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Transcriptional and accessible chromatin profiles during conversion process of alternatively activated macrophages

ABSTRACT: Transcriptional and accessible chromatin profiles during conversion process of alternatively activated macrophages

PROVIDER: PRJNA375110 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5264350_1.fastq.gz	Fastqsanger.gz
	SRR5264350_2.fastq.gz	Fastqsanger.gz
	SRR5264360_1.fastq.gz	Fastqsanger.gz
	SRR5264360_2.fastq.gz	Fastqsanger.gz
	SRR5264351_1.fastq.gz	Fastqsanger.gz

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Transcriptional and accessible chromatin profiles during conversion process of alternatively activated macrophages (RNA-Seq)

Project description:Whether inflammatory macrophages can adopt features of the tissue resident niche and what mechanisms mediate phenotypic conversion remain unclear. In this study, we show by cell surface phenotyping, as well as by RNA-Seq transcriptional profiling and ATAC-Seq open chromatin regions profiling, that inflammatory monocyte can adopt a tissue resident phenotype, which is also accompanied by re-programming of the transcriptional profiles and remodeling of the open chromatin landscape. The conversion process is dependent on Vitamin A, suggesting that Vitamin A deficiency may lead to the failure to resolve inflammation, as inflammatory macrophages accumulate without adopting a tissue residency phenotype.

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Transcriptional and accessible chromatin profiles during conversion process of alternatively activated macrophages (ATAC-Seq)

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Transcriptional and accessible chromatin profiles during conversion process of alternatively activated macrophages

Project description:This SuperSeries is composed of the SubSeries listed below.

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MicroRNA expression in thioglycollate and alternatively activated

Project description:Macrophage activation must be tightly controlled to prevent overzealous responses that cause self-damage. MicroRNAs have been shown to promote classical macrophage activation by blocking concomitant anti-inflammatory signals and transcription factors, but can also place restraints on activation by preventing excessive TLR-signalling. In contrast, the microRNA profile associated with alternatively activated macrophages and their role in regulating wound-healing or anti-helminthic responses has not yet been described. Utilizing an in vivo model of alternative activation, in which adult Brugia malayi nematodes are surgically implanted in the peritoneal cavity of mice, we examined the profile of microRNA expression in these alternatively activated macrophages and compared this to alternatively activated IL-4 receptor knockout macrophages and thioglycollate elicited macrophages. Peritoneal macrophages from BALB/c wild type or IL-4 receptor knockout mice were elicited with thioglycollate or using nemtodes (peritoneal implant of Brugia malayi). The latter leads to a population of alternatively activated macrophages. Microarray analysis was used to examine the microRNA profile of WT alternatively activated macrophages (n = 4), IL-4 receptor knockout alternatively activated macrophages (n = 4), WT thioglycollate elicited macrophages (n = 3) and IL-4 receptor knockout thioglycollate elicited macrophages (n = 3).

2012-08-07 | E-GEOD-35047 | biostudies-arrayexpress

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Mus musculus

Project description:Transcriptional and accessible chromatin profiles during conversion process of alternatively activated macrophages (ATAC-Seq)

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MicroRNA expression in thioglycollate and alternatively activated

2012-08-08 | GSE35047 | GEO

Transcript dynamics in classically and alternatively activated macrophages

Project description:Transcript dynamics in classically and alternatively activated macrophages

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Alternatively activated macrophages

Project description:Similar to asthma, nematode infections are commonly associated with production of Th2 cytokines and hyporesponsive T cells. This T cell phenotype has been reported to be induced by IL-4 dependent macrophages termed alternatively activated macrophages (AAM). Additionally, AAM have been implicated in several pulmonary diseases, including allergic asthma. This study examines the potential importance of AAM as immune regulatory cells in both infectious and noninfectious disease contexts. http://www.hopkins-genomics.org/asthma/asthma006/index.html Keywords: other

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PPARγ activation promotes infiltration of alternatively activated macrophages into adipose tissue.

Project description:Background: Obesity is associated with infiltration of macrophages into adipose tissue. Adipose macrophages may contribute to an elevated inflammatory status by secreting a variety of pro-inflammatory mediators, including TNFalpha and IL-6. Recent data suggest that during diet-induced obesity the phenotype of adipose-resident macrophages changes from alternatively activated macrophages towards a more classical and pro-inflammatory phenotype. Here, we explore the effect of PPARγ-activation on obesity-induced inflammation in 129SV mice fed a high fat diet for 20 weeks. High fat feeding increased bodyweight gain, adipose tissue mass and liver triglycerides. Rosiglitazone treatment further increased adipose mass, reduced liver triglycerides and changed adipose tissue morphology towards smaller adipocytes. Surprisingly, rosiglitazone markedly increased the number of macrophages in adipose tissue, as shown by immunohistochemical analysis and quantification of macrophage marker genes CD68 and F4/80+. In adipose tissue, markers for classically activated macrophages including IL-18 were down regulated whereas markers characteristic for alternatively activated macrophages (Arginase 1, IL-10) were up regulated by rosiglitazone. Importantly, conditioned media from rosiglitazone-treated alternatively activated macrophages neutralized the inhibitory effect of macrophages on 3T3-L1 adipocyte differentiation, suggesting that alternatively activated macrophages may be involved in mediating the effects of rosiglitazone on adipose tissue morphology and mass. Our results suggest that short term rosiglitazone treatment increases infiltration of alternatively activated macrophages in adipose tissue. The alternatively activated macrophages might play a role in PPARγ-dependent expansion and remodeling of adipose tissue. Keywords: metabolic state analysis

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