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

  1. Ying Wang
  2. Thomas S Chaffee
  3. Rebecca S LaRue
  4. Danielle N Huggins
  5. Patrice M Witschen
  6. Ayman M Ibrahim
  7. Andrew C Nelson
  8. Heather L Machado
  9. Kathryn L Schwertfeger  Is a corresponding author
  1. Department of Laboratory Medicine and Pathology, University of Minnesota, United States
  2. University of Minnesota Supercomputing Institute, University of Minnesota, United States
  3. Comparative and Molecular Biosciences Graduate Program, University of Minnesota, United States
  4. Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane School of Medicine, United States
  5. Masonic Cancer Center, University of Minnesota, United States
  6. Center for Immunology, University of Minnesota, United States
6 figures, 1 table and 5 additional files

Figures

Figure 1 with 2 supplements
Identification of Lyve-1+ macrophages in the mammary gland.

(A) Mammary glands from 10-week-old mice (n = 4) were assessed for CD45+ and CD45 Lyve-1+ cells by flow cytometry. (B) Mammary glands from 10-week-old mice (n = 4) were assessed for CD45+CD11b+F4/80…

Figure 1—figure supplement 1
Identification of Lyve-1+ macrophages in the mammary gland.

(A) Gating of flow cytometry for CD45+ and CD45 Lyve-1+ cells. (B) Gating of flow cytometry for CD45+CD11b+F4/80+Lyve-1 and CD45+CD11b+F4/80+Lyve-1+ cells.

Figure 1—figure supplement 2
Localization of Lyve-1+ macrophages in the mammary gland.

Image of a mammary gland from a 6-week-old female mouse (n = 3) stained for F4/80 (red), Lyve-1 (green) and DAPI (blue). Insets show examples of the mammary gland capsule (a–d) and lymph nodes (e–h).

Figure 2 with 1 supplement
Identification of a distinct Lyve-1+ macrophage subpopulation by transcriptional profiling.

(A) Heat map of RNA-seq analysis of CD45+CD11b+F4/80+Lyve-1 and CD45+CD11b+F4/80+Lyve-1+ cells isolated from 6-week-old (lane 1) and 10-week-old (lanes 2–3) mice. Genes shown have an adjusted …

Figure 2—figure supplement 1
Identification of a distinct Lyve-1+ macrophage subpopulation by transcriptional profiling.

(A) Post-sort analysis of CD45+CD11b+F4/80+Lyve-1 and CD45+CD11b+F4/80+Lyve-1+ cells that were submitted for bulk RNA-seq analysis. (B) scRNA-seq data showing genes associated with macrophages …

Figure 3 with 1 supplement
F4/80+Lyve-1+ cells are enriched for CD206 expression.

(A) Violin plot of Mrc1 expression in the single-cell RNA-seq dataset shown in Figure 2. (B) Mammary glands from 10-week-old mice (n = 4) were assessed for CD206 expression in CD45+CD11b+F4/80+Lyve-1…

Figure 3—figure supplement 1
F4/80+Lyve-1+ cells are enriched for CD206 expression.

(A) Gating of flow cytometry for Lyve-1 expression in CD45+CD11b+F4/80+CD206 and CD45+CD11b+F4/80+CD206+ cells. (B) Gating of flow cytometry for CD206 expression in CD45+CD11b+F4/80+Lyve-1 and …

Lyve-1+ macrophages exhibit low turnover and self-renewal in the mammary gland.

(A) Schematic of shielded bone marrow chimera experiment. (B) Representative flow cytometry plots showing the gating and identification of host (CD45.2) and donor (CD45.1) cells in the blood and …

Figure 5 with 1 supplement
Lyve-1+ cells localize to HA-enriched ECM in the mammary gland.

(A) Mammary glands from 6-week-old mice were immunostained for HA using HA binding protein (HABP, green) and smooth muscle actin (SMA, red) (n = 3, three images/sample). (B) Mammary glands from …

Figure 5—figure supplement 1
Lyve-1+ cells localize to HA-enriched ECM in the mammary gland.

Mammary glands were stained for F4/80, Lyve-1 and HABP to confirm that Lyve-1+ cells associated with HA are also F4/80+. Insets show higher magnification.

