Related Experiment Video
Updated: Oct 22, 2025
10:36
Measurements of Physiological Stress Responses in C. Elegans
Published on: May 21, 2020
14.3K
Adding Some "Splice" to Stress Eating: Autophagy, ESCRT and Alternative Splicing Orchestrate the Cellular Stress
Elias Habib1, Allyson Cook1, Sabateeshan Mathavarajah1
1Department of Pathology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
Genes
|August 27, 2021
Summary
Autophagy maintains cellular health by recycling components. Dysregulation of the ESCRT machinery and alternative splicing in autophagy contributes to diseases like cancer and neurodegeneration.
Area of Science:
- Cell Biology
- Molecular Biology
- Genetics
Background:
- Autophagy is a crucial cellular process for maintaining homeostasis by degrading damaged components.
- The endosomal sorting complexes required for transport (ESCRT) machinery regulates autophagosome fusion, a key step in autophagy.
- Dysfunction in autophagy is linked to various human diseases, including cancer and neurodegenerative disorders.
Purpose of the Study:
- To review the roles of ESCRT machinery and alternative splicing in autophagy regulation.
- To explore how dysregulation of these processes contributes to human diseases.
- To highlight the complexity of cellular stress response through autophagy and splicing.
Main Methods:
- Literature review of studies on autophagy, ESCRT, and alternative splicing.
- Analysis of the interplay between these pathways in cellular homeostasis and disease.
- Synthesis of current knowledge on the implications of their dysfunction.
Main Results:
- The ESCRT machinery is integral to autophagosome fusion; its disruption causes autophagosome accumulation.
- Alternative pre-mRNA splicing allows adaptive proteome changes in response to cellular stress.
- Dysregulation of autophagy and ESCRT-related splicing can impair cellular stress response or lead to pathogenic maladaptive responses.
Conclusions:
- Autophagy, ESCRT, and alternative splicing are interconnected pathways critical for cellular health.
- Imbalances in these pathways, particularly through dysregulated splicing, can precipitate or exacerbate disease states.
- Understanding these molecular mechanisms offers insights into potential therapeutic strategies for autophagy-related disorders.
Related Concept Videos
01:31Regulation of the Unfolded Protein Response
2.7K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.7K
01:37The Unfolded Protein Response
5.5K
The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...
5.5K
01:30Other Stress Responses in Bacteria
125
Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
125
01:27Autophagy
4.9K
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,...
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
4.9K
01:17Role of ER in the Secretory Pathway
6.1K
Eukaryotic cells have a special pathway that enables communication between various intracellular membrane-bound compartments and also with the extracellular environment. This pathway is termed as the secretory pathway.
Components of the secretory pathway
About a third of proteins synthesized in the cell are sorted via the secretory route. They shuffle between different compartments in membrane-bound vesicles until they reach their final destination. The main intracellular compartments involved...
Components of the secretory pathway
About a third of proteins synthesized in the cell are sorted via the secretory route. They shuffle between different compartments in membrane-bound vesicles until they reach their final destination. The main intracellular compartments involved...
6.1K
01:23Stringent Response in E. coli
94
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
94