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Yap regulates glucose utilization and sustains nucleotide synthesis to enable organ growth

ABSTRACT: Yap regulates glucose utilization and sustains nucleotide synthesis to enable organ growth

PROVIDER: PRJNA487785 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7751610_1.fastq.gz	Fastqsanger.gz
	SRR7751610_2.fastq.gz	Fastqsanger.gz
	SRR7751611_1.fastq.gz	Fastqsanger.gz
	SRR7751611_2.fastq.gz	Fastqsanger.gz
	SRR7751612_1.fastq.gz	Fastqsanger.gz

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Yap regulates glucose utilization and sustains nucleotide synthesis to enable organ growth

Project description:The Hippo pathway and its nuclear effector Yap regulate organ size and cancer formation. While many modulators of Hippo activity have been identified, little is known about how Yap target genes mediate these growth effects. Here, we show that defects in hepatic progenitor potential and liver growth in yap-/- mutant zebrafish are caused by impaired glucose transport and nucleotide biosynthesis: transcriptomic and metabolomic analyses reveal that Yap directly regulates expression of glucose transporter glut1, causing decreased glycolytic flux into anabolic nucleotide biosynthesis in yap-/- mutants and impaired glucose tolerance in adults. Nucleotide supplementation improved Yap-deficient phenotypes, indicating functional importance of glucose-fuelled nucleotide biosynthesis. Yap-regulated Glut1 expression and glucose uptake are conserved in mammals. Our results identify Glut1 as a direct Yap target enhancing glucose uptake and utilization for anabolic nucleotide biosynthesis, which are required for organ growth. Our findings demonstrate the central role of Hippo signalling in metabolic homeostasis

2018-08-25 | GSE119024 | GEO

Yap regulates glucose utilization and sustains nucleotide synthesis to enable organ growth.

Project description:The Hippo pathway and its nuclear effector Yap regulate organ size and cancer formation. While many modulators of Hippo activity have been identified, little is known about the Yap target genes that mediate these growth effects. Here, we show that yap-/- mutant zebrafish exhibit defects in hepatic progenitor potential and liver growth due to impaired glucose transport and nucleotide biosynthesis. Transcriptomic and metabolomic analyses reveal that Yap regulates expression of glucose transporter glut1, causing decreased glucose uptake and use for nucleotide biosynthesis in yap-/- mutants, and impaired glucose tolerance in adults. Nucleotide supplementation improves Yap deficiency phenotypes, indicating functional importance of glucose-fueled nucleotide biosynthesis. Yap-regulated glut1 expression and glucose uptake are conserved in mammals, suggesting that stimulation of anabolic glucose metabolism is an evolutionarily conserved mechanism by which the Hippo pathway controls organ growth. Together, our results reveal a central role for Hippo signaling in glucose metabolic homeostasis.

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Yap reprograms glutamine metabolism to increase nucleotide biosynthesis and enable liver growth

Project description:The Hippo pathway is an important regulator of organ size and tumorigenesis. It is unclear, however, how Hippo signaling provides the cellular building blocks required for rapid growth. Here, we report that transgenic zebrafish expressing an activated form of the Hippo pathway effector Yap1 develop enlarged livers and are prone to liver tumor formation. Transcriptomic profiling reveals that Yap1 reprograms genes involved in glutamine metabolism. Analysis of gene expression in WT and lf:Yap transgenic zebrafish livers.

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Yap reprograms glutamine metabolism to increase nucleotide biosynthesis and enable liver growth.

Project description:The Hippo pathway is an important regulator of organ size and tumorigenesis. It is unclear, however, how Hippo signalling provides the cellular building blocks required for rapid growth. Here, we demonstrate that transgenic zebrafish expressing an activated form of the Hippo pathway effector Yap1 (also known as YAP) develop enlarged livers and are prone to liver tumour formation. Transcriptomic and metabolomic profiling identify that Yap1 reprograms glutamine metabolism. Yap1 directly enhances glutamine synthetase (glul) expression and activity, elevating steady-state levels of glutamine and enhancing the relative isotopic enrichment of nitrogen during de novo purine and pyrimidine biosynthesis. Genetic or pharmacological inhibition of GLUL diminishes the isotopic enrichment of nitrogen into nucleotides, suppressing hepatomegaly and the growth of liver cancer cells. Consequently, Yap-driven liver growth is susceptible to nucleotide inhibition. Together, our findings demonstrate that Yap1 integrates the anabolic demands of tissue growth during development and tumorigenesis by reprogramming nitrogen metabolism to stimulate nucleotide biosynthesis.

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