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Aging01:26

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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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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...
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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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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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Nuclear envelope dysfunction and its contribution to the aging process.

Filipa Martins1, Jéssica Sousa1, Cátia D Pereira1

  • 1Neuroscience and Signaling Laboratory, Institute of Biomedicine (iBiMED), Department of Medical Sciences, University of Aveiro, Aveiro, Portugal.

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|April 16, 2020
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Summary
This summary is machine-generated.

Aging impairs the nuclear envelope (NE), affecting nuclear transport and genomic stability. Understanding these changes, particularly involving lamins and nucleoporins, is key to aging research and disease.

Keywords:
chromatin organizationinner nuclear membranelaminsnuclear pore complexnuclear transporttelomere maintenance

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Gerontology

Background:

  • The nuclear envelope (NE) protects the genome and mediates communication between the nucleus and cytoplasm.
  • Aging involves cellular functional decline, including alterations in nuclear transport, DNA damage, and telomere attrition.

Purpose of the Study:

  • To review proteins involved in age-related nuclear transport dysfunction.
  • To discuss changes in chromatin structure and NE integrity during aging.
  • To correlate telomere attrition with nuclear lamina alterations.

Main Methods:

  • Literature review and discussion of proteins associated with NE function and aging.
  • Analysis of age-related changes in nucleoporins, nuclear transport factors, and lamins.
  • Examination of chromatin structure, heterochromatin rearrangement, and telomere attrition in the context of NE dysfunction.

Main Results:

  • Aging is associated with nuclear transport dysfunction, involving proteins like nucleoporins and lamins.
  • Chromatin structure and heterochromatin undergo rearrangement during aging, correlating with NE dysfunction.
  • Telomere attrition is linked to altered levels of nuclear lamins and associated proteins.

Conclusions:

  • Nuclear envelope dysfunction, particularly involving lamins, is a hallmark of aging.
  • Understanding the molecular mechanisms of NE dysfunction in aging is crucial for understanding age-related diseases.
  • Further research into upstream and downstream events of NE dysfunction will advance aging and pathology insights.