Project description:The interferon (IFN) is a major effector of the innate immunity which mediates an adaptive immune response against broad spectrum pathogens. The aim of this work has been to investigate the differences of the virus mimic dsRNA (Poly I:C)-inducted in vivo transcriptomic alteration between pigs with high (HIGH) and low (LOW) serum interferon-alpha production. The pigs with extreme yield of induced interferon-alpha from a F2 resource population were selected for whole blood gene expression analysis using the porcine Affymetrix microarray
Project description:Neutrophils play a key role in the innate immunity and the first line of defense against invading pathogens. The aim of this work is to investigate the neutrophil responses and transcriptomic alteration in the porcine peripheral blood by employing Poly I:C to emulate viral infection. The pigs with the two-tailed critical value of neutrophilia post 4h with poly I:C stimulation from a Duroc-Erhualian F2 population.
Project description:Porcine satellite cells play a vital role in the construction, development, and self-renewal of skeletal muscle. In this study, porcine satellite cells were exposed to mimic viral infection poly (I:C) during proliferation and differentiation phases at 0h, 12h, 24h and 48h time points. The untreated and treated porcine satellite cells during proliferation and differentiation phases were further analyzed by RNA sequencing technology. In the proliferation and differentiation phases of porcine satellite cells grown under poly (I:C), 88, 119, 104 and 95 genes were differentially expressed in 0h – 12h treated, 12h – 24h treated, 0h – 24h treated and 24h – 48h untreated comparison libraries, respectively. The GO terms analysis results showed that in the proliferation phase of treated porcine satellite cells, the up-regulated genes related to the immune system were highly expressed. In addition, the gene expression associated with muscle structure development, response to growth factor emerged in the differentiation phase of untreated porcine satellite cells. The biological pathways associated with Influenza A, Toll-like signaling as well as chemokine signaling were revealed through poly (I:C) stimulation of porcine satellite cells. The differentially expressed genes were confirmed by quantitative real-time PCR. Our findings expanded the understanding of gene expression and signaling pathways about the infiltrated mechanism of the virus into porcine skeletal muscle satellite cells.
Project description:To investigate the effect of Bmal1 on poly(I:C) response, we isolate mRNA from PBS or poly(I:C)-injected WT and myeloid Bmal1 KO mice. We then compare the poly(I:C)-induced transcriptomic change between WT and Bmal1 KO peritoneal myeloid cells.
Project description:Spermatogenesis is an intricate developmental process occurring in testes by which spermatogonial stem cells (SSCs) self-renew and differentiate into mature sperm. The molecular mechanisms for SSC self-renewal and differentiation, while have been well studied in mice, may differ between mice and domestic animals including pigs. To gain knowledge about the molecular mechanisms for porcine SSC self-renewal and differentiation that have to date been poorly understood, here we isolated and enriched primitive spermatogonia from neonatal porcine testes, and exposed the cells to retinoic acid, a direct inducer for spermatogonial differentiation. We then identified that retinoic acid could induce porcine primitive spermatogonial differentiation into leptotene spermatocyte-like cells, which was accompanied by a clear transcriptomic alteration, as revealed by the RNA-sequencing analysis. We also compared retinoic acid-induced in vitro porcine spermatogonial differentiation with the in vivo process, and compared retinoic acid-induced in vitro spermatogonial differentiation between pigs and mice. Furthermore, we analyzed retinoic acid-induced differentially expressed long non-coding RNAs (lncRNAs), and demonstrated that a pig-specific lncRNA, lncRNA-106504875, positively regulated porcine spermatogonial proliferation by targeting the core transcription factor ZBTB16. Taken together, these results would help to elucidate the roles of retinoic acid in porcine spermatogonial differentiation, thereby contributing to further knowledge about the molecular mechanisms underlying porcine SSC development and, in the long run, to optimization of both long-term culture and induced differentiation systems for porcine SSCs.
Project description:Poly(A) and CUT RNA fractions are compared using 3 'Long-SAGE deep-sequencing. ArrayExpress Release Date: 2008-12-19 Publication Title: Widespread bidirectional promoters are the major source of cryptic transcripts in yeast Publication Author List: Helen Neil, Christophe Malabat, Yves d'Aubenton-Carafa, Zhenyu Xu, Lars M. Steinmetz and Alain Jacquier Person Roles: submitter Person Last Name: Malabat Person First Name: Christophe Person Mid Initials: Person Email: christophe.malabat@pasteur.fr Person Phone: Person Address: Unité de Génétique des Interactions Macromoléculaires; CNRS, URA2171,F-75015, Paris, France Person Affiliation: Institut Pasteur
Project description:RNA sequencing was performed to identify immune-related genes that were differentially expressed in porcine monocyte-derived dendritic cells following stimulation with a novel phytoglycogen-based nanoparticle (Nano-11) and the TLR3 agonist poly(I:C).