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Diurnal rhythm-modulated transcriptome analysis of meibomian gland in hyperlipidemic mice using RNA sequencing

ABSTRACT: Diurnal rhythm-modulated transcriptome analysis of meibomian gland in hyperlipidemic mice using RNA sequencing

PROVIDER: PRJNA770080 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR16286768_1.fastq.gz	Fastqsanger.gz
	SRR16286768_2.fastq.gz	Fastqsanger.gz
	SRR16286769_1.fastq.gz	Fastqsanger.gz
	SRR16286769_2.fastq.gz	Fastqsanger.gz
	SRR16286770_1.fastq.gz	Fastqsanger.gz

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Diurnal rhythm-modulated transcriptome analysis of meibomian gland in hyperlipidemic mice using RNA sequencing

Project description:Hyperlipidemia can induce the dysfunction of meibomian gland (MG) in mice, which may be affected by circadian rhythm. However, the underlying mechanism remains unclear. In this study, we exposed the hyperlipidemic mice model induced by four months feeding of high-fat diet to the regular light-dark cycles for two weeks. Then, phenotypic observation and RNA-seq of MG in experimental mice were performed to investigate the effect and transcriptional changes of hyperlipidemia and circadian rhythm on MG dysfunction. As a result, several significantly expressed genes and enriched pathways were identified to be associated with MG dysfunction in hyperlipidemic mice under circadian rhythms. High fat diet can not only bring hyperlipidemia, but also cause meibomian gland dysfunction, which is affected by rhythm genes. These data can provide us with a deeper understanding of the outcomes of MG altered by daily nutritional challenge.

2023-01-01 | GSE185613 | GEO

Myocardial Rev-erb regulates metabolic diurnal rhythm in heart failure

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The diurnal rhythm of adipose tissue gene expression is reduced in obese patients with type 2 diabetes

Project description:Animal studies have linked disturbed adipose tissue clock gene rhythms to the pathophysiology of the metabolic syndrome. However, data on molecular clock rhythms in human patients are limited. Therefore, in a standardized real life setting, we compared diurnal gene expression profiles in subcutaneous adipose tissue between obese patients with type 2 diabetes and age-matched healthy lean control subjects, using RNA sequencing. In patients, 1.8% (303 genes) of expressed genes showed significant diurnal rhythms, compared to 8.4% (1421 genes) in healthy controls. In patients, the core clock genes showed reduced amplitude oscillations. Enrichment analysis revealed a loss of rhythm in canonical metabolic pathways including AMPK signaling and cAMP mediated signaling in patients. In conclusion, we provide the first transcriptomics atlas of human adipose tissue diurnal rhythms, and show evidence of decreased diurnal clock and metabolic gene expression rhythms in subcutaneous adipose tissue of obese patients with type 2 diabetes.

2019-01-24 | GSE104674 | GEO

Control of bladder peripheral clock and diurnal micturition pattern by glucocorticoids

Project description:Peripheral clocks function to regulate each organ and are synchronized though various molecular and behavioral signals. However, signals that entrain the bladder clock remain elusive. Here, we show that glucocorticoids are a key cue for the bladder clock in vitro and in vivo. A pBmal1-dLuc human urothelial cell line showed significant shifts in gene expression after cortisol treatment while, in vivo, rhythmic bladder clock gene expression was not influenced by bilateral-adrenalectomy (ADx) but shifted 4 hours forward by corticosterone administration at the inactive phase (CORT). Moreover, the bladder clock shifted 8-12 hours in ADx+CORT mice. These mice saw decreases in the diurnal rhythm of volume voided per micturition, while maintaining diurnal activity rhythm. These results indicate that the diurnal rhythm of glucocorticoid signaling is a zeitgeber that overcomes other entrainment factors for the bladder clock and coordinates the diurnal rhythm of volume voided per micturition. (145 words)

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Project description:Exploring diurnal rhythm in Brachypodium distachyon transcriptome through time-course RNAseq

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A Comparision of Gene Expression between Normal and Diseased Human Meibomian Glands

Project description:The objective of this study is to identify human meibomian gland genes that may promote the development and/or progression of meibomian gland dysfunction. Total RNA was isolated from normals (n=6) and patients with meibomian disease (n=6). The RNA was then used in conjuction with HumanHT-12 v3 Expression BeadChips to assay differential gene expression between normal and diseased meibomian glands.

