Project description:We used RNA-seq to examine transcriptional proflies of midguts with suppression of Imd in progenitors (e_* samples) or enterocytes (M_* samples) . We found significant differences between the contributions of enterocyte IMD and progenitor IMD to intestinal homeostasis.
Project description:The purpose of this RNAseq is to analyse the effect of compound IMD-0354 on gene expression in melanoma A375 cells. RNAseq analysis identified unfolded protein response, cell cycle and DNA damage pathways to be effected by IMD-0354.
Project description:We used RNA-seq to examine transcriptional profiles of midgut progenitor cells with suppression of Imd in progenitors. We found significant differences between the contributions of progenitor IMD to intestinal homeostasis.
Project description:Long noncoding RNAs (lncRNAs), as a class of emerging regulators, play crucial role in regulating the strength and duration of innate immunity. However, little is known about how these Drosophila Imd immunity-related lncRNAs are regulated. Herein, we firstly revealed that overexpression of lncRNA-CR33942 could strengthen the expression of Imd pathway antimicrobial peptides Diptericin (Dpt) and Attacin-A (AttA) after infection, and vice versa. Secondly, RNA-seq analysis of post-infected lncRNA-CR33942-overexpressing flies further confirmed that lncRNA-CR33942 positively regulates the Drosophila Imd pathway. Mechanistically, we indicated that lncRNA-CR33942 interacts with NF-κB transcription factor Relish to promote its binding to Dpt and AttA promoters, thereby facilitating Dpt and AttA expression. Interestingly, we found that Relish can also directly promote lncRNA-CR33942 transcription by binding to its promoter. Finally, rescue experiments and dynamic expression profiling post-infection demonstrated the vital role of the Relish/lncRNA-CR33942/AMPs regulatory axis in enhancing inadequate Imd immune responses and maintaining immune homeostasis. Taken together, our study not only elucidates a novel mechanism about lncRNA in Drosophila Imd immune regulation, but also has important guiding significance for elucidating the complex regulatory mechanism of animal innate immune response.
Project description:Activation of innate immune responses in the Drosophila larval fat body affects the physiological host responses. In order to characterize the effect of the activated immune responses in the fat body on the Drosophila, we used whole-genome microarray analysis and found that activation of the immune deficieny pathway (Imd) in the fat body alters the transcriptional profiles of Drosophila larvae. As we expected many of genes involved in regulation of antimicrobial peptides were upregulated in the larvae with elevated Imd activity in the fat body. Notably, we found activatioan of Imd in the fat body negatively affects expression of genes involved in glycolysis, energy production and insulin signaling pathway. Overall, our analysis showed that activation of innate immune signaling in the larval fat body significantly affects cellular pathways that regulate metabolism.
