Lindsay Barnum, Mohamadmahdi Samandari, Yasir Suhail, Steven Toro, Ashkan Novin, Pejman Ghelich, Jacob Quint, Farnooosh Saeedinejad, Manu Komma, Kshitiz, Ali Tamayol
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引用次数: 0
Abstract
Upon injury, regenerating skin is metabolically active and requires oxygen for physiological processes related to wound healing. Such processes can be halted in hypoxic conditions common in chronic wounds. Microneedle arrays (MNAs) have been demonstrated to improve therapeutic delivery and wound healing. Recently, few studies have explored the use of oxygen-releasing MNAs; however, they involve complex manufacturing and handling and fail to eliminate cytotoxic byproducts. To address these challenges, biodegradable and mechanically robust gelatin methacryloyl-based MNAs are developed that can penetrate the tissue and release oxygen upon exposure to interstitial fluid and wound exudates. The oxygen release rate and biocompatibility of the developed MNAs with different compositions are evaluated and optimized. Interestingly, in vitro studies demonstrate that the optimized compositions can release oxygen at therapeutic levels and significantly increase viability of chronically hypoxic cells to match that of normoxic cells. In vivo studies further confirm that the optimized oxygen-generating MNAs do not cause any harm or impair healing in a murine model of acute skin injury. Additionally, transcriptomic analysis reveals upregulation of key pathways related to fibroblast motility, lipid metabolism, and a marked reduction in inflammatory signaling, all of which contribute to improved wound healing. The developed strategy can introduce new opportunities in elimination of hypoxia and therefore treatment of chronic wounds.
期刊介绍：
Advanced NanoBiomed Research will provide an Open Access home for cutting-edge nanomedicine, bioengineering and biomaterials research aimed at improving human health. The journal will capture a broad spectrum of research from increasingly multi- and interdisciplinary fields of the traditional areas of biomedicine, bioengineering and health-related materials science as well as precision and personalized medicine, drug delivery, and artificial intelligence-driven health science.
The scope of Advanced NanoBiomed Research will cover the following key subject areas:
▪ Nanomedicine and nanotechnology, with applications in drug and gene delivery, diagnostics, theranostics, photothermal and photodynamic therapy and multimodal imaging.
▪ Biomaterials, including hydrogels, 2D materials, biopolymers, composites, biodegradable materials, biohybrids and biomimetics (such as artificial cells, exosomes and extracellular vesicles), as well as all organic and inorganic materials for biomedical applications.
▪ Biointerfaces, such as anti-microbial surfaces and coatings, as well as interfaces for cellular engineering, immunoengineering and 3D cell culture.
▪ Biofabrication including (bio)inks and technologies, towards generation of functional tissues and organs.
▪ Tissue engineering and regenerative medicine, including scaffolds and scaffold-free approaches, for bone, ligament, muscle, skin, neural, cardiac tissue engineering and tissue vascularization.
▪ Devices for healthcare applications, disease modelling and treatment, such as diagnostics, lab-on-a-chip, organs-on-a-chip, bioMEMS, bioelectronics, wearables, actuators, soft robotics, and intelligent drug delivery systems.
with a strong focus on applications of these fields, from bench-to-bedside, for treatment of all diseases and disorders, such as infectious, autoimmune, cardiovascular and metabolic diseases, neurological disorders and cancer; including pharmacology and toxicology studies.
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