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Videos de Conceptos Relacionados

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...
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 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...
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...

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'Just a fellow who did his job...', an interview with Leonard Hayflick. Interview by Suresh I.S. Rattan.

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Hormesis, aging and longevity determination.

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Video Experimental Relacionado

Updated: Jul 7, 2026

Methods to Study Changes in Inherent Protein Aggregation with Age in Caenorhabditis elegans
11:57

Methods to Study Changes in Inherent Protein Aggregation with Age in Caenorhabditis elegans

Published on: November 26, 2017

El futuro del envejecimiento.

L Hayflick1

  • 1Department of Anatomy, School of Medicine, University of California at San Francisco, 95497, USA. len@gene.com

Nature
|November 23, 2000
PubMed
Resumen

Comprender los procesos fundamentales del envejecimiento es crucial para aumentar la esperanza de vida humana. La investigación debe centrarse en por qué vivimos tanto como lo hacemos, no sólo por qué envejecemos.

Área de la Ciencia:

  • Gerontología Gerontología.
  • Investigación biomédica en la investigación biomédica.
  • La ciencia de la longevidad La ciencia de la longevidad

Sus antecedentes:

  • El conocimiento de las enfermedades asociadas a la edad ha superado la comprensión de los procesos fundamentales del envejecimiento.
  • Los avances médicos actuales se centran en el tratamiento de enfermedades, no en los mecanismos de envejecimiento subyacentes.
  • Resolver las principales causas de muerte solo aumentaría la esperanza de vida en aproximadamente 15 años.

Objetivo del estudio:

  • Para resaltar la necesidad de un mayor enfoque en la investigación básica sobre el envejecimiento.
  • Diferenciar entre los conceptos de envejecimiento y longevidad.
  • Para replantear las preguntas de investigación hacia la comprensión de los determinantes de la esperanza de vida.

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An Experimental Paradigm for Measuring the Effects of Ageing on Sentence Processing
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An Experimental Paradigm for Measuring the Effects of Ageing on Sentence Processing

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High-Throughput Behavioral Aging and Lifespan Assays Using the Lifespan Machine
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High-Throughput Behavioral Aging and Lifespan Assays Using the Lifespan Machine

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Videos de Experimentos Relacionados

Last Updated: Jul 7, 2026

Methods to Study Changes in Inherent Protein Aggregation with Age in Caenorhabditis elegans
11:57

Methods to Study Changes in Inherent Protein Aggregation with Age in Caenorhabditis elegans

Published on: November 26, 2017

An Experimental Paradigm for Measuring the Effects of Ageing on Sentence Processing
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An Experimental Paradigm for Measuring the Effects of Ageing on Sentence Processing

Published on: October 25, 2019

High-Throughput Behavioral Aging and Lifespan Assays Using the Lifespan Machine
08:53

High-Throughput Behavioral Aging and Lifespan Assays Using the Lifespan Machine

Published on: January 26, 2024

Principales métodos:

  • Análisis conceptual del envejecimiento y la longevidad.
  • Revisión de las prioridades de investigación actuales en el envejecimiento y las enfermedades.
  • Exploración de posibles direcciones de investigación futuras.

Principales resultados:

  • La investigación actual aborda predominantemente las enfermedades asociadas a la edad, descuidando el envejecimiento fundamental.
  • Se propone un cambio de enfoque de 'por qué envejecemos' a 'por qué vivimos tanto como lo hacemos'.
  • Las intervenciones en el proceso de envejecimiento en sí pueden conducir a consecuencias negativas imprevistas.

Conclusiones:

  • La investigación básica sobre los procesos fundamentales del envejecimiento es esencial para incrementar significativamente la esperanza de vida humana.
  • Distinguir entre el envejecimiento y la longevidad es clave para avanzar en el campo.
  • Las futuras intervenciones en el envejecimiento requieren una cuidadosa consideración de los posibles resultados no deseados.