Collagen signaling and matrix stiffness regulate multipotency in glandular epithelial stem cells in mice

Chen Jiang, Alessia Centonze, Yura Song, Antonius Chrisnandy, Elisavet Tika, Saba Rezakhani, Zahra Zahedi, Gaëlle Bouvencourt, Christine Dubois, Alexandra Van Keymeulen, Matthias Lütolf, Alejandro Sifrim and Cédric Blanpain ()
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Chen Jiang: Université Libre de Bruxelles (ULB)
Alessia Centonze: Université Libre de Bruxelles (ULB)
Yura Song: Université Libre de Bruxelles (ULB)
Antonius Chrisnandy: Ecole Polytechnique Fédérale de Lausanne (EPFL)
Elisavet Tika: Université Libre de Bruxelles (ULB)
Saba Rezakhani: Ecole Polytechnique Fédérale de Lausanne (EPFL)
Zahra Zahedi: Université Libre de Bruxelles (ULB)
Gaëlle Bouvencourt: Université Libre de Bruxelles (ULB)
Christine Dubois: Université Libre de Bruxelles (ULB)
Alexandra Van Keymeulen: Université Libre de Bruxelles (ULB)
Matthias Lütolf: Ecole Polytechnique Fédérale de Lausanne (EPFL)
Alejandro Sifrim: University of Leuven, KU Leuven
Cédric Blanpain: Université Libre de Bruxelles (ULB)

Nature Communications, 2024, vol. 15, issue 1, 1-19

Abstract: Abstract Glandular epithelia, including mammary gland (MG) and prostate, are composed of luminal and basal cells. During embryonic development, glandular epithelia arise from multipotent stem cells (SCs) that are replaced after birth by unipotent basal and unipotent luminal SCs. Different conditions, such as basal cell transplantation, luminal cell ablation, and oncogene expression can reinduce adult basal SC (BaSCs) multipotency in different glandular epithelia. The mechanisms regulating the reactivation of multipotency are incompletely understood. Here, we have found that Collagen I expression is commonly upregulated in BaSCs across the different multipotent conditions. Increasing collagen concentration or stiffness of the extracellular matrix (ECM) promotes BaSC multipotency in MG and prostate organoids. Single cell RNA-seq of MG organoids in stiff conditions have uncovered the importance of β1 integrin/FAK/AP-1 axis in the regulation of BaSC multipotency. Altogether our study uncovers the key role of Collagen signaling and ECM stiffness in the regulation of multipotency in glandular epithelia.

Date: 2024
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DOI: 10.1038/s41467-024-54843-5

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