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SRX11358755: GSM5419300: Brd4-CUT&Tag in naïve CD8+T cells_rep2; Mus musculus; OTHER
1 ILLUMINA (Illumina HiSeq 2500) run: 4.8M spots, 1.4G bases, 500.5Mb downloads

Submitted by: NCBI (GEO)
Study: Brd4 regulates the homeostasis of CD8+ T-lymphocytes and their proliferation in response to antigen stimulation [Cut&Tag]
show Abstracthide Abstract
CD8+ T cells are major components of adaptive immunity and confer robust protective cellular immunity, which requires adequate T-cell numbers, targeted migration, and efficient T-cell proliferation. Altered CD8+ T-cell homeostasis and impaired proliferation result in dysfunctional immune response to infection or tumorigenesis. However, intrinsic factors controlling CD8+ T-cell homeostasis and immunity remain largely elusive. Here, we demonstrate the prominent role of Brd4 on CD8+ T cell homeostasis and immune response. By upregulating Myc and GLUT1 expression, Brd4 facilitates glucose uptake and energy production in mitochondria, subsequently supporting naïve CD8+ T-cell survival. Besides, Brd4 promotes the trafficking of naïve CD8+ T cells partially through maintaining the expression of homing receptors (CD62L and LFA-1). Furthermore, Brd4 is required for CD8+ T cell response to antigen stimulation, as Brd4 deficiency leads to a severe defect in clonal expansion by decreasing glycolysis. Importantly, as JQ1, the specific inhibitor of Brd4, severely dampens CD8+ T-cell immune response, its usage as an anti-tumor agent or latency-reversing agent for human immunodeficiency virus type I (HIV-1) should be more cautious. Collectively, our study identifies a previously-unexpected role of Brd4 in the metabolic regulation of CD8+ T cell-mediated immune surveillance and also provides a potential immunomodulation target. Overall design: Examination of Brd4' binding sites throughout the genome in mouse naïve CD8+T cells.
Sample: Brd4-CUT&Tag in naïve CD8+T cells_rep2
SAMN20066132 • SRS9405228 • All experiments • All runs
Organism: Mus musculus
Library:
Instrument: Illumina HiSeq 2500
Strategy: OTHER
Source: GENOMIC
Selection: other
Layout: PAIRED
Construction protocol: Fifty-thousand isolated CD8+ T cells were used to generate CUT&Tag library as a reference[31]. First, CD8+ T cell was incubated with primary antibody against Brd4 (1:50; Active motif AB_2615059) and then with guinea pig anti-rabbit secondary antibody (1:100; Antibodies Online ABIN101961). This was followed by adding the prepared pA-Tn5 complex. Next, DNA was fragmented by Mg2+ activator and the resulting DNA segments were extracted to amplify with PCR. Finally, PCR products were cleaned up and sequenced. Paired-end 150-bp sequencing was performed on an Illumina HiSeq 2500. Each DNA library for CUT&Tag was sequenced with HiSeq 2500 system (Illumina, USA) under the paired-end 150 bp mode. For data processing, raw sequencing data were trimmed and filtered by using Trim Galore. The paired-end reads with high quality (Q30) were aligned to the mouse reference genome mm10 using the Burrows Wheeler Aligner with default parameters and then sorted using the SAMtools software. The “MarkDuplicates” function embedded in Picard was used to mark and discard PCR duplicates. For comparison between different samples, mapped reads were down-sampled to equalize reads across samples by using Samtools. MACS2 was used to quantify the Brd4 CUT&Tag signal throughout the genome and within gene bodies.
Experiment attributes:
GEO Accession: GSM5419300
Links:
Runs: 1 run, 4.8M spots, 1.4G bases, 500.5Mb
Run# of Spots# of BasesSizePublished
SRR150481444,823,0981.4G500.5Mb2021-09-16

ID:
15179043

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