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Updated: Apr 19, 2026

Testing Targeted Therapies in Cancer using Structural DNA Alteration Analysis and Patient-Derived Xenografts
Published on: July 25, 2020
Current treatment strategies for inhibiting mTOR in cancer
Francesca Chiarini1, Camilla Evangelisti1, James A McCubrey2
1Institute of Molecular Genetics, National Research Council, Bologna, Italy; Rizzoli Orthopedic Institute, Bologna, Italy.
Abstract:
Mammalian target of rapamycin (mTOR) is a Ser/Thr kinase that regulates a wide range of functions, including cell growth, proliferation, survival, autophagy, metabolism, and cytoskeletal organization. mTOR activity is dysregulated in several human disorders, including cancer. The crucial role of mTOR in cancer cell biology has stimulated interest in mTOR inhibitors, placing mTOR on the radar of the pharmaceutical industry. Several mTOR inhibitors have already undergone clinical trials for treating tumors, without great success, although mTOR inhibitors are approved for the treatment of some types of cancer, including advanced renal cell carcinoma. However, the role of mTOR inhibitors in cancer treatment continues to evolve as new compounds are continuously being disclosed. Here we review the three classes of mTOR inhibitors currently available for treating cancer patients. Moreover, we highlight efforts to identify markers of resistance and sensitivity to mTOR inhibition that could prove useful in the emerging field of personalized medicine.
Insights
Mammalian target of rapamycin (mTOR) inhibitors are explored for cancer treatment. Research reviews current inhibitors and identifies markers for personalized medicine approaches to improve treatment efficacy.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Mammalian target of rapamycin (mTOR) is a key kinase regulating cell growth, proliferation, survival, autophagy, metabolism, and cytoskeletal organization.
- Dysregulated mTOR activity is implicated in various human diseases, notably cancer, driving pharmaceutical interest in mTOR inhibitors.
- While some mTOR inhibitors are approved for specific cancers like advanced renal cell carcinoma, clinical trial success has been limited, necessitating ongoing research.
Purpose of the Study:
- To review the three main classes of mTOR inhibitors currently used in cancer therapy.
- To highlight research efforts in identifying biomarkers for resistance and sensitivity to mTOR inhibition.
- To discuss the potential of these biomarkers in advancing personalized medicine for cancer treatment.
Main Methods:
- Literature review of existing mTOR inhibitors in cancer treatment.
- Analysis of current research on resistance and sensitivity markers for mTOR inhibition.
- Synthesis of information on the evolving role of mTOR inhibitors in oncology.
Main Results:
- Identification and categorization of three classes of mTOR inhibitors for cancer treatment.
- Discussion of the varying clinical success and limitations of current mTOR inhibitors.
- Highlighting the importance of biomarkers for predicting patient response to mTOR-targeted therapies.
Conclusions:
- The landscape of mTOR inhibitors in cancer treatment is dynamic, with ongoing development of new compounds.
- Identifying predictive biomarkers for mTOR inhibition is crucial for developing personalized medicine strategies.
- Further research into resistance and sensitivity markers will refine the clinical application of mTOR inhibitors in oncology.
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