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Related Concept Videos

Mitochondria01:37

Mitochondria

17.4K
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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Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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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.
ROS generation is regulated and maintained at moderate levels necessary...
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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,...
9.8K
Mitochondrial Membranes01:45

Mitochondrial Membranes

14.7K
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,...
14.7K
Mitochondrial Precursor Proteins01:39

Mitochondrial Precursor Proteins

3.2K
Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70  chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial...
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Updated: Nov 11, 2025

Experimental Protocol for Detecting Mitochondrial Function in Hepatocytes Exposed to Organochlorine Pesticides
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Targeting the Mitochondria-Proteostasis Axis to Delay Aging.

Andreas Zimmermann1,2, Corina Madreiter-Sokolowski3, Sarah Stryeck4

  • 1Institute of Molecular Biosciences, University of Graz, Graz, Austria.

Frontiers in Cell and Developmental Biology
|March 29, 2021
PubMed
Summary
This summary is machine-generated.

Strategies targeting mitochondria and protein homeostasis, particularly autophagy, can delay aging and related diseases. Interventions acting on the mitochondria-proteostasis axis offer promising therapeutic potential for extending healthspan.

Keywords:
aginganti-aging targetsautophagymitochondriaproteostasis

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Area of Science:

  • Gerontology and cellular biology
  • Molecular mechanisms of aging

Background:

  • Increasing human life expectancy correlates with a rise in age-related chronic diseases, imposing significant societal burdens.
  • Current treatments often address single comorbidities, lacking holistic approaches for multifaceted age-related dysfunctions.
  • There is a critical need for novel therapies targeting the fundamental processes of aging itself.

Purpose of the Study:

  • To summarize current anti-aging strategies focused on mitochondria and protein homeostasis.
  • To highlight the role of autophagy in mitochondrial quality control and its link to aging.
  • To explore the therapeutic potential of targeting the mitochondria-proteostasis axis.

Main Methods:

  • Review of genetic and pharmacological interventions affecting aging.
  • Focus on molecular targets within mitochondria and pathways promoting autophagy.
  • Analysis of the interplay between mitochondria and protein homeostasis (autophagy).

Main Results:

  • Specific interventions targeting mitochondria and pro-autophagic pathways demonstrate efficacy in extending healthspan and lifespan.
  • Autophagy plays a crucial role in maintaining mitochondrial quality control.
  • The crosstalk between mitochondria and autophagy, termed the mitochondria-proteostasis axis, is a key target.

Conclusions:

  • Targeting mitochondria and protein homeostasis, especially autophagy, represents a viable strategy for combating age-related diseases.
  • Interventions modulating the mitochondria-proteostasis axis hold significant promise for developing effective anti-aging therapies.
  • Further research into this axis could unlock maximal therapeutic potential for extending human healthspan.