The activation profiles of macrophages under different immune and inflammatory conditions have generated great interest. LPS, in particular, is a commonly used in vitro model of infection and inflammation studies in macrophages. We have used gene expression microarrays to define the effects of each of three variables; LPS dose, LPS vs. interferons beta and gamma, and genetic background on the transcriptional response of mouse bone marrow-derived macrophages
Analysis of the transcriptional networks underpinning the activation of murine macrophages by inflammatory mediators.
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Cell-autonomous sex differences in gene expression in chicken bone marrow-derived macrophages.
Sex, Specimen part
View SamplesTo identify markers associated with inherent cellular sex-identity, we analysed cultured macrophages from male and female chick embryos. We found that male and female macrophages respond differently to stimulation by bacterial lipopolysaccharide and that female macrophages constitutively express higher levels of interferon target genes than male macrophages. To determine whether these differences resulted from the actions of gonadal hormones, we induced gonadal sex-reversal to alter the hormonal environment of the developing chick and analysed different tissues and macrophages from male and female embryos.
Cell-autonomous sex differences in gene expression in chicken bone marrow-derived macrophages.
Sex, Specimen part
View SamplesTo identify markers associated with inherent cellular sex-identity, we analysed macrophages from newly-hatched chicks. We found that male and female macrophages respond differently to stimulation by bacterial lipopolysaccharide and that female macrophages constitutively express higher levels of interferon target genes than male macrophages.
Cell-autonomous sex differences in gene expression in chicken bone marrow-derived macrophages.
Sex, Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Assembly of a Parts List of the Human Mitotic Cell Cycle Machinery.
Specimen part
View SamplesMarek's disease virus (MDV) is a highly contagious oncogenic herpes virus. Classed as an alpha herpes virus due to its DNA sequence and genome organization, its biological properties are more similar to those of gamma herpes viruses. MDV causes an initial cytolytic infection in B lymphocytes (3-6dpi) followed by infection of CD4+ T cells (at around 7dpi) where the virus becomes latent (for around two weeks) and then goes on to produce lymphoid tumours in the skin, nerves and internal organs. Early symptoms in susceptible birds include lameness, paralysis, loss of appetite, depression, blindness and immuno-suppression. The route of infection is usually respiratory and the disease is highly contagious, being spread by infective feather-follicle dander. Although birds may survive MDV infection, the resultant immuno-suppression leaves the birds highly susceptible to other infections. MDV infection can thus be associated with high mortality rates and, in turn, large economic losses throughout the worldメs poultry industry. Three-week-old chicks were inoculated with virus (RB1B) via an intra-gastric route and tissue samples were collected at 2, 3 and 4 days post-inoculation. Spleen and thymus tissue were examined from control and infected birds at 2, 3 and 4 days post-infection in birds known to be either susceptible or resistant to the virus. As well as understanding the host immune response to MDV, we are interested in identifying genes involved in disease resistance and so we have analysed the gene expression profiles at these times, when the innate immune response is active. We assume that genes underlying resistance will be involved at this early stage of the host immune response.
No associated publication
Age, Specimen part, Time
View SamplesInfectious bursal disease virus (IBDV) is a highly contagious dsRNA virus (Birnaviridae) which causes immuno-suppression in chickens. Although largely controlled by vaccination, new, virulent strains of the virus mean that infectious bursal disease (IBD or ëGumboroí disease) still remains a threat to the poultry industry. The virus infects dividing IgM+ B-lymphocytes and the main site of viral replication is the bursa of Fabricius where B cells are produced. Infection is spread orally via contaminated feed and water. IBDV affects young birds, with the disease usually being diagnosed in 3-6 week old birds. Younger birds do not show clinical signs but are immuno-suppressed. Symptoms include anorexia, depression, diahorrea, ruffled feathers, immuno-suppression and bursal lesions. The disease peaks between 2-5 days post infection and is practically cleared by day 7. Mortality is variable but can be up to around 70% with very virulent strains of the disease. Even if birds survive, the resulting immuno-suppression and effect on egg production in layer birds is significant. Being able to breed commercial lines of birds for enhanced genetic resistance to IBDV is an obvious goal in the fight against the disease. Three-week-old chicks were inoculated with virus via an intra-nasal route and tissue samples were collected at 2, 3 and 4 days post-inoculation. Bursa and spleen tissues were examined from control and infected birds at 2, 3 and 4 days post-infection in birds known to be either susceptible or resistant to the virus. As well as understanding the host immune response to IBDV, we are interested in identifying genes involved in disease resistance and so we have analysed the gene expression profiles at these times, when the innate immune response is active. We assume that genes underlying resistance will be involved at this early stage of the host immune response.
No associated publication
Age, Specimen part, Disease, Disease stage, Time
View SamplesTwo highly-passaged attenuated and three VP3 CAV mutant isolates were used in this study with the aim of elucidating the interactions of each of these proteins with the host organism.
No associated publication
Specimen part
View SamplesTranscriptional programmes involved in the eukaryotic cell cycle are activated sequentially throughout the process. In particular, the set of genes required for S and G2-M phases are highly conserved and induced one after the other.
No associated publication
Specimen part
View SamplesTranscriptional programmes involved in the eukaryotic cell cycle are activated sequentially throughout the process. In particular, the set of genes required for S and G2-M phases are highly conserved and induced one after the other.
Assembly of a Parts List of the Human Mitotic Cell Cycle Machinery.
Specimen part
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