PMID- 30016639 OWN - NLM STAT- MEDLINE DCOM- 20181001 LR - 20191001 IS - 1095-564X (Electronic) IS - 0012-1606 (Print) IS - 0012-1606 (Linking) VI - 442 IP - 1 DP - 2018 Oct 1 TI - The phenotypic and functional properties of mouse yolk-sac-derived embryonic macrophages. PG - 138-154 LID - S0012-1606(18)30461-5 [pii] LID - 10.1016/j.ydbio.2018.07.009 [doi] AB - Macrophages are well characterized as immune cells. However, in recent years, a multitude of non-immune functions have emerged many of which play essential roles in a variety of developmental processes (Wynn et al., 2013; DeFalco et al., 2014). In adult animals, macrophages are derived from circulating monocytes originating in the bone marrow, but much of the tissue-resident population arise from erythro-myeloid progenitors (EMPs) in the extra-embryonic yolk sac, appearing around the same time as primitive erythroblasts (Schulz et al., 2012; Kierdorf et al., 2013; McGrath et al., 2015; Gomez Perdiguero et al., 2015; Mass et al., 2016). Of particular interest to our group, macrophages have been shown to act as pro-angiogenic regulators during development (Wynn et al., 2013; DeFalco et al., 2014; Hsu et al., 2015), but there is still much to learn about these early cells. The goal of the present study was to isolate and expand progenitors of yolk-sac-derived Embryonic Macrophages (EMs) in vitro to generate a new platform for mechanistic studies of EM differentiation. To accomplish this goal, we isolated pure (>98%) EGFP(+) populations by flow cytometry from embryonic day 9.5 (E9.5) Csf1r-EGFP(+/tg) mice, then evaluated the angiogenic potential of EMs relative to Bone Marrow-Derived Macrophages (BMDMs). We found that EMs expressed more pro-angiogenic and less pro-inflammatory macrophage markers than BMDMs. EMs also promoted more endothelial cell (EC) cord formation in vitro, as compared to BMDMs in a manner that required direct cell-to-cell contact. Importantly, EMs preferentially matured into microglia when co-cultured with mouse Neural Stem/Progenitor Cells (NSPCs). In conclusion, we have established a protocol to isolate and propagate EMs in vitro, have further defined specialized properties of yolk-sac-derived macrophages, and have identified EM-EC and EM-NSPC interactions as key inducers of EC tube formation and microglial cell maturation, respectively. CI - Copyright (c) 2018 The Authors. Published by Elsevier Inc. All rights reserved. FAU - Yosef, Nejla AU - Yosef N AD - Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA. FAU - Vadakkan, Tegy J AU - Vadakkan TJ AD - Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA. FAU - Park, June-Hee AU - Park JH AD - Department of Neurology, Yale University, New Haven, CT, USA. FAU - Poche, Ross A AU - Poche RA AD - Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA. FAU - Thomas, Jean-Leon AU - Thomas JL AD - Department of Neurology, Yale University, New Haven, CT, USA; Sorbonne Universites UPMC Univ Paris 06, Inserm, CNRS, APHP, Institut du Cerveau et de la Moelle epiniere (ICM), GH Pitie-Salpetriere, Paris, France. FAU - Dickinson, Mary E AU - Dickinson ME AD - Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA; Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA; Department of Bioengineering, Rice University, Houston, TX, USA. Electronic address: mdickins@bcm.edu. LA - eng GR - R01 EB016629/EB/NIBIB NIH HHS/United States GR - R01 HL128064/HL/NHLBI NIH HHS/United States GR - P30 CA125123/CA/NCI NIH HHS/United States GR - P30 AI036211/AI/NIAID NIH HHS/United States GR - S10 RR024574/RR/NCRR NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20180730 PL - United States TA - Dev Biol JT - Developmental biology JID - 0372762 SB - IM MH - Animals MH - Cell Culture Techniques/methods MH - Cell Differentiation/physiology MH - Coculture Techniques/methods MH - Erythroid Precursor Cells/*physiology MH - Flow Cytometry/methods MH - Hematopoietic Stem Cells/physiology MH - Macrophages/cytology/*physiology MH - Mice/embryology MH - Myeloid Progenitor Cells/*physiology MH - Phenotype MH - Yolk Sac/cytology PMC - PMC6190604 MID - NIHMS1503299 OTO - NOTNLM OT - Angiogenesis OT - Endothelial Cells OT - Macrophages OT - Microglia OT - Neural Stem/Progenitor Cells OT - Yolk sac EDAT- 2018/07/18 06:00 MHDA- 2018/10/03 06:00 PMCR- 2019/10/01 CRDT- 2018/07/18 06:00 PHST- 2018/07/04 00:00 [received] PHST- 2018/07/11 00:00 [accepted] PHST- 2018/07/18 06:00 [pubmed] PHST- 2018/10/03 06:00 [medline] PHST- 2018/07/18 06:00 [entrez] PHST- 2019/10/01 00:00 [pmc-release] AID - S0012-1606(18)30461-5 [pii] AID - 10.1016/j.ydbio.2018.07.009 [doi] PST - ppublish SO - Dev Biol. 2018 Oct 1;442(1):138-154. doi: 10.1016/j.ydbio.2018.07.009. Epub 2018 Jul 30.