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Quantitative Analysis of Wild Type and the newly generated CRISPR/Cas9 Hpn-/- mouse mammary gland gene expression analysis

ABSTRACT: Quantitative Analysis of Wild Type and the newly generated CRISPR/Cas9 Hpn-/- mouse mammary gland gene expression analysis

PROVIDER: PRJNA691035 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13397524.fastq.gz	Fastqsanger.gz
	SRR13397525.fastq.gz	Fastqsanger.gz
	SRR13397526.fastq.gz	Fastqsanger.gz
	SRR13397527.fastq.gz	Fastqsanger.gz
	SRR13397528.fastq.gz	Fastqsanger.gz

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Quantitative Analysis of Wild Type and the newly generated CRISPR/Cas9 Hpn-/- mouse mammary gland gene expression analysis

Project description:Transforming growth factor beta (TGFβ) is a multifunctional cytokine with a well-established role in mammary gland development and both oncogenic and tumor-suppressive functions. The extracellular matrix (ECM) indirectly regulates TGFβ activity by acting as a storage compartment of latent TGFβ, but how TGFβ is released from the ECM via proteolytic mechanisms remains largely unknown. In this study, we demonstrate that hepsin, a type II transmembrane protease overexpressed in 70% of breast tumors, promotes canonical TGFβ signaling through the release of latent TGFβ from the ECM-storage compartment. Mammary glands in hepsin CRISPR knock-out mice showed reduced TGFβ signaling and increased epithelial branching, accompanied by increased levels of fibronectin and latent TGFβ1, while overexpression of hepsin in mammary tumors increased TGFβ signaling. Cell-free and cell-based experiments showed that hepsin is capable of direct proteolytic cleavage of fibronectin but not latent TGFβ and, importantly, that the ability of hepsin to activate TGFβ signaling is dependent on fibronectin. Altogether, this study demonstrates a role for hepsin as a regulator of the TGFβ pathway in the mammary gland via a novel mechanism involving proteolytic downmodulation of fibronectin.

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