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Complement factor C1q mediates sleep spindle disruption and epileptic spikes after mild brain injury

ABSTRACT: Complement factor C1q mediates sleep spindle disruption and epileptic spikes after mild brain injury

PROVIDER: PRJNA744171 | ENA |

REPOSITORIES: ENA

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Complement factor C1q mediates sleep spindle disruption and epileptic spikes after mild brain injury

Project description:While traumatic brain injury (TBI) acutely disrupts the cortex, most TBI-related disabilities reflect secondary injuries that accrue over time. The thalamus is a likely site of secondary damage because of its reciprocal connections with the cortex. Using a mouse model of mild cortical injury that does not directly damage subcortical structures (mTBI), we found a chronic increase in C1q expression specifically in the corticothalamic circuit. Increased C1q expression co-localized with neuron loss and chronic inflammation, and correlated with disruption in sleep spindles and emergence of epileptic activities. Blocking C1q counteracted these outcomes, suggesting that C1q is a disease modifier in mTBI. Single-nucleus RNA sequencing demonstrated that microglia are the source of thalamic C1q. Since the corticothalamic circuit is important for cognition and sleep, which can be impaired by TBI, this circuit could thus be a new target for treating TBI-related disabilities.

2021-09-14 | GSE179541 | GEO

Complement factor C1q mediates sleep spindle loss and epileptic spikes after mild brain injury.

Project description: Not available

| S-EPMC8750918 | biostudies-literature

Modulation of gene expression by complement protein C1q in amyloid-beta injured neurons

Project description:Complement protein C1q is induced after injury in the brain and during Alzheimer's disease and has been shown to protect against amyloid-beta induced neuronal death. In this study, we used microarray approach to identify the pathways modulated by C1q that are associated with neuroprotection. Immature rat cortical primary neurons are treated with fibrillar amyloid-beta peptides and/or C1q for 3h before RNA extraction and hybridization on rat Affymetrix microarrays. Supplementary file: Processed/normalized, probe-level signal intensities from neurons treated with amyloid-beta or C1q. Median signal intensity used as global normalization method, done with JMP genomics (v5.0) software.

2012-12-21 | E-GEOD-28886 | biostudies-arrayexpress

Regulation of neuronal gene and miRNA expression by the complement protein C1q associated with neuroprotection

Project description:Identification of transcriptional profiles stimulated by the complement protein C1q in rat immature neurons associated with the C1q-dependent neuroprotection observed in vitro. Use of the unbiased whole genome microarray approach to identify genes regulated by C1q. Immature neurons grown in vitro for 3 days were stimulated with 10 nM C1q for 3h.

2011-03-07 | E-GEOD-18860 | biostudies-arrayexpress

Regulation of neuronal gene and miRNA expression by the complement protein C1q associated with neuroprotection

2011-03-07 | GSE18860 | GEO

Modulation of gene expression by complement protein C1q in amyloid-beta injured neurons

2012-12-21 | GSE28886 | GEO

Complement protein C1q modulates macrophage molecular signaling and inflammatory responses during ingestion of atherogenic lipoproteins

Project description:C1q suppresses JAK-STAT signal transduction and activates PPAR-mediated transcription in macrophages during clearance of modified forms of LDL leading to a reduction in inflammatory response. Human monocyte-derived macrophages (HMDM) were incubated with either oxidized (oxLDL) or acetylated low-density lipoprotein (acLDL) in the presence or absence of C1q for 3 hours. Total RNA was extracted using the Qiagen RNeasy Mini Kit. RNA libraries were constructed using the Illumina TruSeq Stranded mRNA Sample Preparation Kit. Sequences were aligned to a reference genome (hg38), RPKM and raw counts were determined using CASAVA version 1.8.2.

2016-08-25 | E-GEOD-80442 | biostudies-arrayexpress

Complement protein C1q modulates macrophage activation and inflammasome activity during the uptake of apoptotic cells

Project description:In this study, we developed a unique system using primary human autologous lymphocytes and HMDMs to characterize the effect of C1q on macrophage gene expression profiles during the uptake of apoptotic cells. Our results showed that C1q bound to autologous apoptotic lymphocytes (AL) significantly modulated the response of HMDMs to LPS by increasing expression of cytokines, chemokines and effector molecules associated with immunoregulation and by directly suppressing caspase-1 dependent cleavage of IL-1beta.

2012-05-02 | GSE30177 | GEO

C1q elicited macrophage gene expression

Project description:We have data from a previous microarray experiment which shows that C1q elicits macrophages to express genes important for clearance of dead (apoptotic) cells. In this experiment we want to determine the signaling mechanism by which C1q is turning on macrophage gene expression. For our control (sample 1-3) we heated C1q to denature it so it is inactive. We also want to know which portion of C1q is responsible for activation the macrophage so we generated C1qtails (samples 4-5). We also have macrophages treated with the whole C1q molecule (7-9). And finally we have a cell line (J774) treated with C1q but does not activate the cells (samples 10-12). Bone marrow derived macrophages or J774 cells were adhered to heat inactivated C1q, C1q tails or C1q for 18 hours. Cells were harvested and RNA was isolated and converted to double stranded cDNA and subsequently labeled and hybridized onto NimbleGen mouse gene expression array [100718_MM9_EXP] using Nimblegen Hybridization system 4 according to manufacturerM-bM-^@M-^Ys instructions (Roche)

2014-07-10 | E-GEOD-48619 | biostudies-arrayexpress

Complement protein C1q modulates macrophage molecular signaling and inflammatory responses during ingestion of atherogenic lipoproteins

2016-08-25 | GSE80442 | GEO

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