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Related Concept Videos

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

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Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...
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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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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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Carbohydrates are polymers composed of molecules containing atoms of carbon, hydrogen and oxygen. One gram of carbohydrate can provide four kilo-calories of energy, which makes it the most efficient instant energy source.
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Related Experiment Video

Updated: Feb 11, 2026

Autofluorescence Imaging to Evaluate Cellular Metabolism
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Cellular Metabolism and Aging.

Andre Catic1

  • 1Huffington Center on Aging, Stem Cells and Regenerative Medicine Center, Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX, United States.

Progress in Molecular Biology and Translational Science
|April 15, 2018
PubMed
Summary

Aging involves metabolic shifts impacting cellular health and lifespan. This review explores how changes in protein quality, mitochondria, epigenetics, and nutrient-sensing pathways influence aging and longevity.

Keywords:
epigeneticsmitochondrianutrient-sensing pathwaysproteostasis

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Area of Science:

  • Biochemistry
  • Cellular Biology
  • Gerontology

Background:

  • Metabolic changes are key indicators of the aging process.
  • Alterations in specific metabolic pathways can influence lifespan.
  • Understanding these changes is crucial for addressing age-related decline.

Purpose of the Study:

  • To review the biochemical and homeostatic changes occurring during aging at the cellular level.
  • To highlight the roles of protein quality control, mitochondria, epigenetics, and nutrient-sensing pathways in aging.
  • To examine the interplay of these systems and their impact on cellular health.

Main Methods:

  • Literature review of aging research.
  • Analysis of cellular biochemistry and energy homeostasis.
  • Focus on key aging-related pathways and systems.

Main Results:

  • Aging alters cellular biochemistry and energy balance.
  • Protein quality control, mitochondria, epigenetics, and nutrient-sensing pathways are significantly affected by aging.
  • The interaction between these systems is critical for maintaining cellular health during aging.

Conclusions:

  • Metabolic alterations are central to aging.
  • Interventions targeting these pathways hold potential for extending lifespan and improving healthspan.
  • A holistic view of interconnected cellular systems is necessary for understanding aging.