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Detection of circadian gene expression in human epidermal suction blister samples

ABSTRACT: To detect time of day dependent gene expression in human epidermis suction blister samples from 20 healthy subjects were obtained at three different time points throughout the day. RNA from 20 subjects were used to perform whole genome microarray analysis. Microarrays from 19 subjects showed sufficient quality to perform analysis for differential gene expression. We detected significant differential expression levels for several canonical clock genes such as Per1, Per2, Per3, Bmal1 and Rev-Erb_alpha throughout the day. In total we identified 294 genes that showed significant circadian gene expression including several transcription factors and rate limiting enzymes. To our knowledge this is the first study to investigate genome wide circadian gene expression in human epidermis.

ORGANISM(S): Homo sapiens

PROVIDER: GSE35635 | GEO | 2012/07/31

SECONDARY ACCESSION(S): PRJNA152487

REPOSITORIES: GEO

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Detection of circadian gene expression in human epidermal suction blister samples

Project description:To detect time of day dependent gene expression in human epidermis suction blister samples from 20 healthy subjects were obtained at three different time points throughout the day. RNA from 20 subjects were used to perform whole genome microarray analysis. Microarrays from 19 subjects showed sufficient quality to perform analysis for differential gene expression. We detected significant differential expression levels for several canonical clock genes such as Per1, Per2, Per3, Bmal1 and Rev-Erb_alpha throughout the day. In total we identified 294 genes that showed significant circadian gene expression including several transcription factors and rate limiting enzymes. To our knowledge this is the first study to investigate genome wide circadian gene expression in human epidermis. Suction blisters of human epidermis were obtained by applying a vacuum for approximately 2.5 h. Suction blisters for each subject (19 subjects in total) were harvested at 9.30 am, 2.30 pm and 7.30 pm.

2012-07-30 | E-GEOD-35635 | biostudies-arrayexpress

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Project description:In a cross balanced design human subjects were given one week of sufficient sleep and insufficient sleep (6 h per day). Following each of these conditions they were then kept awake for a day, a night and the subsequent day. During each of these periods of extended wakefulness 10 blood samples were taken, RNA was extracted from leukocytes, labelled and hybridised to human whole-genome microarrays A total of 427 samples comprising 26 human subjects, for which 20 samples across multiple time-points/sleep condition were collected. We have focussed on two genotypes related to the variable number tandem repeat (VNTR) polymorphism of the circadian gene PERIOD3 (PER3): a 4-repeat VNTR allele of PER3 (PER3(4/4)) and a 5-repeat VNTR allele of PER3 (PER3(5/5)).

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Project description:DNA methylation data generated from epidermal samples (suction blister roofs) of healthy female subjects after repetitive irradiation on three consecutive days using a full spectrum solar simulator. DNA was extracted from suction blisters taken from irradiated and control sites on the lower backs of each subject 24 hours after the final irradiation. DNA was bisulfite converted and then profiled using Illumina Infinium MethylationEPIC BeadChip arrays.

2020-09-02 | E-MTAB-9249 | biostudies-arrayexpress

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Project description:Whole transcriptome sequencing data generated from epidermal samples (suction blister roofs) of healthy female subjects between 21 and 76 years. Aim of the project was the investigation of non-linearities in the human aging progression using an integrative multi-omics analysis. RNA was extracted from suction blisters taken from the volar forearms of each subject, cDNA converted and then sequenced on an Illumina HiSeq 2500 (single-end, 50 bp) to an approximate sequencing depth of 100 million reads per sample.

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RNA seq of epidermal tissue after acute repetitive irradiation

Project description:Whole transcriptome sequencing data generated from epidermal samples (suction blister roofs) of healthy female subjects after repetitive irradiation on three consecutive days using a full spectrum solar simulator. RNA was extracted from suction blisters taken from irradiated and control sites on the lower backs of each subject 24 hours after the final irradiation. RNA was cDNA converted and then sequenced on an Illumina HiSeq 2500 (single-end, 50 bp) to an approximate sequencing depth of 100 million reads per sample.

2020-09-02 | E-MTAB-9251 | biostudies-arrayexpress

Homo sapiens

Project description:Detection of circadian gene expression in human epidermal suction blister samples

| PRJNA152487 | ENA

The neuronal transcription factor NeuroD and its impact on the regulation of dendricity and pigmentation of melanocytes in postinflammatory hyperpigmentation of human skin

Project description:In order to test the gene expression profile in postinflammatory hyperpigmentation, micoarray studies were performed. Totally 14 subjects ( 7 at each phase) were treated by suction blister, and samples from treated area and corresponding control area ( from the same subjects) were taken at 1 week(t1), 2 weeks(t2), 4 weeks(t3), 6 weeks(t4), and 16 weeks(t5) after treatment. Paired samples from subject 6382 at 6th week were missing for microarray hybridization. Therefore, there are 138 array chips available for statistical analysis.

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The clock gene Per1 may exert diurnal control over hippocampal memory consolidation

Project description:The circadian system influences many different biological processes, including memory performance. While the suprachiasmatic nucleus (SCN) functions as the brain’s central pacemaker, downstream “satellite clocks” may also regulate local functions based on the time of day. Within the dorsal hippocampus (DH), for example, local molecular oscillations may contribute to time-of-day effects on memory. Here, we used the hippocampus-dependent Object Location Memory task to determine how memory is regulated across the day/night cycle in mice. First, we systematically determined which phase of memory (acquisition, consolidation, or retrieval) is modulated across the 24h day. We found that mice show better long-term memory performance during the day than at night, an effect that was specifically attributed to diurnal changes in memory consolidation, as neither memory acquisition nor memory retrieval fluctuated across the day/night cycle. Using RNA-sequencing we identified the circadian clock gene Period1 (Per1) as a key mechanism capable of supporting this diurnal fluctuation in memory consolidation, as Per1 oscillates in tandem with memory performance. We then show that local knockdown of Per1 within the DH has no effect on either the circadian rhythm or sleep behavior, although previous work has shown this manipulation impairs memory. Thus, Per1 may independently function within the DH to regulate memory in addition to its known role in regulating the circadian system within the SCN. Per1 may therefore exert local diurnal control over memory consolidation within the DH.

2024-01-12 | GSE222744 | GEO

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