Effect of depletion of ALKBH5 on transcriptional landscape in bone marrow neutrophils from septic mice
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE224651 | GEO | 2023/12/21
REPOSITORIES: GEO
Similar Datasets
Project description:By performing transcriptome-wide RNA sequencing (RNA-seq) analysis on the peritoneal neutrophils from Alkbh5-deficient mice (Alkbh5-/-) and Wild-type littermates (Alkbh5+/+) at 12h or 36h after mild cecal ligation and puncture (CLP), respectively, we want to identify potential targets of ALKBH5 and characterize the transcriptional landscape in neutrophils during antibacterial innate defense. Gene Ontology biological processes enrichment analysis of the significantly differentially expressed genes (DEGs) showed that neutrophil migration made up the most significantly enriched biological processes with annotations of neutrophil association upon loss of ALKBH5 in neutrophils, at both 12h and 36h after CLP. Many significantly DEGs also encompassed transcriptional signatures related to neutrophils, specifically to neutrophil influx into the infection site, including chemotaxis, response to chemokine, extravasation, ERK1 and ERK2 cascade, homeostasis of neutrophils. ALKBH5 deletion led to significantly decreased transcript expression of neutrophil migration-promoting Cxcr2 and Nlrp12; while increased transcript expression of neutrophil migration-suppressive Ptger4, Tnc, and Wnk1. These results demonstrated that ALKBH5 imprints migration-promoting transcriptional landscape in neutrophils to enable their migration into the site of infection for antibacterial innate defense.
2022-05-24 | GSE198316 | GEO
Project description:By performing RNA-seq analysis on ALKBH5-deficient (ALKBH5-/-, KO) and Wild-type (WT) dHL-60 human neutrophils infected with Escherichia coli, we want to investigate the effect of ALKBH5 on transcriptional landscape of human neutrophils during bacterial infection. Then, we performed gene expression profiling and Gene Ontology enrichment analysis of the significantly differentially expressed genes using data obtained from RNA-seq.
2023-12-21 | GSE224650 | GEO
Project description:Effect of depletion of ALKBH5 on transcriptional landscape in bone marrow neutrophils from septic mice
| PRJNA934493 | ENA
Project description:Neutrophils are critical for effective anti-fungal immune responses. However, in fungal sepsis neutrophils undergo a phenotypical (Ly6G downregulation) and functional alteration (defective ROS production), impairing their anti-fungal capacity. Therefore we wish to characterize the neutrophils in septic mice transcriptionally to describe their role in driving sepsis. We included several control groups. Mice that lack T cells (TCRaKO mice) have increased resistance to the infection and their neutrophils appear unaltered. We identified G-CSF and DNA/histones to be responsible for affecting granulopoiesis, as rG-CSF and Clodronate liposomes combined expand Ly6Glow neutrohils in naive mice.
2021-10-01 | GSE160301 | GEO
Project description:The wide array of molecules carried by plasma regulates critical immune functions and constitutes valuable biomarkers and therapeutic targets. In recent years the introduction of “systems approaches” has provided investigators with powerful means for assessing immune responses in patient samples on a global scale. However, while the use of genome-wide profiling technologies has become widespread, measuring the plasma proteome still presents considerable challenges. An alternative approach that consists in measuring transcriptome responses in reporter cells exposed in vitro to patient plasma has been successfully employed in a limited number of studies. Here we devised such a “Transcriptomic Reporter Assay” system to assess the immunogenicity of plasma from septic patients and evaluate its potential for biomarker discovery. Sepsis is a common, severe systemic infectious process for which physicians still lack efficient diagnostic or prognostic tools. Of the three different cell reporter systems tested, neutrophils were identified as the most capable “plasma sensor”. Compared to peripheral blood mononuclear cells and dendritic cell preparations neutrophils were best able to discriminate between plasma from septic and control subjects and responded by upregulating a robust immune transcriptional program. Additionally, the amplitude of the neutrophil transcriptomic response was shown to be associated with disease severity in two additional sets of patients. Overall, our results demonstrate both the suitability and potential clinical relevance of a neutrophil reporter assay for assessing immunopathogenic processes in a complex and severe condition such as sepsis. Polymorphonuclear neutrophils (PMNs) were isolated from two healthy donors. Plasma samples were obtained from patients with culture-confirmed sepsis (n=12) and from uninfected controls (n=12). PMNs were cultured for 6 hours in medium alone, plasma from patients with sepsis, plasma from uninfected controls, and LPS using a final concentration of 20%. Transcriptional profiles were acquired using Illumina HumanHT12 V4 BeadChips.
