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TEL/ARG induces cytoskeletal abnormalities in 293T cells
Chiara Palmi1, Grazia Fazio, Arianna Cassetti
1Centro Ricerca Tettamanti, Università di Milano-Bicocca, Ospedale San Gerardo, Monza, Italy.
Cancer Letters
|November 29, 2005
Summary
Researchers identified a novel alternatively spliced TEL/ARG fusion transcript. This aberrant kinase targets Rho inhibitor p190RhoGAP, affecting cell adhesion and morphology in 293T cells.
Area of Science:
- Molecular Biology
- Cell Biology
- Oncology
Background:
- A novel fusion transcript, TEL/ARG, comprising TEL oligomerization and ARG kinase domains, was previously identified in acute myeloid leukemia.
- The functional and cellular consequences of TEL/ARG expression remain largely uncharacterized.
Purpose of the Study:
- To investigate an alternatively spliced TEL/ARG transcript.
- To elucidate the cellular phenotype associated with TEL/ARG expression.
- To identify downstream targets of the aberrant TEL/ARG kinase.
Main Methods:
- Identification and characterization of an alternatively spliced TEL/ARG transcript.
- Expression of TEL/ARG in 293T cells.
- Cellular localization studies using co-localization with beta-actin.
- Morphological analysis of TEL/ARG expressing cells.
- Identification of kinase targets using biochemical assays.
Main Results:
- An alternatively spliced TEL/ARG transcript lacking a portion of the ARG F-actin binding domain was identified.
- TEL/ARG expression in 293T cells led to co-localization with cellular beta-actin.
- Cells expressing TEL/ARG exhibited morphologic changes, including rounding and detachment.
- p190RhoGAP, a regulator of cellular adhesion, was identified as a target of the aberrant TEL/ARG kinase.
Conclusions:
- The alternatively spliced TEL/ARG transcript influences cell morphology and adhesion.
- TEL/ARG aberrant kinase activity impacts the Rho signaling pathway by targeting p190RhoGAP.
- These findings provide insights into the molecular mechanisms underlying TEL/ARG-associated oncogenesis.