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Published on: October 23, 2018
Recent developments in targeting the mammalian target of rapamycin (mTOR) kinase pathway
1Department of Hematology, Medical University of Lodz, Lodz, Poland. piotr_smolewski@wp.pl
Abstract:
The mammalian target of rapamycin (mTOR) is a threonine kinase involved in intracellular pro-survival signaling. Its activation leads to progression from the G1 to S phase of the cell cycle. Constitutive activation of the mTOR-related messengers, including phosphatidylinositol 3-kinase, Akt kinase, ribosomal p70S6 kinase and eukaryotic translation initiation factor 4E-binding protein kinase, was found in numerous malignancies. Recent data indicate that the mTOR kinase pathway can be an attractive target for anti-cancer drug development. A well-known mTOR inhibitor is rapamycin (RAPA), previously applied as an immunosuppressive agent in transplant studies. Recently, analogs of RAPA, such as CCI-779, RAD001 and AP23573, have been developed. All of those agents are currently being tested in patients with solid or hematological tumors in several clinical trials. This review presents recent developments in targeting the mTOR kinase pathway.
Insights
The mammalian target of rapamycin (mTOR) pathway is crucial for cell survival and cancer progression. Targeting this pathway with inhibitors like rapamycin analogs shows promise for anti-cancer drug development.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- The mammalian target of rapamycin (mTOR) is a key threonine kinase regulating intracellular pro-survival signaling.
- mTOR pathway activation promotes cell cycle progression from G1 to S phase.
- Constitutive activation of mTOR-related signaling molecules is implicated in various malignancies.
Purpose of the Study:
- To review recent advancements in targeting the mTOR kinase pathway for anti-cancer drug development.
Main Methods:
- Review of recent scientific literature and clinical trial data.
- Analysis of mTOR pathway components and their role in cancer.
- Evaluation of mTOR inhibitors, including rapamycin and its analogs.
Main Results:
- The mTOR pathway is frequently activated in numerous cancers.
- Rapamycin (RAPA) and its analogs (CCI-779, RAD001, AP23573) are effective mTOR inhibitors.
- These agents are under investigation in clinical trials for solid and hematological tumors.
Conclusions:
- The mTOR kinase pathway represents a promising therapeutic target for cancer treatment.
- Ongoing clinical trials are evaluating the efficacy of novel mTOR inhibitors.
- Targeting mTOR offers a potential strategy for developing new anti-cancer drugs.
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