NCBI Logo
GEO Logo
   NCBI > GEO > Accession DisplayHelp Not logged in | LoginHelp
GEO help: Mouse over screen elements for information.
          Go
Sample GSM4008955 Query DataSets for GSM4008955
Status Public on Nov 18, 2019
Title GBM2_GBM_2_6
Sample type SRA
 
Source name Human brain surgery sample
Organism Homo sapiens
Characteristics tissue: Brain
diagnosis: Glioblastoma multiforme
region: Frontal lobe
Biomaterial provider University clinic Freiburg, Department of Neurosurgery
Extracted molecule total RNA
Extraction protocol Fresh tissue was dissected by removing the meninges. Single-cell suspesions were generated with a dounce potter followed by passing through a cell strainer. Myelin was removed using percoll gradient centrifugation.
As described in mCEL-Seq2 protocol (Hashimshony et al. 2016 and Herman et al. 2018)
Adapted from TruSeq Small RNA Library Preparation Protocol
 
Library strategy RNA-Seq
Library source transcriptomic
Library selection cDNA
Instrument model Illumina HiSeq 3000
 
Description library of 192 cells
Data processing For image aquisition, intensity extraction and basecalling HiSeq Control Software 2.0.2, RTA 2.4.11 / Recipe Fragment 2.0.0.2​ was used. Conversion of bcl2fastq files was performed using bcl2fastq 2.17.1.14
Paired end reads were aligned to the transcriptome using bwa (version 0.6.2-r126) with default parameters. The transcriptome contained all gene models based on the mouse ENCODE VM9 release downloaded from the UCSC genome browser comprising 57,207 isoforms derived from 57,207 gene loci with 57,114 isoforms mapping to fully annotated chromosomes (1 to 19, X, Y, M). All isoforms of the same gene were merged to a single gene locus. Furthermore, gene loci overlapping by >75% were merged to larger gene groups. This procedure resulted in 34,111 gene groups.
The right mate of each read pair was mapped to the ensemble of all gene loci and to the set of 92 ERCC spike-ins in sense direction. Reads mapping to multiple loci were discarded. The left read contains the barcode information: the first six bases correspond to the cell specific barcode followed by six bases representing the unique molecular identifier (UMI). The remainder of the left read contains a poly(T) stretch. The left read was not used for quantification. For each cell barcode, the number of UMIs per transcript was counted and aggregated across all transcripts derived from the same gene locus.
Based on binomial statistics, the number of observed UMIs was converted into transcript counts (Gruen et al., 2014).
Genome_build: ENCODE VM9
Supplementary_files_format_and_content: CSV files, columns represent each cell barcode (total barcodes used = 192), rows represent the geneid and the values in the file are the quantified number of transcripts.
 
Submission date Aug 06, 2019
Last update date Nov 19, 2019
Contact name Sagar -
E-mail(s) sagar@uniklinik-freiburg.de
Organization name University Medical Center Freiburg
Department Department of Internal Medicine II
Lab Sagar
Street address Hugstetter Straße 55
City Freiburg
ZIP/Postal code 79106
Country Germany
 
Platform ID GPL21290
Series (1)
GSE135437 Mapping microglia diversity in the human brain through the integration of high-dimensional techniques
Relations
BioSample SAMN12501474
SRA SRX6658680

Supplementary file Size Download File type/resource
GSM4008955_GBM2_GBM_2_6.coutt.tsv.gz 55.9 Kb (ftp)(http) TSV
SRA Run SelectorHelp
Raw data are available in SRA
Processed data provided as supplementary file

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