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Mimicking the Function of Signaling Proteins: Toward Artificial Signal Transduction Therapy
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Requirement for YAP1 signaling in myxoid liposarcoma
Marcel Trautmann1,2, Ya-Yun Cheng3,4, Patrizia Jensen3,4
1Gerhard-Domagk-Institute of Pathology, Münster University Hospital, Münster, Germany.
EMBO Molecular Medicine
|March 23, 2019
Summary
Myxoid liposarcomas (MLS) rely on YAP1, a key protein in cell growth. Inhibiting YAP1 effectively stops MLS tumor growth, offering a new therapeutic target for this cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Myxoid liposarcomas (MLS) are malignant tumors originating from fat cells.
- The FUS-DDIT3 fusion gene drives MLS, but its exact role in cancer development is unclear.
- Targeting MLS cells specifically remains a challenge.
Purpose of the Study:
- To investigate the mechanisms driving sarcomagenesis in MLS.
- To identify potential therapeutic targets for MLS treatment.
- To explore the role of YAP1 in MLS development.
Main Methods:
- Functional genomic screening in FUS-DDIT3-expressing cells.
- Analysis of YAP1 expression, localization, and activity in MLS.
- Pharmacological inhibition of YAP1 in vitro and in vivo models.
Main Results:
- FUS-DDIT3-driven cells and MLS lines are dependent on YAP1.
- Increased YAP1 activity is a characteristic of human MLS.
- FUS-DDIT3 enhances YAP1 expression, nuclear import, and activity, with physical interaction in the nucleus.
- YAP1 inhibition reduces MLS cell proliferation in vitro and tumor growth in vivo.
Conclusions:
- Overactive YAP1 signaling is a central feature of MLS development.
- YAP1 represents a promising novel therapeutic target for myxoid liposarcomas.
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