Project description:The domestic pig (Sus scrofa) provides a large animal model for human innate immune responses and inflammation that is also economically important in its own right. Results: We demonstrate that macrophages can be harvested from 3 different compartments of the pig (lungs, blood and bone-marrow), cryopreserved and subsequently recovered and differentiated in CSF-1. We have performed surface marker analysis and gene expression profiling on macrophages from these compartments, comparing 25 animals from 5 different breeds and their response to lipopolysaccharide. The results provide a clear distinction between alveolar macrophages (AM) and monocyte-derived (MDM) and bone-marrow-derived macrophages (BMDM). In particular, the lung macrophages express the growth factor, Flt1 and its ligand, VEGFA at high levels, suggesting a distinct pathway of growth regulation. We confirm that pig macrophages more closely resemble human, than mouse, in their set of LPS-inducible genes. Relatively few genes showed breed-specific differential expression, notably CXCR2 and CD302 in alveolar macrophages. In contrast, there was substantial inter-individual variation between pigs within breeds, mostly affecting genes annotated as being involved in immune responses. Conclusions: Future research will address whether such variation is heritable, and might form the basis for selective breeding for disease resistance or functional genomics. The domestic pig (Sus scrofa) provides a large animal model for human innate immune responses and inflammation that is also economically important in its own right. We demonstrate that macrophages can be harvested from 3 different compartments of the pig (lungs, blood and bone-marrow), cryopreserved and subsequently recovered and differentiated in CSF-1. We have performed surface marker analysis and gene expression profiling on macrophages from these compartments, comparing 25 animals from 5 different breeds and their response to lipopolysaccharide. The results provide a clear distinction between alveolar macrophages (AM) and monocyte-derived (MDM) and bone-marrow-derived macrophages (BMDM). In particular, the lung macrophages express the growth factor, Flt1 and its ligand, VEGFA at high levels, suggesting a distinct pathway of growth regulation. We confirm that pig macrophages more closely resemble human, than mouse, in their set of LPS-inducible genes. Relatively few genes showed breed-specific differential expression, notably CXCR2 and CD302 in alveolar macrophages. In contrast, there was substantial inter-individual variation between pigs within breeds, mostly affecting genes annotated as being involved in immune responses. Future research will address whether such variation is heritable, and might form the basis for selective breeding for disease resistance or functional genomics. 140 Affymetrix Snowball microarray were analysed from 5 different breed (DR, LR, LW, PIE and HAM). 5 pig per breed were used and cells were harvested from Lungs, blood and bone-marrow (AM, MDM and BMDM). Cells were left untreated (0h) or stimulated with LPS Salmonella enterica serotype minnesota Re 595 - 100ng/ml (7h)
Project description:The objective of this study was to identify porcine genes which expression was affected in vitro stimulation with LPS from Salmonella typhimurium. Microarray experiment was conducted to reveal genes being significantly differentially expressed in LPS stimulated versus unstimulated porcine alveolar macrophages from two from healthy pigs The comparison was done LPS alveolar macrophages versus unstimulated alveolar macrophages sampled from two healthy pigs. The experiment was conducted as common reference design.
Project description:In this study, we compared active histone marks (trimethylation on lysine 4 on histone 3 (H3K4me3)) in LPS-stimulated macrophages and LPS/IC-stimulated macrophages using bone marrow derived murine macrophages using ChIP-seq approach.
Project description:The aim of the current study was to investigate the response of in vitro differentiated trout macrophages, a primary cell culture system widely used in fish immunology research, to lipopolysaccharide (LPS) and to the analog viral ds(RNA) Poly I:C. To that end we have used a salmonid-specific microarray platform enriched with immune-related genes. The results clearly suggest that the molecular mechanisms involved in the response of macrophages to LPS and Poly (I:C) are specific in some signaling pathways related to cell communication, signal transduction and kinase cascades. Nevertheless, macrophages stimulated with bacterial or viral PAMPs also activate common transcription factors.
Project description:The objective of this study was to identify porcine genes which expression was affected in vitro stimulation with LPS from Salmonella typhimurium. Microarray experiment was conducted to reveal genes being significantly differentially expressed in LPS stimulated versus unstimulated porcine alveolar macrophages from two from healthy pigs
Project description:Bone marrow derived phagocytes from mouse, rat, rabbit and pig stimulated with LPS (100ng/mL) or with dsRNA (poly I:C) (1ug/mL) for 0,2,4,6 hours. Processed files include UMI matrices of QCed cells that belong to the first cluster (as described in the publication), which were used for all the analyses presented in the publication.
Project description:This dataset consists of RNA-seq data from human monocyte-derived macrophages that were subjected to siRNA treatment targeting RAD21 and either left untreated, or stimulated with LPS. In total, it includes 24 samples.