Comparative analysis of gene expression in HAT4-nulls and HAT2-heterozygous knockout cells, versus wild type Leishmania donovani cells
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ABSTRACT: Histone acetylations are known to impact gene transcription. Here, we have attempted to examine the role of Leishmania donovani histone acetyltransferases HAT4 and HAT2 in regulating global gene expression. The transcriptome of HAT4-null promastigotes (Samples 2A, 2B) and HAT2-heterozygous knockout promastigotes (Samples 3A, 3B) have been compared with the transcriptome of wild-type Leishmania promastigotes (Samples 1A, 1B) and fold change in gene expression with respect to the control wild-type has been determined.
Project description:Histone acetylations are known to impact gene transcription. Here, we have attempted to examine the role of Leishmania donovani histone acetyltransferase HAT4 in regulating global gene expression. The transcriptome of HAT4-null promastigotes (Samples 2A, 2B) have been compared with the transcriptome of wild-type Leishmania promastigotes (Samples 1A, 1B) and fold change in gene expression with respect to the control wild-type has been determined. DNA microarray analysis was carried out with biological replicates, using RNA isolated from logarithmically growing promastigotes in two separate experiments. Bioanalyzer profiles of the isolated RNA samples were used to assess purity and integrity of the isolated RNA. Sample 1A and sample 1B are analyses carried out using RNA isolated from wild-type Leishmania donovani promastigotes. Sample 2A and sample 2B are analyses carried out using RNA isolated from HAT4-null promastigotes.
Project description:Murine bone marrow derived macrophages were infected with Leishmania major or Leishmania donovania promastigotes, allowed to phagocytose latex beads or not treated. Gene expression profiles were compared to identify i) the effect of Leishmania infection; ii) the differences in effects between L. major and L. donovani; and iii) the effect of pahgocytosis of latex beads.
Project description:In this study, we examined the transcriptome of Leishmania donovani promastigotes and axenic amastigotes to identify differentially regulated mRNAs utilizing the serial analysis of gene expression Keywords: stage differentiation; axenic amastigotes
Project description:Monastrol treatment of Leishmania donovani infected macrophages Macrophages were infected with Leishmania donovani and treated with monastrol to look for signalling molecules
Project description:The mRNA expression of antimony resistant strains of Leishmania donovani was compared to the expression of the sensitive Leishmania donovani.
Project description:Hypericin, a novel inhibitor of spermidine synthase of Leishmania donovani, has been found to cause necrotic like death of the parasite. Hypericin treatment has indicated the importance of spermidine in pathways other than redox metabolism of Leishmania parasite. We have used label free quantitative proteomics approach to compare the alteration in expression of proteins in untreated and hypericin treated Leishmania promastigotes.