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RNA-seq expression profiling of ductal macrophages and antigen presenting cells from virgin mouse mammary glands

ABSTRACT: RNA-seq expression profiling of ductal macrophages and antigen presenting cells from virgin mouse mammary glands

PROVIDER: PRJNA490510 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7822440_1.fastq.gz	Fastqsanger.gz
	SRR7822440_2.fastq.gz	Fastqsanger.gz
	SRR7822441_1.fastq.gz	Fastqsanger.gz
	SRR7822441_2.fastq.gz	Fastqsanger.gz
	SRR7822442_1.fastq.gz	Fastqsanger.gz

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RNA-seq expression profiling of ductal macrophages and antigen presenting cells from virgin mouse mammary glands

Project description:Macrophages are diverse immune cells that reside in all tissues to regulate development, function and homeostasis. In the mammary gland, a highly dynamic organ that undergoes dramatic remodeling throughout life, macrophages have been implicated in development and breast tumorigenesis. Ductal macrophages, as opposed to their stromal counterparts, were found to promote ductal morphogenesis during puberty and efficiently phagocytose alveolar cells post-lactation. Within mammary tumors, only ductal macrophages expanded to form a network throughout the tumor, where they also contact intra-tumoral T cells. Furthermore, ductal macrophages accelerated the growth of tumor organoids. Thus, pro-remodeling mammary ductal macrophages represent the normal tissue counterpart of tumor macrophages in an organ that is highly susceptible to oncogenesis. To gain insight into ductal macrophage function, we sorted all antigen presenting cell populations from mouse mammary glands and undertook RNA-seq expression profiling. This showed that ductal macrophages have a distinct expression profile from those of stromal macrophages or dendritic cells from the mammary gland. Results from this data series are presented in Figure 2 of Dawson et al (2020).

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Project description:Macrophages are diverse immune cells that reside in all tissues. Although macrophages have been implicated in mammary gland function, their diversity has not been fully addressed. By exploiting high-resolution 3D imaging and flow cytometry, we have identified a unique population of tissue-resident ductal macrophages (DMs) that form a contiguous network between the luminal and basal layers of the entire mammary gland throughout post-natal development. DMs are long-lived and constantly survey the epithelium though dendrite movement based on advanced 3D intravital imaging. While they initially originate from embryonic precursors, DMs derive from monocytes as they expand during puberty. Moreover, they undergo proliferation in pregnancy to maintain complete coverage of the epithelium in lactation, where they are poised to phagocytose milk-producing cells post-lactation and facilitate remodelling. Interestingly, DMs strongly resemble mammary tumour macrophages and form a network that pervades the tumour epithelium. Thus, the mammary epithelium programs specialised resident macrophages in both physiological and tumorigenic contexts. RNA-seq profiling demonstrates that DMs have a distinct gene expression signature from stromal macrophages or mammary-resident antigen-presenting cells and that substantial expression changes occur as DMs proliferate during pregnancy and lactation. This SuperSeries is composed of the SubSeries listed below.

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RNA-seq profiling of mammary duct macrophages from virgin, pregnant, lactating and post-weaning mice

Project description:Macrophages are diverse immune cells that reside in all tissues. Although macrophages have been implicated in mammary gland function, their diversity has not been fully addressed. By exploiting high-resolution 3D imaging and flow cytometry, we have identified a unique population of tissue-resident ductal macrophages (DMs) that form a contiguous network between the luminal and basal layers of the entire mammary gland throughout post-natal development. DMs are long-lived and constantly survey the epithelium though dendrite movement based on advanced 3D intravital imaging. While they initially originate from embryonic precursors, DMs derive from monocytes as they expand during puberty. Moreover, they undergo proliferation in pregnancy to maintain complete coverage of the epithelium in lactation, where they are poised to phagocytose milk-producing cells post-lactation and facilitate remodelling. Interestingly, DMs strongly resemble mammary tumour macrophages and form a network that pervades the tumour epithelium. Thus, the mammary epithelium programs specialised resident macrophages in both physiological and tumorigenic contexts. To explore expression changes as DMs profilerate in pregnancy and lactation, we sorted DMs from the mouse mammary glands of virgin, pregnant, lactating and post-weaning mice and undertook RNA-seq profiling. Results from this data series are shown in Figure 5 of Dawson et al (2020).

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