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Related Concept Videos

Aging01:26

Aging

1.1K
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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The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

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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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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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Mitochondria01:37

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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Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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Surveying Low-Cost Methods to Measure Lifespan and Healthspan in Caenorhabditis elegans
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Geroscience: linking aging to chronic disease.

Brian K Kennedy1, Shelley L Berger2, Anne Brunet3

  • 1Buck Institute for Research on Aging, Novato, CA USA.

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Scientists are exploring genetic, dietary, and drug interventions to slow mammalian aging. Expanding geroscience research is crucial for increasing human healthspan, especially with a growing elderly population.

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Area of Science:

  • Gerontology and aging research
  • Biomedical sciences
  • Longevity studies

Background:

  • The global elderly population is rapidly expanding.
  • Aging is the primary risk factor for numerous chronic diseases.
  • Chronic diseases significantly contribute to morbidity and mortality.

Purpose of the Study:

  • To highlight the critical need for advancing geroscience.
  • To emphasize the importance of extending human healthspan.
  • To underscore the potential of interventions in delaying aging.

Main Methods:

  • Review of existing literature on aging interventions.
  • Analysis of demographic trends in aging populations.
  • Synthesis of data on aging as a risk factor for disease.

Main Results:

  • Mammalian aging can be modulated through genetic, dietary, and pharmacological strategies.
  • Increased healthspan is a key objective in aging research.
  • Geroscience offers a pathway to mitigate age-related chronic diseases.

Conclusions:

  • Further investment in geroscience is essential.
  • Interventions targeting aging processes can improve public health.
  • Extending healthspan is a critical goal for an aging world.