Project description:We used H4K5bu and H4K5ac antibodies to specifically enrich mouse hippocampal neuronal cells (HT22) before and after BHBA administration. We found that the acetylation and butylation of histone H4K5 play a key role in the neuroprotection of BHBA.
Project description:To investigate the changes of the transcriptome in neuronal cells under the condition of NMDAR hypofunction and H/R injury, we compared the changes of mRNA and lncRNA expression levels in mouse hippocampal neuron HT22 cell with or without NMDAR knockdown and H/R stimulation by RNA sequencing.
Project description:The Neurotrophic Compound J147 Reverses Cognitive Impairment In Aged Alzheimer's Disease We used GeneChipM-BM-. Mouse Genome 430 2.0 Arrays to probe global gene expression changes when adding J147 compound to HT22 cells and compared to untreated cells. The hippocampal cell line HT22 were treated with the J147 compound for 1 hour and compared to HT22 treated only with vehicle (DMSO) for 1 hour. The gene expression profile from the J147-treated HT22 cells (1 hour exposure) was compared to HT22 cells treated with vehicle only (DMSO) for 1 hour. The DMSO/vehicle treated cells serve as the control and are referred to as untreated with drug.
Project description:The Neurotrophic Compound J147 Reverses Cognitive Impairment In Aged Alzheimer's Disease We used GeneChip® Mouse Genome 430 2.0 Arrays to probe global gene expression changes when adding J147 compound to HT22 cells and compared to untreated cells. The hippocampal cell line HT22 were treated with the J147 compound for 1 hour and compared to HT22 treated only with vehicle (DMSO) for 1 hour.
Project description:Ketone 3-hydroxybutyrate (3OHB) has been proved to be a neuroprotective endogenous molecule in multiple neurodegenerative diseases, but the detailed mechanisms of action has not been fully uncovered. Here, we employed a quantitative proteomics approach to assess the global protein expression pattern of neuron cells which were incorporated with 3OHB. While 3OHB did not derive dramatic proteome pattern fluctuation in HT22 cells, a big portion of the proteome alteration are found to be 3OHB specific responses (including: cell metabolism, protein acetylation, cognition, neurodegeneration diseases). Combining with disease related protein-protein interaction network analysis, we successfully pinpointed a hub marker, Histone lysine 27 trimethylation (H3K27me3), which has been widely studied in multiple neurodegenerative diseases, but still hasn’t been connected to 3OHB derived neuroprotective effects yet. In addition, our data suggested that the co-occurrence of H3K4me3 and H3K27me3 which was defined as chromatin bivalency referring “poised” transcriptional state could be perturbed by 3OHB, since both H3K4me3 and H3K27me3 were showing sensitive response to 3OHB. Integrative transcriptomics and epigenomics analysis highlighted bivalent transcription factors may play critical roles in 3OHB derived disease protection and alteration of neuronal development processes. To further validate and explore the possible scenario, we performed transcriptomics profiling of 3OHB perturbation upon neural differentiation process. The gene set enrichment analysis has shown that 3OHB could impair the fate decision of neural precursor cells by repressing and promoting their differentiation and proliferation related biological processes, respectively. Another interesting phenomenon is that two of relative high abundant Histone lysine hydroxybutyrylation sites (H2AK118bhb, H2BK34bhb) also responded to 3OHB fulguration. Those two sites are happen to be the most important monoubiquitylation sites that play critical role in regulating of H3K27 methylation and H3K4 (and K79) methylation, respectively. One may speculate that H2AK118bhb and H2BK34bhb involve in or even derive chromatin bivalency alteration upon 3OHB perturbation in neural systems.Taking together, our study provides a novel scenario for deciphering the 3OHB and its mechanisms of action in neural systems both in neurodegeneration disease pathogenesis and neural development process.
Project description:We conducted genome-wide analysis of KMT2D binding sites in a hippocampal cell line to define KMT2D-dependent functions in neuronal context
Project description:Astrocytes can support neuronal survival through a range of secreted signals that protect against neurotoxicity, oxidative stress, and apoptotic cascades. To identify proteins contributing to protective intracellular neuronal signalling originating from astrocytes, endogenous PI3K was immunoprecipitated from Ht22 cells exposed to primary astrocyte conditioned media (ACM) or cell free media (CFM), followed by iTRAQ-based quantitative proteomic analysis.
Project description:We conducted genome wide transcription profiling by RNA-seq in a mouse hippocampal cell line (HT22), comparing cells with CRISPR-Cas9 mediated deletion of the KMT2D enzymatic SET methyltransferase domain to the parental cell line