Association Between Atg5-independent Alternative Autophagy and Neurodegenerative Diseases

Shinya Honda1, Satoko Arakawa1, Hirofumi Yamaguchi1

  • 1Department of Pathological Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.

Insights

Autophagy degrades cellular waste, impacting neurodegenerative disease severity. Canonical autophagy is a therapeutic target, while alternative autophagy

Area of Science:

  • Cellular Biology
  • Neuroscience

Background:

  • Autophagy is a key cellular process for degrading misfolded proteins and damaged organelles.
  • Accumulation of cellular waste is implicated in the progression of neurodegenerative diseases.
  • Autophagy plays a crucial role in regulating the severity of these conditions.

Purpose of the Study:

  • To explore the role of autophagy in neurodegenerative diseases.
  • To differentiate the functions of canonical and alternative autophagy.
  • To investigate the potential of autophagy modulation as a therapeutic strategy.

Main Methods:

  • Literature review on autophagy mechanisms.
  • Analysis of studies investigating canonical autophagy in neurodegenerative disease models.
  • Review of emerging research on alternative autophagy pathways.

Main Results:

  • Canonical autophagy has been successfully targeted in therapeutic strategies for neurodegenerative diseases.
  • The precise role of alternative autophagy in neurodegeneration remains unclear.
  • Alternative autophagy is hypothesized to be involved in the pathogenesis of diseases like Alzheimer's disease.

Conclusions:

  • Autophagy is a critical cellular mechanism influencing neurodegenerative disease progression.
  • Canonical autophagy offers established therapeutic avenues.
  • Further research into alternative autophagy is warranted to understand its role and potential therapeutic applications in neurodegenerative disorders.

Related Concept Videos

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,...
5.6K
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...
4.2K
Lysosomal Hydrolases01:22

Lysosomal Hydrolases

Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
4.4K
Alzheimer's Disease: Overview01:26

Alzheimer's Disease: Overview

Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
1.5K
Neural Regulation01:37

Neural Regulation

Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
43.0K