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Related Concept Videos

Mitochondria01:37

Mitochondria

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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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The Inner Mitochondrial Membrane01:28

The Inner Mitochondrial Membrane

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The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria.  In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
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Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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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,...
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Animal Mitochondrial Genetics02:59

Animal Mitochondrial Genetics

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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...
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Cells of the Innate Immune Response01:28

Cells of the Innate Immune Response

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The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
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Related Experiment Video

Updated: Jun 25, 2025

Real-Time Measurement of the Mitochondrial Bioenergetic Profile of Neutrophils
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Real-Time Measurement of the Mitochondrial Bioenergetic Profile of Neutrophils

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Multifaceted mitochondria in innate immunity.

Eloïse Marques1, Robbin Kramer1, Dylan G Ryan1

  • 1MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, UK.

Npj Metabolic Health and Disease
|May 30, 2024
PubMed
Summary
This summary is machine-generated.

Mitochondria are crucial for immunity beyond energy production, influencing innate immune cell functions. Understanding mitochondrial roles in inflammation and defense offers new therapeutic avenues for immune disorders.

Keywords:
Energy metabolismMitochondria

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Area of Science:

  • Immunology
  • Cell Biology
  • Mitochondrial Biology

Background:

  • Mitochondria traditionally known for energy production (phosphorylation potential).
  • Emerging roles highlight mitochondria as key signal-transducing organelles in immunity.
  • Mitochondria possess bacterial motifs from endosymbiotic origin, recognized by innate immune cells.

Purpose of the Study:

  • To review how mitochondrial physiology impacts phagocyte effector functions.
  • To explore signaling pathways involving mitochondrial nucleic acids, metabolites, and lipids in immunity.
  • To connect mitochondrial roles to macrophage polarization, efferocytosis, and cytokine regulation.

Main Methods:

  • Literature review focusing on mitochondrial physiology and innate immunity.
  • Analysis of oxidative phosphorylation (OxPhos) and mitochondrial signaling pathways.
  • Examination of mitochondrial influence on phagocyte effector functions.

Main Results:

  • Mitochondrial functions extend beyond bioenergetics to critical immune signaling.
  • Mitochondrial components (nucleic acids, metabolites, lipids) modulate immune responses.
  • Dysregulation of mitochondrial processes contributes to disease and injury.

Conclusions:

  • Mitochondria play a central role in innate immune system effector functions.
  • Understanding these roles can inform novel therapeutic strategies for inflammatory diseases.
  • Mitochondrial signaling is vital for maintaining organismal homeostasis.