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Updated: Jun 26, 2026
09:17
Characterization of the Effects of Migrastatic Inhibitors on 3D Tumor Spheroid Invasion by High-resolution Confocal Microscopy
Published on: September 16, 2019
GRIM-19 inhibits v-Src-induced cell motility by interfering with cytoskeletal restructuring
P Sun1, S C Nallar, S Kalakonda
1Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
Oncogene
|January 20, 2009
Summary
Gene associated with Retinoid-Interferon-induced Mortality 19 (GRIM-19) suppresses tumors by inhibiting cell motility and metastasis. Mutations in GRIM-19 impair its tumor-suppressing function, highlighting its pathological significance.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Gene associated with Retinoid-Interferon-induced Mortality 19 (GRIM-19) is a tumor suppressor.
- GRIM-19 inhibits v-Src-induced oncogenic transformation and cell metastasis.
- Oncogenic v-Src promotes cell motility via cytoskeletal remodeling and podosome formation.
Purpose of the Study:
- To investigate how GRIM-19 inhibits v-Src-induced cell motility.
- To identify the functional domains and residues of GRIM-19 involved in this process.
- To assess the impact of tumor-associated GRIM-19 mutations on its anti-metastatic function.
Main Methods:
- Cell culture and manipulation of GRIM-19 expression.
- Analysis of cytoskeletal remodeling and podosome formation.
- Site-directed mutagenesis to identify critical residues in GRIM-19.
- In vivo metastasis assays.
Main Results:
- GRIM-19 inhibits v-Src-induced cell motility by suppressing cytoskeletal remodeling and podosome formation.
- The N-terminal region of GRIM-19 is crucial for inhibiting cell motility, with specific residues identified.
- Tumor-associated GRIM-19 mutations abolish its ability to inhibit v-Src-induced cell motility and in vivo metastasis.
- GRIM-19's inhibitory effects on cell motility are independent of STAT3.
Conclusions:
- GRIM-19 functions as a tumor suppressor by inhibiting v-Src-induced cell motility and metastasis.
- The N terminus of GRIM-19 is critical for its anti-metastatic activity.
- Disruption of GRIM-19 function by mutations has significant pathological implications in cancer progression.
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