Related Experiment Video

Updated: Jun 7, 2026

The Use of Primary Human Fibroblasts for Monitoring Mitochondrial Phenotypes in the Field of Parkinson's Disease
15:09

The Use of Primary Human Fibroblasts for Monitoring Mitochondrial Phenotypes in the Field of Parkinson's Disease

Published on: October 3, 2012

Possible involvement of a mitochondrial translation initiation factor 3 variant causing decreased mRNA levels in

Anna Anvret1, Caroline Ran, Marie Westerlund

  • 1Department of Neuroscience, Karolinska Institutet, 171 77 Stockholm, Sweden.

Parkinson'S Disease
|October 27, 2010
PubMed

Insights

Mitochondrial translation initiation factor 3 (MTIF3) gene variants may influence Parkinson's disease (PD) risk. A specific MTIF3 gene variant (rs7669) showed a significant association with PD in a Swedish population, impacting gene expression.

Area of Science:

  • Genetics
  • Neuroscience
  • Mitochondrial Biology

Background:

  • Mitochondrial dysfunction is linked to Parkinson's disease (PD) pathogenesis.
  • Dopamine neurons are vulnerable to oxidative stress, a factor in PD.
  • Mitochondrial translation initiation factor 3 (MTIF3) plays a crucial role in mitochondrial protein synthesis.

Purpose of the Study:

  • To investigate the association of the synonymous MTIF3 gene variant rs7669(C>T) with Parkinson's disease in a Swedish population.
  • To determine if the rs7669 variant affects MTIF3 mRNA expression.

Main Methods:

  • Case-control study design.
  • Genotyping of the MTIF3 rs7669 polymorphism in Swedish PD patients and controls.
  • Quantitative analysis of MTIF3 mRNA expression based on genotype.

Main Results:

  • No significant association was found for individual genotypes or alleles of rs7669 with PD.
  • A significant association was observed between combined TT/CT genotypes and PD risk (P = .0473).
  • The TT genotype was associated with significantly decreased MTIF3 mRNA expression compared to the CC genotype (P = .0163).

Conclusions:

  • The MTIF3 gene variant rs7669 may be involved in the etiology of Parkinson's disease.
  • Reduced MTIF3 expression associated with the TT genotype might contribute to PD pathogenesis.
  • These findings warrant further investigation into MTIF3's role in neurodegenerative diseases.

Related Concept Videos

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
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
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...
Parkinson Disease l: Introduction01:24

Parkinson Disease l: Introduction

Parkinson’s disease is a chronic, progressive neurodegenerative disorder that primarily affects movement. It is characterized by motor symptoms such as resting tremors, muscle rigidity, bradykinesia (slowness of movement), and postural instability. Patients may notice hand tremors at rest, stiffness during movement, or a shuffling gait. In addition to motor features, non-motor symptoms include sleep disturbances, mood and behavioral changes, constipation, and cognitive impairment, all of which...
Alterations in Muscle Tone lll01:11

Alterations in Muscle Tone lll

Rigidity and myotonia are distinct abnormalities of muscle tone that affect resistance and relaxation during movement. Although both involve altered muscle contraction, they arise from different neurological and muscular mechanisms.CharacteristicsRigidity is characterized by uniform resistance to passive movement across the entire range, independent of speed, affecting flexors and extensors equally. It may appear as lead-pipe rigidity (smooth, constant resistance) or cogwheel rigidity...
Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...