Figure 6 with 1 supplement
Macrophage depletion impacts ECM in the stroma.

(A) 5-week-old female mice were treated with pexidartinib for 2 weeks and mammary glands were harvested for analysis of macrophages for CD45+CD11b+F4/80+ by flow cytometry. Flow cytometry …

Figure 6—figure supplement 1
Macrophage depletion does not impact ductal elongation of branching.

Quantification of ductal elongation and branching in mammary glands from mice treated with either solvent or pexidartinib for 2 weeks. Ductal Branching DMSO vs pexidartinib, p=0.1081; Ductal Length …

Tables

Key resources table
Reagent type
(species) or resource
DesignationSource or referenceIdentifiersAdditional
information
Strain, strain background (Mus musculus, female)FVB/NEnvigoFVB/NHsd
Strain, strain background (Mus musculus, female)Balb/c CD45.2 MiceJackson LaboratoriesStock No.: 000651Balb/cJ Mouse Strain
Strain, strain background (Mus musculus)Balb/c CD45.1 MiceJackson LaboratoriesStock No.: 006584CByJ.SJL(B6)-Ptprca/J Mouse Strain
AntibodyvioletFluor 450-Conjugated anti-CD45.1 (mouse monoclonal)Tonbo BiosciencesCat #: 75–0453 U025
RRID:AB_2621949
Flow cytometry: 1:200
AntibodyAlexa Fluor 700-Conjugated anti-CD45.2 (mouse monoclonal)BioLegendCat #: 109822
RRID:AB_493731
Flow cytometry: 1:200
AntibodyBUV395-conjugated anti-Ly6G (rat monoclonal)BioLegendCat #: 563978
RRID:AB_2716852
Flow cytometry: 1:400
AntibodyBrilliant Violet 421-Conjugated Anti-CD64 (mouse monoclonal)BioLegendCat #: 139309
RRID:AB_2562694
Flow cytometry: 1:100
AntibodyBrilliant violet 711-conjugated anti-CD11c (Armenian hamster monoclonal)BioLegendCat #: 117349
RRID:AB_2563905
Flow cytometry: 1:200
AntibodyPE/Cy7-conjugated anti-CD11b (rat monoclonal)BioLegendCat #: 101216
RRID:AB_312799
Flow cytometry: 1:200
AntibodyPE-conjugated anti-F4/80 (rat monoclonal)BioLegendCat #: 123109
RRID:AB_893498
Flow cytometry: 1:200
AntibodyBiotinylated anti-Lyve-1 (goat polyclonal)R and D SystemsCat #: BAF2125
RRID:AB_2138529
Flow cytometry:4 μg/mL
AntibodyAnti-CD16/CD32 (rat monoclonal)eBioscienceCat #: 14-0161-82
RRID:AB_467133
Flow cytometry: 1:200
AntibodyRat anti-mouse monoclonal F4/80 (clone: CI: A3-1)Bio-Rad laboratoriesCat# MCA497GA
RRID:AB_323806
IF 1:100
AntibodyGoat polyclonal anti-mouse LYVE-1 (Ala24-Thr234)R and D SystemsCat# AF2125
RRID:AB_2297188
IF 1:60
AntibodyAnti-mannose receptor
(rabbit polyclonal)
AbcamCat# ab64693
RRID:AB_1523910
IF 1:1000
AntibodyAnti-BrdU antibody [BU1/75 (ICR1)]AbcamCat# ab6326
RRID:AB_305426
IF 1:200
AntibodyHyaluronic acid bindingprotein, biotinylatedMillipore SigmaCat# 385911–50 UGIF 1:100
AntibodyActin-smooth muscle (rabbit polyclonal)Spring BioscienceCat# E2464
RRID:AB_95752
IF 1:50
AntibodyCD68 monoclonal antibody (514H12)Thermo- Fisher ScientificCat# MA1-80133
RRID:AB_929283
IF 1:100
AntibodyHuman LYVE-1 antibody (goat polyclonal)R and D SystemsCat# AF2089
RRID:AB_355144
IF 1:60
AntibodyAlexa 594 secondary antibody
(donkey anti-mouse)
Thermo- Fisher ScientificCat# A-32744
RRID:AB_2762826
IF 1:400
AntibodyAlexa 594 secondary antibody (donkey anti-rat)Thermo- Fisher ScientificCat# A-21209
RRID:AB_2535795
