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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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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
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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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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.
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Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools
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Coenzyme Q10 in aging and disease.

Amin Gasmi1, Geir Bjørklund2, Pavan Kumar Mujawdiya3

  • 1Société Francophone de Nutrithérapie et de Nutrigénétique Appliquée, Villeurbanne, France.

Critical Reviews in Food Science and Nutrition
|October 27, 2022
PubMed
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Coenzyme Q10 (CoQ10) is vital for energy production and acts as an antioxidant. Supplementation may benefit conditions linked to CoQ10 deficiency and oxidative stress, but more research is needed.

Keywords:
Coenzyme Q10agingdisease

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Area of Science:

  • Biochemistry
  • Cellular Biology
  • Nutritional Science

Background:

  • Coenzyme Q10 (CoQ10) is crucial for the electron transport chain and cellular membrane antioxidant function.
  • Endogenous CoQ10 production can decrease with age or enzyme dysfunction, potentially increasing oxidative stress.
  • Certain medications, like statins, can inhibit enzymes involved in CoQ10 synthesis.

Purpose of the Study:

  • To review the role of Coenzyme Q10 (CoQ10) in cellular processes and its potential therapeutic applications.
  • To explore the impact of CoQ10 deficiency and the benefits of oral supplementation.
  • To identify the need for further clinical trials on CoQ10 for various health conditions.

Main Methods:

  • Review of existing literature on Coenzyme Q10 (CoQ10) function, deficiency, and supplementation.
  • Analysis of clinical trial data regarding the effects of oral CoQ10 on different disorders.
  • Identification of research gaps and recommendations for future studies.

Main Results:

  • Oral CoQ10 supplementation can elevate circulating and intracellular CoQ10 levels.
  • Clinical trials suggest beneficial effects of CoQ10 in cardiovascular disease and inflammation.
  • CoQ10 shows promise for metabolic syndrome, type 2 diabetes, neurodegenerative diseases, and male infertility.

Conclusions:

  • Coenzyme Q10 (CoQ10) plays a significant role in cellular health and disease prevention.
  • Supplementation may mitigate risks associated with CoQ10 deficiency and oxidative stress.
  • Further large-scale, long-term clinical trials are necessary to confirm the therapeutic benefits of CoQ10.