鲁德大学和沙希德·比希蒂大学(SBU)化学家以及伊朗的同事制作了一部用于伤口敷料的水凝胶膜。它保护伤口免受细菌的影响,对健康组织无害。此外,其多孔结构可以容纳抗生素,从而杀死危险的微生物并提供额外的保护。结果发表在《国际生物大分子》杂志上。
治疗伤口的主要目的是防止感染。有开放的伤口,微生物可以直接进入体内。这显着使伤口愈合复杂化并可能导致更严重的后果,因此为伤口开发抗菌涂层很重要。现代方法之一是水凝胶膜。与传统疗法不同,水凝胶模仿健康组织并覆盖伤口,从而保护其免受细菌的侵害。它们还有助于冷却伤口,而不是过度干燥。此外,水凝胶可以含有可为伤口提供额外保护的药物。鲁德大学和SBU化学家与伊朗的同事创造了这样的涂层,并证明了其有效性。
"Since the hydrogels' hydrated molecular and porous structure, they can mimic the biological and physicochemical characteristics of the tissue environment hydrogel-based wound dressings have remarkable features such as providing a cooling sensation, sustaining a wet circumstance at the interfacing wound, maintaining a barrier to microorganisms, permitting gaseous exchange, and permitting wound exudate absorption,"said Ahmad Shaabani, a leading researcher at the Joint Institute for Chemical Research of RUDN and SBU.
化学家制造了一种涂层,涂有可以含有药物的毛孔。该膜本身覆盖了伤口,药物逐渐从毛孔中出来,防止微生物扩散。水凝胶由羧甲基纤维素(普通纤维素的衍生物)和有机金属框架UIO-66组成,并带有多孔结构,它们放置了流行的抗生素四环素。科学家研究了不同浓度的UIO-66如何影响水凝胶的特性及其释放抗生素的能力。选择了最佳参数后,化学家确定了用大肠杆菌和金黄色葡萄球菌的抗生素COPE的水凝胶如何。
水凝胶对细菌表现出很高的效率,对人结缔组织细胞无害。在带有人造汗水和伤口渗出液培养基的培养皿中,大肠杆菌和金黄色葡萄球菌在距该药物6.5-8.5 mm的半径内死亡。最初,抗生素释放率很高(在前五个小时内,高达50%的药物从水凝胶中脱出),然后稳定速率,并且水凝胶在接下来的三天内慢慢释放了剩余的药物。
"Designing an antibacterial agent with a suitable water vapour permeability, good mechanical properties, and controlled antibiotic release is a promising method for stopping bacterial infection in wound tissue. The designed hydrogel films can attract great attention to construct a safe and straightforward system through a green method and control the microbial growth in wound tissue,"said Ahmad Shaabani, a leading researcher at the Joint Institute for Chemical Research of RUDN and SBU.
Source:https://www.rfbr.ru/rffi/eng