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A Biologically Lubricating Allicin-Based Nanoplatform for Remodeling the Inflammation-Senescence Axis in the Treatment of Periodontitis
Periodontitis is driven by a self-reinforcing cycle of persistent inflammation and cellular senescence, further exacerbated by pathogenic microbial colonization. To address this challenge, inspired by the “fortress effect”, we report an allicin-based nanoplatform of biolubrication (PPCG) that establishes a physical and biological protective barrier for precise modulation of the periodontal microenvironment. PPCG integrates hydration-lubricating diblock copolymer P(DMA-bMPC) (PDMPC) with bioactive allicin. The lubricating PDMPC barrier may suppress pathogenic microbial adhesion and biofilm formation, constituting an “outer fortress wall” against bacterial invasion. Concurrently, sustained release of allicin could regulate bone marrow mesenchymal stem cells (BMMSCs) and mitigate inflammatory responses. It could preserve stemness and multipotent differentiation potential, thereby forming an “inner defensive citadel” that promotes soft and hard tissue regeneration. This dual protective barrier can markedly attenuate periodontal tissue senescence and inflammatory and prevent alveolar bone loss in mice periodontitis model. Furthermore, PPCG could rebalance the oral microbiota and maintain ecological homeostasis. Therapeutic efficacy is also corroborated using an artificial intelligence-assisted detection system based on the YOLO v8 deep learning model. Collectively, this study presents a therapeutic intervention strategy for periodontitis, offering a scalable and translational approach for treating inflammation and senescence.
Probing the proton exchange kinetics of BaZr0.1Ce0.7Y0.1Yb0.1O3−δ ceramic electrolyte by operando diffuse reflectance infrared Fourier transform spectroscopy
Proton exchange kinetics plays an important role in governing the performance of intermediate-temperature protonic ceramic electrolysis cells (PCECs) for hydrogen production. Our understanding of the nature of the surface hydration reaction at the single-cell level, however, remains very limited, hampering further efficiency improvements. Here, we developed a custom operando diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) platform that operates under high temperature and steam conditions with applied bias. Quantitative investigations of surface H2O/D2O isotope exchange in a BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb1711) protonic electrolyte-based single cell were conducted under different applied voltages using this DRIFTS platform, to gain molecular-level insight into hydration kinetics. The findings show that the application of an external voltage significantly enhances the surface proton exchange rate, decreasing the apparent activation energy from 29.1 kJ mol−1 at open-circuit voltage (OCV) to 6.8 kJ mol−1 at 1.3 V. In addition, distinct voltage-induced spectral shifts in O–D vibrations point to dynamic changes in surface hydration. These findings demonstrate a sensitive spectroscopic platform for probing interfacial proton processes and reveal strong electrochemical control over surface proton kinetics, offering new opportunities for probing electrolyte hydration behavior in PCECs.
海洋学研究
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