2014-03-17 | E-GEOD-49755 | biostudies-arrayexpress
Project description:N6-methyladenosine (m6A) is the most prevalent internal modification of messenger RNA (mRNA) in higher eukaryotes. Here we report ALKBH5 as a new mammalian demethylase that oxidatively removes the m6A modification in mRNA in vitro and inside cells. This demethylation activity of ALKBH5 significantly affects mRNA export and RNA metabolism as well as the assembly of mRNA processing factors in nuclear speckles. Alkbh5-deficient male mice are characterized by impaired fertility resulting from apoptosis that affects meiotic metaphase-stage spermatocytes. In accordance with this defect, we have identified in mouse testes 1552 differentially expressed genes which cover broad functional categories and include spermatogenesis-related mRNAs involved in the p53 functional interaction network. We show that Alkbh5-deficiency impacts the expression levels of some of these mRNAs, supporting the observed phenotype. The discovery of this new RNA demethylase strongly suggests that the reversible m6A modification plays fundamental and broad functions in mammalian cells. RNA-seq in two cell types
2013-02-15 | E-GEOD-40132 | biostudies-arrayexpress
Project description:The wide array of molecules carried by plasma regulates critical immune functions and constitutes valuable biomarkers and therapeutic targets. In recent years the introduction of “systems approaches” has provided investigators with powerful means for assessing immune responses in patient samples on a global scale. However, while the use of genome-wide profiling technologies has become widespread, measuring the plasma proteome still presents considerable challenges. An alternative approach that consists in measuring transcriptome responses in reporter cells exposed in vitro to patient plasma has been successfully employed in a limited number of studies. Here we devised such a “Transcriptomic Reporter Assay” system to assess the immunogenicity of plasma from septic patients and evaluate its potential for biomarker discovery. Sepsis is a common, severe systemic infectious process for which physicians still lack efficient diagnostic or prognostic tools. Of the three different cell reporter systems tested, neutrophils were identified as the most capable “plasma sensor”. Compared to peripheral blood mononuclear cells and dendritic cell preparations neutrophils were best able to discriminate between plasma from septic and control subjects and responded by upregulating a robust immune transcriptional program. Additionally, the amplitude of the neutrophil transcriptomic response was shown to be associated with disease severity in two additional sets of patients. Overall, our results demonstrate both the suitability and potential clinical relevance of a neutrophil reporter assay for assessing immunopathogenic processes in a complex and severe condition such as sepsis. Polymorphonuclear neutrophils (PMNs) were isolated a healthy donor. Plasma samples were obtained from a first set of patients with culture-confirmed sepsis (n=29) and from uninfected controls (n=17). PMNs were cultured for 6 h in medium alone, plasma from patients with sepsis, plasma from uninfected controls, and LPS using a final concentration of 20%. Transcriptional profiles were acquired using Illumina HumanHT12 V4 BeadChips.
2014-03-17 | E-GEOD-49756 | biostudies-arrayexpress
Project description:The wide array of molecules carried by plasma regulates critical immune functions and constitutes valuable biomarkers and therapeutic targets. In recent years the introduction of âsystems approachesâ has provided investigators with powerful means for assessing immune responses in patient samples on a global scale. However, while the use of genome-wide profiling technologies has become widespread, measuring the plasma proteome still presents considerable challenges. An alternative approach that consists in measuring transcriptome responses in reporter cells exposed in vitro to patient plasma has been successfully employed in a limited number of studies. Here we devised such a âTranscriptomic Reporter Assayâ system to assess the immunogenicity of plasma from septic patients and evaluate its potential for biomarker discovery. Sepsis is a common, severe systemic infectious process for which physicians still lack efficient diagnostic or prognostic tools. Of the three different cell reporter systems tested, neutrophils were identified as the most capable âplasma sensorâ. Compared to peripheral blood mononuclear cells and dendritic cell preparations neutrophils were best able to discriminate between plasma from septic and control subjects and responded by upregulating a robust immune transcriptional program. Additionally, the amplitude of the neutrophil transcriptomic response was shown to be associated with disease severity in two additional sets of patients. Overall, our results demonstrate both the suitability and potential clinical relevance of a neutrophil reporter assay for assessing immunopathogenic processes in a complex and severe condition such as sepsis. Polymorphonuclear neutrophils (PMNs) were isolated a healthy donor. Plasma samples were obtained from a first set of patients with culture-confirmed sepsis (n=35) and from uninfected controls (n=19). PMNs were cultured for 6 h in medium alone, plasma from patients with sepsis, plasma from uninfected controls, and LPS using a final concentration of 20%. Transcriptional profiles were acquired using Illumina HumanHT12 V4 BeadChips.
