Project description:Human subjects were vaccinated with seasonal influenza vaccine at day 0 (TIV, 2014-2015). A subgroup of subjects (abx) received an additional oral antibiotic regimen, consisting of neomycin, vancomycin, and metronidazole, between days -3 and 1. CD14+ monocytes, mDCs, and pDCs were isolated from PBMCs of vaccinated subjects (3 antibiotic treated, 5 controls) at day -21 (BL), 0 and 30 using FACS. ATAC-seq was used to analyze the chromatin accessibility landscape in these cells.
Project description:Epigenome-wide association study (EWAS) of oral rinse samples from a case-control study of 154 cases and 72 controls. The Illumina Infinium HumanMethylation450 Beadchip was used to obtain DNA methylation profiles across approximately 450,000 CpGs in oral rinse samples.
Project description:Human subjects were vaccinated with seasonal influenza vaccine at day 0 (TIV, 2014-2015). A subgroup of subjects (abx) received an additional oral antibiotic regimen, consisting of neomycin, vancomycin, and metronidazole, between days -3 and 1. CD14+ monocytes were isolated from PBMCs of vaccinated subjects (2 antibiotic treated, 3 controls) at day 0 and 30 using FACS. RNA-seq was used to analyze the transcriptional landscape in these cells.
2021-06-25 | GSE166063 | GEO
Project description:Oral Antibiotic Microbiome
| PRJNA641924 | ENA
Project description:Study of microbiota in human oral
Project description:Periodontitis is increasingly linked to diverse brain disorders, yet causal mechanisms remain elusive. Here we demonstrate that ligature-induced oral dysbiosis in mice is sufficient to perturb central function. Six weeks of periodontitis produced anxiety-like behavior and motor deficits, accompanied by microglial depletion, reduced neuronal activity and region-selective transcriptional down-regulation in the frontal cortex. Pharmacological microglial ablation phenocopied, and glucocorticoid-receptor blockade rescued, these abnormalities, implicating microglia and activation of the hypothalamic–pituitary–adrenal axis. 16S rRNA gene sequencing revealed significant shifts in oral and gut microbiota that were partially normalized by a broad-spectrum antibiotic cocktail. Antibiotics alone elevated corticosterone but did not affect microglia or behavior, indicating that dysbiosis and glucocorticoids act synergistically on the brain dysfunction. Antibiotic treatment restored microglial density and behaviors in ligature mice, despite plasma corticosterone levels remaining elevated and comparable to those in antibiotic-treated controls. Our findings suggest oral dysbiosis as a tractable driver of neuroimmune dysfunction and redefine periodontitis as a systemic disorder with direct consequences for brain health.
Project description:Periodontitis is increasingly linked to diverse brain disorders, yet causal mechanisms remain elusive. Here we demonstrate that ligature-induced oral dysbiosis in mice is sufficient to perturb central function. Six weeks of periodontitis produced anxiety-like behavior and motor deficits, accompanied by microglial depletion, reduced neuronal activity and region-selective transcriptional down-regulation in the frontal cortex. Pharmacological microglial ablation phenocopied, and glucocorticoid-receptor blockade rescued, these abnormalities, implicating microglia and activation of the hypothalamic–pituitary–adrenal axis. 16S rRNA gene sequencing revealed significant shifts in oral and gut microbiota that were partially normalized by a broad-spectrum antibiotic cocktail. Antibiotics alone elevated corticosterone but did not affect microglia or behavior, indicating that dysbiosis and glucocorticoids act synergistically on the brain dysfunction. Antibiotic treatment restored microglial density and behaviors in ligature mice, despite plasma corticosterone levels remaining elevated and comparable to those in antibiotic-treated controls. Our findings suggest oral dysbiosis as a tractable driver of neuroimmune dysfunction and redefine periodontitis as a systemic disorder with direct consequences for brain health.
