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SRX13790829: GSM5819422: Peripheral T cells of patinet #12 before TTF treatment; Homo sapiens; RNA-Seq
1 ILLUMINA (Illumina NovaSeq 6000) run: 74.6M spots, 22.5G bases, 7Gb downloads

External Id: GSM5819422_r1
Submitted by: Neurosurgery, University of Florida
Study: TTFields treatment effects on newly diagnosed Glioblastoma patients in peripheral T lymphocytes
show Abstracthide Abstract
We report the application of RNA-based sequencing technology for high-throughput profiling of T cell enriched peripheral blood mononuclear cells. By sequencing in total of 12 pairs GBM patient samples, we extracted TCRaß V(D)J sequences from the deep RNA-seq of T cells isolated from the 24 PBMCs to determine if TTFields treatment affected TCR diversity, using the Simpson's diversity index (DI), which is the average proportional abundance of TCR clones based on the weighted arithmetic mean. Of the 12 patients, 9 exhibited negative log fold change (logFC) of TCR DI after TTFields, indicating clonal expansion. Notably, in all but 1 patient, the top 200 most abundant clones post TTFields, which accounted for 38.1% to 100% (median 67%) of detectable clones, showed substantial expansion compared to pre-TTFields T cells, and inversely correlated with the DI. Thus, TTFields treatment is associated with adaptive immune activation as evidenced by clonal expansion of peripheral T cells. Overall design: Examination of TTFields treatment effects in T cell enriched peripheral blood mononuclear cells.
Sample: Peripheral T cells of patinet #12 before TTF treatment
SAMN25002996 • SRS11673371 • All experiments • All runs
Organism: Homo sapiens
Library:
Name: GSM5819422
Instrument: Illumina NovaSeq 6000
Strategy: RNA-Seq
Source: TRANSCRIPTOMIC
Selection: cDNA
Layout: PAIRED
Construction protocol: Frozen PBMC samples were quickly taken from liquid nitrogen and thaw at 37 degree. T lymphcytes were isolated using Pan T Cell Isolation Kit, human (Miltenyi Cat#130-096-535), and the total RNA was extracted using Qiagen RNA extraction kit. RNA-seq library performed at ICBR Gene Expression & Genotyping (RRID:SCR_019145) using 25 ng of protein-free, DNase-treated total RNA (each sample processed individually) as input. Briefly, 25ng of total RNA was used for mRNA isolation using NEBNext Ploy(A) mRNA Magnetic Isolation module (New England Biolabs, catalog # E7490 ). Then followed by RNA library construction with NEBNext Ultra II Directional Lib Prep (New England Biolabs, catalog #E7760) according to the manufacturer's user guide. Briefly, RNA is fragmented in NEBNext First Strand Synthesis Buffer by heating at 94 °C for desired time. This step is followed by first strand cDNA synthesis using reverse transcriptase and oligo dT primers. Synthesis of ds cDNA is performed using the 2nd strand master mix provided in the kit, followed by end-repair and adaptor ligation. Finally, library is enriched (each library has an unique barcode) by 12 cycles of amplification, and purified by Agencourt AMPure beads (Beckman Coulter, catalog # A63881).
Runs: 1 run, 74.6M spots, 22.5G bases, 7Gb
Run# of Spots# of BasesSizePublished
SRR1762239874,635,44722.5G7Gb2022-04-20

ID:
19185593

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