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Related Concept Videos

Multiple Sclerosis l: Introduction01:19

Multiple Sclerosis l: Introduction

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Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...
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Parkinson Disease ll: Pathophysiology01:24

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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...
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Mitochondria01:37

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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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Mitochondrial Membranes01:45

Mitochondrial Membranes

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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,...
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Parkinson's Disease: Overview01:15

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Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
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Author Spotlight: Decoding Mitochondrial Aging
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Mitochondrial dysfunction contributes to neurodegeneration in multiple sclerosis.

Maarten E Witte1, Don J Mahad2, Hans Lassmann3

  • 1Department of Molecular Cell Biology and Immunology, VU University Medical Center, 1081BT, Amsterdam, The Netherlands.

Trends in Molecular Medicine
|December 28, 2013
PubMed
Summary

Mitochondrial dysfunction contributes to neuronal damage in multiple sclerosis (MS). Targeting mitochondria may offer new treatments for progressive MS by addressing neuronal loss.

Keywords:
mitochondriamultiple sclerosisneurodegenerationneuroinflammationoxidative stress

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Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Multiple sclerosis (MS) is a central nervous system inflammatory demyelinating disease.
  • Current MS treatments reduce neuroinflammation but do not halt disease progression or neuronal loss.
  • Dysfunctional mitochondria are increasingly recognized as key contributors to axonal and neuronal damage in MS.

Purpose of the Study:

  • To provide a comprehensive overview of mitochondrial dysfunction in MS.
  • To explore the role of leukocytes and microglia in MS-related mitochondrial impairment.
  • To highlight the potential of mitochondrial-targeted therapies for progressive MS.

Main Methods:

  • Review of current scientific literature on mitochondrial dysfunction in MS.
  • Analysis of findings from animal models and histopathological studies.
  • Synthesis of knowledge on the causes and consequences of impaired mitochondrial function.

Main Results:

  • Infiltrating leukocytes and activated microglia are implicated in neuronal mitochondrial dysfunction in MS.
  • Impaired mitochondrial function is a significant factor in progressive neurodegeneration in MS.
  • Understanding these mechanisms provides a foundation for novel therapeutic strategies.

Conclusions:

  • Mitochondrial dysfunction is a critical factor in the progression of multiple sclerosis.
  • Targeting mitochondrial pathways offers a promising avenue for developing new treatments to combat progressive MS and prevent neuronal loss.