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Hepatic follistatin increases basal metabolic rate and attenuates diet-induced obesity during hepatic insulin resistance

ABSTRACT: Hepatic follistatin increases basal metabolic rate and attenuates diet-induced obesity during hepatic insulin resistance

PROVIDER: PRJNA1081951 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR28157654_1.fastq.gz	Fastqsanger.gz
	SRR28157654_2.fastq.gz	Fastqsanger.gz
	SRR28157655_1.fastq.gz	Fastqsanger.gz
	SRR28157655_2.fastq.gz	Fastqsanger.gz
	SRR28157656_1.fastq.gz	Fastqsanger.gz

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Hepatic follistatin increases basal metabolic rate and attenuates diet-induced obesity during hepatic insulin resistance

Project description:Insulin resistance not compensated by secretion reduces energy storage, but little is known about its effect upon energy expenditure (EE). Insulin receptor substrates Irs1 and Irs2 mediate signaling in all tissues, resulting in the inhibition of FoxO transcription factors. We found that hepatic disruption of Irs1 and Irs2 (LDKO mice) attenuated high-fat diet (HFD)-induced obesity and increased whole-body EE in a FoxO1-dependent manner. Hepatic disruption of Fst (follistatin), a FoxO1-regulated hepatokine, normalized EE in LDKO mice and restored adipose mass during HFD consumption. Moreover, hepatic Fst disruption alone increased fat mass accumulation, whereas hepatic overexpression of Fst attenuated high HFD-induced obesity. Excess circulating Fst in overexpressing mice neutralized Mstn (myostatin), activating mTORC1-promoted pathways of nutrient uptake and EE in skeletal muscle. Similar to Fst overexpression, direct activation of muscle mTORC1 also reduced adipose mass. We conclude that Fst-promoted EE in muscle attenuates obesity during hepatic insulin resistance.

2024-02-29 | GSE260531 | GEO

Hepatic follistatin increases basal metabolic rate and attenuates diet-induced obesity during hepatic insulin resistance.

Project description:ObjectiveBody weight change and obesity follow the variance of excess energy input balanced against tightly controlled EE (energy expenditure). Since insulin resistance can reduce energy storage, we investigated whether genetic disruption of hepatic insulin signaling reduced adipose mass with increased EE.MethodsInsulin signaling was disrupted by genetic inactivation of Irs1 (Insulin receptor substrate 1) and Irs2 in hepatocytes of LDKO mice (Irs1L/L·Irs2L/L·CreAlb), creating a state of complete hepatic insulin resistance. We inactivated FoxO1 or the FoxO1-regulated hepatokine Fst (Follistatin) in the liver of LDKO mice by intercrossing LDKO mice with FoxO1L/L or FstL/L mice. We used DEXA (dual-energy X-ray absorptiometry) to assess total lean mass, fat mass and fat percentage, and metabolic cages to measure EE (energy expenditure) and estimate basal metabolic rate (BMR). High-fat diet was used to induce obesity.ResultsHepatic disruption of Irs1 and Irs2 (LDKO mice) attenuated HFD (high-fat diet)-induced obesity and increased whole-body EE in a FoxO1-dependent manner. Hepatic disruption of the FoxO1-regulated hepatokine Fst normalized EE in LDKO mice and restored adipose mass during HFD consumption; moreover, hepatic Fst disruption alone increased fat mass accumulation, whereas hepatic overexpression of Fst reduced HFD-induced obesity. Excess circulating Fst in overexpressing mice neutralized Mstn (Myostatin), activating mTORC1-promoted pathways of nutrient uptake and EE in skeletal muscle. Similar to Fst overexpression, direct activation of muscle mTORC1 also reduced adipose mass.ConclusionsThus, complete hepatic insulin resistance in LDKO mice fed a HFD revealed Fst-mediated communication between the liver and muscle, which might go unnoticed during ordinary hepatic insulin resistance as a mechanism to increase muscle EE and constrain obesity.

| S-EPMC10033741 | biostudies-literature

Follistatin dysregulates systemic glucose homeostasis during hepatic insulin resistance

Project description:Follistatin dysregulates systemic glucose homeostasis during hepatic insulin resistance

| PRJNA438228 | ENA

Changes in follistatin levels by BRCA1 may serve as a regulator of ovarian carcinogenesis

Project description:Follistatin is a folliculogenesis regulating protein that has been found in relatively high concentration in the female ovarian tissues. Follistatin acts as an antagonist to the function of Activin, which is often found elevated in ovarian carcinogenesis and thus presents a possibility for therapeutic intervention in controlling ovarian cancer. Most of the ovarian cancer occurs in its ovarian surface epithelium (OSE) cells. Although breast cancer susceptibility gene 1 (BRCA1) is a known tumor suppressor for breast cancer but its role in ovarian cancer is beginning to unfold. We have shown that in ovarian carcinoma cells (SKOV3), stable overexpression of BRCA1 stimulates Follistatin secretion and simultaneously downregulates Activin expression. Moreover, knock down of BRCA1 in immortalized OSE (IOSE) cells from human ovarian tissue demonstrates downregulation of Follistatin secretion with simultaneous up regulation of Activin expression. IOSE cells generated from an ovarian cancer patient with BRCA1 mutation failed to secrete Follistatin in the medium. Our results indicate a novel function for BRCA1 in the form of regulation of the expression of Follistatin in the ovarian cells.

