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Mitochondrial dysfunction and mitochondrial dynamics-The cancer connection
Satish Srinivasan1, Manti Guha1, Anna Kashina1
1The Department of Biomedical Sciences, School of Veterinary Medicine, University of Pennsylvania, 3800 Spruce Street, #189E, Philadelphia, PA 19104, United States.
Abstract:
Mitochondrial dysfunction is a hallmark of many diseases. The retrograde signaling initiated by dysfunctional mitochondria can bring about global changes in gene expression that alters cell morphology and function. Typically, this is attributed to disruption of important mitochondrial functions, such as ATP production, integration of metabolism, calcium homeostasis and regulation of apoptosis. Recent studies showed that in addition to these factors, mitochondrial dynamics might play an important role in stress signaling. Normal mitochondria are highly dynamic organelles whose size, shape and network are controlled by cell physiology. Defective mitochondrial dynamics play important roles in human diseases. Mitochondrial DNA defects and defective mitochondrial function have been reported in many cancers. Recent studies show that increased mitochondrial fission is a pro-tumorigenic phenotype. In this paper, we have explored the current understanding of the role of mitochondrial dynamics in pathologies. We present new data on mitochondrial dynamics and dysfunction to illustrate a causal link between mitochondrial DNA defects, excessive fission, mitochondrial retrograde signaling and cancer progression. This article is part of a Special Issue entitled Mitochondria in Cancer, edited by Giuseppe Gasparre, Rodrigue Rossignol and Pierre Sonveaux.
Insights
Mitochondrial dysfunction and excessive fission link to cancer progression. This study explores how mitochondrial dynamics, DNA defects, and retrograde signaling contribute to cancer development.
Area of Science:
- Cell Biology
- Molecular Biology
- Oncology
Background:
- Mitochondrial dysfunction is central to numerous diseases.
- Retrograde signaling from damaged mitochondria alters gene expression, cell function, and morphology.
- Mitochondrial dynamics, crucial for organelle health, are increasingly implicated in disease.
Purpose of the Study:
- To explore the role of mitochondrial dynamics in pathologies.
- To present data linking mitochondrial DNA defects, excessive fission, and retrograde signaling to cancer progression.
- To understand the causal relationship between mitochondrial dynamics and cancer.
Main Methods:
- Review of current literature on mitochondrial dynamics and disease.
- Presentation of new data on mitochondrial dynamics and dysfunction.
- Analysis of the link between mitochondrial DNA defects, fission, signaling, and cancer.
Main Results:
- Increased mitochondrial fission is associated with a pro-tumorigenic phenotype.
- Mitochondrial DNA defects and dysfunction are prevalent in cancers.
- Mitochondrial dynamics play a significant role in stress signaling and disease.
Conclusions:
- Mitochondrial dynamics are critical in cellular stress responses and pathologies.
- A causal link exists between mitochondrial DNA defects, excessive fission, retrograde signaling, and cancer progression.
- Understanding mitochondrial dynamics offers new insights into cancer development and potential therapeutic strategies.
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