Changes in the Mitochondria in the Aging Process-Can α-Tocopherol Affect Them?
Gaetana Napolitano1, Gianluca Fasciolo2, Maria Teresa Muscari Tomajoli1
1Department of Science and Technology, University of Naples Parthenope, Via Acton n. 38, I-80133 Naples, Italy.
International Journal of Molecular Sciences
|August 12, 2023
Summary
Mitochondria, vital for energy, produce reactive oxygen species (ROS) that impact aging. This review explores how vitamin E may protect mitochondria from age-related damage, suggesting its importance for healthy aging strategies.
Area of Science:
- Cellular biology
- Mitochondrial function
- Aging research
Background:
- Mitochondria are central to energy production and cellular regulation.
- Oxygen utilization generates reactive oxygen species (ROS), which have dual roles as damaging agents and signaling molecules.
- Mitochondrial dysfunction, often ROS-mediated, is implicated in the aging process.
Purpose of the Study:
- To review the effects of aging on mitochondrial quality control.
- To examine the role of mitochondria in inflammation during aging.
- To investigate the potential protective effects of vitamin E against age-related mitochondrial alterations.
Main Methods:
- Literature review focusing on aging, mitochondria, ROS, and vitamin E.
- Analysis of existing data on mitochondrial changes during aging.
- Synthesis of information regarding vitamin E's antioxidant properties in relation to mitochondrial health.
Main Results:
- Aging impairs mitochondrial quality and quality control systems.
- Mitochondria are involved in age-related inflammation.
- Current data on vitamin E's protective effects on mitochondria in aging is limited but suggests potential benefits.
Conclusions:
- Understanding vitamin E's impact on mitochondria is crucial for developing effective healthy aging interventions.
- Further research is needed to elucidate the mechanisms and extent of vitamin E's protective role.
- Optimizing vitamin E strategies could contribute to mitigating age-related mitochondrial decline.
Related Concept Videos
01:37Mitochondria
13.8K
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,...
13.8K
01:46Electron Transport Chain: Complex I and II
14.5K
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...
ROS generation is regulated and maintained at moderate levels necessary...
14.5K
01:19The Effect of Aging on Tissues
2.1K
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...
2.1K
01:45Mitochondrial Membranes
11.6K
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,...
11.6K
01:19Translocation of Proteins into the Mitochondria
3.2K
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,...
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,...
3.2K
01:26Aging
86
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
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
86