Related Experiment Video

Updated: Mar 11, 2026

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
07:20

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy

Published on: January 31, 2025

1.3K

Tor-dependent post-transcriptional regulation of autophagy: Implications for cancer therapeutics

Guowu Hu1, Travis McQuiston1, Amélie Bernard2

  • 1Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health , Bethesda, MD, USA.

Molecular & Cellular Oncology
|November 19, 2016
PubMed

Insights

Autophagy, regulated by the target of rapamycin (Tor1), paradoxically aids both cancer suppression and tumor growth. Understanding how Tor regulates autophagy via a new post-transcriptional mechanism could improve cancer therapy design.

Area of Science:

  • Molecular biology
  • Cancer research
  • Cellular signaling

Background:

  • Autophagy plays a dual role in cancer, supporting both immunosurveillance and tumor progression.
  • The target of rapamycin (Tor1) pathway is a key regulator of autophagy.
  • The precise mechanisms by which Tor1 influences autophagy in cancer remain incompletely understood.

Purpose of the Study:

  • To elucidate a novel post-transcriptional regulatory mechanism of autophagy by Tor1.
  • To explore the implications of this mechanism for the design of novel cancer therapeutics.
  • To reconcile the paradoxical roles of autophagy in cancer immunity and progression.

Main Methods:

  • Investigated the post-transcriptional regulation of autophagy by Tor1 using molecular biology techniques.
  • Utilized conserved biological pathways to identify the mechanism.
  • Analyzed the impact of this regulation on cancer progression models.

Main Results:

  • Identified a highly conserved post-transcriptional mechanism through which Tor1 regulates autophagy.
  • Demonstrated that this mechanism influences the dual role of autophagy in cancer.
  • Provided new insights into the complex interplay between Tor1, autophagy, and cancer.

Conclusions:

  • The newly described Tor1-mediated post-transcriptional regulation of autophagy offers a potential new target for cancer therapy.
  • Understanding this mechanism is crucial for designing effective cancer treatments that modulate autophagy.
  • This finding could help resolve the paradoxical roles of autophagy in cancer progression and immunosurveillance.
Keywords:
AutoimmunityTorautophagyoncologypharmacologyphosphorylationtumor immunology

More Related Videos

Author Spotlight: A Selective Luciferase-Based Assay for Monitoring ATG4B 27 Activity in Cells09:51

Author Spotlight: A Selective Luciferase-Based Assay for Monitoring ATG4B 27 Activity in Cells

Published on: June 30, 2023

1.5K
siRNA Electroporation to Modulate Autophagy in Herpes Simplex Virus Type 1-Infected Monocyte-Derived Dendritic Cells09:10

siRNA Electroporation to Modulate Autophagy in Herpes Simplex Virus Type 1-Infected Monocyte-Derived Dendritic Cells

Published on: October 28, 2019

7.8K

Related Concept Videos

mTOR Signaling and Cancer Progression03:03

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...
5.0K
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

1.6K
Autophagy01:27

Autophagy

Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
6.0K
Delivery Pathways to the Lysosome01:36

Delivery Pathways to the Lysosome

Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
10.4K
Regulation of Expression at Multiple Steps01:23

Regulation of Expression at Multiple Steps

The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
1.5K
Autophagic Cell Death01:18

Autophagic Cell Death

Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
4.9K