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Updated: Sep 28, 2026

Magnetic Resonance Imaging Assessment of Carcinogen-induced Murine Bladder Tumors
Published on: March 29, 2019
Ras signal transduction in carcinogenesis and progression of bladder cancer: molecular target for treatment?
Nobuo Shinohara1, Tomohiko Koyanagi
1nobuo-s@med.hokudai.ac.jp
Abstract:
Ras oncogenes are considered to play a key role in the carcinogenesis and progression of human bladder cancer. The oncogenes code for the Ras p21 proteins, which localize in the internal part of the cell membrane and act as molecular switches to mediate downstream signaling from a variety of extracellular stimuli. Activation of Ras proteins induces the constitutive activation of downstream kinase cascades, which results in continuous mitogenic signaling and transformation of immortalized cells in human bladder cancer. Therefore inactivation of the activated Ras function might be effective for the development of a novel treatment strategy against human bladder cancer. Recently several ways to suppress Ras activities, including inhibitors of Ras signal transduction and a ras suppressor mutant, have been reported. Here we review the current concepts of the basic mechanisms of the intracellular Ras signaling pathway and ras activation in the carcinogenesis and progression of human bladder cancer and discuss clinical potentials of their therapeutic interventions.
Insights
Ras oncogenes drive human bladder cancer development and progression. Targeting Ras proteins offers a promising new therapeutic strategy for bladder cancer treatment.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Genetics
Background:
- Ras oncogenes are crucial in human bladder cancer's initiation and advancement.
- Ras proteins function as intracellular molecular switches, regulating cell signaling pathways.
- Aberrant Ras activation leads to uncontrolled cell growth and cancer progression.
Purpose of the Study:
- To review the fundamental mechanisms of intracellular Ras signaling.
- To examine the role of Ras activation in human bladder cancer.
- To discuss the therapeutic potential of targeting Ras signaling in bladder cancer treatment.
Main Methods:
- Review of current scientific literature on Ras signaling pathways.
- Analysis of Ras oncogene involvement in bladder cancer carcinogenesis and progression.
- Discussion of emerging therapeutic strategies targeting Ras.
Main Results:
- Ras proteins are key mediators of mitogenic signaling in bladder cancer.
- Constitutive Ras activation contributes to cellular transformation and tumor growth.
- Several approaches to inhibit Ras activity are under investigation.
Conclusions:
- Understanding Ras signaling is vital for developing effective bladder cancer therapies.
- Inhibiting activated Ras function presents a viable therapeutic avenue.
- Targeting Ras pathways holds significant clinical potential for bladder cancer treatment.
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