Mitochondria act as a key regulatory factor in cancer progression: Current concepts on mutations, mitochondrial

Sraddhya Roy1, Ananya Das1, Aparajita Bairagi1

  • 1Chittaranjan National Cancer Institute, 37 S. P. Mukherjee Road, Kolkata 700026, India.

Insights

Mitochondrial dysfunction, driven by genetic and epigenetic changes, significantly impacts cancer development and progression. Targeting mitochondria offers promising anti-cancer therapeutic strategies.

Area of Science:

  • Biochemistry
  • Oncology
  • Genetics

Background:

  • Mitochondria are vital for cellular homeostasis, but their dysfunction, particularly due to mitochondrial DNA (mtDNA) alterations, disrupts cellular balance and contributes to disease.
  • Mitochondrial imbalances can initiate genetic mutations, promoting tumorigenesis, cancer progression, and survival.

Purpose of the Study:

  • To comprehensively review epigenetic and genetic alterations affecting mitochondrial function in cancer.
  • To explore the roles of cellular metabolism, ethnicity, mitochondrial dynamics, miRNAs, and exosomes in cancer promotion.
  • To summarize current therapeutic strategies targeting mitochondria for anti-cancer treatment.

Main Methods:

  • Literature review of epigenetic and genetic alterations impacting mitochondrial function.
  • Analysis of factors influencing mitochondrial function, including cellular metabolism and ethnicity.
  • Review of recent insights into mitochondrial dynamics, miRNAs, exosomes, and immune cell interactions.
  • Summary of emerging therapeutic approaches targeting mitochondria in cancer treatment.

Main Results:

  • Mitochondrial dysfunction is implicated in numerous diseases, notably cancer, through genetic and epigenetic modifications.
  • Alterations in mitochondrial dynamics, miRNAs, and exosomes play significant roles in cancer promotion and immune evasion.
  • Ethnicity can influence the impact of mitochondrial dysfunction on cancer.

Conclusions:

  • Mitochondrial dysfunction is a critical factor in cancer initiation and progression.
  • Understanding mitochondrial alterations provides avenues for novel anti-cancer therapies.
  • Targeting mitochondria represents a promising frontier in cancer treatment strategies.

Related Concept Videos

Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
13.3K
Mitochondrial Membranes01:45

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
10.3K
Mitochondria01:37

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
12.5K
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...
3.8K
Adaptive Mechanisms in Cancer Cells02:53

Adaptive Mechanisms in Cancer Cells

Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
5.8K
The Inner Mitochondrial Membrane01:28

The Inner Mitochondrial Membrane

The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria.  In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
3.4K