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Related Concept Videos

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...
367
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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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...
861
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...
400
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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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution01:00

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

382
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...
382

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Drugs that modulate aging: the promising yet difficult path ahead.

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Aging research is rapidly advancing due to global population aging and scientific breakthroughs. Strategies are needed to translate these discoveries into therapies for chronic diseases or lifespan extension.

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Area of Science:

  • Gerontology and Longevity Research
  • Biomedical Sciences
  • Translational Medicine

Background:

  • The global population is aging rapidly, with 20% expected to be over 60 by 2050, posing significant public health and economic challenges.
  • Aging research has progressed significantly using model organisms, identifying numerous aging genes and conserved longevity pathways.
  • Small molecules like rapamycin and resveratrol show potential in slowing aging in model organisms, with implications for human health.

Purpose of the Study:

  • To discuss strategies for translating aging research discoveries into therapeutic drugs.
  • To explore the potential of aging research in developing novel therapies for chronic diseases.
  • To examine approaches for targeting aging directly for lifespan extension.

Main Methods:

  • Review of current trends in aging demographics and disease incidence.
  • Analysis of genetic and molecular discoveries in aging research using model organisms.
  • Evaluation of small molecules impacting aging pathways and longevity.
  • Discussion of regulatory and translational challenges for aging-related therapies.

Main Results:

  • Identification of conserved longevity pathways across species, including potential relevance to humans.
  • Demonstration that certain small molecules can slow aging processes in model organisms.
  • Highlighting the significant potential for developing interventions to delay human aging.
  • Acknowledging the challenge of drug approval when aging is not classified as a disease.

Conclusions:

  • Aging research is poised to become a forefront medical discipline.
  • Translational strategies are crucial for developing drugs targeting aging for disease prevention or lifespan extension.
  • The field holds promise for novel therapies addressing age-related chronic diseases and improving healthspan.