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The effects of weight cycling on the metabolic homeostasis

ABSTRACT: The effects of weight cycling on the metabolic homeostasis

PROVIDER: PRJNA554798 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9693034_1.fastq.gz	Fastqsanger.gz
	SRR9693034_2.fastq.gz	Fastqsanger.gz
	SRR9693035_1.fastq.gz	Fastqsanger.gz
	SRR9693035_2.fastq.gz	Fastqsanger.gz
	SRR9693036_1.fastq.gz	Fastqsanger.gz

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The effects of weight cycling on the metabolic homeostasis

Project description:Purpose: To investigate the effects of weight cycling on the metabolic homeostasis Methods: C57BL/6 mice were fed with high fat diet (HF) (60% kcal fat; Research Diets Inc., New Brunswick, NJ) or low fat diet (LF) (10% kcal fat; Research Diets Inc.) at 6-week-old. Nine weeks after in HF, a part of mice was switched to LF for one week followed by one week HF as one cycle, and the mice under this one week diet switch protocol for 10 cycles were named HF-LF cycled mice, while the left part of mice under continuously HF-feeding were named HF mice. The mice kept in the continuously LF-feeding were named LF mice Results: We identified many changed genes in the eWAT by RNA-sequencing. Conclusions: This finding provides a signaling in eWAT upon weight cycling

2021-09-30 | GSE134336 | GEO

RNA-seq: weight cycling time series (eWAT)

Project description:Gene expression change on weight cycling mice eWAT

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Weight cycling impairs pancreatic insulin secretion but does not perturb whole-body insulin action in diet-induced obese mice

Project description:In the setting of obesity and insulin resistance, glycemia is controlled in part by beta cell compensation and subsequent hyperinsulinemia. Weight loss improves glycemia and decreases hyperinsulinemia, whereas weight cycling worsens glycemic control. The mechanisms responsible for weight cycling-induced deterioration in glucose homeostasis are poorly understood. Thus, we aimed to pinpoint the main regulatory junctions at which weight cycling alters glucose homeostasis in mice. Using in vivo and ex vivo procedures we show that despite having worsened glucose tolerance, weight-cycled mice do not manifest impaired whole-body insulin action. Instead, weight cycling reduces insulin secretory capacity in vivo during clamped hyperglycemia and ex vivo in perifused islets. Islets from weight-cycled mice have reduced expression of drivers of b-cell identity (Mafa, Pdx1, Nkx6.1, Ucn3) and lower islet insulin content, compared to those from obese mice, suggesting inadequate transcriptional and posttranscriptional response to repeated nutrient overload. Collectively, these data support a model in which pancreatic plasticity is challenged in the face of large fluctuations in body weight resulting in a mismatch between glycemia and insulin secretion in mice.

2022-11-09 | GSE202697 | GEO

Multiomics reveals persistence of obesity-associated immune cell phenotypes in adipose tissue during weight loss and subsequent weight regain

Project description:Most individuals do not maintain weight loss, and weight regain increases cardio-metabolic risk beyond that of obesity. Adipose inflammation directly contributes to insulin resistance; however, immune-related changes that occur with weight loss and weight regain are not well understood. Single cell RNA-sequencing was completed with CITE-sequencing and biological replicates to profile changes in murine immune subpopulations following obesity, weight loss, and weight cycling. Weight loss normalized glucose tolerance, however, type 2 immune cells did not repopulate adipose following weight loss. Many inflammatory populations persisted with weight loss and increased further following weight regain. Obesity drove T cell exhaustion and broad increases in antigen presentation, lipid handing, and inflammation that persisted with weight loss and weight cycling. This work provides critical groundwork for understanding the immunological causes of weight cycling-accelerated metabolic disease.

