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Curative and beta cell regenerative effects of alpha1 antitrypsin treatment in autoimmune diabetic NOD mice

ABSTRACT: In this study, we performed the gene expression analysis of the Normal, Diabetic and AAT treated NOD mice to elucidate the transcriptional changes induced by AAT. This will assist in identifying the biological processes / pathways involved in curative mechanism of AAT. Keywords: alpha1 antitrypsin treatment

ORGANISM(S): Mus musculus

PROVIDER: GSE10478 | GEO | 2008/12/31

SECONDARY ACCESSION(S): PRJNA108039

REPOSITORIES: GEO

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Transcription profiling of mouse autoimmune and diabetic NOF animals reveals the curative and beta cell regenerative effects of alpha1 antitrypsin treatment

Project description:In this study, we performed the gene expression analysis of the Normal, Diabetic and AAT treated NOD mice to elucidate the transcriptional changes induced by AAT. This will assist in identifying the biological processes / pathways involved in curative mechanism of AAT. Experiment Overall Design: Duplicate samples of Normal, Diabetic and AAT treated NOD mice were analyzed.

2009-01-14 | E-GEOD-10478 | biostudies-arrayexpress

Mice inflammatory responses to inhaled aerosolized LPS: effects of various forms of human alpha1-antitrypsin

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Transcription profiling of mouse (6 wk) inducibly expresssing human alpha1-antitrypsin in the liver

Project description:In the classical form of Î±1antitrypsin deficiency a mutant protein accumulates in a polymerized form in the ER of liver cells causing liver damage and carcinogenesis by a gain-of-toxic function mechanism. Recent studies have indicated that the accumulation of mutant Î±1antitrypsin Z in the ER specifically activates the autophagic response but not the unfolded protein response and that autophagy plays a critical role in disposal of insoluble Î±1antitrypsin Z. In this study, we used genomic analysis of the liver in a novel transgenic mouse model with inducible expression to screen for changes in gene expression that would potentially define how the liver responds to accumulation of this mutant protein. Experiment Overall Design: Liver RNA from juvenile (6 wk old) male mice inducibly expressing human alpha1-antitrypsin wild type (M) or mutant (Z) form exclusively in the liver was subjected to genomic analysis. Groups: mutant AAT (Z), wild type AAT (M), expressing (4), non-expressing (1); 3 biological replicates/each group. Experiment Overall Design: Groups: mutant AAT (Z), wild type AAT (M), expressing (4), non-expressing (1); 3 biological replicates/each group, all males, 6 weeks of age

2008-06-16 | E-GEOD-8600 | biostudies-arrayexpress

Transcription profiling of mouse transgenics (3 mo) inducibly expresssing human alpha1-antitrypsin in the liver

Project description:In the classical form of Î±1antitrypsin deficiency a mutant protein accumulates in a polymerized form in the ER of liver cells causing liver damage and carcinogenesis by a gain-of-toxic function mechanism. Recent studies have indicated that the accumulation of mutant Î±1antitrypsin Z in the ER specifically activates the autophagic response but not the unfolded protein response and that autophagy plays a critical role in disposal of insoluble Î±1antitrypsin Z. In this study, we used genomic analysis of the liver in a novel transgenic mouse model with inducible expression to screen for changes in gene expression that would potentially define how the liver responds to accumulation of this mutant protein. Experiment Overall Design: Liver RNA from adult (3 mo old) male mice inducibly expressing human alpha1-antitrypsin wild type (M) or mutant (Z) form exclusively in the liver was subjected to genomic analysis. Groups: mutant AAT (Z), wild type AAT (M), expressing (4), non-expressing (1), wild type littermates (WT); 3 biological replicates/each group

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Curative and beta cell regenerative effects of alpha1-antitrypsin treatment in autoimmune diabetic NOD mice.

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Calreticulin enhances the secretory trafficking of a polymerogenic alpha1-antitrypsin

Project description:α-1-antitrypsin (AAT) regulates protease activity in the lungs and liver. The presence of one or more copies of a mutant Z allele (AAT (E342K), called ATZ), results in low serum levels of ATZ along with intracellular inclusions of polymeric forms, causing lung emphysema and liver cirrhosis. Our experiments show that calreticulin (CRT), an endoplasmic reticulum (ER) glycoprotein chaperone, promotes the secretory trafficking of ATZ, enhancing the media to cell ratio. This effect is more specific for ATZ compared with AAT, and is only partially dependent on the glycan-binding site of CRT. The CRT-related chaperone calnexin (CNX) does not promote enhanced ATZ secretory trafficking, despite the higher cellular abundance of CNX-ATZ complexes. CRT deficiency alters the distributions of ATZ-ER chaperone complexes, increasing ATZ-BiP binding and inclusion body (IB) formation, and reducing ATZ interactions with components required for ER-Golgi trafficking. These findings indicate a novel role for CRT in promoting the secretory trafficking of a polymerogenic protein. Inefficient secretory trafficking of ATZ in the absence of CRT is coincident with enhanced accumulation of ER-derived ATZ IBs.

2020-09-24 | PXD020562 | Pride

The delivery of alpha1-antitrypsin therapy through transdermal route: is this worse to explore?

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Candida albicans: control vs. alpha1-antitrypsin (AAT) treatment

Project description:Transcriptional profiling of Candida albicans SC5314 comparing C. albicans grown in RPMI1640 or in RPMI1640 with 100ug/ml AAT. Goal was to determine the effects of AAT on global C. albicans gene expression.

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Expression data from transgenic mice (3 mo) inducibly expressing human alpha1-antitrypsin in the liver

Project description:In the classical form of α1antitrypsin deficiency a mutant protein accumulates in a polymerized form in the ER of liver cells causing liver damage and carcinogenesis by a gain-of-toxic function mechanism. Recent studies have indicated that the accumulation of mutant α1antitrypsin Z in the ER specifically activates the autophagic response but not the unfolded protein response and that autophagy plays a critical role in disposal of insoluble α1antitrypsin Z. In this study, we used genomic analysis of the liver in a novel transgenic mouse model with inducible expression to screen for changes in gene expression that would potentially define how the liver responds to accumulation of this mutant protein. Keywords: genomic analysis, alpha1-antitrypsin deficiency, comparative study, adult animals, inducible expression, liver specific

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