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Mitochondria

Mitochondria

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,...

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 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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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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Imaging and Quantifying Mitochondrial Morphology in C. elegans During Aging

Imaging and Quantifying Mitochondrial Morphology in C. elegans During Aging

Published on: January 17, 2025

Inclusions in aged mitochondria.

K S Cheah¹, A M Cheah

¹Agricultural Research Council, Meat Research Institute, Langford, Bristol, BS18 7DY, UK.

Journal of Bioenergetics and Biomembranes

|April 1, 1977

Summary

This summary is machine-generated.

Postmortem aging causes paracrystalline inclusions in mitochondria. These inclusions, primarily in the intracristal space, form due to aging changes, not pH levels.

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Area of Science:

Cell Biology
Mitochondrial Research
Postmortem Studies

Background:

Mitochondria are crucial for cellular energy production.
Postmortem changes can affect cellular structures.
Paracrystalline inclusions are observed in aged mitochondria.

Purpose of the Study:

Investigate the formation of paracrystalline inclusions in mitochondria.
Determine the localization of these inclusions.
Identify factors influencing inclusion formation, such as pH and aging.

Main Methods:

Microscopic examination of mitochondria postmortem.
In vitro experiments with mitochondrial suspensions.
pH manipulation studies.

Main Results:

Inclusions localize in the intracristal space or between mitochondrial membranes.
The majority of inclusions are of the intracristal type.
Lowering pH did not increase inclusion formation.

Conclusions:

Mitochondrial aging is the primary cause of paracrystalline inclusion formation.
Prolonged preservation, both in situ and in vitro, contributes to these changes.
pH is not a significant factor in the development of these inclusions.