Acceleration of articular cartilage repair by combined gene transfer of human insulin-like growth factor I and fibroblast growth factor-2 in vivo

作者：Madry Henning^*; Orth Patrick; Kaul Gunter; Zurakowski David; Menger Michael D; Kohn Dieter; Cucchiarini Magali

来源：Archives of Orthopaedic and Trauma Surgery, 2010, 130(10): 1311-1322.

DOI：10.1007/s00402-010-1130-3

• Cartilage defects
• IGF-I
• FGF-2
• NIH 3T3 fibroblasts
• Transplantation

Introduction Improving the biochemical and structural qualities of the new tissue that fills deep osteochondral defects is critical to enhance articular cartilage repair. We developed a novel molecular therapy to increase articular cartilage repair based on a combined strategy to stimulate chondrogenesis by co-transfection of the human insulin-like growth factor I (IGF-I) and fibroblast growth factor 2 (FGF-2) in a xenogenic transplantation model.
Materials and methods NIH 3T3 cells were transfected with expression plasmid vectors containing a cDNA for the E. coli lacZ gene (lacZ implants), the human IGF-I gene (IGF-I implants) or both the human IGF-I and FGF-2 genes (IGF-I/FGF-2 implants). The expression patterns of the transgenes were monitored in vitro for 21 days. LacZ, IGF-I and IGF-I/FGF-2 implants were transplanted into osteochondral defects in the trochlear groove of rabbits. At 3 weeks, the quality of articular cartilage repair was evaluated qualitatively and quantitatively.
Results Both IGF-I and IGF-I/FGF-2 implants secreted increased levels of the corresponding recombinant proteins in vitro. In vivo, transplantation of the co-transfected IGF-I/FGF-2 implants increased the DNA content of the repair tissue, accelerated the formation of the subchondral bone and improved articular cartilage repair in a magnitude that was larger than with IGF-I alone or when compared to lacZ implants.
Conclusion These results suggest that gene delivery of a combination of IGF-I and FGF-2 to cartilage defects may be more beneficial than application of IGF-I alone.

• 出版日期2010-10