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Tissue-resident macrophages promote extracellular matrix homeostasis in the mammary gland stroma of nulliparous mice.

Ying Wang | Thomas S Chaffee | Rebecca S LaRue | Danielle N Huggins | Patrice M Witschen | Ayman M Ibrahim | Andrew C Nelson | Heather L Machado | Kathryn L Schwertfeger
eLife | 2020

Tissue-resident macrophages in the mammary gland are found in close association with epithelial structures and within the adipose stroma, and are important for mammary gland development and tissue homeostasis. Macrophages have been linked to ductal development in the virgin mammary gland, but less is known regarding the effects of macrophages on the adipose stroma. Using transcriptional profiling and single-cell RNA sequencing approaches, we identify a distinct resident stromal macrophage subpopulation within the mouse nulliparous mammary gland that is characterized by the expression of Lyve-1, a receptor for the extracellular matrix (ECM) component hyaluronan. This subpopulation is enriched in genes associated with ECM remodeling and is specifically associated with hyaluronan-rich regions within the adipose stroma and fibrous capsule of the virgin mammary gland. Furthermore, macrophage depletion leads to enhanced accumulation of hyaluronan-associated ECM in the adipose-associated stroma, indicating that resident macrophages are important for maintaining homeostasis within the nulliparous mammary gland stroma.

Pubmed ID: 32479261

Antibodies used in this publication

Associated grants

  • Agency: NCI NIH HHS, United States
    Id: P30 CA077598
  • Agency: NIH HHS, United States
    Id: T32 OD010993
  • Agency: NICHD NIH HHS, United States
    Id: R01 HD095858
  • Agency: American Cancer Society, International
    Id: 132570-PF-18-140-01-CSM
  • Agency: NCI NIH HHS, United States
    Id: R01 CA212518
  • Agency: NCI NIH HHS, United States
    Id: R21 CA235385
  • Agency: NCI NIH HHS, United States
    Id: R01 CA215052
  • Agency: American Cancer Society, International
    Id: 132574-CSDG-18-139-01-CSM

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