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Related Concept Videos

Aging01:26

Aging

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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.
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...
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Lumber Defects01:23

Lumber Defects

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Lumber defects, which can affect both the appearance and structural integrity of wood, include a variety of growth and manufacturing flaws. Growth defects such as knots and knotholes occur where branches were once attached to the tree trunk, with knotholes forming when these knots fall out. Other natural defects include decay and insect damage, which compromise the wood's strength and durability.
Shakes are minor fractures that run along or across the wood's annual rings, while wane is...
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The Effect of Aging on Tissues01:19

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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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Changes in the Appendicular Skeleton with Age01:09

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The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
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Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

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Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption01:22

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

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As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
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Visual Defects and Ageing.

Sergio Claudio Saccà1, Carlo Alberto Cutolo2, Tommaso Rossi3

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|March 20, 2019
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This summary is machine-generated.

Neurodegenerative diseases like Alzheimer's and Parkinson's share common pathways with Glaucoma, including oxidative damage and protein aggregate buildup. Understanding these links can improve treatments for both brain and vision conditions.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Pathology

Background:

  • Age-related diseases encompass neurodegeneration, a significant health concern.
  • Alzheimer's disease, Parkinson's disease, and Glaucoma share common pathogenic events.
  • These shared events include oxidative damage, mitochondrial dysfunction, and endothelial alterations.

Purpose of the Study:

  • To explore the common molecular and cellular mechanisms underlying neurodegenerative diseases and Glaucoma.
  • To highlight similarities in protein aggregate deposition, cellular injury, and neuronal loss.
  • To underscore the relevance of studying these shared pathways for therapeutic development.

Main Methods:

  • Comparative analysis of pathogenic events in Alzheimer's, Parkinson's, and Glaucoma.
  • Review of molecular aspects such as endoplasmic reticulum autophagy and neuronal apoptosis.
  • Examination of protein aggregate accumulation in retinal ganglion cells (RGCs) and brain tissues.

Main Results:

  • Commonalities identified include oxidative stress, mitochondrial dysfunction, and endothelial changes.
  • Shared molecular pathways involve endoplasmic reticulum autophagy and neuronal apoptosis.
  • Protein aggregates, including Tau and beta-amyloid, are implicated in both Glaucoma and neurodegenerative diseases.

Conclusions:

  • Glaucoma and neurodegenerative diseases share fundamental pathological bases.
  • Understanding these commonalities can lead to novel therapeutic strategies.
  • Visual field changes in Glaucoma may reflect broader neurodegenerative processes.