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Related Concept Videos

Aging01:26

Aging

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...
Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

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...
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

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...
Drug Dosing: Geriatric Patients01:15

Drug Dosing: Geriatric Patients

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

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

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 not...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

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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Related Experiment Video

Updated: Jun 24, 2026

A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging
09:37

A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging

Published on: July 14, 2016

Modulating human aging and age-associated diseases.

Luigi Fontana1

  • 1Division of Geriatrics and Nutritional Science and Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO 63110, USA. lfontana@dom.wustl.edu

Biochimica Et Biophysica Acta
|April 15, 2009
PubMed
Summary
This summary is machine-generated.

Healthy lifestyle interventions can prevent and reverse age-associated chronic diseases like type 2 diabetes and cardiovascular disease. More intensive strategies like calorie restriction may further impact aging biology.

Related Experiment Videos

Last Updated: Jun 24, 2026

A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging
09:37

A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging

Published on: July 14, 2016

Area of Science:

  • Gerontology and Public Health
  • Chronic Disease Epidemiology
  • Nutritional Science

Background:

  • Population aging is a significant demographic shift, particularly in industrialized nations.
  • Aging is strongly linked to chronic diseases such as type 2 diabetes mellitus, cancer, and cardiovascular diseases in sedentary populations consuming Western diets.
  • Chronic diseases in older adults represent a major cause of morbidity, mortality, and escalating healthcare costs.

Purpose of the Study:

  • To review the evidence on lifestyle interventions for preventing and reversing age-associated chronic diseases.
  • To explore the potential benefits of more intensive dietary interventions on aging biology.
  • To highlight the need for further research into the complex factors regulating aging and disease.

Main Methods:

  • Review of epidemiological studies and clinical trials.
  • Analysis of recent research on calorie and protein restriction.
  • Synthesis of current understanding of aging and chronic disease interactions.

Main Results:

  • Epidemiological data and clinical trials suggest lifestyle interventions can prevent and reverse many age-associated chronic diseases.
  • Emerging research indicates that calorie restriction (without malnutrition) and moderate protein restriction (with adequate nutrition) may positively influence metabolic and hormonal factors related to aging.
  • Significant portions of the older adult population (80% with one, 50% with two chronic diseases) are affected.

Conclusions:

  • Healthy lifestyle interventions are crucial for managing and potentially reversing age-associated chronic diseases.
  • More restrictive dietary interventions show promise for impacting the fundamental biology of aging.
  • Further investigation is required to fully elucidate the complex interplay between aging, lifestyle, and chronic disease development.