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Functional proteomics analysis to study ATM dependent signaling in response to ionizing radiation
Amrita K Cheema1,2, Rency S Varghese1, Olga Timofeeva1
1Department of Oncology, Georgetown University Medical Center, Washington, DC.
Radiation Research
|May 7, 2013
Summary
Ataxia telangiectasia (AT) is a genetic disorder. This study reveals how ATM gene perturbations trigger stress responses, impacting cellular pathways like axonal guidance, crucial for understanding AT disease mechanisms.
Area of Science:
- Genetics
- Molecular Biology
- Cellular Biology
Background:
- Ataxia telangiectasia (AT) is a severe human genetic disorder.
- AT is characterized by radiation sensitivity, impaired neuronal development, and cancer predisposition.
- Previous research identified metabolic pathway alterations in AT models.
Purpose of the Study:
- To investigate ionizing radiation-induced stress response signaling in ATM gene perturbations.
- To elucidate the role of the ATM gene in cellular stress response pathways.
Main Methods:
- Utilized a genetically defined model cell system with kinase-dead or kinase-proficient ATM.
- Employed a functional proteomics approach to analyze protein expression and modifications.
- Conducted functional pathway analysis on the proteomic data.
Main Results:
- Identified robust translational and post-translational responses under ATM-proficient conditions.
- Observed enrichment of proteins in Ephrin receptor and axonal guidance signaling pathways.
- Demonstrated ATM gene perturbations trigger specific stress response signaling cascades.
Conclusions:
- ATM gene perturbations significantly influence cellular stress responses.
- Ephrin receptor and axonal guidance pathways are implicated in ATM-mediated cellular stress.
- These findings provide a basis for further research into AT cellular mechanisms and potential therapeutic targets.
