Related Experiment Video

Updated: Aug 16, 2026

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
06:41

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

Published on: August 20, 2019

mtDNA mutations and common neurodegenerative disorders

Neil Howell1, Joanna L Elson, Patrick F Chinnery

  • 1Migenix Corporation, San Diego, CA 92130, USA.

Trends in Genetics : TIG
|September 13, 2005
PubMed

Insights

Mitochondrial DNA (mtDNA) mutations are investigated for their role in neurodegenerative diseases like Alzheimer's disease (AD) and Parkinson's disease (PD). Current evidence is inconclusive regarding the direct involvement of mtDNA mutations in AD and PD pathogenesis.

Area of Science:

  • Neuroscience
  • Genetics
  • Cell Biology

Background:

  • Alzheimer's disease (AD) and Parkinson's disease (PD) incidence is rising with aging populations.
  • Both AD and PD are linked to oxidative stress and mitochondrial dysfunction.
  • Mitochondrial genome mutations are hypothesized to contribute to neurodegeneration in AD and PD.

Purpose of the Study:

  • To evaluate the role of heteroplasmic mitochondrial DNA (mtDNA) mutations in Alzheimer's disease (AD) and Parkinson's disease (PD).

Main Methods:

  • Review and synthesis of recent publications and existing evidence on mtDNA mutations in neurodegenerative diseases.

Main Results:

  • Recent studies suggest a potential involvement of heteroplasmic mtDNA mutations in AD and PD.
  • However, the overall body of evidence remains insufficient to establish a definitive role.

Conclusions:

  • The precise contribution of mitochondrial DNA mutations to the development of Alzheimer's disease and Parkinson's disease requires further investigation.
  • Establishing the role of mtDNA mutations is crucial for understanding neurodegeneration in AD and PD.

More Related Videos

Using Live Cell STED Imaging to Visualize Mitochondrial Inner Membrane Ultrastructure in Neuronal Cell Models08:48

Using Live Cell STED Imaging to Visualize Mitochondrial Inner Membrane Ultrastructure in Neuronal Cell Models

Published on: June 30, 2023

Related Concept Videos

Mutations01:39

Mutations

Overview
Mutations01:35

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Alzheimer Disease l: Introduction01:29

Alzheimer Disease l: Introduction

Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
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...
Parkinson Disease ll: Pathophysiology01:24

Parkinson Disease ll: Pathophysiology

Parkinson disease (PD) is a progressive neurodegenerative disorder primarily affecting movement, with additional non-motor features. Its pathophysiology involves complex interactions among genetic susceptibility, environmental exposures, and cellular dysfunction, including dopaminergic neuron loss, protein aggregation, and mitochondrial impairment.Selective NeurodegenerationA key feature is the degeneration of dopaminergic neurons in the substantia nigra pars compacta, leading to reduced...
Translation01:31

Translation

Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life