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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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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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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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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
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Mitochondrial-associated metabolic disorders: foundations, pathologies and recent progress.

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Mitochondria are dynamic organelles involved in numerous cellular functions beyond energy production. Mitochondrial dysfunction is linked to various human pathologies, particularly metabolic diseases, necessitating further research.

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Genetics

Background:

  • Mitochondria are now recognized as dynamic, mobile organelles involved in crucial cellular processes like calcium buffering, lipid flux, and intracellular signaling.
  • Recent research has shifted the view of mitochondria from mere cellular powerhouses to integral components of cellular complexity.
  • Functional defects in mitochondria are increasingly implicated in a wide spectrum of human pathologies.

Purpose of the Study:

  • To summarize current knowledge and recent advancements in mitochondrial biology.
  • To review mitochondrial processes relevant to metabolic diseases stemming from mitochondrial dysfunction.
  • To provide insights into current and future research directions for mitochondrial-associated diseases.

Main Methods:

  • This review synthesizes existing literature and research findings.
  • It focuses on summarizing background knowledge and recent developments.
  • The approach involves analyzing the complex interplay between mitochondrial function and cellular processes.

Main Results:

  • Mitochondria play multifaceted roles in cellular signaling, lipid metabolism, and calcium homeostasis.
  • Mitochondrial dysfunction is a significant factor in the pathogenesis of various human diseases, especially metabolic disorders.
  • The intricate relationship between mitochondria, cellular processes, and genetic background complicates the understanding and treatment of these diseases.

Conclusions:

  • A comprehensive understanding of mitochondrial dynamics and functions is crucial for addressing mitochondrial-associated diseases.
  • Further investigation into the complex mechanisms underlying mitochondrial dysfunction is warranted.
  • Targeting mitochondrial pathways presents potential therapeutic avenues for metabolic diseases.