Mitochondrial DNA is a major source of driver mutations in cancer

Minsoo Kim1, Mahnoor Mahmood2, Ed Reznik3

  • 1Computational Oncology Service, Memorial Sloan Kettering Cancer Center, New York, NY, USA.

Trends in Cancer
|August 30, 2022
PubMed

Insights

Mitochondrial DNA (mtDNA) mutations are common in tumors and affect metabolism. Recent advances in sequencing and engineering are clarifying their role in cancer initiation and progression.

Area of Science:

  • Oncology
  • Genetics
  • Metabolic Research

Background:

  • Mitochondrial DNA (mtDNA) mutations are frequent in tumors, impacting cellular metabolism.
  • The precise role of these mutations in cancer has been debated due to historical data and methodological limitations.

Purpose of the Study:

  • To review the historical context and recent breakthroughs in understanding mitochondrial oncogenetics.
  • To highlight the challenges and future directions in studying mtDNA mutations in cancer.

Main Methods:

  • Review of historical and recent scientific literature.
  • Discussion of advancements in tumor mtDNA sequencing and mitochondrial genome engineering techniques.

Main Results:

  • Significant barriers to studying mtDNA mutations in cancer have been overcome.
  • A clearer understanding of the functional impact of mtDNA mutations in tumorigenesis is emerging.

Conclusions:

  • Mitochondrial oncogenetics is a rapidly advancing field with major implications for cancer research.
  • Further research is needed to fully elucidate the role of mtDNA mutations in cancer initiation and progression.

Related Concept Videos

Animal Mitochondrial Genetics02:59

Animal Mitochondrial Genetics

Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
7.9K
Cancers Originate from Somatic Mutations in a Single Cell02:21

Cancers Originate from Somatic Mutations in a Single Cell

Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
12.5K
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,...
14.3K
Spontaneous and Induced Mutations01:30

Spontaneous and Induced Mutations

Spontaneous mutations arise infrequently during DNA replication due to errors in the process. A key factor behind these errors is tautomeric shifts in nitrogenous bases, where bases transition from keto to enol forms or amino to imino forms. This shift can alter base-pairing rules, leading to mutations. Additionally, reactive oxygen species (ROS) arising from aerobic metabolism can damage DNA, resulting in depurination (loss of a purine base) or depyrimidination (loss of a pyrimidine base).
120
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,...
5.9K
Mutations01:39

Mutations

Overview
84.2K