|
| Status |
Public on Mar 16, 2014 |
| Title |
92 years old Male |
| Sample type |
RNA |
| |
|
| Source name |
92 years old Male
|
| Organism |
Homo sapiens |
| Characteristics |
age: 92 years old
Sex: Male
|
| Growth protocol |
The postmortem brain tissue samples were neuropathologically normal for age, and were derived from non-demented individuals. Tissue was procured in accordance with institutional guidelines. Human cortical grey matter samples were dissected from the frontal pole (Brodmann area 9, 10), and were snap frozen in liquid nitrogen and stored at -85ºC. Human brain samples with a tissue pH > 6.5 were used to exclude prolonged terminal hypoxia
|
| Extracted molecule |
total RNA |
| Extraction protocol |
Trizol extraction of total RNA was performed according to the manufacturer's instructions.
|
| Label |
biotin
|
| Label protocol |
Dissected cortical grey mater was cut into small pieces in the frozen states and ~70 mg was homogenized immediately in Trizol (Gibco) and RNA was isolated. RNA that was intact by electrophoresis and had an A260/A280 ratio ≥ 1.9 was used for cDNA synthesis. cDNA synthesis, cRNA synthesis and fragmentation, and preparation of the hybridization cocktail were carried out according to the Affymetrix protocol (Affymetrix GeneChip Expression Analysis Technical Manual)
|
| |
|
| Hybridization protocol |
Hybridizations were performed in the Genechip hybridization over 640 (60vrpm) for 16 hrs at 45ºC. The probe arrays were then washed, stained in the GeneChip Fluidics Station 400 operated by GeneChip software following the appropriate fluidics protocols.
|
| Scan protocol |
Affymetrix Microarray Suite 5.0 was utilized to generate Affymetrix present/absent calls. Probe-level Liner Model (PLM) was used to normalize the arrays at probe level and compute model-based expression values using the PM only model. The dChip software www.dchip.org, [3] was used for clustering visualization.
|
| Description |
92 years old Male
|
| Data processing |
The data were analyzed with Microarray Suite version 5.0 (MAS 5.0) using Affymetrix default analysis settings and global scaling as normalization method. The trimmed mean target intensity of each array was arbitrarily set to 100.
|
| |
|
| Submission date |
Jan 08, 2014 |
| Last update date |
Jun 26, 2019 |
| Contact name |
Tun-Hsiang Yang |
| E-mail(s) |
yangth@gmail.com
|
| Organization name |
HMS
|
| Department |
Genetics
|
| Lab |
Yankner
|
| Street address |
77 Avenue Louis Pasteur
|
| City |
Boston |
| State/province |
MA |
| ZIP/Postal code |
02115 |
| Country |
USA |
| |
|
| Platform ID |
GPL570 |
| Series (1) |
| GSE53890 |
REST and Stress Resistance in Aging and Alzheimer’s Disease |
|
| Relations |
| Reanalyzed by |
GSE133349 |
