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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

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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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

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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 Distribution01:00

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

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Drug distribution in the human body is influenced by several factors, including plasma protein concentration, body composition, blood flow, tissue-protein concentration, and tissue fluid pH. Among these, changes in plasma protein concentration and body composition due to aging significantly affect how drugs are distributed within the body. Specifically, aging is associated with a decrease in albumin levels by about 10% and an increase in α1-acid glycoprotein levels. These alterations are...
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Drug Dosing: Geriatric Patients01:15

Drug Dosing: Geriatric Patients

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Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
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Related Experiment Video

Updated: May 2, 2026

Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry
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[Aging and metabolism: changes and regulation].

Genaro Gabriel Ortiz, Elva D Arias-Merino, Irma E Velázquez-Brizuela

    Archivos Latinoamericanos De Nutricion
    |March 13, 2014
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    Summary
    This summary is machine-generated.

    Aging naturally slows metabolism, impacting energy balance and health. However, an active lifestyle and circadian rhythms can regulate metabolism, improving quality of life for older adults.

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    Area of Science:

    • Gerontology and Metabolic Science
    • Physiology of Aging

    Context:

    • Aging is associated with natural metabolic deceleration and altered energy regulation.
    • Changes in caloric intake during aging increase susceptibility to energy imbalance and health deterioration.

    Purpose:

    • To review current knowledge on energy metabolism regulation in aging.
    • To analyze factors influencing energy expenditure and metabolic health in older adults.
    • To identify strategies for improving quality of life and health maintenance in old age.

    Summary:

    • Metabolic deceleration is a hallmark of aging, leading to weight and fat loss and increased risk of energy imbalance.
    • Despite age-related metabolic changes, metabolism can be modulated through lifestyle interventions and by understanding the role of circadian rhythms.
    • Regulatory proteins mediating circadian rhythms are crucial for cellular function and overall health during aging.

    Impact:

    • Provides updated information for developing programs to enhance the quality of life and prevent disability in the elderly.
    • Highlights the potential for lifestyle and biological clock regulation to mitigate negative metabolic effects of aging.
    • Aims to improve health maintenance and well-being in the aging population through better understanding of metabolic regulation.