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Glial immune-related pathways as mediators of closed head TBI effects on behavior and lethality in Drosophila

ABSTRACT: Glial immune-related pathways as mediators of closed head TBI effects on behavior and lethality in Drosophila

PROVIDER: PRJNA690250 | ENA |

REPOSITORIES: ENA

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Project description:We applied TRAP-seq to adult flies expressing GFP tagged Rpl10 in the glial cells (with Repo-Gal4) to look for genes whose translation are affect at different time points after recieving TBI

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Hippocampus-Cerebellum Axis Specific Transcriptomic Stratification to Discriminate Mild from Moderate TBI

Project description:The variations of psycho- and physiological deficits caused by TBI correlate with the degree of brain injury. However, the objective stratification of TBI is yet elusive. A modified closed-head injury Marmarou model was used based on the release of a 500 gram steel slug on top of the rat skull from a height of 100 cm or 120 cm to induce differential injury models for mild TBI and moderate TBI, respectively. The skull was covered by a helmet to mimic the warfighter’s condition in theater. The hippocampus was at the focal point of injury, and the cerebellum, was susceptible to diffused shock (secondary injury). The HC-CB axis coordinates visuomotor performance, which is known to be vulnerable to TBI. The rats that received moderate TBI showed deficient visuomotor performance by the Barnes maze test for longer time periods than those inflicted with mild TBI. The time resolved and HC-CB specific transcriptomic analysis focused on genes that enabled discrimination of mild from moderate TBI at 14d post injury which is equivalent to nearly 1.5 years of human lifetime. The functional analysis elucidated an active healing mechanism in the HC exposed to mild TBI. In contrast, moderate TBI caused delayed healing and active cell death in the HC. In conclusion, the graded brain injuries differentially implicated the HC-CB axis, despite the use of a helmet to reduce the impact. Time resolved functional dynamics informed the distinct consequences of mild vs. moderate TBI.

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Project description:Tissue damage precedes GvHD and the events leading up to this inflammatory disease are not well understood. To identify cell populations that may invade the intestinal tract after total body irradiation (TBI), we performed a microarray based gene expression analysis of the intestinal tract isolated from untreated mice or mice that had received 9 Gray TBI 24 h or 48 h previously. The aim of the microarray based gene expression analysis was to identify genes specific for certain cell populations that may contribute to GvHD.

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Project description:Using 10x Genomics' single-cell RNA-seq (scRNA-seq) technology, we profiled expression of genes in cell type-specific MAGL knockout mice that received TBI. We found that there are differences in expression of genes between WT, tKO, nKO, and aKO mice in sham or TBI.

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Expression data from chemokine-deficient mus musculus subjected to traumatic brain injury (TBI)

Project description:We inflicted TBI to chemokine-deficient mouse lines in order to establish involvement of various signalling pathways that may be addressed therapeutically. Interacting chemokine pathways in brain regulate distinct inflammatory cells. Activated microglia are separate from invading phagocytes and dendritic cells. Findings show potential targets to interfere with specific inflammatory responses after brain injury. TBI was carried out in Ccl3-/- and Ccr2-/- mice, total RNA prepared from injured cerebral neocortex after three days. RNA samples were from uninjured Ccl3-/- and Ccr2-/- mice as reference for hybridization on Affymetrix microarrays.

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