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The circadian clock in the retinal pigment epithelium controls the diurnal rhythm of phagocytic activity

Project description:The diurnal peak of phagocytosis by the retinal pigment epithelium (RPE) of photoreceptor outer segments is under circadian control, and it is believed that this process involves interactions from both the retina and RPE. Previous studies have demonstrated that a functional circadian clock exists within multiple retinal cell types and RPE cells. Thereby, the aim of the current study was to determine whether the circadian clock in the retina and or RPE controls the diurnal phagocytic peak of photoreceptor outer segments and whether selective disruption of the circadian clock in the RPE would affect RPE cells function and the viability during aging. To that aim, we first generated and validated an RPE tissue-specific KO of the essential clock gene, Bmal1, and then we determined the daily rhythm in phagocytic activity by the RPE in mice lacking a functional circadian clock in the retina or RPE. Then using electroretinography, spectral domain-optical coherence tomography, and optomotor response measurements of visual function we determined the effect of Bmal1 removal in young (6-month-old) and old (18-months old) mice. RPE morphology and lipofuscin accumulation was also determined in young and old mice. Our data show that the circadian clock in the RPE controls the daily diurnal phagocytic peak of POS. Surprisingly, the lack of a functional RPE circadian clock or the diurnal phagocytic peak does not result in any detectable age-related degenerative phenotype in the retina or RPE. Thus, our results demonstrate that the circadian clock in the RPE controls the daily peak in the phagocytic activity. However, the loss of the circadian clock in the RPE does not result in deterioration of photoreceptors or the RPE during aging.

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Proteomics and phosphoproteomics of the diurnal cycle in chow and high fat high sucrose feed rats

Project description:There is growing evidence that energy metabolism and insulin action are regulated by mechanisms that follow a diurnal rhythm and it has been proposed that defects in Akt signalling are associated with the pathophysiology of metabolic disease. It is therefore important to investigate these parameters under physiology of the free-living state. We therefore examined the insulin action in muscle of chow or high fat, high sucrose diet-fed (HFHS) rats during the normal diurnal cycle. HFHS animals displayed hyperinsulinemia, however had reduced systemic glucose disposal and impaired muscle glucose uptake during the feeding period. Proteomics and phosphoproteomics was performed over the diurnal cycle in chow and HFHS rats.

2019-05-20 | PXD010242 | Pride

Wild-type and Hsd3b6-deficient mouse meibomian gland transcriptome

Project description:To dissect molecular mechanisms underlying Hsd3b6−/−meibomian gland phenotypes, we performed RNA-sequencing (RNA-seq) analysis using fluorescence-activated cell sorting (FACS)-purified meibomian gland cells. RNA-seq analysis was performed using FACS-purified Itgav(+);CD45(−) meibomian gland acinar cells from wildtype and Hsd3b6−/−mice.As revealed by gene ontology (GO) enrichment analysis, cells sorted from Hsd3b6−/−mice show increased expression of inflammation-related genes. On the other hand, downregulated genes exhibit the highest enrichment score for the GO term related to “regulation of anatomical structure morphogenesis”, a signature accounting for the phenotype of the meibomian gland atrophy of Hsd3b6−/− mice.

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Dihydrotestosterone induced changes in gene expression in immortalized human meibomian gland epithelial cells

Project description:Genome-wide analysis of dihydrotestosterone (DHT) induced changes in gene expression in immortalized human meibomian gland epithelial cells. Analysis of regulation of immortalized human meibomian gland epithelial cells by dihydrotestosterone at gene expression level. The hypothesis tested in the present study was that the androgen-eye interaction in ocular surface epithelial cells like meibomian gland cells is influenced by androgens through regulation of the expression of multiple genes. Results provide important information of the differential regulation of numerous genes in response to dihydrotestosterone incubation of immortalized human meibomian gland epithelial cells. Total RNA was obtained from immortalized human meibomian gland epithelial cells treated for 72 hours with 10 nM dihydrotestosterone (n=3) or vehicle (n=3). The RNA was then used with Illumina HumanHT-12 v3 Expression BeadChips to determine the effect of DHT on gene expression in an immortalized human meibomian epithelial cell line developed in our laboratory.

2011-03-31 | E-GEOD-18091 | biostudies-arrayexpress

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