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mTOR Signaling and Cancer Progression

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...

mTOR Signaling and Cancer Progression

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...

PI3K/mTOR/AKT Signaling Pathway

PI3K/mTOR/AKT Signaling Pathway

The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a rapamycin-insensitive companion...

MAPK Signaling Cascades

MAPK Signaling Cascades

Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...

Interactions Between Signaling Pathways

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...

Electron Transport Chain: Complex I and II

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...

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Related Experiment Video

Updated: Jun 23, 2026

Isolation of Primary Mouse Hepatocytes for Nascent Protein Synthesis Analysis by Non-radioactive L-azidohomoalanine Labeling Method

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Focus Issue: demystifying mTOR signaling.

Science Signaling

|April 23, 2009

Summary

This summary is machine-generated.

The mammalian target of rapamycin (mTOR) pathway integrates cell signals for growth. New research reveals its links to vascular disease, offering therapeutic targets.

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Area of Science:

Cellular Biology
Molecular Signaling
Physiology

Background:

The mammalian target of rapamycin (mTOR) pathway is a central regulator of cell growth, metabolism, and survival.
mTOR functions in two distinct complexes, mTORC1 and mTORC2, with intricate regulatory networks.
Aberrant mTOR signaling is implicated in various diseases, including vascular disorders.

Discussion:

Recent studies have uncovered novel interactions between epidermal growth factor receptors (EGFRs) and the mTOR pathway.
These findings provide deeper understanding of mTOR's role in the complex signaling cascades governing vascular health.
The interconnectedness of mTORC1 and mTORC2 regulation highlights the complexity of cellular response to stimuli.

Key Insights:

New research elucidates previously unknown connections between EGFR signaling and the mTOR pathway.
Significant insights into the specific roles of mTOR signaling in the pathogenesis of vascular disease have been generated.
Pharmacological tools and genetic approaches targeting complex-specific subunits are crucial for dissecting mTOR function.

Outlook:

Advanced pharmacological tools and gene knockdown techniques are enabling precise investigation of mTORC1 and mTORC2.
These methods offer new avenues for therapeutic interventions targeting diseases driven by dysregulated mTOR signaling.
Future research will likely focus on translating these insights into clinical applications for vascular and other diseases.