Project 1: Transmission Biology of M. tuberculosis: Genes Required to Survive Stressful Transitions

摘要 这个项目的目标是确定其抑制作用可能提供新的方法来减少 &lt；1未感染的结核病(TB)感染者平均产生的病例数 人口：R0。具体地说，使用与生理相关的液体和环境条件，目标是 对结核分枝杆菌(Mtb)生存所需的基因进行全基因组调查 在从一个宿主传播到另一个宿主的过程中遇到的转变：从坏死性肺病变 到达与呼吸道相连的空腔；从那里到经过干燥的排出的微滴；以及从那里 在那里，新宿主的肺泡重新水化。结核分枝杆菌可诱导CRISPRi文库将接受 以确定结核分枝杆菌赖以生存的基因。与 该计划项目中的其他项目和核心将使我们能够优先考虑单个突变株，使它们 为了真实地模拟机械雾化以测试它们感染小鼠的能力，并确定豚鼠 感染了它们可以通过产气性传播疾病。同时，将对结核病药物和工具化合物进行测试 它们对经历这些传播相关压力的结核分枝杆菌的影响。

Abstract The goal of this project is to identify gene products whose inhibition could offer fresh approaches to reducing to <1 the number of cases generated by the average infected person with tuberculosis (TB) in an uninfected population: the R0. Specifically, using physiologically relevant fluids and environmental conditions, the goal is to conduct a genome-wide survey for genes that Mycobacterium tuberculosis (Mtb) requires to survive the following transitions it encounters in the course of transmission from one host to another: from a necrotic pulmonary lesion to a cavity connected to an airway; from there to expelled micro-droplets that undergo dessication; and from there to rehydration in the pulmonary alveoli of a new host. Inducible CRISPRi libraries of Mtb will be subjected to each of these transitions to identify the genes on which Mtb depends to survive them. Collaboration with the other Projects and Cores in this Program Project will allow us to prioritize individual mutant strains, subject them to realistically-modeled mechanical aerosolization to test their ability to infect mice, and determine if guinea pigs infected with them can transmit disease aerogenically. In parallel, TB drugs and tool compounds will be tested for their impact on Mtb undergoing these transmission-related stresses.