Chronic alcohol consumption from adolescence-to-adulthood in mice — Effect on gene expression in the hypothalamus
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE42770 | GEO | 2013/06/30
SECONDARY ACCESSION(S): PRJNA183191
REPOSITORIES: GEO
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Project description:We employed a paradigm of chronic moderate alcohol intake from adolescence-to-adulthood in mice, and analyzed the alcohol effect on both behavioral and hypothalamic gene expression changes. We employed a paradigm of chronic moderate alcohol intake from adolescence-to-adulthood in mice. Before chronic alcohol drinking began, mice (3 weeks old) were allowed to adapt to drinking tubes with both tubes containing water from experimental day 1-5. After adaptation period, mice were randomly aside to 5% alcohol group, 10% alcohol group or water-only control group (n=16-18). Chronic alcohol drinking lasted to day 57 of the experiment without any change and interruption. Then each mouse is sacrificed by decapitation, and the hypothalamus was dissected for rapid freeze and storage at -80 M-BM-:C. Hypothalamus tissue samples were used for total RNA extraction. RNA samples were pooled for microarray. For water-only group, nine mice were used to make three pools, with three equal amounts of RNA samples per pool. For alcohol group, nineteen mice were used to make nine pools, with one to three equal RNA samples per pool.
2013-06-30 | E-GEOD-42770 | biostudies-arrayexpress
Project description:The crucial role of nutrition for cerebral health and the impact of dietary habits on brain structure and function have been long far recognized. To date a major health concern is associated with the increased consumption of fructose as added sugar in many types of drinks and processed foods, especially among young people. High-fructose intake has been pointed out as the possible culprit for the raised incidence of chronic diseases, such as obesity, cardiovascular disease, nonalcoholic fatty liver disease, and type 2 diabete. Further, it has been reported that high-fructose intake is associated with the over-activation of its cerebral metabolism, which was proposed to negatively impact on whole brain physiology and cognitive function. Notably, we previously reported that short-term fructose-rich diet induces mitochondrial dysfunction, oxidative stress, and neuroinflammation in hippocampus of young rats, as well as the imbalance of redox homeostasis, autophagic mechanisms and representation of synaptic markers in frontal cortex of both adult and young rats. Animal studies have also revealed the damaging effect of high-fructose diets on hippocampal functions during periods of neurocognitive development, such as childhood and adolescence. Hypothalamus plays a crucial role in maintaining whole body homeostasis. Long-term fructose overfeeding was reported to alter hypothalamic-pituitary-adrenal axis, leading to elevations in glucocorticoids in peri-adolescent rats [22]. Further, fructose overconsumption was associated with impairment of hypothalamic insulin signalling, oxidative stress and inflammation , and it was proposed that fructose-driven perturbations of hypothalamic function may compromise the potential for satiety, thereby increasing the prospect of developing obesity. Data currently available on hypothalamic dysfunctions related to a high-fructose diet essentially refer to the effects of long-term sugar feeding, while information on corresponding alterations associated with a short-term dietary treatment, particularly in the critical period of adolescence, is still lacking. Due to complexity and multiplicity of hypothalamic functions, there is also the need for a holistic characterization aimed at unveiling the general picture of hypothalamic dysfunctions associated with a high-fructose diet. To fill this gap, we investigated adolescent rats fed a fructose-rich or control diet, for 3 weeks. To verify whether the fructose-driven changes are rescued after the switch to a control diet, half of the rats from both animal groups were then fed a control diet for additional 3 weeks until young adulthood phase. Quantitative proteomics on hypothalamic extracts of all animal groups was used to identify molecular alterations triggered by fructose-rich diet and to obtain insights into the relationship between sugar feeding and possible dysfunctions of hypothalamus.
2023-03-11 | PXD038834 | Pride
Project description:Genome-wide DNA methylation profiling of individuals consuming alcohol and controls in LC samples. Individuals consuming alcohol were profiled at time of intake (T1) into treatment facility and four weeks into treatment (T2). Controls were profiled once. The Illumina Infinium 450k Human DNA Methylation BeadChip v1.0 was used to obtain DNA methylation profiles across 485,577 CpGs in LC samples. Samples included 33 case subjects at T1, 26 case subjects at T2 and 33 controls. Bisulfite-converted DNA from 92 samples were hybridized to the Illumina Infinium 450k Human Methylation BeadChip v1.0.
