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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...
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...
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...
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 23, 2026

A Quantitative Measurement of Reactive Oxygen Species and Senescence-associated Secretory Phenotype in Normal Human Fibroblasts During Oncogene-induced Senescence
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Published on: August 12, 2018

Hsps and aging.

John Tower1

  • 1Molecular and Computational Biology Program, Department of Biological Sciences, University of Southern California, Los Angeles, CA, 90089-2910, USA. jtower@usc.edu

Trends in Endocrinology and Metabolism: TEM
|April 28, 2009
PubMed
Summary
This summary is machine-generated.

Heat-shock proteins (Hsps) are crucial for aging and lifespan regulation across species. These proteins can extend lifespan and combat age-related diseases by managing cellular stress and proteotoxicity.

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Area of Science:

  • Gerontology
  • Molecular Biology
  • Cellular Biology

Background:

  • Heat-shock proteins (Hsps) are vital cellular components involved in stress response.
  • Aging is associated with altered Hsps expression and function.
  • Hsps are regulated by conserved pathways like heat-shock factor and insulin/IGF1 signaling.

Purpose of the Study:

  • To review the role of Hsps in aging phenotypes and lifespan.
  • To explore Hsps as potential biomarkers and therapeutic targets for aging and related diseases.

Main Methods:

  • Literature review of studies on Hsps in aging across various species.
  • Analysis of Hsp expression patterns in aging and disease.
  • Examination of Hsp function in model organisms and cellular aging phenotypes.

Main Results:

  • Hsp levels and stress-induced expression correlate with lifespan.
  • Hsps extend lifespan and reduce proteotoxicity in model organisms.
  • Hsps regulate key aging phenotypes like senescence, apoptosis, and cancer.

Conclusions:

  • Hsps are critical regulators of aging and lifespan.
  • Hsps serve as indicators of cellular stress and aging.
  • Hsps represent promising targets for interventions against aging and age-related diseases.