Related Experiment Video
Updated: Jun 27, 2025

10:36
Measurements of Physiological Stress Responses in C. Elegans
Published on: May 21, 2020
13.9K
Socialized mitochondria: mitonuclear crosstalk in stress
1Department of Health Sciences, The Graduate School of Dong-A University, 840 Hadan-dong, Saha-gu, Busan, 49315, Korea. kyungkim@dau.ac.kr.
Experimental & Molecular Medicine
|April 30, 2024
Summary
Mitochondria, traditionally known for energy, are now recognized as signaling hubs. Stress triggers beneficial responses, revealing new insights into cellular homeostasis and disease.
Area of Science:
- Cell Biology
- Mitochondrial Biology
- Organelle Communication
Background:
- Mitochondria traditionally viewed as energy powerhouses.
- Emerging evidence highlights mitochondria as key signaling organelles.
- Mitochondria interact with other cellular components.
Purpose of the Study:
- To review current understanding of mitochondria as signaling organelles.
- To examine mitochondria-to-nucleus (mitonuclear) communication.
- To explore the role of mitochondrial stress responses.
Main Methods:
- Literature review of recent studies on mitochondrial signaling.
- Analysis of pathways involved in mitochondrial stress response.
- Examination of inter-organelle communication mechanisms.
Main Results:
- Mitochondria actively participate in intracellular signaling networks.
- Mitochondrial stress induces adaptive responses that restore homeostasis.
- Mitochondria-to-nucleus communication is a critical stress response pathway.
Conclusions:
- Mitochondria are dynamic signaling organelles crucial for cellular health.
- Understanding mitochondrial signaling offers potential for disease intervention.
- Further research into mitochondrial communication may unlock lifespan extension strategies.
Related Concept Videos
Hypothalamic-Pituitary Axis
59.9K
The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
59.9K
Physiological Foundation of Stress
56
Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
Role of the Sympathetic Nervous System
Adrenaline triggers the...
Role of the Sympathetic Nervous System
Adrenaline triggers the...
56
Interactions Between Signaling Pathways
6.3K
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...
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...
6.3K
Regulation of the Unfolded Protein Response
2.4K
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...
2.4K
Psychoneuroimmunology: Diabetes and Cancer
28
Chronic stress has been linked to both the onset and progression of serious health conditions, including Type 2 diabetes and cancer. Type 2 diabetes, a widespread chronic illness, is closely associated with obesity and insulin resistance, both of which often worsen under stress. Studies indicate that men experiencing high levels of chronic stress face a 45% higher risk of developing diabetes compared to those with minimal stress. Stress triggers physiological responses that elevate blood...
28
Microtubule Instability
5.1K
Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated...
5.1K