2014-09-24 | E-GEOD-57853 | biostudies-arrayexpress
Project description:Genome-wide DNA methylation profiling of individuals consuming alcohol and controls in LC samples. Individuals consuming alcohol were profiled at time of intake (T1) into treatment facility and four weeks into treatment (T2). Controls were profiled once. The Illumina Infinium 450k Human DNA Methylation BeadChip v1.0 was used to obtain DNA methylation profiles across 485,577 CpGs in LC samples. Samples included 33 case subjects at T1, 26 case subjects at T2 and 33 controls.
2014-09-24 | GSE57853 | GEO
Project description:Adolescent binge alcohol exposure has been previously shown to have long-lasting effects on the expression of hypothalamic genes that regulate the stress response, even in the absence of subsequent adult alcohol exposure. Those data suggested that alcohol can induce permanent gene expression changes, potentially through epigenetic modifications. Importantly, epigenetic modifications can be transmitted to future generations therefore, in these studies we investigated the effects of adolescent binge alcohol exposure on hypothalamic gene expression patterns in the F1 generation offspring. It has been well documented that maternal alcohol exposure during fetal development can have devastating neurological consequences. However, less is known about the consequences of maternal and/or paternal alcohol exposure outside of the gestational time frame. Here, we exposed adolescent male and female rats to a repeated binge EtOH exposure paradigm and then mated them in adulthood. Hypothalamic samples were taken from the offspring of these animals at postnatal day (PND) 7 and subjected to a genome-wide microarray analysis followed by qRT-PCR for selected genes. Importantly, the parents were not intoxicated at the time of mating and were not exposed to EtOH at any time during gestation therefore, the offspring were never directly exposed to EtOH. Our results showed that the offspring of alcohol-exposed parents had significant differences in the expression of hypothalamic genes that mediate neurogenesis and synaptic plasticity during neurodevelopment, genes important for directing chromatin remodeling, posttranslational modifications or transcription regulation, as well as genes involved in regulation of obesity and reproductive function. These data demonstrate that repeated binge alcohol exposure during pubertal development can potentially have detrimental effects on future offspring even in the absence of direct fetal alcohol exposure.
2014-03-19 | GSE53028 | GEO
Project description: Not available
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Project description:Population-based studies show cannabis use doubles the risk of developing schizophrenia especially when use occurs in early adolescence (prior to age 15). However, the cause-and-effect mechanisms are largely unknown. To investigate the effect of cannabis on brain maturation and relation to the development of psychosis-like behaviours in adulthood, we treated young adolescent mice with vehicle or cannabis extract once a day for 2 weeks between postnatal days 14 and 28, and then collected hippocampal tissue for microarray analysis 12 weeks later. We identify a total of 78 differentially expressed genes (25 upregulated and 53 downregulated; p<0.05, fold change ± 1.2) and validate increases in dopamine D2 receptor (Drd2) and fatty acid amide hydrolase (Faah). Changes in Faah expression were limited to the hippocampus however Drd2 also increased in striatum but not prefrontal cortex or amygdala. When tested in adulthood with a behavioural panel relevant to schizophrenia, cannabis-treated mice displayed lower anxiety in the elevated zero-maze, decreased social preference, increased social novelty preference, mild cognitive impairments in a spatial version of the novel object recognition task and absence of latent inhibition when compared to vehicle controls. Adolescent treatment with cannabis extract thus lead to long-lasting changes in gene expression within the hippocampus which together result in behavioural deficits consistent with the negative and positive symptoms of schizophrenia.
