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Related Concept Videos

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.
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Redox Reactions01:27

Redox Reactions

Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
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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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Aging01:26

Aging

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
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The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
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Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
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Related Experiment Video

Updated: Jun 4, 2025

Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry
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Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry

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Diet-Modifiable Redox Alterations in Ageing and Cancer.

Christopher Hine1,2, Anand Kumar Patel3,4, András K Ponti3,5

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Sub-Cellular Biochemistry
|December 18, 2024
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Aging brings both joys and challenges, including age-related diseases. Understanding aging mechanisms, like protein thiol oxidation, can lead to interventions that improve lifespan and healthspan.

Keywords:
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Area of Science:

  • Gerontology and cellular biology
  • Molecular mechanisms of aging

Background:

  • Population aging is increasing, presenting both opportunities and challenges.
  • Advanced age is associated with health decline and non-communicable diseases.
  • Improving lifespan and healthspan requires addressing aging processes.

Purpose of the Study:

  • To explore hypothesized causes of aging.
  • To review experimental interventions for slowing aging progression.
  • To highlight cellular and subcellular mechanisms of aging.

Main Methods:

  • Focus on protein thiol oxidation and its role in aging.
  • Investigate posttranslational modifications impacting cellular homeostasis.
  • Analyze mechanisms contributing to age-related cancers.

Main Results:

  • Protein thiol oxidation and specific posttranslational modifications are implicated in aging.
  • These molecular changes affect cellular homeostasis and disease progression.
  • Understanding these mechanisms is key to developing interventions.

Conclusions:

  • A deeper understanding of aging mechanisms is crucial.
  • This knowledge can facilitate the development of prophylactic and concurrent therapeutic strategies.
  • The goal is to enhance both lifespan and healthspan by mitigating aging effects.