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Updated: Apr 15, 2026

Monitoring Hippo Signaling Pathway Activity Using a Luciferase-based Large Tumor Suppressor LATS Biosensor
Published on: September 13, 2018
Spectrin regulates Hippo signaling by modulating cortical actomyosin activity
Hua Deng1, Wei Wang1, Jianzhong Yu1
1Department of Molecular Biology and Genetics, Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, United States.
Spectrin, a contractile protein, is identified as a new upstream regulator of the Hippo pathway. It modulates cytoskeletal tension and actomyosin activity, offering novel insights into how mechanical forces control tissue growth.
Area of Science:
- Cell Biology
- Developmental Biology
- Biophysics
Background:
- The Hippo pathway is crucial for regulating tissue growth by controlling gene transcription.
- Cytoskeletal tension, particularly via the Rok-myosin II pathway, is implicated in Hippo signaling, but its precise regulation and upstream factors are unclear.
Purpose of the Study:
- To identify novel upstream regulators of the Hippo signaling pathway.
- To elucidate the role of cytoskeletal tension in Hippo pathway regulation.
Main Methods:
- Investigated the function of spectrin, a cytoskeleton-associated protein.
- Analyzed spectrin's impact on cortical actomyosin activity and non-muscle myosin II.
- Compared spectrin's regulatory mechanism to known Hippo pathway components like Crumbs, Kibra, Expanded, and Merlin.
Main Results:
- Spectrin acts as an upstream regulator of the Hippo signaling pathway.
- Spectrin modulates Hippo signaling distinctly from canonical regulators by affecting cortical actomyosin activity via non-muscle myosin II.
- This mechanism highlights a novel link between cytoskeletal tension and Hippo pathway activation.
Conclusions:
- Spectrin is a key mediator connecting cytoskeletal tension to Hippo pathway regulation.
- This discovery provides a new avenue for understanding how mechanical signals influence tissue growth and development.
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