Closed-Loop Synergistic Nitric Oxide/Hydrogen Delivery with Feedback Control for Diabetic Wound Healing
Corresponding Author: Zhi Yang
Nano-Micro Letters,
Vol. 18 (2026), Article Number: 385
Abstract
Dynamic treatment represents the cornerstone of precision medicine. However, the development of closed-loop systems that respond to endogenous biomarkers remains challenging. Here, we report a dual-channel flexible electrocatalytic system (Pd-Ni5P4/DCEFS) integrated into a microneedle array that enables ultrasensitive real-time monitoring of nitric oxide (NO)—a key biomarker of wound inflammation—with a detection limit of 9.6 nM, while simultaneously driving the hydrogen evolution reaction with a low overpotential of − 91.0 mV at − 10 mA cm−2. This integrated platform establishes a closed-loop sensing-feedback-intervention mechanism, enabling NO-guided on-demand hydrogen generation for precision anti-inflammatory treatment. In diabetic mouse skin wound models, this adaptive hydrogen production strategy markedly suppresses inflammation, promotes tissue regeneration, achieves substantial wound closure within 5 days, and reduces the overall healing time to 11 days. This study establishes a new paradigm for closed-loop dynamic treatment of inflammatory diseases and provides a critical foundation for next-generation self-adaptive therapeutic platforms in regenerative medicine.
Highlights:
1 Pd-Ni5P4/dual-channel electrocatalytic flexible system (DCEFS) employs a bifunctional catalyst, dual-channel electrodes, and microneedle array to achieve continuous, decoupled-free coupling of nitric oxide sensing and hydrogen treatment.
2 Pd-Ni5P4/DCEFS pioneers a single-cycle “sense-hydrogen treatment-sense” strategy for closed-loop inflammation resolution, delivering efficient reactive nitrogen species/reactive oxygen species clearance with real-time nitric oxide-based feedback for precise therapeutic control.
3 Pd-Ni5P4/DCEFS innovatively establishes a closed-loop ‘sense-hydrogen treatment-sense’ paradigm guided by lesion-specific NO levels, enabling on-demand hydrogen intervention to potently resolve inflammation, robustly drive tissue regeneration, and markedly accelerate diabetic wound healing with excellent biocompatibility.
Keywords
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