Comparison of human mesenchymal stem cells derived from adipose tissue and bone marrow for ex vivo gene therapy in rat spinal fusion model.

Several human studies show positive signals, while research methods and sample sizes continue to develop.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Rat spinal fusion model. To compare the efficacy of human adipose tissue-derived mesenchymal stem cells (HATDMSCs) and human bone marrow-derived mesenchymal stem cells (HBMDMSCs) transduced with an adenovirus containing the cDNA for bone morphogenetic proteins (BMP)-2 for inducing spinal fusion in an athymic rat model. Recombinant BMPs have successfully induced spinal fusion in clinical trials. However, large doses are required for adequate bone repair. Regional gene therapy may deliver proteins to specific anatomic sites more efficiently. Gene transfer techniques using HATDMSCs have recently been tested. Spinal fusion was performed in rats with different treatments: Group I (n = 10) collagen sponge containing HATDMSCs transfected with adeno-BMP-2, Group II (n = 10) collagen sponge containing HBMDMSCs transfected with adeno-BMP-2, Group III (n = 10) collagen sponge containing recombinant BMP-2 (10 mug), Group IV (n = 6) collagen sponge containing HATDMSCs transfected with adeno-LacZ, Group V (n = 6) collagen sponge containing HBMDMSCs transfected with adeno-LacZ, and Group VI (n = 6) collagen sponge alone. Radiographs were obtained at 4, 6, and 8 weeks. After sacrifice, the rat spines were assessed by manual palpation, microcomputed tomography, and histologic analysis. At 8 weeks, spinal fusion was observed in all Groups I, II, and III rats. 75% (15 of 20) of the gene therapy t

Evidence level

Several human studies show positive signals, while research methods and sample sizes continue to develop.

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