Targeting chaperone-mediated autophagy in cancer

Related Experiment Video

Updated: May 27, 2026

Cell-Based Drug Screening for Inhibitors of Autophagy Related 4B Cysteine Peptidase
09:51

Cell-Based Drug Screening for Inhibitors of Autophagy Related 4B Cysteine Peptidase

Published on: June 30, 2023

Andrew Thorburn1, Jayanta Debnath

  • 1Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO 80045, USA.

Science Translational Medicine
|November 18, 2011
PubMed

Insights

Chaperone-mediated autophagy (CMA) is elevated in tumors and fuels cancer growth and metastasis. Inhibiting CMA effectively slows tumor progression, enhances cancer cell death, and promotes tumor regression, offering a new therapeutic strategy.

Area of Science:

  • Oncology
  • Cellular Biology
  • Molecular Medicine

Background:

  • Autophagy, a cellular degradation process, plays a complex role in cancer.
  • Chaperone-mediated autophagy (CMA) is a selective form of autophagy implicated in cellular homeostasis.

Purpose of the Study:

  • To investigate the role of chaperone-mediated autophagy (CMA) in tumor growth and metastasis.
  • To determine if inhibiting CMA can be a viable cancer treatment strategy.

Main Methods:

  • Analysis of CMA levels in tumor tissues.
  • Experimental inhibition of CMA in preclinical cancer models.
  • Assessment of tumor growth, metastasis, cell death, and regression upon CMA inhibition.

Main Results:

  • Chaperone-mediated autophagy (CMA) is consistently elevated in various tumors.
  • CMA is essential for optimal tumor growth and the metastatic process.
  • Selective inhibition of CMA significantly slows tumor growth.
  • CMA inhibition leads to increased tumor cell death and regression of established tumors.

Conclusions:

  • Elevated chaperone-mediated autophagy (CMA) is a critical factor in cancer progression.
  • Targeting CMA represents a promising therapeutic strategy for cancer treatment.
  • Further research into CMA pathway manipulation for cancer therapy is warranted.

More Related Videos

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy07:20

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy

Published on: January 31, 2025

Quantitative Analysis of Autophagy using Advanced 3D Fluorescence Microscopy09:59

Quantitative Analysis of Autophagy using Advanced 3D Fluorescence Microscopy

Published on: May 3, 2013

Related Concept Videos

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...
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,...
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
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 pro-apoptotic...
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...