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Sample GSM6797932 Query DataSets for GSM6797932
Status Public on Dec 07, 2022
Title Aged RVLM, set1, biological replicate 1
Sample type RNA
Source name Rostral ventrolateral medulla, Aged
Organism Rattus norvegicus
Characteristics strain: Fischer 344
gender: Male
weight: 454 g
developmental stage: Aged
tissue: RVLM
Treatment protocol n/a
Growth protocol n/a
Extracted molecule total RNA
Extraction protocol Total RNA was extracted with Rneasy Lipid tissue Mini Kit followed by DNase I treatment.
Label SYBR Green
Label protocol Fifty ng of RNA from each sample was reverse transcribed and preamplified using an RT2 preamp cDNA synthesis kit (Qiagen, Inc.) with PBR-152Z RT2 preamp pathway primer mix (Qiagen, Inc.). Quantitative polymerase chain reactions were performed on these preamplified samples on StepOnePlus master cycler (Applied Biosystems™, Thermo Fisher Scientific) using Rat GABA & Glutamate RT2 Profiler PCR arrays (Qiagen, Inc., GeneGlobe ID PARN-152Z) with SYBR Green ROX qPCR master mix (Qiagen, Inc.,).
Hybridization protocol n/a
Scan protocol n/a
Description Aged RVLM
Aged 1503052
Data processing Matrix non-normalized: To calculate threshold cycle (Ct) values, the background fluorescence of each well was identified by setting the start of baseline at cycle 3 and the end of baseline at cycle 15 for each array plate. The threshold value for Ct was manually selected, and the same threshold value (1.52) was used for all the arrays. After threshold selection, the Ct values of each array plate were exported as an Excel file. StepOnePlus software (Applied Biosystems) was used for Ct values extraction.
Matrix normalized: The Ct values for three of the five housekeeping genes (B2m, Hprt1, and Rplp1) were identified to be consistent between arrays and were therefore used as reference genes for normalizing RNA expression. The geometric mean of the B2m, Hprt1, and Rplp1 Ct values for each experimental RVLM sample/array was used for the ΔCt value calculation of each gene. Normalization process was performed in Microsoft Excel. Genes that showed <30 Ct value in more than 50% of the arrays were used in the final analysis. Seventy-nine of the 84 GABA and glutamate neurotransmission-related genes met these criteria. In contrast, Avp, Gabra6, Gabrr1, Grm6, and Slc1a7 genes did not meet these criteria and were removed from the final analysis. Target gene signal normalized to geometric mean of B2m, Hprt1, and Rplp1 reference genes signal; 2–ΔCt, where –ΔCt = –(Ct_Target –geometric mean of B2m, Hprt1, and Rplp1 reference genes Ct values). See Data table below.
Fold Change: Aged vs. young, aged vs. middle-aged, and middle-aged vs. young rats RVLM gene expression differences are represented as fold change values calculated using the 2–ΔΔCt method (Livak and Schmittgen, 2001). Fold change calculations were performed in Microsoft Excel.
Submission date Dec 07, 2022
Last update date Dec 07, 2022
Contact name Sivasai Balivada
Phone 7854777070
Organization name University of Texas at El Paso
Street address 4th floor, Bioscience research building
City El Paso
State/province Texas
ZIP/Postal code 79968
Country USA
Platform ID GPL32921
Series (1)
GSE220296 Age-associated downregulation of glutamate and GABA neurotransmission-related gene expression in the rostral ventrolateral medulla of male Fischer 344 rats

Data table header descriptions
VALUE normalized signal

Data table
A01 0.34710985
A02 0.025806565
A03 0.163599263
A04 0.003226128
A05 0.065894365
A06 2.539698328
A07 null
A08 0.000905317
A09 0.013097826
A10 0.006135623
A11 0.043423909
A12 0.011018998
B01 0.117911821
B02 0.404023678
B03 0.120594474
B04 0.092038134
B05 0.200846496
B06 0.006546636
B07 0.075433249
B08 null

Total number of rows: 96

Table truncated, full table size 1 Kbytes.

Supplementary data files not provided
Processed data included within Sample table
Processed data are available on Series record

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