1 group receiving analgesics at week 4 (27 vs 40%) and 12 (27 vs 37%) was observed.

Conclusions

GEC-TGF-β1 patients had more positive responses on the IKDC, VAS, and were less likely to require analgesics.

Trial Number: ClinicalTrials.gov (NCT01221441) – “Study of TG-C in Patients with Grade 3 Degenerative Joint Disease of the Knee”.

Keywords

Osteoarthritis
Knee
Pain
TissueGene
Genetically modified
Growth factors

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