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Related Concept Videos

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,...
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,...
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...
Disorders of the Nervous Tissue01:28

Disorders of the Nervous Tissue

Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
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ATP Synthase: Mechanism01:48

ATP Synthase: Mechanism

In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased ATP...
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,...

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Related Experiment Video

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Analysis of Brain Mitochondria Using Serial Block-Face Scanning Electron Microscopy
07:47

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Published on: July 9, 2016

A neurological perspective on mitochondrial disease.

Robert McFarland1, Robert W Taylor, Douglass M Turnbull

  • 1Mitochondrial Research Group, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, UK.

The Lancet. Neurology
|July 24, 2010
PubMed
Summary

Mitochondrial disease disrupts cellular energy production, affecting multiple systems, especially the brain, nerves, and muscles. Recent genetic discoveries are improving diagnosis and management for neurologists.

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Area of Science:

  • Biochemistry
  • Genetics
  • Neurology

Background:

  • Mitochondrial disease arises from disruptions in the mitochondrial respiratory chain, the cell's primary energy production pathway.
  • These disorders manifest as a variable group of multisystem conditions, frequently impacting the brain, nerves, and muscles.
  • Mitochondrial diseases represent a significant category of inherited neurological disorders.

Purpose of the Study:

  • To highlight the critical role of neurologists in diagnosing and managing mitochondrial diseases.
  • To underscore the genetic heterogeneity of these disorders, caused by mutations in both mitochondrial and nuclear DNA.
  • To emphasize the implications of recent genetic advancements for clinical practice.

Main Methods:

  • Review of current understanding of mitochondrial respiratory chain function.
  • Analysis of genetic causes, including mitochondrial and nuclear DNA mutations.
  • Synthesis of diagnostic and management strategies for neurologists.

Main Results:

  • Mitochondrial diseases are a common cause of inherited neurological conditions.
  • Genetic basis is increasingly understood, with mutations in mitochondrial and nuclear DNA identified.
  • Progress in genetics offers new avenues for diagnosis and treatment.

Conclusions:

  • Neurologists are central to the care of patients with mitochondrial disease.
  • Advances in understanding the genetic underpinnings are transforming diagnosis and management.
  • Multidisciplinary approaches are essential for effective patient care.