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Redistribution of EC-SOD due to the R213G SNP reveals differential RNA-seq profile of recruited alveolar macrophages and accelerated apoptosis in response to bleomycin

ABSTRACT: Redistribution of EC-SOD due to the R213G SNP reveals differential RNA-seq profile of recruited alveolar macrophages and accelerated apoptosis in response to bleomycin

PROVIDER: PRJNA524710 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8645865.fastq.gz	Fastqsanger.gz
	SRR8645866.fastq.gz	Fastqsanger.gz
	SRR8645867.fastq.gz	Fastqsanger.gz
	SRR8645868.fastq.gz	Fastqsanger.gz

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Redistribution of EC-SOD due to the R213G SNP reveals differential RNA-seq profile of recruited alveolar macrophages and accelerated apoptosis in response to bleomycin

Project description:A known human SNP in the matrix-binding domain of extracellular superoxide dismutase (EC-SOD), with an arginine to glycine substitution at position 213 (R213G), redistributes EC-SOD from the matrix into extracellular fluids. We reported that, following bleomycin (bleo), knock-in mice harboring the human R213G SNP (R213G mice), compared to wild-type (WT) littermates exhibit enhanced resolution of inflammation and protection against fibrosis. We tested the hypothesis that the EC-SOD R213G SNP promotes resolution via accelerated apoptosis of recruited alveolar macrophage (recAM).

2022-02-01 | GSE127345 | GEO

Redistribution of EC-SOD resolves bleomycin-induced inflammation <i>via</i> increased apoptosis of recruited alveolar macrophages.

Project description:A human single nucleotide polymorphism (SNP) in the matrix-binding domain of extracellular superoxide dismutase (EC-SOD), with arginine to glycine substitution at position 213 (R213G), redistributes EC-SOD from the matrix into extracellular fluids. We reported that, following bleomycin (bleo), knockin mice harboring the human R213G SNP (R213G mice) exhibit enhanced resolution of inflammation and protection against fibrosis, compared with wild-type (WT) littermates. In this study, we tested the hypothesis that the EC-SOD R213G SNP promotes resolution via accelerated apoptosis of recruited alveolar macrophage (AM). RNA sequencing and Ingenuity Pathway Analysis 7 d postbleo in recruited AM implicated increased apoptosis and blunted inflammatory responses in the R213G strain exhibiting accelerated resolution. We validated that the percentage of apoptosis was significantly elevated in R213G recruited AM vs. WT at 3 and 7 d postbleo in vivo. Recruited AM numbers were also significantly decreased in R213G mice vs. WT at 3 and 7 d postbleo. ChaC glutathione-specific γ-glutamylcyclotransferase 1 (Chac1), a proapoptotic γ-glutamyl cyclotransferase that depletes glutathione, was increased in the R213G recruited AM. Overexpression of Chac1 in vitro induced apoptosis of macrophages and was blocked by administration of cell-permeable glutathione. In summary, we provide new evidence that redistributed EC-SOD accelerates the resolution of inflammation through redox-regulated mechanisms that increase recruited AM apoptosis.-Allawzi, A., McDermott, I., Delaney, C., Nguyen, K., Banimostafa, L., Trumpie, A., Hernandez-Lagunas, L., Riemondy, K., Gillen, A., Hesselberth, J., El Kasmi, K., Sucharov, C. C., Janssen, W. J., Stenmark, K., Bowler, R., Nozik-Grayck, E. Redistribution of EC-SOD resolves bleomycin-induced inflammation via increased apoptosis of recruited alveolar macrophages.

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Extracellular superoxide dismutase (EC-SOD) R213G variant reduces mitochondrial ROS and preserves mitochondrial function in bleomycin-induced lung injury: EC-SOD R213G variant and intracellular redox regulation

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