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Liver Epithelial Focal Adhesion Kinase Modulates Fibrogenesis and Hedgehog Signaling

ABSTRACT: Liver Epithelial Focal Adhesion Kinase Modulates Fibrogenesis and Hedgehog Signaling

PROVIDER: PRJNA660335 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12550400_1.fastq.gz	Fastqsanger.gz
	SRR12550400_2.fastq.gz	Fastqsanger.gz
	SRR12550401_1.fastq.gz	Fastqsanger.gz
	SRR12550401_2.fastq.gz	Fastqsanger.gz
	SRR12550402_1.fastq.gz	Fastqsanger.gz

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Liver Epithelial Focal Adhesion Kinase Modulates Fibrogenesis and Hedgehog Signaling

Project description:Focal adhesion kinase (FAK) is an important mediator of extracellular matrix-integrin mechano-signal transduction that regulates cell motility, survival, and proliferation. As such, FAK is being investigated as a potential therapeutic target for malignant and fibrotic diseases, and numerous clinical trials of FAK inhibitors are underway. The function of FAK in non-malignant non-motile epithelial cells is not well understood. We previously showed that hepatocytes demonstrated activated FAK near stiff collagen tracts in fibrotic liver. In this study, we examined the role of liver epithelial FAK by inducing fibrotic liver disease in mice with liver epithelial FAK deficiency. We found that mice that lack FAK in liver epithelial cells develop more severe liver injury and worse fibrosis as compared to controls. Increased fibrosis in liver epithelial FAK-deficient mice is linked to the activation of several pro-fibrotic pathways, including the hedgehog-smoothened pathway. FAK-deficient hepatocytes produce increased Indian hedgehog in a matrix stiffness-dependent manner. Furthermore, there is increased expression of the hedgehog receptor, smoothened, in macrophages and biliary cells of hepatocyte-specific FAK-deficient fibrotic liver. These results indicate that liver epithelial FAK has important regulatory roles in the response to liver injury and progression of fibrosis.

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Liver epithelial focal adhesion kinase modulates fibrogenesis and hedgehog signaling.

Project description:Focal adhesion kinase (FAK) is an important mediator of extracellular matrix-integrin mechano-signal transduction that regulates cell motility, survival, and proliferation. As such, FAK is being investigated as a potential therapeutic target for malignant and fibrotic diseases, and numerous clinical trials of FAK inhibitors are underway. The function of FAK in nonmalignant, nonmotile epithelial cells is not well understood. We previously showed that hepatocytes demonstrated activated FAK near stiff collagen tracts in fibrotic livers. In this study, we examined the role of liver epithelial FAK by inducing fibrotic liver disease in mice with liver epithelial FAK deficiency. We found that mice that lacked FAK in liver epithelial cells developed more severe liver injury and worse fibrosis as compared with controls. Increased fibrosis in liver epithelial FAK-deficient mice was linked to the activation of several profibrotic pathways, including the hedgehog/smoothened pathway. FAK-deficient hepatocytes produced increased Indian hedgehog in a manner dependent on matrix stiffness. Furthermore, expression of the hedgehog receptor, smoothened, was increased in macrophages and biliary cells of hepatocyte-specific FAK-deficient fibrotic livers. These results indicate that liver epithelial FAK has important regulatory roles in the response to liver injury and progression of fibrosis.

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Project description:The goal of this study was to identify transcripts, which are differentially regulatulated in the presence and absence of Focal Adhesion Kinase. As Focal Adhesion Kinase activity can depend upon cell density (Snijder et al. Nature 2009), biological replicates where cells, were seeded very sparsely or confluently, were used. Focal Adhesion Kinase Knockout (ATCC CRL-2644) and Rescue Cells (Sieg et al. 1998, clone DA2) were seeded at two different concentrations. Replicas refer to biological replicates, performed on different days. Only one single technical replicate has been done per biological replicate.

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