Shiekh Parvaiz A, Singh Anamika, Kumar Ashok
Biomaterial and Tissue Engineering Group, Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, India.
Biomaterial and Tissue Engineering Group, Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, India; Centre for Nanosciences, Indian Institute of Technology Kanpur, Kanpur, India; Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, India.
Biomaterials. 2020 Aug;249:120020. doi: 10.1016/j.biomaterials.2020.120020. Epub 2020 Apr 13.
Lack of oxygen, reduced vascularization, elevated oxidative stress, and infection are critical clinical hallmarks of non-healing chronic diabetic wounds. Therefore, delivering oxygen, inducing angiogenesis, and management of oxidative stress and infection may provide newer and improved therapeutic avenues for better clinical outcomes in diabetic wound healing. Here, we report the development and evaluation of an exosome laden oxygen releasing antioxidant wound dressing OxOBand to promote wound closure and skin regeneration in diabetic wounds. OxOBand is composed of antioxidant polyurethane (PUAO), as highly porous cryogels with sustained oxygen releasing properties and supplemented with adipose-derived stem cells (ADSCs) exosomes. Exosomes engulfed by the cells enhanced the migration of human keratinocytes and fibroblasts and increased the survival of human neuroblastoma cells under hyperglycemic conditions. OxOBand facilitated faster wound closure, enhanced collagen deposition, faster re-epithelialization, increased neo-vascularization, and decreased oxidative stress within two weeks as compared to untreated diabetic control wounds. The dressing promoted the development of mature epithelial structures with hair follicles and epidermal morphology similar to that of healthy skin. In clinically challenging infected diabetic wounds, these dressings prevented infection and ulceration, improved wound healing with increased collagen deposition, and re-epithelialization. Altogether, OxOBand is a remarkably newer treatment strategy for enhanced diabetic wound healing and may lead to novel therapeutic interventions for the treatment of diabetic ulcers.
缺氧、血管化减少、氧化应激升高和感染是非愈合性慢性糖尿病伤口的关键临床特征。因此,输送氧气、诱导血管生成以及管理氧化应激和感染可能为改善糖尿病伤口愈合的临床结果提供更新且更好的治疗途径。在此,我们报告了一种负载外泌体的释氧抗氧化伤口敷料OxOBand的开发和评估,以促进糖尿病伤口的伤口闭合和皮肤再生。OxOBand由抗氧化聚氨酯(PUAO)组成,是具有持续释氧特性的高度多孔冷冻凝胶,并补充了脂肪来源干细胞(ADSCs)外泌体。细胞吞噬的外泌体增强了人角质形成细胞和成纤维细胞的迁移,并在高血糖条件下提高了人神经母细胞瘤细胞的存活率。与未处理的糖尿病对照伤口相比,OxOBand在两周内促进了更快的伤口闭合、增强了胶原蛋白沉积、更快的再上皮化、增加了新血管形成并降低了氧化应激。该敷料促进了具有毛囊的成熟上皮结构的发育以及与健康皮肤相似的表皮形态。在具有临床挑战性的感染性糖尿病伤口中,这些敷料预防了感染和溃疡,通过增加胶原蛋白沉积和再上皮化改善了伤口愈合。总之,OxOBand是一种显著更新的用于增强糖尿病伤口愈合的治疗策略,可能会带来治疗糖尿病溃疡的新型治疗干预措施。