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Carabaña C, Sun W, Veludo Ramos C, Huyghe M, Perkins M, Maillot A, Journot R, Hartani F, Faraldo MM, Lloyd-Lewis B, Fre S. Spatially distinct epithelial and mesenchymal cell subsets along progressive lineage restriction in the branching embryonic mammary gland. EMBO J 2024; 43:2308-2336. [PMID: 38760574 PMCID: PMC11183262 DOI: 10.1038/s44318-024-00115-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 04/06/2024] [Accepted: 04/17/2024] [Indexed: 05/19/2024] Open
Abstract
How cells coordinate morphogenetic cues and fate specification during development remains a fundamental question in organogenesis. The mammary gland arises from multipotent stem cells (MaSCs), which are progressively replaced by unipotent progenitors by birth. However, the lack of specific markers for early fate specification has prevented the delineation of the features and spatial localization of MaSC-derived lineage-committed progenitors. Here, using single-cell RNA sequencing from E13.5 to birth, we produced an atlas of matched mouse mammary epithelium and mesenchyme and reconstructed the differentiation trajectories of MaSCs toward basal and luminal fate. We show that murine MaSCs exhibit lineage commitment just prior to the first sprouting events of mammary branching morphogenesis at E15.5. We identify early molecular markers for committed and multipotent MaSCs and define their spatial distribution within the developing tissue. Furthermore, we show that the mammary embryonic mesenchyme is composed of two spatially restricted cell populations, and that dermal mesenchyme-produced FGF10 is essential for embryonic mammary branching morphogenesis. Altogether, our data elucidate the spatiotemporal signals underlying lineage specification of multipotent MaSCs, and uncover the signals from mesenchymal cells that guide mammary branching morphogenesis.
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Affiliation(s)
- Claudia Carabaña
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, 75248, Paris, France
- Sorbonne Université, Collège Doctoral, Paris, France
- Department of Health Sciences, Faculty of Biomedical and Health Sciences, Universidad Europea de Madrid, C/Tajo, s/n, Villaviciosa de Odón, 28670, Madrid, Spain
| | - Wenjie Sun
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, 75248, Paris, France
| | - Camila Veludo Ramos
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, 75248, Paris, France
| | - Mathilde Huyghe
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, 75248, Paris, France
| | - Meghan Perkins
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, 75248, Paris, France
| | - Aurélien Maillot
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, 75248, Paris, France
| | - Robin Journot
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, 75248, Paris, France
| | - Fatima Hartani
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, 75248, Paris, France
| | - Marisa M Faraldo
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, 75248, Paris, France
| | - Bethan Lloyd-Lewis
- School of Cellular and Molecular Medicine, University of Bristol, Biomedical Sciences Building, Bristol, BS8 1TD, UK.
| | - Silvia Fre
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, 75248, Paris, France.
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Spina E, Simundza J, Incassati A, Chandramouli A, Kugler MC, Lin Z, Khodadadi-Jamayran A, Watson CJ, Cowin P. Gpr125 is a unifying hallmark of multiple mammary progenitors coupled to tumor latency. Nat Commun 2022; 13:1421. [PMID: 35302059 PMCID: PMC8931046 DOI: 10.1038/s41467-022-28937-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 02/16/2022] [Indexed: 12/15/2022] Open
Abstract
Gpr125 is an orphan G-protein coupled receptor, with homology to cell adhesion and axonal guidance factors, that is implicated in planar polarity and control of cell movements. By lineage tracing we demonstrate that Gpr125 is a highly specific marker of bipotent mammary stem cells in the embryo and of multiple long-lived unipotent basal mammary progenitors in perinatal and postnatal glands. Nipple-proximal Gpr125+ cells express a transcriptomic profile indicative of chemo-repulsion and cell movement, whereas Gpr125+ cells concentrated at invasive ductal tips display a hybrid epithelial-mesenchymal phenotype and are equipped to bind chemokine and growth factors and secrete a promigratory matrix. Gpr125 progenitors acquire bipotency in the context of transplantation and cancer and are greatly expanded and massed at the pushing margins of short latency MMTV-Wnt1 tumors. High Gpr125 expression identifies patients with particularly poor outcome within the basal breast cancer subtype highlighting its potential utility as a factor to stratify risk. Gpr125 has emerged as a specific marker of mammary stem cells and basal progenitors. Here they show that Gpr125 cells congregate at ductal tips during morphogenesis and amass at tumor margins, and that high Gpr125 predicts early tumor onset and poor outcome in basal breast cancer.
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Affiliation(s)
- Elena Spina
- Department of Cell Biology, New York University School of Medicine, New York, USA.
| | - Julia Simundza
- Department of Cell Biology, New York University School of Medicine, New York, USA
| | - Angela Incassati
- Department of Cell Biology, New York University School of Medicine, New York, USA
| | - Anupama Chandramouli
- Department of Cell Biology, New York University School of Medicine, New York, USA.,Department of Dermatology, New York University School of Medicine, New York, USA
| | - Matthias C Kugler
- Division of Pulmonary and Critical Care Medicine, New York University School of Medicine, New York, USA
| | - Ziyan Lin
- Department of Applied Bioinformatics, New York University School of Medicine, New York, USA
| | | | | | - Pamela Cowin
- Department of Cell Biology, New York University School of Medicine, New York, USA. .,Department of Dermatology, New York University School of Medicine, New York, USA.
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