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Calorie restriction governs intestinal epithelial regeneration through cell autonomous regulation of mTORC1 in reserve stem cells

ABSTRACT: Calorie restriction governs intestinal epithelial regeneration through cell autonomous regulation of mTORC1 in reserve stem cells

PROVIDER: PRJNA429386 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6456880.fastq.gz	Fastqsanger.gz
	SRR6456881.fastq.gz	Fastqsanger.gz
	SRR6456872.fastq.gz	Fastqsanger.gz
	SRR6456873.fastq.gz	Fastqsanger.gz
	SRR6456874.fastq.gz	Fastqsanger.gz

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Calorie restriction governs intestinal epithelial regeneration through cell autonomous regulation of mTORC1 in reserve stem cells

Project description:Here, we show that CR enhances regenerative capacity of the intestinal epithelium as a result of increased number of reserve ISCs. We observe that precise regulation of mechanistic target of Rapamycin complex 1 (mTORC1) signaling plays a significant role in regulation of sensitivity of reserve intestinal stem cells to injury and that premature activation of mTORC1 signaling through nutrient modulation, at the time of damage, leads to poor regeneration outcome. These data delineate a critical role for mTORC1 signaling in epithelial regeneration and inform clinical strategies based on nutrient modulation of mTORC1 activity.

2018-01-15 | GSE109002 | GEO

Calorie Restriction Governs Intestinal Epithelial Regeneration through Cell-Autonomous Regulation of mTORC1 in Reserve Stem Cells.

Project description:Aging is a complex process associated with a decline in functionality of adult stem cells affecting tissue homeostasis and regeneration. Calorie restriction (CR) is the only experimental manipulation known to extend lifespan and reduce the incidence of age-related disorders across numerous species. These benefits are likely mediated, at least in part, through the preservation of stem cell function. Here, we show that CR enhances the regenerative capacity of the intestinal epithelium through preservation of an injury-resistant reserve intestinal stem cell (ISC) pool. Cell-autonomous activity of mechanistic target of rapamycin complex 1 (mTORC1) governs the sensitivity of reserve ISCs to injury. CR inhibits mTORC1 in these cells, protecting them against DNA damage, while mTORC1 stimulation, either genetically or through nutrient sensing, sensitizes reserve ISCs to injury, thus compromising regeneration of the epithelium. These data delineate a critical role for mTORC1 in epithelial regeneration and inform clinical strategies based on nutrient modulation.

| S-EPMC5919411 | biostudies-literature

Calorie restriction and aging

Project description:Gene expression profiles of kidney tissue from control-fed 5-month-old, control-fed 30-month-old and calorie restricted 30 month-old C57BL/6 mice. Keywords = kidney, aging, calorie restriction Keywords: other

2003-06-23 | GSE459 | GEO

Comparison between calorie-restricted and time-restricted without calorie restriction

Project description:Comparison between calorie-restricted and time-restricted without calorie restriction

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Distinct and additive effects of calorie restriction and rapamycin in aging skeletal muscle [CR data set]

Project description:As global life expectancy continues to climb, maintaining skeletal muscle function is increasingly essential to ensure a good life quality for aging populations. Calorie restriction (CR) is the most potent and reproducible intervention to extend health and lifespan, but is largely unachievable in humans. Therefore, identification of “CR mimetics” has received much attention. Since CR targets nutrient-sensing pathways centering on mTORC1, rapamycin, the allosteric inhibitor of mTORC1, has been proposed as a potential CR mimetic and counteracts age-related muscle loss. Therefore, we tested whether rapamycin acts via similar mechanisms as CR to slow muscle aging. Contrary to our prediction, long-term CR and rapamycin-treated geriatric mice display distinct skeletal muscle gene expression profiles despite both conferring benefits to aging skeletal muscle. Furthermore, CR improved muscle integrity in a mouse with nutrient-insensitive sustained muscle mTORC1 activity and rapamycin provided additive benefits to CR in aging mouse muscles. Therefore, RM and CR exert distinct, compounding effects in aging skeletal muscle, opening the possibility of parallel interventions to counteract muscle aging.

2022-03-02 | GSE171322 | GEO

Calorie restriction regulates translation to regulate metabolism in mouse liver

Project description:Using next generation sequencing, we report transcripts that are differentially associated in the mouse liver polysomes under calorie restriction.

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Impact of graded calorie restriction on mouse liver protein expression

Project description:Calorie restriction (CR) extends lifespan by modulating the mechanisms involved in aging. We quantified the hepatic proteome of male C57BL/6 mice exposed to graded levels of CR (0% to 40% CR) for three months, and evaluated which signaling pathways were most affected.

2023-10-24 | PXD033436 | Pride

The impact of calorie restriction and diet-induced obesity on microRNA expression

Project description:We analyzed the impact of calorie restriction and diet-induced obesity on expression of microRNAs in the mouse colon. For this analysis, data was LOESS normalized in R. Data was then imported into BRB Array for analysis. We identified microRNAs that were altered in response to calorie-restriction and diet-induced obesity

2014-04-30 | GSE56025 | GEO

Extreme calorie restriction and energy source starvation in Saccharomyces cerevisiae represent distinct physiological states

Project description:Cultivation methods used to investigate microbial calorie restriction often result in carbon and energy starvation. This study aims to dissect cellular responses to calorie restriction and starvation in Saccharomyces cerevisiae by using retentostat cultivation. In retentostats, cells are continuously supplied with a small, constant carbon and energy supply, sufficient for maintenance of cellular viability and integrity but insufficient for growth. When glucose-limited retentostats cultivated under extreme calorie restriction were subjected to glucose starvation, calorie-restricted and glucose-starved cells were found to share characteristics such as increased heat-shock tolerance and expression of quiescence-related genes. However, they also displayed strikingly different features. While calorie-restricted yeast cultures remained metabolically active and viable for prolonged periods of time, glucose starvation resulted in rapid consumption of reserve carbohydrates, population heterogeneity due to appearance of senescent cells and, ultimately, loss of viability. Moreover, during starvation, calculated rates of ATP synthesis from storage carbohydrates were 2-3 orders of magnitude lower than steady-state ATP-turnover rates calculated under extreme calorie restriction in retentostats. Stringent reduction of ATP turnover during glucose starvation was accompanied by a strong down-regulation of genes involved in protein synthesis. These results demonstrate that extreme calorie restriction and carbon starvation represent different physiological states in S. cerevisiae.

2011-08-16 | GSE22602 | GEO

Calorie restriction and calorie dilution have different impacts on body fat, metabolism, behavior and hypothalamic gene expression

Project description:Caloric restriction is a robust intervention to increase life span. Giving less food (CR), or allowing free access to diluted diet with indigestible components (CD) are two methods to impose restriction. CD does not generate the same lifespan effect as CR. We compared responses of C57BL/6 mice to equivalent levels of CR and CD. Our study calorie restriction and calorie two restriction methods different effect on hypothamic gene expression pattern, RNA-seq was performed using hypothalamus of mice with 2 methods treatment as well as control group.

2022-05-17 | GSE200820 | GEO

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