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Ras oncogenes and their downstream targets
Krishnaraj Rajalingam1, Ralf Schreck, Ulf R Rapp
1University of Würzburg, Institut für Medizinische Strahlenkunde und Zellforschung, Versbacherstr. 5, D-97078 Würzburg, Germany.
Abstract:
RAS proteins are small GTPases, which serve as master regulators of a myriad of signaling cascades involved in highly diverse cellular processes. RAS oncogenes have been originally discovered as retroviral oncogenes, and ever since constitutively activating RAS mutations have been identified in human tumors, they are in the focus of intense research. In this review, we summarize the biochemical properties of RAS proteins, trace down the evolution of RAS signaling and present an overview of the spatio-temporal activation of major RAS isoforms. We further discuss RAS effector pathways, their role in normal and transformed cell physiology and summarize ongoing attempts to interfere with aberrant RAS signaling. Finally, we comment on the role of micro RNAs in modulating RAS expression, contribution of RAS to stem cell function and on high-throughput analyses of RAS signaling networks.
Insights
RAS proteins, key regulators of cell signaling, are crucial in cancer. This review covers RAS evolution, activation, effector pathways, and therapeutic strategies targeting RAS mutations.
Area of Science:
- Molecular Biology
- Cellular Signaling
- Oncology
Background:
- RAS proteins are small GTPases regulating diverse cellular processes.
- RAS oncogenes and their mutations are frequently found in human tumors, driving intense research.
- Understanding RAS signaling is critical for cancer biology and therapy.
Purpose of the Study:
- To review the biochemical properties and evolutionary history of RAS signaling.
- To provide an overview of RAS isoform activation and effector pathways.
- To summarize current therapeutic strategies targeting aberrant RAS signaling.
Main Methods:
- Literature review and synthesis of existing research on RAS proteins.
- Analysis of evolutionary pathways of RAS signaling.
- Discussion of molecular mechanisms and therapeutic interventions.
Main Results:
- RAS proteins are central to numerous signaling cascades.
- Aberrant RAS signaling contributes to cancer development and progression.
- Various strategies are being developed to target RAS pathways therapeutically.
Conclusions:
- RAS signaling is a fundamental pathway in cell physiology and disease.
- Targeting RAS offers a promising avenue for cancer treatment.
- Future research includes microRNA modulation, stem cell roles, and network analyses.
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