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Published on: February 3, 2017
mTOR Pathways in Cancer and Autophagy
Mathieu Paquette1,2, Leeanna El-Houjeiri3,4, Arnim Pause5,6
1Goodman Cancer Research Center, McGill University, Montréal, QC H3A 1A3, Canada. mathieu.paquette2@mail.mcgill.ca.
Abstract:
TOR (target of rapamycin), an evolutionarily-conserved serine/threonine kinase, acts as a central regulator of cell growth, proliferation and survival in response to nutritional status, growth factor, and stress signals. It plays a crucial role in coordinating the balance between cell growth and cell death, depending on cellular conditions and needs. As such, TOR has been identified as a key modulator of autophagy for more than a decade, and several deregulations of this pathway have been implicated in a variety of pathological disorders, including cancer. At the molecular level, autophagy regulates several survival or death signaling pathways that may decide the fate of cancer cells; however, the relationship between autophagy pathways and cancer are still nascent. In this review, we discuss the recent cellular signaling pathways regulated by TOR, their interconnections to autophagy, and the clinical implications of TOR inhibitors in cancer.
Insights
Target of rapamycin (TOR) kinase regulates cell growth and autophagy, impacting cancer cell fate. This review explores TOR signaling, autophagy connections, and TOR inhibitors for cancer therapy.
Area of Science:
- Molecular Biology
- Cell Biology
- Oncology
Background:
- The target of rapamycin (TOR) kinase is a central regulator of cell growth, proliferation, and survival.
- TOR signaling is intricately linked to cellular responses to nutrients, growth factors, and stress.
- Dysregulation of TOR and autophagy pathways is implicated in various diseases, notably cancer.
Purpose of the Study:
- To review recent cellular signaling pathways regulated by TOR.
- To elucidate the interconnections between TOR signaling and autophagy.
- To discuss the clinical implications of targeting TOR in cancer treatment.
Main Methods:
- Literature review of recent studies on TOR signaling.
- Analysis of molecular mechanisms linking TOR and autophagy.
- Examination of clinical data on TOR inhibitors in cancer.
Main Results:
- TOR regulates key cellular processes including growth, metabolism, and autophagy.
- Autophagy plays a complex role in cancer cell survival and death.
- TOR inhibitors show promise as anti-cancer therapeutics by modulating these pathways.
Conclusions:
- Understanding the TOR-autophagy axis is crucial for cancer biology.
- Targeting TOR offers a potential therapeutic strategy for various cancers.
- Further research is needed to fully delineate the complex interplay and optimize clinical applications.
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