NCBI Logo
GEO Logo
   NCBI > GEO > Accession DisplayHelp Not logged in | LoginHelp
GEO help: Mouse over screen elements for information.
          Go
Sample GSM2871540 Query DataSets for GSM2871540
Status Public on Aug 03, 2018
Title Undifferentiated Ctrl sgRNA 3
Sample type SRA
 
Source name U937 cell line
Organism Homo sapiens
Characteristics protocol: Undifferentiated Ctrl sgRNA
cell line: U937
Treatment protocol For differentiation, U937 cells were diluted to a density of 1-2 million cells per mL in U937 growth medium containing phorbol myristate acetate (PMA) to achieve a final concentration of 50 nM PMA. Cells were plated on tissue culture plastic and allowed to differentiate and adhere for 3 days. After differentiation, cells were recovered by harvesting supernatants and trypsinizing adherent cells. For trypsinization, cells were washed three times with phosphate buffered saline (PBS; 137 mM NaCl, 2.7 mM KCl, 8 mM sodium phosphate dibasic, 2 mM potassium phosphate monobasic, pH 7.4), incubated in PBS containing 300 units/mL trypsin for 7 min at 37°C, then recovered from the plate by repeatedly pipetting the solution to dislodge cells. Trypsinized adherent and non-adherent supernatant cells were pooled, pelleted by centrifugation (300g, 7 min, room temperature), and resuspended in fresh U937 growth medium. Cells were then plated and allowed to recover for two days before further processing.
Growth protocol U937 cells were acquired from ATCC (CRL-1593.2). Cells were maintained in suspension culture using spinner flasks for library propagation and tissue culture plates for single-gene knockout lines, all in sterile-filtered U937 growth medium (RPMI1640 supplemented with 2 mM glutamine, 100 units/mL penicillin, 100 mg/mL streptomycin, and 10% heat-inactivated fetal calf serum). Cells were cultured in a humidified 37°C incubator set at 5% CO2. Cells were passaged 2-3 times weekly.
Extracted molecule total RNA
Extraction protocol Differentiated and undifferentiated U937 cells were seeded at a density of 50,000 cells per well in a 24-well plate. Two days later, cells were lysed in RLT buffer and RNA was isolated using the RNeasy Micro Kit (Qiagen).
cDNA libraries were prepared and adapted for sequencing using a modified Smart-seq2 protocol (Picelli et al., 2014). In short, 10 ng of purified RNA was mixed with RNase Inhibitor, Oligo-dT30 primer, and dNTPs and heat-denatured before addition to a SuperScriptII template-switching reverse transcription reaction mixture. cDNA was amplified in a 12-cycle KAPA HiFi HotStart PCR reaction and purified using Ampure XP SPRI beads. 0.5 ng of cDNA was fragmented for sequencing using the Nextera XT DNA sample preparation kit. After tagmentaion and amplification of adapter-ligated, indexed fragments, DNA was purified using Ampure XP SPRI beads and sequenced on a NextSeq 550 (Illumina) to obtain 75 bp paired-end reads.
 
Library strategy RNA-Seq
Library source transcriptomic
Library selection cDNA
Instrument model NextSeq 550
 
Description U_CTRL_3
Data processing RNA-seq data was mapped to the human genome annotation hg38 using HISAT2 version 2.0.3 (Kim et al., 2015) via the Galaxy platform (https://usegalaxy.org/) (Afgan et al., 2016), resulting in 8 to 12 million mapped reads per sample. Transcript FPKM (fragments per kilobase of transcript sequence per million mapped fragments) scores were obtained using Cufflinks version 2.2.1 (Trapnell et al., 2010) with the iGenomes hg38 gtf file as a reference annotation.
The counts and FPKM tables do not contain processed data for D_GFP_1. This was omitted due to a processing error and was left out of the analysis.
Genome_build: hg38
Supplementary_files_format_and_content: CBMH2_Counts_GEO.xlsx and CBMH2_FPKM_GEO.xlsx contain counts from DESeq2 and FPKM values from Cufflinks respectively
 
Submission date Dec 01, 2017
Last update date May 15, 2019
Contact name Christopher John Bohlen
E-mail(s) bohlenc@gene.com
Organization name Genentech
Department Neuroscience
Lab Bohlen
Street address Room 15-2006, Genentech Building 15
City South San Francisco
State/province CA
ZIP/Postal code 94080
Country USA
 
Platform ID GPL21697
Series (1)
GSE107566 RNA-seq for U937 cells with or without 3 day differentiation with PMA and recovery
Relations
BioSample SAMN08117229
SRA SRX3436117

Supplementary data files not provided
SRA Run SelectorHelp
Raw data are available in SRA
Processed data are available on Series record

| NLM | NIH | GEO Help | Disclaimer | Accessibility |
NCBI Home NCBI Search NCBI SiteMap