Project description:①Background:Tuberculosis is mainly a respiratory tract infection caused by mycobacterium tuberculosis and one of the leading causes of death worldwide. According to the Global Tuberculosis Report in 2021, About a quarter of the world's population is infected with Mycobacterium tuberculosis and China is the second highest burden of TB. Although TB diagnosis and prevention techniques have become more mature, the number of TB cases is still increasing, mainly due to: the prevalence of drug-resistant tuberculosis bacteria, tuberculosis and HIV co-infection, long incubation time of mycobacterium tuberculosis difficult to early diagnosis and so on. Therefore, it is of great significance to study the pathogenesis of mycobacterium tuberculosis infection.②Method: THP-1 cells were treated with 50ng/ml PMA for 24 hours, so that THP-1 cell can be induced into macrophages. After that THP-1 macrophages were infected with mycobacterium tuberculosis H37Rv(MOI=1), which were collected and applied to RNA-sequencing. The constructed sequencing library was sequenced using an Illumina Novaseq 6000 system.
Project description:Previous reports have shown low vitamin D serum levels and polymorphisms in the vitamin D receptor (VDR) to be associated with increased risk for TB. Given that 1?,25-dihydroxyvitamin D3 has a role in lipid metabolism control, we tested whether the link between 1?,25-dihydroxyvitamin D3 and tuberculosis involves macrophage lipid metabolism. Since formation of lipid droplets (LD) is a hallmark of lipid dysregulation in M. tuberculosis-infected macrophages, we measured LD content as a readout of altered lipid metabolism in infected THP-1 cells. Induction of LD, which peaked by 24 hours post-infection was prevented by addition of 1?,25-dihydroxyvitamin D3 at the time of infection. To investigate the mechanism of 1?,25-dihydroxyvitamin D3 modulation of LD formation, we analyzed the transcriptome of M. tuberculosis-infected THP-1 cells with and without 1?,25-dihydroxyvitamin D3 treatment. THP-1 cells were cultured in 24-well flat bottom plates, pre-treated with 20ng/ml PMA for 24 h, and incubated with M. tuberculosis H37Rv. After 4 hours of infection, cells were washed to remove extracellular bacteria and treated with 100 nM of 1?,25-dihydroxyvitamin D3. THP-1 cells were collected and analyzed at 24h. 3 biological replicates in each of the 4 groups were prepared: Infected, Infected plus 1?,25-dihydroxyvitamin D3, Non-infected, Non-infected plus 1?,25-dihydroxyvitamin D3.
Project description:Previous reports have shown low vitamin D serum levels and polymorphisms in the vitamin D receptor (VDR) to be associated with increased risk for TB. Given that 1α,25-dihydroxyvitamin D3 has a role in lipid metabolism control, we tested whether the link between 1α,25-dihydroxyvitamin D3 and tuberculosis involves macrophage lipid metabolism. Since formation of lipid droplets (LD) is a hallmark of lipid dysregulation in M. tuberculosis-infected macrophages, we measured LD content as a readout of altered lipid metabolism in infected THP-1 cells. Induction of LD, which peaked by 24 hours post-infection was prevented by addition of 1α,25-dihydroxyvitamin D3 at the time of infection. To investigate the mechanism of 1α,25-dihydroxyvitamin D3 modulation of LD formation, we analyzed the transcriptome of M. tuberculosis-infected THP-1 cells with and without 1α,25-dihydroxyvitamin D3 treatment.
Project description:THP-1 Macrophages were infected with Mycobacterium tuberculosis clinical isolates from Xinjiang, China, and H37Rv for 24 hours, respectively, and their transcriptomes were sequenced to investigate the specific biological processes that occur after infection of macrophages with Mycobacterium tuberculosis clinical isolates from Xinjiang, China.
Project description:This study aims to identify the specific miRNA of mycobacterium tuberculosis (M.tb) infected THP-1 by next-generation sequencing, and further to explore the role of miRNA in innate immunity against M.tb infection.Comprehensive analysis of the next-generation sequencing results showed that the expression of miR-99a-5p was significantly lower in the MTB infected THP-1 cells.
Project description:To compare gene expression changes induced by infection with Mycobacterium tuberculosis (Mtb) with changes induced by purified Mtb products, we infected THP-1 cells with Mtb strain H37Rv or treated with purified Mtb products, then performed RNAseq.
Project description:Tuberculosis is a chronic infectious disease caused by Mycobacterium tuberculosis (M.tb) infection, remains a leading cause of morbidity and mortality world-wide. Circular RNAs are non-coding RNAs with diverse functions. However, most M.tb related circRNAs remain undiscovered. We used circRNA-seq technology to sequence the THP-1 cells infected with virulent and avirulent M.tb strains for 12 h.
Project description:Transcriptional response of THP-1 cells infected with Mycobacterium tuberculosis utilizing ‘Active’ Mtb and ‘Dormant’ Mtb infection models at different time points. Analysis of the transcriptomic data deciphered the perturbation of gamut of host cellular pathways that are common and differentially manifested in the ‘Active’ Mtb and ‘Dormant’ Mtb infection models.