2018-02-17 | GSE58437 | GEO
Project description:Adolescent binge alcohol exposure has been previously shown to have long-lasting effects on the expression of hypothalamic genes that regulate the stress response, even in the absence of subsequent adult alcohol exposure. Those data suggested that alcohol can induce permanent gene expression changes, potentially through epigenetic modifications. Importantly, epigenetic modifications can be transmitted to future generations therefore, in these studies we investigated the effects of adolescent binge alcohol exposure on hypothalamic gene expression patterns in the F1 generation offspring. It has been well documented that maternal alcohol exposure during fetal development can have devastating neurological consequences. However, less is known about the consequences of maternal and/or paternal alcohol exposure outside of the gestational time frame. Here, we exposed adolescent male and female rats to a repeated binge EtOH exposure paradigm and then mated them in adulthood. Hypothalamic samples were taken from the offspring of these animals at postnatal day (PND) 7 and subjected to a genome-wide microarray analysis followed by qRT-PCR for selected genes. Importantly, the parents were not intoxicated at the time of mating and were not exposed to EtOH at any time during gestation therefore, the offspring were never directly exposed to EtOH. Our results showed that the offspring of alcohol-exposed parents had significant differences in the expression of hypothalamic genes that mediate neurogenesis and synaptic plasticity during neurodevelopment, genes important for directing chromatin remodeling, posttranslational modifications or transcription regulation, as well as genes involved in regulation of obesity and reproductive function. These data demonstrate that repeated binge alcohol exposure during pubertal development can potentially have detrimental effects on future offspring even in the absence of direct fetal alcohol exposure. Male and female Wistar rats were purchased from Charles River Laboratories (Wilmington, MA) at weaning (postnatal day (PND) 23) and allowed to acclimate for 7 days after arrival. Animals were handled for 5 min./once/day beginning at PND 30. Pubertal EtOH exposure began on PND 37, which is defined as peri-puberty. Animals were undisturbed following the first exposure of our binge EtOH exposure paradigm until PND 68 (late puberty/early adult) at which time they received a second exposure to the same treatment paradigm. During the duration of the experiment, males and females were separately housed in pairs on a 12:12 light/dark cycle with lights on at 0700 h with food and water available ad libitum. Binge Exposure Paradigm and Treatment Design. Rats were handled 5min./once/day for 7 d prior to treatment to control for nonspecific stress responses. At 37 d, animals were given 3 g/kg EtOH (20% v/v in tap water; N = 3/sex), or tap water alone (N = 3/sex), once/day via oral gavage at 10:00 AM to avoid disrupting normal feeding patterns. This process was repeated according to the following schedule for a total duration of 8 consecutive days: 3 d EtOH, 2 d tap water, 3 d EtOH. Control animals were given tap water alone once/day for 8 consecutive days. Our previous studies showed that this repeated binge-pattern EtOH paradigm does not affect body weight/growth curves and consistently results in blood alcohol concentrations (BAC) of 150-180 mg/dl in males and 210-240 mg/dl in females. We and others have previously used this paradigm as a model for the pattern of binge alcohol consumption observed in adolescents and BAC achieved are similar to those observed in humans following a binge drinking episode . After peri-pubertal treatments, animals were left undisturbed in their home cage until PND 68 when each group was again exposed to their respective treatment (i.e. control or binge EtOH. We waited 24 hours after the last dose of EtOH to ensure that blood alcohol concentrations in the parents were undetectable at the time of mating (data not shown). Animals were grouped into mating pairs: binge male + binge female (N = 3 pairs); water male + water female (N = 3 pairs). All of the females gave birth to 12-16 pups approximately 28 d after being housed with a male, indicating that conception took place approximately 6 d after pairing; therefore, the pups were never directly exposed to alcohol at any time. At PND 7 pups were deeply anesthetized on ice and sacrificed. Brains were rapidly removed, the hypothalamus microdissected on ice, and then stored in -80ºC until further processing for a genome-wide analysis on hypothalamic total RNA samples using a chip-based microarray (Southern California Genotyping Consortium, SCGC, Illumina Rat Ref-12). The PND 7 time point was chosen because the extent of rat neurodevelopment at PND 7 is roughly equivalent to that of a human infant at birth
2014-03-19 | E-GEOD-53028 | biostudies-arrayexpress
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2017-08-31 | GSE93601 | GEO
Project description:Chronic stress exposure in adolescence can lead to a lasting change in stress responsiveness later in life and is associated with increased mental health issues in adulthood. Here we investigate whether the Chronic Social Instability (CSI) paradigm in mice influences the molecular response to novel acute stressors
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