2011-07-02 | GSE30296 | GEO

Changes in follistatin levels by BRCA1 may serve as a regulator of ovarian carcinogenesis

2011-07-02 | E-GEOD-30296 | biostudies-arrayexpress

The m6A methyltransferase Mettl3 deficiency attenuates hepatic stellate cell activation and liver fibrosis

Project description:The m6A methyltransferase Mettl3 deficiency attenuates hepatic stellate cell activation and liver fibrosis

| PRJNA857659 | ENA

Inactivating hepatic follistatin alleviates hyperglycemia.

Project description:Unsuppressed hepatic glucose production (HGP) contributes substantially to glucose intolerance and diabetes, which can be modeled by the genetic inactivation of hepatic insulin receptor substrate 1 (Irs1) and Irs2 (LDKO mice). We previously showed that glucose intolerance in LDKO mice is resolved by hepatic inactivation of the transcription factor FoxO1 (that is, LTKO mice)-even though the liver remains insensitive to insulin. Here, we report that insulin sensitivity in the white adipose tissue of LDKO mice is also impaired but is restored in LTKO mice in conjunction with normal suppression of HGP by insulin. To establish the mechanism by which white adipose tissue insulin signaling and HGP was regulated by hepatic FoxO1, we identified putative hepatokines-including excess follistatin (Fst)-that were dysregulated in LDKO mice but normalized in LTKO mice. Knockdown of hepatic Fst in the LDKO mouse liver restored glucose tolerance, white adipose tissue insulin signaling and the suppression of HGP by insulin; however, the expression of Fst in the liver of healthy LTKO mice had the opposite effect. Of potential clinical significance, knockdown of Fst also improved glucose tolerance in high-fat-fed obese mice, and the level of serum Fst was reduced in parallel with glycated hemoglobin in obese individuals with diabetes who underwent therapeutic gastric bypass surgery. We conclude that Fst is a pathological hepatokine that might be targeted for diabetes therapy during hepatic insulin resistance.

| S-EPMC6039237 | biostudies-literature

Gene expression profiling of regenerating planarian tails after inhibition of myoD and follistatin

Project description:MyoD is a conserved myogenic factor which controls formation of longitundinal muscle in planarians. myoD(RNAi) animals do not regenerate after amputation due to the lack of expression of a conserved TGF-beta inhibitor follistatin.

2017-11-22 | GSE99026 | GEO

Quiescent ovarian cancer cells, in response to chemotherapy, secrete follistatin to induce chemotherapy resistance in surrounding cells.

Project description:We sought to identify mechanism of NFATC4 quiescence-driven chemoresistance. RNA-Seq identified upregulation of follistatin (FST) in quiescent OvCa cells.

2022-08-10 | GSE210439 | GEO

Comparative Proteomic and Transcriptomic Analysis of Follistatin-induced Skeletal Muscle Hypertrophy

Project description:Skeletal muscle, the most abundant body’s tissue, plays vital roles in locomotion and metabolism. Myostatin is a negative regulator of skeletal muscle mass. In addition to increase muscle mass, Myostatin inhibition impacts on muscle contractility and energy metabolism. To decipher the mechanisms of action of the Myostatin inhibitors, we used proteomic and transcriptomic approaches to investigate the changes induced in skeletal muscles of transgenic mice overexpressing Follistatin, a physiological Myostatin inhibitor. Our proteomic workflow included a fractionation step to identify weakly expressed proteins and a comparison of fast versus slow muscles. Functional annotation of altered proteins supports the phenotypic changes induced by Myostatin inhibition, including modifications in energy metabolism, fiber type, insulin and calcium signaling, as well as membrane repair and regeneration. Less than 10% of the differentially expressed proteins were found to be also regulated at the mRNA level but the Biological Process annotation and the KEGG pathways analysis of transcriptomic results showed a great concordance with the proteomic data. Thus, this study describes the most extensive omics analysis of muscle overexpressing Follistatin, providing molecular-level insights to explain the observed muscle phenotypic changes

2017-08-17 | PXD005899 | Pride

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