Non-invasive electrical stimulation enhances the diabetic
osseointegration via alleviating mitochondrial damage
Abstract
A high-glucose environment induces imbalance of mitochondrial
homeostasis, and further result in the decreased autophagic capacity and
energy metabolism of mitochondria. This mitochondrial dysfunction
inhibits the regeneration of bone tissue. Electrical stimulation (ES) is
an efficient strategy to rebalance the mitochondrial homeostasis to
further accelerate the bone regeneration process. However, traditional
ES strategies are invasive and easily cause secondary trauma, limiting
its medical application. Here, we designed a new non-invasive
direct-current electric field (DCEF) strategy. This strategy can provide
ES in situ without implantation. Results show that this strategy can
target and regulate mitochondrial homeostasis through the PI3K-AKT
signaling pathway, activating mitochondrial autophagy, alleviate
high-glucose-induced mitochondrial damage, and further promote
osteogenic differentiation of bone marrow mesenchymal stem cells
(BMSCs). Consequently, this exogenous non-invasive ES strategy can
effectively accelerate the repair of bone defects in a high-glucose
environment through alleviating mitochondrial damage.