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Related Concept Videos

Aging01:26

Aging

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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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Pharmacodynamics in Geriatric Patients: Effects of Age01:27

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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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Cognitive Development During Adulthood01:30

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Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
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Longitudinal Research02:20

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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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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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An Experimental Paradigm for Measuring the Effects of Ageing on Sentence Processing
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New Directions in Research on Aging.

Andrzej Bartke1

  • 1Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge St., P. O. Box 19628, Springfield, IL, 62794-9628, USA. abartke@siumed.edu.

Stem Cell Reviews and Reports
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Research on aging biology is shifting towards understanding its complex mechanisms and developing interventions. Advances in technology and a focus on nutrient signaling pathways offer hope for extending healthspan and improving public health.

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Area of Science:

  • Biomedical research
  • Gerontology
  • Molecular biology

Background:

  • The study of aging has evolved from symptom observation to mechanism investigation.
  • Aging is now understood as a complex interplay of multiple physiological changes.
  • Nutrient-dependent signaling pathways are conserved mechanisms of aging.

Purpose of the Study:

  • To explore the shifting focus in aging research from effects to mechanisms.
  • To highlight the role of nutrient signaling pathways in aging.
  • To emphasize the development of interventions for healthspan extension.

Main Methods:

  • Analysis of gene expression, protein, lipid, and metabolite profiles.
  • Genetic modifications and advanced biological age assessment.
  • Investigation of pharmacological and environmental interventions.

Main Results:

  • Aging is a multifactorial process involving intricate physiological interactions.
  • Nutrient-dependent pathways are evolutionarily conserved aging mechanisms.
  • Aging is a significant risk factor for chronic diseases, impacting resilience.

Conclusions:

  • Research progress, driven by technological advances, fuels optimism for anti-aging interventions.
  • Interventions targeting aging mechanisms could yield significant benefits for individual and public health.
  • Understanding aging biology is crucial for developing strategies to extend healthspan.