Novel honeycomb gallo-silicate microspheres for rapid hemostasis of oral and maxillofacial wounds

高度血管化的口腔颌面部出血不适合 通过止血带放置进行控制，通常需要使用局部止血剂（THA）。 THA通常用于控制严重出血，这在军事和民用中都存在 院前护理在接受手术的患者中，控制止血的需求更大。 抗血栓治疗或患有出血性疾病。同时，口腔伤口和 拔牙部位暴露于唾液中丰富的微生物菌群，这可能引起急性或 慢性感染，延迟愈合，并因抗药性的上升而复杂化 物种同时具有抗菌性的THA可以预防这些并发症。本实验室 最近发现了一类新的高表面积，蜂窝状硅酸盐微球框架 (SMF)促进快速止血的吸收剂。基于这一发现，我们的长期目标是 使用蜂窝状SMF开发快速作用的局部止血剂和抗菌剂 与镓交换，这将进一步加强止血效果，并确保抗菌 活动外源性供应的镓（以Ga 3+的形式）对 细菌细胞依赖于其取代Fe 3+的能力，从而扰乱细菌代谢。 同时，根据文献，我们假设，报道的离子止血作用 镓依赖于其絮凝纤维蛋白的能力。我们的多学科团队在硅酸盐领域的专业知识 将利用化学、材料化学、血液学和微生物学来开发 镓交换SMF（Ga-SMF）。该项目将从综合报告开始， SMF的表征（目标1），包括其止血疗效以及机制 从而促进止血。镓硅酸盐微球框架（Ga-SMF）将在 离子交换法（Aim 2）物理性质、镓释放曲线、生物相容性 和止血功效将被表征，并且镓离子增强止血功效的机制将被表征。 将研究止血。最后，将针对一组抗微生物剂测试抗微生物功效。 相关细菌直接交付物是一种具有双重止血功能的新型抗菌THA 作用，触发快速止血和预防感染，可以承受应用良好 除了口腔和颌面部的术后修复。

Hemorrhages in the highly vascularized oral and maxillofacial region are not amenable to control by tourniquet placement and often require the use of Topical Hemostatic Agents (THAs). THAs are commonly used to control severe bleeding, this is the case in both military and civilian pre-hospital care. The need for controlling hemostasis is even greater in patients undergoing antithrombotic therapy or suffering from bleeding disorders. Meanwhile, oral wounds and extraction sites are exposed to the rich microflora present in saliva, which can induce acute or chronic infections that delay healing, and are complicated by the rise of antibiotic-resistant species. THAs that are also antimicrobial would prevent these complications. Our laboratory recently discovered a new class of high surface area, honeycomb silicate microsphere framework (SMF) absorbents that prompt rapid hemostasis. Building on this discovery, our long-term goal is to develop fast-action, topical hemostatic and antimicrobial agents using honeycomb SMFs exchanged with gallium, which will further strengthen hemostatic efficacy and ensure antimicrobial activity. The antimicrobial efficacy of exogenously supplied gallium (in the form of Ga3+) to bacterial cells relies on its ability to replace Fe3+, thereby perturbing bacterial metabolism. Concurrently, based on the literature, we hypothesize that the reported hemostatic action of ionic gallium relies on its ability to flocculate fibrin. The expertise of our multidisciplinary team in silicate chemistry, materials chemistry, hematology, and microbiology will be leveraged to develop gallium-exchanged SMFs (Ga-SMFs). The project will initiate with the synthesis and characterization of SMFs (Aim 1), including their hemostatic efficacy as well as the mechanisms by which they promote hemostasis. Gallo-silicate microsphere frameworks (Ga-SMFs) will be produced by ion-exchange (Aim 2). Physical properties, gallium release profiles, biocompatibility and hemostatic efficacy will be characterized, and mechanisms by which gallium ion enhances hemostasis will be investigated. Finally, the antimicrobial efficacy will be tested against a panel of relevant bacteria. Direct deliverables are a new class of antimicrobial THAs with dual hemostatic action, triggering rapid hemostasis and preventing infections, that could bear applications well beyond oral and maxillofacial post-surgical hemorrhages.