2016-08-11 | E-GEOD-49757 | biostudies-arrayexpress
Project description:Severe infections and sepsis is an increasing clinical problem that cause prolonged morbidity and substantial mortality. At present, antibiotics are essentially the only pharmacological treatment for sepsis. The incidence of antibiotic resistance is increasing and it is therefore critical to find new therapies for sepsis. Staphylococcus aureus (S. aureus) is a major cause of septic mortality. Neutrophils play a major role in defense against bacterial infections. We have recently shown that a saturated high fat diet decreases survival in septic mice, but the mechanisms behind remain elusive. The aim of the present study was to investigate how the dietary fat composition affects survival and neutrophils function after experimental septic infection in mice. We found that, after S. aureus infection, mice fed polyunsaturated high fat diet (HFD/P) for 8 weeks had increased septic survival and decreased bacterial load compared with mice fed saturated HFD (HFD/S), and similar to that of mice given low fat diet (LFD). Furthermore, uninfected mice fed HFD/P had increased number of Ly6G+ neutrophils in bone marrow. In addition, mice fed HFD/P had a higher number Ly6G+ neutrophils recruited to the site of inflammation after peritoneal injection of thioglycollate. In conclusion, polyunsaturated dietary fat increased both survival and the efficiency of the bacterial clearance during septic S. aureus infection. Moreover, this diet enhanced the number and chemotaxis of neutrophils, a key component of the immune response to S. aureus infections. Mice (non-infected) fed saturated high fat diet, low fat diet, or polyunsaturated high fat diet
2014-11-24 | E-GEOD-58358 | biostudies-arrayexpress
Project description:The wide array of molecules carried by plasma regulates critical immune functions and constitutes valuable biomarkers and therapeutic targets. In recent years the introduction of “systems approaches” has provided investigators with powerful means for assessing immune responses in patient samples on a global scale. However, while the use of genome-wide profiling technologies has become widespread, measuring the plasma proteome still presents considerable challenges. An alternative approach that consists in measuring transcriptome responses in reporter cells exposed in vitro to patient plasma has been successfully employed in a limited number of studies. Here we devised such a “Transcriptomic Reporter Assay” system to assess the immunogenicity of plasma from septic patients and evaluate its potential for biomarker discovery. Sepsis is a common, severe systemic infectious process for which physicians still lack efficient diagnostic or prognostic tools. Of the three different cell reporter systems tested, neutrophils were identified as the most capable “plasma sensor”. Compared to peripheral blood mononuclear cells and dendritic cell preparations neutrophils were best able to discriminate between plasma from septic and control subjects and responded by upregulating a robust immune transcriptional program. Additionally, the amplitude of the neutrophil transcriptomic response was shown to be associated with disease severity in two additional sets of patients. Overall, our results demonstrate both the suitability and potential clinical relevance of a neutrophil reporter assay for assessing immunopathogenic processes in a complex and severe condition such as sepsis. Peripheral blood mononuclear cells (PBMCs) were isolated from two healthy donors. Plasma samples were obtained from patients with culture-confirmed sepsis (n=12) and from uninfected controls (n=12). PBMCs were cultured for 6 h in medium alone, plasma from patients with sepsis, plasma from uninfected controls, and LPS using a final concentration of 20%. Transcriptional profiles were acquired using Illumina HumanHT12 V4 BeadChips.
2014-03-17 | E-GEOD-49754 | biostudies-arrayexpress