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Restraint stress differentially regulates inflammation and glutamate receptor gene expression in the hippocampus of C57BL/6 and BALB/c mice. 2017

Monica Sathyanesan, and Jacob M Haiar, and Michael J Watt, and Samuel S Newton
a Division of Basic Biomedical Sciences , Sanford School of Medicine, University of South Dakota , Vermillion , SD , USA.

The inbred mouse strains, C57BL/6 and BALB/c have been used widely in preclinical psychiatric research. The differences in stress susceptibility of available strains has provided a useful platform to test pharmacological agents and behavioral responses. Previous brain gene profiling efforts have indicated that the inflammation and immune response gene pathway is the predominant gene network in the differential stress response of BALB/c and C57BL/6 mice. The implication is that a composite stress paradigm that includes a sequence of extended, varied and unpredictable stressors induces inflammation-related genes in the hippocampus. We hypothesized that the regulation of inflammation genes in the brain could constitute a primary stress response and tested this by employing a simple stress protocol, repeated exposure to the same stressor for 10 days, 2 h of restraint per day. We examined stress-induced regulation of 13 proinflammatory cytokine genes in male BALB/c and C57BL/6 mice using quantitative PCR. Elevated cytokine genes included tumor necrosis factor alpha (TNFα), interleukin 6 (IL6), interleukin 10 (IL10), tumor necrosis factor (TNF) super family members and interleukin 1 receptor 1 (IL1R1). In addition, we examined restraint stress-induced regulation of 12 glutamate receptor genes in both strains. Our results show that restraint stress is sufficient to elevate the expression of inflammation-related genes in the hippocampus of both BABLB/c and C57BL/6 mice, but they differ in the genes that are induced and the magnitude of change. Cell types that are involved in this response include endothelial cells and astrocytes. Lay summary Repeated exposure to a simple restraint stress altered the activities of genes involved in inflammation and the functions of the excitatory neurotransmitter, glutamate. These changes in the hippocampus of the mouse brain showed differences that were dependent on the strain of mice and the length of the stress exposure. The effects of stress on activity of these genes may lead to alterations in behavior.

UI MeSH Term Description Entries
D007249 Inflammation A pathological process characterized by injury or destruction of tissues caused by a variety of cytologic and chemical reactions. It is usually manifested by typical signs of pain, heat, redness, swelling, and loss of function. Innate Inflammatory Response,Inflammations,Inflammatory Response, Innate,Innate Inflammatory Responses
D008297 Male Males
D008807 Mice, Inbred BALB C An inbred strain of mouse that is widely used in IMMUNOLOGY studies and cancer research. BALB C Mice, Inbred,BALB C Mouse, Inbred,Inbred BALB C Mice,Inbred BALB C Mouse,Mice, BALB C,Mouse, BALB C,Mouse, Inbred BALB C,BALB C Mice,BALB C Mouse
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D012149 Restraint, Physical Use of a device for the purpose of controlling movement of all or part of the body. Splinting and casting are FRACTURE FIXATION. Immobilization, Physical,Physical Restraint,Physical Immobilization,Physical Restraints,Restraints, Physical
D005786 Gene Expression Regulation Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control (induction or repression) of gene action at the level of transcription or translation. Gene Action Regulation,Regulation of Gene Expression,Expression Regulation, Gene,Regulation, Gene Action,Regulation, Gene Expression
D006624 Hippocampus A curved elevation of GRAY MATTER extending the entire length of the floor of the TEMPORAL HORN of the LATERAL VENTRICLE (see also TEMPORAL LOBE). The hippocampus proper, subiculum, and DENTATE GYRUS constitute the hippocampal formation. Sometimes authors include the ENTORHINAL CORTEX in the hippocampal formation. Ammon Horn,Cornu Ammonis,Hippocampal Formation,Subiculum,Ammon's Horn,Hippocampus Proper,Ammons Horn,Formation, Hippocampal,Formations, Hippocampal,Hippocampal Formations,Hippocampus Propers,Horn, Ammon,Horn, Ammon's,Proper, Hippocampus,Propers, Hippocampus,Subiculums
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013045 Species Specificity The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species. Species Specificities,Specificities, Species,Specificity, Species
D013315 Stress, Psychological Stress wherein emotional factors predominate. Cumulative Stress, Psychological,Emotional Stress,Individual Stressors,Life Stress,Psychological Cumulative Stress,Psychological Stress Experience,Psychological Stress Overload,Psychologically Stressful Conditions,Stress Experience, Psychological,Stress Measurement, Psychological,Stress Overload, Psychological,Stress Processes, Psychological,Stress, Emotional,Stressful Conditions, Psychological,Psychological Stress,Stress, Psychologic,Stressor, Psychological,Condition, Psychological Stressful,Condition, Psychologically Stressful,Conditions, Psychologically Stressful,Cumulative Stresses, Psychological,Experience, Psychological Stress,Individual Stressor,Life Stresses,Measurement, Psychological Stress,Overload, Psychological Stress,Psychologic Stress,Psychological Cumulative Stresses,Psychological Stress Experiences,Psychological Stress Measurement,Psychological Stress Measurements,Psychological Stress Overloads,Psychological Stress Processe,Psychological Stress Processes,Psychological Stresses,Psychological Stressful Condition,Psychological Stressful Conditions,Psychological Stressor,Psychological Stressors,Psychologically Stressful Condition,Stress Experiences, Psychological,Stress Processe, Psychological,Stress, Life,Stress, Psychological Cumulative,Stressful Condition, Psychological,Stressful Condition, Psychologically,Stressor, Individual

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