Cited by 436Hippo pathway signaling and YAP/TAZDevelopmental Biology and Gene RegulationCellular Mechanics and Interactions

Deregulation of Scribble Promotes Mammary Tumorigenesis and Reveals a Role for Cell Polarity in Carcinoma

Open access
Zhan, Lixing, Rosenberg, Avi, Bergami, Kenneth C., Yu, Min, Xuan, Zhenyu, Jaffe, Aron B., Allred, Craig, Muthuswamy, Senthil K.·2008·Cell

Abstract

Loss of cell polarity proteins such as Scribble induces neoplasia in Drosophila by promoting uncontrolled proliferation. In mammals, the role that polarity proteins play during tumorigenesis is not well understood. Here, we demonstrate that depletion of Scribble in mammary epithelia disrupts cell polarity, blocks three-dimensional morphogenesis, inhibits apoptosis, and induces dysplasia in vivo that progress to tumors after long latency. Loss of Scribble cooperates with oncogenes such as c-myc to transform epithelial cells and induce tumors in vivo by blocking activation of an apoptosis pathway. Like depletion, mislocalization of Scribble from cell-cell junction was sufficient to promote cell transformation. Interestingly, spontaneous mammary tumors in mice and humans possess both downregulated and mislocalized Scribble. Thus, we demonstrate that scribble inhibits breast cancer formation and that deregulation of polarity pathways promotes dysplastic and neoplastic growth in mammals by disrupting morphogenesis and inhibiting cell death.

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Crossref · 10.1016/j.cell.2008.09.045

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  • Mutating Pro305 in the LRR to Leu (Scrib/P305L) abolishes membrane localization.

    “Mutating Pro305 in the LRR12 to Leu (Scrib/P305L) abolishes membrane localization47,56,66,67.”

    From Membrane recruitment of the polarity protein Scribble by the cell adhesion receptor TMIGD1 (2023) · cites this paper as [56]

    The Results section reports that changing Scribble Pro305 to Leu (P305L) moved the protein from cell-cell junctions to the cytoplasm in mammary epithelial cells, supporting the localization claim. It identifies the LRR domain but does not specify that Pro305 lies in LRR12, as the citing sentence states. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Ectopic expression of Scrib/P305L in cell lines suppresses c-myc-induced apoptosis.

    “Importantly, ectopic expression of Scrib/P305L in cell lines disrupts cell polarity, suppresses c-myc-induced apoptosis, enhances Akt signaling, and fails to suppress Ras-MAPK-induced EMT18,47,56,68.”
  • The phenotype of ΔD1-TMIGD1-expressing cells strongly resembles the phenotype observed after depletion of Scrib in mammary gland-derived acinar epithelial cells and in lung organotypic cultures.

    “a phenotype which strongly resembles the phenotype observed after depletion of Scrib in mammary gland-derived acinar epithelial cells56 and in lung organotypic cultures57.”
  • Ectopic expression of Scrib/P305L in cell lines disrupts cell polarity.

    “Importantly, ectopic expression of Scrib/P305L in cell lines disrupts cell polarity, suppresses c-myc-induced apoptosis, enhances Akt signaling, and fails to suppress Ras-MAPK-induced EMT18,47,56,68.”
  • Ectopic expression of Scrib/P305L in cell lines enhances Akt signaling.

    “Importantly, ectopic expression of Scrib/P305L in cell lines disrupts cell polarity, suppresses c-myc-induced apoptosis, enhances Akt signaling, and fails to suppress Ras-MAPK-induced EMT18,47,56,68.”

    From Membrane recruitment of the polarity protein Scribble by the cell adhesion receptor TMIGD1 (2023) · cites this paper as [56]

    The Results section on Scribble mislocalization reports that P305L-expressing cells lose polarity and resist Myc-induced apoptosis, but it does not report enhanced Akt signaling. Searches for Akt, P305L Akt phosphorylation, and Akt activation found no passage linking the mutant to Akt signaling in our copy. (LLM, conf=0.72)

    Experimental — accuracy not yet measured

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1 of the 67 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. Audebert S Navarro C Nourry C Chasserotgolaz S Lecine P Bellaiche Y Dupont J Premont R Sempere C Strub J 2004b Mammalian Scribble Forms a Tight Complex with the βPIX Exchange Factor Current Biol 14 987 995 15182672

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Authors
Zhan, L., Rosenberg, A., Bergami, K. C., Yu, M., Xuan, Z., Jaffe, A. B., Allred, C., & Muthuswamy, S. K.
Affiliations
  • Cold Spring Harbor Laboratory (US)
  • Memorial Sloan Kettering Cancer Center (US)
  • Washington University in St. Louis (US)
Corresponding author
Muthuswamy, Senthil K.
Venue
Cell
Publisher
Elsevier BV
Published
2008-11
Volume
135
Issue
5
Pages
865-878
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2086609648
Cited by
436
References
67
Citations by year
2026: 10 · 2025: 9 · 2024: 11 · 2023: 29 · 2022: 14 · 2021: 14 · 2020: 14 · 2019: 19 · 2018: 22 · 2017: 25 · 2016: 29 · 2015: 25 · 2014: 26 · 2013: 31 · 2012: 43
FWCI
16.64
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (acceptedVersion)
Funders
National Cancer Institute (CA105388, U01CA105388, CA098830, R56CA098830, R01CA098830)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hippo pathway signaling and YAP/TAZ
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular Mechanics and Interactions
Keywords
Scribble, cell polarity, mammary carcinogenesis, breast cancer, apoptosis, c-Myc, cell transformation, dysplasia, cell-cell junction, protein mislocalization, tumor suppressor
MeSH terms
Animals, Breast Neoplasms, Epithelial Cells, Humans, Mammary Glands, Animal, Membrane Proteins, Down-Regulation, Mammary Neoplasms, Animal, Proto-Oncogene Proteins c-myc, Cell Polarity, Apoptosis, Tumor Suppressor Proteins, Cell Line, Tumor, Intracellular Signaling Peptides and Proteins, Mice

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