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Morgner J, Bornes L, Hahn K, López-Iglesias C, Kroese L, Pritchard CEJ, Vennin C, Peters PJ, Huijbers I, van Rheenen J. A Lamb1Dendra2 mouse model identifies basement-membrane-producing origins and dynamics in PyMT breast tumors. Dev Cell 2023; 58:535-549.e5. [PMID: 36905927 DOI: 10.1016/j.devcel.2023.02.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/20/2022] [Accepted: 02/20/2023] [Indexed: 03/12/2023]
Abstract
The basement membrane (BM) around tumor lobes forms a barrier to prevent cancer cells from invading the surrounding tissue. Although myoepithelial cells are key producers of the healthy mammary epithelium BM, they are nearly absent in mammary tumors. To study the origin and dynamics of the BM, we developed and imaged a laminin beta1-Dendra2 mouse model. We show that the turnover of laminin beta1 is faster in the BMs that surround the tumor lobes than in the BMs that surround the healthy epithelium. Moreover, we find that epithelial cancer cells and tumor-infiltrating endothelial cells synthesize laminin beta1 and that this production is temporarily and locally heterogeneous, leading to local discontinuity of the BM laminin beta1. Collectively, our data draw a new paradigm for tumor BM turnover in which the disassembly happens at a constant rate, and a local misbalance of compensating production leads to reduction or even complete disappearance of the BM.
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Affiliation(s)
- Jessica Morgner
- Department of Molecular Pathology, Oncode Institute, Netherlands Cancer Institute, Amsterdam, 1066 CX, the Netherlands.
| | - Laura Bornes
- Department of Molecular Pathology, Oncode Institute, Netherlands Cancer Institute, Amsterdam, 1066 CX, the Netherlands
| | - Kerstin Hahn
- Department of Molecular Pathology, Oncode Institute, Netherlands Cancer Institute, Amsterdam, 1066 CX, the Netherlands
| | - Carmen López-Iglesias
- The Maastricht Multimodal Molecular Imaging Institute, Maastricht University, Maastricht, 6229 ER, the Netherlands
| | - Lona Kroese
- Mouse Clinic for Cancer and Aging, the Netherlands Cancer Institute, Amsterdam, 1066 CX, the Netherlands
| | - Colin E J Pritchard
- Mouse Clinic for Cancer and Aging, the Netherlands Cancer Institute, Amsterdam, 1066 CX, the Netherlands
| | - Claire Vennin
- Department of Molecular Pathology, Oncode Institute, Netherlands Cancer Institute, Amsterdam, 1066 CX, the Netherlands
| | - Peter J Peters
- The Maastricht Multimodal Molecular Imaging Institute, Maastricht University, Maastricht, 6229 ER, the Netherlands
| | - Ivo Huijbers
- Mouse Clinic for Cancer and Aging, the Netherlands Cancer Institute, Amsterdam, 1066 CX, the Netherlands
| | - Jacco van Rheenen
- Department of Molecular Pathology, Oncode Institute, Netherlands Cancer Institute, Amsterdam, 1066 CX, the Netherlands.
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