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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...
Bone Disorders01:29

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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...
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...
Menopause01:28

Menopause

Menopause, a natural biological process marking the end of a woman's fertility, typically occurs between the fifth and sixth decade of life. This phase is characterized by the exhaustion of the ovarian follicle pool, leading to less responsive ovaries despite the high levels of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). The consequential decrease in estrogen production results in symptoms like hot flashes, heavy sweating, headaches, hair loss, muscle pains, vaginal...

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Related Experiment Video

Updated: May 12, 2026

Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry
08:52

Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry

Published on: April 6, 2022

Endocrine and metabolic changes in human aging.

W A Banks1, J E Morley

  • 1Division of Geriatric Medicine, Saint Louis University Medical School, 915 N. Grand Blvd., St. Louis, MO 63106 ; Geriatric Research, Education and Clinical Center, St. Louis VAMC, St. Louis, MO 63125.

Journal of the American Aging Association
|April 23, 2013
PubMed
Summary
This summary is machine-generated.

Aging alters hormonal secretion, disrupting normal patterns and lowering levels. Studying simpler organisms reveals genetic insights into longevity and syndrome X, linking environment, hormones, and insulin receptor genes.

Related Experiment Videos

Last Updated: May 12, 2026

Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry
08:52

Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry

Published on: April 6, 2022

Area of Science:

  • Endocrinology
  • Genetics
  • Aging Research

Background:

  • Aging is characterized by significant alterations in hormonal secretion patterns.
  • These changes include a decline in cyclic secretory patterns and reduced circulating hormone levels.
  • Age-related decreases in hormone receptors and postreceptor function impair coordinated bodily functions.

Purpose of the Study:

  • To explore age-related hormonal changes.
  • To investigate the role of simpler organisms in understanding human aging.
  • To examine the genetic control of longevity and syndrome X through environmental and hormonal interactions.

Main Methods:

  • Analysis of age-related hormonal secretion alterations.
  • Comparative studies in simpler organisms to understand aging regulatory systems.
  • Investigation of interactions between environment, hormones, and insulin receptor genes.

Main Results:

  • Observed disintegration of normal cyclic hormonal secretory patterns with aging.
  • Identified declines in receptor and postreceptor function contributing to impaired hormonal coordination.
  • Gained insights into the genetic control of longevity and syndrome X.

Conclusions:

  • Hormonal dysregulation is a key feature of the aging process.
  • Simpler organisms offer valuable models for studying aging and its genetic underpinnings.
  • Interactions involving environment, hormones, and insulin receptor genes are crucial for longevity and metabolic health.