Study summary · research use only
Double-network hydrogel enhanced by SS31-loaded mesoporous polydopamine nanoparticles: Symphonic collaboration of near-infrared photothermal antibacterial effect and mitochondrial maintenance for full-thickness wound healing in diabetes mellitus
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
This study developed a double-network hydrogel (F127DA/HAMA) enhanced with SS31-loaded mesoporous polydopamine nanoparticles (MPDA NPs), tested in vitro and in a diabetic rat model of full-thickness skin wounds. SS31, described as a mitochondria-targeted peptide, was associated with maintained mitochondrial function, reduced mitochondrial reactive oxygen species (ROS), altered macrophage polarization, and increased cell proliferation and migration in the components tested, while the MPDA NPs were reported to scavenge ROS, exert a photothermal antibacterial effect under near-infrared light, and control release of SS31 in response to ROS. In the diabetic rat model, the hydrogel (termed FH-M@S) was associated with macrophage M2 polarization, collagen deposition, new blood vessel formation, and wound healing, and the authors describe it as adhesive with biocompatibility and mechanical properties suited to irregular wounds.
Abstract
Diabetic wound healing has become a serious healthcare challenge. The high-glucose environment leads to persistent bacterial infection and mitochondrial dysfunction, resulting in chronic inflammation, abnormal vascular function, and tissue necrosis. To solve these issues, we developed a double-network hydrogel, constructed with pluronic F127 diacrylate (F127DA) and hyaluronic acid methacrylate (HAMA), and enhanced by SS31-loaded mesoporous polydopamine nanoparticles (MPDA NPs). As components, SS31, a mitochondria-targeted peptide, maintains mitochondrial function, reduces mitochondrial reactive oxygen species (ROS) and thus regulates macrophage polarization, as well as promoting cell proliferation and migration, while MPDA NPs not only scavenge ROS and exert an anti-bacterial effect by photothermal treatment under near-infrared light irradiation, but also control release of SS31 in response to ROS. This F127DA/HAMA-MPDA@SS31 (FH-M@S) hydrogel has characteristics of adhesion, superior biocompatibility and mechanical properties which can adapt to irregular wounds at different body sites and provide sustained release of MPDA@SS31 (M@S) NPs. In addition, in a diabetic rat full thickness skin defect model, the FH-M@S hydrogel promoted macrophage M2 polarization, collagen deposition, neovascularization and wound healing. Therefore, the FH-M@S hydrogel exhibits promising therapeutic potential for skin regeneration.
pepmg summarizes the peer-reviewed literature and links to every source — it sells nothing, ships nothing, and gives no medical, dosing, or human-use guidance. Don't just trust this summary: follow the citation to its source and read it yourself. Research use only.