2022-03-04 | GSE182233 | GEO

Isolating Independent Effects of Diet/Energy Balance and Body Weight on Behavior and Metabolic Health

Project description:Associated with numerous metabolic and behavioral abnormalities, obesity is classified by metrics reliant on body weight (such as body mass index). However, overnutrition is the common cause of obesity, and may independently contribute to these obesity-related abnormalities. The goal of this study is to isolate ‘diet/energy balance’ effects independent from ‘body weight’ effects on various metabolic and behavioral parameters using the Diet Switch feeding paradigm in mice. [We conducted] unbiased gene expression analysis of the nutrient-sensing circumventricular hypothalamus [using RNA-seq]. Remarkably, only two genes responded to diet/energy balance (neuropeptide y [npy] and agouti-related peptide [agrp]), while others were related only to body weight. Furthermore, linear regression models revealed that npy and agrp showed similar modifiability by diet/energy balance and body weight compared to electroencephalographic-measured sleep/wake behavior.

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Effects on transcriptional regulation and lipid droplet characteristics in the liver of female juvenile pigs after early postnatal feed restriction and refeeding are dependent on birth weight

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Project description:Introduction: Obesity is a major risk factor associated with multiple pathological conditions including diabetes and cardiovascular disease. Endothelial dysfunction is an early predictor of obesity. However, little is known regarding how early endothelial changes trigger obesity. In the present work we report a novel endothelial-mediated mechanism essential for regulation of metabolic homeostasis, driven by c-Myc. Methods: We used conditional overexpression (EC-Myc OE) mouse models to investigate the role of endothelial-specific c-Myc in metabolic homeostasis during high-fat diet exposure. Body weight, metabolic parameters and cardiovascular function were collected over time and tissue samples collected at endpoint for biochemical, pathology and RNA-sequencing analysis. Results: In the present study we demonstrate that Overexpression of endothelial c-Myc attenuated diet-induced obesity and visceral fat accumulation and prevented the development of glucose tolerance and cardiac dysfunction. Transcriptome analysis of skeletal muscle suggests that the protective effects promoted by endothelial c-Myc overexpression are associated with the expression of genes known to increase weight loss, energy expenditure and glucose tolerance. Discussion: Our results show a novel important role for endothelial c-Myc in regulating metabolic homeostasis and suggests its potential targeting in preventing obesity and associated complications such as diabetes type-2 and cardiovascular dysfunction.

2024-05-31 | GSE267493 | GEO

The effect of progressive weight loss on metabolic function

Project description:The purpose of this study was to evaluate the effect of progressive weight loss (5, 10, 15% weight loss) on metabolic function such as multi-organ insulin sensitivity and beta-cell function in obese people. We conducted microarray analysis to determine the effect of progressive weight loss on adipose tissue gene expression profile. We examined subcuntaneous adipose tissue samples obtained from 9 obese subjects before (A) and after 5% (B), 10% (C) and 15% (D) weight loss (total 36 samples).

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Maternal weight affects placental DNA methylation of genes invovled in metabolic pathways in the common marmoset monkey (Callithrix jacchus)

Project description:Accumulating evidence suggests that dysregulation of placental DNA methylation (DNAm) is a mechanism linking maternal weight during pregnancy to metabolic programming outcomes. The common marmoset, Callithrix jaccus, is a platyrrhine primate species that has provided much insight into studies of the primate placenta, maternal condition, and metabolic programming, yet the relationships between maternal weight and placental DNAm are unknown. Here, we report genome-wide DNAm from term marmoset placentas using reduced representation bisulfite sequencing. We identified 74 genes whose DNAm pattern is associated with maternal weight during gestation. These genes are predominantly involved in energy metabolism and homeostasis, including regulation of glycolytic and lipid metabolic processes pathways.

2020-01-07 | GSE143200 | GEO

Isolating Independent Effects of Diet/Energy Balance and Body Weight on Behavior and Metabolic Health

Project description:Isolating Independent Effects of Diet/Energy Balance and Body Weight on Behavior and Metabolic Health

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