Honors College Thesis
 

Identification of Autophagy Related Genes in Mycobacterium tuberculosis

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https://ir.library.oregonstate.edu/concern/honors_college_theses/5999n545m

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  • A primary target of Mycobacterium tuberculosis is the human alveolar macrophage. Infection by this bacterium can lead to a variety of responses, such as apoptosis, autophagy, and necrosis, which may be involved in controlling the infection. M. tuberculosis has evolved mechanisms to evade or use the host-mediated processes to its advantage. One of them, autophagy, has been shown to be suppressed by the bacterium. The goal of this study was to identify mycobacterial genes involved in autophagy inhibition. A transposon mutant bank was created using the M. tuberculosis virulent strain H37Rv and temperature-sensitive plasmid containing transposon Tn6753. U937 human macrophages were infected with the mutant library and individual clones were screened for attenuation. Once mutants showing impaired ability to grow within the host macrophage were identified, they were screened for an inability to inhibit autophagy. Fifty-four mutants exhibiting attenuation within the macrophage were identified. An LC3-staining assay was performed on eighteen clones that showed the greatest attenuation. Three of them were not associated with autophagy inhibition. The sequencing of the inactivated genes is in progress.
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file details CARLIN_Paper_8-28-08.pdf 2017-07-29 Pubblico Scaricare