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The effects of MuRF1 knockout, sex, and a high fat diet consumption on gastrocnemius muscle transcriptomics.

ABSTRACT: The effects of MuRF1 knockout, sex, and a high fat diet consumption on gastrocnemius muscle transcriptomics.

PROVIDER: PRJNA742471 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14996504_1.fastq.gz	Fastqsanger.gz
	SRR14996504_2.fastq.gz	Fastqsanger.gz
	SRR14996505_1.fastq.gz	Fastqsanger.gz
	SRR14996505_2.fastq.gz	Fastqsanger.gz
	SRR14996506_1.fastq.gz	Fastqsanger.gz

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The effects of MuRF1 knockout, sex, and a high fat diet consumption on gastrocnemius muscle transcriptomics.

Project description:MuRF1 is an E3 ubiquitin ligase known to play a role in skeletal muscle atrophy. Our objectives in this study were to gain further insight into the roles MuRF1 plays in skeletal muscle and to determine if this is influenced by sex and/or consumption of a high fat diet. To address these objectives we used RNA sequencing to analyze the transcriptome of gastrocnemius muscle from 30 week old, MuRF1 knockout (-/-) and wild type, male and female mice fed a chow or high fat diet (HFD).

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Sex Differences in the Skeletal Muscle Response to a High Fat, High Sucrose Diet in Rats

Project description:Men are diagnosed with type 2 diabetes at lower body mass indexes than women; the role of skel-etal muscle in this sex difference is poorly understood. Type 2 diabetes impacts skeletal muscle, particularly in females who demonstrate a lower oxidative capacity compared to males. To ad-dress mechanistic differences underlying this sex disparity, we investigated skeletal muscle mito-chondrial respiration in female and male rats in response to chronic high-fat, high-sugar (HFHS) diet consumption. Four-week-old Wistar Rats were fed a standard chow or HFHS diet for 14 weeks to identify sex-specific adaptations in mitochondrial respirometry and characteristics, transcrip-tional patterns, and protein profiles. Fat mass was greater with the HFHS diet in both sexes when controlled for body mass (p < 0.0001). Blood glucose and insulin resistance were greater in males (p = 0.01) and HFHS-fed rats (p < 0.001). HFHS-fed males had higher mitochondrial respiration compared with females (p < 0.01 sex/diet interaction). No evidence of a difference by sex or diet was found for mitochondrial synthesis, dynamics, or quality to support the mitochondrial respi-ration sex/diet interaction. However, transcriptomic analyses indicate sex differences in nutrient handling. Sex-specific differences occurred in PI3K/AKT signaling, PPARα/RXRα, and triacyl-glycerol degradation. These findings may provide insight into the clinical sex differences in body mass index threshold for diabetes development and tissue-specific progression of insulin re-sistance.

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Project description:The objective of the experiment was to dissect the effects of a high-fat diet on juvenile adipose tissue gene expression under conditions of excess calorie intake versus normal calorie intake in comparison to a standard low-fat diet. For this purpose juvenile mice were fed (A) a standard low-fat diet (CD), (B) a high-fat diet ad libitum (excess calorie intake) (HFD) and (C) a high-fat diet with calorie consumption restricted to the calorie consumption of the CD diet (R-HFD). RNA expression was profiled after 1 week of feeding in the periuterine fat depot.

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