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| Status |
Public on Aug 30, 2013 |
| Title |
Effects of neonatal stress and morphine on murine hippocampal gene expression |
| Organism |
Mus musculus |
| Experiment type |
Expression profiling by array
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| Summary |
Critically ill preterm infants experience multiple stressors while hospitalized. Morphine is commonly prescribed to ameliorate their pain and stress. We hypothesized that neonatal stress will have a dose-dependent effect on hippocampal gene expression, and these effects will be altered by morphine treatment. Male C57BL/6 mice were exposed to 5 treatment conditions between postnatal day 5 and 9: 1) Control, 2) mild stress + saline, 3) mild stress + morphine, 4) severe stress + saline and 5) severe stress + morphine. Hippocampal RNA was extracted and analyzed using Affymetrix Mouse Gene 1.0 ST Arrays. Single gene analysis and gene set analysis were used to compare groups with validation by qPCR. Stress resulted in enrichment of genes sets related to fear response, oxygen carrying capacity and NMDA receptor synthesis. Morphine downregulated gene sets related to immune function. Stress plus morphine resulted in enrichment of mitochondrial electron transport gene sets, and down-regulation of gene sets related to brain development and growth. We conclude that neonatal stress alone influences hippocampal gene expression, morphine alters a subset of stress-related changes in gene expression and influences other gene sets. Stress plus morphine show interaction effects not present with either stimulus alone. These changes may alter neurodevelopment.
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| Overall design |
Male mice were exposed to 5 treatment conditions between postnatal day (P)5 and P9 (n=3/group), with birth recorded as P1. Litters were culled to n=7 maximum per dam. Groups included: 1) Untreated controls (CC), 2) mild stress + saline (MSS), 3) mild stress + morphine (MSM), 4) severe stress + saline (SSS) and 5) severe stress + morphine (SSM).
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| Contributor(s) |
Bammler TK, Juul SE, Farin FF, Beyer RP, Gleason CA |
| Citation(s) |
21178816 |
| |
| Submission date |
Aug 27, 2013 |
| Last update date |
Mar 04, 2019 |
| Contact name |
James William MacDonald |
| E-mail(s) |
jmacdon@uw.edu
|
| Organization name |
University of Washington
|
| Department |
Environmental and Occupational Health Sciences
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| Street address |
4225 Roosevelt Way NE
|
| City |
Seattle |
| State/province |
WA |
| ZIP/Postal code |
98105-6099 |
| Country |
USA |
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| Platforms (1) |
| GPL6246 |
[MoGene-1_0-st] Affymetrix Mouse Gene 1.0 ST Array [transcript (gene) version] |
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| Samples (15)
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| Relations |
| BioProject |
PRJNA217692 |
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