Mitochondrial Disease and Cancer Mutations in the genes that...

Name: Problem 21, Chapter 19: Principles of Biochemistry
Uploaded: 2021-03-13T11:58:16-08:00
Duration: 1 min 33 s
Channel: Aadit Sharma
Description: Mitochondrial Disease and Cancer Mutations in the genes that encode certain mitochondrial proteins are associated with a high incidence of some types of cancer. How might defective mitochondria lead to cancer?

Mitochondrial Disease and Cancer Mutations in the genes that encode certain mitochondrial proteins are associated with a high incidence of some types of cancer. How might defective mitochondria lead to cancer?

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Key Concepts

Mitochondrial Dysfunction

Mitochondria are responsible for producing the energy that a cell needs to function. Defective mitochondria can impair energy metabolism, alter cellular homeostasis, and disrupt normal cell functions, which can create an environment conducive to uncontrolled cell growth and cancer development.

Reactive Oxygen Species (ROS) and Genomic Instability

When mitochondria are dysfunctional, they often generate increased levels of reactive oxygen species (ROS). These ROS can damage cellular components, including DNA, leading to mutations and genomic instability, which are key factors in the transformation of normal cells to cancerous cells.

Apoptosis Dysregulation

Mitochondria play a critical role in regulating apoptosis, the process of programmed cell death. Defective mitochondria may fail to trigger apoptosis in damaged or mutated cells, allowing abnormal cells to survive and proliferate, thereby contributing to tumor development.

Metabolic Reprogramming

Cancer cells often undergo metabolic reprogramming, shifting their energy production from oxidative phosphorylation to glycolysis, a phenomenon known as the Warburg effect. Defective mitochondrial function may force cells to adopt alternative metabolic pathways, which can support the rapid growth and survival of cancer cells even under adverse conditions.

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