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Comprehensive characterization of hepatic inflammatory changes in a mouse model of alpha-1 antitrypsin deficiency

ABSTRACT: Comprehensive characterization of hepatic inflammatory changes in a mouse model of alpha-1 antitrypsin deficiency

PROVIDER: PRJNA851584 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR19777488_1.fastq.gz	Fastqsanger.gz
	SRR19777488_2.fastq.gz	Fastqsanger.gz
	SRR19777489_1.fastq.gz	Fastqsanger.gz
	SRR19777489_2.fastq.gz	Fastqsanger.gz
	SRR19777490_1.fastq.gz	Fastqsanger.gz

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Comprehensive characterization of hepatic inflammatory changes in a mouse model of alpha-1 antitrypsin deficiency

Project description:In this study, we sought to thoroughly characterize the liver pathophysiology of a human transgenic mouse model for alpha-1 antitrypsin deficiency (AATD) with a strong manifestation of AATD-mediated liver disease. Male and female transgenic mice for normal variant human alpha-1 antitrypsin (Pi*M) and mutant human alpha-1 antitrypsin (Pi*Z) at 3 and 6 months of age with a C57BL/6J background were subjected to study. The progression of hepatic accumulation of mutant alpha-1 antitrypsin (ZAAT), hepatocyte injury, steatosis, liver inflammation and fibrotic features of this mouse model were monitored by performing an in vivo study.

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Project description:Individuals homozygous for the "Z" mutation in alpha-1 antitrypsin deficiency are known to be at increased risk for liver disease. It has also become clear that some degree of risk is similarly conferred by the heterozygous state. A lack of model systems that recapitulate heterozygosity in human hepatocytes has limited the ability to study the impact of a single Z alpha-1 antitrypsin (ZAAT) allele on hepatocyte biology. Here, we describe the derivation of syngeneic induced pluripotent stem cells (iPSCs) engineered to determine the effects of ZAAT heterozygosity in iPSC-hepatocytes (iHeps). We find that heterozygous MZ iHeps exhibit an intermediate disease phenotype and share with ZZ iHeps alterations in AAT protein processing and downstream perturbations including altered endoplasmic reticulum (ER) and mitochondrial morphology, reduced mitochondrial respiration, and branch-specific activation of the unfolded protein response in cell subpopulations. Our model of MZ heterozygosity thus provides evidence that a single Z allele is sufficient to disrupt hepatocyte homeostatic function.

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