期刊
BIOMEDICINES
卷 9, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/biomedicines9020160
关键词
gene-activated scaffold; SDF-1 alpha; human diabetic ADSCs; angiogenesis; wound healing
资金
- RCSI Dilmun Ph.D. scholarship
The study showed that the SDF-1 alpha gene-activated scaffold can enhance the regenerative functionality of diabetic ADSCs, restoring a pro-angiogenic response similar to healthy ADSCs. Gene and protein expression analysis revealed overexpression of SDF-1 alpha in diabetic ADSCs and activation of downstream beta-arrestin signaling, as effectively as in healthy ADSCs.
Non-healing diabetic foot ulcers (DFUs) can lead to leg amputation in diabetic patients. Autologous stem cell therapy holds some potential to solve this problem; however, diabetic stem cells are relatively dysfunctional and restrictive in their wound healing abilities. This study sought to explore if a novel collagen-chondroitin sulfate (coll-CS) scaffold, functionalized with polyplex nanoparticles carrying the gene encoding for stromal-derived factor-1 alpha (SDF-1 alpha gene-activated scaffold), can enhance the regenerative functionality of human diabetic adipose-derived stem cells (ADSCs). We assessed the impact of the gene-activated scaffold on diabetic ADSCs by comparing their response against healthy ADSCs cultured on a gene-free scaffold over two weeks. Overall, we found that the gene-activated scaffold could restore the pro-angiogenic regenerative response in the human diabetic ADSCs similar to the healthy ADSCs on the gene-free scaffold. Gene and protein expression analysis revealed that the gene-activated scaffold induced the overexpression of SDF-1 alpha in diabetic ADSCs and engaged the receptor CXCR7, causing downstream beta-arrestin signaling, as effectively as the transfected healthy ADSCs. The transfected diabetic ADSCs also exhibited pro-wound healing features characterized by active matrix remodeling of the provisional fibronectin matrix and basement membrane protein collagen IV. The gene-activated scaffold also induced a controlled pro-healing response in the healthy ADSCs by disabling early developmental factors signaling while promoting the expression of tissue remodeling components. Conclusively, we show that the SDF-1 alpha gene-activated scaffold can overcome the deficiencies associated with diabetic ADSCs, paving the way for autologous stem cell therapies combined with novel biomaterials to treat DFUs.
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