An Immunomodulatory Hydrogel by Hyperthermia‐Assisted Self‐Cascade Glucose Depletion and ROS Scavenging for Diabetic Foot Ulcer Wound Therapeutics

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(48)

Published: Oct. 7, 2023

Abstract Current therapeutic protocols for diabetic foot ulcers (DFUs), a severe and rapidly growing chronic complication in patients, remain nonspecific. Hyperglycemia‐caused inflammation excessive reactive oxygen species (ROS) are common obstacles encountered DFU wound healing, often leading to impaired recovery. These two effects reinforce each other, forming an endless loop. However, adequate inclusive methods still lacking target these aspects break the vicious cycle. This study proposes novel approach treating wounds, utilizing immunomodulatory hydrogel achieve self‐cascade glucose depletion ROS scavenging regulate microenvironment. Specifically, AuPt@melanin‐incorporated (GHM3) dressing is developed facilitate efficient hyperthermia‐enhanced local scavenging. Mechanistically, vitro/vivo experiments RNA sequencing analysis demonstrate that GHM3 disrupts ROS‐inflammation cascade cycle downregulates ratio of M1/M2 macrophages, consequently improving outcomes dorsal skin wounds rats. In conclusion, this proposed offers facile, safe, highly treatment modality DFUs.

Language: Английский

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Multifunctional Hydrogels for the Healing of Diabetic Wounds

Advanced Healthcare Materials, Journal Year: 2023, Volume and Issue: 13(1)

Published: Sept. 13, 2023

Abstract The healing of diabetic wounds is hindered by various factors, including bacterial infection, macrophage dysfunction, excess proinflammatory cytokines, high levels reactive oxygen species, and sustained hypoxia. These factors collectively impede cellular behaviors the process. Consequently, this review presents intelligent hydrogels equipped with multifunctional capacities, which enable them to dynamically respond microenvironment accelerate wound in ways, stimuli ‐responsiveness, injectable self‐healing, shape ‐memory, conductive real‐time monitoring properties. relationship between multiple functions also discussed. Based on wounds, antibacterial, anti‐inflammatory, immunomodulatory, antioxidant, pro‐angiogenic strategies are combined hydrogels. application repair systematically discussed, aiming provide guidelines for fabricating exploring role therapeutic processes.

Language: Английский

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M2 macrophage-derived exosomes promote diabetic fracture healing by acting as an immunomodulator

Bioactive Materials, Journal Year: 2023, Volume and Issue: 28, P. 273 - 283

Published: June 1, 2023

Diabetes mellitus is a chronically inflamed disease that predisposes to delayed fracture healing. Macrophages play key role in the process of healing by undergoing polarization into either M1 or M2 subtypes, which respectively exhibit pro-inflammatory anti-inflammatory functions. Therefore, modulation macrophage subtype beneficial for Exosomes perform an important improving osteoimmune microenvironment due their extremely low immunogenicity and high bioactivity. In this study, we extracted M2-exosomes used them intervene bone repair diabetic fractures. The results showed significantly modulate decreasing proportion macrophages, thereby accelerating We further confirmed induced conversion macrophages stimulating PI3K/AKT pathway. Our study offers fresh perspective potential therapeutic approach improve

Language: Английский

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Reactive Oxygen Species‐Scavenging Nanosystems in the Treatment of Diabetic Wounds

Advanced Healthcare Materials, Journal Year: 2023, Volume and Issue: 12(25)

Published: April 13, 2023

Diabetic wounds are characterized by drug-resistant bacterial infections, biofilm formation, impaired angiogenesis and perfusion, oxidative damage to the microenvironment. Given their complex nature, diabetic remain a major challenge in clinical practice. Reactive oxygen species (ROS), which have been shown trigger hyperinflammation excessive cellular apoptosis, play pivotal role pathogenesis of wounds. ROS-scavenging nanosystems recently emerged as smart multifunctional nanomedicines with broad synergistic applicability. The documented anti-inflammatory pro-angiogenic ability treatments predestines these promising options for treatment Yet, this context, therapeutic applicability efficacy be elucidated. Herein, ROS is deciphered, properties strengths capacity summarized. In addition, current challenges such potential future directions discussed through clinical-translational lens.

Language: Английский

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Multifunctional PtCuTe Nanosheets with Strong ROS Scavenging and ROS‐Independent Antibacterial Properties Promote Diabetic Wound Healing

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(8)

Published: Sept. 19, 2023

Abstract Nanozymes, as one of the most efficient reactive oxygen species (ROS)‐scavenging biomaterials, are receiving wide attention in promoting diabetic wound healing. Despite recent attempts at improving catalytic efficiency Pt‐based nanozymes (e.g., PtCu, best systems), they still display quite limited ROS scavenging capacity and ROS‐dependent antibacterial effects on bacteria or immunocytes, which leads to uncontrolled poor Hence, a new class multifunctional PtCuTe nanosheets with excellent catalytic, ROS‐independent antibacterial, proangiogenic, anti‐inflammatory, immuno‐modulatory properties for boosting healing, is reported. The show stronger better than PtCu. It also revealed that can enhance vascular tube formation, stimulate macrophage polarization toward M2 phenotype improve fibroblast mobility, outperforming conventional Moreover, promotes crosstalk between different cell types form positive feedback loop. Consequently, stimulates proregenerative environment relevant populations ensure normal tissue repair. Utilizing mouse model, it demonstrated significantly facilitated regeneration highly vascularized skin, percentage closure being over 90% 8th day, among reported comparable biomaterials.

