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- W2475107964 abstract "Introduction: New biotechnologies create opportunities for gene therapy to promote rotator cuff healing. We have previously demonstrated that genetically engineered mesenchymal stem cells (MSCs) over expressing BMP-2 and SMAD8 signaling molecule differentiate to tenocytes in vitro and in vivo. Therefore, we hypothesized that rotator cuff defect could be regenerated using genetically engineered MSCs. Method: Nonviral methods were utilized to establish genetically engineered MSCs that co-express BMP-2 and the Smad8 signaling molecule. A previously validated animal model was utilized to examine rotator cuff healing. A 2mm x2mm full thickness defect was created in the infraspinatus tendon of 8 nude rats. A collagen-I biomembrane (TissueMend) containing 3 x 10 6 engineered cells was sewn into the defect. An identical control procedure was repeated on the contralateral side with biomembrane containing non-engineered MSCs. Results: 4 weeks post implantation the area of implantation was isolated and analyzed by light microscopy and histochemical staining. Analysis of the engineered implants revealed the formation of dense connective tissue with parallel-organized fibers and spindle shaped cells, unlike the control samples. Proton Double Quantum Filtered Magnetic Resonance Imaging technique of the rotator cuff tendons demonstrated an increased presence of organized collagen fibers within the engineered rotator cuff tissue when compared with either native rotator cuff or those treated with non-engineered MSCs. Conclusion: This is the first report showing rotator cuff tendon repair using genetically engineered MSCs. Moreover these findings may have considerable importance for tendon healing and may indicate a clinical gene therapy platform to augment surgical repair." @default.
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- W2475107964 date "2005-09-01" @default.
- W2475107964 modified "2023-09-26" @default.
- W2475107964 title "CELL-MEDIATED GENE THERAPY FOR ROTATOR TENDON REPAIR" @default.
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