Cited by 60Developmental Biology and Gene RegulationCancer Cells and MetastasisHippo pathway signaling and YAP/TAZ

Scribble modulates the MAPK/Fra1 pathway to disrupt luminal and ductal integrity and suppress tumour formation in the mammary gland

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Godde, Nathan J., Sheridan, Julie M., Smith, Lorey K., Pearson, Helen B., Britt, Kara L., Galea, Ryan C., Yates, Laura L., Visvader, Jane E. +1 more·2014·PLoS Genetics

Abstract

Polarity coordinates cell movement, differentiation, proliferation and apoptosis to build and maintain complex epithelial tissues such as the mammary gland. Loss of polarity and the deregulation of these processes are critical events in malignant progression but precisely how and at which stage polarity loss impacts on mammary development and tumourigenesis is unclear. Scrib is a core polarity regulator and tumour suppressor gene however to date our understanding of Scrib function in the mammary gland has been limited to cell culture and transplantation studies of cell lines. Utilizing a conditional mouse model of Scrib loss we report for the first time that Scrib is essential for mammary duct morphogenesis, mammary progenitor cell fate and maintenance, and we demonstrate a critical and specific role for Scribble in the control of the early steps of breast cancer progression. In particular, Scrib-deficiency significantly induced Fra1 expression and basal progenitor clonogenicity, which resulted in fully penetrant ductal hyperplasia characterized by high cell turnover, MAPK hyperactivity, frank polarity loss with mixing of apical and basolateral membrane constituents and expansion of atypical luminal cells. We also show for the first time a role for Scribble in mammalian spindle orientation with the onset of mammary hyperplasia being associated with aberrant luminal cell spindle orientation and a failure to apoptose during the final stage of duct tubulogenesis. Restoring MAPK/Fra1 to baseline levels prevented Scrib-hyperplasia, whereas persistent Scrib deficiency induced alveolar hyperplasia and increased the incidence, onset and grade of mammary tumours. These findings, based on a definitive genetic mouse model provide fundamental insights into mammary duct maturation and homeostasis and reveal that Scrib loss activates a MAPK/Fra1 pathway that alters mammary progenitor activity to drive premalignancy and accelerate tumour progression.

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Crossref · 10.1371/journal.pgen.1004323

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  • Conditional mammary gland knockout of Scribble did not disrupt initial gland architecture but at maturity led to ductal hyperplasia, a phenotype mimicked by an LRR point mutant.

    “Similarly, conditional mammary gland knockout did not disrupt initial gland architecture but at maturity led to ductal hyperplasia (Godde et al., 2014), a phenotype mimicked by an LRR point mutant (Feigin et al., 2014).”

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Authors
Godde, N. J., Sheridan, J. M., Smith, L. K., Pearson, H. B., Britt, K. L., Galea, R. C., Yates, L. L., Visvader, J. E., & Humbert, P. O.
Affiliations
The University of Melbourne (AU)
Corresponding author
Humbert, Patrick O.
Venue
PLoS Genetics
Published
2014-05-22
Volume
10
Issue
5
Pages
e1004323
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2001622495
Cited by
60
References
105
Citations by year
2025: 1 · 2024: 3 · 2023: 6 · 2022: 3 · 2021: 4 · 2020: 4 · 2019: 8 · 2018: 7 · 2017: 9 · 2016: 5 · 2015: 7 · 2014: 2
FWCI
3.15
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • ORCA Online Research @Cardiff (Cardiff University) (acceptedVersion)
  • Minerva Access (University of Melbourne) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • Peter MacCallum Cancer Centre
  • Medical Research Council
  • National Health and Medical Research Council (509336)
  • Cancer Council Victoria
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Health Sciences › Medicine › Oncology › Cancer Cells and Metastasis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hippo pathway signaling and YAP/TAZ
Keywords
Scribble, cell polarity, mammary gland development, mammary carcinogenesis, ductal hyperplasia, alveolar hyperplasia, mammary progenitor cells, spindle orientation, tumour suppressor, conditional mouse model
MeSH terms
Fos-Related Antigen 1, Animals, Female, Homeostasis, Hyperplasia, Mammary Glands, Animal, Mammary Neoplasms, Experimental, Morphogenesis, Proto-Oncogene Proteins c-fos, Cell Polarity, MAP Kinase Signaling System, Intracellular Signaling Peptides and Proteins, Mice

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