Brianna Ball, Arjun Sukumaran, Jonathan R. Krieger and Jennifer Geddes-McAlister*,
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引用次数: 0
摘要
对真菌病原体进行准确可靠的检测是控制感染的一个重要障碍,特别是考虑到真菌病原体,包括全球重要的人类病原体--新生隐球菌,已经适应了多种机制,以便在敌对的宿主环境中生存,并在合并感染期间适度产生毒力决定因子。这些病原体的适应性为改进(如技术和计算)提供了机会,以更好地了解宿主和病原体在疾病期间的相互作用,从而发现克服感染的新策略。在这项研究中,我们对体外共感染模型进行了比较蛋白质组图谱分析,研究了巨噬细胞中真菌和细菌负载的范围。通过比较依赖数据的采集和利用平行累积串行片段技术的独立数据采集,我们量化了双视角蛋白质组重塑的变化。我们报告了利用数据独立采集-平行累积序列片段技术(DIA-PASEF)对病原体蛋白的增强和新颖检测,尤其是在巨噬细胞单次感染和双重感染期间对真菌蛋白的检测。对仅用 DIA-PASEF 检测到的真菌蛋白的进一步鉴定发现了真菌毒力的一个新的决定因素,包括改变的胶囊和黑色素生成、耐热性和巨噬细胞感染性,这支持了蛋白质组学在发现抑制 C. neoformans 致病性的新的药物靶点方面取得的进展。
Comparative Cross-Kingdom DDA- and DIA-PASEF Proteomic Profiling Reveals Novel Determinants of Fungal Virulence and a Putative Druggable Target
Accurate and reliable detection of fungal pathogens presents an important hurdle to manage infections, especially considering that fungal pathogens, including the globally important human pathogen, Cryptococcus neoformans, have adapted diverse mechanisms to survive the hostile host environment and moderate virulence determinant production during coinfections. These pathogen adaptations present an opportunity for improvements (e.g., technological and computational) to better understand the interplay between a host and a pathogen during disease to uncover new strategies to overcome infection. In this study, we performed comparative proteomic profiling of an in vitro coinfection model across a range of fungal and bacterial burden loads in macrophages. Comparing data-dependent acquisition and data-independent acquisition enabled with parallel accumulation serial fragmentation technology, we quantified changes in dual-perspective proteome remodeling. We report enhanced and novel detection of pathogen proteins with data-independent acquisition-parallel accumulation serial fragmentation (DIA-PASEF), especially for fungal proteins during single and dual infection of macrophages. Further characterization of a fungal protein detected only with DIA-PASEF uncovered a novel determinant of fungal virulence, including altered capsule and melanin production, thermotolerance, and macrophage infectivity, supporting proteomics advances for the discovery of a novel putative druggable target to suppress C. neoformans pathogenicity.
期刊介绍:
Journal of Proteome Research publishes content encompassing all aspects of global protein analysis and function, including the dynamic aspects of genomics, spatio-temporal proteomics, metabonomics and metabolomics, clinical and agricultural proteomics, as well as advances in methodology including bioinformatics. The theme and emphasis is on a multidisciplinary approach to the life sciences through the synergy between the different types of "omics".