IF 1:400
AntibodyAlexa Fluor 488 conjugated streptavidin secondary antibodyThermo- Fisher ScientificCat# S11223IF 1:400
AntibodyAlexa 488 secondary antibody
(donkey anti-goat)
Thermo- Fisher ScientificCat# A-11055
RRID:AB_2534102
IF 1:400
AntibodyAlexa 488 secondary antibody
(goat anti-rabbit)
Thermo- Fisher ScientificCat# A-11008
RRID:AB_143165
IF 1:400
AntibodyAlexa 594 secondary antibody
(goat anti-rat)
Thermo- Fisher ScientificCat # A-11007
RRID:AB_10561522
IF 1:400
AntibodyAlexa 594 secondary antibody (goat anti-rabbit)Thermo- Fisher ScientificCat# A-11012
RRID:AB_2534079
IF 1:400
AntibodyAlexa Fluor 647 conjugated streptavidin secondary antibodyThermo- Fisher ScientificCat# S-32357IF 1:400
Commercial
assay or kit
Hyaluronan enzyme-linked immunosorbent assayEchelon BiosciencesCat #: K-1200
Chemical compound, drugBusulfanSigma-AldrichCat #: B2635-10G
Chemical compound, drugPexidartinibSelleck ChemCat #: S7818
Chemical compound, drugHeparinSigma-AldrichCat #: H3149-10KU
Chemical compound, drugCollagenase ASigma-AldrichCat #: 10103586001
Chemical compound, drugDNase ISigma-AldrichCat #: DN25-100MG
Software, algorithmGraphPad Prism 8.0GraphPad Prism 8.0RRID:SCR_002798http://www.graphpad.com/scientific-software/prism/
Software, algorithmImageJ 2.0.0ImageJ 2.0.0RRID:SCR_003070https://imagej.nih.gov/ij/download.html
Software, algorithmHisat2Kim et al., 2015RRID:SCR_015530version 2.0.2
Software, algorithmDESeq2 softwareLove et al., 2014RRID:SCR_015687version 1.20.0
Software, algorithmggplot2RRRID:SCR_014601v3.0.0
Software, algorithmpheatmapRRRID:SCR_0164181.0.12
OtherFlow Cytometry Perm Buffer (10X)Tonbo BiosciencesCat #: TNB-1213-L150
OtherFixable Viability Dye eFluor 780eBioscienceCat #: 65-0865-14Flow cytometry: 1:1000 dilution
OtherAPC-conjugated streptavidineBioscienceCat #: 17-4317-82Flow cytometry: 1:100 dilution
OtherProLong Gold Antifade Mountant
(DAPI)
Thermo- Fisher ScientificCat# P36931
OtherTrichrome stain kitAbcamCat# ab150686
OtherAntigen Retrieval Buffer (100X EDTA Buffer, pH 8.0)AbcamCat# ab936801x
OtherAntigen unmasking solution, PH 6.0Thermo- Fisher ScientificCat# NC94010671x

Additional files

Supplementary file 1

List of 155 differentially expressed genes in CD45+CD11b+F4/80+Lyve-1 and CD45+CD11b+F4/80+Lyve-1+ bulk RNA-seq analysis.

https://cdn.elifesciences.org/articles/57438/elife-57438-supp1-v2.xlsx
Supplementary file 2

List of the top 100 differentially regulated genes in each cluster from the scRNA-seq analysis.

https://cdn.elifesciences.org/articles/57438/elife-57438-supp2-v2.xlsx
Supplementary file 3

GSEA analysis using gene sets created from a differentially expressed ranked list from the bulk RNA-seq data (adjusted p-value <0.1 and a fold-change >0.25) to determine enrichment of cluster 4.

https://cdn.elifesciences.org/articles/57438/elife-57438-supp3-v2.xlsx
Supplementary file 4

List of top gene sets identified by GSEA analysis including core enriched genes.

https://cdn.elifesciences.org/articles/57438/elife-57438-supp4-v2.xlsx
Transparent reporting form
https://cdn.elifesciences.org/articles/57438/elife-57438-transrepform-v2.docx

Download links