Novel therapeutic approaches for treatment of drug-resistant Gram-positive infections

医院相关耐药细菌感染的出现代表了 美国医疗体系面临的主要挑战。迫切需要 开发新的和更有效的抗菌剂， 未被探索的细胞过程。这项提案的目标是找到一个新的类， 对金黄色葡萄球菌和致病性肠球菌有活性的生物药物。的 细菌细胞壁生物发生是许多现有的和新的 抗菌剂近年来，脂磷壁酸生物合成途径的研究不断涌现 作为开发新疗法的有吸引力的靶点。公布的数据表明， 脂磷壁酸是革兰氏阳性菌在大肠杆菌中生长和存活所必需的。 主持人本实验设计用于生成单域Camelid 抗体（纳米抗体），结合并包裹酶的细胞外结构域 参与脂磷壁酸的合成和修饰。成功完成后 在这个项目中，我们将获得许多抗S的纳米抗体。金黄色葡萄球菌和 肠球菌，将在体内研究中进一步验证。制定的战略 在拟议的研究中，也将适用于其他医学相关的细菌 病原体

Emergence of hospital-associated drug-resistant bacterial infections represents one of the major challenges for the US healthcare system. There is an urgent need for development of new and more effective anti-bacterial agents targeting previously unexplored cellular processes. The goal of this proposal is to find a novel class of biological drugs active against Staphylococcus aureus and pathogenic Enterococci. The bacterial cell wall biogenesis is an established drug target for many existing and novel antibacterial agents. In recent years, lipoteichoic acid biosynthesis pathways emerged as an attractive target for development of new therapeutics. Published data indicate that lipoteichoic acid is required for the growth and survival of Gram-positive bacteria in the host. The experiments in this proposal are designed to generate single domain camelid antibodies (nanobodies) that bind and inactivate extracellular domains of enzymes involved in synthesis and modification of lipoteichoic acid. Upon successful completion of this project we will obtain a number of nanobodies active against S. aureus and Enterococci that would be further validated in in vivo studies. The strategies developed in the proposed study will be also applicable to other medically relevant bacterial pathogens.