Expression analysis of Mycobacterium tuberculosis H37Rv biofilm after treatment with DTT ( Reduced) for 29 hrs
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ABSTRACT: Expression profile of Mycobacterium tuberculosis H37Rv biofilm as induced by DTT (Reduced) 6mM DTT reduced at 6 mM concentration was added to log phase culture of Mtb H37Rv. After 29 hours RNA was isolated and hybridization was done on microarrays
Project description:Transcriptional profiling of SirR and manganese regulated expression of genes in Mycobacterium tuberculosis strains comparing high manganese vs. low manganese in Rv (wild type Mycobacterium tuberculosis) and ST70 (mntR mutant strain of Mycobacterium tuberculosis) Two strains each with two conditions experiment, Rv (Mycobacterium tuberculosis wild type strain) high manganese vs. low manganese and ST70 (mntR mutant strain of Mycobacterium tuberculosis) high manganese vs. low manganese. Number of biological replicates is 3 for each condition for each strain.
Project description:Comparison of gene expression profile of the whiB4 mutant strain of Mycobacterium tuberculosis with the wild type Mycobacterium tuberculosis H37RV Mtb WhiB4 mutant mRNA was compared with the mRNA of wtMtb H37RV under aerobic conditons Aerbic conditions OD600 nm of 0.4, MtbWhiB4KO vs wtMtb, biological replicates: 3 wt Mtb H37RV and 3 MtbWhiB4 KO
Project description:Effect of Thiol reductive stress (DTT 1mM) on M.tb Rv was studied. DTT reduced at 1 mM concentration was added to log pahse culture of M.tb H37Rv. After Three hours RNA was isolated and hybridization was done on HRI-UMNDJ Mycobacterium tuberculosis 4.8K CAG_Mtb microarrays.
Project description:Transcriptional profiling of mycobacterium tuberculosis clinical isolates in China comparing extensively drug-resistant tuberculosis with drug sensitive one. The same condition experiment. The samples were from the different drug-resistant strains. Only one replicate.
Project description:Extensively drug resistant tuberculosis (XDR-TB) showed many different characteristics including the extreme drug resistance versus the drug sensitive clinical isolates (DS-TB), to know better about the reasons we used the tuberculosis host cells named as THP-1 (one kind of the macrophage cells) to be infected by the XDR-TB and DS-TB.DS strain A36 and the XDR strain B42 and was typical and selected by our lab. Then the total RNA of infected or uninfected THP-1 cells was extract and purified for the analysis by the chip (22K Human Genome chip representing the 21522 ORF of human with the oligonucleotide probe of 70 mer from CapitalBio Corp., Beijing, China). The results reflected the different expressed genes involved in apoptosis, secreted cytokines and signal pathway and so on. Those results might indicate the how the XDR-TB cause the pathogenesis. In this study, the well grown THP-1 cells were separated and cultured in three ampoules. Cells in one ampoules were infected with XDR-TB strain of B42. Cells in another ampoules were infected with DS-TB strain of A36, with the cells in the third one were not infected and just treated with PBS as the control. Then the dual channel method was used for detecting the hybridization of B42 vs the control or A36 vs control. This work was repeated for three times.
Project description:2 experiments: (1) Mtb, Tween vs Cholesterol at 3 & 24hrs (2) CDC1551 vs kstR mutant of CDC1551, with and w/o Cholesterol In triplicate, dye flips included.
Project description:E. coli lipopolysacharide was treated on SL2* cells for 1hr, 4 and 12hrs respectivly. cDNA from those cells was compared with control. For one sample, cyclohexamide was treated for 1hr and then LPS was treated for 4hrs. Then, compared with control.
Project description:Background. MicroRNAs (miRNAs) are short (~22 nt) non-coding regulatory RNAs that control gene expression at the translational level. Deregulation of miRNA expression has been discovered in a wide variety of tumours and it is now clear that they contribute to cancer development and progression. This prompted the development of miRNA-chips for cancer diagnosis or prognosis, opening a new door to understand carcinogenesis. Cervical cancer is one of the most common cancers in women worldwide. Therefore, there is a strong need for a non-invasive, fast and efficient method to diagnose the disease. We investigated miRNA expression profiles in cervical cancer using a microarray platform developed in house containing probes for mature miRNAs. Results. We have evaluated miRNA expression profiles of a heterogeneous set of cervical tissues from 25 different patients. This set included 19 normal cervical tissues, 4 squamous cell carcinoma, 5 high-grade squamous intraepithelial lesion (HSIL) and 9 low-grade squamous intraepithelial lesion (LSIL) samples. We observed high variability in miRNA expression especially among normal cervical samples, which prevented us from obtaining a unique miRNA expression signature for this tumour type. However, miRNAs deregulation in malignant and pre-malignant cervical tissues was detected after tackling the high variability observed. We were also able to identify putative targets of relevant candidate miRNAs. Conclusions. Our results show that miRNA deregulation may play an important role in the malignant transformation of cervical squamous cells. In addition, deregulated miRNAs highlight new candidate targets allowing a better understanding of the molecular mechanism of this tumour type. In this study we used a common reference design experiment where the common reference used was a commercial RNA from normal cervix (Ambion) and the test samples were 4 pre-treatment squamous cell cervical carcinoma, 7 high-grade Squamous Intraepithelial Lesion (CINII, n=2 and CIN III, n=5) sample, 9 low-grade Squamous Intraepithelial Lesion (CIN I) samples, 19 normal cervix samples and 4 pools of normal cervix samples.
Project description:The Squalius alburnoides complex (Steindachner) is one of the most intricate hybrid polyploid systems known in vertebrates. In this complex, the constant switch of the genome composition in consecutive generations, very frequently involving a change on the ploidy level, promotes repetitive situations of potential genomic shock. Previously in this complex, it was shown that in response to the increase in the genome dosage, triploid hybrids could regulate gene expression to a diploid state. In this work, we compared the small RNA profiles in the different genomic compositions interacting in the complex. Using high-throughput arrays and sequencing technologies, we were able to verify that diploid and triploid hybrids were closely related: they shared most of their sequences and their miRNA expression profiles were highly correlated. However, an overall view indicates an up-regulation of a substantial number of miRNAs in triploids. Also, the global miRNA expression in triploids was higher than predicted from an additive model. These results point to a participation of miRNAs in the cellular functional stability needed when the ploidy change. In this study, miRNA expression from 3 adult tissues (brain, muscle and liver) from 3 individuals of each genomic composition (PAA, PA, AA and PP) was analysed using microarrays.