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Related Concept Videos

Human Genetics01:28

Human Genetics

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
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Aging01:26

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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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The Effect of Aging on Tissues01:19

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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...
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Mitochondria01:37

Mitochondria

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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
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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...
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Longitudinal Research02:20

Longitudinal Research

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Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
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Related Experiment Video

Updated: Dec 24, 2025

Frailty Assessment in an Aging Mouse Model
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Genetics of frailty: A longevity perspective.

Sanish Sathyan1, Joe Verghese2

  • 1Department of Neurology, Albert Einstein College of Medicine, Bronx, New York.

Translational Research : the Journal of Laboratory and Clinical Medicine
|April 15, 2020
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Summary

This study reviews genetic research on frailty, a condition linked to aging and increased mortality. Understanding the biology of frailty and longevity may reveal new interventions for healthy aging.

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Area of Science:

  • Gerontology and Genetics
  • Molecular Biology and Aging

Background:

  • Frailty is a late-life condition involving physiological decline, increasing risks for disability and mortality.
  • Aging processes contribute to frailty and complex diseases, while longevity is associated with protective mechanisms.
  • Interplay between aging biology and longevity mechanisms is key to understanding and potentially intervening in frailty.

Purpose of the Study:

  • To review genetic research concerning frailty.
  • To explore the intertwined biology of aging, frailty, and longevity.
  • To identify potential avenues for interventions promoting healthspan and successful aging.

Main Methods:

  • Literature review of genetic studies on frailty.
  • Analysis of biological mechanisms underlying aging and longevity.
  • Discussion of genetic factors influencing frailty and lifespan.

Main Results:

  • Genetic research on frailty faces challenges due to phenotype complexity and low heritability.
  • Aging-related biological changes are implicated in frailty.
  • Longevity may involve distinct protective biological mechanisms.

Conclusions:

  • Deciphering the genetic basis of frailty and longevity is crucial for developing interventions.
  • Understanding the complex interplay between aging, frailty, and longevity can guide strategies for successful aging.
  • Further research into genetic mechanisms is needed to address frailty and promote healthspan.