Language: Английский

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Adipose Mesenchymal Stem Cell Derived Exosomes Promote Keratinocytes and Fibroblasts Embedded in Collagen/Platelet‐Rich Plasma Scaffold and Accelerate Wound Healing

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(40)

Published: June 21, 2023

Abstract Engineered skin substitutes derived from human significantly reduce inflammatory reactions mediated by foreign/artificial materials and are consequently easier to use for clinical application. Type I collagen is a main component of the extracellular matrix during wound healing has excellent biocompatibility, platelet‐rich plasma can be used as initiator cascade. Adipose mesenchymal stem cell exosomes crucial tissue repair play key roles in enhancing regeneration, promoting angiogenesis, regulating inflammation, remodeling matrix. Herein, plasma, which provide natural supports keratinocyte fibroblast adhesion, migration, proliferation, mixed form stable 3D scaffold. added scaffold improve performance engineered skin. The physicochemical properties this cellular analyzed, effect evaluated full‐thickness defect mouse model. reduces level inflammation promotes proliferation angiogenesis accelerate healing. Proteomic analysis shows that exhibit anti‐inflammatory proangiogenic effects collagen/platelet‐rich scaffolds. proposed method provides new therapeutic strategy theoretical basis regeneration repair.

Language: Английский

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Recent perspective of polymeric biomaterial in tissue engineering– a review

Materials Today Chemistry, Journal Year: 2023, Volume and Issue: 34, P. 101818 - 101818

Published: Nov. 18, 2023

Language: Английский

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Three‐Step Regenerative Strategy: Multifunctional Bilayer Hydrogel for Combined Photothermal/Photodynamic Therapy to Promote Drug‐Resistant Bacteria‐Infected Wound Healing

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(2)

Published: Sept. 27, 2023

Abstract The drug‐resistant bacterial‐infected skin wound is still a severe healthcare problem. Uncontrolled bacterial infection, abundant reactive oxygen species (ROS) content, and prolonged inflammatory response are detrimental to healing. Moreover, excessive vessel growth can result in unsatisfactory scar formation. Herein, three‐step regenerative strategy based on bilayered gelatin/acryloyl β ‐cyclodextrin (BGACD) hydrogel containing physical host–guest complexations chemical crosslinks proposed. loaded with humic acids (HAs) astragaloside IV (AS) the lower layer verteporfin (Vt) upper layer. Different ratios endow layers of different degradation rates. Under light irradiation, combination HAs‐induced photothermal therapy (PTT) verteporfin‐induced photodynamic effectively inhibits MRSA growth. HAs released from scavenge ROS promote M2 macrophage polarization angiogenesis during inflammation early proliferation phases, while releases suppress late remodeling phases. HAs‐AS@Vt@BGACD successfully achieves rapid scarless healing an MRSA‐infected model rats. Therefore, shows promising potential for treatment bacteria‐infected

Language: Английский

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Chitosan-based hydrogel dressings for diabetic wound healing via promoting M2 macrophage-polarization

Carbohydrate Polymers, Journal Year: 2024, Volume and Issue: 331, P. 121873 - 121873

Published: Jan. 30, 2024

Language: Английский

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A Double Network Composite Hydrogel with Self-Regulating Cu²⁺/Luteolin Release and Mechanical Modulation for Enhanced Wound Healing

ACS Nano, Journal Year: 2024, Volume and Issue: 18(26), P. 17251 - 17266

Published: June 22, 2024

Designing adaptive and smart hydrogel wound dressings to meet specific needs across different stages of healing is crucial. Here, we present a composite hydrogel, GSC/PBE@Lut, that offers self-regulating release cupric ions luteolin modulates mechanical properties promote chronic healing. The double network GSC, fabricated through photo-cross-linking gelatin methacrylate, followed by Cu2+-alginate coordination cross-linking. On one hand, GSC allows for rapid Cu2+ eliminate bacteria in the acidic pH environment during inflammation reduces hydrogel's strength minimize tissue trauma early dressing changes. other enables slow proliferation stage, promoting angiogenesis biocompatibility. Furthermore, inclusion pH- reactive oxygen species (ROS)-responsive nanoparticles (PBE@Lut) matrix controlled luteolin, offering antioxidant anti-inflammatory effects macrophage polarization. In murine model Staphylococcus aureus infected wounds, GSC/PBE@Lut demonstrates exceptional therapeutic benefits antibacterial, anti-inflammatory, angiogenic, regeneration. Overall, our results suggest hydrogels with bioactive agent modulation promising solution treating wounds.

Language: Английский

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